Invention Application
US20140362092A1 LIGHT EMITTING DIODE (LED) BACKLIGHT WITH REDUCED HOTSPOT FORMATION
审中-公开
LED发光二极管(LED)背光,具有减少HOTSPOT形成
- Patent Title: LIGHT EMITTING DIODE (LED) BACKLIGHT WITH REDUCED HOTSPOT FORMATION
- Patent Title (中): LED发光二极管(LED)背光,具有减少HOTSPOT形成
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Application No.: US13912626Application Date: 2013-06-07
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Publication No.: US20140362092A1Publication Date: 2014-12-11
- Inventor: Xiang-Dong Mi , Jignesh Gandhi , Jianru Shi
- Applicant: Pixtronix, Inc.
- Main IPC: F21V8/00
- IPC: F21V8/00

Abstract:
This disclosure provides systems, methods and apparatus for reducing hotspots in backlit displays. Hotspot artifacts in multi-color backlit displays can be reduced by incorporating optical structures along the edges of light guides incorporated into the backlights. The optical structures are positioned adjacent to light emitting modules that emit light into the light guide. Light emitted from the light emitting modules passes through the optical structures before entering the light guide. Hotspot size can be reduced by appropriately configuring the shapes and sizes of these optical structures. In some implementations, the optical structures may include serrations along the side of the light guide adjacent to the light sources. In some other implementations, the optical structures may include dimples. Size of hotspots may also be reduced by reducing the distance between adjacent light sources of the same color.
Public/Granted literature
- US1771816A Regulating transformer Public/Granted day:1930-07-29
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