Title:
表示装置およびその駆動方法
Document Type and Number:
Japanese Patent JP4994454
Kind Code:
B2
Abstract:
An objective of the present invention is to provide a display device capable of correcting gamma characteristics in a simplified and expeditious manner upon renewal of a display portion, and also to provide a method for driving the same. When a liquid crystal display device is powered on, first, a source driver is supplied with tentative gradation reference voltages generated by a voltage dividing circuit having a plurality of resistances connected in a series, and the source driver generates a tentative gradation voltage group based on the tentative gradation reference voltages supplied therewith. Then, when a power supply circuit starts up, gradation voltage data supplied from a display control circuit is subjected to D/A conversion by a D/A converter, so that normal gradation reference voltages are generated. Once the normal gradation reference voltages are generated, they are supplied to the source driver in place of the tentative gradation reference voltages. Thereafter, the source driver generates normal gradation voltages based on the normal gradation reference voltages in place of the tentative gradation voltages.
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Inventors:
Matsukawa
Application Number:
JP2009523558A
Publication Date:
August 08, 2012
Filing Date:
March 17, 2008
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G09G3/36; G02F1/133; G09G3/20
Domestic Patent References:
| JP2002258816A | 2002-09-11 | |||
| JP2005049418A | 2005-02-24 | |||
| JP2004280063A | 2004-10-07 | |||
| JPH0359595A | 1991-03-14 |
Attorney, Agent or Firm:
Akihiro Shimada
Kenji Kawahara
Kunihiro Okuda
Kenji Kawahara
Kunihiro Okuda