Image display apparatus

Details Image display apparatus Image display apparatus

2007-12-21

2011-11-22

Lao, Lun-Yi (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S077000, C345S078000, C345S082000, C345S690000, C345S691000, C345S204000, C315S169300

Reexamination Certificate

active

08063857

ABSTRACT:
When an organic EL display apparatus enables display of a standard luminance mode and a high luminance mode, it takes long time to reset the gate potential of the OLED drive TFT to a given value in a standard mode. In the reset operation of the gate potential of an OLED drive TFT at the time of writing an image signal, in a standard mode, a precharge current is allowed to flow in the OLED element for a short period before the reset operation to set an initial value of the gate potential of the OLED drive TFT to be close to a supply potential or a reference potential. With the above operation, the variation of the OLED drive TFT gate potential after resetting is reduced. As a result, the light emitting period during one frame can be extended. Also, since a blanking period can be extended, it is possible to measure the characteristic of the OLED element by using the blanking period.

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R.M.A. Dawson et al., “Design of an Improved Pixel for a Polysilicon active-Matrix Organic LED Display”, SID 98 Digest, pp. 11-14.

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