Invention Grant
- Patent Title: Lighting device
- Patent Title (中): 照明设备
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Application No.: US13271565Application Date: 2011-10-12
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Publication No.: US08269225B2Publication Date: 2012-09-18
- Inventor: Yasuyuki Arai
- Applicant: Yasuyuki Arai
- 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: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2004-152365 20040521
- Main IPC: H01L27/15
- IPC: H01L27/15
Abstract:
An object of the invention is to provide a lighting device which can suppress luminance nonuniformity in a light emitting region when the lighting device has large area. A layer including a light emitting material is formed between a first electrode and a second electrode, and a third electrode is formed to connect to the first electrode through an opening formed in the second electrode and the layer including a light emitting material. An effect of voltage drop due to relatively high resistivity of the first electrode can be reduced by electrically connecting the third electrode to the first electrode through the opening.
Public/Granted literature
- US20120119251A1 LIGHTING DEVICE Public/Granted day:2012-05-17
Information query
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