Title:
表示装置
Document Type and Number:
Japanese Patent JP4627822
Kind Code:
B2
Abstract:
An EL display device capable of producing a vivid multi-gradation color display, and an electronic device having the EL display device. An electric current supplied to an EL element 110 is controlled by providing a resistor 109 between a current control TFT 108 and the EL element 110 formed in a pixel 104, the resistor 109 having a resistance higher than the on-resistance of the current control TFT 108. The gradation display is executed by a time-division drive system which controls the emission and non-emission of light of the EL element 110 by time, preventing the effect caused by a dispersion in the characteristics of the current control TFT 108.
Inventors:
Jun Koyama
Application Number:
JP17652199A
Publication Date:
February 09, 2011
Filing Date:
June 23, 1999
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G09G3/30; G02F1/136; G09F9/30; G09G3/20; G09G3/32; H01L27/15; H01L27/32; H01L51/50; H05B33/12; H05B33/14
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Foreign References:
| WO1998040871A1 |