US Patent 7445367 Method and device to improve backlight uniformity
Patent 7445367 was granted and assigned to BlackBerry on November, 2008 by the United States Patent and Trademark Office.
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Patent abstract
A hot spot filter for a light guide is created 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.
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US Patent 07445367 Method and device to improve backlight uniformity US Patent 7445367 Method and device to improve backlight uniformity
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Patent Number
0744536700
Patent Number
744536700
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Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
074453670
Date of Patent
November 4, 2008
0Patent Application Number
117803140
Date Filed
July 19, 2007
0Official Website
Patent Primary Examiner
Edits on 24 Sep, 2022
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Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
074453670
Date of Patent
November 4, 2008
0Patent Application Number
117803140
Date Filed
July 19, 2007
0Official Website
Patent Primary Examiner
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US Patent 07445367 Method and device to improve backlight uniformity
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07445367
Date of patent
November 4, 2008
Patent application number
11780314
Date Filed
July 19, 2007
Patent primary examiner
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