Title:
発光装置及びそれを用いた電気器具
Document Type and Number:
Japanese Patent JP4067878
Kind Code:
B2
Abstract:
A light-emitting device which consumes a decreased amount of electric power without continuously and repetitively processing the same digital signals by the external circuit and by the drive circuit, and a method of driving the same. A plurality of storage circuits are arranged in each pixel in the light-emitting device. The plurality of pixels are divided into blocks. A D/A converter circuit is provided for each of the blocks. The digital signals stored in the storage circuits in each pixel are successively converted into analog signals through the D/A converter, and are input to a capacitor and to a gate electrode of a current-controlling TFT in the corresponding pixel. This constitution makes it possible to lower the consumption of electric power and to increase the numerical aperture.
Inventors:
Jun Koyama
Application Number:
JP2002165372A
Publication Date:
March 26, 2008
Filing Date:
June 06, 2002
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G09G3/30; H01L51/50; G09G3/20; G09G3/32; H05B33/14
Domestic Patent References:
| JP2002140034A | ||||
| JP2002140053A | ||||
| JP2002132217A | ||||
| JP8286170A | ||||
| JP2148687A | ||||
| JP2001290457A | ||||
| JP63311388A |
Foreign References:
| WO2001073738A1 |