KR102524559B1 - Apparatus and method for screen correcting of external display device - Google Patents

Abstract

According to various embodiments, an apparatus for calibrating a screen of an external display device includes: a camera and a communication module communicatively connected to the external display device; First correction data for correcting the screen is generated using first image data for each pixel of each of the divided images of the first image displayed on the external display device obtained by using the camera, and the first correction data Provided to the display device, a second correction for correcting the screen using second image data for each pixel of a second image corresponding to the first correction data displayed on the display device obtained using the camera It can include a processor configured to generate data. Other embodiments are possible.

Description

Screen correction device and method of external display device {APPARATUS AND METHOD FOR SCREEN CORRECTING OF EXTERNAL DISPLAY DEVICE}

Various embodiments relate to an apparatus and method for calibrating a screen of an external display device.

Keeping color and luminance (brightness) uniform in a display device is the most important factor in picture quality. Recently, as the quality level required for a display device by consumers or certification institutions is increasing, the development of a technology for matching color and luminance uniformity is continuously required.

Recently, large-sized display devices are installed outdoors and are widely used for advertisements. Accordingly, there is a demand for technology development of a correction technology that matches the uniformity of color and luminance for a large-sized display device. In addition, when a large-sized display device is installed in a special space where it is difficult for operators to perform calibration, for example, on the upper outer wall of a high-rise building, or when multiple calibrations are required, technology for enabling calibration more safely development is required.

A technology for correcting luminance and color deviation for a conventional display device acquires color and luminance information for each pixel of an image displayed on a screen of a display device through a camera, and corrects data such that a reference color value and a reference luminance value are output. After creating it, it can be stored in memory (eg, flash memory, etc.).

In general, since the resolution of a camera is not much higher than that of a display device, when capturing an image of a screen displayed on a display device with a camera, a moiré pattern may occur in the captured image. In order to prevent this, in general, an image displayed on a display device may be divided and photographed by a camera.

When a display device is divided and photographed using a camera to generate image correction data, color and/or brightness deviation of the corrected image may occur because the photographing time point is different for each screen area or pixel.

In addition, in general, display devices have different output characteristics when all pixels are turned on and when they are partially turned on, so a factor that deteriorates the correction effect exists in a normal viewing environment. FIG. 12 is a diagram showing the change in image quality over time after the LED display device is turned on. FIG. 12 (a) is when the LED display device is turned on (when 0 minutes have elapsed after turning on), FIG. 12 (b) is the LED display When 10 minutes have elapsed after turning on the device, (c) of FIG. 12 shows an image when 40 minutes have elapsed after turning on the LED display device. When the display device is turned on, the color temperature may be 4905K, the color temperature may be 5462K when 10 minutes have elapsed after the LED device is turned on, and the color temperature may be 5718K when 40 minutes have elapsed after the LED device is turned on. Referring to FIG. 12 , when the temperature of the LED increases, the amount of light decreases and the color temperature increases, and luminance and color deviation may increase in the display device.

On the other hand, in general, the correction distance for correcting the luminance and color deviation of the display device is set to a distance similar to the viewing distance, and is 1.5 times or more than the height or diagonal distance of the display device.

Accordingly, when a worker corrects color and/or luminance of a large-sized display device or replaces a module of a display device, the height and distance for capturing an image displayed on the display device increases, resulting in a safety accident. The danger is increasing.

For example, in the case of replacing a defective module in a display device, for a defective module in a high position, one worker climbs up the ladder with one module, replaces one defective module, comes down, and moves the ladder again. It takes a lot of time to repeat the replacement of defective modules, and the higher the location where the display device is installed, the lower the work speed and the higher the risk of accidents due to workers falling during replacement work. The fall of the work area also increases the possibility of accidents to bystanders near the work area.

In addition, when the outdoor display device is installed at various angles and heights as shown in (a) and (b) of FIG. 13, the color and/or luminance of the display device may be changed by an operator using a vehicle or a ladder due to vehicles and people on the road. It may be difficult to calibrate or replace the module of the display device.

Various embodiments of the present disclosure may provide an apparatus and method for correcting a screen of an external display device capable of applying an improved correction technology to the display device. For example, a correction algorithm for correcting luminance and color deviations of a display device according to user environment conditions may be improved. As another example, a remote or unmanned operation system for preventing safety accidents may be introduced during a correction operation for correcting deviations in brightness and color of the display device and a replacement operation for a defective module of the display device.

An apparatus for calibrating a screen of an external display device according to various embodiments of the present disclosure, comprising: a camera and a communication module communicatively connected to the external display device; First correction data for correcting the screen is generated using first image data for each pixel of each of the divided images of the first image displayed on the external display device obtained by using the camera, and the first correction data Provided to the display device, a second correction for correcting the screen using second image data for each pixel of a second image corresponding to the first correction data displayed on the display device obtained using the camera It may include a processor configured to generate data.

In the method for calibrating a screen of an external display device according to various embodiments, correcting the screen using first image data for each pixel of divided images of a first image displayed on the external display device acquired using a camera An operation of generating first correction data for a second image corresponding to the first correction data displayed on the display device obtained by using the camera; and providing the first correction data to the display device. An operation of generating second correction data for correcting the screen using second image data for each pixel may be included.

An apparatus and method for calibrating a screen of an external display device according to various embodiments may improve uniformity of brightness and color compared to conventional calibrating techniques of a display device.

An apparatus and method for calibrating a screen of an external display device according to various embodiments may enable efficient and safe operation by using a robot device during maintenance work of the display device.

1 is a diagram illustrating a calibration system of a display device according to various embodiments.
2 is a block diagram of an electronic device according to various embodiments.
3 is a block diagram of a display device according to various embodiments.
4 is a diagram for explaining an LED display panel according to various embodiments.
5 is a flowchart of a calibration operation of a display device according to various embodiments.
6 is a flowchart of a calibration operation of a display device according to various embodiments of the present disclosure.
7 is a diagram for explaining a correction operation of a display device using a robot device according to various embodiments.
8 is a configuration diagram of a robot device according to various embodiments.
9 is a flowchart of a display correction operation using a robot device according to various embodiments of the present disclosure.
10 is a diagram illustrating improved luminance characteristics according to calibration of a display device according to various embodiments.
11 is a flowchart of a module replacement operation of a display device of an electronic device according to various embodiments of the present disclosure.
12 is a diagram illustrating a change in image quality over time after lighting of a conventional LED display device.
13 is a view showing a conventional display device installed outdoors.

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings. Examples and terms used therein are not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiments. In connection with the description of the drawings, like reference numerals may be used for like elements. Singular expressions may include plural expressions unless the context clearly dictates otherwise. In this document, expressions such as "A or B" or "at least one of A and/or B" may include all possible combinations of the items listed together. Expressions such as "first," "second," "first," or "second," may modify the corresponding components regardless of order or importance, and are used to distinguish one component from another. It is used only and does not limit the corresponding components. When a (e.g., first) element is referred to as being "(functionally or communicatively) coupled to" or "connected to" another (e.g., second) element, that element refers to the other (e.g., second) element. It may be directly connected to the component or connected through another component (eg, a third component).

In this document, "configured (or configured to)" means "suitable for," "having the ability to," "changed to," depending on the situation, for example, hardware or software. ,” “made to,” “capable of,” or or “designed to” can be used interchangeably. In some contexts, the expression "device configured to" can mean that the device is "capable of" in conjunction with other devices or components. For example, the phrase "a processor configured (or configured) to perform A, B, and C" may include a dedicated processor (eg, embedded processor) to perform the operation, or by executing one or more software programs stored in a memory device. , may mean a general-purpose processor (eg, CPU or application processor) capable of performing corresponding operations.

Electronic devices according to various embodiments of the present document, for example, smart phones, tablet PCs, mobile phones, video phones, e-book readers, desktop PCs, laptop PCs, netbook computers, workstations, servers, PDAs, PMPs ( portable multimedia player), an MP3 player, a medical device, a camera, or a wearable device. A wearable device may be in the form of an accessory (e.g. watch, ring, bracelet, anklet, necklace, eyeglasses, contact lens, or head-mounted-device (HMD)), integrated into textiles or clothing (e.g. electronic garment); In some embodiments, the electronic device may include, for example, a television, a digital video disk (DVD) player, or an audio device. , refrigerators, air conditioners, vacuum cleaners, ovens, microwave ovens, washing machines, air purifiers, set top boxes, home automation control panels, security control panels, media boxes (e.g. Samsung HomeSync ^TM , Apple TV ^TM , or Google TV ^TM ), It may include at least one of a game console (eg, Xbox ^TM , PlayStation ^TM ), an electronic dictionary, an electronic key, a camcorder, or an electronic photo frame.

In another embodiment, the electronic device may include various types of medical devices (e.g., various portable medical measuring devices (blood glucose meter, heart rate monitor, blood pressure monitor, body temperature monitor, etc.), magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), CT (computed tomography), imager, or ultrasonicator, etc.), navigation device, global navigation satellite system (GNSS), EDR (event data recorder), FDR (flight data recorder), automobile infotainment device, marine electronic equipment (e.g. navigation devices for ships, gyrocompasses, etc.), avionics, security devices, head units for vehicles, industrial or home robots, drones, ATMs in financial institutions, point of sale (POS) in stores of sales), or IoT devices (eg, light bulbs, various sensors, sprinkler devices, fire alarms, thermostats, street lights, toasters, exercise equipment, hot water tanks, heaters, boilers, etc.). According to some embodiments, the electronic device may be furniture, a part of a building/structure or a vehicle, an electronic board, an electronic signature receiving device, a projector, or various measuring devices (eg, water, electricity, gas, radio wave measuring device, etc.). In various embodiments, the electronic device may be flexible or may be a combination of two or more of the various devices described above. An electronic device according to an embodiment of this document is not limited to the aforementioned devices. In this document, the term user may refer to a person using an electronic device or a device using an electronic device (eg, an artificial intelligence electronic device).

1 is a diagram illustrating a calibration system of a display device according to various embodiments.

1, the calibration system 101 may include an electronic device 110, a camera 120, and a display device 130. Additionally, the calibration system 101 may further include a communication board 140. may be

The electronic device 110 may be the electronic device 201 of FIG. 2 . Referring to FIG. 2 , an electronic device 201 may include a bus 210, a processor 220, a memory 230, an input/output interface 250, a display 260, and a communication interface 270. In some embodiments, the electronic device 201 may omit at least one of the components or may additionally include other components.

Bus 210 may include circuitry that connects components 210 - 270 to each other and communicates (eg, control messages or data) between components.

The processor 220 may include one or more of a central processing unit, an application processor, or a communication processor (CP). The processor 220 may, for example, execute calculations or data processing related to control and/or communication of at least one other component of the electronic device 201 .

Memory 230 may include volatile and/or non-volatile memory. The memory 230 may store, for example, commands or data related to at least one other component of the electronic device 201 . According to one embodiment, the memory 230 may store software and/or programs 240 . The program 240 may include, for example, a kernel 241, middleware 243, an application programming interface (API) 245, and/or an application program (or “application”) 247, and the like. . At least part of the kernel 241, middleware 243, or API 245 may be referred to as an operating system. Kernel 241, for example, provides system resources (eg, middleware 243, API 245, or application program 247) used to execute operations or functions implemented in other programs (eg, middleware 243, API 245, or application program 247). : The bus 210, the processor 220, or the memory 230, etc.) can be controlled or managed. In addition, the kernel 241 may provide an interface capable of controlling or managing system resources by accessing individual components of the electronic device 201 from the middleware 243, API 245, or application program 247. can

The middleware 243 may perform an intermediary role so that, for example, the API 245 or the application program 247 communicates with the kernel 241 to exchange data. Also, the middleware 243 may process one or more job requests received from the application program 247 according to priority. For example, the middleware 243 may use system resources (eg, the bus 210, the processor 220, or the memory 230, etc.) of the electronic device 201 for at least one of the application programs 247. Prioritize and process the one or more work requests. The API 245 is an interface for the application 247 to control functions provided by the kernel 241 or the middleware 243, for example, at least for file control, window control, image processing, or character control. It can contain one interface or function (eg command). The input/output interface 250 transmits, for example, commands or data input from a user or other external device to other element(s) of the electronic device 201, or other elements of the electronic device 201 ( s) may output commands or data received from the user or other external devices.

The display 260 may be, for example, a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, a microelectromechanical systems (MEMS) display, or an electronic paper display. can include The display 260 may display various contents (eg, text, image, video, icon, and/or symbol) to the user. The display 260 may include a touch screen, and may receive, for example, a touch, gesture, proximity, or hovering input using an electronic pen or a part of the user's body.

The communication interface 270 establishes communication between the electronic device 201 and an external device (eg, the first external electronic device 202 , the second external electronic device 204 , or the server 206 ). can For example, the communication interface 270 may be connected to the network 262 through wireless or wired communication to communicate with an external device (eg, the second external electronic device 204 or the server 206).

Wireless communication is, for example, LTE, LTE-A (LTE Advance), CDMA (code division multiple access), WCDMA (wideband CDMA), UMTS (universal mobile telecommunications system), WiBro (Wireless Broadband), or GSM (Global System for Mobile Communications) may include cellular communication using at least one of the like. According to one embodiment, wireless communication, for example, WiFi (wireless fidelity), Bluetooth, Bluetooth Low Energy (BLE), Zigbee (Zigbee), NFC (near field communication), magnetic secure transmission (Magnetic Secure Transmission), radio It may include at least one of a frequency (RF) and a body area network (BAN). According to one embodiment, wireless communication may include GNSS. The GNSS may be, for example, a Global Positioning System (GPS), a Global Navigation Satellite System (Glonass), a Beidou Navigation Satellite System (hereinafter “Beidou”) or Galileo, the European global satellite-based navigation system. Hereinafter, in this document, "GPS" may be used interchangeably with "GNSS". Wired communication may include, for example, at least one of universal serial bus (USB), high definition multimedia interface (HDMI), recommended standard 232 (RS-232), power line communication, or plain old telephone service (POTS). there is. Network 262 may include at least one of a telecommunications network, for example, a computer network (eg, LAN or WAN), the Internet, or a telephone network.

Each of the first and second external electronic devices 202 and 204 may be the same as or different from the electronic device 201 . According to various embodiments, all or part of operations executed in the electronic device 201 may be executed in one or more electronic devices (eg, the electronic devices 202 and 204 or the server 206). According to this, when the electronic device 201 needs to perform a certain function or service automatically or upon request, the electronic device 201 instead of or in addition to executing the function or service itself, at least some functions related thereto may request another device (eg, the electronic device 202 or 204 or the server 206). The additional function may be executed and the result may be delivered to the electronic device 201. The electronic device 201 may provide the requested function or service by processing the received result as it is or additionally. For example, cloud computing, distributed computing, or client-server computing technologies may be used.

The camera 120 is, for example, a device capable of capturing still images and moving images, and according to one embodiment, one or more image sensors (eg, a front sensor or a rear sensor), a lens, an image signal processor (ISP), or May contain a flash (e.g. LED or xenon lamp).

The display device 130 may include, for example, a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, or a microelectromechanical system (MEMS) display. The display device 130 may display, for example, various types of content (eg, text, image, video, icon, and/or symbol). The display device 130 may be manufactured to have various resolutions such as FHD (Full-HD) and UHD (Ultra-HD), and may be manufactured in various sizes for indoor or outdoor use.

The display device 130 may be the display device 301 of FIG. 3 . Referring to FIG. 3 , a display device 301 may include a processor 310, a memory 330, an input/output interface 350, a display panel 370, and a communication interface 390.

The processor 310 may, for example, execute calculations or data processing related to control and/or communication of at least one other component of the display device 301 . The processor 310 may be implemented as, for example, a system on chip (SoC). According to one embodiment, the processor 310 may further include a graphic processing unit (GPU) and/or an image signal processor. The processor 310 may load and process a command or data received from at least one of other components (eg, a non-volatile memory) into a volatile memory, and store resultant data in the non-volatile memory.

Memory 330 may include volatile and/or non-volatile memory. The memory 330 may store, for example, commands or data related to at least one other component of the display device 301 .

The input/output interface 350 transmits, for example, commands or data input from a user or other external device to other component(s) of the display device 301 or other component(s) of the display device 301. ) can output commands or data received from the user or other external devices.

The display panel 370 may be, for example, a light emitting diode (LED) display panel. Referring to FIG. 4 , the LED display panel 401 may include a plurality of display modules 420 each including a designated number of LEDs 410 . As another example, the display panel 370 may be a liquid crystal display (LCD) panel or an organic light emitting diode (OLED) display panel.

The communication interface 390 may establish communication between the display device 301 and external devices (eg, the electronic device 110 , the communication board 140 , and the camera 120 ). For example, the communication interface 370 may communicate with an external device by being connected to a network (not shown) through wireless or wired communication.

The communication board 140 may be a board for communication between the electronic device 110 and the display device 130 . Referring to FIG. 1 , the communication board 140 may or may not be included in the calibration system 101 according to the communication method of the electronic device 110 and the display device 130 . The communication board 140 may enable communication between the electronic device 110 and the display device 130 when communication methods between the electronic device 110 and the display device 130 are different, and the correction system 101 can be included For example, when an SPI communication method or an I2C communication method is applied to the display device 130, but a communication method different from that of the display device 130 is applied to the electronic device 110, the communication board 140 uses the electronic device 110 ) and the display device 130 can be communicated. As another example, if the communication method between the electronic device 110 and the display device 130 is the same, the communication board 140 may not be included in the calibration system 101 .

For example, the communication board 140 may be an independent device as shown in FIG. 1 and, although not shown, the communication board 140 may include a communication interface. As another example, the communication board 140 may be attached to the electronic device 110 or the display device 130 .

According to various embodiments, an apparatus for calibrating a screen of an external display device may include: a camera and a communication module communicatively connected to the external display device; First correction data for correcting the screen is generated using first image data for each pixel of each of the divided images of the first image displayed on the external display device obtained by using the camera, and the first correction data Provided to the display device, a second correction for correcting the screen using second image data for each pixel of a second image corresponding to the first correction data displayed on the display device obtained using the camera It may include a processor configured to generate data.

According to various embodiments, the processor may further include generating final correction data using the first correction data and the second correction data.

According to various embodiments, the first image data for each pixel may include a first luminance value for each pixel, and the second image data for each pixel may include a second luminance value for each pixel.

According to various embodiments, the processor may use the ratio of the reference luminance value for each pixel to the first luminance value for each pixel to correct the deviation between the reference luminance value and the first luminance value. The second correction data for generating difference correction data and correcting a deviation between the reference luminance value and the second luminance value by using a ratio of the reference luminance value per pixel to the second luminance value per pixel. may include generating

According to various embodiments, the first image data for each pixel may include a first color coordinate value for each pixel, and the second image data for each pixel may include a second color coordinate value for each pixel.

According to various embodiments of the present disclosure, the processor may be configured to correct a deviation between the reference color coordinate value and the first color coordinate value by using a ratio of the reference color coordinate value for each pixel to the first color coordinate value for each pixel. generating the primary correction data, and correcting a deviation between the reference color coordinate value and the second color coordinate value by using a ratio of the reference color coordinate value for each pixel to the second color coordinate value for each pixel; It may include generating primary correction data.

According to various embodiments, an image of white color or an image of R, G, and B colors may be displayed on at least a portion of the screen of the display device.

According to various embodiments, the processor may use the white color image or the R, G, and B color image for each of the R, G, and B colors of the screen of the display device to determine the first image for each pixel. data, and second image data for each pixel of the R, G, and B colors of the screen of the display device may be obtained using the white color image or the R, G, and B color image. there is.

According to various embodiments, the camera may be included in a robot device.

According to various embodiments, when a pattern image output to the display device is obtained using the camera, a point at which the screen of the display device is captured may be set by the robot device using the pattern image.

According to various embodiments, the display device is composed of a plurality of display modules, and a defective display module among the plurality of display modules may be replaced with a normal display module by a robot device.

According to various embodiments, the robot device includes a camera, the position of the defective display module is detected by the camera included in the robot device, and the replaced normal display module is detected by the camera included in the robot device. An operating state of the display module may be confirmed.

5 is a flowchart of a calibration operation of a display device according to various embodiments. Referring to FIG. 5 , the electronic device 51 may obtain first image data for each pixel of the display device 53 and calculate first correction data for each pixel based on this. After reflecting the primary correction data for each pixel on the display device 53, an additional correction operation for the display device 53 is performed according to the operations of the electronic device 51, the camera 52, and the display device 53. can be performed The additional correction operation is performed after the display device 53 outputs an image calibrated for each pixel of a constant luminance (or brightness) and/or color and after aging for a specified time (eg, at least 5 minutes or more), the camera 52 ) may proceed through an operation of capturing the entire screen of the display device 53. In the entire screen of the display device 53 where the electronic device 51 is photographed, the change in luminance and/or color of each pixel may be obtained to calculate secondary correction data for each pixel, and the primary correction data may be previously reflected. The display device 53 may additionally reflect secondary correction data.

In operation 505, the display device 53 may output an image.

According to an embodiment, the display device 53 may output R (red), G (green), and B (blue) color images, respectively. Alternatively, the display device 53 may output a white (W) color image.

According to an embodiment, when the display device 53 is an LED display device, all of the LED elements may be simultaneously turned on to output an entire image. Alternatively, the display device 53 may divide and turn on the LED elements to output a plurality of divided images (also referred to as pattern images), respectively.

In operation 510, the camera 52 may obtain divided images by capturing an image displayed on the screen of the display device 53.

According to an embodiment, in order to prevent a moiré pattern from occurring in a captured image, when the display device 53 outputs an image on the entire screen, the camera 52 captures the image displayed on the screen of the display device 53. You can split and take multiple shots.

For example, when the display device 53 outputs images of R, G, and B colors on a full screen, the camera 52 displays the entire screen of the display device 53 on which the images of R, G, and B colors are respectively displayed. can be divided and taken. Accordingly, the camera 52 may obtain divided images for each of the R, G, and B images.

As another example, if the display device 53 outputs a W color image on the entire screen, the camera 52 may divide and capture the entire screen of the display device 53 displaying the W color image. In addition, the camera 52 may extract images of R, G, and B colors from each of the divided images of W color by using a color filter of the camera 52 .

According to another embodiment, in order to prevent a moiré pattern from occurring in a captured image, the display device 53 may divide the entire screen of the display device 53 and output the divided screen several times, and accordingly, the camera 52 may capture each of the divided screens of the display device 53.

For example, the display device 53 may output pattern images, respectively. Each of the pattern images is images in which pixels are output at intervals of at least two or more pixels, and each image may output different pixels. In addition, each of the pattern images may be a pre-designated image such as a dotted or linear pattern image in a checkerboard form so that pixel positions of the display device 53 can be distinguished.

For example, the display device 53 may output predetermined pattern images for each of R, G, and B color images, and the camera 52 may output pattern images displayed on the screen of the display device 53. Each of them can be photographed. Accordingly, the camera 52 may obtain divided images for each of the R, G, and B images.

As another example, the display device 53 may output predetermined pattern images for W color images, and the camera 52 may capture each of the pattern images displayed on the screen of the display device 53. . Accordingly, the camera 52 may obtain segmented images for color W. In addition, the camera 52 may extract images of R, G, and B colors from each of the divided images of W color by using a color filter.

In operation 515, the electronic device 51 may receive a photographed image from the camera 52.

In operation 520, the electronic device 51 may obtain first image data for each pixel of the screen of the display device 53 using the photographed image.

For example, the first image data may be luminance and/or color information (value) of an image output by the display device 53 . As another example, the first image data may be color coordinates obtained by digitizing brightness (luminance) and saturation of an image output by the display device 53 . For example, the electronic device 51 may create and store a table of values of the first image data for each pixel for each R, G, and B color.

According to an embodiment, for split images obtained by dividing and photographing the entire screen of the display device 53, the electronic device 51 determines the split images and the resolution of the display device 53 corresponding to each of the split images. First image data for each pixel of the screen of the display device 53 may be obtained using information and/or resolution information of the camera 52 . For example, the electronic device 51 determines the position of each pixel of the screen of the display device 53 based on the ratio of the resolution of the display device 53 and the resolution of the camera 52 corresponding to each of the divided images. By determining, first image data for each pixel of the screen of the display device 53 may be obtained. Resolution information of the display device 53 and resolution information of the camera 52 corresponding to each of the divided images may be received from the camera 52, input by a user, or previously stored in the electronic device 51. It can be.

According to another embodiment, the display device 53 outputs a plurality of pattern images, and the electronic device 51 uses the pattern images for divided images obtained by photographing the pattern images respectively by the camera 52. Thus, first image data for each pixel of the screen of the display device 53 may be acquired. The pattern image may be a dotted image with at least two or more pixel intervals or a linear pattern image, which is designated in advance so that the location of each pixel of the display device 53 can be distinguished. For example, the pattern image may have a checkerboard shape.

In operation 525, the electronic device 51 may generate first correction data for each pixel using the first image data for each pixel.

For example, the electronic device 51 performs a first step for correcting a deviation between the reference image data and the first image data by using a conventional image data correction technology (eg, luminance and/or color correction technology). Calibration data can be generated. The electronic device 51 may generate primary correction data for each pixel using a conventional interpolation method.

When the first image data for each pixel is a first luminance value, the primary correction data for each pixel is the interval between the first luminance value and the reference luminance value of the color value (eg, R, G, or B color value) for each pixel. It may be data for correcting the deviation. The electronic device 51 may generate first correction data for each pixel for correcting the luminance value for each pixel using a ratio of the reference luminance value to the first luminance value for each pixel.

Alternatively, when the first image data for each pixel is first color coordinates obtained by digitizing lightness (luminance) and saturation, the primary correction data for each pixel is the first color coordinate between the reference color coordinates of the color value for each pixel. It may be data for correcting the deviation. The electronic device 51 converts the first color coordinates and the reference color coordinates into an RGB or XYZ color coordinate system, converts the value obtained by converting the reference color coordinates into an RGB or XYZ color coordinate system, and converts the first color coordinates into an RGB or XYZ color coordinate system First correction data for each pixel for correcting color coordinates for each pixel may be generated using a ratio between values. In the case of correction using only primary colors, primary correction data for each pixel may be calculated as described above, but color coordinates may be converted using a 3 by 3 matrix for more accurate color coordinate conversion.

In operation 530, the electronic device 51 may transmit primary correction data for each pixel to the display device 53.

In operation 535, the display device 53 may output an image in which the primary correction data for each pixel is reflected.

For example, the display device 53 may output R (red), G (green), and B (blue) color images to which primary correction data for each pixel is applied. As another example, the display device 53 may output a W (white) color image to which primary correction data for each pixel is applied.

According to the above-described operations 510 to 535, the image to which the primary correction data for each pixel is reflected has a problem in that the brightness and/or color uniformity of each pixel is lowered according to the characteristics of the display device 53 and the camera 52 described later. there is.

For example, in the display device 53, the temperature of the light source element changes according to time, and as a result, the brightness of each light source element may be changed. In addition, when the LED element is applied to the display device 53, the temperature rises when the on state of the LED element is maintained, thereby reducing the amount of light. In addition, when some light source elements of the display device 53 or all light source elements of the display device 53 are turned on, the temperature distribution of the display device 53 is different, so that the brightness varies according to the position of the light source elements. this happens In addition to the above-described characteristics of the display device 53 for each time and/or lighting method, the sensitivity of the camera 52 has a characteristic that varies according to time.

According to the characteristics of the display device 53 and the camera 52 described above, in order to achieve optimal image quality of the display device 53 by solving the problem of deterioration in the uniformity of brightness and/or color of each pixel, the 540 to 540 to Through operation 560, an additional operation of generating secondary correction data for each pixel may be executed.

In operation 540, the display device 53 may perform screen aging. According to an embodiment, the display device 53 may maintain the image output to which the primary correction data for each pixel is reflected for a specified period of time. For example, after outputting the R color video, the R color video output can be maintained for a specified period of time, and the G color video output can be maintained for a specified period of time after the G color video output, and also the B color video output can be maintained. After outputting, the output of color B can be maintained for a specified period of time. As another example, after outputting a W color image, the W color output may be maintained for a specified time.

In operation 545, the camera 52 may acquire an image of the entire screen of the display device 53 by capturing an image displayed on the screen of the display device 53.

For example, when a designated time elapses after the display device 53 outputs each of the R, G, and B color images in full screen, the camera 52 captures the R, G, and B color images, respectively. Images of R, G, and B colors can be obtained.

As another example, when a specified time elapses after the display device 53 outputs the W color image on the entire screen, the camera 52 may acquire the W color image by capturing the W color image. In addition, the camera 52 may extract R, G, and B color images from the W color image using the color filter of the camera 52 .

According to an embodiment, in order to prevent the moiré pattern from occurring, the camera 52 may obtain an image displayed on the screen of the display device 53 through defocus photography. In this case, the display device 53 may output a predetermined pattern image to enable accurate positioning of each pixel of the display device 53 after or before outputting an image in which the primary correction data for each pixel is reflected. , The camera 52 may capture and obtain the pattern image. The pattern image may have a different spacing between pixels of the display device 53 or may be perpendicular and /or When various distortion phenomena are mixed, such as a horizontal misalignment or a lens distortion of the camera 52, the distorted image is obtained by connecting the pixel positions of the display device 53 and the pixel positions of the captured image. It may be a preset image to be used for correction. The pattern image is an image having at least two or more pixel intervals, and may be a dotted or linear pattern image in a checkerboard form.

According to another embodiment, according to specifications of the camera 52, an image displayed on the screen of the display device 53 without generating a moiré pattern may be acquired even when the camera 52 performs focus photography.

In operation 550, the electronic device 51 may receive a photographed image from the camera 52.

In operation 555, the electronic device 51 may obtain second image data for each pixel of the screen of the display device 53 using the photographed image.

For example, the second image data may be luminance and/or color information (value) of an image output by the display device 53 . As another example, the second image data may be color coordinates obtained by digitizing brightness (luminance) and saturation of the image output by the display device 53 . For example, the electronic device 51 may generate and store a table of values of the second image data for each pixel for each R, G, and B color.

According to an embodiment, when the camera 52 obtains an image displayed on the screen of the display device 53 through defocus photography and transmits the obtained pattern image to the electronic device 51, the electronic device ( 51) may obtain second image data for each pixel of the screen of the display device 53 using the defocused image and the pattern image. For example, the electronic device 51 performs distortion correction of an image acquired according to defocus shooting using the pattern image and a connection between the position of each pixel of the display device 53 and the position of each pixel of the defocus photographed image. It is possible to distinguish pixels of a defocused image by doing. Also, the second image data may be an average value of second image data values of adjacent pixels according to defocus photography.

According to another embodiment, when the camera 52 transmits a focused image captured by the electronic device 51, the electronic device 51 transmits the photographed image, resolution information of the display device 53, and/or the camera 52 ), second image data for each pixel of the screen of the display device 53 may be obtained.

In operation 560, the electronic device 51 may generate secondary correction data for each pixel using the second image data for each pixel.

For example, the electronic device 51 uses a conventional technique for correcting image data (eg, luminance and/or color correction technology) to perform a secondary process for correcting a deviation between the reference image data and the second image data. Calibration data can be generated. The electronic device 51 may generate secondary correction data for each pixel using a conventional interpolation method.

When the second image data for each pixel is the second luminance value, the secondary correction data for each pixel is the interval between the second luminance value and the reference luminance value of the color value (eg, R, G, or B color value) for each pixel. It may be data for correcting the deviation. The electronic device 51 may generate secondary correction data for each pixel for correcting the luminance value for each pixel using a ratio of the reference luminance value to the second luminance value for each pixel.

Alternatively, when the second image data for each pixel is second color coordinates obtained by digitizing lightness (luminance) and saturation, the secondary correction data for each pixel is the difference between the first color coordinates and the reference color coordinates of the color value for each pixel. It may be data for correcting the deviation. The electronic device 51 converts the second color coordinates and the reference color coordinates into an RGB or XYZ color coordinate system, converts the value obtained by converting the reference color coordinates into an RGB or XYZ color coordinate system, and converts the second color coordinates into an RGB or XYZ color coordinate system Secondary correction data for each pixel for correcting color coordinates for each pixel may be generated using a ratio between values. In the case of correction using only primary colors, secondary correction data for each pixel may be calculated as described above, but color coordinates may be converted using a 3 by 3 matrix for more accurate color coordinate conversion.

According to the above-described embodiment, when the entire image of the screen of the display device 53 is captured by artificially defocusing the focus of the lens of the camera 52 according to the moiré pattern generation problem, the second image data for each pixel is captured. may be an average value of second image data of neighboring pixels. Accordingly, when only the secondary correction data is applied to the display device, although overall brightness and/or color distribution may be uniform, brightness and/or color deviation may occur in a small area. Accordingly, stains due to differences in brightness between pixels may be identified on the display device 53 .

To compensate for this, operation 565 may be executed.

In operation 565, the electronic device 51 may generate final correction data by multiplying and calculating the first and second correction data for each pixel. Through operation 565, primary correction data, which is individual data for each pixel that does not include brightness and/or color information of neighboring pixels for each pixel from the partial image, and brightness and/or color information of neighboring pixels for each pixel from the entire image are included. Correction of brightness and/or color deviation of the small area when all pixels of the display device 53 are turned on, and brightness and/or color deviation of the entire area of the display device 53 using all of the secondary correction data obtained can improve

According to an embodiment, shooting conditions such as a distance between the camera 52 and the display device 53, a shooting angle of the camera 52, a shooting speed, and an aperture value may be adjusted by a person.

According to an embodiment, the aforementioned camera 52 and/or display device 53 may perform the aforementioned operations respectively under the control of the electronic device 51 . According to another embodiment, the above-described display device 53 may execute an image output operation according to a signal received from a remote controller. According to another embodiment, capturing an image of the camera 52 may be performed by human manipulation.

The image output of operation 505 of the above-described embodiment may be performed in various ways, such as outputting an image stored in the display device 53, outputting an image received from the electronic device 51, or outputting an image stored in a storage medium such as USB. It can work.

According to the above-described embodiment, the camera 52 and the electronic device 51 have been described as independent devices, but according to another embodiment, the camera 52 is included in the electronic device 51 and operates. may be

Meanwhile, according to another embodiment, after the display device 53 outputs an image in which the primary correction data for each pixel is reflected for a specified time, the second image data for each pixel of the image captured by the camera 52 approximates the reference image data. Operations of adjusting the brightness values (luminance values or color coordinate values) of each pixel of the display device 53 and photographing the screen of the display device 53 may be repeated until it is done.

6 is a flowchart of a calibration operation of a display device according to various embodiments of the present disclosure. Referring to FIG. 6 , the display device 63 may perform the operation of the electronic device 51 of FIG. 5 for generating first and second correction data and final correction data for each pixel.

In operation 605, the display device 63 may output an image.

In operation 610, the camera 62 may obtain divided images by capturing an image displayed on the screen of the display device 63.

Operations 605 and 610 correspond to operations 505 and 510 of FIG. 5 , and detailed descriptions thereof are omitted.

In operation 615, the display device 63 may receive a photographed image from the camera 62.

In operation 620, the display device 63 may obtain first image data for each pixel of the screen of the display device 63 using the photographed image.

In operation 625, the display device 63 may generate first correction data for each pixel using the first image data for each pixel.

Operations 620 and 625 are different from operations 520 and 525 of FIG. 5 only in the subject of the operation, and detailed operations correspond to operations 520 and 525 of FIG. 5 , and detailed descriptions thereof are omitted.

In operation 630, the display device 63 may output a second image to which the first correction data is reflected.

In operation 635, the display device 63 may perform screen aging.

In operation 640, the camera 62 may obtain an image of the entire screen of the display device 63 by capturing an image displayed on the screen of the display device 63.

Operations 630 , 635 , and 640 correspond to operations 535 , 540 , and 545 of FIG. 5 , and detailed descriptions thereof are omitted.

In operation 645, the display device 63 may receive a photographed image from the camera 62.

In operation 650, the display device 63 may obtain second image data for each pixel of the screen of the display device 63 using the photographed image.

In operation 655, the display device 63 may generate secondary correction data for each pixel using the second image data for each pixel.

In operation 660, the display device 63 may generate final correction data by multiplying and calculating the first and second correction data for each pixel.

Operations 650, 655, and 660 are operations corresponding to operations 555, 560, and 565 of FIG. 5 and operations 555, 560, and 565 in FIG. omit

7 is a diagram for explaining a correction operation of a display device using a robot device according to various embodiments, and FIG. 8 is a configuration diagram of a robot device according to various embodiments.

Referring to FIG. 7 , when the display device 73 is located on top of a high-rise building, a drone 74 equipped with a camera 75 or a robot equipped with a camera 77 is used to calibrate the display device 73. The screen of the display device 73 can be photographed using a robot device such as (76). For example, the robot device may be an unmanned aerial vehicle or a general robot capable of flying, such as a drone, and although not shown in FIG. 7, the robot device may be various types of robots, such as a robot having at least two articulated joints.

Referring to FIG. 8 , a robot device 801 may include a processor 810, a camera 820, a memory 830, and a communication interface 840.

The processor 810 may include one or more of a central processing unit, an application processor, or a communication processor (CP). The processor 810 may execute calculations or data processing related to control and/or communication of at least one other component of the robot device 801, for example.

The camera 820 may take, for example, still images and moving images, and according to one embodiment, one or more image sensors (eg, a front sensor or a rear sensor), a lens, an image signal processor (ISP), or a flash ( eg LED or xenon lamp).

Memory 830 may include volatile and/or non-volatile memory. The memory 830 may store, for example, commands or data related to at least one other component of the robotic device 801 . According to one embodiment, the memory 830 may store software and/or programs.

The communication interface 840 may establish communication between the robot device 801 and an external device, for example. For example, the communication interface 840 may communicate with an external device by being connected to a network through wireless or wired communication.

On the other hand, in FIG. 8, the illustration of the multi-joint arm and/or leg of the robot device 801 and the mechanical driving unit for driving the propeller in the case of a drone is omitted.

9 is a flowchart of a display correction operation using a robot device according to various embodiments of the present disclosure.

In operation 905, the display device 93 may output a pattern image. For example, the pattern image may be a preset image to be used for adjusting the position of the robot device 94 including a camera.

In operation 910, the robot device 94 may adjust its position using the pattern image.

In operation 915, the display device 93 may output an image in which primary correction data for each pixel is previously reflected and stored.

The image in which the first correction data of operation 915 is reflected and stored may be an image in which the first correction data for each pixel of FIG. 5 is reflected or an image in which the first correction data for each pixel in FIG. 6 is reflected.

In operation 920, the display device 93 may perform screen aging.

In operation 925, the robot device 94 may acquire an image of the entire screen of the display device 93 by capturing an image displayed on the screen of the display device 93.

In operation 930, the electronic device 91 may receive a captured image from the robot device 94.

In operation 935, the electronic device 91 may obtain second image data for each pixel of the screen of the display device 93 using the photographed image.

In operation 940, the electronic device 91 may generate secondary correction data for each pixel using the second image data for each pixel.

In operation 945, the electronic device 91 may generate final correction data by multiplying and calculating the first and second correction data for each pixel.

The above-described operations 920 to 945 are operations corresponding to each other except that the robot device 94 is applied instead of the camera 52 of FIG. 5 compared to the operations 540 to 565 of FIG. 5 , and detailed descriptions thereof are omitted.

In the above-described embodiment, it has been described that the first correction data is reflected in advance and the stored image is output, but an operation of generating and reflecting the first correction data may be performed as shown in FIGS. 5 and 6 .

In the above-described embodiment, it has been described that the robot device 94 adjusts the position of the robot device 94 by using a pattern image, but according to another embodiment, the position of the robot device 94 is directly adjusted by a person or , or the position of the robot device 94 may be adjusted according to the control of the electronic device 91 .

If the display device is calibrated according to the above-described embodiments, the uniformity improvement effect of luminance and color can be obtained as shown in FIG. 10 and Table 1 compared to the conventional display calibration technology.

Referring to FIG. 10, the uniformity of luminance and color of the image of FIG. 10 (b), which is the image displayed on the display device after reflecting the primary correction data for each pixel, compared to (a) of FIG. 10, which is the image displayed on the display device before correction. It can be seen that has improved. In addition, compared to FIG. 10 (b), it can be seen that the uniformity of luminance and color of the image of FIG. 10 (c) displayed on the display device after reflecting the secondary correction data for each pixel after aging is improved.

Table 1 below shows measured values of luminance deviation and color temperature deviation of each display device before correction, after reflection of primary correction data for each pixel, and after reflection of secondary correction data for each pixel after aging. Referring to Table 1, it can be seen that the luminance deviation and color temperature deviation of the display device after reflecting the secondary correction data for each pixel after aging are reduced compared to the luminance deviation and temperature deviation of the display device before correction and after reflecting the primary correction data for each pixel. there is.

division luminance deviation color temperature deviation before correction 3.48% 184K After reflecting the primary correction data for each pixel 2.82% 97K After reflecting secondary correction data for each pixel after aging 2.09% 93K

11 is a flowchart of a module replacement operation of a display device of an electronic device according to various embodiments of the present disclosure. Referring to FIG. 11, when a robot device is used to maintain a display device installed at various heights and angles, it is possible to perform more efficient and safe work than when a person directly maintains the display device using a ladder or the like. there is.

In operation 1105, the robot device 1104 may move to the defective module of the display device 1103. For example, according to the control (remote control) of the electronic device, the position may be moved to the place where the defective module is located, or the robot device 1104 may detect a defect by itself using a camera of the robot device 1104 and then move.

In operation 1110, the display device 1103 may block the video signal of the defective module.

In operation 1115, the robot device 1104 may separate the defective module from which the image signal is blocked from the display device 1103. For example, when the robot device 1104 has at least two articulated arms, a defective module whose image signal is blocked may be spaced apart from the display device 1103 using one of the articulated arms.

In operation 1120, the robot device 1104 may separate the connection cable between the defective module and the display device 1103. For example, when the robot device 1104 has at least two articulated arms, a connection cable between the defective module and the display device 1103 may be separated using one of the articulated arms.

In operation 1125, the robot device 1104 may connect a cable between the normal module and the display device 1103. For example, when the robot device 1104 has at least two articulated arms, a cable between the normal module and the display device 1103 can be connected using one of the articulated arms.

In operation 1130, the robot device 1104 may fix the normal module to the display device 1103. For example, when the robot device 1104 has at least two articulated arms, a normal module may be fixed to the display device 1103 using one of the articulated arms.

In operation 1135, the display device 1103 may output a normal image signal fixed to the display device 1103.

In operation 1140, the robot device 1104 can check the operating state of the normal module fixed to the display device 1103 using a camera.

For example, the robot device 1104 may obtain first image data for each pixel of the screen of the normal module of the display device 1103 using a camera to check the operating state of the normal module. For example, the first image data may be luminance and/or color information (value) of an image output by the display device 1103 . As another example, the first image data may be color coordinates obtained by digitizing brightness (luminance) and saturation of an image output by the display device 1103 .

According to various embodiments, the display device 1103 may be operated by the robot device 1104 or an external electronic device (not shown). Also, the robot device 1104 may operate under the control of an external electronic device.

According to various embodiments, in a method for calibrating a screen of an external display device, the screen is calibrated using first image data for each pixel of divided images of a first image displayed on the external display device acquired using a camera. An operation of generating first correction data for processing, an operation of providing the first correction data to the display device, and a second image corresponding to the first correction data displayed on the display device acquired using the camera. An operation of generating second correction data for correcting the screen using second image data for each pixel of .

According to various embodiments, an operation of generating final correction data using the first correction data and the second correction data may be further included.

According to various embodiments, the first image data for each pixel may include a first luminance value for each pixel, and the second image data for each pixel may include a second luminance value for each pixel.

According to various embodiments of the present disclosure, the generating of the first correction data may include using a ratio of the reference luminance value for each pixel to the first luminance value for each pixel, and the first luminance value for the reference luminance value. The operation of generating the first correction data for correcting the deviation includes generating the second correction data, and the operation of generating the second correction data uses a ratio of the reference luminance value for each pixel to the second luminance value for each pixel, An operation of generating the secondary correction data for correcting a deviation between the reference luminance value and the second luminance value may be included.

According to various embodiments, the camera may be included in a robot device.

According to various embodiments, when a pattern image output to the display device is obtained using the camera, a point at which the screen of the display device is captured may be set by the robot device using the pattern image.

According to various embodiments, the display device may be composed of a plurality of display modules, and a defective display module among the plurality of display modules may be replaced with a normal display module by a robot device.

According to various embodiments, the robot device includes a camera, the position of the defective display module is detected by the camera included in the robot device, and the replaced normal display module is detected by the camera included in the robot device. An operating state of the display module may be confirmed.

The term "module" used in this document includes a unit composed of hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A “module” may be an integrally constructed component or a minimal unit or part thereof that performs one or more functions. A "module" may be implemented mechanically or electronically, for example, a known or future developed application-specific integrated circuit (ASIC) chip, field-programmable gate arrays (FPGAs), or A programmable logic device may be included. At least some of the devices (eg, modules or functions thereof) or methods (eg, operations) according to various embodiments are instructions stored in a computer-readable storage medium (eg, the memory 230) in the form of program modules. can be implemented as When the command is executed by a processor (eg, the processor 220), the processor may perform a function corresponding to the command. Computer-readable recording media include hard disks, floppy disks, magnetic media (e.g. magnetic tape), optical recording media (e.g. CD-ROM, DVD, magneto-optical media (e.g. floptical disks), built-in memory, etc.) A command may include code generated by a compiler or code executable by an interpreter A module or program module according to various embodiments may include at least one or more of the above-described components or , Some of them may be omitted, or other elements may be further included.According to various embodiments, operations performed by modules, program modules, or other elements may be executed sequentially, in parallel, iteratively, or heuristically, or at least Some actions may be performed in a different order, omitted, or other actions may be added.

Claims (20)

In the screen calibration device of the external display device,
A camera included in the robot device and a communication module communicatively connected to the external display device;
First correction data for correcting the screen is generated using first image data for each pixel of each of the divided images of the first image displayed on the external display device obtained by using the camera, and the first correction data Provided to the display device,
A processor configured to generate second correction data for correcting the screen using second image data for each pixel of a second image corresponding to the first correction data displayed on the display device obtained using the camera; include,
When a pattern image output to the display device is obtained using the camera, a screen correction device of an external display device in which a point at which the screen of the display device is to be captured is set using the pattern image by the robot device. The method of claim 1, wherein the processor,
The screen correction device of an external display device further comprising generating final correction data using the first correction data and the second correction data. The method of claim 1 , wherein the first image data for each pixel comprises:
It includes a first luminance value for each pixel,
The second image data for each pixel,
An apparatus for calibrating a screen of an external display device including a second luminance value for each pixel. ◈Claim 4 was abandoned when the registration fee was paid.◈ The method of claim 3, wherein the processor,
generating the first correction data for correcting a deviation between the reference luminance value for each pixel and the first luminance value for each pixel using a ratio of the reference luminance value for each pixel to the first luminance value for each pixel;
generating the second correction data for correcting a deviation between the reference luminance value for each pixel and the second luminance value for each pixel using a ratio of the reference luminance value for each pixel to the second luminance value for each pixel; The screen calibration device of the configured external display device. The method of claim 1 , wherein the first image data for each pixel comprises:
It includes a first color coordinate value for each pixel,
The second image data for each pixel,
An apparatus for calibrating a screen of an external display device including a second color coordinate value for each pixel. ◈Claim 6 was abandoned when the registration fee was paid.◈ The method of claim 5, wherein the processor,
The first correction data for correcting a deviation between the reference color coordinate value for each pixel and the first color coordinate value for each pixel is generated using a ratio of the reference color coordinate value for each pixel to the first color coordinate value for each pixel. and
The second correction data for correcting a deviation between the reference color coordinate value for each pixel and the second color coordinate value for each pixel using a ratio of the reference color coordinate value for each pixel to the second color coordinate value for each pixel A device for calibrating the screen of an external display device configured to generate. The method of claim 1, wherein on at least a portion of the screen of the display device,
A screen calibration device of an external display device for displaying a white color image or displaying images for each R, G, and B color. ◈Claim 8 was abandoned when the registration fee was paid.◈ The method of claim 7, wherein the processor,
Obtaining first image data for each pixel for each of the R, G, and B colors of the screen of the display device using the white color image or the R, G, and B color image;
The external display characterized in that the second image data for each pixel is obtained for each of the R, G, and B colors of the screen of the display device using the white color image or the R, G, and B color image. device's screen calibration device. delete delete The method of claim 1, wherein the display device,
Consists of a plurality of display modules,
A screen calibration device of an external display device in which a defective display module among the plurality of display modules is replaced with a normal display module by the robot device. ◈Claim 12 was abandoned when the registration fee was paid.◈ According to claim 11,
The position of the defective display module is detected by the camera included in the robot device,
A screen calibration device of an external display device in which an operating state of the replaced normal display module is checked by the camera included in the robot device. In the screen calibration method of the external display device,
An operation of generating first correction data for correcting the screen by using first image data for each pixel of each of the divided images of the first image displayed on the external display device obtained by using a camera included in the robot device. class,
providing the first correction data to the display device;
generating second correction data for correcting the screen using second image data for each pixel of a second image corresponding to the first correction data displayed on the display device acquired using the camera; and ,
When a pattern image output to the display device is obtained using the camera, a screen correction method of an external display device in which a point at which the screen of the display device is to be captured is set using the pattern image by the robot device. According to claim 13,
The method of calibrating the screen of an external display device further comprising an operation of generating final correction data using the first correction data and the second correction data. 14. The method of claim 13, wherein the first image data for each pixel comprises:
It includes a first luminance value for each pixel,
The second image data for each pixel,
A screen calibration method of an external display device including a second luminance value for each pixel. ◈Claim 16 was abandoned when the registration fee was paid.◈ The method of claim 15, wherein the generating of the first correction data comprises:
Generating the first correction data for correcting a deviation between the reference luminance value for each pixel and the first luminance value for each pixel by using a ratio of the reference luminance value for each pixel to the first luminance value for each pixel. Including,
The operation of generating the second correction data,
Generating the second correction data for correcting a deviation between the reference luminance value for each pixel and the second luminance value for each pixel using a ratio of the reference luminance value for each pixel to the second luminance value for each pixel A method for calibrating the screen of an external display device including an operation. delete delete The method of claim 13, wherein the display device,
Consists of a plurality of display modules,
A screen correction method of an external display device in which a defective display module among the plurality of display modules is replaced with a normal display module by the robot device. ◈Claim 20 was abandoned when the registration fee was paid.◈ According to claim 19,
The position of the defective display module is detected by the camera included in the robot device,
A screen calibration method of an external display device in which an operating state of the replaced normal display module is checked by the camera included in the robot device.

Images