Patent Description:
In general, headlights designed in a vehicle are fixedly installed in order to illuminate the front of the vehicle. Upon night driving, the headlights are turned on and secure a driver's view. Recently, the headlights are turned on even in the daytime, and induce safe driving based on vehicle recognition.

However, conventionally, there are problems in that a light source that radiates light has been fixed in the state in which the light source can be recognized from the outside and separate lighting means must be added in order to implement a communication lighting signal, and welcome and goodbye motion lighting, in addition to lighting. Accordingly, there is a need to solve such problems.

The background of the present invention has been disclosed in <CIT> and entitled "ASSISTANCE LAMP OF A CAR").

<CIT> discloses a vehicle lighting assembly configured as a head lamp.

<CIT> discloses a lighting and/or signalling device arranged so as to provide at least first and second photometric functions.

<CIT> discloses a lighting device for a vehicle.

<CIT> discloses an optical block for a motor vehicle comprising a fully concealable lighting device.

Various embodiments are directed to a lighting device for a vehicle, which secure a view and provide lighting for providing information through a light source that is hidden or radiates light to the outside if necessary.

The present invention is defined by independent claim <NUM>; the dependent claims describe embodiments of the present invention.

According to the present invention, a lighting device for a vehicle includes a lens unit mounted on a vehicle body and a light source unit embedded in the lens unit and hidden in the lens unit or configured to radiate light to the lens unit.

The lens unit includes a first lens unit exposed to the outside and configured to transmit the light that is radiated by the light source unit, and a second lens unit disposed inside the first lens unit and configured to cover the first lens unit so that the inside of the first lens unit is invisible to the naked eye, the second lens unit (<NUM>) comprising parts that are isolated from each other.

The light source unit includes a light generation unit with a plurality of lamps disposed up and down configured to generate light when power is applied thereto, a light connection unit combined with the light generation unit, and a light rotation unit configured to rotate the light connection unit so that the light generation unit radiates the light to the lens unit.

The light source unit further includes a light cover unit mounted on the outside of the light generation unit and configured to cover the first lens unit so that the inside of the first lens unit is invisible to the naked eye. When a side of the light generation unit onto which the light cover unit is mounted is disposed to face the first lens unit by the light rotation unit, the light cover unit is disposed between the isolated spaces of the second lens unit so that the light source unit is in a state of being hidden.

The lighting device for a vehicle may further include a detection unit mounted on the vehicle body and configured to detect a surrounding environment and a controller configured to operate the light source unit by receiving a detection signal from the detection unit.

The detection unit may include at least any one of a movement detection unit for detecting a movement of an object, a noise detection unit for detecting noise, and a door detection unit for detecting an operation of a door.

The lighting device for a vehicle may further include an output unit mounted on the vehicle body and configured to provide auditory information to the outside.

The lighting device for a vehicle may further include an input unit provided in the vehicle body and configured to select a turn-on mode of the light source unit.

A lighting device for a vehicle that is not part of the present invention may include a center body unit mounted on a vehicle body and disposed at a central part of the front of the vehicle body, a lens unit disposed on each of both sides of the center body unit, a light source unit embedded in the lens unit and hidden in the lens unit or configured to radiate light to the lens unit, and a grill lens unit disposed between the center body unit and the lens unit and configured to provide grill lighting by transmitting the light that is radiated by the light source unit.

The lens unit may include a first lens unit exposed to the outside and configured to transmit the light that is radiated by the light source unit, a second lens unit disposed inside the first lens unit and configured to cover the first lens unit so that the inside of the first lens unit is invisible to the naked eye, and a third lens unit extended backward from the first lens unit and configured to guide, to the grill lens unit, the light that is radiated by the light source unit by transmitting the light.

The light source unit may include a light generation unit disposed up and down in a plural number and configured to generate light when power is applied thereto, a light connection unit combined with each of the light generation units, and a light rotation unit configured to rotate the light connection unit so that the light generation unit radiates the light to the lens unit or the grill lens unit.

The light source unit may further include a light cover unit mounted on the outside of each of the light generation units and configured to cover the first lens unit so that the inside of the first lens unit is invisible to the naked eye.

The lighting device for a vehicle may further include an output unit mounted on the vehicle body and configured to provide auditory information to the outside and an input unit provided in the vehicle body and configured to select a turn-on mode of the light source unit.

An example of a lighting method that is not part of the present invention may include a detection step of detecting, by a detection unit, an environment around a vehicle body, a light operation step of a light source unit being rotated and hidden in a lens unit or radiating light to the lens unit under a control of a controller that has received a detection signal from the detection unit, and a step of providing grill lighting by transmitting light that is radiated to the lens unit.

In the detection step, at least any one of a movement detection unit for detecting a movement of an object, a noise detection unit for detecting noise, and a door detection unit for detecting an operation of a door may operate.

The light operation step may include a door detection step of detecting, by the door detection unit, the lock or unlock of the door and a greeting lighting step of the light source unit being rotated and providing greeting lighting in response to a detection signal of the door detection unit.

The light operation step may include a pedestrian detection step of detecting, by any one or more of the movement detection unit and the noise detection unit, whether a pedestrian approaches, a walking lighting step of the light source unit being rotated and providing walking lighting in response to a pedestrian detection signal of any one or more of the movement detection unit and the noise detection unit, and a driving lighting step of the light source unit providing driving lighting according to day and night in response to a pedestrian non-detection signal of the movement detection unit and the noise detection unit.

The lighting method for a vehicle may further include an output step of providing, by an output unit, auditory information while operating in conjunction with the light source unit.

A turn-on mode of the light source unit and an output mode of the output unit may be wirelessly updatable.

In the lighting device for a vehicle according to the present invention, the light source unit that is disposed within the lens unit may be hidden in the lens unit or may provide lighting by radiating light to the lens unit, and may provide a driver or a pedestrian with a light signal.

Hereinafter, a lighting device and method for a vehicle will be described with reference to the accompanying drawings. In this process, the thicknesses of lines or the sizes of elements illustrated in the drawings may have been exaggerated for the clarity of a description and for convenience' sake.

<FIG> is a diagram schematically illustrating a lighting device for a vehicle according to an embodiment of the present invention. Referring to <FIG>, a lighting device <NUM> for a vehicle according to an embodiment of the present invention includes a lens unit <NUM> and a light source unit <NUM>.

The lens unit <NUM> may be mounted on a vehicle body <NUM>. For example, the lens unit <NUM> may be disposed at each of the left and right edges of the front of the vehicle body <NUM>. When light is radiated through the lens unit <NUM>, a driver's view can be secured, or information can be provided. In addition, the lens unit <NUM> may be disposed on any one or more of the side or rear of the vehicle body <NUM>.

The light source unit <NUM> is embedded in the lens unit <NUM>, and may be hidden in the lens unit <NUM> or may radiate light to the lens unit <NUM>. For example, as light that is radiated by the light source unit <NUM> passes through the lens unit <NUM>, driving lighting or information lighting may be provided. The driving lighting is lighting that induces securing a view upon night or day driving, and may be implemented by a low beam and a high beam. The information lighting may provide information to a driver before getting in a vehicle, a driver after getting out of a vehicle, a counterpart driver, or a pedestrian as the plurality of light source units <NUM> that are disposed up and down are turned on sequentially or alternately or are turned on simultaneously. The light source unit <NUM> may be used for communication in an autonomous driving mode, or may provide motion lighting for welcome or goodbye to a driver. The light source unit <NUM> being hidden in the lens unit <NUM> may mean that the light source unit <NUM> does not actually disappear from the lens unit <NUM>, but the light source unit <NUM> is not visually exposed because a view for the inside of the lens unit <NUM> is not secured when the light source unit <NUM> is viewed from the outside.

A center body unit <NUM> that is mounted on the vehicle body <NUM> may be disposed at a central part of the front of the vehicle body <NUM>. The center body unit <NUM> is fabricated by using a transparent or opaque material, and may transmit light if necessary. The lens unit <NUM> may be disposed on each of both sides of the center body unit <NUM>. Furthermore, the light source unit <NUM> may be disposed in the length direction of the center body unit <NUM> in a plural number, and may be hidden in the center body unit <NUM> or may radiate light to the center body unit <NUM>.

<FIG> is a diagram schematically illustrating the state in which the light source unit according to an embodiment of the present invention radiates light to the outside. <FIG> is a diagram schematically illustrating the state in which the light source unit according to an embodiment of the present invention has been hidden in the lens unit.

The lens unit <NUM> according to an embodiment of the present invention includes a first lens unit <NUM> and a second lens unit <NUM>.

The first lens unit <NUM> is exposed to the outside, and may transmit light that is radiated by the light source unit <NUM>. For example, the first lens unit <NUM> may be mounted on the vehicle body <NUM>, and covers the light source unit <NUM>. The first lens unit <NUM> may be molded by including a material capable of transmitting light.

The second lens unit <NUM> is disposed inside the first lens unit <NUM>, and hides the first lens unit <NUM> so that the inside of the first lens unit <NUM> is invisible to the naked eye. For example, the second lens unit <NUM> includes an opaque material, and may be mounted or applied on the inside of the first lens unit <NUM>. Parts of the second lens unit <NUM> are isolated from each other. Light may pass through the first lens unit <NUM> that is disposed between the isolated spaces of the second lens unit <NUM>.

The light source unit <NUM> according to an embodiment of the present invention includes a light generation unit <NUM>, a light connection unit <NUM>, and a light rotation unit <NUM>.

The light generation unit <NUM> may generate light when power is applied thereto. The light generation unit <NUM> may be disposed up and down in a plural number. For example, a plurality of LED lamps may be disposed up and down in the light generation unit <NUM>, and some of the plurality of LED lamps may be low beams and the remaining LED lamps may be high beams.

The light connection units <NUM> are combined with the light generation units <NUM>, respectively. For example, the light connection unit <NUM> may have one end connected to the light generation unit <NUM> and the other end connected to the light rotation unit <NUM>. The light connection unit <NUM> may have a straight, curved, or bent shape depending on the design of an internal space of the lens unit <NUM>.

The light rotation unit <NUM> may rotate each light connection unit <NUM> so that each light generation unit <NUM> radiates light to the lens unit <NUM>. For example, the light rotation unit <NUM> may be rotatably mounted on the vehicle body <NUM>. The light connection unit <NUM> may be combined with the outside of the light rotation unit <NUM>. When the front of the light generation unit <NUM> is disposed to face the first lens unit <NUM> by the light rotation unit <NUM>, lighting may be provided. Furthermore, when the side of the light generation unit <NUM> is disposed to face the first lens unit <NUM> by the light rotation unit <NUM>, the light source unit <NUM> has state in which the light source unit <NUM> has been hidden in the lens unit <NUM>.

The light source unit <NUM> according to an embodiment of the present invention further includes a light cover unit <NUM>. The light cover unit <NUM> is mounted on the outside of the light generation unit <NUM>, and may cover the first lens unit <NUM> so that the inside of the first lens unit <NUM> is invisible to the naked eye. For example, the light connection unit <NUM> may be combined with one side of the light generation unit <NUM>, and the light cover unit <NUM> may be mounted on the other side of the light generation unit <NUM>. When the side of the light generation unit <NUM> is disposed to face the first lens unit <NUM> by the light rotation unit <NUM>, the light cover unit <NUM> is disposed between the isolated spaces of the second lens unit <NUM>. Accordingly, the inside of the first lens unit <NUM> can be prevented from being recognized from the outside. The light cover unit <NUM> may be fabricated to have the same material and color as the second lens unit <NUM>. The first lens unit <NUM> may be formed to have curvature. The light cover unit <NUM> may be formed to have curvature corresponding to that of the first lens unit <NUM>. Furthermore, when the light cover unit <NUM> and the second lens unit <NUM> are consecutively disposed, the light source unit <NUM> may be recognized as being hidden in the lens unit <NUM> from the outside.

<FIG> is a diagram schematically illustrating a detection unit, an output unit, and an input unit according to an embodiment of the present invention. Referring to <FIG>, the lighting device <NUM> for a vehicle according to an embodiment of the present invention may further include a detection unit <NUM> and a controller <NUM>.

The detection unit <NUM> may be mounted on the vehicle body <NUM>, and may detect a surrounding environment. For example, the detection unit <NUM> may be disposed at an edge of the vehicle body <NUM>, that is, at the outside of the lens unit <NUM>. The detection unit <NUM> may detect a passing pedestrian or a sound.

The controller <NUM> may operate the light source unit <NUM> by receiving a detection signal from the detection unit <NUM>. For example, the controller <NUM> may control the plurality of light source units <NUM> in response to the detection signal of the detection unit <NUM> so that the plurality of light source units <NUM> is individually turned on or simultaneously turned on.

More specifically, the detection unit <NUM> may include at least any one of a movement detection unit <NUM>, a noise detection unit <NUM>, and a door detection unit <NUM>.

The movement detection unit <NUM> may detect a movement of an object. For example, the movement detection unit <NUM> may detect a movement of a driving vehicle or a pedestrian in an autonomous driving mode.

The noise detection unit <NUM> may detect surrounding noise. For example, the noise detection unit <NUM> may detect noise within a driving vehicle or noise that is caused by a pedestrian, which occurs around the vehicle body <NUM>.

The door detection unit <NUM> may detect an operation of a door. For example, the door detection unit <NUM> may detect whether the state of a door is a lock state or an unlock state in response to a manipulation of a remote controller that is owned by a driver or a door switch that is provided in the vehicle body <NUM>.

The lighting device <NUM> for a vehicle according to an embodiment of the present invention may further include an output unit <NUM>. The output unit <NUM> according to an embodiment of the present invention may be mounted on the vehicle body <NUM>, and may provide auditory information to the outside. For example, the output unit <NUM> may be disposed under the center body unit <NUM>, and may be a speaker that provides a voice signal or an alarm signal. The output unit <NUM> may provide information to the outside while operating in conjunction with the light source unit <NUM>. That is, the output unit <NUM> may output a voice signal or an alarm signal so that a pedestrian can safely pass by. The output unit <NUM> may be operated under the control of the controller <NUM> that has received a detection signal from the detection unit <NUM>. The output unit <NUM> may output the voice signal in the form of a sentence in a selected language, and may output the alarm signal in the form of various waning sounds.

The lighting device <NUM> for a vehicle according to an embodiment of the present invention may further include an input unit <NUM>. The input unit <NUM> according to an embodiment of the present invention is provided in the vehicle body <NUM>, and selects a turn-on mode of the light source unit <NUM>. Furthermore, the input unit <NUM> may select an output mode of the output unit <NUM>. For example, the plurality of light source units <NUM> may be turned on simultaneously or individually in the turn-on mode. The output unit <NUM> may provide a voice signal or an alarm signal in the output mode.

The input unit <NUM> may be a signal bar for selecting the turn-on mode or output mode of a vehicle or a switch by which various types of driving information can be selected.

A driver may select the turn-on mode and the output mode according to his or her taste. The turn-on mode and the output mode may have turn-on methods or output methods that vary depending on a welcome or goodbye state, a walking state of a pedestrian, or a vehicle surrounding state. The turn-on mode and the output mode may be wirelessly updated.

An operation of the lighting device for a vehicle according to an embodiment of the present invention is described as follows.

The center body unit <NUM> is disposed at the central part of the vehicle body <NUM>. The lens units <NUM> are disposed at the left and right edges of the vehicle body <NUM>. The light source unit <NUM> is covered by the lens unit <NUM>.

In this state, if driving lighting is required in response to a manipulation signal from a driver or based on a detected illuminance value, the front of the light generation unit <NUM> is disposed to face the first lens unit <NUM>. Accordingly, light that is radiated by the light generation unit <NUM> passes through the first lens unit <NUM> and provides driving lighting.

In order to form communion with another vehicle or a pedestrian in response to a manipulation signal from a driver or upon autonomous driving or for communion with a driver, the light rotation unit <NUM> reciprocates and rotates a predetermined section. Accordingly, the front of the light generation unit <NUM> is disposed to face the first lens unit <NUM>, or the side of the light generation unit <NUM> is disposed to face the first lens unit <NUM>. If the side of the light generation unit <NUM> is disposed to face the first lens unit <NUM>, the light cover unit <NUM> may be disposed at the rear of the first lens unit <NUM>, and the light source unit <NUM> may have a state in which the light source unit <NUM> has been hidden in the lens unit <NUM>.

In this case, when a surrounding environment, such as pedestrian information and driving vehicle information, is detected by the detection unit <NUM>, the light source unit <NUM> may be driven under the control of the controller <NUM>. The output unit <NUM> provides an auditory signal to the periphery of the vehicle body <NUM> in association with the light source unit <NUM>.

<FIG> is a diagram schematically illustrating the state in which the lighting device for a vehicle according to an embodiment of the present invention provides driving lighting and grill lighting. <FIG> is a diagram not being part of the present invention schematically illustrating the state in which driving lighting is performed in <FIG>. <FIG> is a diagram not being part of the present invention schematically illustrating the state in which grill lighting is performed in <FIG>. Referring to <FIG>, the lighting device <NUM> for a vehicle may further include a grill lens unit <NUM>. The grill lens unit <NUM> is disposed between the center body unit <NUM> and the lens unit <NUM>, and provides grill lighting by transmitting light that is radiated by the light source unit <NUM>. For example, the grill lens unit <NUM> may be connected to at least any one of the vehicle body <NUM>, the center body unit <NUM>, and the lens unit <NUM>. In this case, the grill lighting may be provided in the length direction of the vehicle body <NUM> on the left and right sides thereof. The grill lighting may be used for communication in the autonomous driving mode, or may provide a driver with motion lighting for welcome or goodbye.

The lens unit <NUM> may further include a third lens unit <NUM>. The third lens unit <NUM> extends backward from the first lens unit <NUM> and surrounds the light source unit <NUM>. The third lens unit <NUM> guides, to the grill lens unit <NUM>, light that is radiated by the light source unit <NUM> by transmitting the light. For example, the third lens unit <NUM> may extend from one end of the first lens unit <NUM>, and may partition a space in which the light source unit <NUM> is disposed. In addition, the third lens unit <NUM> may extend from both ends of the first lens unit <NUM> and cover the light source unit <NUM>. A part of the third lens unit <NUM> may transmit light, and the remainder thereof may block light.

Accordingly, when driving lighting is required in response to a manipulation signal from a driver or based on a detected illuminance value, the front of the light generation unit <NUM> is disposed to face the first lens unit <NUM> and provides light. Furthermore, in response to a manipulation signal from a driver, in order to form communion with another vehicle or a pedestrian upon autonomous driving, or for communion with a driver, when the light rotation unit <NUM> is driven, the light generation unit <NUM> radiates light toward the grill lens unit <NUM> while being rotated. In this case, the light that is generated by the light generation unit <NUM> passes through the third lens unit <NUM>, and provides grill lighting through the grill lens unit <NUM>. At this time, when the light generation unit <NUM> reciprocates and rotates by the light rotation unit <NUM>, an effect in which the grill lighting is moved left and right can be implemented.

<FIG> is a flowchart schematically illustrating a lighting method for a vehicle. Referring to <FIG>, the lighting method includes a detection step S10 and a light operation step S20.

In the detection step S10, the detection unit <NUM> detects an environment around the vehicle body <NUM>. The detection unit <NUM> may include at least any one of the movement detection unit <NUM>, the noise detection unit <NUM>, and the door detection unit <NUM>. The movement detection unit <NUM> may detect a movement of an object. The noise detection unit <NUM> may detect surrounding noise. The door detection unit <NUM> may detect an operation of a door. In the detection step S10, at least any one of the movement detection unit <NUM>, the noise detection unit <NUM>, and the door detection unit <NUM> may detect a change in the surrounding environment.

In the light operation step S20, the light source unit <NUM> is rotated and hidden in the lens unit <NUM> or radiates light to the lens unit <NUM>, under the control of the controller <NUM> that has received a detection signal from the detection unit <NUM>. That is, in the light operation step S20, the plurality of light source units <NUM> that are disposed up and down may be individually operated or simultaneously operated.

The lighting method may further include an output step S30. In the output step S30, the output unit <NUM> provides auditory information while operating in conjunction with the light source unit <NUM>. For example, under the control of the controller <NUM>, the light source unit <NUM> may be rotated and provide light information, and the output unit <NUM> may provide a voice signal or an alarm signal.

The turn-on mode of the light source unit <NUM> or the output mode of the output unit <NUM> may have turn-on methods or output methods that vary depending on a welcome or goodbye state, a walking state of a pedestrian, or a vehicle surrounding state. The turn-on mode and the output mode may be wirelessly updated.

<FIG> is a diagram schematically illustrating a light operation method for greeting lighting. Referring to <FIG>, the light operation method for greeting lighting includes a door detection step S21 and a greeting lighting step S22.

In the door detection step S21, the door detection unit <NUM> detects the lock or unlock of a door. For example, the door detection unit <NUM> may detect whether the state of a door is the lock state or the unlock state, in response to a manipulation of a remote controller that is owned by a driver or a door switch that is provided in the vehicle body <NUM>.

In the greeting lighting step S22, the light source unit <NUM> provides greeting lighting while being rotated, in response to a detection signal of the door detection unit <NUM>. For example, in the case of a welcome signal, the plurality of light source units <NUM> may be sequentially or simultaneously turned on and may provide a light signal for welcome, and a winker may flicker. Furthermore, in the case of a goodbye signal, the plurality of light source units <NUM> may be sequentially or simultaneously turned on, and may provide a light signal for goodbye. In addition, the output unit <NUM> may output a voice signal or alarm signal corresponding to greeting lighting, along with a light signal.

<FIG> is a diagram schematically illustrating a light operation method for walking lighting. Referring to <FIG>, the light operation method for walking lighting includes a pedestrian detection step S25, a walking lighting step S26, and a driving lighting step S27.

In the pedestrian detection step S25, any one or more of the movement detection unit <NUM> and the noise detection unit <NUM> detects whether a pedestrian approaches. For example, the movement detection unit <NUM> may detect a movement of a surrounding object, and the noise detection unit <NUM> may detect surrounding noise. The movement detection unit <NUM> and the noise detection unit <NUM> may detect a pedestrian.

In the walking lighting step S26, the controller <NUM> may determine whether a pedestrian walks past the front of the vehicle which has been stopped, by receiving a pedestrian detection signal from any one or more of the movement detection unit <NUM> and the noise detection unit <NUM>. Furthermore, the light source unit <NUM> provides walking lighting while being rotated, under the control of the controller <NUM> based on a walking state of the pedestrian. For example, the plurality of light source units <NUM> may be sequentially or simultaneously turned on, and may provide a light signal that induces the walking direction of the pedestrian or the walking safety of the pedestrian. In this case, the output unit <NUM> may output a voice signal or alarm signal corresponding to the walking lighting, along with the light signal.

In the driving lighting step S27, in the process of the walking lighting being performed, if the movement detection unit <NUM> and the noise detection unit <NUM> do not detect the pedestrian, the controller <NUM> determines that the pedestrian has passed by. At this time, the light source unit <NUM> may provide driving lighting according to day and night, under the control of the controller <NUM>.

That is, in the case of daytime, after the pedestrian passes by, motion driving of the light source unit <NUM> may be stopped, and daytime driving lighting may be turned on. Furthermore, in the case of nighttime, after the pedestrian passes by, motion driving of the light source unit <NUM> may be stopped, and nighttime driving lighting may be turned on.

Claim 1:
A lighting device for a vehicle, comprising:
a lens unit (<NUM>) adapted to be mounted on a vehicle body; and
a light source unit (<NUM>) embedded in the lens unit (<NUM>) and being configured to be in a first state to be hidden in the lens unit (<NUM>) or in a second state to radiate light to the lens unit (<NUM>),
characterized in that the lens unit (<NUM>) comprises:
a first lens unit (<NUM>) exposed to an outside and configured to transmit the light that is radiated by the light source unit (<NUM>); and
a second lens unit (<NUM>) disposed inside the first lens unit (<NUM>) and configured to cover the first lens unit (<NUM>) so that an inside of the first lens unit (<NUM>) is invisible to a naked eye, the second lens unit (<NUM>) comprising parts that are isolated from each other,
wherein the light source unit (<NUM>) comprises:
a light generation unit (<NUM>) with a plurality of lamps disposed up and down when the lighting device is mounted on the vehicle and configured to generate light when power is applied thereto;
a light connection unit (<NUM>) combined with the light generation unit (<NUM>);
a light rotation unit (<NUM>) configured to rotate the light connection unit (<NUM>) so that the light generation unit (<NUM>) rotates between the first state and the second state to radiate light to the lens unit (<NUM>), and
a light cover unit (<NUM>) mounted on an outside of the light generation unit (<NUM>) and configured, when the light source unit (<NUM>) is in the first state, to cover the first lens unit (<NUM>) so that an inside of the first lens unit (<NUM>) is invisible to a naked eye,
when a side of the light generation unit (<NUM>) onto which the light cover unit (<NUM>) is mounted is disposed to face the first lens unit (<NUM>) by the light rotation unit (<NUM>), the light cover unit (<NUM>) is disposed between the isolated parts of the second lens unit (<NUM>) so that the light source unit (<NUM>) is in a state of being hidden.