发明名称 |
DISPLAY DEVICE AND LIGHT EMITTING DEVICE |
摘要 |
<p>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.</p> |
申请公布号 |
KR20100005247(A) |
申请公布日期 |
2010.01.14 |
申请号 |
KR20097026829 |
申请日期 |
2003.10.21 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
MIYAGAWA KEISUKE;KOYAMA JUN |
分类号 |
G09G3/30;G09G3/20;G09G3/32 |
主分类号 |
G09G3/30 |
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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