06609807 is referenced by 11 patents and cites 3 patents.

A backlight

7

has light sources

2

, a flat-plate-shaped light guide plate

3

for guiding the light emitted from the light sources

2

in a predetermined direction, a light shield louver

5

, disposed so as to face the light guide plate

3

, for shielding part of the light emerging from the light guide plate

3

according to angles of incidence, and a prism sheet

8

for converting the brightness distribution of the light incident on the light shield louver

5

into a predetermined brightness distribution. Owing to the prism sheet

8

, the light incident on the light shield louver exhibits a brightness distribution such that brightness is at a minimum at an angle of incidence of 0°. Thus, the backlight

7

, and a liquid crystal display device

1

employing it, permits light to emerge therefrom within a desired range of viewing angles while offering high brightness within that range, with reduced degradation of viewability.

Title
Backlight and liquid crystal display device
Application Number
9/921753
Publication Number
6609807 (B2)
Application Date
August 6, 2001
Publication Date
August 26, 2003
Inventor
Kenichi Ukai
Uda-gun
US
Nobuyuki Takahashi
Kashiba
US
Hiroshi Torihara
Matsusaka
US
Agent
Nixon & Vanderhye P C
US
Assignee
Sharp Kabushiki Kaisha
US
IPC
F21V 7/04
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