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FR2642209B1 - LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN - Google Patents

LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN

Info

Publication number
FR2642209B1
FR2642209B1 FR8900791A FR8900791A FR2642209B1 FR 2642209 B1 FR2642209 B1 FR 2642209B1 FR 8900791 A FR8900791 A FR 8900791A FR 8900791 A FR8900791 A FR 8900791A FR 2642209 B1 FR2642209 B1 FR 2642209B1
Authority
FR
France
Prior art keywords
liquid crystal
lighting device
crystal screen
screen
lighting
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.)
Expired - Fee Related
Application number
FR8900791A
Other languages
French (fr)
Other versions
FR2642209A1 (en
Inventor
Guido Guerri Dall Oro
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.)
LOIRE ELECTRONIQUE
Original Assignee
LOIRE ELECTRONIQUE
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 LOIRE ELECTRONIQUE filed Critical LOIRE ELECTRONIQUE
Priority to FR8900791A priority Critical patent/FR2642209B1/en
Publication of FR2642209A1 publication Critical patent/FR2642209A1/en
Application granted granted Critical
Publication of FR2642209B1 publication Critical patent/FR2642209B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
FR8900791A 1989-01-24 1989-01-24 LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN Expired - Fee Related FR2642209B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8900791A FR2642209B1 (en) 1989-01-24 1989-01-24 LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8900791A FR2642209B1 (en) 1989-01-24 1989-01-24 LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN

Publications (2)

Publication Number Publication Date
FR2642209A1 FR2642209A1 (en) 1990-07-27
FR2642209B1 true FR2642209B1 (en) 1994-07-01

Family

ID=9378003

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8900791A Expired - Fee Related FR2642209B1 (en) 1989-01-24 1989-01-24 LIGHTING DEVICE FOR LIQUID CRYSTAL SCREEN

Country Status (1)

Country Link
FR (1) FR2642209B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387953A (en) * 1990-12-27 1995-02-07 Canon Kabushiki Kaisha Polarization illumination device and projector having the same
JPH06102414A (en) * 1991-06-27 1994-04-15 Nitsusen Kagaku Kk Light guide plate and surface lighting fitting
US5698941A (en) * 1996-01-16 1997-12-16 Motorola Optical correction layer for a light emitting apparatus
EP1267199A1 (en) * 2001-06-15 2002-12-18 Prokia Technology Co., Ltd. Illuminating module using an omnidirectional light source for a display apparatus
US6626562B2 (en) 2001-10-08 2003-09-30 Randall D. Blanchard Low profile backlight optimized for liquid crystal displays
JP5989305B2 (en) 2011-01-14 2016-09-07 エルジー イノテック カンパニー リミテッド Backlight unit and display device using the same
KR102665030B1 (en) * 2019-07-22 2024-05-13 삼성전자주식회사 Display apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171874A (en) * 1975-02-03 1979-10-23 General Electric Company Evenly illuminated display devices
JPS612685U (en) * 1984-06-12 1986-01-09 株式会社 ワコム lcd panel display
AU569404B2 (en) * 1984-07-16 1988-01-28 Hughes Aircraft Company Illumination system reflector
FR2583198B1 (en) * 1985-06-05 1988-02-05 Jaeger IMPROVED INTERCONNECTION DEVICE FOR FLAT SCREEN TYPE STATIC DISPLAY DEVICE, MANUFACTURING METHOD AND LIGHT BOX INCORPORATING THE SAME
CA1299157C (en) * 1986-12-19 1992-04-21 Akira Tanaka Illuminating apparatus

Also Published As

Publication number Publication date
FR2642209A1 (en) 1990-07-27

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Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
ST Notification of lapse

Effective date: 20060929