发明名称 |
Light emitting device with current control |
摘要 |
<p>A light emitting device is provided, in which a change of luminance of an OLED is suppressed and a desired color display can be stably performed even if an organic light emitting layer is somewhat deteriorated or an environmental temperature is varied. Separately from a pixel portion for displaying an image, a pixel portion for measuring a driving current of the OLED is provided in the light emitting device. The driving current is measured in the pixel portion for measuring the driving current of the OLED, and a value of the voltage supplied to the above two pixel portions from a variable power supply is corrected such that the measured driving current has a reference value. With the above-described structure, a reduction of the luminance accompanied with the deterioration of the organic light emitting layer can be suppressed. As a result, a clear image can be displayed. <IMAGE></p> |
申请公布号 |
EP1227467(A2) |
申请公布日期 |
2002.07.31 |
申请号 |
EP20020001895 |
申请日期 |
2002.01.28 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
INUKAI, KAZUTAKA;IWABUCHI, TOMOYUKI |
分类号 |
G09G3/30;G09G3/20;G09G3/32;(IPC1-7):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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