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Patent Searching and Data


Title:
DRIVER CIRCUIT OF LIQUID CRYSTAL DISPLAY APPARATUS
Document Type and Number:
Japanese Patent JP2007003563
Kind Code:
A
Abstract:

To reduce power consumption and prevent degradation of image quality by reducing the area of a driver circuit of a liquid crystal display apparatus.

The driver circuit 5 of the liquid crystal display apparatus includes: positive D/A converters PH and PL; negative D/A converters NH and NL; a positive selector 11; and a negative selector 21. The first positive D/A converter PL operates within a first positive voltage range GND-VDD1, and outputs first positive analog voltage signals V32P-V63P by D/A converting lower bit groups D0-D4 of digital signals. The second positive D/A converter PH operates within a second positive voltage range VDD1-VDD2, and outputs second positive analog voltage signals V0P-V31P by D/A converting lower bit groups D0-D4 of digital signals. The positive selector 11 selects, in accordance with the highest bit D5 of the digital signals, either the first or the second positive analog voltage signal as the positive analog voltage signal.


Inventors:
HASHIMOTO YOSHIHARU
Application Number:
JP2005180230A
Publication Date:
January 11, 2007
Filing Date:
June 21, 2005
Export Citation:
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Assignee:
NEC ELECTRONICS CORP
International Classes:
G09G3/36; G02F1/133; G09G3/20
Attorney, Agent or Firm:
Minoru Kudo