# US 2023/0274697 A1 · Image display device and system comprising same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0274697 A1 - Document ID: US20230274697A1 - Status: Published application - Kind: A1 - Application number: 18/017,495 - Filed: 2020-07-27 - Published: 2023-08-31 - Earliest claimed: 2020-07-27 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sunbon KOO - Web page: https://patentgrep.com/patent/US20230274697A1 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0257: Reduction of after-image effects - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/048: using evaluation of the usage time - G09G 2320/0626: for control of overall brightness - G09G 2354/00: Aspects of interface with display user - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A system including a plurality of image display apparatuses including at least a first image display apparatus and a second image display apparatus, and a control device controlling the first image display apparatus and the second image display apparatus. The control device controls the first image display apparatus to display a first image, controls the second image display apparatus to display a second image, controls the first image display apparatus to perform an afterimage compensation for pixels included in a first display panel in the first image display apparatus, receives data results of the afterimage compensation for pixels included in the first display panel from the first image display apparatus, and controls the second image display apparatus to perform an afterimage compensation for pixels included in a second display panel in the second image display apparatus, based on the received data results of the afterimage compensation performed for the pixels included in the first display panel in the first image display apparatus. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A system comprising: a plurality of image display apparatuses including at least a first image display apparatus and a second image display apparatus; and a control device controlling the first image display apparatus and the second image display apparatus, wherein the control device: controls the first image display apparatus to display a first image, controls the second image display apparatus to display a second image, controls the first image display apparatus to perform an afterimage compensation for pixels included in a first display panel in the first image display apparatus, receives, from the first image display apparatus, data results of the afterimage compensation for pixels included in the first display panel, and controls the second image display apparatus to perform an afterimage compensation for pixels included in a second display panel in the second image display apparatus, based on the received data results of the afterimage compensation performed for the pixels included in the first display panel in the first image display apparatus. ### Claim 17 (depends on 16) The system of claim 16, wherein the first image displayed by the first image display apparatus and the second image displayed by the second image display apparatus are the same images. ### Claim 18 (depends on 17) The system of claim 17, wherein the first image display apparatus: calculates a threshold voltage for each pixel included in the first display panel, determines an offset value corresponding to an amount of change in the threshold voltage, calculates an electron mobility for each pixel included in the first display panel, determines a gain value corresponding to the calculated electron mobility, and performs the afterimage compensation for the pixels included in the first display panel, based on at least one of the determined offset value and gain value. ### Claim 19 (depends on 18) The system of claim 18, wherein the first image display apparatus determines whether a result of performing the afterimage compensation satisfies a predetermined reference, based on at least one of the determined offset value and gain value. ### Claim 20 (depends on 19) The system of claim 19, wherein the first image display apparatus determines that the result of performing the afterimage compensation satisfies the predetermined reference when a number of pixels having the determined offset value equal to or greater than a reference offset value is greater than or equal to a first number, and when a number of pixels having the determined gain value equal to or greater than a reference gain value is greater than or equal to a second number. ### Claim 21 (depends on 20) The system of claim 20, wherein the control device: checks a ratio of a time when the first image is displayed through the first display panel and a time when the second image is displayed through the second display panel, when the data results of the afterimage compensation performed for the pixels included in the first display panel is received from the first image display apparatus, and transmits a control signal to the second image display apparatus to control the second image display apparatus to perform the afterimage compensation for the pixels included in the second display panel, when the checked ratio is a predetermined reference ratio or more. ### Claim 22 (depends on 20) The system of claim 20, wherein the control signal comprises data for a time when the first image is displayed through the first display panel of the first image display apparatus, and wherein the second image display apparatus: checks a ratio of a time when the first image is displayed through the first display panel and a time when the second image is displayed through the second display panel, when the control signal is received from the control device, and performs the afterimage compensation for the pixels included in the second display panel when the checked ratio exceeds a predetermined reference ratio. ### Claim 23 An image display apparatus comprising: a display including a display panel; an external device interface configured to transmit and receive a signal to and from a control device controlling the image display apparatus and at least one other image display apparatus; and a controller configured to: display an image on the display corresponding to an image signal received from the control device, perform an afterimage compensation for pixels included in the display panel, determine whether a result of performing the afterimage compensation for the pixels included in the display panel satisfies a predetermined reference, and transmit a signal including data indicating a result of performing the afterimage compensation to the control device through the external device interface unit, when the result of performing the afterimage compensation satisfies the predetermined reference. ### Claim 24 (depends on 23) The image display apparatus of claim 23, wherein the controller is further configured to: calculate a threshold voltage for each pixel included in the display panel, determine an offset value corresponding to an amount of change in the threshold voltage, calculate an electron mobility for each pixel included in the display panel, determine a gain value corresponding to the calculated electron mobility, and preform the afterimage compensation for the pixels included in the display panel, based on at least one of the determined offset value and gain value. ### Claim 25 (depends on 24) The image display apparatus of claim 24, wherein the controller is further configured to determine whether the result of performing the afterimage compensation satisfies the predetermined reference, based on at least one of the determined offset value and gain value. ### Claim 26 (depends on 25) The image display apparatus of claim 25, wherein the controller is further configured to determine the result of performing the afterimage compensation satisfies the predetermined reference, when at least one of a number of pixels having the determined offset value equal to or greater than a reference offset value is greater than or equal to a first number, and a when a number of pixels having the determined gain value equal to or greater than a reference gain value is greater than or equal to a second number. ### Claim 27 (depends on 26) The image display apparatus of claim 26, wherein the controller is further configured to perform the afterimage compensation for the pixels included in the display panel, when a control signal for instructing the performance of the afterimage compensation is received from the control device. ### Claim 28 (depends on 27) The image display apparatus of claim 27, wherein the control signal comprises data for a time when the image is displayed through the other image display apparatus, wherein the controller is further configured to: check a ratio of a time when the image is output through the other image display apparatus and a time when the image is displayed through the display panel, when the control signal is received from the control device, and perform the afterimage compensation for the pixels included in the display panel when the checked ratio is a predetermined reference ratio. ### Claim 29 (depends on 27) The image display apparatus of claim 27, wherein the image displayed through the image display apparatus is the same as the image displayed through the other image display apparatus. ### Claim 30 A control device for controlling at least a first image display apparatus and a second image display apparatus, the control device comprising: an external device interface configured to transmit and receive a signal to and from the first image display apparatus and the second image display apparatus; and a controller configured to: control the first image display apparatus to display a first image, control the second image display apparatus to display a second image, control the first image display apparatus to perform an afterimage compensation for pixels included in a first display panel in the first image display apparatus, receive, from the first image display apparatus, data results of the afterimage compensation for pixels included in the first display panel, and control the second image display apparatus to perform an afterimage compensation for pixels included in a second display panel in the second image display apparatus, based on the received data results of the afterimage compensation performed for the pixels included in the first display panel in the first image display apparatus. ### Claim 31 (depends on 30) The control device of claim 30, wherein the first image displayed by the first image display apparatus and the second image displayed by the second image display apparatus are the same images. ### Claim 32 (depends on 30) The control device of claim 30, wherein the controller is further configured to: check a ratio of a time when the first image is displayed through the first display panel and a time when the second image is displayed through the second display panel, when the data results of the afterimage compensation performed for the pixels included in the first display panel is received from the first image display apparatus, and transmit a control signal to the second image display apparatus to control the second image display apparatus to perform the afterimage compensation for the pixels included in the second display panel, when the checked ratio is a predetermined reference ratio or more. ### Claim 33 (depends on 30) The control device of claim 30, further comprising: a remote controller interface configured to receive a remote control signal. ### Claim 34 (depends on 33) The control device of claim 33, wherein the controller controls the first image display apparatus to perform the afterimage compensation for the pixels included in the first display panel, in response to receiving the remote control signal requesting the control device control the first image display apparatus to perform the afterimage compensation for the pixels included in the first display panel. ### Claim 35 (depends on 30) The control device of claim 30, wherein the controller controls the first image display apparatus to perform the afterimage compensation for the pixels included in the first display panel in response to the first display panel being used greater than a predetermined amount of time.