Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1996-12-13
1998-12-08
Luu, Matthew
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345212, G09G 500
Patent
active
058477020
ABSTRACT:
A liquid crystal display device capable of saving power consumption is provided. The liquid crystal display device reduces the power consumption by decreasing an output voltage of a voltage dividing element thereof and by changing common output signals (alternating current) of a row driver and segment output signals of a column driver make direct current uniformly. In order to achieve the above object, the LCD of this invention includes: a central processing unit for producing data signals when the display device is in on-condition and a power down signal when the display device is in off-condition; a liquid crystal driver controller for receiving an input voltage and divided voltages and for producing an first voltage, segment-output signals and common-output signals when the central processing unit produces the data signals, and for producing a second voltage and direct current voltages when the central processing unit produces the power down signal. In this device, the first voltage is higher than the second voltage in magnitude; the voltage dividing element divides the first or second voltages and produces the divided voltages to the liquid crystal driver controller; and a liquid crystal display panel receives the segment-output signals and common-output signals and displays information of the central processing unit.
REFERENCES:
patent: 5130703 (1992-07-01), Fairbanks et al.
patent: 5315311 (1994-05-01), Honkala
patent: 5343221 (1994-08-01), Arakawa et al.
Luu Matthew
Samsung Electronics Co,. Ltd.
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