JPH04280225A - Back light - Google Patents
Back lightInfo
- Publication number
- JPH04280225A JPH04280225A JP6769991A JP6769991A JPH04280225A JP H04280225 A JPH04280225 A JP H04280225A JP 6769991 A JP6769991 A JP 6769991A JP 6769991 A JP6769991 A JP 6769991A JP H04280225 A JPH04280225 A JP H04280225A
- Authority
- JP
- Grant status
- Application
- Patent type
- Prior art keywords
- surface
- light
- light source
- reflecting plate
- linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To provide a sufficient brightness with a small size by providing a linear light source the surface of which is covered with a light reflecting plate and specifying the distance between its surface and the light reflecting plate surface covering it.
CONSTITUTION: A light diffuse reflecting plate 3 covers almost the whole surface of the face of a light guide plate 1 covered with a light scattering material 7. A liner light source 4 is covered with a reflector 5 having a clearance for entering light to the end part of the light guide plate 1 while keeping a clearance of a certain width with the light source surface, and a light reflecting plate 6 is disposed in the state covering the linear light source 4 between the reflector 5 and the linear light source 4. In this case, the surface of the linear light source 4 and the light reflecting plate 6 surface covering it are disposed while keeping a certain condition. Namely, when the side opposite to the light guide plate 1 of the linear light source 4 surface is the inside and the opposite side the outside, the distance between the surface of the linear light source 4 in nearly the center part of the outside and the light reflecting plate 6 surface covering it is less than 3 mm, and the distance in the part except the center part of the outside is smaller than that in the center part or substantially 0mm.
COPYRIGHT: (C)1992,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6769991A JPH04280225A (en) | 1991-03-08 | 1991-03-08 | Back light |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6769991A JPH04280225A (en) | 1991-03-08 | 1991-03-08 | Back light |
| EP19920102820 EP0500089B1 (en) | 1991-02-21 | 1992-02-20 | Back lighting device |
| US07838337 US5262928A (en) | 1991-02-21 | 1992-02-20 | Back lighting device |
| DE1992612662 DE69212662D1 (en) | 1991-02-21 | 1992-02-20 | A device for backlighting |
| DE1992612662 DE69212662T2 (en) | 1991-02-21 | 1992-02-20 | A device for backlighting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04280225A true true JPH04280225A (en) | 1992-10-06 |
Family
ID=13352464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6769991A Pending JPH04280225A (en) | 1991-03-08 | 1991-03-08 | Back light |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04280225A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284618A (en) * | 1988-06-02 | 1990-03-26 | Mitsubishi Rayon Co Ltd | Panel light source element |
| JPH02160215A (en) * | 1988-08-18 | 1990-06-20 | Nippon Sekiei Glass Kk | Back light for liquid crystal panel |
| JPH039305A (en) * | 1989-06-07 | 1991-01-17 | Mitsubishi Petrochem Co Ltd | Backlight device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284618A (en) * | 1988-06-02 | 1990-03-26 | Mitsubishi Rayon Co Ltd | Panel light source element |
| JPH02160215A (en) * | 1988-08-18 | 1990-06-20 | Nippon Sekiei Glass Kk | Back light for liquid crystal panel |
| JPH039305A (en) * | 1989-06-07 | 1991-01-17 | Mitsubishi Petrochem Co Ltd | Backlight device |
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