Backlighting apparatus

Details Backlighting apparatus Backlighting apparatus

F - Mech Eng,Light,Heat,Weapons

21

V

F21V 8/00 (2006.01) G09F 13/18 (2006.01)

Patent

CA 2042060

Improved backlighting apparatus evenly illuminates positive and negative LCDs under all ambient lighting conditions. In- candescent lamps (301-304) provide light for distribution by a light pipe (101). The bottom of the light pipe (101) is selectively painted white to reflect light to the top of the light pipe (101) while the unpainted areas reflect light internal to the light pipe (101). controlling hot and dim spots. The corners of the light pipe (101) near the lamps (301-304) are dual angled to reflect the light into the center of the display. The burn-out of a lamp (301-304) will not substantially affect the even lighting capabilities of the appar- atus.

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