[미국특허]
Organic light emitting display device and method of driving the same to include a compensation strategy applied during different time periods
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-003/038
G09G-005/00
G09G-003/32
출원번호
US-0100894
(2013-12-09)
등록번호
US-9489888
(2016-11-08)
우선권정보
KR-10-2012-0152560 (2012-12-24)
발명자
/ 주소
Kim, Jung Hyeon
Kim, Bum Sik
Kim, Seung Tae
Lim, Myung-Gi
출원인 / 주소
LG Display Co., Ltd.
대리인 / 주소
Brinks Gilson & Lione
인용정보
피인용 횟수 :
3인용 특허 :
1
초록▼
A method of driving an organic light emitting display device includes sensing characteristics of driving TFTs of pixels to generate sensing data at a power-on time when the organic light emitting display device is powered on, merging initial compensation data and the sensing data at the power-on tim
A method of driving an organic light emitting display device includes sensing characteristics of driving TFTs of pixels to generate sensing data at a power-on time when the organic light emitting display device is powered on, merging initial compensation data and the sensing data at the power-on time to compensate for the characteristics of the driving TFTs of all the pixels, displaying an image in a driving mode and sequentially sensing characteristics of driving TFTs of a plurality of pixels in units of one horizontal line in real time during a blank interval between frames, and sequentially compensating for the characteristics of the driving TFTs of the pixels in units of one horizontal line in real time by using a real-time sensing data generated by real-time sensing.
대표청구항▼
1. An organic light emitting display device, which includes a display panel including a plurality of pixels each including a pixel circuit for emitting light from an organic light emitting diode, the organic light emitting display device comprising: a driving circuit unit including a data driver and
1. An organic light emitting display device, which includes a display panel including a plurality of pixels each including a pixel circuit for emitting light from an organic light emitting diode, the organic light emitting display device comprising: a driving circuit unit including a data driver and a gate driver;a sensing unit configured to: during a power-on period corresponding to when the display device is powered on following a release of the display device and before an image is displayed on the display panel for a power cycle, operate the data driver and the gate driver of the driving circuit unit in a sensing mode to sense characteristics of all the pixels of the display panel to generate sensing data based on the sensed characteristics; andduring a driving mode following the power-on period and within the same power cycle, sequentially sensing characteristics of driving thin film transistors(TFTs) of the plurality of pixels in units of one horizontal line in real time during a blank interval between image frames being displayed to generate real-time sensing data;a compensation data calculating unit in communication with the sensing unit and configured to: load an initial compensation data generated based on an initial compensation performed before the display device is released;merge the sensing data and the initial compensation data to generate updated compensation data; andgenerate real-time compensation data based on the real-time sensed data; anda panel driving unit configured to: supply data voltages compensated according to the updated compensation data during the power-on period and according to the real-time compensation data during the driving mode. 2. The organic light emitting display device of claim 1, wherein the sensing unit senses the characteristics of the driving TFTs of the respective pixels at the power-on period when the OLED is powered on to generate a first sensing data, and wherein the sensing unit supplies the first sensing data to the compensation data calculating unit at the power-on period. 3. The organic light emitting display device of claim 2, wherein the compensation data calculating unit reflects the first sensing data in initial compensation data to update compensation data, and stores the updated compensation data in a memory, the initial compensation data being generated when initial compensation is performed before the display panel is released. 4. The organic light emitting display device of claim 1, wherein the panel driving unit supplies data voltages compensated by the compensation data to the respective pixels to enable an image to be displayed in the driving mode, and compensates for the characteristics of the driving TFTs of the respective pixels. 5. The organic light emitting display device of claim 1, wherein in the driving mode, characteristics of driving TFTs of a plurality of pixels are sequentially sensed in real time in units of one horizontal line during a blank interval between frames, and are sequentially compensated for in real time in units of one horizontal line by using a real-time sensing data generated by real-time sensing. 6. A method of driving an organic light emitting display device which includes a display panel including a plurality of pixels including a pixel circuit for emitting light from an organic light emitting diode (OLED) and a driving circuit unit driving the display panel, the method comprising: generating initial compensation data based on an initial compensation performed before the display device is released;during a power-on period corresponding to when the display device is powered on following the release of the display device and before an image is displayed on the display panel for a power cycle, sensing characteristics of driving thin film transistors (TFTs) of the plurality of pixels to generate sensing data;merging the initial compensation data and the sensing data during the power-on period to compensate for the characteristics of the driving TFTs of the plurality of pixels after the display device is released;displaying a plurality of image frames in a driving mode following the power-on period and within the same power cycle, and sequentially sensing characteristics of driving TFTs of the plurality of pixels in units of one horizontal line in real time during a blank interval between image frames being displayed to generate real-time sensing data; andsequentially compensating for the characteristics of the driving TFTs of the pixels in units of one horizontal line in real time based on the real-time sensing data generated by real-time sensing during the driving mode. 7. The method of claim 6, wherein the sensing at the power-on period senses changes in characteristics of the driving TFTs of the plurality of pixels to compensate for the characteristics of the driving TFTs of the plurality of pixels, before display of an image is started by supply of power to the display device. 8. The method of claim 6, further comprising updating the initial compensation data using the sensing data by sensing at the power-on period. 9. A method of driving an organic light emitting display device which includes a display panel including a plurality of pixels each including a pixel circuit for emitting light from an organic light emitting diode (OLED) and a driving thin film transistor (TFT), the method comprising: generating initial compensation data based on an initial compensation performed before the display device is released;performing a sensing operation to generate sensing data at at least one of a power-on period when the OLED is powered on following the release of the display device and before an image is displayed on the display panel for a power cycle, a driving mode following the power-on period and within the same power cycle when a plurality of image frames are displayed on the display panel, and a power-off period when the OLED is powered off indicating an end to the same power cycle, wherein the sensing data corresponds to a threshold voltage of the driving TFT;updating initial compensation data by merging the initial compensation data with the sensing data to generate an updated compensation data; anddriving the driving TFT based on the updated compensation data. 10. The method of claim 9, wherein the sensing operation includes a first sensing operation performed at the power-on period before the driving mode is started. 11. The method of claim 10, wherein the first sensing operation is performed for about 2 seconds. 12. The method of claim 10, wherein the sensing operation includes a second sensing operation performed during the driving mode when an image is displayed and during a blank interval between image frames. 13. The method of claim 12, wherein the second sensing operation is performed when a data voltage compensated by the sensing data generated at the first sensing operation is supplied to a display panel to display an image. 14. The method of claim 10, wherein the sensing operation includes a third sensing operation performed at the power-off time when the OLED is powered off. 15. The method of claim 14, further comprising applying the sensing data generated at the third sensing operation at a next power-on time. 16. The method of claim 14, wherein the third sensing operation is performed for 30-60 seconds. 17. The method of claim 9, wherein the sensing operation is performed at a power-on time for a period of time shorter than the time when the sensing operation is performed at a power-off time. 18. The method of claim 9, further comprising calculating a compensation data based on the sensing data. 19. The method of claim 18, further comprising correcting an external input data to a data driver based on the compensation data.
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이 특허에 인용된 특허 (1)
Wang, Shou-Cheng; Peng, Du-Zen, OLED display, information device, and method for displaying an image in OLED display.
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