Invention Grant
- Patent Title: Flat lighting device and liquid crystal display device
- Patent Title (中): 平面照明装置和液晶显示装置
-
Application No.: US11692997Application Date: 2007-03-29
-
Publication No.: US07690830B2Publication Date: 2010-04-06
- Inventor: Nobuyuki Koganezawa , Akiyoshi Tobe , Fumiyuki Sato
- Applicant: Nobuyuki Koganezawa , Akiyoshi Tobe , Fumiyuki Sato
- Applicant Address: JP JP
- Assignee: Hitachi Displays, Ltd.,Hitachi Display Devices, Ltd.
- Current Assignee: Hitachi Displays, Ltd.,Hitachi Display Devices, Ltd.
- Current Assignee Address: JP JP
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2006-101903 20060403
- Main IPC: F21V7/04
- IPC: F21V7/04
Abstract:
The present invention makes a radiation angle of light at a portion of a light guide plate in front of an LED formed on one edge of a light guide plate and a radiation angle of light at a corner portion of the light guide plate equal to each other as much as possible. A shape of beam control elements which are arranged on a lower surface of a light guide plate is arranged concentrically about the LED.
Public/Granted literature
- US20070230214A1 Flat Lighting Device and Liguid Crystal Display Device Public/Granted day:2007-10-04
Information query
