Patent Publication Number: US-2018031200-A1

Title: Vehicle lamp and control method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     Pursuant to 35 U.S.C. §119(a), this application claims the benefit of an earlier filing date and the right of priority to Korean Application No. 10-2016-0085723, filed on Jul. 6, 2016, the contents of which are incorporated by reference herein in its entirety. 
     TECHNICAL FIELD 
     This disclosure generally relates to a lamp provided in a vehicle, and a method for controlling the same. 
     BACKGROUND 
     A vehicle is typically provided with various types of lamps that perform various illumination functions. For example, vehicle lamps facilitate recognition of objects near the vehicle, or implement a signaling function to inform those outside the vehicle of a driving state of the vehicle. 
     An illumination function of a vehicle lamp is typically implemented, for example, by a head lamp or a fog lamp. A signaling function is typically implemented by a turn signal lamp, a tail lamp, a brake lamp, or a side marker. 
     The design, installation, and operation of lamps in vehicles are typically regulated by various legal, regulatory, and/or industry standards. 
     SUMMARY 
     Implementations described herein provide a vehicle lamp that is configured to adaptively generate different light distribution patterns. 
     In one aspect, a vehicle lamp may include at least one head lamp having a plurality of optical modules spaced apart from each other. Each optical module may include a base substrate and a plurality of light emitting diodes disposed on the base substrate. At least some of the plurality of light emitting diodes may be configured to be operated independently of other of the plurality of light emitting diodes. The vehicle lamp may also include at least one processor configured to control a first subset of light emitting diodes among the plurality of light emitting diodes to form a first light distribution pattern; and control a second subset of light emitting diodes among the plurality of light emitting diodes to form a second light distribution pattern that corresponds to and is superimposed on the first light distribution pattern formed by the first subset of light emitting diodes. 
     In some implementations, the at least one processor may be configured to control the second subset of light emitting diodes to form the second light distribution pattern that corresponds to and is superimposed on the first light distribution pattern by: controlling each light emitting diode in the second subset of light emitting diodes to output light in a direction and with a brightness that corresponds to a corresponding light emitting diode in the first subset of light emitting diodes. 
     In some implementations, the at least one processor may be further configured to: control the first subset of light emitting diodes to form a third light distribution pattern different from the first light distribution pattern; and control the second subset of light emitting diodes to form a fourth light distribution pattern that corresponds to and is superimposed on the third light distribution pattern. 
     In some implementations, the at least one processor may be further configured to: select, from among a plurality of light distribution patterns, a selected light distribution pattern; and control an on/off state of at least some of the plurality of light emitting diodes to form the selected light distribution pattern. 
     In some implementations, the at least one processor may be further configured to control the at least one head lamp to change a cut-off line of light output from the at least one head lamp according to the selected light distribution pattern. 
     In some implementations, the vehicle lamp may further include a memory configured to store information regarding the plurality of light distribution patterns. 
     In some implementations, the plurality of light distribution patterns stored in the memory may be updated based on information received from a server. 
     In some implementations, the at least one processor may be further configured to select the selected light distribution pattern from among the plurality of light distribution patterns based on a position of a vehicle. 
     In some implementations, the at least one processor may be further configured to select the selected light distribution pattern from among the plurality of light distribution patterns based on an angle between a horizontal line and an axis extending from a front side to a rear side of a vehicle. 
     In some implementations, the at least one processor may be further configured to control the at least one head lamp to change a height of a cut-off line of light output from the at least one head lamp according to the selected light distribution pattern. 
     In some implementations, the at least one processor may be further configured to select the selected light distribution pattern from among the plurality of light distribution patterns based on a steering angle of a steering wheel of a vehicle. 
     In some implementations, the at least one processor may be further configured to select the selected light distribution pattern from among the plurality of light distribution patterns based on a user input. 
     In some implementations, the vehicle lamp may further include a display unit configured to, in a state in which a light distribution pattern selection mode is executed, display a graphic object corresponding to the selected light distribution pattern. 
     In some implementations, the at least one processor may be further configured to: based on an object being sensed at a front side of the vehicle, control the plurality of light emitting diodes to form a partial illumination region among an entire region of the first light distribution pattern and the second light distribution pattern, the partial illumination region corresponding to the object and having a brightness that is smaller than a first brightness value. 
     In some implementations, the at least one processor may be further configured to: based on the object being sensed at the front side of the vehicle, control at least one of the plurality of light emitting diodes that form the partial illumination region to turn off or to reduce in brightness. 
     In some implementations, the at least one processor may be further configured to control the plurality of light emitting diodes such that an amount of optical output for at least one of the first light distribution pattern or the second light distribution pattern is changed according to a preset condition. 
     In some implementations, the first subset of light emitting diodes may be disposed on a base substrate of a first head lamp, and the second subset of light emitting diodes may be disposed on a base substrate of a second head lamp different from the first head lamp. 
     In some implementations, the at least one processor may be further configured to: control a first amount of optical output for the first light distribution pattern by turning off at least one light emitting diode among the first subset of light emitting diodes; and control a second amount of optical output for the second light distribution pattern by turning off at least one of the light emitting diode among the second subset of light emitting diodes. 
     In some implementations, the at least one processor may be further configured to: control a first amount of optical output for the first light distribution pattern by controlling a brightness of at least one light emitting diode among the first subset of light emitting diodes; and control a second amount of optical output for the second light distribution pattern by controlling a brightness of at least one light emitting diode among the second subset of light emitting diodes. 
     In some implementations, the preset condition may be a brightness condition external to a vehicle. 
     Further scope of applicability of the present disclosure will become more apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples are given by way of illustration only, and that various changes and modifications within the spirit and scope of the disclosure may be made. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram illustrating an example of a vehicle lamp according to some implementations; 
         FIG. 2A  is a diagram illustrating an example of an optical module provided at the vehicle lamp shown in  FIG. 1 ; 
         FIG. 2B  is a diagram illustrating an example of a partial light distribution pattern generated by the optical module shown in  FIG. 2A ; 
         FIG. 2C  is a diagram illustrating an example of an entire light distribution pattern generated by optical modules included in the vehicle lamp shown in  FIG. 1 ; 
         FIGS. 3A to 3D  are diagrams illustrating examples of generating an entire light distribution pattern in a divided irradiation manner by first and second lamps included in the vehicle lamp; 
         FIGS. 4A to 4C  are diagrams illustrating examples of generating an entire light distribution pattern in an overlapped irradiation manner by the first and second lamps included in the vehicle lamp; 
         FIGS. 5A to 5F  are diagrams illustrating examples of a sectional surface of a vehicle lamp taken along line ‘A-A’, and examples of various structures of the vehicle lamp according to some implementations; 
         FIG. 6  is a diagram illustrating an example of controlling a vehicle lamp; 
         FIG. 7  is a diagram illustrating an example of controlling a vehicle lamp to output a light distribution pattern that satisfies a first condition; 
         FIGS. 8A and 8B  are diagrams illustrating examples of changing a light distribution pattern and/or a cut off line, based on driving information of a vehicle; 
         FIGS. 9A and 9B  are diagrams illustrating examples of changing a light distribution pattern according to an object sensed at a front side of a vehicle; 
         FIGS. 10 and 11  are diagrams illustrating examples of generating a brightness difference in a light distribution pattern; 
         FIGS. 12 and 13  are diagrams illustrating examples of a light source provided in a vehicle lamp; 
         FIG. 14  is a flowchart illustrating an example of a vehicle lamp updating a light distribution pattern; 
         FIG. 15  is a flowchart illustrating an example of controlling a vehicle lamp in a state in which one or more light emitting diodes have malfunctioned; and 
         FIGS. 16 and 17  are diagrams illustrating examples of a vehicle lamp changing a light distribution pattern according to a user&#39;s input. 
     
    
    
     DETAILED DESCRIPTION 
     Implementations described herein provide a vehicle lamp configured to adaptively output different light distribution patterns through a simplified configuration. In some implementations, the vehicle lamp may be configured to generate light distribution patterns having a cut-off line, and may be configured to adaptively move the cut-off line using a fixed state of optical modules. 
     A vehicle lamp may form a beam pattern having a predetermined cut-off line according to various purposes. For instance, a head lamp may irradiate high beams to a distant region to facilitate a long-distance view, and irradiate low beams to a local area around the vehicle to mitigate glare for oncoming vehicles. To implement such operations, as an example in case of a low beam, the head lamp may be configured to irradiate the low-beam light only to a region below a cut-off line so as to mitigate glare for other vehicles located at a front side of the vehicle. 
     The vehicle lamp may adaptively output the different illumination patterns having a high resolution and control an amount of illumination to satisfy certain conditions (e.g., legal, regulatory, or industry standards). 
     In some implementations, a vehicle may implement an adaptive front lighting system that changes a light distribution pattern according to a driving state of a vehicle. For example, a head lamp may be controlled to output a light distribution pattern that adaptively changes according to a driving speed, a driving direction, a road state, a peripheral brightness, or other driving states of the vehicle. 
     In some implementations, the adaptive front lighting system may be configured to adaptively change a light distribution pattern for a low beam and/or a high beam. For instance, in case of low beams, a light distribution pattern may be changed based on driving information of a vehicle. In case of high beams, a light distribution pattern may be changed in an adaptive manner, e.g., according to an object positioned at a front side of the vehicle, such as another oncoming vehicle. 
     As an example of adaptively forming different light distribution patterns, light that is emitted from a light source may be partially shielded, for example by a shield or mask, to generate different light output patterns. In such scenarios, the shield may be controlled to adaptively control a shield direction, a shield degree, etc., of the light. However, such scenarios are limited due to a limited structure of such shields. For example, a shield may only be able to generate a limited number and type of light distribution patterns, and implementing such shields may increase complexity of the vehicle lamp, and increase fabrication costs. 
     According to implementations described herein, a vehicle lamp is provided that has a simplified structure and that is configured to more easily generate various light distribution patterns. 
     In some implementations, the vehicle lamp may be configured to control pixels individually to generate different light distribution patterns. As such, by adaptively controlling the on/off state of individual pixels, additional structures to form a light distribution pattern may not be required. Accordingly, the vehicle lamp may have a simplified structure, resulting in reduction of space occupied by the vehicle lamp in a vehicle, and reduction of fabrication costs. 
     Further, the optical modules implemented in the vehicle lamp may be fabricated by the same process and may be installed in the vehicle lamp according to a desired optical output amount. As such, the vehicle lamp may be configured to output a sufficient amount of light through a simple configuration, and generate various light distribution patterns. 
     The vehicle lamp may be configured to adaptively move a cut-off line in the light distribution patterns using a fixed state of the optical modules by controlling an on/off state of light emitting diodes included in a display light source. As such, the vehicle lamp may not necessarily require a motor or other mechanism for aiming the vehicle lamp, and the vehicle lamp may thus be implemented in a reduced and simplified configuration. 
     According to implementations described herein, the adaptive operability and functionality of the vehicle lamp may enable the vehicle lamp to be developed using a single common specification. As such, fabrication costs may be reduced, and the vehicle lamp may be utilized in various countries and under various legal and regulatory standards without necessarily changing the physical configuration of the vehicle lamp. 
     A vehicle lamp of the present disclosure may include, as examples, a headlight (a head lamp), a tail lamp, a sidelight, a fog lamp, a turn signal lamp, a brake lamp, an emergency lamp, a backup light (a tail lamp), etc. However, implementations are not limited thereto, and the examples and configurations of the present disclosure may be applicable to various types of light projection devices utilized in a vehicle. 
     Various implementations described herein may be implemented in a computer-readable medium, a machine-readable medium, or similar medium using, for example, software, hardware, or any combination thereof. 
     The present disclosure will describe a vehicle lamp as a head lamp configured to facilitate a front view of a vehicle. However, the vehicle lamp of the present disclosure may be implemented as various lamps installed in a vehicle, such as a fog lamp, a tail lamp, a brake lamp, a position lamp, or a turn signal lamp, just to name a few examples. 
     A vehicle may be provided with various vehicle lamps having an illumination function or a signal function. For example, a halogen lamp or a gas discharge lamp may be implemented in some lamps. As another example, a light emitting diode (LED) may be implemented as a light source. 
     LEDs may have several advantages including reduced size and improved economic efficiency owing to a longer lifespan. Although some LEDs are manufactured in the form of a package, in some scenarios an LED is not manufactured in the form of a package, and instead is developed as a semiconductor light emitting diode which converts a current into light to operate as a light source to display electronic devices as well as information technology equipment. 
     However, typical vehicle lamps tend to suffer from a low mass production yield because of implementing LEDs that are manufactured in the form of a package, resulting in high fabrication cost and low flexibility. Further, vehicle lamps implementing LEDs suffer from additional disadvantages, for example, in being unable to generate sufficient optical output amounts, e.g., to satisfy legal or regulatory standards. 
     In some scenarios, vehicle lamps utilize a flexible surface light source implementing semiconductor light emitting diodes that are not necessarily formed in a package. However, such flexible surface light sources suffer from a problem in being unable to generate sufficient optical output amounts, e.g., to satisfy legal or regulatory standards. 
     According to implementations described herein, a vehicle lamp may be provided that utilizes standardized optical modules, that facilitates easy assembly processes, and that generates sufficient optical output. 
     Hereinafter, a structure of the vehicle lamp will be explained with reference to  FIGS. 1 and 2A to 2C . 
       FIG. 1  is an example of a vehicle lamp according to some implementations. 
     The vehicle lamp  100  of the present disclosure may be formed of one or more head lamps. For instance, a vehicle may be provided with a left head lamp and a right head lamp. In this case, the vehicle lamp may be defined as a single assembly including both the left and right head lamps, or may be defined as each of the left head lamp and the right head lamp. 
     A head lamp may include a plurality of optical modules  110 , which may be spaced apart from each other. Each of the optical modules  110  may include the same or similar components disposed in the same or similar manner, such that the optical modules  110  may be easily mass-produced. 
     Each of the optical modules  110  includes a light source unit  112 . The light source unit  112  may include a base substrate and also include a plurality of light emitting diodes disposed on the base substrate. The base substrate may be formed as a single surface, and the plurality of light emitting diodes may be disposed on the base substrate. 
     In some implementations, each optical module  110  may be configured such that the plurality of light emitting diodes are disposed on the base substrate in the form of an array. For instance, the plurality of light emitting diodes may be disposed on the base substrate in the form of matrices, in rows and columns. Alternatively, the plurality of light emitting diodes may be disposed on the base substrate in an irregular pattern, or any suitable pattern. In general, each optical module  110  may be configured with a plurality of light-emitting diodes in any suitable configuration on a base substrate. 
     For each optical module  110 , one or more light emitting diodes in the light source  112  may constitute one or more unit pixels. The light emitting diodes may be turned on and off in units of pixels and/or may have a brightness thereof controlled, e.g., under control of at least one processor such as a controller. As such, each optical module  110  may be individually controlled to generate different outputs of light by controlling the brightness or activation state of different sets of pixels corresponding to different light emitting diodes. 
     In some implementations, a controller may adaptively control each optical module  110  so that the light emitting diodes in the light source  112  generate different outputs. For example, the controller may control each optical module  110  so that the light emitting diodes in the light source  112  output patterns of different shapes, or to output patterns of the same shape with different brightness. 
     Each optical module  110  may implement the light emitting diodes in the light source  112  using any suitable semiconductor-based diode that emits light when activated. Examples of such light emitting diodes include OLEDs, LEDs, micro LEDs, or laser diodes. 
     As such, by controlling the brightness and/or activation state of different light emitting diodes in the light source  112 , each of the optical modules  110  may be configured to generate a particular light distribution pattern or image. For example, in a case where optical modules are disposed in a head lamp, light distribution patterns are generated from the head lamp. 
     The light distribution patterns that are output by the optical modules  110  may represent patterns or images that would be generated, for example, when the light is irradiated onto a screen at a distance from the light source  112 . For example, the light distribution pattern may represent a pattern that would be irradiated onto a screen by the optical module  110  arranged at a predetermined height and predetermined angle. 
     For example, in a state where the optical modules  110  are ‘t’ optical modules are arranged in the head lamp  100 , if all light emitting diodes provided at the ‘t’ optical modules are turned on, then an image or pattern of a largest possible size which can be formed by the head lamp would be displayed on a screen. The image or pattern of a largest possible size which can be formed by the head lamp will be referred to as “a displayable region” of the head lamp. As such, the “displayable region” is the largest possible image or pattern that can be displayed by jointly activating all of the optical modules  110  in the head lamp  100  simultaneously. 
     Therefore, each individual optical module  110  forms only part of the overall displayable region, i.e., only a partial segment of the overall largest possible light distribution pattern. However, the partial segment of the light distribution pattern generated by a single optical module  110  may have insufficient brightness or illumination to satisfy a required light output condition, e.g., as required by legal or regulatory standards. An example of such a scenario is illustrated below with reference to  FIG. 2B . 
     Such problems are addressed by implementations disclosed herein by coordinating a plurality of optical modules  110  to jointly illuminate different segments of the overall light distribution pattern. In some implementations, the plurality of optical modules  110  are grouped into a plurality of groups, and optical modules  110  included in each group are coordinated and controlled to form the same part of the overall light distribution pattern. For example, optical modules  110  included in a first group may be controlled to form a first part of the overall light distribution pattern, and optical modules  110  included in a second group may be controlled to form a second part of the overall light distribution pattern, etc. 
     As such, in a scenario where a light distribution pattern generated from a single optical module  110  has a brightness of ‘x’, and an optical output amount required in the specific part of the light distribution pattern is ‘3x’, the head lamp  100  may control three optical modules  110  to cooperatively illuminate the specific part of the light distribution pattern. In this example, the three optical modules  110  may each be controlled to irradiate the part of the overall light distribution pattern, resulting in a superposition of three such patterns. As the three light distribution patterns are irradiated, the required optical amount of ‘3x’ may be obtained for that part of the overall light distribution pattern. 
     Each of the optical modules  110  may be arranged to have a different angle of emission (e.g., based on a common reference axis), such that the plurality of optical modules  110  included in the same group may irradiate light distribution patterns to be superimposed onto the same location, despite the different optical modules  110  being disposed at different positions on the head lamp  100 . In some implementations, the head lamp  100  may further include a driving unit configured to change a direction that each optical module  110  faces, and the vehicle lamp  100  may control a direction that at least one optical module  110  faces by using the driving unit. 
     In some implementations, each optical module  110  may include pixels formed of ‘m’ columns and ‘n’ rows, and at least one light emitting diode may be disposed at each pixel. In some scenarios, ‘m’ and ‘n’ may be the same natural number. 
     In a state where the pixels are arranged in the form of matrices, if all of the light emitting diodes provided in the optical module  110  are simultaneously activated, then a light distribution pattern may be formed as a matrix shape. For instance, if the matrices of pixels have a square shape, then a resulting light distribution pattern also has a square shape. However, implementations of optical modules  110  disclosed herein are not limited to the square shape of pixels. That is, the light distribution pattern may have various shapes according to an arranged state of the pixels in each optical module  110 . 
     According to an on/off state of the pixels, a shape of the light distribution pattern generated by the optical module  110  may be changed. By controlling the activation of different pixels, the optical modules  110  may generate, for example, characters or symbols, as well as a light distribution patterns of various shapes such as a triangle, a polygon, or a circle. 
     If the optical modules  110  that are included in the same group generate light distribution patterns having the same shape and superimposed on each other, then a required optical output amount may be obtained and a light distribution pattern suitable for a given situation may be generated. 
     Light emitting diodes of optical modules  110  included in the same group may be classified into a first sub-group which forms a low beam region, and a second sub-group which forms a high beam region. If all optical modules  110  included in a first group are activated, then light distribution patterns may generate both high beams and low beams. If only light emitting diodes included in the first sub-group are activated, then light distribution patterns may generate low beams, and if only light emitting diodes included in the second sub-group are activated, then light distribution patterns may generate high beams. As such, high beams and low beams may be selectively generated by a single light emitting optical module  110 . 
     Hereinafter, the aforementioned optical module  110  and a vehicle having the same will be explained in more detail. 
       FIG. 2A  is an example of an implementation of the optical module  110  provided in a vehicle lamp as shown in  FIG. 1 . 
     In this example, the optical module  110  includes a lens  116 , a tunnel  114 , and a light source unit  112 . 
     The light source unit  112  is a light emitting module that generates light and may be, for example, a projection type. In some scenarios, a projection-type light source may be more advantageous than a general clear-type light source in terms of a light distribution effect in collecting light into a single point. Further, in some scenarios, a projection-type light source may have other functional and/or aesthetic advantages. In some implementations, the light source unit  112  may be composed of a discharge bulb, and a light emitting portion which emits light by the discharge bulb. The discharge bulb may be a metal halide bulb, for instance. 
     The light source unit  112  may include a plurality of light emitting diodes disposed on a single base substrate. The plurality of light emitting diodes of the light source unit  112  may be individually turned on/off, and each diode may output light of a different brightness when turned on. As such, the optical module  110  may output an image of a different shape by controlling the plurality of light emitting diodes. 
     Hereinafter, the light source which can output an image of a different shape will be referred to as displayable light source, i.e., ‘display light source’. 
     The tunnel  114  is configured to guide light generated from the light source unit  112  to one opening. For example, the tunnel  114  may guide light that is emitted from the light source unit  112  toward a desired position by utilizing reflection. In some implementations, the light emitted from the light source unit  112  may be directly transmitted to the opening of the tunnel  114 , without being reflected by the tunnel  114 . 
     The light source unit  112  may be provided at the tunnel  114  on an opposite side (light incidence portion′) to the opening (light emission portion′). The light source unit  112  may be provided inside or outside the tunnel  114 . If the light source unit  112  is provided outside the tunnel  114 , the light incidence portion may be also implemented in the form of the opening, or the light incidence portion may be partially or entirely blocked by a light transmittance material. 
     The lens  116  may be configured to project light that is emitted from the light emission portion, i.e., the opening of the tunnel  114 . The lens  116  may be configured to transmit light that is emitted from the light source unit  112  in a forward direction by utilizing refraction. For example, the lens  116  may have a focal point in the form of a convex lens or a concave lens. 
     The example of  FIG. 2A  illustrates the tunnel  114  having a quadrangular pyramid shape, and the lens  116  contacting the light emission portion also having a quadrangular sectional shape. However, this is merely an example, and the tunnel  114  and/or the lens  116  may have any suitable shape. For example, the tunnel  114  may have a conical shape, as well as a poly-pyramid shape such as a triangular pyramid shape or a pentagonal pyramid shape. 
       FIG. 2B  illustrates a partial light distribution pattern generated by the optical module  110  shown in  FIG. 2A . 
     Each of a plurality of optical modules  110  included in the vehicle lamp  100  forms a partial light distribution pattern, and a plurality of partial light distribution patterns are superimposed to form a single entire light distribution pattern. 
     The light distribution pattern refers to a spatial distribution of a lighting generated by a light source. The light distribution pattern may represent an image that would be formed on a screen (e.g., a wall surface) by the vehicle lamp. That is, the light distribution pattern may be defined as an image that would be formed on a screen when the vehicle lamp emits light at a position spaced from the screen by a predetermined distance. 
     If a single optical module  110  includes a plurality of light emitting diodes, then various partial light distribution patterns may be formed by the optical module  110 . For instance, if the optical module  110  is formed of ‘M×N’ pixels, then various partial light distribution patterns may be formed as the light emitting diodes are activated in units of the pixels, or as a brightness of the light emitting diodes is changed in units of the pixels. Here, ‘M’ and ‘N’ are natural numbers. 
       FIG. 2C  illustrates an example of an entire light distribution pattern generated by the plurality of optical modules  110  included in the vehicle lamp  100  shown in  FIG. 1 . 
     Referring to  FIG. 2C , the vehicle lamp  100  may include a first lamp  210 , a second lamp  220 , a memory  240 , and at least one processor, such as controller  230 . Each of the first and second lamps  210 ,  220  may include a plurality of optical modules (e.g., optical modules  110  of  FIG. 1 ). The first lamp  210  may be referred to as a first head lamp, and the second lamp  220  may be referred to as a second head lamp. 
     Each of the first lamp  210  and second lamp  220  may have a plurality of optical modules (e.g., a plurality of optical modules  110  of  FIG. 1 ). Furthermore, each optical module  110  may control a particular portion of the light distribution pattern to be illuminated, or alternatively, the plurality of optical modules  110  may jointly control the entire light distribution pattern. 
     For example, each optical module  110  in the first and second lamps  210 ,  220  may control different pixels to output different types of light distribution patterns. As such, the vehicle lamp may be configured to generate different light distribution patterns via adaptive activation of pixels, rather than by implementing a physical display shield. Accordingly, the vehicle lamp  100  may have a simplified structure, a space occupied by the vehicle lamp in a vehicle may be reduced, and the fabrication cost may be reduced. 
     In some implementations, the control of the optical modules  110  may be controlled by an adaptive driver assistance system (e.g., an ADAS) so that the light distribution pattern is controlled based on a state of the vehicle, such as an incline of the vehicle or a geographic region. As such, the head lamp  100  may be adaptively controlled to shine different light distribution patterns of light in different locations adaptively. 
     Although examples described herein implement a plurality of optical modules  110  that cooperatively generate a light distribution pattern, in some implementations a single optical module  110  may be implemented. In such scenarios, the single optical module  110  may implement numerous controllable light emitting diodes, and may generate different light distribution patterns by controlling the different diodes, for example, to generate multiple superimposed segments of patterns as described herein. 
     The memory  240  may be configured to store data related to various functions of the vehicle lamp  100 . For example, the memory  240  may store a plurality of application programs (or applications) driven in the vehicle lamp  100 , and data and commands (e.g., instruction words) for an operation of the vehicle lamp  100 . At least part of the application programs may be downloaded from an external server through wireless communication. The application programs may be stored in the memory  240 , and may be installed on the vehicle lamp  100  so as to execute an operation (e.g., functions) of the vehicle under control of the controller  230 . 
     The controller  230  may control one or more functions of the vehicle lamp  100 , as well as functions related to the application programs. The controller  230  may process signals, data, information, etc. input or output through the aforementioned components, or may drive the application programs stored in the memory  240 , thereby providing proper information or a proper function to a user. 
     The controller  230  may control at least one of the first and second lamps  210 ,  220  based on information stored in the memory  240 . For example, the memory  240  may store information about different types of overall light distribution patterns as well as information about partial light distribution patterns that comprise each overall light distribution pattern. The controller  230  may control each optical module  110  based on the information stored in the memory  240 . 
     An overall light distribution pattern, generated when all of light emitting diodes provided at the vehicle lamp  100  are turned on, is referred to herein as a displayable region  290 , as illustrated in  FIG. 2C . That is, the displayable region  290  may refer to a pattern having a largest possible size which can be generated by the vehicle lamp  100 . 
       FIG. 2C  illustrates an example where the displayable region  290  has a rectangular shape. However, the shape and the size of the displayable region  290  may be changed variously according to different implementations. 
     Each light emitting diode corresponds to part of the displayable region  290 . For example, the displayable region  290  may correspond to a plurality of pixels, and each of the pixels may correspond to one or more light emitting diodes. 
     A pixel may refer to one or more light emitting diodes that generates part of the overall displayable region  290 . 
     As individual pixels are turned on and off, different light distribution patterns of the vehicle lamp  100  are generated. In this case, each optical module  110  forms a partial light distribution pattern, i.e., part of the entire light distribution pattern. 
     For instance, in the example of  FIG. 2C , a light source unit  211  of a first optical module provided in the first lamp  210  may correspond to a first part  292  of the displayable region  290 . The light source units  219   a ,  219   b  of a second optical module provided in the first lamp  210  may correspond to second parts  294   a ,  294   b  of the displayable region  290 . 
     A different partial light distribution pattern may be formed at the first part  292  according to an operation of the first optical module, and a different partial light distribution pattern may be formed at the second parts  294   a ,  294   b  according to an operation of the second optical module. 
     The displayable region  290  may be partitioned into a low beam region and a high beam region based on, for example, a height from a ground surface. Light emitting diodes included in a single optical module may be grouped into diodes which output high beams, and grouped into diodes which output low beams. As such, unlike configurations that utilize different optical modules to output high and low beams, implementations disclosed herein may implement a single optical module that adaptively outputs both high beams and low beams. As such, in some scenarios, implementations disclosed herein may provide a vehicle lamp that has a simplified structure, and may reduce the fabrication cost. 
     Hereinafter, description will be given of generating an optical output which satisfies an output condition (e.g., an output condition according to a legal or regulatory standard) for light distribution of a vehicle by using a display light source. 
     The vehicle lamp includes a first lamp (e.g., a left head lamp) which forms a first partial light distribution pattern, and a second lamp (e.g., a right head lamp) which forms a second partial light distribution pattern. An entire light distribution pattern may be composed by the superposition of the first and second partial light distribution patterns. 
     The superposition of the first and second partial light distribution patterns may be a superposition of overlapping or non-overlapping partial patterns. As such, the entire light distribution pattern may be generated by an overlapped irradiation type in which the first and second lamps generate partial patterns in an overlapped manner, or a non-overlapped (divided) irradiation type in which the first and second lamps generate partial patterns in a non-overlapped (divided) manner. 
       FIGS. 3A to 3D  illustrate examples of generating an entire light distribution pattern in a non-overlapped (divided) irradiation manner by the first and second lamps included in the vehicle lamp. 
     In this example of the divided irradiation manner, an entire light distribution pattern is divided into a first region (A) and a second region (B) on the basis of a reference line  310 . More specifically, as shown in  FIG. 3B , a first light distribution pattern formed by the first lamp  210  is output to the left side of the reference line  310 , and a second light distribution pattern formed by the second lamp  220  is output to the right side of the reference line  310 . 
     In case of the divided irradiation manner, the first and second light distribution patterns are not overlapped with each other. Each optical module included in the first lamp forms a different part of the first partial light distribution pattern, and each optical module included in the second lamp forms a different part of the second partial light distribution pattern. Accordingly, when one of the first and second lamps malfunctions, a driver may immediately recognize the malfunctioned lamp. 
     The reference line  310  may be adaptively moved to the left or to the right, and may be adjusted to an oblique line rather than a vertical line according to a driving situation. 
     For instance, the reference line  310  may be moved based on a steering angle of a steering wheel provided at the vehicle. More specifically, the controller  230  may move the reference line  310  based on the steering angle. For instance, when the vehicle takes a right turn, a driver&#39;s eyeline is toward the right side on the basis of a driving direction. In this case, as shown in  FIG. 3C , the controller may control the reference line  310  to move to the right, such that the second lamp  220  disposed on the right side may much irradiate the right side on the basis of the driving direction. The moving direction and the moving degree of the reference line  310  may be changed according to a steering angle. 
     Specific optical modules (e.g., optical modules  110  of  FIG. 1 ) may irradiate light onto the same region so as to achieve sufficient optical output amount (e.g., to satisfy a legal or regulatory standard). 
     As an example, among the light emitting diodes included in the plurality of optical modules (e.g., optical modules  110  of  FIG. 1 ), light emitting diodes included in a first group may form a first part of a light distribution pattern, and light emitting diodes included in a second group may form a second part of the light distribution pattern. In this case, the light emitting diodes included in the first group may be disposed on a base substrate of a different optical module among the plurality of optical modules  110 . 
     For instance, as shown in the example of  FIG. 3D , light emitting diodes  211   a  included in a first group among light emitting diodes of a first optical module, and light emitting diodes  213   a  included in a first group among light emitting diodes of a second optical module may irradiate light to a first part  292   a  of the displayable region. Light emitting diodes  211   b  included in a second group among the light emitting diodes of the first optical module, and light emitting diodes  213   b  included in a second group among light emitting diodes of a second optical module may irradiate light to a second part  292   b  of the displayable region. With such a configuration, the amount of light irradiated onto the first and second parts  292   a ,  292   b  may be increased by such overlapping. 
     A resolution of the lamp may be controlled by controlling the number of optical modules which irradiate light onto the same region. For instance, when three optical modules of ‘M×N’ pixels irradiate light onto the same region, a resolution of ‘M×N×3’ may be obtained. 
     In some implementations, the first part formed by light emitting diodes included in the first group may be included in the low beam region, and the second part formed by light emitting diodes included in the second group may be included in the high beam region. For instance, in optical modules having ‘M×N’ pixels, rows of 1 to t may implement high beams, and rows of (t+1) to M may implement low beams. With such a configuration, a single optical module may implement high and low beams. 
     For generation of the first part  292   a , each of the light emitting diodes included in the first group may be formed to have a different angle between its direction and a reference direction. For instance, the light emitting diodes  211   a  arranged at the first optical module included in the first group, and the light emitting diodes  213   a  arranged at the second optical module included in the first group have different angles on the basis of one direction, thereby irradiating light onto the first part  292   a.    
     In some implementations, the base substrate may be a curved surface that at least part thereof is bent or curved, such that light emitting diodes arranged on the base substrate have different angles on the basis of one direction. For example, a display light source may be flexible that can be bent, curved, twisted, folded, and rolled by an external force. 
     Accordingly, different partial light distribution patterns may be generated by adaptively bending the base substrate according to a position where different optical modules are arranged. As such, the head lamp for a vehicle may be more efficiently implemented by standardized optical modules (e.g., optical modules  110  of  FIG. 1 ). 
     In some implementations, the optical modules  110  may further include a driving unit configured to change a direction that each of light emitting diodes included in the optical modules faces. For example, in a case where the reference line is moved laterally, the driving unit may apply an external force to the base substrate to achieve a bent state or a flat state of the base substrate, such that an entire light distribution pattern may be moved along the reference line. 
     One or more processors (e.g., controller  230  of  FIG. 2C ) may select a light distribution pattern, and may control the light emitting diodes such that the selected light distribution pattern is formed. For example, the controller may control the optical modules  110  such that light emitting diodes which form the selected light distribution pattern are turned on, and such that light emitting diodes which do not form the selected light distribution pattern are turned off. Thus, light emitting diodes to be turned off may be selectively changed according to the selected light distribution pattern. 
       FIGS. 4A to 4C  illustrate examples of generating an entire light distribution pattern in an overlapped irradiation manner by first and second lamps included in a vehicle lamp. 
     As shown in  FIG. 4B , unlike the divided irradiation manner of  FIGS. 3A to 3D , the overlapped irradiation manner may be implemented such that a first partial light distribution pattern generated by the first lamp  210  and a second partial light distribution pattern generated by the second lamp  220  may have the same shape. 
     As shown in  FIG. 4A , the overlapped irradiation manner may be implemented such that overlapping may occur only on a region between a first reference line  410  generated by the first lamp and a second reference line  412  generated by the second lamp. 
     In a case where a first partial light distribution pattern generated by the first lamp  210  and a second partial light distribution pattern generated by the second lamp  220  are partially overlapped with each other, the controller may control the light emitting diodes such that an optical amount of an entire light distribution pattern may become constant. 
     In a scenario where a non-overlapped region is formed by a single light emitting diode, an overlapped region is formed by two light emitting diodes. If a plurality of light emitting diodes emit light with the same brightness, the overlapped region becomes brighter than the non-overlapped region. 
     In order for an entire light distribution pattern to have a constant optical amount, the controller distinguishes light emitting diodes corresponding to an overlapped region between the first and second partial light distribution patterns, from light emitting diodes corresponding to a non-overlapped region between the first and second partial light distribution patterns. Then, the controller controls a brightness of the light emitting diodes corresponding to the overlapped region, to be different from a brightness of the light emitting diodes corresponding to the non-overlapped region. For instance, when light emitted from the light emitting diodes corresponding to the non-overlapped region has a brightness of ‘x’, light emitted from the light emitting diodes corresponding to the overlapped region may have a brightness of ‘x/2’. 
       FIG. 4C  illustrates an example of an overlapped irradiation method. A light source unit  211  included in a first optical module of the first lamp  210  may irradiate light to the first part  292   a  of the displayable region  290 . A light source unit  221  included in a first optical module of the second first lamp  210  may irradiate light to the first part  292   a  of the displayable region. As the optical modules included in the different lamps irradiate light onto the same region, an increased optical output amount may be achieved. 
     In case of the overlapped irradiation method, even if one of the two lamps malfunctions, a driver&#39;s view may be obtained by using another of the two lamps. 
     Hereinafter, a structure of the vehicle lamp using a display light source will be explained in more detail. 
       FIGS. 5A to 5F  illustrate examples of a sectional surface of a vehicle lamp  510  taken along line ‘A-A’, which illustrate various structures of the vehicle lamp according to the present disclosure. 
     A light source may include a single base substrate and a plurality of light emitting diodes disposed on the base substrate. The light emitting diodes may be individually turned on/off, and may generate light distribution patterns of different shapes under control of the controller. 
     The optical module having a display light source may be also applicable to a non-projection type lamp (i.e., a clear type), as well as a projection type lamp. 
       FIG. 5B  illustrates a sectional surface of the projection type of vehicle lamp  510  to which a reflector has been applied. 
     The projection type of vehicle lamp  510  to which a reflector has been applied may include a low beam light source  511 , a high beam light source  512 , a low beam reflector  513 , a high beam reflector  514 , a shield  515 , a projection lens  516 , and an outer lens  517 . 
     In this example, the low beam light source  511  and the high beam light source  512  are positioned at an upper side and a lower side on the basis of an optical axis (Ax) of the vehicle lamp  510 , respectively. However, implementations are not limited to this, and the position of the low beam light source  511  and the high beam light source  512  may be variously changed according to a configuration of the vehicle lamp  510 , a beam pattern, etc. 
     The low beam reflector  513  is positioned in a light emission direction of the low beam light source  511 , and the high beam reflector  514  is positioned in a light emission direction of the high beam light source  512 . 
     The low beam reflector  513 , positioned above the low beam light source  511 , may have a reflection surface on an inner side surface thereof. The reflection surface is deposited with a material having a high reflectivity such as aluminum, such that light upward-emitted from the low beam light source  511  is reflected to a front side. 
     In this example, the low beam reflector  513  of an oval shape has two focal points. One of the two focal points is positioned to correspond to an installation position of the low beam light source  511 , and another of them is positioned near a cut-off edge of the shield  515 , as explained below. Hereinafter, the focal point positioned near the cut-off edge of the shield  515  will be referred to as a first focal point (F 1 ). 
     The low beam reflector  513  collects light emitted from the low beam light source  511  to the first focal point (F 1 ), due to an optical characteristic of an oval reflector. 
     In some implementations, the shield  515  may have an approximate plate shape, and may include a cut-off edge formed to be backward concaved at a front end thereof. 
     Light emitted from the low beam light source  511  is reflected by the low beam reflector  513  to thus be collected to the first focal point (F 1 ). Then, one part of the light collected to the first focal point (F 1 ) is shielded by the cut-off edge, and another part thereof is incident onto the projection lens  516  via the first focal point (F 1 ). 
     The light incident onto the projection lens  516  via the first focal point (F 1 ) has a low beam pattern having a cut-off line by the cut-off edge. 
     A base substrate of the low beam light source  511  has a planar surface, and light emitted from each light emitting diode is made to be irradiated onto a desired region by the low beam reflector  513 . 
     The outer lens  517  is configured to divide the vehicle lamp into the inside and the outside, and to protect the inside of the vehicle lamp from foreign materials. 
       FIG. 5C  illustrates a sectional surface of a projection type of vehicle lamp  520  to which no reflector has been applied. 
     The projection type of vehicle lamp  520  to which no reflector has been applied may include a light source  521 , a shield  525 , a projection lens  523  and an outer lens  524 . 
     In this case, at least part of the light source  521  may form a low beam pattern, and part of the remaining light sources may form a high beam pattern. The low beam pattern forms a cut-off line by the shield  525 . 
     A bezel portion may be disposed between the projection lens  523  and the light source  521 , and the bezel portion may serve as a tunnel. 
       FIG. 5D  illustrates a sectional surface of a clear type of vehicle lamp  530  to which a reflector has been applied. 
     The clear type of vehicle lamp  530  to which a reflector has been applied may include a low beam light source  531 , a high beam light source  532 , a low beam reflector  533 , a high beam reflector  534 , and an outer lens  535 . 
     The low beam light source  531  is disposed to be towards the upper side on the basis of an optical axis, and light emitted from the low beam light source  531  is refracted to a different direction by the low beam reflector  533  to form a low beam pattern. 
     The high beam light source  532  is disposed to be towards a lower side on the basis of the optical axis, and light emitted from the high beam light source  532  is refracted to a different direction by the high beam reflector  534  to form a high beam pattern. 
       FIG. 5E  illustrates a sectional surface of a clear type of vehicle lamp  540  to which no reflector has been applied. 
     The clear type of vehicle lamp  540  to which no reflector has been applied may include a display light source  541  and an outer lens  542 . In this case, the display light source  541  may be checked through the outer lens  542 . 
     A vehicle lamp, to which a reflector has been applied, has a base substrate formed to have a planar surface, since light is refracted by the reflector. In this case, each light emitting diode may have the same angle between its direction and a reference direction. 
     In case of the vehicle lamp to which no reflector has been applied, light emitted from the display light source is directly irradiated to form a light distribution pattern. In this case, each light emitting diode may have a different angle between its direction and a reference direction, such that a predetermined light distribution pattern may be generated. 
       FIG. 5F  illustrates a sectional surface of a vehicle lamp having a flexible light source. 
     In case of the vehicle lamp to which no reflector has been applied, since each light emitting diode may have a different angle between its direction and a reference direction, a base substrate may be formed to be flexible. 
     In some implementations, a base substrate of the display light source  511  may be formed such that at least part thereof may be bent. The flexible display light source  511  will be explained with reference to  FIGS. 11 and 12 . 
     Implementations related to a control method by the aforementioned vehicle lamp will be explained in more detail with reference to the attached drawings. 
     The following control method may be executed by the aforementioned vehicle lamp or a vehicle having the aforementioned vehicle lamp. 
       FIG. 6  is a flowchart illustrating an example of controlling the vehicle lamp. 
     The vehicle lamp includes a plurality of optical modules spaced apart from each other. And each optical module includes a base substrate, and a plurality of light emitting diodes disposed on the base substrate and turned on/off individually. The vehicle lamp may turn on some of the plurality of light emitting diodes and turn off the others, such that a preset light distribution pattern may be formed. 
     The vehicle lamp or a vehicle provided with the vehicle lamp may select one of a plurality of preset light distribution patterns, based on a driving situation (S 610 ). 
     In order to sense the driving situation, the vehicle lamp or the vehicle may be provided with a sensor for sensing driving information of the vehicle. If the sensor is provided at the vehicle, the vehicle lamp may select one light distribution pattern based on information received from the sensor. 
     The driving information may include various types of information related to the vehicle and/or sensed by the sensor. 
     The driving information may include driving-related information sensed at the vehicle and/or at the periphery of the vehicle, such as a steering angle of a steering wheel, a driving direction of the vehicle, a driving speed, a weight, a road characteristic (a road type such as an unpaved road, a highway and a crossroad, a curvature at a curved section, a limit speed of a road, etc.), a brightness outside the vehicle, a weather situation, and an angle between an axis which connects one end and another end of the vehicle on the basis of a driving direction and a gravitational direction. 
     The driving information may include position information of the vehicle such as GPS information, navigation information, various types of information analyzed from an image captured by an image sensor, and information about an object sensed by radar or lidar (laser radar) and a probability to collide with the object. 
     The vehicle lamp and/or the vehicle may further include a memory configured to store information about a plurality of light distribution patterns. The memory may store therein database on a type of a light distribution pattern, coordinate values of light emitting diodes to be turned on/off in order to output the light distribution pattern, and a condition to output the light distribution pattern. 
     The database may be stored by a manufacturing company when the product is presented to the market, and may be edited or updated by a manufacturing company and/or a purchaser after the product is presented to the market. The vehicle lamp or the vehicle may be provided with a wireless communication unit, and may update the database when information is received from a preset server. 
     Then, the vehicle lamp may control an on/off state of each light emitting diode provided on the base substrate such that a selected light distribution pattern may be formed (S 630 ). 
     Once the light distribution pattern is selected, light emitting diodes to be turned on and light emitting diodes to be turned off are distinguished from each other such that the selected light distribution pattern is implemented. Even light emitting diodes disposed at the same optical module may be turned on or off according to the selected light distribution pattern. 
     When a driving situation is changed while the vehicle is driving, the selected light distribution pattern may be changed into a second light distribution pattern from a first light distribution pattern. In this case, the vehicle lamp controls an on/off state of each light emitting diode such that the second light distribution pattern is formed. More specifically, light emitting diodes included in the first and second light distribution patterns maintain an on state. And light emitting diodes included only in the first light distribution pattern are converted into an ‘off’ state from an ‘on’ state, and light emitting diodes included only in the second light distribution pattern are converted into an ‘on’ state from an ‘off’ state. 
     In the case where the first light distribution pattern is changed into the second light distribution pattern, for a stable change of a driver&#39;s view, the light emitting diodes included only in the first light distribution pattern may become dark gradually for a predetermined time, and then may be turned off when the predetermined time lapses. For safety, the light emitting diodes included only in the second light distribution pattern may be immediately turned on when the conversion is executed. 
     As the selected light distribution pattern is changed, a cut-off line may be changed. 
     Hereinafter, implementations to change a light distribution pattern based on driving information will be explained in more detail with reference to  FIGS. 7 to 9B . 
       FIG. 7  illustrates an example of controlling a vehicle lamp to generate a light distribution pattern that satisfies a given condition (e.g., a condition established by a legal or regulatory standard). 
     Some vehicle lamps are produced according to particular laws or regulations. For example, different laws or regulations may establish different cut-off lines based on whether a driver&#39;s seat is positioned on the left or on the right of the vehicle (e.g., based on whether an oncoming vehicle would be located on the left or right side of the vehicle). As such, vehicle lamps are typically manufactured in different manners based on the applicable standards or requirements. 
     Implementations disclosed herein may alleviate such inefficiencies by providing a single type of vehicle lamp that may be adaptively controlled to achieve different output patterns. As such, a vehicle lamp may be manufactured in a common manner to be utilized in different countries and under different scenarios. 
     Further, in some implementations, a vehicle lamp may implement a memory that stores different light distribution patterns, e.g., according to different standards or requirements. For example, the vehicle lamp may selectively output a light distribution pattern corresponding to a particular country based on a geo-location of the vehicle. For instance, as shown in  FIG. 7 , when the vehicle provided with the vehicle lamp is located in a country with a left-hand side driving standard, the vehicle lamp may output a light distribution pattern  710  corresponding to a left-hand side driver. Then, if the vehicle provided with the vehicle lamp moves to another location that requires a right-hand driving standard, the vehicle lamp may output a light distribution pattern  720  corresponding to a right-hand driver. 
     Each light emitting diode is turned on/off according to a selected light distribution pattern, and a cut-off line (CL) is changed according to the selected light distribution pattern. 
     As such, a vehicle lamp may be developed under a single common specification, and the fabrication cost may be reduced, and a driver may use the vehicle in various countries. 
       FIGS. 8A and 8B  illustrate examples of changing a light distribution pattern and/or a cut off line, based on driving information of the vehicle. 
     Referring to  FIG. 8A , a cut-off line (CL) may be adaptively moved up and down based on driving information, and a light distribution pattern may be correspondingly changed (e.g., from  810  to  820 ). 
     For instance, the cut-off line (CL) may be moved up and down according to an angle formed between a vehicle axis (one axis extending from the front side to the rear side of the vehicle) and a horizontal line (or a gravitational direction). As another example, the cut-off line (CL) may be moved up and down according to a height of a center of a camera disposed to face the front side of the vehicle, the height sensed from a ground surface. 
     As such, an auto leveling may be executed according to an on/off state of each light emitting diode. In this case, the light distribution pattern may be adaptively controlled according to a change of a road surface, a change of a weight of the vehicle, etc. 
     When a front end of the vehicle becomes higher than a rear end of the vehicle, a direction of the vehicle lamp also becomes higher than a horizontal line. In this case, if the cut-off line (CL) is maintained, a driver of an oncoming car may be disturbed even by low beams generated from the vehicle lamp. Accordingly, the vehicle lamp may change the cut-off line (CL) based on an angle between the vehicle axis and the horizontal line. In this case, a height of the cut-off line based on the horizontal line is changed. 
     Some vehicle lamps may implement an aiming operation using a motor, etc., in order to move a cut-off line (CL). However, the vehicle lamp of the present disclosure may move the cut-off line (CL) by individually turning on/off light emitting diodes included in the display light source. In this case, a motor or other driving unit may not be required, and the vehicle lamp may have a simplified structure and the fabrication cost may be reduced. 
     As shown in  FIG. 8B , a selected light distribution pattern may be changed based on at least one of a steering angle of a steering wheel provided at the vehicle, and a road characteristic. The light distribution pattern may be also changed according to whether there is an oncoming car, a road type, a roadway radius of curvature, etc., and light emitting diodes to be turned on or off are changed accordingly. 
       FIGS. 9A and 9B  illustrate examples of changing a light distribution pattern according to an object sensed from the front side. 
     When an object is sensed from a front side to which a light distribution pattern is irradiated, the light distribution pattern may be changed, or light emitting diodes which form a partial region of the light distribution pattern may be controlled such that the partial region corresponding to the object may have a brightness smaller than a predetermined value. 
     For instance, as shown in  FIG. 9A , when there is a median strip  910  on the left or right on the basis of a driving direction, light needs not be irradiated onto a partial region  920  of a light distribution pattern, the partial region corresponding to the median strip  910 . For prevention of unnecessary power consumption, the controller may turn off at least one of light emitting diodes which form the partial region  920 , or may reduce a brightness of said at least one light emitting diode. 
     As another example, as shown in  FIG. 9B , upon sensing of an oncoming car  930  and/or a pedestrian  940  who is staring at the vehicle, light emitting diodes which form a first region  932  corresponding to the oncoming car  930  and/or a second region  942  corresponding to the pedestrian  940  may be controlled to have brightness values smaller than predetermined values. Accordingly, a driver of the oncoming car  930  or the pedestrian  940  may move without glare. 
     The vehicle lamp of the present disclosure may control a light distribution pattern to have a different brightness, by turning on/off each light emitting diode or by controlling a brightness of each light emitting diode. 
       FIGS. 10 and 11  illustrate examples of generating a brightness difference at a light distribution pattern. 
     Firstly, the vehicle lamp or the vehicle determines whether a preset condition is satisfied (S 1010 ). The preset condition may include a condition set to change a brightness of at least part of a light distribution pattern while the light distribution pattern is maintained. For instance, the preset condition may be satisfied when an oncoming car or a pedestrian appears at a predetermined space where a light distribution pattern is irradiated, or when a light distribution pattern of the vehicle is overlapped with a light distribution pattern of another vehicle. 
     If the preset condition is satisfied, the vehicle lamp controls light emitting diodes such that a first part and a second part of the light distribution pattern have different optical amounts (or brightness values) (S 1030 ). 
     More specifically, the vehicle lamp may control the first part to have an optical amount different from that of the second part, using light emitting diodes included in a first group corresponding to the first part. 
     Here, the first part may be generated by a first optical module among optical modules included in the vehicle lamp  100 , and the second part may be generated by a second optical module among the optical modules included in the vehicle lamp  100 . Alternatively, the first part may be generated by light emitting diodes included in a first LED group among a plurality of light emitting diodes included in the same optical module, and the second part may be generated by light emitting diodes included in a second LED group among the plurality of light emitting diodes included in the same optical module. 
     For instance, if the first part is overlapped with a light distribution pattern of another vehicle, the second part may not be overlapped with the light distribution pattern of said another vehicle. If an irradiation space of the first part is sufficiently bright by light emitted from the another vehicle, then the vehicle lamp may control the light emitting diodes such that the first part becomes darker than the second part. As such, among an entire region of a light distribution pattern, a brightness of a different region may be controlled according to a preset condition. In this case, the preset condition may be an external brightness of the vehicle (e.g., irradiation from another vehicle). 
     For instance, in a case where first and second light emitting diodes form the first part and third and fourth light emitting diodes form the second part, at least one of the first and second light emitting diodes may be turned off such that the first part may become darker than the second part. That is, an optical amount of the first part may be controlled by turning off at least one of the light emitting diodes which form the first part. 
     Alternatively, the first part may be controlled to have a low brightness than the second part, by controlling at least one of the first and second light emitting diodes to have a lower brightness than the third and fourth light emitting diodes. That is, an optical amount of the first part may be controlled by differently controlling a brightness of each of the light emitting diodes which form the first part. 
     As shown in  FIG. 11 , the light emitting diodes may be controlled such that a light distribution pattern may have a gradation. As each of the light emitting diodes has its brightness changed, different regions of the light distribution pattern become brighter or darker gradually with continuity. This may allow a driver to obtain a front view more easily. 
       FIGS. 12 and 13  illustrate examples of a light source provided in the vehicle lamp  100 . 
     The vehicle lamp  100  according to some implementations includes a frame fixed to a vehicle body, and a light source unit  1100  installed at the frame. 
     Electric lines for supplying power to the light source unit  1100  are connected to the frame, and the frame may be fixed to the vehicle body directly or through a bracket. As shown, a lens unit may be provided such that light emitted from the light source unit  1100  may be more distributed and may become clearer. 
     The light source unit  1100  may be a flexible light source unit which can be bent, curved, twisted, folded and rolled by an external force. 
     When the light source unit  1100  is not bent (for example, in a state with an infinite radius of curvature and referred to as a first state), the light source unit  1100  has a flat surface. When the light source unit  1100  is bent from the first state by an external force (for example, a state with a finite radius of curvature and referred to as a second state), the light source unit  1100  has a curved surface or a bent surface. 
     Pixels of the light source unit  1100  may be implemented by semiconductor light emitting diodes. For example, the semiconductor light emitting diodes for converting a current into light may be implemented as light emitting diodes (LEDs). The light emitting diodes may be formed to have a small size to serve as the pixels even in the second state. 
       FIGS. 12 and 13  illustrate an example in which a passive matrix (PM) type of semiconductor light emitting diodes are used for the light source unit  1100 . However, the following descriptions may be also applicable to active matrix (AM) type of semiconductor light emitting diodes. 
     The light source unit  1100  includes a base substrate  1110 , a first electrode  1120 , an adhesion layer  1130 , a second electrode  1140 , and a plurality of semiconductor light emitting diodes  1150 . 
     The base substrate  1110  is a base layer having a structure formed through entire processes, and may be a wire substrate where the first electrode  1120  is arranged. 
     The first electrode  1120  is positioned on the base substrate  1110 , and may be formed as a surface type electrode. Thus, the first electrode  1120  may be an electrode layer disposed on the base substrate, and may serve as a data electrode. 
     The adhesion layer  1130  is formed on the base substrate  1110  where the first electrode  1120  is positioned. 
     The adhesion layer  1130  may be a layer having an adhesive property and a conductivity, and a conductive material and an adhesive material may be mixed with each other at the adhesion layer  1130 . Thus, the adhesion layer  1130  may be referred to as a conductive adhesion layer. And the adhesion layer  1130  has flexibility, which allows the light source unit to have a flexible function. 
     For instance, the adhesion layer  1130  may be an anisotropy conductive film (ACF), an anisotropy conductive paste, a solution containing conductive particles, etc. The adhesion layer  1130  allows an electric reciprocal connection in a Z-direction which penetrates the adhesion layer  1130 , but may be a layer having an electrical insulation property in an X-Y direction (a horizontal direction). Thus, the adhesion layer  1130  may be referred to as a Z-axis conductive layer. 
     After positioning the first electrode  1120  on the base substrate  1110 , e.g., after positioning an anisotropy conductive film on the base substrate  1110 , if the semiconductor light emitting diodes  1150  are connected to the first electrode  1120  by applying heat and a pressure, the semiconductor light emitting diodes  1150  are electrically connected to the first electrode  1120 . In this case, the semiconductor light emitting diodes  1150  are preferably positioned on the first electrode  1120 . Since the anisotropy conductive film contains an adhesive ingredient, the adhesion layer  1130  implements a mechanical coupling between the semiconductor light emitting diodes  1150  and the first electrode  1120 , as well as an electrical coupling therebetween. 
     The semiconductor light emitting diodes  1150  may constitute a unit pixel even with a small size, due to an excellent brightness thereof. Each of the semiconductor light emitting diodes  1150  may have a size enough for one side thereof to have a length of 80 μm or less than, and may have a rectangular or square shape. In this case, each of the semiconductor light emitting diodes  1150  may have an area of 10-10˜10-5 m 2 , and an interval between the semiconductor light emitting diodes  1150  may be within a range of 100 um˜10 mm. 
     The semiconductor light emitting diodes  1150  may have a vertical structure. 
     The plurality of second electrodes  1140  are positioned between the vertical type of semiconductor light emitting diodes, and the plurality of second electrodes  1140  are electrically connected to the semiconductor light emitting diodes  1150 . 
     The vertical type of semiconductor light emitting diode includes a p-type electrode, a p-type semiconductor layer formed on the p-type electrode, an activation layer formed on the p-type semiconductor layer, an n-type semiconductor layer formed on the activation layer, and an n-type electrode formed on the n-type semiconductor layer. In this case, the p-type electrode disposed at a lower side may be electrically connected to the first electrode by an adhesion layer, and the n-type electrode disposed at an upper side may be electrically connected to the second electrode. In the vertical type of semiconductor light emitting diodes, since the electrodes are disposed up and down, a chip size may be reduced. 
     The plurality of semiconductor light emitting diodes  1150  constitute a light emitting diode array, and an insulation layer  1160  is formed between the plurality of semiconductor light emitting diodes  1150 . For instance, the insulation layer  1160  is formed on one surface of the adhesion layer  1130 , thereby filling a space between the semiconductor light emitting diodes  1150 . 
     However, the present disclosure is not limited to this. That is, only the adhesion layer  1130  without the insulation layer  1160  may be used to fill the space between the semiconductor light emitting diodes  1150 . 
     A phosphor layer  1180  is formed on the light emitting diode array. 
     The phosphor layer  1180  may be formed on one surface of the semiconductor light emitting diodes  1150 . For instance, the semiconductor light emitting diodes  1150  may be blue semiconductor light emitting diodes  1151  which emit blue light (B), and the phosphor layer  1180  may be provided to convert the blue light (B) into light of another color. In this case, the phosphor layer  1180  may be provided with a red phosphor for converting blue light into red light (R), a green phosphor for converting blue light into green light (G), or a yellow phosphor for converting blue light into white light (W). 
     In this case, an optical gap layer  1171  may be disposed between the semiconductor light emitting diodes  1150  and the phosphor layer  1180 . The optical gap layer  1171  may be formed of a material having a small optical absorption rate and an excellent bending characteristic, such as epoxy, acryl, and methyl or phenyl-based silicone. A sheet patterned for optimum light efficiency may be inserted into the optical gap layer  1171 , or particles having different refractive indexes may be mixed with each other at the optical gap layer  1171 . 
     A color filter  1172  may be laminated on the phosphor layer  1180  to enhance a color purity of converted light. And a protection layer  1173  may be formed to cover the color filter  1172  in order to protect the light source unit  1100  from moisture, oxygen and an external impact. In this case, the protection layer  1173  may be implemented as a film is attached onto the color filter  1172 , or as resin coating is executed on the color filter  1172 . 
     In another implementation, the first electrode  1120  (electrode layer) is provided with a common electrode surface  1121  with which each of the light emitting diodes is overlapped, and at least part of the common electrode surface  1121  may be bent. That is, the first electrode  1120  is formed as a surface electrode, and is operated as a common electrode. 
     The common electrode surface  1121  is formed to cover spaces between the semiconductor light emitting diodes  1150 , such that light is reflected between the semiconductor light emitting diodes  1150 . This may allow the electrode layer to have a high-reflection structure, resulting in high light efficiency. 
     The common electrode surface  1121  may be overlapped with 10˜100000 semiconductor light emitting diodes, and the semiconductor light emitting diodes cover the common electrode surface  1121  in the form of an array. 
     For instance, the semiconductor light emitting diodes  1150  may be arranged in the form of matrices, and the common electrode surface  1121  may be overlapped with the semiconductor light emitting diodes  1150  in upper, lower, right and left directions. More specifically, the semiconductor light emitting diodes  1150  may be arranged in rows and columns, and the common electrode surface  1121  may be overlapped with each of the semiconductor light emitting diodes  1150  arranged in rows and columns. 
     As another example, the semiconductor light emitting diodes  1150  may be arranged in an irregular manner, and the common electrode surface  1121  may cover all of the semiconductor light emitting diodes  1150  arranged in an irregular manner. 
     As another example, the electrode layer may be provided with a plurality of unit electrode layers, and each of the unit electrode layers may be provided with a unit common electrode surface formed to have a size corresponding to each of the plurality of semiconductor light emitting diodes. As the unit common electrode surfaces are electrically connected to each other, a surface light source of a large area may be easily implemented. In this case, since optical modules may be formed to have various shapes and sizes and the light source unit may be replaced, the vehicle lamp may be easily repaired and may have a long lifespan. 
     Since the first electrode  1120  is formed as a surface electrode, disconnection which may occur when the common electrode surface  1121  is bent may be attenuated or prevented. More specifically, since the light source unit is attachable to a curved surface or a bent surface of the aforementioned frame, at least part of the common electrode surface  1121  may be bent. In this case, the electrode layer may be provided with one or more grooves  1122 . The groove  1122  may be provided with a crack disposed at the bent part of the common electrode surface  1121 . As the groove is formed at the bent part of the common electrode surface  1121 , an elastic restoration force of the light source unit  1100  becomes weak even if the common electrode surface  1121  is formed of a metallic material. This may allow the light source unit  1100  to be more easily attachable to a curved surface or a bent surface of the frame. Further, since the crack is generated, disconnection of lines does not occur since the first electrode is a surface electrode. 
     The second electrode  1140  is positioned between the semiconductor light emitting diodes  1150 , and is electrically connected to the semiconductor light emitting diodes  1150 . For instance, the semiconductor light emitting diodes  1150  may be arranged in a plurality of columns, and the second electrode  1140  may be positioned between the semiconductor light emitting diodes  1150 . 
     The second electrode  1140  may be formed as a bar type electrode long in one direction. In this case, the second electrode  1140  may be formed to extend along a bending line (BL) of the bent part of the common electrode surface  1121 . For instance, the second electrode  1140  may be formed in parallel to the bending line (BL). In this case, since the second electrode  1140  of a line shape is not bent, inferiority of lines does not occur. That is, an electrode stress may be minimized and occurrence of a crack may be prevented, through the n-type electrode  1152  parallel to the bending line (BL). 
     As shown, the second electrode  1140  and the semiconductor light emitting diode  1150  may be electrically connected to each other by a connection electrode protruded from the second electrode  1140 . For example, the connection electrode may be the n-type electrode  1152  of the semiconductor light emitting diode  1150 . For instance, the n-type electrode  1152  is formed as an ohmic electrode for ohmic contact, and the second electrode  1140  covers at least part of the ohmic electrode by printing or deposition. With such a configuration, the second electrode  1140  may be electrically connected to the n-type electrode  1152  of the semiconductor light emitting diode  1150 . 
     As shown, the second electrode  1140  may be positioned on the insulation layer  1160 . However, the present disclosure is not limited to this. For example, in a case where only the adhesion layer  1130  without the insulation layer  1160  is used to fill a space between the semiconductor light emitting diodes  1150 , the second electrode  1140  may be positioned on the adhesion layer  1130 . 
     As shown, the second electrode  1140  may be integrally formed with the n-type electrode  1152 , and the n-type electrode  1152  of the semiconductor light emitting diode may extend to one surface of the insulation layer  1160 . However, the present disclosure is not limited to this. That is, the second electrode  1140  may be integrally formed with the p-type electrode  1156 . More specifically, the first electrode (electrode layer) may be connected to one of the p-type electrode  1156  and the n-type electrode  1152  of the semiconductor light emitting diode, and another of the p-type electrode  1156  and the n-type electrode  1152  may extend to one surface of the insulation layer  1160 . 
     The insulation layer  1160  may include a first plane  1161  which covers the electrode layer; and a second plane  1162  formed on the opposite side to the first plane  1161 , and having holes through which the semiconductor light emitting diodes are exposed to the outside. In order to extend the second electrode  1140  toward the second plane  1162 , the second plane  1162  may be formed on the same plane as the n-type semiconductor layer  1153  of the semiconductor light emitting diode. 
     As shown, one or more conductors  1141 , not electrically connected to the semiconductor light emitting diodes, may be disposed on one surface of the insulation layer  1160 . The conductor  1141  may be formed at a position where no semiconductor light emitting diode is formed, when the second electrode  1140  is deposited. Thus, the conductor  1141  may be formed of the same material as another of the p-type electrode  1156  and the n-type electrode  1152 . 
     As shown, the insulation layer  1160  may be formed to fill a gap between the conductor  1141  and the electrode layer. In some scenarios, this may help prevent a short-circuit between the conductor  1141  and the electrode layer, and thus, the conductor  1141  and the first electrode  1120  may be mitigated from being short-circuited. 
     In some scenarios, implementations of the vehicle lamp of the present disclosure may have one or more of the following advantages. 
     Firstly, the entire processes may be simplified through the electrode layer having the common electrode surface, and light efficiency may be enhanced since high reflection is executable at the electrode layer. Further, as the common electrode surface is bent, a flexible surface light source, bent in correspondence to a  3 D shape of the vehicle lamp, may be implemented. 
     Further, owing to the common electrode surface, a current supply and a voltage control are facilitated, and an additional structure such as a light guide is not required. Further, lowering of uniform light distribution which may occur from a large surface light source, due to a non-uniform current supply, may be prevented. 
     In the vehicle lamp, a current to be applied to each of light emitting diodes is controlled such that a preset light distribution pattern is formed. This may allow an optical amount corresponding to each part of the light distribution pattern, to be the same as a preset optical amount. 
     Further, since a plurality of electrode layers are provided to form unit surface light sources, a large surface light source may be implemented by assembling the unit surface light sources with each other. Further, as the electrode layer is divided into unit electrode layers, the vehicle lamp may have a long lifespan and may be easily repaired. 
     Further, in the present disclosure, a leakage current due to an inferior semiconductor light emitting diode may be prevented by the insulation layer having a planarized surface. As the planarized surface is used, processes to insulate upper and lower electrodes from each other may be simplified. 
       FIG. 14  is a flowchart illustrating an example of a vehicle lamp updating a light distribution pattern. 
     When information is received from a server, the vehicle lamp or the vehicle may update a light distribution pattern stored in the memory, based on the information received from the server (S 1410 ). 
     For instance, information may be received from the server regarding a change in a light distribution pattern corresponding to a change in a requirement for the patterns (e.g., a change in a legal or regulatory standard for the vehicle lamp). 
     As another example, when the vehicle enters or is scheduled to enter a geographic region not included in a database, the vehicle or the vehicle lamp may request a light distribution pattern corresponding to the geographic region from the server. Then, the server may transmit the requested light distribution pattern corresponding to the geographic region to the vehicle or the vehicle lamp. 
     Then, the vehicle or the vehicle lamp may update the database stored in the memory, based on the received information. 
     The vehicle or the vehicle lamp may control light emitting diodes such that an updated light distribution pattern may be formed (S 1430 ). Light emitting diodes to be turned on or off may be changed according to the updated light distribution pattern. This may allow a driver to be conveniently provided with a proper light distribution pattern. 
       FIG. 15  is a flowchart illustrating an example of controlling the vehicle lamp when one or more light emitting diodes malfunction. 
     The vehicle lamp may sense a malfunction of at least one light emitting diode (S 1510 ). More specifically, the vehicle lamp may be provided with a sensor for detecting a malfunction of at least one light emitting diode, and may detect at least one malfunctioned light emitting diode based on information output from the sensor. The sensor may be a camera for capturing a light distribution pattern, for instance. In a case where a region of an image captured by the camera has a brightness lower than a reference value, the controller may determine that one or more light emitting diodes which form the region have a malfunction. 
     Next, the controller may control the remaining light emitting diodes to replace the malfunctioned light emitting diodes (S 1530 ). 
     A displayable region is divided into a region where a light distribution pattern is irradiated, and a region where the light distribution pattern is not irradiated. Light emitting diodes, which form the region where the light distribution pattern is not irradiated, maintain an off state, unless the light distribution pattern is changed. As the malfunctioned light emitting diodes are compensated for by the remaining light emitting diodes, the head lamp may still achieve a desired output light radiation (e.g., to satisfy a legal or regulatory standard). 
     The controller may change a direction that the remaining light emitting diodes face by using the driving unit provided at the vehicle lamp, such that the remaining light emitting diodes replace the malfunctioned light emitting diodes. 
     While the first lamp forms a first partial light distribution pattern and the second lamp forms a second partial light distribution pattern in a divided irradiation manner, one of the first and second lamps may malfunction. 
     In this case, the vehicle lamp may control another of the first and second lamps to generate an entire light distribution pattern in an overlapped irradiation manner. That is, even if one of the first and second lamps malfunctions, an entire light distribution pattern is generated by another of the first and second lamps. This may provide a view to a driver. 
     The vehicle having the vehicle lamp of the present disclosure may be provided with a display, and a user interface to change a light distribution pattern by using the display may be provided to a driver. 
     The display outputs (displays) information processed by the vehicle and/or the vehicle lamp. For instance, the display may output information about an execution screen of an application program driven by the vehicle, or user interface (UI) and graphic user interface (GUI) information according to the execution screen information. 
     The display may include a touch sensor configured to sense a touch input applied to the display, such that a control command may be input in a touch manner. 
     More specifically, the display may be provided with a touch sensor, and the display and the touch sensor may be operated in a cooperative manner under control of the controller. The display may form a touch screen together with the touch sensor. In this case, the touch screen may function as a user input unit. 
       FIGS. 16 and 17  illustrate examples of a vehicle lamp changing a light distribution pattern according to a user&#39;s input. 
     Referring to  FIG. 16 , a light distribution pattern selection mode may be executed (S 1610 ). 
     The light distribution pattern selection mode may be executed by a user input, or when at least one light emitting diode malfunctions, or when there occurs a driving situation where a light distribution pattern should be changed, or when the driving situation is expected to occur. 
     Once the light distribution pattern selection mode is executed, the vehicle controls the display to display a graphic object corresponding to a current light distribution pattern (S 1630 ). The graphic object may indicate a shape of the selected light distribution pattern, a shape of a cut-off line, whether there exists a malfunctioned light emitting diode, etc. 
     Next, the vehicle may change the selected light distribution pattern based on a user input (S 1650 ). 
     For instance, the display may display one or more changeable light distribution pattern candidates, and the selected light distribution pattern may be changed into another light distribution pattern based on a user input. 
     As another example, the display may display displayable regions in the form of matrices (or a table). In this case, pixels included in a light distribution pattern and pixels not included in the light distribution pattern may be distinguished from each other. That is, the pixels included in the light distribution pattern may be highlighted. 
     As shown in  FIG. 17 , when a touch input is applied to pixels not included in a light distribution pattern, the touched pixels may be added to the light distribution pattern. On the contrary, when a touch input is applied to pixels included in a light distribution pattern, the touched pixels may be excluded from the light distribution pattern. With such a configuration, a driver may generate a desired light distribution pattern. 
     If a light distribution pattern is changed, the vehicle lamp may control an on/off state of the light emitting diodes such that the changed light distribution pattern may be implemented. 
     Implementations of the present disclosure may be implemented as computer-readable codes in a program-recorded medium. The computer-readable medium may include various types of recording devices each storing data readable by a computer system. Examples of such computer-readable media may include hard disk drive (HDD), solid state disk (SSD), silicon disk drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage element and the like. Also, the computer-readable medium may also be implemented as a format of carrier wave (e.g., transmission via an Internet). The computer may include the controller of the vehicle or vehicle lamp. Therefore, it should also be understood that the above-described implementations are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.