JPS6411203A - Lighting device - Google Patents
Lighting deviceInfo
- Publication number
- JPS6411203A JPS6411203A JP62166522A JP16652287A JPS6411203A JP S6411203 A JPS6411203 A JP S6411203A JP 62166522 A JP62166522 A JP 62166522A JP 16652287 A JP16652287 A JP 16652287A JP S6411203 A JPS6411203 A JP S6411203A
- Authority
- JP
- Japan
- Prior art keywords
- linear light
- light sources
- light source
- fresnel surface
- groove wall
- 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
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
PURPOSE:To obtain a uniform brightness distribution as a plane light source by constituting a light device so that respective groove wall surfaces of a Fresnel surface facing the linear light source side increases in inclination gradually away from the linear light source. CONSTITUTION:Couples of linear light sources 1 and photoconductors 2 are arranged at right and left symmetrical positions and the Fresnel surface 2b of the photoconductor 2 is so constituted that its respective groove wall surfaces increase in inclination gradually away from the linear light sources 1. Therefore, the incident angle of light on the respective groove wall surfaces of the Fresnel surface 2b from the linear light sources 1 decreases away from the linear light sources 1, so the spread of its reflected light decreases away from the linear light sources 1. Further, this operation even on light incident on the Fresnel surface 2b after being reflected totally by the top surfaces 2c of the photoconductors 2 temporarily is similar. Consequently, the uniform brightness distribution is obtained as the surface light source and the thickness is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62166522A JP2540549B2 (en) | 1987-07-03 | 1987-07-03 | Lighting equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62166522A JP2540549B2 (en) | 1987-07-03 | 1987-07-03 | Lighting equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6411203A true JPS6411203A (en) | 1989-01-13 |
JP2540549B2 JP2540549B2 (en) | 1996-10-02 |
Family
ID=15832876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62166522A Expired - Lifetime JP2540549B2 (en) | 1987-07-03 | 1987-07-03 | Lighting equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2540549B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0477101U (en) * | 1990-11-16 | 1992-07-06 | ||
US5339179A (en) * | 1992-10-01 | 1994-08-16 | International Business Machines Corp. | Edge-lit transflective non-emissive display with angled interface means on both sides of light conducting panel |
JPH11176223A (en) * | 1997-12-05 | 1999-07-02 | Enplas Corp | Edge-emitting light source apparatus and liquid crystal display apparatus |
US6072551A (en) * | 1996-02-14 | 2000-06-06 | Physical Optics Corporation | Backlight apparatus for illuminating a display with controlled light output characteristics |
US6130730A (en) * | 1996-02-14 | 2000-10-10 | Physical Optics Corporation | Backlight assembly for a display |
US6351594B1 (en) * | 1997-03-04 | 2002-02-26 | Matsushita Electric Industrial Co., Ltd. | Linear beam irradiator having a varying cross-sectional size |
JP2003141922A (en) * | 2001-10-31 | 2003-05-16 | Asahi Techno Kk | Plane luminous device |
JP2008262757A (en) * | 2007-04-10 | 2008-10-30 | Nidec Copal Corp | Surface light emitting device |
JP2010149775A (en) * | 2008-12-26 | 2010-07-08 | Mitsuba Corp | Vehicular lamp |
DE102022210655A1 (en) | 2022-10-10 | 2024-04-11 | Volkswagen Aktiengesellschaft | Lighting element for vehicles |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6134583A (en) * | 1984-07-26 | 1986-02-18 | シャープ株式会社 | Lighting apparatus |
JPS6273206A (en) * | 1985-09-27 | 1987-04-03 | Hitachi Ltd | Photoconductive plate |
JPS62284305A (en) * | 1986-06-03 | 1987-12-10 | Alps Electric Co Ltd | Back light leading body |
-
1987
- 1987-07-03 JP JP62166522A patent/JP2540549B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6134583A (en) * | 1984-07-26 | 1986-02-18 | シャープ株式会社 | Lighting apparatus |
JPS6273206A (en) * | 1985-09-27 | 1987-04-03 | Hitachi Ltd | Photoconductive plate |
JPS62284305A (en) * | 1986-06-03 | 1987-12-10 | Alps Electric Co Ltd | Back light leading body |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0477101U (en) * | 1990-11-16 | 1992-07-06 | ||
US5339179A (en) * | 1992-10-01 | 1994-08-16 | International Business Machines Corp. | Edge-lit transflective non-emissive display with angled interface means on both sides of light conducting panel |
US6072551A (en) * | 1996-02-14 | 2000-06-06 | Physical Optics Corporation | Backlight apparatus for illuminating a display with controlled light output characteristics |
US6130730A (en) * | 1996-02-14 | 2000-10-10 | Physical Optics Corporation | Backlight assembly for a display |
US6351594B1 (en) * | 1997-03-04 | 2002-02-26 | Matsushita Electric Industrial Co., Ltd. | Linear beam irradiator having a varying cross-sectional size |
JPH11176223A (en) * | 1997-12-05 | 1999-07-02 | Enplas Corp | Edge-emitting light source apparatus and liquid crystal display apparatus |
JP2003141922A (en) * | 2001-10-31 | 2003-05-16 | Asahi Techno Kk | Plane luminous device |
JP2008262757A (en) * | 2007-04-10 | 2008-10-30 | Nidec Copal Corp | Surface light emitting device |
JP2010149775A (en) * | 2008-12-26 | 2010-07-08 | Mitsuba Corp | Vehicular lamp |
DE102022210655A1 (en) | 2022-10-10 | 2024-04-11 | Volkswagen Aktiengesellschaft | Lighting element for vehicles |
Also Published As
Publication number | Publication date |
---|---|
JP2540549B2 (en) | 1996-10-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |