# US 2014/0192100 A1 · Burn-in reduction apparatus, self-luminous display apparatus, image processing apparatus, electronic device, burn-in reduction method, and computer program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192100 A1 - Document ID: US20140192100A1 - Status: Published application - Kind: A1 - Application number: 14/202,788 - Filed: 2014-03-10 - Published: 2014-07-10 - Earliest claimed: 2006-09-15 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Mitsuru Tada - Web page: https://patentgrep.com/patent/US20140192100A1 ## CPC - G09G 3/30: using electroluminescent panels - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/22: using controlled light sources - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping - G09G 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof - G09G 2320/066: for control of contrast - G09G 2360/144: the light being ambient light - 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 burn-in reduction apparatus, includes an illumination sensor configured to detect brightness of outside light incident on an area near a display screen; and a contrast control section configured to control a drive condition of a display device in accordance with the detected brightness to reduce a contrast ratio of display brightness steplessly or in a stepwise manner. ## Claims ### Claim at position 1 1-19. (canceled) ### Claim 20 A self-luminous display apparatus, comprising: a self-luminous display device including a driving circuitry and a plurality of pixels responsive to the driving circuitry; an illumination sensor configured to: detect an outside brightness of a display screen, and generate a brightness signal based on the detected outside brightness; and a contrast control circuitry configured to provide a first control signal and a second control signal to the self-luminous display device, wherein the first control signal and the second control signal are dependent on the brightness signal, wherein the driving circuitry is configured to variably control: an emission duty ratio of the plurality of pixels based on the first control signal, and a reference voltage based on the second control signal, wherein at least one of a white level and a black level of the plurality of pixels is dependent on the reference voltage. ### Claim 21 (depends on 21) The self-luminous display apparatus according to claim 21, wherein the contrast control circuitry is further configured to change a gradation conversion characteristic based on the brightness signal. ### Claim 22 (depends on 22) The self-luminous display apparatus according to claim 22, wherein: the self-luminous display device includes a plurality of data lines coupled to the plurality of pixels; and a video signal is converted to a voltage signal provided on the plurality of data lines based on the gradation conversion characteristic. ### Claim 23 (depends on 21) The self-luminous display apparatus according to claim 21, wherein the driving circuitry includes a data line driver configured to generate a voltage signal for the plurality of pixels based on a video signal. ### Claim 24 (depends on 24) The self-luminous display apparatus according to claim 24, wherein the reference voltage is a reference for the data line driver, and corresponds to a voltage signal for the white level or the black level. ### Claim 25 (depends on 21) The self-luminous display apparatus according to claim 21, wherein the driving circuitry includes a voltage source configured to generate the reference voltage based on the second control signal. ### Claim 26 (depends on 21) The self-luminous display apparatus according to claim 21, wherein each of the plurality of pixels includes: a light emitting element; a driving transistor configured to control a driving current to the light emitting element; and a switching transistor configured to switch the driving current, thereby controlling the emission duty ratio, wherein the light emitting element, the driving transistor and the switching transistor are serially connected between a first voltage line and a second voltage line. ### Claim 27 (depends on 21) The self-luminous display apparatus according to claim 21, wherein each of the plurality of pixels includes: a light emitting element; a driving transistor configured to control a driving current to the light emitting element; and a switching transistor configured to switch the driving current, thereby controlling the emission duty ratio, wherein the light emitting element, the driving transistor and the switching transistor are serially connected between a first voltage line and a second voltage line, and at least one of the first voltage line and the second voltage line is coupled to a voltage source. ### Claim 28 (depends on 28) The self-luminous display apparatus according to claim 28, wherein the driving circuitry includes a scan driver configured to provide control pulses for the switching transistor of each of the plurality of pixels. ### Claim 29 (depends on 28) The self-luminous display apparatus according to claim 28, wherein the light emitting element includes an organic electroluminescent (EL) element. ### Claim 30 A self-luminous display apparatus comprising: a self-luminous display panel including a plurality of pixels responsive to control circuitry; an illumination sensor configured to: detect an outside brightness of the self-luminous display panel, and generate a brightness signal based on the detected outside brightness; and the control circuitry configured to: generate a first control signal and a second control signal based on the brightness signal, variably control an emission duty ratio of the plurality of pixels based on the first control signal; and variably control a reference voltage based on the second control signal, wherein at least one of a white level and a black level of the plurality of pixels is based on the reference voltage. ### Claim 31 (depends on 31) The self-luminous display apparatus according to claim 31, wherein the control circuitry is further configured to change a gradation conversion characteristic based on the brightness signal. ### Claim 32 (depends on 32) The self-luminous display apparatus according to claim 32, wherein: the self-luminous display panel includes a plurality of data lines coupled to the plurality of pixels, and a video signal is converted to a voltage signal provided on the plurality of data lines based on the gradation conversion characteristic. ### Claim 33 (depends on 31) The self-luminous display apparatus according to claim 31, wherein the control circuitry is configured to: set the reference voltage to a first value when the illumination sensor detects a first brightness; and set the reference voltage to a second value when the illumination sensor detects a second brightness brighter than the first brightness, wherein a contrast ratio of an image displayed on the self-luminous display panel when setting the reference voltage to the second value is less than the contrast ratio when setting the reference voltage to the first value. ### Claim 34 (depends on 34) The self-luminous display apparatus according to claim 34, wherein the control circuitry is configured to: set the emission duty ratio to a third value when the illumination sensor detects the first brightness; and set the emission duty ratio to a fourth value smaller than the third value when the illumination sensor detects the third brightness darker than the first brightness. ### Claim 35 (depends on 31) The self-luminous display apparatus according to claim 31, wherein the illumination sensor is arranged at an upper periphery of the self-luminous display panel. ### Claim 36 (depends on 36) The self-luminous display apparatus according to claim 36, wherein the illumination sensor is arranged at a middle region of the upper periphery of the self-luminous display panel. ### Claim 37 (depends on 31) The self-luminous display apparatus according to claim 31, wherein the control circuitry is configured to control a contrast ratio of an image displayed on the self-luminous display panel steplessly or in a stepwise manner. ### Claim 38 A luminance control apparatus suitable for a self-luminescent device, comprising: an illumination sensor; and a control circuitry, wherein the illumination sensor is configured to: detect a brightness of an ambient light intensity, and generate a brightness signal based on the detected brightness; and the control circuitry is configured to: generate a first control signal and a second control signal based on the brightness signal, variably control an emission duty ratio of the self-luminescent device based on the first control signal, and variably control a reference voltage on which at least one of a maximum luminance level and a minimum luminance level of the self-luminescent device is dependent, based on the second control signal. ### Claim 39 (depends on 39) The luminance control apparatus according to claim 39, wherein the self-luminescent device includes a plurality of organic electroluminescent (EL) elements arranged in a matrix form.