发明名称 |
Display device and controlling method thereof |
摘要 |
A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor Vds had to be set high (Vds≧Vgs−VTh+a). This caused high heat generation and power consumption because a voltage applied to the light emitting element. The invention is characterized by feedbacking a change in a current value in accordance with the deterioration of a light emitting element and a power source voltage controller which modifies a setting voltage. Namely, according to the invention, the setting voltage is to be set in the vicinity of the boundary (critical part) between a saturation region and a linear region, and a voltage margin for the deterioration is not required particularly for an initial setting voltage.
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申请公布号 |
US7773082(B2) |
申请公布日期 |
2010.08.10 |
申请号 |
US20080255235 |
申请日期 |
2008.10.21 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
MIYAGAWA KEISUKE;KOYAMA JUN |
分类号 |
G06F3/038;G09G3/32;G09G5/00 |
主分类号 |
G06F3/038 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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