Optical plate having triangular pyramidal depressions and...

Details Optical plate having triangular pyramidal depressions and... Optical plate having triangular pyramidal depressions and...

Filed on

2011-08-09

Date issued

2011-08-09

Examiner

Cariaso, Alan (Department: 2885)

Patent Class

Illumination

SubClass

Display backlight

Other Related Categories

C362S309000, C362S330000, C362S339000

Type

Reexamination Certificate

Status

active

Patent number

07993020

Description

ABSTRACT:
An optical plate includes a light output surface and a bottom surface opposite to the light output surface. The light output surface defines a plurality of triangular pyramidal depressions and a plurality of four-sided pyramidal depressions. Each four-sided pyramidal depression is surrounded by four triangular pyramidal depressions.

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patent: 7715132 (2010-05-01), Chang
patent: 7753565 (2010-07-01), Hsu et al.
patent: 2009/0323326 (2009-12-01), Chang

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