Invention Grant
- Patent Title: Method and device to improve backlight uniformity
- Patent Title (中): 提高背光均匀性的方法和装置
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Application No.: US12168093Application Date: 2008-07-04
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Publication No.: US07646448B2Publication Date: 2010-01-12
- Inventor: James Robinson , Marc Drader , Michael Purdy
- Applicant: James Robinson , Marc Drader , Michael Purdy
- Applicant Address: CA Waterloo, Ontario
- Assignee: Research in Motion Limited
- Current Assignee: Research in Motion Limited
- Current Assignee Address: CA Waterloo, Ontario
- Agency: McCarthy Tétrault LLP
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02B6/00 ; G05D25/00 ; F21V7/04
Abstract:
A method for providing a hot spot filter for a light guide is provided by taking an image of the light output pattern of an illuminated light guide. The hot spot filter may be a film, a layer, or an additional liquid crystal display dedicated to attenuating bright spots from the light guide. The hot spot filter may be incorporated into the image display by adjusting the grey scale of individual pixels to provide sufficient compensation.
Public/Granted literature
- US20090010595A1 METHOD AND DEVICE TO IMPROVE BACKLIGHT UNIFORMITY Public/Granted day:2009-01-08
Information query
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