JPS5937530A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS5937530A
JPS5937530A JP57147666A JP14766682A JPS5937530A JP S5937530 A JPS5937530 A JP S5937530A JP 57147666 A JP57147666 A JP 57147666A JP 14766682 A JP14766682 A JP 14766682A JP S5937530 A JPS5937530 A JP S5937530A
Authority
JP
Japan
Prior art keywords
light
liquid crystal
crystal display
electrode
display
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
JP57147666A
Other languages
Japanese (ja)
Inventor
Kiyoshige Kinugawa
清重 衣川
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57147666A priority Critical patent/JPS5937530A/en
Publication of JPS5937530A publication Critical patent/JPS5937530A/en
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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133612—Electrical details
    • 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
    • G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night

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)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE:To provide both display functions of a reflection type and transmission type having brightness and high contrast, by providing an electroluminescence light emitting element interposed with a light transmittable luminous body layer between a light transmittable electrode and a light reflective metallic electrode on the outside surface of the lower transparent electrode of a liquid crystal display element. CONSTITUTION:A TN liquid crystal 7 is sealed between upper and lower transparent substrates 1, 2 provided with transparent electrodes 3, 4, and an electroluminescence element 25 is provided on the outside surface of the lower polarization plate 10 of a display element provided upper and lower polarization plates 9, 10. Since the element 25 is constituted by providing a luminous body layer 24 between the light transmittable electrode 22 and light reflective metallic electrode 23 between light transmittable substrates 20 and 21, the layer 24 emits light when a switch 27 is turned on, thus providing a transmission type display in a dark place. The switch 27 is turned off in a bright place, by which a reflection type display is obtd. Thus equal polarizing and light reflection characteristics are obtd. in both displays of the transmission type and reflection type and the display having brightness and good contrast is obtd.

Description

【発明の詳細な説明】 本発明は液晶表示装置、特に反射形と透過形との画表示
機能を高コントラストで実現可能にした液晶表示素子に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display element that can realize both reflective and transmissive image display functions with high contrast.

一般に液晶表示装置は、第１図に要部断面構成図で示す
ように透光性ガラス仮からなる上、下基板１．？の対向
面にそれぞれ透明導電膜からなるト、下電極３，４をＶ
１着形成し、該ト、−ド基板１゜２相互間を所定距１ｔ
ｌ［を離間してその周辺部をスペーサを含有させたシー
ル材５で封着して外囲器６を構成１〜、該外囲器６の中
にＴＮ液晶Ｉを封入して液晶表示゛伏子８が構成されて
いる。また、この液晶表示素子８の外布、つまり基板１
，２の外面には］０互に１目元角が９０°異なるＥ、下
漬光（反９，１０が配設され、さらに下幅元板１０の外
面側にはＡｔ板からなる光反射板１１が配設されて構成
されている。In general, a liquid crystal display device consists of upper and lower substrates 1, 2 and 3 made of transparent glass, as shown in FIG. ? The lower electrodes 3 and 4 are each made of a transparent conductive film on the opposing surfaces of the V
A predetermined distance of 1t is formed between the two substrates 1゜2.
The envelope 6 is constructed by separating the TN liquid crystal I and sealing the peripheral portion thereof with a sealing material 5 containing a spacer. Fushiko 8 is configured. In addition, the outer cloth of this liquid crystal display element 8, that is, the substrate 1
, 2 are provided with E and lower dipping lights (reverses 9 and 10) each having an eye angle of 90 degrees, and a light reflecting plate made of an At plate is further provided on the outer surface of the lower width base plate 10. 11 are arranged and constituted.

このように構成された液晶表示素子は、液晶表示水子８
０ヒ、下電極３，４間に電圧を印ｌＪｎすることによっ
て、ＴＮ液晶γの光学的性質を変化させ、この変化を七
反射板１１で反射させて下基板１側から認識することが
できる。The liquid crystal display element configured in this way is the liquid crystal display element 8.
By applying a voltage between the lower electrodes 3 and 4, the optical properties of the TN liquid crystal γ are changed, and this change is reflected by the reflector 11 and can be recognized from the lower substrate 1 side. .

また、前述したような液晶表示装置ａを透過形ｔ？よび
反射形として共用する場合、第２図に要部断面構成図で
示すようにヒ、下基板１．２の対向面にそれぞれ上、下
電極３，４を形成し、ＴＮ液晶Ｔを封入して構成された
液晶表示素子８の外面に上、下偏光板９，１０を配設し
、該下開光阪１０の外面に半透過性を有する）＼−フミ
ラ＝からなる半透過膜１２を配設し、さらにこの半透；
１４膜１２の外面に光源１３を配設して構成し、明るい
場所でけ液晶表示素子８．聞元板９　、１０２よび半透
過膜１２を用いた反射形で使１月し、暗い場所ではｌ成
品表示素子８．偏光板９，１０．半透過膜１２Ｆ？よび
光源１３を用いだ透過形として使用していた。Furthermore, the above-mentioned liquid crystal display device a may be of a transmission type t? When used as both a reflective type and a reflective type, upper and lower electrodes 3 and 4 are respectively formed on the opposing surfaces of the lower substrate 1.2, and a TN liquid crystal T is sealed therein, as shown in the cross-sectional diagram of main parts in FIG. Upper and lower polarizing plates 9 and 10 are disposed on the outer surface of the liquid crystal display element 8, and a semi-transparent film 12 made of ＼-Fumira= is disposed on the outer surface of the lower polarizing plate 10. In addition, this semi-transparent;
The light source 13 is disposed on the outer surface of the 14 film 12, and the liquid crystal display element 8. A reflective type using the display plates 9, 102 and a semi-transparent film 12 is used for a month, and in a dark place the product display element 8. Polarizing plates 9, 10. Semi-transparent membrane 12F? The light source 13 was used as a transmission type.

しかしながら、前記構成による液晶表示装置にち・いて
、半透過膜１２（−ｔ、、一部の光を透１１塁し、一部
の光を反射する機能を有しているため、毘の利用率が悪
く、反射彩、透過形ともに表示品質が低ドするという問
題があった。特に光源１３として薄形溝；青という特続
をＨしかつボータプルタイプに好適なエレクトロルミネ
ッセンス光源を用いた場合、この光源自体が暗いた、１
ｂ１特に透過形では表示品質が著しく低下するという欠
点があった。However, since the liquid crystal display device with the above structure has the function of transmitting some light and reflecting some light, the semi-transparent film 12 (-t) There was a problem in that the display quality was poor in both the reflective color and the transmission type.In particular, as the light source 13, a thin groove; a special feature of blue was used, and an electroluminescent light source suitable for the double type was used. If this light source itself is dark, 1
b1 Particularly in the transmission type, there was a drawback that the display quality was significantly degraded.

また、エレクトロルミネッセンス素子は電圧を印加しな
いときけ白色に近い色のため、エレクトロルミネッセン
ス板自体を反射板として用いる方法もあるが、材質が誘
電体のため、反射光の偏光性が乱さル、反射形として使
用したとき、表示品質が低下するという欠点がちった。In addition, since electroluminescent elements have a color close to white when no voltage is applied, there is a method of using the electroluminescent plate itself as a reflector, but since the material is dielectric, the polarization of the reflected light is disturbed and the reflection When used as a form, the display quality often deteriorates.

したがって本発明は、前述した従来の欠点に鑑みてなさ
れたものであり、・その目的とするところは、液晶表示
素子の外面に、透光１生′逍極と光反射能を「する魚−
電極との間に透光性発光体ｒ−をサンドイッチ状に挟持
させて構成したエレクトロルミ不ツ七ンス発′ｌｔ、素
子を配設することによって、透過形２反射形ともに表示
品質を向上させた液晶表示装置１ｆｆｉを提供すること
にある。Therefore, the present invention has been made in view of the above-mentioned drawbacks of the conventional art, and its purpose is to provide a liquid crystal display device with a "fish-like structure" that imparts light-transmitting properties and light-reflecting properties to the outer surface of a liquid crystal display element.
The display quality of both the transmissive and reflective types can be improved by arranging an electroluminescence device consisting of a translucent luminous material sandwiched between the electrodes. An object of the present invention is to provide a liquid crystal display device 1ffi.

以下図面を用いて本発明の実施例を詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.

第３図は本発明による液晶表示装置・Ｄ−例を示す要部
断面構成図であり、前述の図と同記号は同一要素となる
のでその説明は省略する。同図において、液晶表示素子
８の外面にはそれｅれ一ト、下偏光板９．１０が接着配
置され、さらに下偏光板１０の外面には、透光性ガラス
板からなる一対の透光１生基板２０．２１対向面にそれ
ぞれ透明導電膜からなる透光性′Ｍ、極２２およびＡ１
蒸着膜からなる光反射性を有する金属電極２３が形成さ
れ、この両電極２２．２３間に透光性の発光体からなる
発光体層２４をサンドイッチ状に挾持させて構成された
エレクトロルミネッセンス発光素子２５が密着配置され
ている。この場合、とのエレクトロルミネッセンス発光
素子２５は、透光性電極２２側の鳩板２０の外面が下偏
光板１０に密着するように配設されている。FIG. 3 is a cross-sectional view of a main part of a liquid crystal display device according to the present invention, Example D. Since the same symbols as those in the previous drawings represent the same elements, the explanation thereof will be omitted. In the figure, lower polarizing plates 9 and 10 are bonded to each other on the outer surface of the liquid crystal display element 8, and a pair of light-transmitting glass plates made of light-transmitting glass plates are disposed on the outer surface of the lower polarizing plate 10. Translucent 'M', pole 22 and A1 each made of a transparent conductive film on the opposite surface of the first raw substrate 20.21.
An electroluminescent light-emitting element in which a light-reflecting metal electrode 23 made of a vapor-deposited film is formed, and a light-emitting layer 24 made of a light-transmitting light-emitting material is sandwiched between both electrodes 22 and 23. 25 are arranged in close contact with each other. In this case, the electroluminescent light emitting element 25 is arranged such that the outer surface of the pigeon plate 20 on the transparent electrode 22 side is in close contact with the lower polarizing plate 10.

このように構成された液晶表示装置において、反射形で
使用する場合、エレクトロルミネッセンス発光素子２５
の透毘性′１１！極２２および発光体層２４は透光性で
あるため、上偏光板９の前面側から入射した光は液晶表
示素子８．下偏光板１０を透過してエレクトロルミネッ
センス発光素子２５に入射し、背面側のＡ１金属′を極
２３で前記前面方向に拡散的に反射される。したがって
、光の偏光］生は失なわれることがなく、良好な反射率
が得られる。また、光路中に前述したような半透過板な
いしはそれらにａ当する部材かび在しないため、光の（
Ｒ失は全くなくなる。一方、透過形で使用する場合は、
同図に示すように透光性電極２２とＡｆ金属電極２３と
の間に、電源２６とこの電源電圧をオ／、オフするコン
トロールスイッチ２７とをＦｔｉ列接続してこのスイッ
チ２７をオンにすることによって、エレクトロルミネッ
センス発光素子２５の発光体層２４を発光させてＡ！金
金運電極２３前面方向に反射させることができるので、
光源としても十分な光縫が得られる。また、前述と同様
に光路中に半透過板がないため、光の損失がなく、良好
な表示が得られる。In the liquid crystal display device configured in this way, when used in a reflective type, the electroluminescent light emitting element 25
Transparency '11! Since the pole 22 and the light emitter layer 24 are translucent, the light incident from the front side of the upper polarizing plate 9 is transmitted to the liquid crystal display element 8. The light passes through the lower polarizing plate 10 and enters the electroluminescent light emitting element 25, and is diffusely reflected by the A1 metal' on the back side toward the front side at the pole 23. Therefore, the polarization of the light is not lost, and good reflectance can be obtained. In addition, since there is no semi-transparent plate or a member corresponding thereto in the optical path, the light (
R loss is completely eliminated. On the other hand, when using the transparent type,
As shown in the figure, a power supply 26 and a control switch 27 for turning on/off the power supply voltage are connected in Fti rows between the transparent electrode 22 and the Af metal electrode 23, and the switch 27 is turned on. By this, the light emitter layer 24 of the electroluminescent light emitting element 25 is caused to emit light A! Since it can be reflected in the front direction of the money luck electrode 23,
Sufficient light stitching can also be obtained as a light source. Further, as described above, since there is no semi-transparent plate in the optical path, there is no loss of light and a good display can be obtained.

なお、前記実施例において、エレクトロルミネッセンス
発光素子２５は、２枚の透光性基板２０゜２１対向而に
それぞれ透光性電極２２と金ＦＡ電極２３を形成し、こ
れらの両者間に透光性の発光体層２４を介在させて構成
した場合について説明したが、本発明はこの構造に限定
されるものではなく、透光性電極２２と金属電極２３と
の間に発光体１１２４を介在さ亡て構成したエレクトロ
ルミネッセンス発光素子を、液晶表示素子８の外面−ま
たは下偏光板１０の外面に、接着、押し付けまたは一体
購成などの手段により設けても前述と全く同様の効果が
得られることは明らかである。In the embodiment described above, the electroluminescent light emitting element 25 has a transparent electrode 22 and a gold FA electrode 23 formed on two transparent substrates 20 and 21, respectively, and a transparent electrode 23 between them. Although a case has been described in which the light emitting layer 24 is interposed between the light emitting layer 24, the present invention is not limited to this structure. Even if an electroluminescent light-emitting element constructed by the above-mentioned structure is provided on the outer surface of the liquid crystal display element 8 or the outer surface of the lower polarizing plate 10 by means of adhesion, pressing, or integral purchase, the same effect as described above can be obtained. it is obvious.

以Ｉ：説明したように本発明による液晶表示装置によれ
ば、液晶表示素子の外面に、透光性電極と光反射性金目
電極との間に透）ＩＩ：性発光体Ｉコを介在させ、ｔエ
レクトロルミネッセンス発光判子を設けたことによって
、透＠形、および反射形の使用にｒ４してほぼ同等の偏
光性、光反射性が得られるので、Ｉ（示品質が大幅に向
１−できるという極めて優れた効檗が得られる。As described above, according to the liquid crystal display device of the present invention, a transparent luminescent material I is interposed between the light-transmitting electrode and the light-reflecting metal electrode on the outer surface of the liquid crystal display element. By providing an electroluminescent stamp, it is possible to obtain almost the same polarization and light reflectivity as when using transparent @ type and reflective type. An extremely excellent effect can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図は従来の液晶表示装置の一例を示す要部
断面構成図、・■３図は本発明による液晶表示装置の一
例を示す要部断面構成図である。 １・Φ・・上基板、２・・・中下基板、３・・争・上電
極、４・・・・下電極、５＠・拳・シール材、６・・・
・外囲器、７・・・・ＴＮ液晶、８・・・・液晶表示素
子、９・・・・ト偏元板、１０・・・・下調先板、１１
・・・・光反射板、１２・・・・半透過１摸、１３・・
・・光源、２０゜２１・・・・透光性基板、２２・・・
・透光性電極、２３・・・・金属電極、２４・・・・発
光体層、２５・・・・エレクトロルミネッセンス発光判
子、２６・・・・電源、２Ｔ・・・・スイッチ。1 and 2 are cross-sectional configuration diagrams of essential parts showing an example of a conventional liquid crystal display device, and FIG. 3 is a cross-sectional configuration diagram of essential parts showing an example of a liquid crystal display device according to the present invention. 1. Φ Upper substrate, 2. Middle and lower substrate, 3. Upper electrode, 4. Lower electrode, 5@. Fist, sealing material, 6.
-Envelope, 7...TN liquid crystal, 8...Liquid crystal display element, 9...T polarizing plate, 10...Lower adjustment plate, 11
...Light reflecting plate, 12...Semi-transparent 1 copy, 13...
...Light source, 20°21...Transparent substrate, 22...
- Translucent electrode, 23...metal electrode, 24...luminescent layer, 25...electroluminescence stamp, 26...power supply, 2T...switch.

Claims (1)

【特許請求の範囲】[Claims] 対向面に表示パターンに対応して透明電極が被着形成さ
れた透光性基板間に液晶を封入してなる液晶表示素子の
外面に、透光性電極と光反射性金属電極との間に透光性
発光体層を介在させたエレクトロルミネッセンス発光素
子を配設したことを特徴とした液晶表示装置。A liquid crystal display element is formed by sealing liquid crystal between transparent substrates on which transparent electrodes are adhered in accordance with the display pattern on the opposing surface, and between a transparent electrode and a light-reflective metal electrode. A liquid crystal display device characterized by disposing an electroluminescent light emitting element with a translucent light emitting layer interposed therebetween.
JP57147666A 1982-08-27 1982-08-27 Liquid crystal display device Pending JPS5937530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57147666A JPS5937530A (en) 1982-08-27 1982-08-27 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57147666A JPS5937530A (en) 1982-08-27 1982-08-27 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPS5937530A true JPS5937530A (en) 1984-03-01

Family

ID=15435521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57147666A Pending JPS5937530A (en) 1982-08-27 1982-08-27 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS5937530A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238623U (en) * 1985-08-27 1987-03-07
JPS6238624U (en) * 1985-08-27 1987-03-07
JPS6263780U (en) * 1985-10-12 1987-04-20
JPS62116227U (en) * 1986-01-13 1987-07-23
US5121234A (en) * 1990-10-29 1992-06-09 Honeywell Incorporated Dichroic liquid crystal display with integral electroluminescent backlighting
JPH07301799A (en) * 1994-05-10 1995-11-14 Seikosha Co Ltd El for back light of liquid crystal
WO1997038347A1 (en) * 1996-04-10 1997-10-16 Cambridge Display Technology Limited Efficient backlighting for lcds
US5703666A (en) * 1991-08-29 1997-12-30 Canon Kabushiki Kaisha Electroluminescent device for illuminating a liquid crystal display
GB2314665A (en) * 1996-04-10 1998-01-07 Cambridge Display Tech Ltd Efficient backlighting for lcds
JPH10111507A (en) * 1996-10-04 1998-04-28 Nippon Synthetic Chem Ind Co Ltd:The Liquid crystal display device
EP1046944A2 (en) * 1999-04-13 2000-10-25 Mannesmann VDO Aktiengesellschaft Self illuminating LCD device
EP1785765A1 (en) * 2005-11-15 2007-05-16 Samsung Electronics Co., Ltd. Display device emitting light from both sides

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238624U (en) * 1985-08-27 1987-03-07
JPS6238623U (en) * 1985-08-27 1987-03-07
JPS6263780U (en) * 1985-10-12 1987-04-20
JPS62116227U (en) * 1986-01-13 1987-07-23
US5121234A (en) * 1990-10-29 1992-06-09 Honeywell Incorporated Dichroic liquid crystal display with integral electroluminescent backlighting
US5703666A (en) * 1991-08-29 1997-12-30 Canon Kabushiki Kaisha Electroluminescent device for illuminating a liquid crystal display
JPH07301799A (en) * 1994-05-10 1995-11-14 Seikosha Co Ltd El for back light of liquid crystal
WO1997038347A1 (en) * 1996-04-10 1997-10-16 Cambridge Display Technology Limited Efficient backlighting for lcds
GB2314665A (en) * 1996-04-10 1998-01-07 Cambridge Display Tech Ltd Efficient backlighting for lcds
GB2314665B (en) * 1996-04-10 2000-05-17 Cambridge Display Tech Ltd Efficient backlighting for lcds
JPH10111507A (en) * 1996-10-04 1998-04-28 Nippon Synthetic Chem Ind Co Ltd:The Liquid crystal display device
EP1046944A2 (en) * 1999-04-13 2000-10-25 Mannesmann VDO Aktiengesellschaft Self illuminating LCD device
EP1046944A3 (en) * 1999-04-13 2001-09-12 Mannesmann VDO Aktiengesellschaft Self illuminating LCD device
US6542145B1 (en) 1999-04-13 2003-04-01 Mannesmann Vdo Ag Self-illuminating LCD display device
EP1785765A1 (en) * 2005-11-15 2007-05-16 Samsung Electronics Co., Ltd. Display device emitting light from both sides

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