Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-07-22
2008-07-22
Osorio, Ricardo L (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S076000, C345S204000, C315S169300
Reexamination Certificate
active
10634337
ABSTRACT:
In a pixel circuit of an organic EL display device, a gate of a driving transistor is coupled to a gate of a compensating transistor, which is configured to operate as a diode. A precharge voltage is applied to the gate of the driving transistor while a selection signal is applied to a previous scan line, so that the compensating transistor is biased in a forward direction to apply a data voltage on the gate of the drive transistor. The driving transistor may be electrically isolated from the organic EL element (OLED) while precharging, so as to prevent the OLED from emitting a light using the precharge voltage. In addition, the driving transistor may be electrically isolated from the OLED while the data voltage is being charged, so as to prevent the OLED from emitting a light.
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Chung Bo-Yong
Kwak Won-Kyu
Oh Choon-Yul
Park Yong-Sung
Ryu Do-Hyung
Christie Parker & Hale LLP
Osorio Ricardo L
Samsung SDI & Co., Ltd.
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