JPS6445002A - Panel lighting appliance - Google Patents
Panel lighting applianceInfo
- Publication number
- JPS6445002A JPS6445002A JP20205687A JP20205687A JPS6445002A JP S6445002 A JPS6445002 A JP S6445002A JP 20205687 A JP20205687 A JP 20205687A JP 20205687 A JP20205687 A JP 20205687A JP S6445002 A JPS6445002 A JP S6445002A
- Authority
- JP
- Japan
- Prior art keywords
- light
- lead
- lamp
- diffusing surface
- light guide
- 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.)
- Granted
Links
Abstract
PURPOSE: To sufficiently uniformize brightness on a luminescent surface by arranging a light source lamp and a plate-shaped light guide, using the surface and the back of the light guide as a light lead through surface and a light diffusing surface having the specified constitution, and installing the light diffusing surface above the light lead through surface. CONSTITUTION: A straight fluorescent lamp 1 for a light source and a light guide 2 are arranged within a box body 10. The light guide 2 is made of a transparent material, the surface acts as a light lead through surface 21 and the back acts as a light diffusing surface 22. The light lead through surface 21 is convex, and the distance to the light diffusing surface 22 becomes maximum in the middle part, and becomes minimum in the most distant position from the lamp 1. The light diffusing surface 22 consists of a reflecting part 23 and a transmitting part 24 parallel each other, the distribution density of the reflecting part 23 varies with the distance from the lamp 1, becomes maximum in the middle part, and monotonously increases with distance in the other part. Light incident to the light guide 2 from the lamp 1 is totally reflected on the light lead through surface 21, then reflected on the light diffusing surface 22, and outgoes through the light lead through surface 21 and a diffusing surface 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202056A JP2603649B2 (en) | 1987-08-13 | 1987-08-13 | Surface lighting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202056A JP2603649B2 (en) | 1987-08-13 | 1987-08-13 | Surface lighting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6445002A true JPS6445002A (en) | 1989-02-17 |
JP2603649B2 JP2603649B2 (en) | 1997-04-23 |
Family
ID=16451210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62202056A Expired - Lifetime JP2603649B2 (en) | 1987-08-13 | 1987-08-13 | Surface lighting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2603649B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5130898A (en) * | 1989-05-18 | 1992-07-14 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
US5667289A (en) * | 1989-05-18 | 1997-09-16 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
US5949505A (en) * | 1992-07-13 | 1999-09-07 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
US7128457B2 (en) | 2002-05-23 | 2006-10-31 | 3M Innovative Properties Company | Surface light-emitting device |
CN103308973A (en) * | 2012-03-15 | 2013-09-18 | 欧姆龙株式会社 | Surface light source device |
CN111610594A (en) * | 2020-06-24 | 2020-09-01 | 京东方科技集团股份有限公司 | Backlight module and display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5435776A (en) * | 1977-08-25 | 1979-03-16 | Seiko Epson Corp | Liquid crystal watch |
JPS5981683A (en) * | 1982-11-02 | 1984-05-11 | 株式会社東芝 | Liquid crystal display |
JPS6223022A (en) * | 1985-07-23 | 1987-01-31 | Canon Inc | Lighting device |
JPS6273206A (en) * | 1985-09-27 | 1987-04-03 | Hitachi Ltd | Photoconductive plate |
-
1987
- 1987-08-13 JP JP62202056A patent/JP2603649B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5435776A (en) * | 1977-08-25 | 1979-03-16 | Seiko Epson Corp | Liquid crystal watch |
JPS5981683A (en) * | 1982-11-02 | 1984-05-11 | 株式会社東芝 | Liquid crystal display |
JPS6223022A (en) * | 1985-07-23 | 1987-01-31 | Canon Inc | Lighting device |
JPS6273206A (en) * | 1985-09-27 | 1987-04-03 | Hitachi Ltd | Photoconductive plate |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5130898A (en) * | 1989-05-18 | 1992-07-14 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
US5667289A (en) * | 1989-05-18 | 1997-09-16 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
US5931555A (en) * | 1989-05-18 | 1999-08-03 | Seiko Epson Corporation | Background lighting apparatus for liquid crystal display |
US5949505A (en) * | 1992-07-13 | 1999-09-07 | Seiko Epson Corporation | Surface-type illumination device and liquid crystal display |
US7128457B2 (en) | 2002-05-23 | 2006-10-31 | 3M Innovative Properties Company | Surface light-emitting device |
CN103308973A (en) * | 2012-03-15 | 2013-09-18 | 欧姆龙株式会社 | Surface light source device |
JP2013191501A (en) * | 2012-03-15 | 2013-09-26 | Omron Corp | Planar light source device |
CN106199816A (en) * | 2012-03-15 | 2016-12-07 | 欧姆龙株式会社 | Planar light source device |
CN111610594A (en) * | 2020-06-24 | 2020-09-01 | 京东方科技集团股份有限公司 | Backlight module and display device |
CN111610594B (en) * | 2020-06-24 | 2022-08-16 | 京东方科技集团股份有限公司 | Backlight module and display device |
Also Published As
Publication number | Publication date |
---|---|
JP2603649B2 (en) | 1997-04-23 |
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