JPH02160280A - 光源を備える受動的表示装置を均一照度に照明する装置 - Google Patents

光源を備える受動的表示装置を均一照度に照明する装置

Info

Publication number
JPH02160280A
JPH02160280A JP1120579A JP12057989A JPH02160280A JP H02160280 A JPH02160280 A JP H02160280A JP 1120579 A JP1120579 A JP 1120579A JP 12057989 A JP12057989 A JP 12057989A JP H02160280 A JPH02160280 A JP H02160280A
Authority
JP
Japan
Prior art keywords
sheet
lamp
proportioned
cosine
light source
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
Application number
JP1120579A
Other languages
English (en)
Inventor
Peter Knoll
ペーター・クノル
Winfried Koenig
ヴインフリート・ケーニツヒ
Wolfgang Ziegler
ヴオルフガング・ツイークラー
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE3145127A external-priority patent/DE3145127C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JPH02160280A publication Critical patent/JPH02160280A/ja
Pending 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
    • 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
    • G02F1/133604—Direct backlight with lamps

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は特許請求の範囲の上位概念記載の装置から出発
する。米国特許第４　２０６　５０１号明細書により背
後から照明する表示装置が公知であり、その際光源と表
示器の間に表示器を均一に照明するため位置に応じて黒
化した拡散板が配置される。高い照度のゾーンは低い照
度のゾーンより強く遮光される。拡散板は高いまたは低
い密度で分布した点を有するシートとして写真法により
製造される。
本発明の目的は写真法によらないシートの製法を得るこ
とである。
特許請求の範囲による本発明の装置はランプの位置でも
っとも密であり、シートの周縁へ向って大きい間隔で配
置した円をシートに配置するのが有利である。
円゛を線幅と線間隔の比がランプと表面の間の角度のコ
サイン、の３乗に比例するように配置するのがとくに有
利である。この手段によってシートは簡単に計算によっ
て製造することができる。
この方法はとくに表示装置を点光源で照明する場合有利
に使用される。
特許請求の範囲記載の装置はとくにフィルムの正しいグ
ランデージョンを調節する問題が避けられる利点を有す
る。
次に本発明の実施例を図面により説明する。
第１図は受動的表示装置の例として液晶（ＬＣ）表示器
の詳細を示す。ＬＣ表示器は偏光子１１、ガラス板１２
、液晶１３、もう１つのガラス板１４および偏光子−ト
ランスフレフタ組合せ１５を有する。このＬＣ表示器は
公知法で製造される。
ＬＣ表示器の後方にシー１−１６およびランプ１８が配
置される。シート１６上にラスタ点１７が認められる。
さらにランプ１８からラスタ点１７への照明角度が示さ
れる。円形リングを有するラスタシート１６の実施例が
第２図に示される。すなわち表示器は１つの点光源のみ
で照明され、場合により存在する第１図には示されない
導体路および構成素子は支持板の上に均一に分布し、局
部的透過光線はシート１６の裏面の照度に比例するので
、この光源は照明角度のコサインの３乗に比例する。光
線分布はその際回転対称である。線幅と線間隔の比が照
明角度のコサインの３乗に比例して増大する円形線フィ
ルタによって、透過する平均光線したがって表示器の局
部的照度は均一な高さに低下されるので、均一照度の照
明が行われる。表示器とランプ１８の間に均一に分布す
る構成素子が存在する場合、円の相互間隔は実験的に求
められる。この方法によればフィルムの露光を介する常
用の迂回はもはや不用である。円の間隔は１部理論的に
計算され、ラスタシート１６へＩ；だちにプリントする
ことができる。
【図面の簡単な説明】
第１図はＬＣ表示器の１部縦断面図、第２図はラスタシ
ートの実施例を示す平面図である。

Claims (1)

    【特許請求の範囲】
  1. 受動的表示器の後方に配置された光源を備え、シートが
    表示器と光源（１８）の間に配置され、このシートが照
    度の高いゾーンを照度の低いゾーンより強く遮光する、
    受動的表示装置を均一照度に照明する装置において、シ
    ート（１６）上に同心円を配置し、この円がランプの位
    置でもっともち密であり、シート（１６）の周縁方向に
    大きい間隔で配置され、円の線幅と線間隔の比がランプ
    と表面の間の角度のコサインの３乗に比例するように円
    が配置されていることを特徴とする光源を備える受動的
    表示装置を均一照度に照明する装置。
JP1120579A 1981-03-13 1989-05-16 光源を備える受動的表示装置を均一照度に照明する装置 Pending JPH02160280A (ja)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3109643 1981-03-13
DE3109643.3 1981-03-13
DE3145127.6 1981-11-13
DE3145127A DE3145127C3 (de) 1981-03-13 1981-11-13 Verfahren zur Herstellung einer Folie für eine Vorrichtung zur gradientenfreien Ausleuchtung von passiven Anzeigevorrichtungen

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP3818582A Division JPS57165887A (en) 1981-03-13 1982-03-12 Apparatus for gradient-free lighting of passive display unit equipped with light source and method of making same

Publications (1)

Publication Number Publication Date
JPH02160280A true JPH02160280A (ja) 1990-06-20

Family

ID=25791773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1120579A Pending JPH02160280A (ja) 1981-03-13 1989-05-16 光源を備える受動的表示装置を均一照度に照明する装置

Country Status (3)

Country Link
US (1) US4502761A (ja)
JP (1) JPH02160280A (ja)
GB (1) GB2094996B (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314631A1 (de) * 1983-04-22 1984-10-25 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur ausleuchtung passiver fluessigkristallanzeigen
JPS6229003A (ja) * 1985-07-30 1987-02-07 株式会社トキメック 背面反射式光拡散装置
JPS6240151A (ja) * 1985-08-14 1987-02-21 Hitachi Ltd 蛍光ランプ
JPS62125329A (ja) * 1985-11-27 1987-06-06 Hosiden Electronics Co Ltd 透過形表示装置
GB8600021D0 (en) * 1986-01-02 1986-02-12 Rca Corp Light box
DE3634900A1 (de) * 1986-10-14 1988-04-21 Andre Kulbach Werbetrommel
FR2625588B1 (fr) * 1987-12-30 1993-02-19 Matra Dispositif d'affichage modulaire a cristaux liquides
GB2240420B (en) * 1989-12-21 1993-09-08 Hi Lite Signs Ltd An illuminated sign.
GB9021444D0 (en) * 1990-10-02 1990-11-14 Delco Electronic Overseas Corp Light mask
IT221756Z2 (it) * 1991-03-22 1994-10-20 Gallone Cesare Dispositivo a display luminosi per apparecchiature elettriche
GB2267378B (en) * 1992-05-22 1996-07-10 Nokia Mobile Phones Uk Illuminated LCD apparatus
USD491687S1 (en) 2003-06-18 2004-06-15 Focal Point, Llc Housing and cap portion of a light fixture
USD497217S1 (en) 2003-06-18 2004-10-12 Focal Point, L.L.C. Light fixture
USD495085S1 (en) 2003-06-18 2004-08-24 Focal Point, L.L.C. Housing and cap portion of a light fixture
WO2006098799A2 (en) * 2005-03-12 2006-09-21 3M Innovative Properties Company Illumination devices and methods for making the same
US8525402B2 (en) 2006-09-11 2013-09-03 3M Innovative Properties Company Illumination devices and methods for making the same
US8581393B2 (en) * 2006-09-21 2013-11-12 3M Innovative Properties Company Thermally conductive LED assembly
US20080295327A1 (en) * 2007-06-01 2008-12-04 3M Innovative Properties Company Flexible circuit
US10528694B2 (en) * 2016-09-01 2020-01-07 Joebotics Incorporated Breadboard and electronics experimentation system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384578A (en) * 1943-03-10 1945-09-11 Bausch & Lomb Optical element
US3571489A (en) * 1966-12-23 1971-03-16 Max Levy & Co Inc Transparent substrate having graded optical density conductors thereon
US3561963A (en) * 1967-09-11 1971-02-09 Signetics Corp Transparent mask and method for making the same
US3645734A (en) * 1969-12-22 1972-02-29 Toppan Printing Co Ltd Process of manufacturing a master dot pattern for photoetching a graded-hole shadow mask
US3912510A (en) * 1973-10-23 1975-10-14 Xerox Corp Electrophotographic process employing a compound document screen
US3957351A (en) * 1974-09-16 1976-05-18 Rockwell International Corporation Backlighted display apparatus
US4206501A (en) * 1978-06-12 1980-06-03 Motorola, Inc. Apparatus and methods for back illuminating a display surface
US4383016A (en) * 1981-09-25 1983-05-10 Ppg Industries, Inc. Method for repairing glass photomasks

Also Published As

Publication number Publication date
US4502761A (en) 1985-03-05
GB2094996B (en) 1985-04-24
GB2094996A (en) 1982-09-22

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