Invention Grant
- Patent Title: Light emitting device, driving method of light emitting device and electronic device
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Application No.: US15860725Application Date: 2018-01-03
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Publication No.: US10068953B2Publication Date: 2018-09-04
- Inventor: Shunpei Yamazaki , Mai Akiba , Jun Koyama
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Fish & Richardson P.C.
- Priority: JP2001-290290 20010921
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L27/32 ; G09G3/3225 ; H01L27/12 ; H01L51/52 ; G09G3/3233 ; G09G3/3258 ; H01L27/15 ; G09G3/3283 ; G09G3/3241 ; H01L33/32 ; H01L27/13 ; H01L29/66 ; H01L33/20 ; H01L29/49 ; H01L51/00 ; G09G3/325 ; G09G3/22 ; G09G3/20
Abstract:
By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.
Public/Granted literature
- US20180145120A1 LIGHT EMITTING DEVICE, DRIVING METHOD OF LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE Public/Granted day:2018-05-24
Information query
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