Display device and its control method

Abstract

A display device is provided capable of correcting image quality changes caused by prolonged use. The display device includes: a display panel; a communicator configured to communicate with a service device; and a controller configured to control the communicator to transmit operation information, including the total operating time of the display device and the operating temperature of the display device, to the service device; to receive image parameters from the service device via the communicator; to process image data based on the received image parameter data; and to transmit the processed image to the display panel. The image parameters may include at least one of the display panel's brightness level, contrast ratio, sharpness level, and color density.

Description

[0001] This application is a divisional application of Chinese national application (application number: 202010019771.0) entitled "Display device and control method thereof" filed on January 8, 2020.

[0002] Cross-reference to related applications

[0003] This application is based on and claims priority to Korean Patent Application No. 10-2019-0002201, filed on January 8, 2019, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0004] This disclosure relates to a display device and a control method thereof, and more specifically, to a display device and a control method thereof capable of correcting image quality degradation caused by prolonged use. Background Technology

[0005] A display device is an output device used to visually display received or stored image information to a user. Display devices are widely used in various settings, such as homes and commercial spaces.

[0006] Some examples of display devices are monitors connected to personal computers (PCs), server computers, etc.; portable computers; navigation terminals; televisions; Internet Protocol Television (IPTV); handheld terminals (e.g., smartphones, tablet PCs, personal digital assistants (PDAs), or cellular phones); various displays used to reproduce images of advertisements or movies in industrial settings; and various audio / video systems.

[0007] Display devices use various display panels to display images. For example, display panels may include light-emitting diode (LED) panels, organic light-emitting diode (OLED) panels, quantum dot light-emitting diode (OD-LED) panels, quantum dot display panels, liquid crystal display (LCD) panels, etc.

[0008] The performance of a display device deteriorates over time from the date of manufacture and with prolonged use by the user. For example, the intensity of light emitted from the display device (e.g., brightness) may decrease when the display device is used for an extended period. Furthermore, the colors of the images displayed on the display device may also change when the display device is used for an extended period. Summary of the Invention

[0009] Therefore, one aspect of this disclosure provides a display device capable of correcting image quality degradation caused by prolonged use.

[0010] Another aspect of this disclosure provides a display device capable of correcting both image degradation caused by prolonged use and image changes caused by short-term use.

[0011] Another aspect of this disclosure provides a display device capable of measuring changes in a displayed image and correcting changes in the image based on the measured changes.

[0012] Additional aspects of this disclosure will be set forth in part in the description which follows, and will be apparent in part from the description, or may be learned by practice of this disclosure.

[0013] According to one embodiment, a display device is provided, including: a display panel; a communicator configured to communicate with a service device; and a controller. The controller may be configured to control the communicator to send operation information, including the total operating time of the display device and the operating temperature of the display device, to the service device; receive image parameters from the service device via the communicator; process image data based on the received image parameter data; and send the processed image to the display panel. The image parameters may include at least one of the display panel's brightness level, contrast ratio, sharpness level, and color density.

[0014] The controller can also be configured to control the communicator to send environmental information, including the geographical location of the display device and the illuminance outside the display device, to the service device.

[0015] The display device may also include a user input device configured to acquire user input, and the controller may also be configured to control the communicator to send operation information to the service device based on user input acquired from the user input device for powering off the display device.

[0016] The display device may further include a user input device configured to acquire user input, and the controller may further be configured to: determine whether the total operating time of the display device is longer than or equal to a first predetermined time based on user input acquired from the user input device for powering off the display device, and control the communicator to send operation information to the service device based on the determination that the total operating time of the display device is longer than or equal to the first predetermined time.

[0017] The display panel may include a liquid crystal panel and a backlight unit, and the controller may also be configured to adjust the drive current to be supplied to the backlight unit after a second predetermined time has elapsed since the display device is powered on.

[0018] According to another embodiment, a display system is provided including a display device configured to display an image based on image parameters, and to send operation information including the total operating time and operating temperature of the display device to a service device; and the service device is configured to output updated data for updating the image parameters to correct for image quality degradation of the display device based on the received total operating time and operating temperature of the display device. The image parameters may include at least one of the display device's brightness level, contrast ratio, sharpness level, and color density.

[0019] The service device may include: a communication interface configured to communicate with a display device; a database including image parameters for correcting image quality degradation of the display device; and a processor configured to receive operation information from the display device via the communication interface and to send the image parameters for correcting image quality degradation of the display device to the display device via the communication interface.

[0020] The display device may include: a display panel; a first communicator configured to communicate with a service device; and a first controller configured to process image data based on image parameters and transmit the processed image data to the display panel. The first controller may also be configured to: control the first communicator to send operation information to the service device, and process the image data based on image parameters received from the service device via the first communicator.

[0021] The first controller can also be configured to control the first communicator to send environmental information, including the geographical location of the display device and the illuminance outside the display device, to the service device.

[0022] The display device may further include a user input device configured to acquire user input, and the first controller may further be configured to control the first communicator to send operation information to the service device based on user input acquired from the user input device for powering off the display device.

[0023] The display device may further include a user input device configured to acquire user input, and the first controller may further be configured to: determine whether the total operating time of the display device is longer than or equal to a first predetermined time based on user input acquired from the user input device for powering off the display device, and control the first communicator to send operation information to the service device based on the determination that the total operating time of the display panel is longer than or equal to the first predetermined time.

[0024] The display system may further include: a user device configured to communicate with the display device and a service device, wherein the user device may also be configured to: send user input to the display device in response to receiving user input for correcting image quality degradation of the display device, and the display device may display a predetermined image in response to receiving the user input from the user device.

[0025] The predefined image may include multiple regions with different colors, brightness levels, and color densities.

[0026] The user device may include: a camera; a second communicator configured to communicate with a display device and a service device; and a second controller configured to control the camera to capture images of the display device displaying predetermined images, and to control the second communicator to send the predetermined images of the display device to the service device.

[0027] The user device may also include a display, and the second controller may also be configured to control the display to display a predetermined image of the display device and a plurality of guide lines, and to control the camera to record the predetermined image of the display device based on the fact that the predetermined image of the display device is located within the plurality of guide lines.

[0028] The service device may include: a communication interface configured to communicate with a user device; a database including image parameters for correcting image quality degradation of a predetermined image displayed on a display device; and a processor configured to receive a predetermined image from the user device via the communication interface and to send the image parameters for correcting image quality degradation of the display device to the display device via the communication interface.

[0029] The user device may include: a camera; a second communicator configured to communicate with a display device and a service device; and a second controller configured to control the camera to capture images of the display device displaying a predetermined image, collect image information from multiple areas included in the predetermined image on the display device, and control the second communicator to send the image information to the service device.

[0030] Image information can include information about the color, brightness level, and color density of multiple regions.

[0031] The service device may include: a communication interface configured to communicate with a user device; a database including image parameters for correcting image quality degradation of the display device based on image information of the display device; and a processor configured to receive image information from the user device and send the image parameters for correcting image quality degradation of the display device to the user device.

[0032] According to another embodiment, a method for controlling a display device is provided, comprising: collecting operation information including the total operating time of the display device and the operating temperature of the display device; sending the operation information to a service device; receiving from the service device image parameters for correcting image quality degradation of the display device; processing image data based on the received image parameters; and displaying an image corresponding to the processed image data, wherein the image parameters may include at least one of the display device's brightness level, contrast ratio, sharpness level, and color density.

[0033] According to another embodiment, a display system is provided, including: a display device; and a service device, wherein the display device is configured to: display an image based on image parameters, and send operation information including the total operating time and operating temperature of the display device to the service device, and wherein the service device is configured to: generate update data for updating the image parameters of the display device based on the received total operating time and operating temperature of the display device, and send the update data to the display device. Attached Figure Description

[0034] The above and / or other aspects, features, and advantages of specific embodiments of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 The service apparatus and display apparatus according to an embodiment are shown;

[0036] Figure 2 This is an exploded perspective view of the display device according to an embodiment;

[0037] Figure 3 An example of a backlight unit included in a display device according to an embodiment is shown;

[0038] Figure 4 An example of a liquid crystal panel included in a display device according to an embodiment is shown;

[0039] Figure 5 The brightness of the light source according to the embodiment deteriorates based on the total operating time of the display device;

[0040] Figure 6 This illustrates the reduction in the expected lifespan of the light source relative to the operating temperature of the display device according to an embodiment;

[0041] Figure 7 This illustrates how the color gamut varies with the total operating time of the display device according to an embodiment.

[0042] Figure 8 The brightness of the light source according to the embodiment is shown to deteriorate relative to the continuous operation time of the display device;

[0043] Figure 9 This illustrates the configuration of the display device according to an embodiment;

[0044] Figure 10 The configuration of the service apparatus according to an embodiment is shown;

[0045] Figure 11 An example of an operation for correcting changes in image quality caused by prolonged use of a display device, according to an embodiment, is shown.

[0046] Figure 12 An example screen showing image correction settings displayed by a display device according to an embodiment is shown;

[0047] Figure 13 A flowchart illustrating an operation for correcting image quality changes caused by prolonged use of a display device, according to an embodiment;

[0048] Figure 14 A flowchart illustrating the operation of the service apparatus and display apparatus according to an embodiment;

[0049] Figure 15 A display device, a service device, and a user device are illustrated according to an embodiment;

[0050] Figure 16 The configuration of a user device according to an embodiment is shown;

[0051] Figure 17 An example of an operation for correcting changes in image quality caused by prolonged use of a display device, according to an embodiment, is shown.

[0052] Figure 18 An example is shown according to an embodiment of capturing the screen of a display device using a user device;

[0053] Figure 19 This illustrates another example of an operation for correcting image quality variations caused by prolonged use of a display device, according to an embodiment; and

[0054] Figure 20 Another example is shown, according to an embodiment, of capturing the screen of a display device using a user device. Detailed Implementation

[0055] The following detailed description is provided to assist those skilled in the art in understanding this disclosure; however, various variations, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent to those skilled in the art. The progression of the described operations is merely illustrative. Except for operations that must occur in a specific order, the order of operations is not limited to the order set forth herein and may be changed or modified as needed. Furthermore, for clarity and brevity, corresponding descriptions of known functions and structures may be omitted.

[0056] Embodiments will now be described in more detail below with reference to the accompanying drawings. However, embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided to make this disclosure more comprehensive and complete, and to fully convey the embodiments to those skilled in the art.

[0057] It should be understood that while the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish elements from one another. As used herein, the term "and / or" can include any and all combinations of one or more of the related listed items.

[0058] It should be understood that when a component is referred to as being "connected" or "coupled" to another component, the component may be directly connected or coupled to that other component, or there may be intermediate components. In contrast, when a component is referred to as being "directly connected" or "directly coupled" to another component, there may be no intermediate components.

[0059] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” as used herein may include the plural forms.

[0060] Throughout this disclosure, the expression "at least one of a, b or c" means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b and c, or variations thereof.

[0061] The operating principles and embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0062] Figure 1 The service apparatus and display apparatus according to an embodiment are shown.

[0063] like Figure 1 As shown, the display device 100 can be connected to the service device 200 via the network NT in a wired or wireless manner.

[0064] Display device 100 can process image signals received from the outside to display an image corresponding to the image signal. In the following text, display device 100 is assumed to be a television (TV). However, display device 100 can be implemented as one of various devices, such as a monitor, a portable multimedia device, a portable communication device, a portable computing device, etc. That is, the type of display device 100 is not limited to these, as long as display device 100 can visually display an image.

[0065] Furthermore, the display device 100 can be a large-format display (LFD) that can be installed in outdoor spaces such as the roof of a building or a bus stop. Outdoor spaces are not limited to open-air spaces, and the display device 100 can be installed anywhere with many people, such as subway stations, shopping malls, theaters, offices, shops, etc., even if the place is an indoor space.

[0066] The display device 100 can receive video data and audio signals from various content sources and output video and audio corresponding to the video data and audio signals. For example, the display device 100 can receive television broadcast content, content from a content playback device, or content from a content provider's content delivery server via a broadcast receiving antenna or wired cable.

[0067] The display device 100 may include: a main body 101 that houses a plurality of components for displaying an image; and a screen S disposed on one side of the main body 101 for displaying the image I.

[0068] The main body 101 can form the appearance of the display device 100, and components for enabling the display device 100 to display image I can be installed inside the main body 101. Figure 1 The main body 101 shown is in the shape of a flat plate; however, the shape of the main body 101 is not limited to that shown. Figure 1 The shape shown. For example, the body 101 can be in the shape of a curved plate, with its left and right sides protruding forward and its central portion being concave.

[0069] Screen S can be formed on the front side of the main body 101, and image I, as visual information, can be displayed on screen S.

[0070] The screen S may include multiple pixels P, and the image I displayed on the screen S may be formed by a combination of light emitted from the pixels P. For example, the light emitted from the pixels P may be combined like a mosaic to form the image I on the screen S.

[0071] Each pixel P can emit light of various brightness levels and colors.

[0072] In order to emit light at various brightness levels, each pixel P may include a component capable of emitting its own light (e.g., an organic light-emitting diode) or a component capable of transmitting or blocking light emitted from the backlight unit (e.g., a liquid crystal panel (LCD)).

[0073] To emit light of various colors, each pixel P can include multiple sub-pixels Psub1, Psub2, and Psub3. For example, sub-pixels Psub1, Psub2, and Psub3 can include red sub-pixels that emit red light, green sub-pixels that emit green light, and blue sub-pixels that emit blue light (collectively referred to as RGB pixels). As another example, each pixel P can include red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels that emit white light (collectively referred to as RGBW pixels). As yet another example, each pixel P can include red sub-pixels, green sub-pixels, blue sub-pixels, and yellow sub-pixels that emit yellow light (collectively referred to as RGBY pixels).

[0074] However, subpixel structures are not limited to the structures described above, and may include various other subpixel structures that are known or may become known in the future.

[0075] Display device 100 may include various types of display panels capable of displaying image I. For example, display device 100 may include a liquid crystal display (LCD) panel, a light-emitting diode (LED) panel, an organic light-emitting diode (OLED) panel, a quantum dot light-emitting diode display (OD-LED) panel, or a quantum dot display panel.

[0076] In the following description, a display device including an LCD panel will be used as an example of display device 100.

[0077] Network NT can include wired and wireless networks. Wired networks can include cable networks or telephone networks based on Ethernet (IEEE 802.3 standard) or the Internet. Wireless networks can be based on Wi-Fi (WiFi™, IEEE 802.11 standard), Bluetooth (Bluetooth™, IEEE 802.15.1 standard), or Zigbee (Zigbee™, IEEE 802.15.4 standard). Furthermore, wireless networks can include mobile communication service networks, such as Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access 2000 (CDMA2000), Wibro, Global Microwave Access Interoperability (WiMAX), Long Term Evolution (LTE), Wibro Evolution, etc. However, Network NT is not limited to the above examples and may include networks for communication services that may be implemented in the future.

[0078] For example, the network NT may include an access point (AP). The display device 100 can access the AP using short-range wireless communication standards, and the AP can access the Internet through a wired network provided by an Internet service provider. Short-range wireless communication may include communication methods such as Wi-Fi, Bluetooth, Zigbee, infrared communication, and ultra-wideband (UWB) communication. Furthermore, the AP may be replaced by a hub, router, switch, gateway, etc.

[0079] The service device 200 can be operated by the manufacturer, distributor or service agent of the display device 100.

[0080] The service device 200 may include a database that stores data related to changes in image quality caused by prolonged use of the display device 100, as well as parameters for correcting changes in image quality caused by prolonged use of the display device 100.

[0081] The service device 200 can receive operation information and environmental information from the display device 100 via the network HT, and determine the degree of image quality change caused by prolonged use of the display device 100 based on the operation information and environmental information of the display device 100. Furthermore, the service device 200 can output parameters for correcting image quality changes caused by prolonged use of the display device 100.

[0082] The service device 200 can operate as a cloud server. For example, the service device 200 can receive requests from the display device 100 over a network and, in response to the requests from the display device 100, provide the display device 100 with parameters for correcting image quality changes caused by prolonged use of the display device 100.

[0083] However, the service device 200 is not limited to a cloud server. For example, the network NT can be omitted, and the display device 100 can be directly connected to the service device 200. When the display device 100 is directly connected to the service device 200, the service device 200 can be a peripheral device of the display device 100, such as a desktop computer, a laptop computer, etc.

[0084] Figure 2 This is an exploded perspective view of a display device according to an embodiment. Figure 3 An example of a backlight unit included in a display device according to an embodiment is shown. Figure 4 An example of a liquid crystal panel included in a display device according to an embodiment is shown.

[0085] like Figure 2 As shown, various components for creating image I on screen S can be installed in body 101.

[0086] For example, the main body 101 may include: a backlight unit 110 for emitting surface light in a forward direction; a liquid crystal panel 120 for blocking or transmitting light emitted from the backlight unit 110; a control assembly 102 for controlling the operation of the backlight unit 110 and the liquid crystal panel 120; and a power supply assembly 103 for supplying power to the backlight unit 110 and the liquid crystal panel 120. Furthermore, the main body 101 may also include a frame 101a, a middle mold frame 101b, a base frame 101c, and a rear cover 101d for supporting the liquid crystal panel 120, the backlight unit 110, the control assembly 102, and the power supply assembly 103.

[0087] The backlight unit 110 may include a point light source for emitting monochromatic light or white light, and may refract, reflect and scatter light to convert the light emitted from the point light source into uniform surface light.

[0088] For example, such as Figure 3 As shown, the backlight unit 110 may include a light-emitting module 111 for generating light, a reflective sheet 112 for reflecting light, a diffuser plate 113 for diffusing light, and an optical sheet 114 for improving brightness.

[0089] The light-emitting module 111 may include multiple light sources 111a for emitting light, and a support member 111b for supporting / fixing the light sources 111a.

[0090] Light sources 111a can be uniformly arranged and emit light in a forward direction. Light sources 111a can be arranged in a predetermined pattern such that the light emitted from the light sources 111a has uniform brightness. More specifically, light sources 111a can be arranged such that the distance between the light sources is constant or equal.

[0091] When current is supplied or voltage is applied, each light source 111a can be capable of emitting monochromatic light (light with a predetermined wavelength, e.g., blue light) or white light (a mixture of light with multiple wavelengths) in various directions. For example, light source 111a may include LEDs with a small amount of heat generation.

[0092] The support member 111b can fix the light source 111a, so that the position of the light source 111a does not change. In addition, the support member 111b can supply power to the light source 111a to emit light. The support member 111b can be made of synthetic resin forming conductive power lines for fixing and supplying power to the light source 111a, or it can be implemented as a printed circuit board (PCB).

[0093] The reflector 112 can reflect light traveling forward from the light source 111a or light reflected backward from the diffuser 113. The reflector 112 can reflect light traveling backward from the diffuser 113, causing the light to travel in a forward direction or substantially in a forward direction.

[0094] Multiple through holes 112a can be formed in the reflector 112 to correspond to each light source 111a of the light-emitting module 111. Light emitted from the light source 111a of the light-emitting module 111 can pass through the through holes 112a and travel forward toward the reflector 112. Thus, the light source 111a can emit light forward toward the reflector 112.

[0095] The diffuser plate 113 can be located in front of the light-emitting module 111 and the reflector 112, and uniformly diffuses the light emitted from the light source 111a of the light-emitting module 111.

[0096] Although the light sources 111a are arranged at equal intervals on the rear surface of the backlight unit 110, uneven brightness may occur across the entire backlight unit 110 depending on the position of the light sources 111a.

[0097] The diffuser plate 113 can diffuse the light emitted from the light source 111a to eliminate the brightness non-uniformity caused by the light source 111a. In other words, non-uniform light from the light source 111a can be incident on the diffuser plate 113, and uniform light can be emitted from the front surface of the diffuser plate 113.

[0098] Optical sheet 114 may include various sheets to improve the brightness of backlight unit 110 and enhance brightness uniformity. For example, optical sheet 114 may include diffuser 114a, first prism sheet 114b, second prism sheet 114c, and reflective polarizer 114d.

[0099] The liquid crystal panel 120 can be located in front of the backlight unit 110 and can block or transmit light emitted from the backlight unit 110 to form image I.

[0100] As described above, the front surface of the liquid crystal panel 120 can form the screen S of the display device 100, and can include a plurality of pixels P. The pixels P included in the liquid crystal panel 120 can independently block or transmit light emitted from the backlight unit 110, and the light transmitted through the pixels P can form an image I displayed on the screen S.

[0101] For example, such as Figure 4 As shown, the liquid crystal panel 120 may include a first polarizing film 121, a first transparent substrate 122, a pixel electrode 123, a thin film transistor 124, a liquid crystal layer 125, a common electrode 126, a color filter 127, a second transparent substrate 128, and a second polarizing film 129.

[0102] The first transparent substrate 122 and the second transparent substrate 128 can fix and support the pixel electrode 123, the thin film transistor 124, the liquid crystal layer 125, the common electrode 126, and the color filter 127. The first transparent substrate 122 and the second transparent substrate 128 can be made of tempered glass or transparent resin.

[0103] A first polarizing film 121 and a second polarizing film 129 may be respectively disposed on the outer surfaces of the first transparent substrate 122 and the second transparent substrate 128.

[0104] Each of the first polarizing film 121 and the second polarizing film 129 can transmit predetermined light and block other light. For example, the first polarizing film 121 can transmit first polarized light and block other light. Furthermore, the second polarizing film 129 can transmit second polarized light and block other light. The first polarization direction of the first polarized light can be orthogonal to the second polarization direction of the second polarized light.

[0105] A color filter 127 may be disposed on the inner side of the second transparent substrate 128 (i.e., behind the second transparent substrate 128).

[0106] The color filter 127 may include a first filter 127a, a second filter 127b and a third filter 127c, and the first filter 127a, the second filter 127b and the third filter 127c may be arranged adjacent to each other.

[0107] The area forming the color filter 127 can correspond to the aforementioned pixel P. More specifically, the area forming the first filter 127a can correspond to the first sub-pixel Psub1, the area forming the second filter 127b can correspond to the second sub-pixel Psub2, and the area forming the third filter 127c can correspond to the third sub-pixel Psub3.

[0108] A thin-film transistor 124 can be disposed on the inner side of the second transparent substrate 128. Based on the on (closed) or off (open) state of the thin-film transistor 124, an electric field can be formed between the pixel electrode 123 and the common electrode 126, or the electric field formed between the pixel electrode 123 and the common electrode 126 can be removed.

[0109] A pixel electrode 123 may be disposed in front of the first transparent substrate 122, and a common electrode 126 may be disposed behind the second transparent substrate 128. More specifically, the pixel electrode 123 may be disposed on the upper surface of the first transparent substrate 122, and the common electrode 126 may be disposed on the lower surface of the color filter 127.

[0110] The pixel electrode 123 and the common electrode 126 can be made of conductive metal material and can form an electric field for changing the alignment of the liquid crystal molecules 125a constituting the liquid crystal layer 125.

[0111] A liquid crystal layer 125 can be formed between the pixel electrode 123 and the common electrode 126, and the liquid crystal layer 125 can be filled with liquid crystal molecules 125a.

[0112] Liquid crystals exist in an intermediate state between solid (crystal) and liquid. Liquid crystals can exhibit optical properties that change according to variations in an electric field. For example, the orientation of the liquid crystal molecules can change depending on the electric field.

[0113] When an electric field is formed in the liquid crystal layer 125, the liquid crystal molecules 125a of the liquid crystal layer 125 can be arranged according to the direction of the electric field. Conversely, when no electric field is formed in the liquid crystal layer 125, the liquid crystal molecules 125a can be arranged irregularly or according to the alignment layer. Therefore, the optical properties of the liquid crystal layer 125 can depend on the presence or absence of an electric field passing through the liquid crystal layer 125.

[0114] At the edge of the liquid crystal panel 120, a cable 120a for sending image data to the liquid crystal panel 120 and a display driver integrated (DDI) circuit (hereinafter referred to as "driver IC") 104 for processing image data and outputting analog image signals can be arranged.

[0115] Cable 120a can electrically connect control component 102 and / or power component 103 to driver IC 104, and electrically connect driver IC 104 to LCD panel 120.

[0116] The driver IC 104 can receive image data and power from the control component 102 and the power supply component 103 respectively via cable 120a, and send image data and drive current to the liquid crystal panel 120 via cable 120a.

[0117] The control component 102 may include control circuitry for controlling the operation of the liquid crystal panel 120 and the backlight unit 110. The control circuitry may process image data received from an external content source, send the image data to the liquid crystal panel 120, and send dimming data to the backlight unit 110.

[0118] The power supply assembly 103 can supply power to the liquid crystal panel 120 and the backlight unit 110, so that the backlight unit 110 outputs surface light, and the liquid crystal panel 120 blocks or transmits the light emitted from the backlight unit 110.

[0119] The control component 102 and the power supply component 103 can be implemented using a PCB and various circuits mounted on the PCB. For example, the power supply circuit may include capacitors, coils, resistors, a processor, and a power supply board on which capacitors, coils, resistors, and the processor are mounted. Furthermore, the control circuit may include a memory, a processor, and a control board on which the memory and the processor are mounted.

[0120] Figure 5 The brightness of the light source according to the embodiment deteriorates based on the total operating time of the display device. Figure 6This illustrates the reduction in the expected lifespan of the light source relative to the operating temperature of the display device according to an embodiment. Figure 7 The color gamut according to the embodiment varies with the total operating time of the display device. Figure 8 The brightness of the light source according to the embodiment is shown to deteriorate relative to the continuous operating time of the display device.

[0121] The display device 100 may include a backlight unit 110 for emitting light, and a liquid crystal panel 120 for blocking or transmitting light emitted from the backlight unit 110. Because the liquid crystal panel 120 blocks or transmits light emitted from the backlight unit 110, the display device 100 can display images with various colors and various brightness levels.

[0122] When manufactured as a product, the display device 100 can be designed to display the best image for the user. However, as the operating time of the display device 100 increases, the performance of the display device 100 may gradually degrade. In other words, as the operating time of the display device 100 increases over time, the image quality of the display device 100 may deteriorate.

[0123] The degradation of image quality on the display device 100 may be caused by various reasons.

[0124] For example, when the brightness of the light source 111a included in the backlight unit 110 deteriorates, the image quality of the display device 100 may deteriorate.

[0125] like Figure 5 As shown, as the total operating time of the display device 100 increases, the total operating time of the light source 111a can increase, and as the total operating time of the light source 111a increases, the intensity of the light emitted from the light source 111a can gradually decrease. Figure 5 As shown, when the operating time of light source 111a reaches 3000 hours, the brightness of light source 111a can be reduced by about 8% compared to the brightness of light source 111a when it is first operated.

[0126] The degradation of the brightness of light source 111a may be accelerated by an increase in operating temperature. In other words, at higher operating temperatures, the brightness of light source 111a may degrade more rapidly.

[0127] For example, it can be assumed that the lifespan of light source 111a ends when the brightness of light source 111a deteriorates by approximately 50% from the brightness of light source 111a when it first operates. Figure 6As shown, the lifespan of the light source 111a may be shorter at higher operating temperatures. The light source 111a has a lifespan of about 120,000 hours at a typical operating temperature of about 80°C for the display device 100, while it has a lifespan of about 40,000 hours at an operating temperature of about 110°C.

[0128] Thus, at the higher operating temperature of the display device 100, the brightness of the light source 111a may deteriorate more quickly.

[0129] When the brightness of the light source 111a deteriorates, the brightness of the image displayed on the display device 100 may deteriorate, and the contrast of the image may also deteriorate. Furthermore, when the brightness of the light source 111a deteriorates, the sharpness of the image displayed on the display device 100 may deteriorate, and the colors may become blurry. Therefore, when the brightness of the light source 111a deteriorates, the overall image quality of the display device 100 may deteriorate.

[0130] In addition, when the brightness of the light source 111a deteriorates, the color gamut of the display device 100 may also change.

[0131] For example, such as Figure 7 As shown, the display device 100 can be designed to represent the colors of the first color region R1 according to the International Organization for Standardization. However, due to the brightness degradation of the light source 111a, the color gamut that can be represented by the display device 100 may be biased towards the second color region R2 or the third color region R3.

[0132] As the operating time of the display device 100 increases, the performance of other optical components and the performance of the light source 111a may also deteriorate.

[0133] For example, the performance of the diffuser 113 included in the backlight unit 110 may deteriorate, thus the brightness of the backlight unit 110 may deteriorate, or the brightness uniformity of the backlight unit 110 may deteriorate. In addition, the performance of the optical sheet 114 included in the backlight unit 110 may deteriorate, thus the brightness of the backlight unit 110 may deteriorate.

[0134] Furthermore, the performance of the liquid crystal layer 125 included in the liquid crystal panel 120 may deteriorate, thus the brightness uniformity of pixel P may deteriorate. In addition, the performance of the color filter 127 included in the liquid crystal panel 120 may deteriorate, thus the color gamut of the display device 100 may change.

[0135] As the display device 100 continues to operate after being powered on (in other words, when the liquid crystal panel 120 and the backlight unit 110 start operating), the image quality of the display device 100 may deteriorate.

[0136] For example, such as Figure 8As shown, as the continuous operating time of the display device 100 increases, the brightness of the light source 111a included in the display device 100 may gradually deteriorate.

[0137] Specifically, at time T1, the display device 100 can be powered on, and after time T1, the brightness of the display device 100 may gradually decrease. At time T2, the display device 100 can be powered off. When the display device 100 is powered on again at time T3, the brightness of the display device 100 may return to its original brightness. After time T3, the brightness of the display device 100 may gradually decrease again. Subsequently, at time T4, the display device 100 can be powered off, and when the display device 100 is powered on again at time T5, the brightness of the display device 100 may return to its original brightness once more.

[0138] During a short period of continuous operation of the display device 100 (e.g., a few minutes or a few hours), the brightness of the display device 100 may gradually deteriorate.

[0139] As described above, the image quality of the display device 100 may degrade over a long period of time or within a short period of time. The display device 100 can compensate for the degradation of image quality together with the service device 200.

[0140] Figure 9 The configuration of the display device according to an embodiment is shown.

[0141] Inside the main body 101 of the display device 100, components for performing the functions of the display device 100 can be installed.

[0142] like Figure 9 As shown, the display device 100 may include: a user input device 130 for acquiring user input from a user; a content receiver 140 for receiving video data and / or audio signals from a content source; an image display 150 for displaying images; a sound output device 160 for outputting sound; a communicator 170 for communicating with the service device 200; a temperature sensor 181 for measuring the temperature of the image display 150; an illuminance sensor 182 for measuring the illuminance outside the display 100; and a controller 190 for processing the video data and / or audio signals received by the content receiver 140 and controlling the operation of the display device 100.

[0143] User input device 130 may include input buttons 131 for acquiring user input. For example, input buttons 131 may include a power button for turning the display device 100 on / off, a volume control button for enabling the user to control the volume of sound output from the display device 100, a source selection button for enabling the user to select a content source, etc.

[0144] The input button 131 can acquire user input and output an electrical signal (voltage or current) corresponding to the user input to the controller 190. The input button 131 can be implemented by various input devices, such as push switches, touch switches, dial pads, slide switches, toggle switches, etc.

[0145] User input device 130 may include signal receiver 132 for receiving remote control signals from remote controller 130a. Remote controller 130a, used to acquire user input, may be detached from display device 100. Remote controller 130a can acquire user input and transmit a wireless signal corresponding to the user input to display device 100. Signal receiver 132 can receive wireless signals from remote controller 130a and output an electrical signal (voltage or current) corresponding to the user input to controller 190.

[0146] The content receiver 140 may include: a receiving terminal 141 for receiving content, including video data and / or audio signals, from a content source; and a tuner 142.

[0147] The receiving terminal 141 can receive video data and audio signals from a content source via a cable. For example, the receiving terminal 141 may include, for example, a component (YPbPr / RGB) terminal, a composite video blanking and sync (CVBS) terminal, an audio terminal, a high-definition multimedia interface (HDMI) terminal, a universal serial bus (USB) terminal, etc.

[0148] Tuner 142 can receive broadcast signals from a broadcast receiving antenna or wired cable and extract the broadcast signal of the channel selected by the user from the broadcast signals. For example, tuner 142 can transmit the broadcast signal with a frequency corresponding to the user-selected channel from a plurality of broadcast signals received via the broadcast receiving antenna or wired cable, and block the remaining broadcast signals with other frequencies.

[0149] The content receiver 140 can receive video data and audio signals from the content source through the receiving terminal 141 and / or tuner 142, and output the video data and / or audio signals to the controller 190.

[0150] The image display 150 may include: a backlight unit 110 and a liquid crystal panel 120 for visually displaying images; a backlight driver 151 for driving the backlight unit 110; and a liquid crystal panel driver 152 for driving the liquid crystal panel 120.

[0151] The backlight driver 151 can perform local dimming to change the brightness level of the backlight unit 110 based on image data received from the controller 190. More specifically, the backlight driver 151 can provide drive current to the light-emitting module 111 of the backlight unit 110, causing the backlight unit 110 to emit light of different brightness levels at different locations. In other words, based on the image data received from the controller 190 requiring different brightness levels in the image, the backlight driver 151 can provide drive current to the light-emitting module 111 of the backlight unit 110, so that different positions or areas of the backlight unit 110 can be controlled to reflect the desired different brightness levels in the image.

[0152] The backlight driver 151 can obtain driving parameters from the controller 190 and provide a driving current (or driving voltage) to the backlight unit 110 according to the driving parameters. For example, the driving parameters may include a driving current gain. The backlight driver 151 can amplify the driving current to be provided to the backlight unit 110 according to the driving current gain.

[0153] The LCD panel 120 and the backlight unit 110 can be compared with the above reference. Figure 3 and Figure 4 The liquid crystal panel 120 and the backlight unit 110 described are the same.

[0154] The liquid crystal panel driver 152 can receive image data from the controller 190 and control the transmission or blocking of light by a plurality of pixels P included in the liquid crystal panel 120 based on the image data.

[0155] The LCD panel driver 152 may include the above reference. Figure 2 The description refers to the display driver IC104.

[0156] The plurality of pixels P of the liquid crystal panel 120 can be arranged in a plurality of rows and a plurality of columns, and the liquid crystal panel driver 152 may include: a gate driver for activating a pixel included in any of the plurality of rows of the liquid crystal panel 120; and a source driver for sending image data to the pixel activated by the gate driver.

[0157] The source driver can sequentially send image data to pixels included in the first row, pixels included in the second row, pixels included in the third row, ..., and pixels included in the nth row. The image data can include color and brightness information for each pixel P.

[0158] The source driver can convert image data into an analog voltage signal and provide the analog voltage signal to each pixel P. In this document, the voltage value of the analog voltage signal may depend on the transmittance of the liquid crystal panel 120 according to the voltage. More specifically, the source driver can transmit an analog voltage signal having a voltage value corresponding to the brightness information represented by the image data to the pixel P.

[0159] The backlight driver 151 can provide drive current (or drive voltage) to the backlight unit 110 in response to image data received from the controller 190.

[0160] In this way, the image display 150 can display images with various colors and contrasts corresponding to the image data from the controller 190.

[0161] The sound output device 160 may include a sound amplifier 161 for amplifying sound and a loudspeaker 162 for outputting the amplified sound in an audible manner. The loudspeaker 162 may convert the analog sound signal amplified by the sound amplifier 161 into sound (sound waves). For example, the loudspeaker 162 may include a diaphragm that vibrates according to an electro-sound signal, and sound waves may be generated by the vibration of the diaphragm.

[0162] The communicator 170 may include a wired communication module 171 for communicating with an external device (e.g., a service device) in a wired manner and a wireless communication module 172 for communicating with an external device in a wireless manner.

[0163] The wired communication module 171 can access the gateway via a cable connecting the display device 100 to the gateway of the Internet service provider. For example, the wired communication module 171 can communicate with the gateway via Ethernet. The wired communication module 171 can send data to / receive data from the service device 200 on the network via the gateway.

[0164] The wireless communication module 172 can wirelessly communicate with an access point (AP) (or user gateway) connected to an internet service provider's gateway. For example, the wireless communication module 172 can communicate with the AP via Wi-Fi, Bluetooth, or Zigbee. The wireless communication module 172 can send data to / receive data from the service device 200 on the network via the AP and gateway.

[0165] In this way, the communicator 170 can send data to / receive data from the service device 200 in response to control signals from the controller 190. The communicator 170 can transmit communication data received from an external device to the controller 190, and transmit communication data obtained from the controller 190 to an external device.

[0166] Temperature sensor 181 can measure the temperature of backlight unit 110 and output an electrical signal (voltage or current) corresponding to the temperature of backlight unit 110 to controller 190. Temperature sensor 181 can be a thermistor whose resistance value changes with temperature.

[0167] The illuminance sensor 182 can measure the illuminance outside the display device 100 and output an electrical signal (voltage or current) corresponding to the illuminance to the controller 190. The illuminance sensor 182 can be a photodiode that generates voltage or current based on the amount of incident light.

[0168] The controller 190 may include: an image processor 191 for processing content received by the content receiver 140 to generate image data and sound data; a memory 192 for recording and / or storing programs and data for processing the content; and a microcontroller 193 for controlling the operation of the display device 100 in response to user input received by the user input device 130.

[0169] The image processor 191 can decode video data received by the content receiver 140 to generate image data, and decode audio signals received by the content receiver 140 to generate sound data. The image data and sound data can be output to the image display 150 and the sound output device 160, respectively.

[0170] The image processor 191 can process video data based on various image parameters to generate image data.

[0171] Image parameters may include, for example, luminance level representing the brightness of an image, contrast ratio representing the ratio of luminance levels in dark areas to luminance levels in bright areas, sharpness level representing the sharpness of an image, color density representing the thickness (or lightness) of colors in an image, and color balance representing the balance between blue, green, and red. Furthermore, image parameters may also include: gamma, representing the non-linear relationship between the luminance level of the image data and the luminance level of the display device 100; color gamut, representing the range of colors that can be represented; and chromaticity, representing the sharpness of colors.

[0172] Image parameters are not limited to user-adjustable parameters, such as brightness level, contrast, sharpness level, color density, and color. Image parameters may also include hidden parameters that can be adjusted by after-sales service personnel of the manufacturer or designer of the display device 100. Hidden parameters may not be disclosed to the user and can be adjusted in factory mode through a verification process. For example, hidden parameters may include regional settings, tuner settings, country settings, target color gamut, signal format, service server address, encoder / decoder options, connector options, communication options, etc.

[0173] Image parameters can be preset by the designer of the display device 100, or can be set by the user.

[0174] Image processor 191 can generate image data based on preset or user-configurable parameters such as brightness level, contrast, sharpness level, color density, color, gamma, color gamut, and chroma.

[0175] The image processor 191 may include arithmetic circuits for performing logical and arithmetic operations, as well as storage circuits for storing the data processed.

[0176] The memory 192 can store programs and data for processing video data included in the content, and can also store temporary data that can be generated when the image processor 191 processes the video data.

[0177] The memory 192 can store image parameters that enable the image processor 191 to process video data. For example, the memory 192 can store preset or user-configurable parameters such as brightness level, contrast, sharpness level, color density, color, gamma, color gamut, and chroma. Furthermore, the memory 192 can store drive current gain for controlling the backlight driver 151.

[0178] The memory 192 may include non-volatile memory for storing data for long periods of time, such as read-only memory (ROM) and flash memory; and volatile memory for storing data temporarily, such as static random access memory (S-RAM) and dynamic random access memory (D-RAM).

[0179] The microcontroller 193 can control the display device 100 in response to user input received through the user input device 130.

[0180] For example, microcontroller 193 can control tuner 142 to extract the broadcast signal of the channel selected by user input for changing the channel. In response to user input for changing image parameters, microcontroller 193 can change the brightness level, contrast, sharpness level, color density, color, gamma, color gamut, and chroma stored in memory 192. Furthermore, microcontroller 193 can change the drive current gain stored in memory 192 in response to user input for changing drive parameters.

[0181] As the total operating time of the display device 100 increases, the image quality of the display device 100 may deteriorate. Users can input different settings to improve the image quality of the display device 100 in order to compensate for this deterioration.

[0182] The microcontroller 193 can acquire user input for improving the image quality of the display device 100 via the user input device 130. In response to the user input for improving the image quality of the display device 100, the microcontroller 193 can collect operational and environmental information of the display device 100, and control the communicator 170 to send the operational and environmental information of the display device 100, as well as requests for parameters for improving the image quality of the display device 100, to the service device 200.

[0183] According to an embodiment, the operation information may include identification information of the display device 100, the total operation time of the display device 100, the operating temperature of the display device 100, the driving current supplied to the backlight unit 110, and the image parameters currently applied to the display device 100. Environmental information may include the area where the display device 100 is installed and the external illuminance of the display device 100. However, the operation information and environmental information of the display device 100 sent to the service device 200 are not limited to the above information and may include various other information regarding the operating status of the display device 100 and its surrounding environment.

[0184] The service device 200 can output image parameters and driving parameters for improving the image quality of the display device 100 based on the operation information and environmental information received from the display device 100. The service device 200 can also send the image parameters and driving parameters for improving the image quality of the display device 100 to the display device 100.

[0185] The microcontroller 193 can receive image parameters and driving parameters from the service device 200 via the communicator 170, and store the received image parameters and driving parameters in the memory 192. The image processor 191 can generate image data based on the image parameters stored in the memory 192. In addition, the liquid crystal panel driver 152 and the backlight driver 151 can drive the liquid crystal panel 120 and the backlight unit 110 respectively based on the driving parameters stored in the memory 192.

[0186] The microcontroller 193 and the image processor 191 can be implemented as separate chips or integrated into a single chip.

[0187] In this way, the controller 190 can process video data included in the content to generate image data and control the display device 100 in response to user input. Furthermore, the controller 190 can obtain image parameters and driving parameters from the service device 200 for improving image quality.

[0188] Figure 10 The configuration of the service apparatus according to an embodiment of this disclosure is shown.

[0189] like Figure 10As shown, the service device 200 may include a communication interface 210, an information input device 220, a database 230, a processor 240, and a parameter output device 250.

[0190] The communication interface 210 can receive operation information / environment information and parameter requests from the display device 100, and send image parameters and driving parameters to the display device 100.

[0191] For example, the service device 200 can be connected to the Internet, which is a wide area network, and the communication interface 210 can receive operation information / environment information and parameter requests from the display device 100 via the Internet. Furthermore, the communication interface 210 can send image parameters and drive parameters to the display device 100 via the Internet.

[0192] The communication interface 210 can be electrically connected to the information input device 220, and can transmit the operation information / environment information and parameter requests of the display device 100 to the information input device 220. The communication interface 210 can also be electrically connected to the parameter output device 250, receive image parameters and drive parameters from the parameter output device 250, and send the image parameters and drive parameters to the display device 100.

[0193] The information input device 220 can receive operation information / environmental information and parameter requests from the display device 100 from the communication interface 210, and perform preparatory operations to enable the processor 240 to process the operation information and environmental information of the display device 100. For example, the information input device 220 can convert the operation information and environmental information of the display device 100 into a format that can be processed by the processor 240. In addition, the information input device 220 can transmit the operation information and environmental information to the processor 240 in the order in which the parameter requests are received.

[0194] Database 230 may include information about various models of display devices manufactured by various manufacturers.

[0195] Database 230 may include information about the degradation of the display device based on the display device's operating information and environmental information. For example, database 230 may include identification information of the display device, as well as information about the reduction in brightness and / or color change of the display device, wherein the reduction in brightness and / or color change depends on the total operating time and average temperature of the display device.

[0196] Information regarding the reduction in brightness and / or color change of the display device can be obtained experimentally or empirically. For example, the display device can be operated experimentally at various temperatures, and the designer of the display device can measure the reduction in brightness and / or color change of the display device based on the operating time of the display device using an optical measurement system. The brightness reduction and / or color change of the display device obtained experimentally or empirically can be stored in the service device 200.

[0197] Furthermore, database 230 may include information regarding the degradation of the display device based on its sales region. For example, Asia, Europe, North America, and South America may use different broadcast image compression standards. Therefore, display devices suitable for each region can be designed and sold. These regions may be under different temperature and humidity conditions, and due to these different regional temperature and humidity conditions, different image quality variations may occur depending on the total operating time of the display device. Database 230 may store information regarding these region-dependent image quality variations.

[0198] Database 230 may include image parameters and driving parameters for improving the image quality of the display device in response to information regarding brightness reduction and / or color changes of the display device and environmental information of the display device.

[0199] Image parameters and driving parameters corresponding to a decrease in brightness and / or a change in color of the display device can be obtained experimentally or empirically. For example, the designer of the display device can experimentally obtain image parameters and driving parameters for increasing brightness to compensate for the decrease in brightness and restoring colors to their original state to correct color changes. The image parameters and driving parameters of the display device obtained experimentally or empirically can be stored in the service device 200.

[0200] Database 230 may include image parameters and driving parameters capable of correcting brightness reduction and / or color changes of the display device. Database 230 may store image parameters and driving parameters for improving image quality of the display device and for correcting brightness reduction and / or color changes of the display device, based on the environment in which the display device is installed (e.g., the geographical location where the display device is installed and the external illuminance of the display device). For example, database 230 may include image parameters and driving parameters for correcting brightness reduction and / or color changes of the display device based on the geographical location where the display device is installed and the external illuminance of the display device.

[0201] Database 230 may include image parameters and driving parameters capable of correcting for brightness reduction and / or color changes of the display device based on the sales area of ​​the display device. For example, database 230 may include image parameters and driving parameters for correcting for brightness reduction and / or color changes of the display device taking into account the average temperature and average humidity of the sales area.

[0202] Furthermore, one display device may exhibit variations in brightness reduction and / or color change compared to another. For example, products of the same model may show variations in image quality depending on the manufacturing date or components. Database 230 may store information regarding these variations in brightness reduction and / or color change, wherein such variations may be generated for each product of the display device. Additionally, database 230 may include image parameters and driving parameters for correcting for brightness reduction and / or color change by reflecting the variations for each product.

[0203] The processor 240 can obtain the operation information and environmental information of the display device 100 from the information input device 220, and verify the operation information and environmental information of the display device 100.

[0204] The processor 240 can determine whether the operating information and environmental information of the display device 100 are within a predetermined range. For example, the processor 240 can determine whether the operating temperature of the display device 100 is within a predetermined temperature range, and when the processor 240 determines that the operating temperature of the display device 100 is outside the predetermined temperature range, the processor 240 can determine that the display device 100 is operating incorrectly. Therefore, the processor 240 can output a warning message indicating the incorrect operation of the display device 100.

[0205] When the processor 240 determines that the operation information and environmental information of the display device 100 are within a predetermined range, the processor 240 may continue to process the operation information and environmental information of the display device 100.

[0206] The processor 240 can use the operation information of the display device 100 to search the database 230 to obtain information about the brightness reduction and / or color change of the display device corresponding to the operation information of the display device 100.

[0207] The processor 240 can use environmental information of the display device 100 to search the database 230 to obtain image parameters and driving parameters corresponding to the decrease in brightness and / or color change of the display device 100. The processor 240 can obtain image parameters and driving parameters from the database 230 for correcting the decrease in brightness and / or color change of the display device 100.

[0208] The parameter output device 250 can receive image parameters and driving parameters for the display device 100 from the processor 240 and transmit the image parameters and driving parameters to the communication interface 210.

[0209] For example, parameter output device 250 can convert image parameters output from processor 240 into a format that can be processed by display device 100. Parameter output device 250 can generate update data for updating image parameters and driving parameters of display device 100.

[0210] The parameter output device 250 can transmit updated data to the communication interface 210.

[0211] The communication interface 210 can transmit the updated data output from the parameter output device 250 to the display device 100 via the network NT.

[0212] In this way, the service device 200 can receive operation information and environmental information from the display device 100, and obtain image parameters and driving parameters for correcting the brightness reduction and / or color change of the display device 100 based on the operation information and environmental information of the display device 100.

[0213] Figure 11 An example of an operation for correcting changes in image quality caused by prolonged use of a display device, according to an embodiment, is shown. Figure 12 An example screen showing image correction settings displayed by a display device according to an embodiment is shown.

[0214] In the following text, reference will be made to Figure 11 and Figure 12 This describes an operation 1000 for correcting changes in image quality caused by prolonged use of the display device 100.

[0215] In operation 1010, the display device 100 can obtain user input for image correction from the user.

[0216] After a user purchases the display device 100, the image quality of the display device 100 may gradually deteriorate as the total operating time of the display device 100 increases. Specifically, as the total operating time of the display device 100 increases, the image quality of the display device 100 may deteriorate due to a decrease in the intensity of light emitted from the light source 111a included in the backlight unit 110. Furthermore, the deterioration of the image quality of the display device 100 may be caused by the deterioration of the diffuser plate 113 and the optical sheet 114 included in the backlight unit 110. Additionally, the deterioration of the image quality of the display device 100 may be caused by stress on the liquid crystal layer included in the liquid crystal panel 120 and the deterioration of the color filter 127.

[0217] Users can provide user input to correct image quality degradation on the display device 100.

[0218] For example, in response to user input for image settings on display device 100, display device 100 may display, for example... Figure 12 The settings screen 500 and the picture settings screen 510 are shown.

[0219] Image settings screen 510 may include menus for adjusting image parameters. For example, image settings screen 510 may include a backlight menu 511 for adjusting the brightness of backlight unit 110, a contrast menu 512 for adjusting the contrast of the screen, a brightness menu 513 for adjusting the brightness level of the screen, a sharpness menu 514 for adjusting the sharpness level of the screen, a color density menu 515 for adjusting the color density of the screen, and a color menu 516 for adjusting the color of the screen.

[0220] In addition, the image settings screen 510 may include an auto-adjustment menu 517 for automatically adjusting image parameters.

[0221] Users can select the automatic adjustment menu 517 to correct the degradation of image quality of the display device 100 by using the user input device 130 of the display device 100 or the remote control 130a.

[0222] The controller 190 of the display device 100 can receive user input for correcting image quality degradation of the display device 100 via the user input device 130.

[0223] In this way, the display device 100 can correct for changes in image quality caused by prolonged use in response to user input. However, the conditions under which the display device 100 corrects for changes in image quality caused by prolonged use are not limited to this.

[0224] For example, whenever the total operating time of the display device 100 reaches a predetermined time period, the display device 100 can provide the user with an alarm to correct image quality changes caused by prolonged use. Specifically, whenever the total operating time of the display device 100 reaches, for example, 500 hours, 1000 hours, 1500 hours, and 2000 hours, the display device 100 can output a message indicating that the display device needs to correct for image quality changes via image or sound output. The user can check the message and provide user input to correct the degradation of image quality of the display device 100. Therefore, the display device 100 can guide the user to correct image quality changes at predetermined time intervals.

[0225] The display device 100 can determine whether its total operating time has reached a predetermined time period when it is powered on or off. When the display device 100 determines that its total operating time has reached the predetermined time period, it can provide an alarm to the user to correct image quality changes caused by prolonged use. For example, when the display device 100 is powered on / off, it can determine whether its total operating time has reached, for example, 500 hours, 1000 hours, 1500 hours, or 2000 hours. When the display device 100 determines that its total operating time has reached approximately 500 hours, 1000 hours, 1500 hours, or 2000 hours, it can output a message, via image or sound, indicating that the display device needs to correct image quality changes.

[0226] Alternatively, whenever the total operating time of the display device 100 reaches a predetermined time period, the display device 100 can automatically correct for image quality changes caused by prolonged use. For example, whenever the total operating time of the display device 100 reaches, for example, 500 hours, 1000 hours, 1500 hours, or 2000 hours, the display device 100 can request the service device 200 to send image parameters and driving parameters. Therefore, the display device 100 can correct for image quality changes at predetermined time periods based on the received image parameters and driving parameters.

[0227] Furthermore, whenever the display device 100 is powered off, it can still correct for image quality changes caused by prolonged use. When a user's operation to turn off is received via the user input device 130 or the remote control 130a, the display device 100 can request the service device 200 to send image parameters and drive parameters. Therefore, the display device 100 can correct for image quality changes while the screen is off, making the image quality correction potentially imperceptible to the user.

[0228] When the display device 100 is powered off, it can determine whether its total operating time has reached a predetermined time period. If it does, it can correct image quality changes caused by prolonged use. For example, when the display device 100 is powered on or off, it can determine whether its total operating time has reached approximately 500 hours, 1000 hours, 1500 hours, or 2000 hours. If it does, it can request the service device 200 to send image parameters and drive parameters. Therefore, the display device 100 can correct image quality changes at predetermined time intervals even when the screen is off, making the image quality correction imperceptible to the user.

[0229] During operation 1020, the display device 100 can collect operation information and environmental information of the display device 100.

[0230] The controller 190 can collect information about the operation of the display device 100 through various sensors and storage media installed in the display device 100.

[0231] For example, the identification information of the display device 100 can be pre-stored in the memory 192. The controller 190 can measure or calculate the total operating time of the display device 100 after its first operation and during operation, and can store the measured total operating time in the memory 192. The controller 190 can obtain the operating temperature of the display device 100 from the temperature sensor 181 during operation and can calculate the average operating temperature of the display device 100. Furthermore, the controller 190 can measure the driving current supplied to the light source 111a of the backlight unit 110 during operation. However, the above embodiment is not limited to this. For example, even when the display device is not operating, the controller 190 can obtain the operating temperature of the display device 100 from the temperature sensor 181.

[0232] In addition, the controller 190 can collect information about the environment of the display device 100 through various sensors and storage media installed in the display device 100.

[0233] For example, the controller 190 can store information about the area of ​​the sales display device 100, and obtain the illuminance outside the display device 100 from the illuminance sensor 182 when the display device 100 is operating. When the display device is not operating, the controller 190 can also obtain illuminance information from the illuminance sensor 182.

[0234] In operation 1030, the display device 100 may send a request for parameters for image correction of the display device 100 to the service device 200.

[0235] The controller 190 can control the communicator 170 to send a message to the service device 200 requesting image parameters and drive parameters for image correction of the display device 100. Furthermore, the controller 190 can control the communicator 170 to send the operation information and environmental information of the display device 100, along with the message requesting the image parameters and drive parameters, to the service device 200.

[0236] The communication interface 210 of the service device 200 can receive messages from the display device 100 for requesting image parameters and driving parameters, as well as operation information and environmental information of the display device 100.

[0237] In operation 1040, the service device 200 can acquire parameters for image correction of the display device 100.

[0238] The processor 240 of the service device 200 can process the operation information and environmental information of the display device 100 in response to a request for parameters from the display device 100.

[0239] The processor 240 can simultaneously input the operation information and environmental information of the display device 100 into the database 230, and obtain image parameters from the database 230 for correcting the brightness reduction and / or color change of the display device 100.

[0240] The processor 240 can input operation information of the display device 100 into the database 230, and retrieve information from the database 230 regarding brightness reduction and / or color changes of the display device 100 corresponding to the operation information of the display device 100. The processor 240 can also input environmental information of the display device 100, along with information regarding brightness reduction and / or color changes of the display device 100, into the database 230, and retrieve image parameters from the database 230 for correcting brightness reduction and / or color changes of the display device 100. Image parameters may include, for example, the brightness level, contrast ratio, sharpness level, color density, and color of the display device 100's screen.

[0241] Furthermore, the processor 240 can simultaneously input the operation information and environmental information of the display device 100 into the database 230, and obtain driving parameters from the database 230 for correcting brightness reduction and / or color changes in the display device 100. The driving parameters may include, for example, a driving current gain for amplifying the driving current supplied to the light source 111a of the backlight unit 110.

[0242] The service device 200 can convert image parameters and driving parameters into updated data for updating parameters of the display device 100.

[0243] In operation 1050, the service device 200 can send updated data from the display device 100 to the display device 100.

[0244] The communication interface 210 of the service device 200 can send update data for updating image parameters and driving parameters to the display device 100.

[0245] The controller 190 of the display device 100 can receive updated data via the communicator 170.

[0246] Then, in operation 1060, the display device 100 can update the image parameters and driving parameters.

[0247] The controller 190 can update the image parameters and drive parameters using the update data received from the service device 200. The controller 190 can extract the image parameters and drive parameters from the update data and store the extracted image parameters and drive parameters in the memory 192.

[0248] The display device 100 can display an image based on updated image parameters and driving parameters. The image processor 191 can process video data to generate image data based on updated image parameters stored in memory 192. The backlight driver 151 of the image display 150 can provide driving current to the light source 111a of the backlight unit 110 based on updated driving parameters stored in memory 192.

[0249] As described above, the display device 100 can, together with the service device 200, correct for image quality degradation caused by prolonged use of the display device 100. Therefore, the display device 100 can maintain the image quality of the display device 100 when the user first purchased it.

[0250] Specifically, compared to the display device 100, the service device 200 can have superior data processing and data storage capabilities. Therefore, the service device 200 can process various operational and environmental information from the display device 100, and store image parameters and driving parameters corresponding to these operational and environmental information.

[0251] Figure 13 A flowchart illustrating an operation for correcting image quality changes caused by prolonged use of a display device, according to an embodiment, is shown.

[0252] According to the above embodiments, the display device 100 can correct image quality changes caused by prolonged use by communicating with the service device 200 via the network NT. According to another embodiment, the display device 100 can still correct image quality changes automatically even when it cannot access the network NT.

[0253] In the following text, reference will be made to Figure 13 This describes operation 1100 for correcting changes in image quality caused by prolonged use of the display device 100.

[0254] In operation 1110, the display device 100 can obtain user input for image correction from the user.

[0255] Operation 1110 can be combined with Figure 11 The operation is the same as 1010.

[0256] In operation 1120, the display device 100 can determine whether the display device 100 can access the network NT.

[0257] The controller 190 can control the communicator 170 to send a request-response message. The controller 190 can then determine whether a response signal has been received through the communicator 170.

[0258] When a response signal is received, the controller 190 can determine that the display device 100 can access the network NT.

[0259] If no response signal is received within a predetermined time period, the controller 190 can determine that the display device 100 cannot access the network NT.

[0260] When controller 190 determines that display device 100 can access network NT ("Yes" in operation 1120), in operation 1130, display device 100 can connect to network NT and obtain image parameters and drive parameters from service device 200.

[0261] Display device 100 can collect operational and environmental information. Display device 100 can send requests for parameters for image correction to service device 200. Display device 100 can receive updated data, including image parameters and driving parameters, from service device 200.

[0262] In this way, the display device 100 can perform operations related to... Figure 11 The operations are the same as those for 1020, 1030, 1040 and 1050.

[0263] However, when the controller 190 determines that the display device 100 cannot access the network NT ("No" in operation 1120), in operation 1140, the display device 100 can obtain the total operating time and average operating temperature of the display device 100.

[0264] The controller 190 can obtain the total operating time and average operating temperature of the display device 100 through various sensors and storage media installed in the display device 100.

[0265] The controller 190 can measure the total operating time of the display device 100 after the first operation of the display device 100, and store the measured total operating time in the memory 192. The controller 190 can obtain the operating temperature of the display device 100 from the temperature sensor 181 during operation of the display device 100, and calculate the average operating temperature of the display device 100.

[0266] The controller 190 can obtain the total operating time and average operating temperature of the display device 100 from the memory 192.

[0267] In operation 1150, the display device 100 can acquire image parameters and driving parameters.

[0268] The controller 190 can obtain image parameters and drive parameters corresponding to the total operating time and average operating temperature of the display device 100 from the memory 192 for correcting changes in image quality.

[0269] Image parameters and driving parameters used to correct image quality changes caused by prolonged use can be pre-stored in memory 192. The image parameters and driving parameters can be pre-set experimentally or empirically by the designer of display device 100 and stored in memory 192 of display device 100.

[0270] In addition, the controller 190 can predict the brightness reduction and / or color change of the display device 100 based on the total operating time and average operating temperature of the display device 100, and calculate image parameters and driving parameters based on the predicted brightness reduction and / or color change.

[0271] In operation 1160, the display device 100 can update image parameters and driving parameters.

[0272] The controller 190 can update the image parameters and driving parameters of the current application using the acquired image parameters and driving parameters. The display device 100 can display the image based on the updated image parameters and driving parameters.

[0273] In this way, the display device 100 can correct for changes in image quality caused by prolonged use in response to user input. However, the conditions under which the display device 100 corrects for changes in image quality caused by prolonged use are not limited to this. The display device 100 can correct for changes in image quality caused by prolonged use whenever the total operating time of the display device 100 reaches a predetermined time period or whenever the display device 100 is powered off.

[0274] As described above, the display device 100 itself can correct for image quality degradation caused by changes in image quality. Therefore, the display device 100 can maintain the image quality of the display device 100 when the user first purchased it.

[0275] Figure 14 Another flowchart illustrating the operation of the service apparatus and display apparatus according to an embodiment is shown.

[0276] The above describes how the display device 100 corrects for changes in image quality caused by prolonged use. The display device 100 may experience slight degradation in brightness due to both short-term and long-term operation.

[0277] In the following text, reference will be made to Figure 14 This describes operation 1200 for correcting image quality changes caused by short-term use of the display device 100.

[0278] In operation 1210, the display device 100 can be turned on.

[0279] The display device 100 can be turned on in response to user input.

[0280] For example, the display device 100 can wait in an inserted state with the plug inserted into the socket. When an operation command is input via the user input device 130 or the remote control 130a in the inserted state, the display device 100 can be turned on.

[0281] More specifically, the display device 100 can supply power to the liquid crystal panel 120 and the backlight unit 110 in response to an operation command, and can display images through the operation of the liquid crystal panel 120 and the backlight unit 110.

[0282] In operation 1220, the display device 100 can determine whether the operation time elapsed after the display device 100 is turned on is longer than or equal to the reference time used to correct image quality.

[0283] The controller 190 can record or measure the time elapsed after the display device 100 starts operating (in other words, the time the display device 100 is turned on). Furthermore, the controller 190 can compare the recorded operating time of the display device 100 with a reference time used to correct image quality.

[0284] When the display device 100 determines that the operation time of the display device 100 is shorter than the reference time used to correct the image quality ("No" in operation 1220), the display device 100 may repeatedly compare the operation time with the reference time.

[0285] When the display device 100 determines that the operation time of the display device 100 is longer than or equal to the reference time used to correct the image quality ("yes" in operation 1220), the display device 100 can acquire the driving parameters in operation 1230.

[0286] The controller 190 can retrieve from the memory 192 driving parameters for correcting changes in image quality, corresponding to the operating time of the display device 100 that has elapsed since the display device 100 was turned on.

[0287] The driving parameters used to correct image quality changes caused by short-term use of the display device 100 may have been pre-stored in the memory 192. These driving parameters may have been pre-set experimentally or empirically by the designer of the display device 100 and stored in the memory 192 of the display device 100. Furthermore, the service device 200 can receive and update driving parameters for correcting image quality changes caused by short-term use of the display device 100, as well as driving parameters for correcting image quality changes caused by long-term use of the display device 100.

[0288] Furthermore, the controller 190 can predict the brightness reduction and / or color change of the display device 100 based on the operating time of the display device 100 after it is turned on, and calculate driving parameters for correcting the predicted brightness reduction and / or color change.

[0289] In operation 1240, the display device 100 can update the drive parameters.

[0290] The controller 190 can update the driving parameters of the current application using the acquired driving parameters. The display device 100 can then drive the backlight unit 110 according to the updated driving parameters.

[0291] In operation 1250, the display device 100 can update the reference time used to correct image quality.

[0292] The controller 190 can update the driving parameters used to correct image quality changes caused by short-term use of the display device 100, and then the controller 190 can update the reference time to additionally correct for image quality changes. For example, the controller 190 can update the reference time to the sum of the reference time and the additional time as the new reference time, wherein the additional time may be equal to the reference time.

[0293] Subsequently, the display device 100 can determine whether the operation time of the display device 100 after it has been turned on is longer than or equal to the reference time used to correct the image quality.

[0294] In this way, the display device 100 can correct for image quality changes caused by short-term use at predetermined intervals (e.g., at reference intervals). Therefore, the display device 100 can correct for image quality changes that may occur when the display device 100 is in the on state.

[0295] Figure 15 A display device, a service device, and a user device are shown according to an embodiment. Figure 16 The configuration of a user device according to an embodiment is shown.

[0296] like Figure 15 As shown, the display device 100 can be connected to the service device 200 and the user device 300 via the network NT in a wired or wireless manner.

[0297] Here, the display device 100 and the service device 200 can be respectively connected to Figure 1 The display device 100 shown is the same as the service device 200.

[0298] User device 300 can be a computing device operated by a user of display device 100. For example, user device 300 can be a handheld terminal, multimedia terminal, personal digital assistant (PDA), tablet computer, laptop computer, smartwatch, smart glasses, etc.

[0299] User device 300 can communicate with display device 100 via network NT or via peer-to-peer (P2P) communication.

[0300] User device 300 can obtain user input from a user for calibrating the image of display device 100, or can receive user input from display device 100 for calibrating the image of display device 100. User device 300 can capture a picture of the screen of display device 100 in response to user input, and send the image obtained by capturing the screen of display device 100 to service device 200.

[0301] The service device 200 can determine the image quality variation of the display device 100 by receiving images obtained by capturing the screen of the display device 100 from the user device 300, and provide parameters for correcting the image quality variation to the user device 300 or the display device 100.

[0302] like Figure 16As shown, the user device 300 may include: a communicator 310 for communicating with the display device 100 and the service device 200; a camera 320 for capturing images of objects; a touch screen 330 for interacting with the user; and a controller 340 for controlling the operation of the user device 300.

[0303] The communicator 310 may include a wireless communication module 311 for communicating wirelessly with external devices.

[0304] The wireless communication module 311 can send / receive data to / from an external device via mobile communication. The wireless communication module 311 can use mobile communication methods such as TDMA, CDMA, WCDMA, CDMA2000, Wibro, WiMAX, LTE, Wibro Evolution, etc.

[0305] The wireless communication module 311 can send / receive data to / from external devices using short-range wireless communication. The wireless communication module 311 can use communication methods such as Wi-Fi, Bluetooth, Zigbee, infrared communication, UWB communication, etc.

[0306] In this way, the communicator 310 can send / receive data to / from the display device 100 and the service device 200 in response to control signals from the controller 340. The communicator 310 can transmit communication data received from external devices to the controller 340, and send communication data obtained from the controller 340 to external devices.

[0307] Camera 320 may include multiple photodiodes for converting light signals into electrical signals. The photodiodes may be arranged in multiple rows and columns. Each photodiode can receive light and output an electrical signal representing the intensity of the received light.

[0308] Camera 320 can acquire an image including an electrical signal output from a photodiode and output the acquired image to controller 340. Camera 320 may include, for example, a charge-coupled device (CCD) image sensor or a complementary metal-oxide-semiconductor (CMOS) image sensor.

[0309] In this way, the camera 320 can take pictures of the screen S of the display device 100 in response to the control signal of the controller 340, and transmit the image obtained by taking pictures of the screen S to the controller 340.

[0310] The touchscreen 330 may include a touchpad 331 and a display 332.

[0311] The touchpad 331 can acquire user input via touch. For example, the touchpad 331 can acquire user input for correcting changes in image quality or for capturing images of the screen S of the display device 100.

[0312] The touchpad 331 can output an electrical signal corresponding to the acquired user input to the controller 340.

[0313] The display 332 can receive image data from the controller 340 and display an optical image corresponding to the image data. For example, the display 332 can display an image of the screen S captured by the camera 320.

[0314] The controller 340 may include: a processor 341 for outputting control signals for controlling the operation of the user device 200 in response to user input; and a memory 342 for memorizing and / or storing programs and data for controlling the operation of the user device 300.

[0315] The processor 341 can generate control signals for controlling the communicator 310, camera 320 and touch screen 330 in response to user input acquired through the touch screen 330.

[0316] For example, the processor 341 can acquire user input for compensating for image quality degradation of the display device 100 via the touchscreen 330. In response to the user input, the processor 341 can output a communication control signal to the communicator 310 for sending a message representing user input for image correction to the display device 100.

[0317] Furthermore, the processor 341 can receive a response signal from the display device 100 via the communicator 310. In response to this response signal, the processor 341 can output a shooting control signal to the camera 320 for shooting the screen S of the display device 100.

[0318] The memory 342 can record and / or store programs and data used to control the communicator 310, camera 320 and touch screen 330.

[0319] In addition, the memory 342 can temporarily store user input obtained through the touch screen 330 and temporarily store images obtained by the camera 320.

[0320] The memory 342 may include volatile memory such as S-RAM and D-RAM, as well as non-volatile memory such as ROM, EPROM and flash memory.

[0321] In this way, the controller 340 can control the operation of the communicator 310, the camera 320 and the touch screen 330 based on user input obtained through the touch screen 330.

[0322] Figure 17 An example of an operation for correcting changes in image quality caused by prolonged use of a display device, according to an embodiment, is shown. Figure 18 An example is shown according to an embodiment of capturing the screen of a display device using a user device.

[0323] In the following text, reference will be made to Figure 17 and Figure 18 This describes operation 1300 for correcting changes in the image quality of the display device 100 caused by prolonged use of the display device 100.

[0324] In operation 1310, user device 300 can obtain user input for image correction from the user.

[0325] As the total operating time of the display device 100 increases after the user purchases it, the image quality of the display device 100 may gradually deteriorate.

[0326] The user can provide user input to the user device 300 to mitigate the degradation of image quality of the display device 100. For example, the user device 100 can display an image settings screen for image settings of the display device 100 on the touch screen 330, and the user can provide user input to the touch screen 330 to correct changes in image quality caused by prolonged use of the display device 100.

[0327] The controller 340 of the user device 300 can obtain user input for image correction from the user via the touch screen 330.

[0328] In operation 1320, user device 300 can send user input for image correction to display device 100.

[0329] The controller 340 of the user device 300 can control the communicator 310 to send user input for image correction to the display device 100. The display device 100 can receive user input for image correction via the communicator 170.

[0330] In operation 1330, the display device 100 can display an image 600 for image correction.

[0331] By receiving user input for image correction, the controller 190 of the display device 100 can control the image display 150 to display the image 600 for image correction.

[0332] The image 600 used for image correction may include multiple regions, namely, regions 600-1, 600-2, 600-3, ..., 600-n. These multiple regions 600-1, 600-2, 600-3, ..., 600-n may have different colors, different brightness levels, and different color densities. For example, as... Figure 18 As shown, the first region 600-1 can display white, the second region 600-2 can display yellow, and the third region 600-3 can display blue-green. Furthermore, the nth region 600-n can display black.

[0333] In operation 1340, the display device 100 may send a response signal to the user device 300.

[0334] The controller 190 of the display device 100 can control the communicator 170 to send a response signal to the user device 300 indicating that an image 600 for image correction has been displayed. The user device 300 can receive the response signal from the display device 100 via the communicator 310.

[0335] In operation 1350, user device 300 can capture images of the screen S of display device 100.

[0336] By receiving the response signal from the display device 100, the controller 340 of the user device 300 can control the camera 320 to acquire images.

[0337] Furthermore, the controller 340 can control the touchscreen 330 to display images acquired by the camera 320. For example, as Figure 18 As shown, the touchscreen 330 can display an image 610 captured by the camera 320 of the screen S of the display device 100. Furthermore, the touchscreen 330 can display a plurality of guide lines 620 for guiding the position of the captured image 610 of the screen S of the display device 100.

[0338] The user can adjust the position and / or orientation of the user device 300 so that the captured image 610 of the screen S of the display device 100 is located within the boundary defined by the multiple guide lines 620.

[0339] When the user adjusts the position and / or orientation of the user device 300, the controller 340 can determine whether the captured image 610 on the screen S is located at a predetermined position in the image acquired by the camera 320. In other words, the controller 340 can determine whether the captured image 610 on the screen S is located within the boundary of the guide line 620.

[0340] For example, the controller 340 can detect the edges of the captured image 610 of the screen S of the display device 100 using an edge detection algorithm, and determine whether the detected edges are located within the boundary of the guide line 620. When the detected edge is located within the guide line 620, the controller 340 can determine whether there is a dividing line in the detected edge that divides multiple regions 600-1, 600-2, 600-3, ..., 600-n included in the image 600 used for image correction. When the controller 340 determines that there is a dividing line in the detected edge, the controller 340 can determine that the captured image 610 of the screen S of the display device 100 is located within the boundary of the guide line 620.

[0341] When the captured image 610 of the screen S of the display device 100 is in a predetermined position, the controller 340 can control the camera 320 to record the image acquired by the camera 320. In other words, the controller 340 can control the camera 320 to capture images of the screen S of the display device 100.

[0342] In operation 1360, user device 300 can send the captured image 610 obtained by capturing the screen S of display device 100 to display device 100.

[0343] The controller 340 of the user device 300 can control the communicator 310 to send the captured image 610 of the screen S to the display device 100. The display device 100 can receive the captured image 610 of the screen S through the communicator 170.

[0344] In operation 1370, the display device 100 may send a request for parameters for image correction of the display device 100 to the service device 200.

[0345] The controller 190 of the display device 100 can control the communicator 170 to send a message to the service device 200 requesting image parameters and drive parameters for image correction of the display device 100. Furthermore, the controller 190 can control the communicator 170 to send the captured image 610 of the screen S along with the message requesting the image parameters and drive parameters to the service device 200. Additionally, the display device 100 can selectively send its operating information and environmental information, along with the captured image 610 of the screen S, to the service device 200.

[0346] The communication interface 210 of the service device 200 can receive messages from the display device 100 for requesting image parameters and driving parameters, as well as captured images 610 on the screen S.

[0347] In operation 1380, the service device 200 can acquire parameters for image correction of the display device 100.

[0348] The processor 240 of the service device 200 can process the captured image 610 of the screen S of the display device 100 in response to a message received from the display device 100 requesting image parameters and driving parameters.

[0349] For example, the information input device 220 can acquire the captured image 610 of the screen S via the communication interface 210. The information input device 220 can extract information about the color, brightness level, and color density at predetermined locations from the captured image 610 of the screen S. The information input device 220 can extract information about the color, brightness level, and color density of each of the plurality of regions 610-1, 610-2, 610-3, ..., 610-n included in the captured image 610 of the screen S. The color, brightness level, and color density of each of the plurality of regions 610-1, 610-2, 610-3, ..., 610-n included in the captured image 610 of the screen S can be substantially the same as the color, brightness level, and color density of the corresponding regions of the plurality of regions 600-1, 600-2, 600-3, ..., 610-n of the image 600 displayed on the display device 100 for image correction. The information input device 220 can transmit the extracted information about color, brightness level and color density to the processor 240.

[0350] Processor 240 can provide information about color, brightness level, and color density to database 230 to search for information about brightness reduction and / or color changes in display device 100. Database 230 may include information about brightness reduction and / or color changes in display device 100 corresponding to the color, brightness level, and color density of the image 600 displayed on display device 100 for image correction. Processor 240 can obtain information about brightness reduction and / or color changes in display device 100 from database 230.

[0351] Processor 240 can use information about brightness reduction and / or color change of display device 100 to search database 230 to obtain image parameters and driving parameters corresponding to the brightness reduction and / or color change of display device 100. Database 230 may include image parameters and driving parameters for correcting various brightness reductions and various color changes of display device 100. Processor 240 can obtain image parameters and driving parameters from database 230 for correcting brightness reduction and / or color change of display device 100.

[0352] The parameter output device 250 can receive image parameters and driving parameters for the display device 100 from the processor 240, and generate update data for updating the image parameters and driving parameters of the display device 100.

[0353] In operation 1390, the service device 200 can send updated data from the display device 100 to the display device 100.

[0354] The communication interface 210 of the service device 200 can send update data for updating image parameters and driving parameters to the display device 100.

[0355] In operation 1395, the display device 100 can update image parameters and driving parameters.

[0356] The controller 190 can update the image parameters and drive parameters using the update data received from the service device 200. The controller 190 can extract the image parameters and drive parameters from the update data and store the extracted image parameters and drive parameters in the memory 192.

[0357] In this way, the display device 100 can correct image quality changes in response to user input received through the user device 300. However, the conditions under which the display device 100 corrects image quality changes are not limited to this. For example, the display device 100 can acquire user input through the user input device 130 or the remote control 130a, and correct image quality changes in response to the user input.

[0358] Figure 19 This illustrates another example of an operation for correcting changes in image quality caused by prolonged use of a display device, according to an embodiment. Figure 20 Another example is shown, according to an embodiment, of capturing the screen of a display device using a user device.

[0359] In the following text, reference will be made to Figure 19 and Figure 20 This describes operation 1400 for correcting changes in the image quality of the display device 100 caused by prolonged use of the display device 100.

[0360] In operation 1410, user device 300 can obtain user input for image correction from the user. In operation 1420, user device 300 can send the user input for image correction to display device 100. In operation 1430, display device 100 can display the image for image correction. Then, in operation 1440, display device 100 can send a response signal to user device 300.

[0361] Operations 1410, 1420, 1430, and 1440 can be respectively connected with... Figure 17Operations 1310, 1320, 1330, and 1340 shown are identical. The display device 100 can display an image 700 for image correction, comprising multiple regions 700-1, 700-2, 700-3, ..., 700-n, wherein the multiple regions 700-1, 700-2, 700-3, ..., 700-n can have different brightness levels and different color densities.

[0362] In operation 1450, user device 300 can capture images of the screen S of display device 100.

[0363] By receiving a response signal from the display device 100, the controller 340 of the user device 300 can control the camera 320 to acquire an image. When the image 700 displayed on the screen S of the display device 100 is within the boundaries of the plurality of guide lines 720, the controller 340 can control the camera 320 to record the image acquired by the camera 320. In other words, the controller 340 can control the camera 320 to capture images of the screen S of the display device 100.

[0364] The controller 340 can analyze the captured image 710 obtained by capturing images of the screen S. The controller 340 can extract information about the color, brightness level, and color density of predetermined positions P1, P2, P3, ..., Pn in the captured image 710 of the screen S, such as... Figure 20 As shown. The controller 340 can extract information about the color, brightness level and color density of each of the regions 710-1, 710-2, 710-3, ..., 710-n in the captured image 710 included on the screen S.

[0365] In operation 1460, user device 300 may send a request for parameters for image correction of display device 100 to service device 200.

[0366] The controller 340 of the user device 300 can control the communicator 310 to send a message to the service device 200 requesting image parameters and drive parameters for image correction of the display device 100. Furthermore, the controller 340 can control the communicator 310 to send information about the color, brightness level, and color density of the captured image 710 on the screen S, as well as a message requesting image parameters and drive parameters.

[0367] The communication interface 210 of the service device 200 can receive messages from the user device 300 for requesting image parameters and driving parameters, as well as information about the color, brightness level, and color density of the captured image 710 on the screen S.

[0368] In operation 1470, the service device 200 can acquire parameters for image correction of the display device 100.

[0369] Processor 240 can use information about the color, brightness level, and color density of the captured image 710 of screen S to search database 230 to obtain image parameters and driving parameters for correcting brightness reduction and / or color changes in display device 100. Processor 240 can obtain image parameters and driving parameters from database 230 for correcting brightness reduction and / or color changes in display device 100.

[0370] The parameter output device 250 can generate update data for updating the image parameters and drive parameters of the display device 100.

[0371] In operation 1480, the service device 200 may send the updated data of the display device 100 to the user device 300, and in operation 1490, the user device 300 may send the updated data of the display device 100 to the display device 100.

[0372] In operation 1495, the display device 100 can update image parameters and driving parameters.

[0373] Operation 1495 can be combined with Figure 17 The operation shown in the figure is the same as 1395.

[0374] As described above, the user device 300 can capture a predetermined image to be displayed on the display device 100, and the service device 200 can generate parameters for correcting image quality variations on the display device 100 based on the captured image. Therefore, the display device 100 can provide the user with optimal image quality.

[0375] According to one aspect of this disclosure, a display device capable of correcting image quality changes caused by prolonged use can be provided.

[0376] According to another aspect of this disclosure, a display device capable of correcting image changes caused by prolonged use and image changes caused by short-term use can be provided.

[0377] According to another aspect of this disclosure, a display device may be provided that is capable of measuring changes in a displayed image and correcting changes in the image based on the measured changes.

[0378] Embodiments of this disclosure have been described above. In the above embodiments, some components may be implemented as "modules". In this document, the term "module" may refer to, but is not limited to, a software and / or hardware component capable of performing a specific task, such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). Modules may advantageously be configured to reside on an addressable memory medium and may be configured to execute on one or more processors.

[0379] Therefore, for example, modules can include components such as software components, object-oriented software components, class components, and task components; procedures, functions, properties, programs, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The operations provided in components and modules can be combined into fewer components and modules, or further divided into additional components and modules. Additionally, components and modules can be implemented to enable the execution of one or more CPUs in the device.

[0380] In addition to the embodiments described above, embodiments can be implemented by computer-readable code / instructions on / on a medium such as a computer-readable medium to control at least one processing element. The medium can correspond to any medium / media that allows storage and / or transmission of computer-readable code.

[0381] Computer-readable code can be recorded on a medium or transmitted via the Internet. The medium can include read-only memory (ROM), random access memory (RAM), optical disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical recording media. Furthermore, the medium can be a non-volatile computer-readable medium. The medium can also be a distributed network, enabling the computer-readable code to be stored or transmitted and executed in a distributed manner. Further, as an example, the processing element can include at least one processor or at least one computer processor, and the processing element can be distributed and / or included in a single device.

[0382] Although embodiments have been described in a limited manner, those skilled in the art who benefit from this disclosure will recognize that other embodiments can be derived without departing from the scope of this disclosure.

Claims

1. A mobile device comprising: a camera; a communicator; and a processor configured to: control the communicator to transmit a first communication signal for displaying a predetermined image to an external display device, the predetermined image including a plurality of regions having different colors, different brightness levels, and different color densities, control the camera to acquire the predetermined image displayed on the external display device, control the communicator to transmit a second communication signal for requesting data for image correction of the external display device to an external server, the data for image correction based on the acquired predetermined image, receive the data for image correction of the external display device from the external server via the communicator, and control the communicator to transmit the data for image correction of the external display device to the external display device, the data for image correction corresponding to information of the acquired predetermined image. 2.The mobile device of claim 1, further comprising a touch screen, the processor is further configured to control the communicator to transmit the first communication signal based on receiving a user input signal from the touch screen. update an image parameter of the external display device based on the data for image correction. the image parameter includes at least one of a brightness level, a contrast, a sharpness level, and a color density of the external display device. wherein the processor is further configured to control the communicator to transmit a second communication signal including information on the acquired predetermined image.

3. The mobile device of claim 1, wherein, the information on the acquired predetermined image includes at least one of a color, a brightness level, and a color density of the acquired predetermined image.

4. The mobile device of claim 3, wherein, the processor is further configured to receive a response signal from the external display device in response to a user input for requesting the image correction, and control the camera to acquire the predetermined image based on receiving the response signal from the external display device.

5. The mobile device of claim 1, wherein, 8.A display device comprising:

6. The mobile device of claim 5, wherein, a display; 7. The mobile device of claim 1, wherein, a communicator; and a processor configured to: receive a first communication signal for image correction from a mobile device via the communicator, based on receiving the first communication signal, control the display to display a predetermined image, the predetermined image including a plurality of regions having different colors, different brightness levels, and different color densities, receive a second communication signal including data for image correction from the mobile device via the communicator, receive the data for image correction from a server via the communicator, perform image correction based on the data for image correction, the data based on a predetermined image acquired by the mobile device, and control the display to display an image corrected based on the data for the image correction. the processor is further configured to: based on receiving the data for image correction, update an image parameter based on the data for image correction. the image parameter includes at least one of a brightness level, a contrast, a sharpness level, and a color density of the display device. a user inputter configured to acquire a user input. ​ 9. The display device of claim 8, wherein, ​ ​ 10. The display device of claim 9, wherein, ​ 11. The display device of claim 8, further comprising: ​ The processor is further configured to send a response signal to the mobile device in response to the user input for requesting the image correction, so that the mobile device acquires the predetermined image based on receiving the response signal.

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