Chip-on-glass type liquid crystal display

Details Chip-on-glass type liquid crystal display Chip-on-glass type liquid crystal display

2006-09-05

2006-09-05

Shankar, Vijay (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S087000, C345S095000, C345S100000, C345S104000

Reexamination Certificate

active

07102611

ABSTRACT:
Disclosed is a chip-on-glass type liquid crystal display (LCD). The LCD is directed to provide a construction in a way that, while each wiring for supplying driver circuits with a driving voltage is directly formed on an LCD panel through application of COG (Chip-On-Glass) technology for producing TFT-LCD, even though the wirings are connected in series between the driver circuits, the driving voltage capable of normally operating the driver circuits is supplied to all driver circuits. To this end, in consideration of a voltage drop at the panel wiring, by increasing and outputting a driving voltage, the driving voltage inputted into an nthdriver circuit is made to be equal to the driving voltage inputted into an (n+1)thdriver circuit. To accomplish this object, a driving voltage generating section is provided to each driver IC, and comprises a charge pumping circuit for increasing the leading gate driving voltage to a predetermined level, and a buffer circuit for stabilizing an output voltage of the charge pumping circuit.

REFERENCES:
patent: 6388652 (2002-05-01), Yamazaki et al.
patent: 6624857 (2003-09-01), Nagata et al.
patent: 6756959 (2004-06-01), Fujino
patent: 6778164 (2004-08-01), Yamazaki et al.
patent: 2005/0017940 (2005-01-01), Yamazaki et al.

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