JPS6411203A - Lighting device - Google Patents

Lighting device

Info

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
Application number
JP62166522A
Other languages
Japanese (ja)
Other versions
JP2540549B2 (en
Inventor
Isamu Kaneko
Hideaki Kato
Toshiaki Sugimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
I Pex Inc
Original Assignee
Dai Ichi Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dai Ichi Seiko Co Ltd filed Critical Dai Ichi Seiko Co Ltd
Priority to JP62166522A priority Critical patent/JP2540549B2/en
Publication of JPS6411203A publication Critical patent/JPS6411203A/en
Application granted granted Critical
Publication of JP2540549B2 publication Critical patent/JP2540549B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (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.
JP62166522A 1987-07-03 1987-07-03 Lighting equipment Expired - Lifetime JP2540549B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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