# US 2014/0152633 A1 · Organic light emitting display device and method for operating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152633 A1 - Document ID: US20140152633A1 - Status: Published application - Kind: A1 - Application number: 13/958,299 - Filed: 2013-08-02 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Jeong Hyo PARK; Byung Chul AHN; Ho Min LIM - Web page: https://patentgrep.com/patent/US20140152633A1 ## CPC - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - 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 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2320/041: Temperature compensation - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - 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 Disclosed is an organic light emitting display device, which is capable of compensating for variations in the characteristics of driving transistors, comprising a display panel including a plurality of pixels, each pixel having a driving transistor for operating a light emitting device to make the light emitting device emit light with a data current corresponding to a data voltage; a panel driver for detecting the characteristics of the driving transistors including at least one of mobility and threshold voltage of the driving transistor included in each pixel during a time period when there exists no user around the display panel, generating compensated input data by compensating input data according to the characteristics after the detection of the characteristics is completed, and generating data voltage through the use of the compensated input data; and a sensor for sensing whether or not there exists a user around the display panel, and supplying the sensing result to the panel driver. ## Claims ### Claim 1 An organic light emitting display device comprising: a display panel including a plurality of pixels, wherein each pixel has a driving transistor for operating a light emitting device so as to make the light emitting device emit light with a data current corresponding to a data voltage; a panel driver for detecting characteristics of the driving transistor included in each pixel including at least one of mobility and threshold voltage of the driving transistor during a time period when there exists no user around the display panel, generating compensated input data by compensating input data according to the characteristics after the detection of the characteristics of the driving transistor included in each pixel is completed, and generating voltage data through the use of the compensated input data; and a sensor for sensing whether or not there exists a user around the display panel, and supplying the sensing result to the panel driver. ### Claim 2 (depends on 1) The device of claim 1, wherein the panel driver determines a detection order for horizontal lines of pixels in which to detect the characteristics of the driving transistor included in each pixel of each horizontal line according to at least one of luminance and frequency components of the pixels included in each horizontal line. ### Claim 3 (depends on 2) The device of claim 2, wherein the panel driver sequentially determines the detection order from a horizontal line with a highest average luminance to a horizontal line with a lowest average luminance. ### Claim 4 (depends on 2) The device of claim 2, wherein the panel driver converts luminance values of the pixels included in each horizontal line into frequency components, determines the highest frequency component in each horizontal line as a representative frequency value, and sequentially determines the detection order from a horizontal line with a highest representative frequency value to a horizontal line with a lowest representative frequency value. ### Claim 5 (depends on 1) The device of claim 1, wherein the sensor senses whether or not there exists a user around the display panel by the use of at least one of a thermal sensor, an infrared sensor, and a photo sensor. ### Claim 6 A method of operating an organic light emitting display device comprising: detecting characteristics of driving transistors included in each pixel of the display device during a time period when there exists no user around a display panel, the characteristics including at least one of mobility and threshold voltage of the driving transistor; generating a data voltage by compensating for input data according to the characteristics after the detection for the characteristics of driving transistors included in each pixel is completed; and supplying a data current corresponding to the data voltage to a light emitting device included in the display panel so as to make the light emitting device emit light. ### Claim 7 (depends on 6) The method of claim 6, further comprising determining a detection order for horizontal lines of pixels in which to detect the characteristics of the driving transistor included in each pixel of each horizontal line according to at least one of luminance and frequency components of the pixels included in each horizontal line of the display panel. ### Claim 8 (depends on 7) The method of claim 7, wherein, the detection order is determined in sequential order from a horizontal line with a highest average luminance to a horizontal line with a lowest average luminance. ### Claim 9 (depends on 7) The method of claim 7, wherein, in the step of determining the detection order, luminance values of pixels included in each horizontal line are converted into frequency components, a highest frequency component is determined as a representative frequency value for each horizontal line, and the detection order is determined in sequential order from a horizontal line with a highest representative frequency value to a horizontal line with a lowest representative frequency value. ### Claim 10 (depends on 6) The method of claim 6, further comprising sensing whether or not there exists a user around the display panel through at least one of a temperature change sensed by use of a thermal sensor, and a change of image taken by use of a photo sensor.