Invention Grant
- Patent Title: Lighting system
- Patent Title (中): 照明系统
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Application No.: US13442100Application Date: 2012-04-09
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Publication No.: US08441184B2Publication Date: 2013-05-14
- Inventor: Junichiro Sakata
- Applicant: Junichiro Sakata
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2005-301837 20051017
- Main IPC: G09G3/10
- IPC: G09G3/10

Abstract:
The present invention provides a lighting system which uses a stacked light emitting element provided with a plurality of light emitting units and causes little change in emission color even after a long time of usage. A lighting system is provided, including a first light emitting element including a plurality of light emitting units; a second light emitting element; a first control means which controls light emission of the first light emitting element; and a second control means which controls light emission of the second light emitting element, where the first light emitting element emits light of a first emission color that is an initial emission color and a second emission color that is an emission color after change over time, and the second light emitting element emits light of a complementary color of the second emission color. The above structure suppresses color shift due to change over time.
Public/Granted literature
- US20120257382A1 Lighting System Public/Granted day:2012-10-11
Information query
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