发明名称 |
SIGNAL LINE DRIVING CIRCUIT AND LIGHT EMITTING DEVICE |
摘要 |
Variations occur in the characteristics of transistors. The present invention is a signal-line drive circuit comprising first and second current source circuits corresponding to respective plurality of signal lines, a shift register, and n (n is a natural number of one or more) video-signal constant current source s, wherein each of the first and second current source circuits has a capacitance means and a supply means. The capacitance means held in one of the first and second source circuits converts a current including a current supplied from each of the n video-signal constant current source s to voltage in response to a sampling pulse supplied from the shift register and a latch pulse supplied from the exterior; and the supply means held in the other supplies a current responsive to the converted voltage. The values of the currents supplied from the n video-signal constant current source s are set to a proportion of 20: 21: . . . 2n.
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申请公布号 |
US2011234573(A1) |
申请公布日期 |
2011.09.29 |
申请号 |
US201113111363 |
申请日期 |
2011.05.19 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
KIMURA HAJIME |
分类号 |
G06F3/038;G09G3/20;G09G3/32;G09G3/36 |
主分类号 |
G06F3/038 |
代理机构 |
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