Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2004-11-12
2008-12-16
Lewis, David L (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S100000, C345S204000, C327S333000, C327S536000, C327S537000
Reexamination Certificate
active
07466312
ABSTRACT:
Provided are a level shifter circuit and a corresponding method for controlling voltage levels of a clock signal and an inverted clock signal for driving gate lines of a ASG thin film transistor liquid crystal display panel, where the level shifter circuit includes first and second level shifters, the first level shifter controls the voltage level of the clock signal to swing between a negative external voltage level and a positive external voltage level in response to a clock activating signal, and increases the voltage level of the clock signal from the negative external voltage level to a power supply voltage level or decreases it from the positive external voltage level to a ground voltage level while a pre-charge clock activating signal is activated, the second level shifter controls the voltage level of the inverted clock signal to swing between the negative external voltage level and the positive external voltage level in response to an inverted clock activating signal, and increases the voltage level of the inverted clock signal from the negative external voltage level to the power supply voltage level or decreases it from the positive external voltage level to the ground voltage level while an inverted pre-charge clock activating signal is activated, and the level shifter circuit increases or decreases the voltage levels of the clock signal and inverted clock signal using a battery voltage or a ground voltage, thereby reducing current consumption caused by the increase or decrease in the voltage level.
REFERENCES:
patent: 6670944 (2003-12-01), Ishii
patent: 6700436 (2004-03-01), Shim
patent: 6836269 (2004-12-01), Maeda et al.
patent: 7248243 (2007-07-01), Murakami et al.
patent: 2005/0057481 (2005-03-01), Chung
patent: 9-6295 (1997-01-01), None
patent: 00-49583 (2000-02-01), None
patent: 01-326570 (2001-11-01), None
patent: 03-50352 (2003-06-01), None
patent: 1020030054896 (2003-07-01), None
patent: 1020030070265 (2003-08-01), None
English Abstract Only.
Choi Chul
Han Byung-Hun
Lee Jae-Goo
F. Chau & Associates LLC
Lewis David L
Samsung Electronics Co,. Ltd.
LandOfFree
Level shifter circuit and method for controlling voltage... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Level shifter circuit and method for controlling voltage..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Level shifter circuit and method for controlling voltage... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4024113