发明授权
- 专利标题: Compensated drive signal for electroluminescent display
- 专利标题(中): 用于电致发光显示的补偿驱动信号
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申请号: US12272222申请日: 2008-11-17
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公开(公告)号: US08358256B2公开(公告)日: 2013-01-22
- 发明人: John W. Hamer , Gary Parrett , Charles I. Levey
- 申请人: John W. Hamer , Gary Parrett , Charles I. Levey
- 申请人地址: US VA Herndon
- 专利权人: Global OLED Technology LLC
- 当前专利权人: Global OLED Technology LLC
- 当前专利权人地址: US VA Herndon
- 代理机构: Morgan, Lewis & Bockius LLP
- 主分类号: G09G3/30
- IPC分类号: G09G3/30
摘要:
Compensation is performed for initial nonuniformity or aging of drive transistors and electroluminescent (EL) emitters in 3T1C EL subpixels of an EL display, such as an organic light-emitting diode (OLED) display. A readout transistor connected to the EL emitter is used to readout the voltage of the emitter and compensation for ΔVth, ΔVEL, and OLED efficiency loss is performed using a model. Measurements are taken during a frame by driving a target subpixel at a higher luminance for a shorter time, then using the remaining time in the frame to measure. Measurements can be taken with an A/D converter or with a ramp generator and comparator. Compensation is performed for each subpixel individually.
公开/授权文献
- US20100123649A1 COMPENSATED DRIVE SIGNAL FOR ELECTROLUMINESCENT DISPLAY 公开/授权日:2010-05-20