JPH1145058A - Display device - Google Patents
Display deviceInfo
- Publication number
- JPH1145058A JPH1145058A JP9200639A JP20063997A JPH1145058A JP H1145058 A JPH1145058 A JP H1145058A JP 9200639 A JP9200639 A JP 9200639A JP 20063997 A JP20063997 A JP 20063997A JP H1145058 A JPH1145058 A JP H1145058A
- Authority
- JP
- Japan
- Prior art keywords
- beam splitter
- display device
- light
- plate
- emitting layer
- 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.)
- Withdrawn
Links
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- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばラップトッ
プコンピュータ、テレビジョン、移動通信用のディスプ
レイ等に利用できる発光薄膜を用いた表示装置の構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a display device using a light-emitting thin film which can be used for, for example, a laptop computer, a television, a display for mobile communication, and the like.
【０００２】[0002]
【従来の技術】発光物質を2枚の電極で挟んだ構造を有
する表示装置としては、図３に示すようなＥＬ素子が良
く知られているが、大抵の発光物質は透明または白色等
の明るい色であり、背面の金属電極が見える場合もあ
り、ＯＦＦ状態で鏡面または明るい色を呈する。そのた
めＯＮ状態とのコントラストをとりにくく、極めて視認
性が低いものとなっていた。2. Description of the Related Art As a display device having a structure in which a light-emitting substance is sandwiched between two electrodes, an EL element as shown in FIG. 3 is well known, but most light-emitting substances are transparent or bright, such as white. It is a color, and the metal electrode on the back surface may be visible, and in the OFF state, it has a mirror surface or a bright color. Therefore, it is difficult to obtain a contrast with the ON state, and the visibility is extremely low.
【０００３】この課題を解決すべく、特開平８−１３８
８７０では、一方の電極が金属電極であることが望まし
いエレクトロルミネッセンス素子（以下、有機ＥＬ素子
という）において、光の出射方向と電界印加方向を直交
させ、直接金属電極面が見えないようにしてコントラス
トを向上している。また特開平８−０８３６８８では、
同様の有機ＥＬ装置において、表面にレンチキュラーレ
ンズアレイを配置して、鏡面感を緩和している。In order to solve this problem, Japanese Patent Application Laid-Open No. 8-138
In 870, in an electroluminescence element (hereinafter, referred to as an organic EL element) in which one of the electrodes is preferably a metal electrode, the light emission direction and the electric field application direction are made orthogonal to each other so that the metal electrode surface is not directly visible and the contrast is increased. Have improved. Also, in JP-A-8-08688,
In a similar organic EL device, a lenticular lens array is disposed on the surface to reduce the mirror feeling.
【０００４】[0004]
【発明が解決しようとする課題】発光物質を２枚の電極
で挟持した構造の表示装置においてコントラストを向上
させるための先の２つの技術において、前者では、この
ような構造で高精細なディスプレイを実現する事は難し
く、また後者においては鏡面感の改善はできてもコント
ラストの向上効果はほとんど期待できない。SUMMARY OF THE INVENTION In a display device having a structure in which a luminescent material is sandwiched between two electrodes, the former two technologies for improving the contrast, the former discloses a high-definition display having such a structure. It is difficult to realize, and in the latter, the effect of improving the contrast can hardly be expected even if the mirror feeling can be improved.
【０００５】本発明は、このような課題を解決して、極
めて簡単な構成で表示輝度とコントラストの高い発光型
表示装置を提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a light-emitting display device having a very simple structure and high display brightness and high contrast.
【０００６】[0006]
【課題を解決するための手段】本発明の表示装置は、対
向する電極間に発光層が挟持されてなり、前記一方の電
極は基板の一方の面に形成されてなり、前記基板の他方
の面には波長補正板、平面型直線偏光ビームスプリッ
タ、及び吸収型偏光板が形成されてなることを特徴とす
る。According to a display device of the present invention, a light emitting layer is sandwiched between opposing electrodes, the one electrode is formed on one surface of a substrate, and the other electrode is formed on the other surface of the substrate. A wavelength correction plate, a planar linear polarization beam splitter, and an absorption polarization plate are formed on the surface.
【０００７】この構成によれば、表示装置の表側から入
射した光の１偏光成分は効果的に表示装置表面の偏光板
により吸収され反射光を半分にできる。一方、発光層で
発生した光は、半分の偏光成分は偏光ビームスプリッタ
そして吸収型偏光板を通過して直接表に出射し、残りの
半分の偏光成分は偏光ビームスプリッタで反射され波長
補正板と裏側の金属電極で偏光方向を９０度捻じられて
再び偏光ビームスプリッタに入射して表側に出射する。
このため発光層で発生した光はすべて表側に出射できる
事になり、明るさを減ずる事はないのである。According to this configuration, one polarized light component of the light incident from the front side of the display device is effectively absorbed by the polarizing plate on the display device surface, and the reflected light can be halved. On the other hand, in the light generated in the light emitting layer, half of the polarized light component passes directly through the polarizing beam splitter and the absorption type polarizing plate and is emitted directly to the table, and the other half of the polarized light component is reflected by the polarizing beam splitter and passes through the wavelength correcting plate. The polarization direction is twisted by 90 degrees by the metal electrode on the back side, and the light is again incident on the polarization beam splitter and emitted to the front side.
For this reason, all the light generated in the light emitting layer can be emitted to the front side, and the brightness is not reduced.
【０００８】一方、先に述べたように外部光を半分以下
にできるためコントラストが向上し、明るいところでの
視認性の向上を実現できる。On the other hand, since the external light can be reduced to half or less as described above, the contrast is improved and the visibility in a bright place can be improved.
【０００９】また、前記偏光板と前記基板との間に前記
波長補正板及び前記偏光ビームスプリッターが形成され
てなることを特徴とする。基板上に、波長補正板が形成
される場合と、偏光ビームスプリッターが形成される場
合とがあるが、いずれの状態においても、発光した光を
全て外に出すことができるとともに、鏡面感を防止する
ことができる。The wavelength correction plate and the polarization beam splitter are formed between the polarizing plate and the substrate. There are cases where a wavelength correction plate is formed on the substrate and cases where a polarization beam splitter is formed.In either case, all emitted light can be emitted to the outside and the mirror feeling is prevented can do.
【００１０】このとき用いる平面型偏光ビームスプリッ
タとしてはコレステリック層を有する物質よりなるもの
や、複数の屈折率の異なる層の積層構造からなるもので
も用いることができる。要するに平面であり、かつ２つ
の互いに直交する２つの直線偏光、または回転方向が逆
の２つの円偏光に分離できるフィルムであればよい。As the planar polarizing beam splitter used at this time, one made of a substance having a cholesteric layer or one made of a laminated structure of a plurality of layers having different refractive indexes can be used. In short, any film may be used as long as it is a plane film and can be separated into two linearly polarized lights orthogonal to each other or two circularly polarized lights having opposite rotation directions.
【００１１】また前記のような動作原理であるがゆえに
波長補正板は１／４波長板であることが望ましい。もち
ろんこのほか３／４波長板やその他の波長補正板でも重
ねる方向により用いることができる。Further, the wavelength correction plate is preferably a quarter-wave plate because of the above-mentioned operation principle. Of course, a 3/4 wavelength plate or another wavelength correction plate can also be used depending on the overlapping direction.
【００１２】前記発光物質が有機化合物または有機金属
化合物である場合には、発光層は透明である事が多いた
め、本発明の構成は効果的に作用するが、他の透明な発
光物質であってもよい。When the luminescent material is an organic compound or an organometallic compound, the structure of the present invention works effectively because the luminescent layer is often transparent, but it is another transparent luminescent material. You may.
【００１３】また前記表示装置の表面にノングレア処理
そして／または減反射処理を施すことによりさらにコン
トラストを向上できる。Further, the contrast can be further improved by subjecting the surface of the display device to a non-glare treatment and / or an anti-reflection treatment.
【００１４】[0014]
［実施例］ (実施例１)本実施例では直線偏光ビームスプリッタを用
いた場合で、かつ波長補正板を1枚用いた構成の表示装
置の構造について例を示す。図１は本実施例の表示装置
を示す簡単な断面図である。透明基板上に複数の透明電
極（以下、透明電極群という）が形成され、その上に発
光層が形成されている。さらにその上に図のように金属
電極が形成されている。発光層から発せられる発光を有
効に取り出すために一方の電極は透明性電極であり、も
う一方の電極は反射性電極であることが望ましい。[Embodiment 1] (Embodiment 1) In this embodiment, an example of a structure of a display device using a linear polarization beam splitter and using one wavelength correction plate will be described. FIG. 1 is a simple sectional view showing the display device of the present embodiment. A plurality of transparent electrodes (hereinafter, referred to as a transparent electrode group) are formed on a transparent substrate, and a light emitting layer is formed thereon. Further, a metal electrode is formed thereon as shown in the figure. One electrode is preferably a transparent electrode and the other electrode is preferably a reflective electrode in order to effectively extract light emitted from the light emitting layer.
【００１５】通常は透明電極としてＩＴＯを用いるた
め、製膜条件上ＩＴＯはガラス基板上に形成されること
が多い。このような構造を前提にして、図１に示したよ
うに透明基板の透明電極と反対側の面に１／４波長板、
平面型偏光ビームスプリッタ、及び吸収型偏光板を重ね
て配置している。１／４波長板と延伸軸偏光ビームスプ
リッタの偏光軸は４５度の角度をなして重ねている。ま
た、偏光ビームスプリッタと吸収軸偏光板は透過光にお
ける偏光方向を揃えて重ね、１偏光が透過するように配
置している。一方、金属電極（群）を覆うように保護膜
が形成されてなり、各透明電極及び各金属電極には駆動
ドライバー回路から信号が供給されるように形成されて
いる。Since ITO is usually used as a transparent electrode, ITO is often formed on a glass substrate due to film forming conditions. Assuming such a structure, a １ ／ wavelength plate is provided on the surface of the transparent substrate opposite to the transparent electrode, as shown in FIG.
A plane-type polarizing beam splitter and an absorption-type polarizing plate are arranged in an overlapping manner. The polarization axes of the quarter-wave plate and the stretching axis polarizing beam splitter overlap at an angle of 45 degrees. Further, the polarizing beam splitter and the absorption axis polarizing plate are stacked so that the polarization directions of the transmitted light are aligned, and are arranged so that one polarized light is transmitted. On the other hand, a protective film is formed so as to cover the metal electrode (group), and each transparent electrode and each metal electrode are formed so that a signal is supplied from a drive driver circuit.
【００１６】この構成により、表示装置の表側から入射
した光の１偏光成分は効果的に表示装置表面の偏光板に
より吸収され反射光を半分にできる。With this configuration, one polarized light component of the light incident from the front side of the display device is effectively absorbed by the polarizing plate on the surface of the display device, and the reflected light can be halved.
【００１７】一方、発光層で発生した光は、半分の偏光
成分は直接表に出射し、残りの半分の偏光成分は偏光ビ
ームスプリッタで反射され波長補正板を通過して裏側の
金属電極で反射され、再び波長補正板を通過して偏光方
向を９０度捻じられて再び偏光ビームスプリッタに入射
して表側に出射する。このため発光層で発生した光はす
べて表側に出射できる事になり、明るさを減ずる事はな
いのである。On the other hand, in the light generated in the light emitting layer, half of the polarized light component is directly emitted to the front, and the other half of the polarized light component is reflected by the polarizing beam splitter, passes through the wavelength correction plate, and is reflected by the metal electrode on the back side. After passing through the wavelength correction plate again, the polarization direction is twisted by 90 degrees, and again enters the polarization beam splitter and exits to the front side. For this reason, all the light generated in the light emitting layer can be emitted to the front side, and the brightness is not reduced.
【００１８】一方、外部光を半分以下にできるためコン
トラストが向上し、明るいところでの視認性の向上を実
現できる。On the other hand, since the external light can be reduced to half or less, the contrast is improved, and the visibility in a bright place can be improved.
【００１９】具体的に、発光層として有機ＥＬを用いた
場合について例を挙げる。まず、洗浄したＩＴＯ電極付
きガラス基板に、正孔注入層として良く知られるＴＰＤ
を厚み１５０ｎｍに蒸着し、次に発光層および電子注入
層として良く知られるＡｌｑ３を厚み１００ｎｍに蒸着
した。最後にＭｇとＡｇを共蒸着して陰極とした。この
表示装置の明るさは２０００Ｃｄ／ｍ２／１０Ｖであっ
た。電圧を切ったとき、裏側の金属電極が光り、反射光
が入った場合、コントラストが著しく低下した。ちなみ
にパネルの反射率は８０％であった。Specifically, an example in which an organic EL is used as a light emitting layer will be described. First, a TPD well-known as a hole injection layer is placed on a cleaned glass substrate with an ITO electrode.
Was deposited to a thickness of 150 nm, and then Alq3, which is well known as a light emitting layer and an electron injection layer, was deposited to a thickness of 100 nm. Finally, Mg and Ag were co-deposited to form a cathode. The brightness of the display device was 2000Cd / m 2 / 10V. When the voltage was turned off, the metal electrode on the back side glowed, and when the reflected light entered, the contrast was significantly reduced. Incidentally, the reflectance of the panel was 80%.
【００２０】こうして作成した表示装置のガラス面側
に、先に示した１／４波長板を重ね、さらに直線偏光ビ
ームスプリッタを、先の波長補正板の延伸方向と偏光方
向が４５度の角度をなすように重ね、その上に吸収型偏
光板を透過光における偏光方向を合わせて重ね合わせ
た。On the glass surface side of the display device prepared in this manner, the above-described quarter-wave plate is superimposed, and a linearly polarized beam splitter is used to adjust the angle between the extension direction of the wavelength correction plate and the polarization direction by 45 degrees. Then, an absorption type polarizing plate was overlapped thereon with the polarization direction of transmitted light adjusted.
【００２１】こうして作成した表示装置の明るさは１８
００Ｃｄ／ｍ２であり、ほとんど明るさの低下を感じな
かった。また、反射光が入射した場合でも、パネルの反
射率は２５％であった。The brightness of the display device thus created is 18
It was 00 Cd / m 2 and almost no decrease in brightness was felt. Even when reflected light was incident, the reflectance of the panel was 25%.
【００２２】この表示装置表面に減反射コーティングし
たところ、パネルの反射率は２０％となり、明るいとこ
ろで極めて見やすくなった。またノングレア処理を施し
たところ、景色の映り込みが緩和され、表示が見やすく
なった。When the surface of the display device was coated with anti-reflection coating, the reflectance of the panel became 20%, making it extremely easy to see in a bright place. In addition, when non-glare processing was applied, the reflection of the scenery was reduced and the display became easier to see.
【００２３】（実施例２）本実施例では実施例1の構成
において偏光ビームスプリッタとして、円偏光ビームス
プリッタを用いた場合の例を示す。図２は本実施例の表
示装置を示す簡単な断面図である。(Embodiment 2) This embodiment shows an example in which a circularly polarized beam splitter is used as the polarized beam splitter in the configuration of the first embodiment. FIG. 2 is a simple sectional view showing the display device of this embodiment.
【００２４】透明基板上に透明電極が形成され、その上
に発光層が形成されている。さらにその上に金属電極が
形成されている。図に示したように透明基板の透明電極
と反対側の面に平面型円偏光ビームスプリッタ、１／４
波長板、および吸収型偏光板を重ねて配置している。円
偏光ビームスプリッタと吸収型偏光板の間の１／４波長
板は、その延伸方向を吸収型偏光板の偏光方向と４５度
の角度を成して重ねている。また、図１同様に、金属電
極５を覆うように保護膜が形成されてなり、各透明電
極、及び各金属電極に信号を供給するための駆動ドライ
バー回路が図のように接続されている。A transparent electrode is formed on a transparent substrate, and a light emitting layer is formed thereon. Further, a metal electrode is formed thereon. As shown in the figure, a plane circularly polarized beam splitter, １ ／, is provided on the surface of the transparent substrate opposite to the transparent electrode.
A wave plate and an absorption type polarizing plate are arranged in an overlapping manner. The 1/4 wavelength plate between the circularly polarized beam splitter and the absorption type polarizing plate overlaps the stretching direction at an angle of 45 degrees with the polarization direction of the absorption type polarizing plate. As in FIG. 1, a protective film is formed so as to cover the metal electrode 5, and a driving driver circuit for supplying a signal to each transparent electrode and each metal electrode is connected as shown in the figure.
【００２５】この構成により、表示装置の表側から入射
した光の1偏光成分は効果的に表示装置表面の偏光板に
より吸収され反射光を半分にできる。According to this configuration, one polarized light component of the light incident from the front side of the display device is effectively absorbed by the polarizing plate on the display device surface, and the reflected light can be halved.
【００２６】また、残りの入射光は吸収型偏光板を通り
抜け１／４波長板で円偏光となり、円偏光ビームスプリ
ッタを通り抜ける。このため円偏光ビームスプリッタの
表面反射を避けることができる。この時、吸収型偏光板
と１／４波長板の重ね方は、用いる円偏光ビームスプリ
ッタのタイプ、つまり右回り円偏光を反射するのか、左
回り円偏光を反射するのか、に左右される。The remaining incident light passes through the absorbing polarizer and becomes circularly polarized by the quarter-wave plate, and passes through the circularly polarized beam splitter. Therefore, surface reflection of the circularly polarized beam splitter can be avoided. At this time, the manner in which the absorption-type polarizing plate and the quarter-wave plate are overlapped depends on the type of the circularly polarized beam splitter to be used, that is, whether to reflect clockwise circularly polarized light or counterclockwise circularly polarized light.
【００２７】一方、発光層で発生した光は、半分の円偏
光成分は直接偏光ビームスプリッタを通り抜け、１／４
波長板で直線偏光になり、吸収型偏光板を透過して表に
出射し、残りの半分の円偏光成分は円偏光ビームスプリ
ッタで反射され裏側の金属電極で再び反射され、偏光の
回転方向が逆になって再び円偏光ビームスプリッタに入
射して表側に出射する。このため発光層で発生した光は
すべて表側に出射できる事になり、明るさを減ずる事は
ないのである。On the other hand, in the light generated in the light emitting layer, half of the circularly polarized light component passes directly through the polarizing beam splitter, and
The light is converted to linearly polarized light by the wave plate, passes through the absorption type polarizing plate, and is emitted to the front.The other half of the circularly polarized light component is reflected by the circularly polarized beam splitter, and is reflected again by the metal electrode on the back side. In the opposite direction, the light enters the circularly polarized beam splitter again and is emitted to the front side. For this reason, all the light generated in the light emitting layer can be emitted to the front side, and the brightness is not reduced.
【００２８】一方、先に述べたように外部光を半分以下
にできるためコントラストが向上し、明るいところでの
視認性の向上を実現できる。On the other hand, since the external light can be reduced to half or less as described above, the contrast is improved, and the visibility in a bright place can be improved.
【００２９】具体的には、円偏光ビームスプリッタとし
てはコレステリックピッチを５２０ｎｍの光を最も良く
反射するように調整したコレステリック液晶を間隙５μ
ｍのセルに封入したパネルを用い、実施例1であげた有
機ＥＬ素子と組み合わせた場合、表示装置の明るさは１
６００Ｃｄ／ｍ２であり、パネルの反射率は２９％であ
った。More specifically, a cholesteric liquid crystal whose cholesteric pitch is adjusted to reflect light of 520 nm best is a gap of 5 μm as a circularly polarized beam splitter.
When the panel sealed in the m cell is used and combined with the organic EL element described in Example 1, the brightness of the display device is 1
It was 600 Cd / m 2 , and the reflectance of the panel was 29%.
【００３０】この表示装置に減反射処理を施したとこ
ろ、パネルの反射率は２４％となった。またノングレア
処理を施したところ、景色の映り込みが緩和され、表示
が見やすくなった。When this display device was subjected to anti-reflection treatment, the reflectance of the panel was 24%. In addition, when non-glare processing was applied, the reflection of the scenery was reduced and the display became easier to see.
【００３１】以上２つの実施例においては発光層として
有機化合物を含む場合を示したが、鏡面感を有する発光
型ディスプレイには広く応用できる。In the above two embodiments, the case where the light emitting layer contains an organic compound has been described. However, the present invention can be widely applied to a light emitting type display having a mirror appearance.
【００３２】[0032]
【発明の効果】以上本発明によれば、非常に簡単な構成
により、明るくコントラストの高い発光型表示装置を実
現できる。これにより、野外などの非常に明るい場所に
おいても視認性の高い表示を行う事ができるため、携帯
型端末、車載用等のディスプレイに応用できる。According to the present invention, a light-emitting display device with high brightness and high contrast can be realized with a very simple structure. Accordingly, a display with high visibility can be performed even in a very bright place such as an outdoor area, and thus the display can be applied to a portable terminal, a display for a vehicle, or the like.
【図１】本発明の実施例１における表示装置の簡単な断
面図。FIG. 1 is a simple cross-sectional view of a display device according to a first embodiment of the present invention.
【図２】本発明の実施例２における表示装置の簡単な断
面図。FIG. 2 is a simple sectional view of a display device according to a second embodiment of the present invention.
【図３】従来の有機ＥＬ表示装置の簡単な断面図。FIG. 3 is a simple sectional view of a conventional organic EL display device.
１…透明基板 ２…透明電極 ３…正孔注入層 ４…発光層 ５…金属電極 ６…波長補正板 ７…直線偏光ビームスプリッタ ８…吸収型偏光板 ９…円偏光ビームスプリッタ。 DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Transparent electrode 3 ... Hole injection layer 4 ... Light emitting layer 5 ... Metal electrode 6 ... Wavelength correction plate 7 ... Linear polarization beam splitter 8 ... Absorption type polarization plate 9 ... Circular polarization beam splitter.
Claims (6)
り、前記一方の電極は基板の一方の面に形成されてな
り、前記基板の他方の面には波長補正板、平面型直線偏
光ビームスプリッタ、及び偏光板が形成されてなること
を特徴とする表示装置。1. A light emitting layer is sandwiched between opposing electrodes, said one electrode is formed on one surface of a substrate, and the other surface of said substrate has a wavelength correction plate and a planar linearly polarized light. A display device comprising a beam splitter and a polarizing plate.
板との間に前記波長補正板及び前記偏光ビームスプリッ
ターが形成されてなることを特徴とする表示装置。2. The display device according to claim 1, wherein the wavelength correction plate and the polarizing beam splitter are formed between the polarizing plate and the substrate.
／４波長板であることを特徴とする表示装置。3. The apparatus according to claim 1, wherein the wavelength correction plate is
A display device comprising a / 4 wavelength plate.
あることを特徴とする表示装置。4. The display device according to claim 1, wherein the light emitting layer is transparent.
合物、または有機金属化合物からなることを特徴とする
表示装置。5. The display device according to claim 1, wherein the light emitting layer is made of an organic compound or an organic metal compound.
ノングレア処理及び／または減反射処理が施されてなる
ことを特徴とする表示装置。6. The display device according to claim 1, wherein a non-glare treatment and / or an anti-reflection treatment is performed on a surface of the polarizing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9200639A JPH1145058A (en) | 1997-07-25 | 1997-07-25 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9200639A JPH1145058A (en) | 1997-07-25 | 1997-07-25 | Display device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002266881A Division JP2003115383A (en) | 2002-09-12 | 2002-09-12 | Display equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1145058A true JPH1145058A (en) | 1999-02-16 |
Family
ID=16427745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9200639A Withdrawn JPH1145058A (en) | 1997-07-25 | 1997-07-25 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1145058A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001343908A (en) * | 2000-05-31 | 2001-12-14 | Nitto Denko Corp | Touch type el display device and method for detecting input |
| JP2002207433A (en) * | 2001-01-10 | 2002-07-26 | Dainippon Printing Co Ltd | Self-light emitting type display |
| JP2003186413A (en) * | 2001-12-18 | 2003-07-04 | Hitachi Ltd | Display |
| US6706425B2 (en) | 1999-07-21 | 2004-03-16 | Nec Corporation | Organic EL panel and filter for same |
| US6882400B2 (en) | 2001-10-30 | 2005-04-19 | Seiko Epson Corporation | Electro-optical apparatus having a light-emitting element and wavelength correcting unit of plurality of liquid crystalline organic layers |
| US7012365B2 (en) | 2001-01-15 | 2006-03-14 | Hitachi, Ltd. | Light-emitting device and light-emitting display with a polarization separator between an emissive layer and a phase plate |
| US7067985B2 (en) | 2002-06-21 | 2006-06-27 | Hitachi Displays, Ltd. | Display device |
| US7492095B2 (en) | 2003-05-28 | 2009-02-17 | Samsung Mobile Display Co., Ltd. | Double-sided light emitting device |
| US8217572B2 (en) | 2005-10-18 | 2012-07-10 | Semiconductor Energy Laboratory Co., Ltd. | Display device with prism layer |
| JP2013024951A (en) * | 2011-07-19 | 2013-02-04 | Hitachi Ltd | Optical device |
-
1997
- 1997-07-25 JP JP9200639A patent/JPH1145058A/en not_active Withdrawn
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6706425B2 (en) | 1999-07-21 | 2004-03-16 | Nec Corporation | Organic EL panel and filter for same |
| JP2001343908A (en) * | 2000-05-31 | 2001-12-14 | Nitto Denko Corp | Touch type el display device and method for detecting input |
| JP2002207433A (en) * | 2001-01-10 | 2002-07-26 | Dainippon Printing Co Ltd | Self-light emitting type display |
| US7339316B2 (en) | 2001-01-15 | 2008-03-04 | Hitachi, Ltd | Organic light-emitting devices and displays including a polarization separator, a phase plate, and a polarizer |
| US7012365B2 (en) | 2001-01-15 | 2006-03-14 | Hitachi, Ltd. | Light-emitting device and light-emitting display with a polarization separator between an emissive layer and a phase plate |
| US6882400B2 (en) | 2001-10-30 | 2005-04-19 | Seiko Epson Corporation | Electro-optical apparatus having a light-emitting element and wavelength correcting unit of plurality of liquid crystalline organic layers |
| US7274423B2 (en) | 2001-10-30 | 2007-09-25 | Seiko Epson Corporation | Electro-optical apparatus having a light-emitting element, manufacturing method thereof, and electronic instrument |
| JP2003186413A (en) * | 2001-12-18 | 2003-07-04 | Hitachi Ltd | Display |
| US8198804B2 (en) | 2002-06-21 | 2012-06-12 | Hitachi Displays, Ltd. | Display device |
| US7425794B2 (en) | 2002-06-21 | 2008-09-16 | Hitachi Displays, Ltd. | Display device |
| US7557494B2 (en) | 2002-06-21 | 2009-07-07 | Hitachi Displays, Ltd. | Display device |
| US7928639B2 (en) | 2002-06-21 | 2011-04-19 | Hitachi Displays, Ltd. | Display device |
| US7067985B2 (en) | 2002-06-21 | 2006-06-27 | Hitachi Displays, Ltd. | Display device |
| US7492095B2 (en) | 2003-05-28 | 2009-02-17 | Samsung Mobile Display Co., Ltd. | Double-sided light emitting device |
| US7876042B2 (en) | 2003-05-28 | 2011-01-25 | Samsung Mobile Display Co., Ltd. | Double-sided light emitting device |
| US7915817B2 (en) | 2003-05-28 | 2011-03-29 | Samsung Mobile Display Co., Ltd. | Double-sided light emitting device |
| US8217572B2 (en) | 2005-10-18 | 2012-07-10 | Semiconductor Energy Laboratory Co., Ltd. | Display device with prism layer |
| US9184415B2 (en) | 2005-10-18 | 2015-11-10 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic apparatus |
| JP2013024951A (en) * | 2011-07-19 | 2013-02-04 | Hitachi Ltd | Optical device |
| US9354434B2 (en) | 2011-07-19 | 2016-05-31 | Hitachi, Ltd. | Optical apparatus |
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