Image display apparatus without occurence of nonuniform display

Details Image display apparatus without occurence of nonuniform display Image display apparatus without occurence of nonuniform display

2007-10-23

2007-10-23

Pham, Long (Department: 2814)

Active solid-state devices (e.g., transistors, solid-state diode

Non-single crystal, or recrystallized, semiconductor...

Amorphous semiconductor material

C257S291000, C345S082000

Reexamination Certificate

active

11128308

ABSTRACT:
A pixel drive circuit includes a drain voltage increase limiter circuit composed of a TFT device provided between a node and the drain of a TFT device serving as a current source, a capacitor and a switch. In a data write mode, switches are turned on to allow drive current to flow from a data line to the TFT devices. Then, respective gate voltages of the TFT devices are held in respective capacitors. In a display mode, only a switch is turned on to form a current path from a supply voltage to the TFT devices through a light-emitting diode. The voltage on a node is held constant regardless of channel modulation. Accordingly, desired electric current flows through the light-emitting diode.

REFERENCES:
patent: 6859193 (2005-02-01), Yumoto
patent: 2003-517806 (2002-06-01), None
patent: 2003-186440 (2003-07-01), None
patent: 99/65011 (1999-12-01), None

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