Patent Description:
A display device such as a television (TV) or the like may provide a specific function (e.g., to play image contents) in an on state and may be turned off when not providing the specific function. If being turned off, the conventional display device may maintain a black screen state.

<CIT> discloses an apparatus includes a detecting unit for detecting whether a user is sleeping and identifying the user.

<CIT> discloses a display method capable of displaying the original power saving effect.

Since maintaining a black screen in an off state, a conventional display device may make a display environment, to which the display device is applied, plain and unattractive. To solve the issue, if the conventional display device (e.g., personal computer (PC)) stands by in an on state, the conventional display device may provide a screen for beautification (e.g., a screen saver). However, when operating in the on state, the conventional display device may provide the screen for beautification depending on a user input.

Various exemplary embodiments may provide a display device and a method that display the screen for beautification (e.g., a static image) after being turned on automatically and operate in a plurality of modes.

In accordance with an aspect of an exemplary embodiment, a display device is provided according claim <NUM>. Optional features are provided according to claims <NUM>-<NUM>.

A display method of a display device is provided according to claim <NUM>. The optional features are provided according to claim <NUM>.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various exemplary embodiments.

According to various exemplary embodiments, the screen for beautification may be displayed after being turned on automatically.

The above and other aspects, features, and advantages of exemplary embodiments will be more apparent from the following description taken in conjunction with the accompanying drawings. Understanding that these drawings depict only exemplary embodiments and are not therefore to be considered to be limiting of the scope of the disclosure, the principles herein are described and explained with additional specificity and detail through the use of the accompanying drawings, in which:.

Below, various exemplary embodiments will be described with reference to accompanying drawings. However, those of ordinary skill in the art will recognize that modification, equivalent, and/or alternative on the various exemplary embodiments described herein can be variously made without departing from the scope of the present disclosure. The scope of the invention is however solely defined in the appended claims. With regard to description of drawings, similar elements may be marked by similar reference numerals.

<FIG> is a block diagram of a display device, according to an exemplary embodiment. <FIG> is a diagram illustrating each driving mode of a display device, according to an exemplary embodiment.

Referring to <FIG>, according to an exemplary embodiment, a display device <NUM> may include a display <NUM>, an inputter or an input module <NUM>(or input device, or input interface), a sensor or a sensor module <NUM>, a communication interface or a communication module <NUM> (or communication circuit), a memory <NUM>, and a processor <NUM>. According to an exemplary embodiment, the display device <NUM> may exclude some elements or may further include other additional elements. Alternatively, according to an exemplary embodiment, some of the elements of the display device <NUM> may be combined with each other so as to form one entity, so that the functions of the elements may be performed in the same manner as before the combination. The relation between the input and the output illustrated in <FIG> may be exemplified for descriptive convenience. Accordingly, exemplary embodiments may not be limited thereto.

According to an exemplary embodiment, the display device <NUM> may include at least one of a TV, a monitor, a notebook computer, a Large Format Display (LFD), a smartphone, a tablet personal computer (PC), a mobile phone, a video telephone, an e-book reader, a desktop PC, a laptop PC, a netbook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), a Motion Picture Experts Group (MPEG-<NUM> or MPEG-<NUM>) Audio Layer <NUM> (MP3) player, a camera, a wearable device, or an electronic picture frame.

The display <NUM> may include, for example, a liquid crystal display (LCD), a lightemitting diode (LED) display, an organic LED (OLED) display, or an electronic paper display. The display <NUM> may display, for example, various contents (e.g., a text, an image, a video, an icon, and/or a symbol) to a user. According to an exemplary embodiment, the display <NUM> may be always turned on in a first mode and may be turned on or off in a second mode.

According to an exemplary embodiment, the inputter or an input module <NUM> may sense or receive a user input and may output a signal corresponding to the sensed or received user input. For example, the input module <NUM> may include at least one of a communication unit or component or an input button. In an exemplary embodiment, the communication unit may communicate with a remote control device. If the remote control device transmits a control signal corresponding to a button manipulated by a user, the communication unit may receive the control signal from the remote control device and may change the received control signal into a form that is capable of being recognized by the processor <NUM>. If receiving the command signal, which is to be transmitted to the remote control device, from the processor <NUM>, the communication unit may change the received command signal to a command signal corresponding to a communication method of the remote control device and may transmit the changed signal to the remote control device. For example, the communication unit may communicate with the remote control device by using various short range communication methods such as Bluetooth, near field communication (NFC), infrared (IR) communication, and the like. In an exemplary embodiment, the input button may be a button included in the display device <NUM>. In an exemplary embodiment, each of the remote control device and the input button may include a power button. In the case where the input module <NUM> senses a short press (a first user input) of the power button, the input module <NUM> may output a first signal. In the case where the input module <NUM> senses a long press (a second user input) of the power button, the input module <NUM> may output a second signal.

According to an exemplary embodiment, the sensor or the sensor module <NUM> may include at least one of an illuminance sensor that senses external illuminance or an image sensor that senses the movement of a user. The latter image sensor may include at least one of a camera sensor or an infrared sensor. The image sensor may capture an image within a specified range. For example, the specified range may be within a first distance (e.g., <NUM>) from the center of the image sensor and within a critical angle (e.g., <NUM> degrees).

According to an exemplary embodiment, the communication module <NUM> may communicate with an external electronic device in the specified communication method. For example, the specified communication method may include wireless fidelity (Wi-Fi), Bluetooth, NFC, <NUM> (3rd Generation), LTE (Long Term Evolution), or the like.

The memory <NUM> may be a volatile memory (e.g., a RAM or the like), a nonvolatile memory (e.g., a ROM, a flash memory, or the like), or the combination thereof. For example, the memory <NUM> may store instructions or data associated with at least one other element(s) of the display device <NUM>. According to an exemplary embodiment, the memory <NUM> may store first information for providing a user interface corresponding to a driving mode. The memory <NUM> may store second information for switching between driving modes. For example, the second information may include a reference for switching a driving mode corresponding to the user input or for switching a state in a second mode, and the like.

For example, the processor <NUM> may include at least one of a central processing unit (CPU), a graphic processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), or field programmable gate arrays (FPGA) and may have a plurality of cores. The processor <NUM> may perform data processing or an operation associated with control and/or communication of at least one other element(s) of the display device <NUM>.

Referring to <FIG>, according to an exemplary embodiment, the processor <NUM> may operate in a first mode, a second mode, or a third mode. For example, the first mode may be a mode for displaying a dynamic image in the display <NUM>. For example, the second mode may be a mode for displaying a static image in the display <NUM>. For example, the first mode may be a high-power mode. The second mode may be a first low-power mode. The third mode may be a second low-power mode. If the second user input is sensed through the input module <NUM> in the first mode or the second mode, the processor <NUM> may turn off the devices.

According to an exemplary embodiment, the processor <NUM> may receive a dynamic image from a first server through an external interface in the first mode and may display the dynamic image by using the display <NUM>. For example, the external interface may be an optical cable, a digital video interactive (DVI), a high definition multimedia interface (HDMI), or the like. For example, in the case where the display device <NUM> is a TV, the first server may be a server providing a first service, and may be a server of a provider providing a TV service. The dynamic image may be, for example, contents for each channel.

According to an exemplary embodiment, the processor <NUM> may turn off the sensor module <NUM> in the first mode and may drive elements, for example, the communication module <NUM>, the memory <NUM>, and the display <NUM>, other than the sensor module <NUM>. In the first mode, the processor <NUM> may control the backlight of the display <NUM> to be set to first brightness. For example, the first brightness may be brightness brighter than the brightness of the backlight of the second mode.

According to an exemplary embodiment, the processor <NUM> may drive the image sensor in the second mode and may sense the movement of a user by using the captured image of the image sensor during at least a first critical time. In the case where the movement of the user is sensed from the captured image within the first critical time, the processor <NUM> may display the static image by using the display <NUM>. When displaying the static image, the processor <NUM> may control the backlight of the display <NUM> to be set to second brightness (< the first brightness). For example, the first critical time may be a reference for determining the number of images, which are used to sense the movement, from among the captured images received from the image sensor, and may be automatically set based on illuminance. In the second mode, the processor <NUM> may display a static image, which is set to a default image, from among the static images stored in the memory <NUM> in the display <NUM>. For example, the static image may include a famous painting image, a picture image, a still image, or the like.

According to an exemplary embodiment, in the second mode, in the case where the movement of the user is not sensed during a second critical time in a state where the static image is displayed in the display <NUM>, the processor <NUM> may turn off the display <NUM>. In the case where the processor <NUM> turns off the display <NUM>, the processor <NUM> may also turn off the backlight. The second critical time may be a time that is manually set through the input module <NUM>. As such, in an exemplary embodiment, the state of the processor <NUM> may be automatically switched to a first state in which the static image is displayed in the display <NUM>, or a second state in which the display <NUM> is turned off, depending on whether the movement of the user is sensed in the second mode.

In an exemplary embodiment, in the case where "always on display (AOD)" is set in the second mode, the processor <NUM> may not turn off the display <NUM> depending on whether the movement of the user is sensed. In this case, since there is no need to sense the movement of the user, the processor <NUM> may turn off the sensor module <NUM>.

According to an exemplary embodiment, the processor <NUM> may set or change a first critical time based on the illuminance sensed by using an illuminance sensor. For example, as the illuminance sensed through the sensor module <NUM> becomes lower, the processor <NUM> may increase a first critical time. As the illuminance sensed through the sensor module <NUM> becomes higher, the processor <NUM> may decrease the first critical time. For another example, the processor <NUM> may set a specified time to the first critical time with respect to each illuminance range. In particular, if the sensed illuminance is less than <NUM> [lux], the processor <NUM> may set the first critical time to <NUM> seconds. If the sensed illuminance is not less than <NUM> [lux] and is less than <NUM> [lux], the processor <NUM> may set the first critical time to <NUM> seconds. If the sensed illuminance is not less than <NUM> [lux], the processor <NUM> may set the first critical time to <NUM> seconds. As such, in an exemplary embodiment, when the illuminance is reduced, a time (the first critical time) when the movement of the user is sensed may be extended, and thus the accuracy of detection of the movement of the user may be improved.

According to an exemplary embodiment, if the processor <NUM> senses a first user input through the input module <NUM> in the first mode, the processor <NUM> may switch the driving mode to the second mode, and the processor <NUM> may operate in the second mode. For example, if the processor <NUM> receives the first signal in the first mode, the processor <NUM> may switch the driving mode to the second mode. For example, the first signal may be a signal transmitted in the case where the input module <NUM> senses the short press (the first user input) of the power button. In an exemplary embodiment, in the case where a third user input is sensed through the input module <NUM> in the first mode, the processor <NUM> may switch the driving mode to the second mode, and the processor <NUM> may operate in the second mode. For example, if the processor <NUM> receives a third signal in the first mode, the processor <NUM> may switch the driving mode to the second mode. The third signal may be a signal transmitted in the case where the input module <NUM> senses the manipulation (a third user input) of a specified function menu of the display device <NUM>. If the processor <NUM> receives the first user input through the input module <NUM> in the second mode, the processor <NUM> may switch the driving mode to the first mode, and the processor <NUM> may operate in the first mode.

According to an exemplary embodiment, if the second user input is sensed through the input module <NUM> in the first mode or the second mode, the processor <NUM> may turn off the sensor module <NUM>, the display <NUM>, the memory <NUM>, and the communication module <NUM> (hereinafter referred to as "device-off"). For example, if the processor <NUM> receives the first signal in the first mode or the second mode, the processor <NUM> may turn off a device. For example, the first signal may be a signal transmitted in the case where the input module <NUM> senses the long press (the second user input) of the power button. After turning off the sensor module <NUM>, the display <NUM>, the memory <NUM>, and the communication module <NUM>, the processor <NUM> may be turned off.

According to an exemplary embodiment, if the processor <NUM> senses a second user input through the input module <NUM> in the device-off state, the processor <NUM> may switch the driving mode to the immediately-preceding mode. For example, if the processor <NUM> senses the second user input when the devices is turned off in the first mode, the processor <NUM> may switch the driving mode to the first mode. For another example, if the processor <NUM> senses the second user input when the devices is turned off in the second mode, the processor <NUM> may switch the driving mode to the second mode.

According to an exemplary embodiment, when displaying the static image in the display <NUM> in the second mode and when turning off the display <NUM> in the second mode, the processor <NUM> may display or remove the static image naturally. For example, when the processor <NUM> turns on the display <NUM> in an off state of the display <NUM> to display the static image, the processor <NUM> may fade in the static image and then may display the static image in the display <NUM>. For another example, when the processor <NUM> turns off the display <NUM> in a state where the static image is displayed, the processor <NUM> may turns off the display <NUM> after fading out the static image.

According to an exemplary embodiment, the processor <NUM> may sense the movement of the user from the captured image based on at least one of the size of an object, a movement size, or a movement pattern. For example, the processor <NUM> may verify a moving object from an image captured during the first critical time by the image sensor. If verifying the moving object, the processor <NUM> may calculate the size of the object based on a ratio of pixels occupied by the verified object to pixels of the captured image. The processor <NUM> may determine whether the calculated size of the object is not less than a critical size. For another example, the processor <NUM> may detect the motion vector of the verified object and may determine whether the motion vector is not less than a specified size. For another example, if, in the image captured during the first critical time, the size of the object is not less than the critical size and the movement size is not less than the specified size, the processor <NUM> may determine that the movement of the verified object is the movement of the user. As such, in an exemplary embodiment, the processor <NUM> may accurately detect the movement of the user.

According to an exemplary embodiment, the processor <NUM> may verify the pattern of the motion vector and may determine whether the verified pattern is repeated. If the pattern of the motion vector is repeated, the processor <NUM> may turn off the display <NUM>. As such, since it is difficult for the user to move while having a specific regularity, in the case where the pattern of the motion vector is repeated, the processor <NUM> may determine that the movement of the verified object is not the movement of the user, and may turn off the display <NUM>.

According to an exemplary embodiment, the processor <NUM> may provide a first user interface in the first mode and may provide a second user interface different from the first user interface in the second mode. For example, in the case where the display device <NUM> is a TV, the first user interface may include channel selection, content selection, various settings (a volume or an image), and the like. For example, the second user interface may be for at least one of the setting (or changing), purchasing, or downloading of the static image.

According to an exemplary embodiment, the processor <NUM> may transmit configuration setting information of the second mode to an external electronic device through the communication module <NUM>. For example, the configuration setting information may be information necessary for the external electronic device to display the second user interface. In an exemplary embodiment, if receiving the configuration setting information of the second mode from the external electronic device, the processor <NUM> may change the configuration setting value of the second mode based on the received configuration setting information of the second mode. For example, the configuration setting information may be information for setting the static image, the second critical time, or the like. If the configuration setting information of the second mode is receiving while operating in the first mode, the processor <NUM> may change a configuration setting value to the configuration setting value of the second mode when the first mode is switched to the second mode. The detailed configuration of the processor <NUM> and the external electronic device will be described with reference to <FIG>.

<FIG> is a view illustrating a second user interface, according to an exemplary embodiment. <FIG> is a view illustrating a second user interface of my category, according to an exemplary embodiment. <FIG> is a view illustrating a second user interface of a collection category, according to an exemplary embodiment.

Referring to <FIG>, according to an exemplary embodiment, the second user interface may be composed of or include a plurality of categories. The state where the second user interface is composed of three categories <NUM>, <NUM>, and <NUM> and the product category (store) <NUM> of the three categories <NUM>, <NUM>, and <NUM> is designated is described with reference to <FIG>, as an example. However, exemplary embodiments may not be limited thereto. The three categories may include my category (my library) <NUM>, the product category (store) <NUM>, and the collection category <NUM>.

The product category <NUM> of <FIG> may be a category for purchasing the paid static image. The product category <NUM> may be for managing the paid static image for each theme. For example, a plurality of themes may be landscapes, drawings, still life, land art, architecture, digital art, action, patterns, street art, wildlife, and the like. The processor <NUM> may provide a user interface for at least one of the displaying (preview), purchasing, or applying of the paid static image received from a second server, in the product category. For example, the processor <NUM> may provide work information including at least one of, for example, a title of a work, an artist name, or detailed information of a work or an artist from the product category <NUM>. In an exemplary embodiment, the product category <NUM> may provide a user interface for verifying and purchasing the hardware accessory of the display device <NUM>, for example, a bezel, a stand, or the like. In an exemplary embodiment, the processor <NUM> may communicate with the second server through the external interface or may communicate through the communication module <NUM>.

My category <NUM> of <FIG> may be a category for verifying the static image stored in the memory <NUM>. For example, as illustrated in <FIG>, the memory <NUM> may store the purchased static image <NUM> and a photo <NUM> stored in the memory <NUM>. For example, each of static images may be sorted and displayed for each date purchased or for each date added.

The collection category <NUM> of <FIG> may be a category for downloading a free static image. For example, the free static image may be received from the second server. The processor <NUM> may provide a user interface for at least one of the displaying (preview), downloading, or applying of a free static image from the collection category <NUM> For example, the processor <NUM> may provide collection information including at least one of, for example, a title of a work, an artist name, a work, or detailed information of a work or an artist from the collection category. Referring to <FIG>, the collection category <NUM> may manage the free static image for each theme.

<FIG> is a block diagram illustrating an interface among a display device, an external electronic device, and an external server, according to an exemplary embodiment.

Referring to <FIG>, according to an exemplary embodiment, if entering the product category <NUM> or the collection category <NUM>, the display device <NUM> (e.g., the processor <NUM>) may transmit specification information of the display device <NUM> to a second server <NUM>. For example, the specification information may include at least one of a model name of the display device <NUM> or login information.

According to an exemplary embodiment, the second server <NUM> may transmit a static image list to the display device <NUM> based on the specification information. In an exemplary embodiment, the second server <NUM> may verify the resolution or the mounting type (e.g., a wall mounting type, a stand type) of the display device <NUM>, or the like based on the specification information and may transmit hardware accessory information of the display device <NUM>. The second server <NUM> may be a server of a provider selling a static image, an accessory, and the like. For example, the second service may provide at least one of a service for selling the static image or a service for providing information of an accessory compatible with a display device.

According to an exemplary embodiment, the display device <NUM> may display an outline image (e.g., thumbnail) of the static image in the display <NUM> based on the specification information received from the second server <NUM>. For example, the second server <NUM> may provide a static image list including the thumbnail of the static image corresponding to the received specification information.

According to an exemplary embodiment, if the user of the display device <NUM> makes a request for a preview of one among static images of the static image list provided by the second server <NUM>, the display device <NUM> may make a request for the detailed image of the selected static image to the second server <NUM>. In this case, the second server <NUM> may transmit the requested detailed image of the static image to the display device <NUM>, and the display device <NUM> may receive the detailed image of the static image to display the detailed image of the static image on a full screen of the display <NUM>. Until the static image is purchased, the detailed image of the static image may not be stored in the display device <NUM>.

According to an exemplary embodiment, if the user requests to purchase or download one of static images, the second server <NUM> may provide the purchase interface or download interface of the requested static image. The second server <NUM> may transmit the static image, which is purchased or downloaded through the purchase interface or download interface and which corresponds to the specification information (e.g., a resolution) of the display device <NUM>, to the display device <NUM>.

According to an exemplary embodiment, the second server <NUM> may provide a browsing app capable of displaying a second user interface of the display device <NUM>, in response to the request of an external electronic device <NUM>.

According to an exemplary embodiment, if the browsing app is executed after being installed, the external electronic device <NUM> may display the second user interface on the screen of the browsing app based on configuration setting information of the second mode. Before that, there is a need for the external electronic device <NUM> to receive the configuration setting information of the second mode from the display device <NUM>.

According to an exemplary embodiment, if the user changes the configuration setting information of the second mode by using the second user interface displayed on the screen of the browsing app, the external electronic device <NUM> may transmit the changed configuration setting information to the display device <NUM>. For example, the user may perform at least one of purchasing, previewing, or downloading the static image by using the second user interface displayed on the screen of the browsing app and may request to apply the static image. In this case, the external electronic device <NUM> may transmit the static image and an application request (configuration setting information) to the display device <NUM>.

According to an exemplary embodiment, if receiving information of the static image and the request to apply, the display device <NUM> may set the static image to be displayed in the second mode. The display device <NUM> may download the static image from the external electronic device <NUM> or the second server <NUM>. As such, in an exemplary embodiment, while operating in a first mode, the display device <NUM> may change the configuration setting information of the second mode by using the external electronic device <NUM>.

According to an exemplary embodiment, in the case where the display device <NUM> receives the configuration setting information of the second mode while operating in the first mode, the display device <NUM> may change a configuration setting information to the configuration setting information of the second mode based on the configuration setting information of the second mode when entering the second mode. For example, in the case where the display device <NUM> verifies the information of the static image, which is applied in the second mode, while operating in the first mode, the display device <NUM> may download the static image from the second server <NUM> to store the downloaded static image in the memory <NUM> and may set the downloaded static image to the default static image of the second mode. Afterwards, if the driving mode is switched from the first mode to the second mode, the display device <NUM> may display the default static image. <FIG> is a flowchart illustrating a method of setting a first critical time depending on illuminance, according to an exemplary embodiment.

Referring to <FIG>, in operation <NUM>, the processor <NUM> may sense external illuminance by using an illuminance sensor.

In operation <NUM>, the processor <NUM> may determine whether the sensed illuminance is not less than first critical illuminance. For example, the first critical illuminance may be <NUM> [lux].

In operation <NUM>, if the sensed illuminance is not less than the first critical illuminance, the processor <NUM> may set a first critical time to a first time (e.g., <NUM> seconds). The first time may be a time period, which is the shortest, from among critical time periods each of which is capable of being set.

In operation <NUM>, if the sensed illuminance is less than the first critical illuminance, the processor <NUM> may determine whether the sensed illuminance is not less than second critical illuminance. For example, the second critical illuminance may be <NUM> [lux].

In operation <NUM>, if the sensed illuminance is less than the first critical illuminance and is not less than the second critical illuminance, the processor <NUM> may set the first critical time to a second time (< the first time). For example, the second time may be <NUM> seconds.

In operation <NUM>, if the sensed illuminance is less than the second critical illuminance, the processor <NUM> may set the first critical time to a third time (< the second time). For example, the third time may be <NUM> seconds.

The case where the processor <NUM> sets the first critical time to be classified into <NUM> depending on the sensed illuminance is described with reference to <FIG> as an example. However, the first critical time may be set to be classified into <NUM> or more or less than <NUM> depending on the characteristic of an image sensor, or the like. As such, in an exemplary embodiment, when ambient illumination is reduced, a time (the first critical time) when the movement of the user is sensed may be extended, and thus the accuracy of detection of the user may be improved.

<FIG> is a flowchart illustrating a method for sensing movement of a user, according to an exemplary embodiment.

Referring to <FIG>, in operation <NUM>, the processor <NUM> may determine whether a specified period elapses.

In operation <NUM>, if the specified period elapses, the processor <NUM> may analyze an image captured by an image sensor during a first critical time. The first critical time may be set through the procedure of <FIG>.

In operation <NUM>, the processor <NUM> may verify a moving object from the image captured during the first critical time.

In operation <NUM>, the processor <NUM> may determine whether the size of the verified object is not less than a critical size. For example, the processor <NUM> may calculate the size of the object based on a ratio of pixels occupied by the verified object to pixels of the captured image.

In operation <NUM>, the processor <NUM> may determine whether the size of the motion vector of the verified object is not less than a specified size. For example, after detecting the motion vector from the captured image, the processor <NUM> may verify the size of the motion vector and may compare the size of the verified motion vector with the specified size.

In operation <NUM>, the processor <NUM> may determine whether the pattern of the motion vector is repeated. The processor <NUM> may detect the pattern from the motion vector. Since the procedure of determining whether the pattern is repeated may be drawn by those skilled in the art from prior documents associated with a way to detect a pattern, the detailed description thereof may be skipped.

In operation <NUM>, if the pattern of the motion vector is not repeated, the processor <NUM> may determine that the verified object is a user. Since the movement of the user is sensed through the procedure of operation <NUM>, the processor <NUM> may display a static image in the display <NUM>.

In operation <NUM>, if the pattern of the motion vector is repeated, the processor <NUM> may turn off display <NUM> of an on state. As such, since the movement of the user is not uniformly repeated, in the case where the pattern of the motion vector is repeated, the processor <NUM> may determine that the motion vector is a noise and may ignore the noise. In addition, even in the case the size of the moving object is less than a critical size or even though the size of the motion vector is less than a specific size, the processor <NUM> may determine that the movement is not the movement of the user, and thus disregard the movement. In an exemplary embodiment, even though the moving object is detected from the captured image, the movement of the user may be detected after excluding the noise based on at least one of an object size, the size of the motion vector, or the pattern of the motion vector, thereby improving the accuracy of detection of the user.

<FIG> is a flowchart illustrating a method for switching a driving mode, according to an exemplary embodiment.

Referring to <FIG>, according to an exemplary embodiment, in operation <NUM>, the processor <NUM> may monitor whether a specified period elapses. In operation <NUM>, if the specified period elapses, the processor <NUM> may wake up an illuminance sensor and an image sensor.

In operation <NUM>, if the specified period elapses, the processor <NUM> may sense the movement of a user through the procedure of <FIG>.

In operation <NUM>, if the movement of the user is sensed, the processor <NUM> may display a static image in the display <NUM>.

In operation <NUM>, the processor <NUM> may sense the movement of the user by using the image sensor while displaying the static image in the display <NUM>.

In operation <NUM>, if the movement is not sensed, the processor <NUM> may determine whether the movement of the user is not sensed during a second critical time. If AOD is set in the second mode, operation <NUM> and operation <NUM> may be skipped.

In operation <NUM>, if the movement of the user is not sensed during the second critical time, the processor <NUM> may turn off the display <NUM>.

In operation <NUM>, while displaying the static image in the display <NUM>, the processor <NUM> may determine whether a first user input is received from the input module <NUM>.

In operation <NUM>, if the first user input is received from the input module <NUM>, the processor <NUM> may switch the driving mode to a first mode and the processor <NUM> may operate in the first mode. When the mode is switched to the first mode, the processor <NUM> may turn off the sensor module <NUM>.

In operation <NUM>, the processor <NUM> may determine whether the first user input or a third user input is received in the first mode. In operation <NUM>, if the first user input or the third user input is received, the processor <NUM> may switch the driving mode to the second mode, and the processor <NUM> may perform operation <NUM>.

Meanwhile, after not sensing the movement of the user in operation <NUM> or after performing operation <NUM>, the processor <NUM> may perform operation <NUM>. When the second mode ends, operation <NUM> to operation <NUM> may be completed.

<FIG> is a flowchart illustrating a method for display method, according to an exemplary embodiment.

In operation <NUM>, the processor <NUM> may sense illuminance by using a first sensor.

In operation <NUM>, the processor <NUM> may set a first critical time based on the sensed illuminance.

In operation <NUM>, the processor <NUM> may sense movement by using a second sensor during the first critical time in the second mode.

In operation <NUM>, the processor <NUM> may display the static image in the display, if specified movement of a user is sensed within the first critical time in the second mode.

According to an exemplary embodiment, a display device includes a display; a first sensor configured to sense movement; a second sensor configured to sense illuminance; and a processor operatively connected with the display, the first sensor, and the second sensor, wherein the processor is configured to operate in a first mode or a second mode, wherein the first mode is a mode in which a dynamic image is displayed in the display, and wherein the second mode is a mode in which a static image is displayed in the display; set a first critical time for sensing the movement based on the illuminance; and if specified movement of an user is sensed in the second mode within the first critical time, display the static image in the display.

The processor is configured to if the movement of the user is not sensed during a second critical time in a state where the static image is displayed in the display, turn off the display.

The processor is configured to fade out the static image in the operation of turning off the display; and if the movement of the user is sensed, turn on the display and then fade in a static image to display the static image.

The processor is configured to as the sensed illuminance becomes lower, increase the first critical time; and as the sensed illuminance becomes higher, decrease the first critical time.

The processor is configured to if the sensed illuminance belongs to a first illuminance range, set the first critical time to a first time; if the sensed illuminance belongs to a second illuminance range, set the first critical time to a second time; and if the sensed illuminance belongs to a third illuminance range, set the first critical time to a third time; wherein the first illuminance range includes an illuminance value higher than the second illuminance range, wherein the second illuminance range includes an illuminance value higher than the third illuminance range, wherein the first time is shorter than the second time, and wherein the second time is shorter than the third time.

The processor is configured to if it is sensed by using the first sensor that an object of a critical size or more moves more than a specified movement size, determine that the movement of the user is sensed.

The first sensor includes an image sensor, and wherein the processor is configured to if verifying a moving object from an image captured by using the image sensor during the first critical time, calculate a size of the object based on a ratio of pixels occupied by the verified object to total pixels of the image.

The first sensor includes an image sensor, wherein the processor is configured to if verifying a moving object from an image captured by using the image sensor during the first critical time, detect a motion vector of the verified object; and calculate a size of the motion vector as a movement size of the object.

The processor is configured to verify a pattern of the motion vector; and if the pattern is repeated, ignore the motion vector.

According to an exemplary embodiment, the display device further includes an input module configured to receive a user input, wherein the processor is configured to if a first user input is received through the input module in the first mode, operate in the second mode; and if a second user input is received through the input module in the first mode, turn off the display, the first sensor, and the second sensor.

The processor is configured to provide a first user interface in the first mode; and provide a second user interface different from the first user interface, in the second mode.

According to an exemplary embodiment, the display device further includes a communication module configured to communicate with an external electronic device, wherein the processor is configured to receive configuration setting information of the second mode from the external electronic device through the communication module; and change a configuration setting value of the display device to a configuration setting value of the second mode based on the configuration setting information of the second mode.

The processor is configured to if the configuration setting information of the second mode is received in the first mode, change the configuration setting value when the first mode is switched to the second mode.

The display device operating in a first mode or a second mode, wherein the first mode is a mode in which a dynamic image is displayed in a display, and wherein the second mode is a mode in which a static image is displayed in the display, the method includes sensing illuminance by using a first sensor; setting a first critical time based on the sensed illuminance; sensing movement by using a second sensor during the first critical time in the second mode; and if specified movement of an user is sensed within the first critical time in the second mode, displaying the static image in the display.

According to an exemplary embodiment, the method further includes if the movement of the user is not sensed during a second critical time in a state where the static image is displayed in the display, turning off the display.

The setting includes at least one of as the sensed illuminance becomes lower, increasing the first critical time; and as the sensed illuminance becomes higher, decreasing the first critical time.

The displaying includes if an object of a critical size or more moves more than a specified movement size, determining that the movement of the user is sensed.

According to an exemplary embodiment, the method further includes if a first user input is received in the first mode, operating in the second mode; and if a second user input is received in the first mode, turning off the display, the first sensor, and the second sensor.

According to an exemplary embodiment, the method further includes communicating with an external electronic device to receive configuration setting information of the second mode from the external electronic device; and changing a configuration setting value of the second mode based on the configuration setting information of the second mode.

According to an exemplary embodiment, the method further includes if the configuration setting information of the second mode is received in the first mode, changing a configuration setting value of the second mode when the first mode is switched to the second mode.

The term "module" as used in the present disclosure may represent, for example, a unit including one or more combinations of hardware, software and firmware. The term "module" may be interchangeably used with the terms "unit", "logic", "logical block", "component" and "circuit". The "module" may be a minimum unit of an integrated component or may be a part thereof. The "module" may be a minimum unit for performing one or more functions or a part thereof. The "module" may be implemented mechanically or electronically. For example, the "module" may include at least one of an application-specific IC (ASIC) chip, a field-programmable gate array (FPGA), and a programmable-logic device for performing some operations, which are known or will be developed.

At least a part of an apparatus (e.g., modules or functions thereof) or a method (e.g., operations) according to an exemplary embodiment may be, for example, implemented by instructions stored in a computer-readable storage media in the form of a program module. The instruction, when executed by a processor <NUM>, may cause the one or more processors to perform a function corresponding to the instruction. The computer-readable storage media, for example, may be the memory <NUM>.

A computer-readable recording medium may include a hard disk, a floppy disk, a magnetic media (e.g., a magnetic tape), an optical media (e.g., a compact disc read only memory (CD-ROM) and a digital versatile disc (DVD), a magneto-optical media (e.g., a floptical disk)), and hardware devices (e.g., a read only memory (ROM), a random access memory (RAM), or a flash memory). Also, a program instruction may include not only a mechanical code such as generated by a compiler but also a highlevel language code executable on a computer using an interpreter. The above hardware unit may be configured to operate via one or more software modules for performing an operation according to an exemplary embodiment, and vice versa.

A module or a program module according to an exemplary embodiment may include at least one of the above elements, or a part of the above elements may be omitted, or additional other elements may be further included. Operations performed by a module, a program module, or other elements may be executed sequentially, in parallel, repeatedly, or in a heuristic method. In addition, some operations may be executed in different sequences or may be omitted. Alternatively, other operations may be added.

Claim 1:
A display device (<NUM>) comprising:
a display (<NUM>);
a first sensor configured to sense movement;
a second sensor configured to sense illuminance; and
a processor (<NUM>) operatively connected with the display, the first sensor, and the second sensor,
an input interface configured to receive a user input,
wherein the processor is configured to:
operate in one of a first mode and a second mode, the first mode being a mode in which a dynamic image is displayed in the display, and the second mode being a mode in which a static image is displayed in the display or the display is turned off depending on whether a movement of a user is sensed by the first sensor, wherein the first sensor is an image sensor,
in response to a first user input received through the input interface in the first mode, operate in the second mode; and in response to a second user input received through the input interface in the first mode, turn off the display, the first sensor, and the second sensor,
set a first critical time period after a transition to the second mode from the first mode, for sensing the movement, the first critical time period being set based on the illuminance, such that in response to a lower illuminance the first critical time period is increased, and in response to a higher illuminance the first critical time period is decreased, and
in response to a movement of a user being sensed by the first sensor, in the second mode within the first critical time period, control the display to display the static image.