JP2001201739A - Projection mode video display device and optical parts - Google Patents
Projection mode video display device and optical partsInfo
- Publication number
- JP2001201739A JP2001201739A JP2000010269A JP2000010269A JP2001201739A JP 2001201739 A JP2001201739 A JP 2001201739A JP 2000010269 A JP2000010269 A JP 2000010269A JP 2000010269 A JP2000010269 A JP 2000010269A JP 2001201739 A JP2001201739 A JP 2001201739A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- light source
- projection
- polarizing plates
- crystal 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶パネルをライ
トバルブ素子として使用してスクリーン上に映像を投影
する投射装置、例えば、液晶プロジェクタ装置や、液晶
テレビジョン、投射型ディスプレイ装置等の投射型映像
表示装置及び光学部品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection device for projecting an image on a screen using a liquid crystal panel as a light valve element, for example, a projection device such as a liquid crystal projector device, a liquid crystal television, and a projection display device. The present invention relates to an image display device and optical components.
【０００２】[0002]
【従来の技術】透過型液晶表示素子を搭載した投射型映
像表示装置においては、必ずその前後に少なくとも一対
の偏光素子を配置し、液晶表示素子の光源側すなわち入
射側の偏光素子を偏光子、投射レンズ側すなわち出射側
の偏光素子を検光子として用いる。2. Description of the Related Art In a projection type image display apparatus equipped with a transmissive liquid crystal display element, at least a pair of polarizing elements are always arranged before and after the liquid crystal display element, and a polarizing element on the light source side of the liquid crystal display element, that is, an incident side is a polarizer. The polarizing element on the side of the projection lens, that is, on the exit side, is used as an analyzer.
【０００３】偏光子に入射する光の偏光をあらかじめ直
線偏光にするために、光源と液晶表示素子の直前に配置
される偏光子の間に偏光変換素子を用いるのが一般的で
あるが、この偏光変換素子の性能が十分でないために完
全な直線偏光とはならず、偏光子での光の吸収すなわち
熱の発生となる。In order to previously convert the light incident on the polarizer into linearly polarized light, a polarization conversion element is generally used between the light source and the polarizer disposed immediately before the liquid crystal display element. Since the performance of the polarization conversion element is not sufficient, the polarization conversion element does not become perfect linearly polarized light, and absorbs light, that is, generates heat in the polarizer.
【０００４】また、液晶表示素子の機能は検光子に入射
させる偏光を制御して透過率を変化させるものであり、
透過しない光は検光子で吸収される。特に画面を全黒表
示する際に検光子に入射する光は、偏光板吸収軸と平行
位の直線偏光となっており、検光子で光のほとんどを吸
収し多量の熱が発生する。[0004] The function of the liquid crystal display element is to change the transmittance by controlling the polarization incident on the analyzer.
Light that does not pass is absorbed by the analyzer. In particular, when the screen is displayed in all black, the light incident on the analyzer is linearly polarized light parallel to the absorption axis of the polarizing plate, and the analyzer absorbs most of the light and generates a large amount of heat.
【０００５】従来は、液晶表示素子の光源側に配置され
る偏光子および投射レンズ側に配置される検光子には、
ガラス基板またはサファイヤ基板等の透光性部材の片面
に１枚の偏光板を貼合する方式、若しくはこれら２枚を
使用して基板に対して光源側の偏光板の偏光度を他方に
対して低くする方式が一般的であった。Conventionally, a polarizer disposed on the light source side of a liquid crystal display element and an analyzer disposed on the projection lens side include:
A method in which one polarizing plate is attached to one surface of a translucent member such as a glass substrate or a sapphire substrate, or the degree of polarization of the polarizing plate on the light source side with respect to the substrate is determined using the two substrates. The method of making it low was common.
【０００６】[0006]
【発明が解決しようとする課題】光学素子の寿命維持お
よび色むらのない高画質のためには、効率のよい放熱お
よび偏光板の面内温度均一化が必須である。しかし、近
年益々高輝度化および小型化が進む中、上記構成におけ
るこれらの解決が困難となってきた。In order to maintain the life of the optical element and to achieve high image quality without color unevenness, it is essential to efficiently dissipate heat and make the in-plane temperature of the polarizing plate uniform. However, in recent years, with higher luminance and smaller size, it is difficult to solve these problems in the above configuration.
【０００７】偏光子・検光子ともに偏光板は発熱源であ
り、効率よく冷却する必要がある。ガラスの片面に偏光
板を貼合する一般的な方式では、ガラス基板の熱伝導率
が低いために放熱の大部分は偏光板表面からのものであ
る。ガラスに対して熱伝導の高いサファイヤを基板に用
いたものもあるが、効果は十分ではない。そこで、偏光
板を２枚構成とし、光源に近い偏光板に偏光度の低いも
のを用いることで発熱源を分散させることができる。し
かし、これら２枚をそれぞれ別のガラス基板に貼合した
場合、十分な風路を確保するためには装置全体のサイズ
が大きくなってしまう。[0007] The polarizing plate is a heat source for both the polarizer and the analyzer and needs to be efficiently cooled. In a general method of bonding a polarizing plate to one side of glass, most of the heat radiation is from the polarizing plate surface because the thermal conductivity of the glass substrate is low. Some substrates use sapphire, which has high thermal conductivity to glass, but the effect is not sufficient. Therefore, a heat source can be dispersed by using two polarizing plates and using a polarizing plate having a low degree of polarization as a polarizing plate close to the light source. However, when these two sheets are bonded to different glass substrates, the size of the entire apparatus becomes large in order to secure a sufficient air path.
【０００８】本発明の目的は、上記従来技術の課題を解
決し、小型・高輝度化と長寿命化・高画質化の両立手段
を提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide means for achieving both miniaturization, high luminance, long life and high image quality.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、第１の発明では、光源と照明光学系と液晶表示素子
と投射レンズを備えた投写型映像表示装置において、前
記液晶表示素子の前記光源側に配置される偏光子を２枚
の偏光板を用いた構成とし、かつ該２枚の偏光板のうち
前記光源に近いものの偏光度を他方に対して低くし、さ
らに該２枚の偏光板を透光性部材の両面に固定した構成
とする。According to a first aspect of the present invention, there is provided a projection-type image display device comprising a light source, an illumination optical system, a liquid crystal display element, and a projection lens. The polarizer disposed on the light source side has a configuration using two polarizing plates, and of the two polarizing plates, the degree of polarization of the one closer to the light source is lower than the other, and the two polarizers are further arranged. The polarizing plate is configured to be fixed to both surfaces of the translucent member.
【００１０】第２の発明では、光源と照明光学系と液晶
表示素子と投射レンズを備えた投写型映像表示装置にお
いて、前記液晶表示素子の前記投射レンズ側に配置され
る検光子を２枚の偏光板を用いた構成とし、かつ該２枚
の偏光板のうち前記光源に近いものの偏光度を他方に対
して低くし、さらに該２枚の偏光板を透光性部材の両面
に固定した構成とする。According to a second aspect of the present invention, in a projection type image display apparatus provided with a light source, an illumination optical system, a liquid crystal display element, and a projection lens, two analyzers arranged on the projection lens side of the liquid crystal display element are provided. A configuration in which a polarizing plate is used, and the degree of polarization of one of the two polarizing plates that is closer to the light source is lower than that of the other, and the two polarizing plates are fixed to both surfaces of a light transmitting member. And
【００１１】第３の発明では、光源と照明光学系と液晶
表示素子と投射レンズを備えた投写型映像表示装置にお
いて、前記液晶表示素子の前記光源側に配置される偏光
子と前記投射レンズ側に配置される検光子とをそれぞれ
２枚の偏光板を用いた構成とし、かつ該２枚の偏光板の
うち前記光源に近いものの偏光度を他方に対して低く
し、さらに該２枚の偏光板を透光性部材の両面に固定し
た構成とする。According to a third aspect of the present invention, in a projection display apparatus including a light source, an illumination optical system, a liquid crystal display element, and a projection lens, a polarizer disposed on the light source side of the liquid crystal display element and the projection lens side And two analyzers, each having two polarizers, and of the two polarizers, the degree of polarization of the one closer to the light source is lower than the other, and the two polarizers are further arranged. The plate is fixed to both sides of the translucent member.
【００１２】第４の発明では、光源と照明光学系と液晶
表示素子と投射レンズを備えた投写型映像表示装置にお
いて、前記液晶表示素子の前記光源側に配置される偏光
子を、２枚の偏光板を透光性部材の両面に固定した構成
とする。According to a fourth aspect of the present invention, in a projection display apparatus including a light source, an illumination optical system, a liquid crystal display element, and a projection lens, two polarizers are disposed on the light source side of the liquid crystal display element. The polarizing plate is configured to be fixed to both surfaces of the translucent member.
【００１３】第５の発明では、第１〜第４の発明の透光
性部材にガラスを用いる。In the fifth invention, glass is used for the translucent member of the first to fourth inventions.
【００１４】第６の発明では、第１〜第４の発明の透光
性部材にサファイヤを用いる。In a sixth aspect, sapphire is used for the light transmitting member of the first to fourth aspects.
【００１５】第７の発明では、２枚の偏光板を用いた構
成の光学部品であって、かつ該２枚の偏光板のうち一方
の偏光度を他方に対して低くし、さらに該２枚の偏光板
を透光性部材の両面に固定した構成とする。According to a seventh aspect of the present invention, there is provided an optical component having a configuration using two polarizing plates, wherein one of the two polarizing plates has a lower degree of polarization than the other, and Are fixed to both surfaces of the translucent member.
【００１６】上記手段により、本発明では１枚のガラス
の両面に偏光板を固定することで、セットのサイズを増
加させずに偏光板表面積の増加すなわち冷却の高効率化
を実現できる。By the above means, in the present invention, by fixing the polarizing plate on both surfaces of one glass, the surface area of the polarizing plate can be increased, that is, the cooling efficiency can be increased without increasing the size of the set.
【００１７】一方、偏光板の発熱は周辺部よりも中央部
の方が多いために面内に温度ムラが生じる。これによ
り、偏光板面内での透過率ムラが生じ、投射画像におけ
る面内色度差すなわち色むらの要因となっている。上記
手段により、上記構成において基板としてガラスのかわ
りにサファイヤを用いることで、高い熱伝導性により面
内の温度ムラも解消できる。On the other hand, since the heat generated by the polarizing plate is greater in the central part than in the peripheral part, temperature unevenness occurs in the plane. Thereby, transmittance unevenness occurs in the plane of the polarizing plate, which causes a difference in in-plane chromaticity, that is, color unevenness in a projected image. By using sapphire instead of glass as the substrate in the above configuration, the above-described means can eliminate in-plane temperature unevenness due to high thermal conductivity.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図５は、本発明による投写型液晶表示装置
の一実施形態を示す、光学系構成図である。FIG. 5 is an optical system configuration diagram showing an embodiment of the projection type liquid crystal display device according to the present invention.
【００２０】図５において、投射型液晶表示装置には、
光源１があり、光源１は、超高圧水銀ランプ、メタルハ
ライドランプ、キセノンランプ、水銀キセノンランプ、
ハロゲンランプ等の白色ランプである。光源１から出射
した光は、円形ないし多角形の出射開口を持つ反射鏡２
で反射される。この光源１と反射鏡２を合わせて光源ユ
ニットと呼ぶこととする。光源ユニットを出射した光
は、第１アレイレンズ３、第２アレイレンズ４、偏光変
換素子５を通過して全反射ミラー６にて光線の方向を９
０°曲げられ、ダイクロイックミラー７とダイクロイッ
クミラー８によってＲ（赤色）、Ｇ（緑色）、Ｂ（青
色）に分離された後、全反射ミラー９、全反射ミラー１
０、全反射ミラー１１により光線の方向を曲げられて
Ｒ、Ｇ、Ｂに対応するライトバルブ素子である液晶表示
素子１２、液晶表示素子１３、液晶表示素子１４に入射
する。Ｒ、Ｇ、Ｂそれぞれの液晶表示素子を通過した光
はダイクロイックプリズム１５によって再び合成され、
投射レンズ１６によってスクリーンに投射される。In FIG. 5, the projection type liquid crystal display device includes:
There is a light source 1, and the light source 1 includes an ultra-high pressure mercury lamp, a metal halide lamp, a xenon lamp, a mercury xenon lamp,
It is a white lamp such as a halogen lamp. Light emitted from the light source 1 is reflected by a reflecting mirror 2 having a circular or polygonal exit aperture.
Is reflected by The light source 1 and the reflecting mirror 2 are collectively called a light source unit. The light emitted from the light source unit passes through the first array lens 3, the second array lens 4, and the polarization conversion element 5, and changes its direction to 9 at the total reflection mirror 6.
After being bent by 0 ° and separated into R (red), G (green), and B (blue) by dichroic mirror 7 and dichroic mirror 8, total reflection mirror 9 and total reflection mirror 1
0, the direction of the light beam is bent by the total reflection mirror 11, and is incident on the liquid crystal display element 12, the liquid crystal display element 13, and the liquid crystal display element 14, which are light valve elements corresponding to R, G, and B. The light that has passed through the R, G, and B liquid crystal display elements is recombined by the dichroic prism 15,
The light is projected on the screen by the projection lens 16.
【００２１】図１および図２は本発明の実施形態を示し
た液晶表示素子近傍の構成図である。FIG. 1 and FIG. 2 are configuration diagrams in the vicinity of a liquid crystal display device showing an embodiment of the present invention.
【００２２】ただし、図１、図２、図３、図４中の液晶
表示素子１７は、図５中の液晶表示素子１２、液晶表示
素子１３、液晶表示素子１４いずれにも対応するものと
する。However, the liquid crystal display element 17 in FIGS. 1, 2, 3, and 4 corresponds to any of the liquid crystal display element 12, the liquid crystal display element 13, and the liquid crystal display element 14 in FIG. .
【００２３】本発明では、図１及び図２のように液晶表
示素子１７の入射側または出射側に基板１９，２２両面
に偏光板１８，２０または２１，２２を貼合したものを
配置する。この基板１９，２２はガラス又はサファイヤ
である。このうち、基板の光源側に貼合する偏光板１８
または２１の偏光度を低くすることで、２枚の偏光板の
発熱量が分散する。In the present invention, as shown in FIG. 1 and FIG. 2, the liquid crystal display element 17 is provided with a polarizing plate 18, 20, or 21, 22 bonded on both sides of the substrates 19, 22 on the incident side or the emitting side. The substrates 19 and 22 are made of glass or sapphire. Among them, the polarizing plate 18 bonded to the light source side of the substrate
Alternatively, by lowering the degree of polarization of 21, the calorific values of the two polarizing plates are dispersed.
【００２４】図３及び図４のような従来の構成では、空
気に触れる偏光板表面が１面であったのに対し、本発明
の構成では２面になるので、放熱効果が高くなり部品の
温度を低く抑えることができる。In the conventional structure as shown in FIGS. 3 and 4, only one surface of the polarizing plate is exposed to air, whereas in the structure of the present invention, two surfaces are provided. The temperature can be kept low.
【００２５】なお、本発明は液晶表示素子の入射側と出
射側いずれか片方のみに対しても適用できることはいう
までもない。It is needless to say that the present invention can be applied to only one of the incident side and the outgoing side of the liquid crystal display element.
【００２６】また、基板１９、２２としては、従来より
用いられている安価なガラスを使用することができる。
また、基板としてサファイヤを使用した場合には、ガラ
スに比べて、その高い熱伝導性により面内の温度ムラも
解消できる。Further, as the substrates 19 and 22, inexpensive glass conventionally used can be used.
Further, when sapphire is used as a substrate, in-plane temperature unevenness can be eliminated due to its higher thermal conductivity as compared with glass.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
少なくとも光源と照明光学系と液晶表示素子と投射レン
ズからなる投写型映像表示装置において、前記液晶表示
素子の前記光源側に配置される偏光子を偏光板２枚構成
とし、かつ前記２枚の偏光板のうち前記光源に近いもの
の偏光度が他方に対して低く、さらに前記２枚の偏光板
を透光性部材の両面に貼合しているので、セットのサイ
ズを増加させずに偏光子の偏光板表面積の増加すなわち
冷却の高効率化を実現できる。As described above, according to the present invention,
In a projection display apparatus including at least a light source, an illumination optical system, a liquid crystal display element, and a projection lens, a polarizer disposed on the light source side of the liquid crystal display element includes two polarizers, and the two polarizers are arranged. Since the degree of polarization of the plate closer to the light source is lower than the other, and the two polarizing plates are bonded to both sides of the translucent member, the polarizer can be used without increasing the size of the set. It is possible to increase the surface area of the polarizing plate, that is, to increase the cooling efficiency.
【００２８】また、本発明によれば、少なくとも光源と
照明光学系と液晶表示素子と投射レンズからなる投写型
映像表示装置において、前記液晶表示素子の前記投射レ
ンズ側に配置される検光子を偏光板２枚構成とし、かつ
前記２枚の偏光板のうち前記光源に近いものの偏光度が
他方に対して低く、さらに前記２枚の偏光板を透光性部
材の両面に貼合しているので、セットのサイズを増加さ
せずに検光子の偏光板表面積の増加すなわち冷却の高効
率化を実現できる。According to the present invention, in a projection display apparatus comprising at least a light source, an illumination optical system, a liquid crystal display element, and a projection lens, an analyzer disposed on the projection lens side of the liquid crystal display element is polarized. Because the two polarizing plates are used, and the degree of polarization of one of the two polarizing plates closer to the light source is lower than the other, and the two polarizing plates are bonded to both surfaces of the light transmitting member. In addition, it is possible to increase the surface area of the polarizing plate of the analyzer, that is, to increase the cooling efficiency without increasing the size of the set.
【００２９】また、本発明によれば、少なくとも光源と
照明光学系と液晶表示素子と投射レンズからなる投写型
映像表示装置において、前記液晶表示素子の前記光源側
に配置される偏光子と前記投射レンズ側に配置される検
光子とをそれぞれ偏光板２枚構成とし、かつ前記２枚の
偏光板のうち前記光源に近いものの偏光度が他方に対し
て低く、さらに前記２枚の偏光板を透光性部材の両面に
貼合しているので、セットのサイズを増加させずに偏光
子および検光子の偏光板表面積の増加すなわち冷却の高
効率化を実現できる。Further, according to the present invention, in a projection display apparatus comprising at least a light source, an illumination optical system, a liquid crystal display element, and a projection lens, a polarizer disposed on the light source side of the liquid crystal display element and the projection The analyzer arranged on the lens side is composed of two polarizing plates, respectively, and the polarization degree of the one of the two polarizing plates that is closer to the light source is lower than the other, and the two polarizing plates are transmitted through the two polarizing plates. Since the optical members are bonded to both sides, it is possible to increase the surface area of the polarizing plate of the polarizer and the analyzer, that is, to increase the cooling efficiency without increasing the size of the set.
【００３０】また、本発明によれば、透光性部材にガラ
スを用いたので、従来と同様に安価なガラス基板を用い
ることができる。Further, according to the present invention, since glass is used for the translucent member, an inexpensive glass substrate can be used as in the prior art.
【００３１】また、本発明によれば、透光性部材にサフ
ァイヤを用いたので、ガラスに比べて、その高い熱伝導
性により面内の温度ムラも解消できる。これにより、偏
光板面内での透過率ムラを解消でき、投射画像における
面内色度差すなわち色むらを解消できる。Further, according to the present invention, since sapphire is used for the translucent member, in-plane temperature unevenness can be eliminated due to its higher thermal conductivity than glass. Thereby, the transmittance unevenness in the plane of the polarizing plate can be eliminated, and the in-plane chromaticity difference, that is, the color unevenness in the projected image can be eliminated.
【００３２】また、本発明によれば、偏光板２枚構成の
光学部品であって、かつ前記２枚の偏光板のうち一方の
偏光度が他方に対して低く、さらに前記２枚の偏光板を
透光性部材の両面に貼合している光学部品は、投射型映
像表示装置のみならず、その他の装置に一般に使用され
る偏光子や検光子に用いた場合にも、その装置のセット
のサイズを増加させずに偏光子および検光子の偏光板表
面積の増加すなわち冷却の高効率化を実現できる、とい
った効果がある。According to the present invention, there is provided an optical component comprising two polarizing plates, wherein one of the two polarizing plates has a lower degree of polarization than the other, and the two polarizing plates are further provided. The optical parts bonded to both sides of the translucent member are used not only for the projection type image display device but also for the polarizer and analyzer generally used for other devices. This has the effect of increasing the surface area of the polarizing plate of the polarizer and the analyzer, that is, increasing the efficiency of cooling without increasing the size of the polarizer.
【図１】本発明の投射型液晶表示装置における一実施例
の一部を示す上面概略図である。FIG. 1 is a schematic top view showing a part of one embodiment of a projection type liquid crystal display device of the present invention.
【図２】本発明の投射型液晶表示装置における一実施例
の一部を示す上面概略図である。FIG. 2 is a schematic top view showing a part of one embodiment of the projection type liquid crystal display device of the present invention.
【図３】従来の投射型液晶表示装置における一実施例の
一部を示す上面概略図である。FIG. 3 is a schematic top view showing a part of one embodiment of a conventional projection type liquid crystal display device.
【図４】従来の投射型液晶表示装置における一実施例の
一部を示す上面概略図である。FIG. 4 is a schematic top view showing a part of one embodiment of a conventional projection type liquid crystal display device.
【図５】本発明の投射型液晶表示装置における一実施形
態を示す上面概略図である。FIG. 5 is a schematic top view showing an embodiment of the projection type liquid crystal display device of the present invention.
１…光源、２…反射鏡、３…第１アレイレンズ、４…第
２アレイレンズ、５…偏光変換素子、６…全反射ミラ
ー、７…ダイクロイックミラー、８…ダイクロイックミ
ラー、９…全反射ミラー、１０…全反射ミラー、１１…
全反射ミラー、１２…液晶表示素子、１３…液晶表示素
子、１４…液晶表示素子、１５…ダイクロイックプリズ
ム、１６…投射レンズ、１７…液晶表示素子、１８…偏
光板、１９…基板、２０…偏光板、２１…偏光板、２２
…基板、２３…偏光板、２４…基板、２５…偏光板、２
６…偏光板、２７…基板、２８…偏光板ASS'Y、２９…
偏光板ASS'Y、３０…偏光板ASS'Y、３１…偏光板ASS'
Y、３２…偏光板ASS'Y、３３…偏光板ASS'Y。DESCRIPTION OF SYMBOLS 1 ... Light source, 2 ... Reflection mirror, 3 ... First array lens, 4 ... Second array lens, 5 ... Polarization conversion element, 6 ... Total reflection mirror, 7 ... Dichroic mirror, 8 ... Dichroic mirror, 9 ... Total reflection mirror , 10 ... Total reflection mirror, 11 ...
Total reflection mirror, 12: liquid crystal display element, 13: liquid crystal display element, 14: liquid crystal display element, 15: dichroic prism, 16: projection lens, 17: liquid crystal display element, 18: polarizing plate, 19: substrate, 20: polarized light Plate, 21 ... polarizing plate, 22
... substrate, 23 ... polarizer, 24 ... substrate, 25 ... polarizer, 2
6 ... polarizer, 27 ... substrate, 28 ... polarizer ASS'Y, 29 ...
Polarizing plate ASS'Y, 30 ... Polarizing plate ASS'Y, 31 ... Polarizing plate ASS'Y
Y, 32: polarizing plate ASS'Y, 33: polarizing plate ASS'Y.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中島 努 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所デジタルメディアシステ ム事業部内 (72)発明者 山口 英治 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所デジタルメディアシステ ム事業部内 Ｆターム(参考） 2H088 EA12 HA01 HA13 HA18 HA21 HA24 MA06 MA20 2H091 FA05X FA08X FA08Z FA26X FA41Z GA01 LA18 LA30 MA07 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Nakajima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Digital Media System Division, Hitachi, Ltd. 292 Hitachi Media, Ltd. Digital Media Systems Division F-term (reference) 2H088 EA12 HA01 HA13 HA18 HA21 HA24 MA06 MA20 2H091 FA05X FA08X FA08Z FA26X FA41Z GA01 LA18 LA30 MA07
Claims (7)
ンズを備えた投写型映像表示装置において、 前記液晶表示素子の前記光源側に配置される偏光子を２
枚の偏光板を用いた構成とし、かつ該２枚の偏光板のう
ち前記光源に近いものの偏光度を他方に対して低くし、
さらに該２枚の偏光板を透光性部材の両面に固定してい
ることを特徴とする投写型映像表示装置。1. A projection-type image display device comprising a light source, an illumination optical system, a liquid crystal display element, and a projection lens, wherein a polarizer disposed on the light source side of the liquid crystal display element has two polarizers.
A configuration using two polarizing plates, and of the two polarizing plates, the degree of polarization of the one closer to the light source is lower than the other, and
Further, the two polarizing plates are fixed to both surfaces of the translucent member.
ンズを備えた投写型映像表示装置において、 前記液晶表示素子の前記投射レンズ側に配置される検光
子を２枚の偏光板を用いた構成とし、かつ該２枚の偏光
板のうち前記光源に近いものの偏光度を他方に対して低
くし、さらに該２枚の偏光板を透光性部材の両面に固定
していることを特徴とする投写型映像表示装置。2. A projection type video display apparatus comprising a light source, an illumination optical system, a liquid crystal display element, and a projection lens, wherein an analyzer arranged on the projection lens side of the liquid crystal display element uses two polarizing plates. Wherein the degree of polarization of one of the two polarizing plates closer to the light source is lower than that of the other, and the two polarizing plates are fixed to both surfaces of the light transmitting member. Projection type video display device.
ンズを備えた投写型映像表示装置において、 前記液晶表示素子の前記光源側に配置される偏光子と前
記投射レンズ側に配置される検光子とをそれぞれ２枚の
偏光板を用いた構成とし、かつ該２枚の偏光板のうち前
記光源に近いものの偏光度を他方に対して低くし、さら
に該２枚の偏光板を透光性部材の両面に固定しているこ
とを特徴とする投写型映像表示装置。3. A projection display apparatus comprising a light source, an illumination optical system, a liquid crystal display element, and a projection lens, wherein a polarizer disposed on the light source side of the liquid crystal display element and a projection lens side. The analyzer is configured to use two polarizing plates, and of the two polarizing plates, the one near the light source has a lower degree of polarization with respect to the other, and furthermore, the two polarizing plates transmit light. A projection-type image display device, wherein the projection-type image display device is fixed to both surfaces of a conductive member.
ンズを備えた投写型映像表示装置において、 前記液晶表示素子の前記光源側に配置される偏光子を、
２枚の偏光板を透光性部材の両面に固定した構成とした
ことを特徴とする投写型映像表示装置。4. A projection display apparatus comprising a light source, an illumination optical system, a liquid crystal display element, and a projection lens, wherein a polarizer arranged on the light source side of the liquid crystal display element is provided.
A projection-type image display device, wherein two polarizing plates are fixed to both surfaces of a translucent member.
〜４のいずれかに記載の投写型映像表示装置。5. The method according to claim 1, wherein said light-transmitting member is made of glass.
5. The projection-type image display device according to any one of items 1 to 4.
項１〜４のいずれかに記載の投写型映像表示装置。6. The projection type video display according to claim 1, wherein sapphire is used for said translucent member.
該２枚の偏光板のうち一方の偏光度が他方に対して低
く、さらに該２枚の偏光板を透光性部材の両面に固定し
ていることを特徴とする光学部品。7. An optical component comprising two polarizing plates, wherein one of the two polarizing plates has a lower degree of polarization than the other, and furthermore, the two polarizing plates are formed of a light-transmitting member. Optical parts characterized by being fixed on both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010269A JP2001201739A (en) | 2000-01-17 | 2000-01-17 | Projection mode video display device and optical parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010269A JP2001201739A (en) | 2000-01-17 | 2000-01-17 | Projection mode video display device and optical parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001201739A true JP2001201739A (en) | 2001-07-27 |
| JP2001201739A5 JP2001201739A5 (en) | 2005-05-19 |
Family
ID=18538306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000010269A Pending JP2001201739A (en) | 2000-01-17 | 2000-01-17 | Projection mode video display device and optical parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001201739A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081657A1 (en) * | 2003-03-14 | 2004-09-23 | Seiko Epson Corporation | Optical device and projector comprising it |
| JP2007148397A (en) * | 2005-11-04 | 2007-06-14 | Semiconductor Energy Lab Co Ltd | Display device |
| JP2007183584A (en) * | 2005-12-05 | 2007-07-19 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
| JP2007256939A (en) * | 2006-02-24 | 2007-10-04 | Semiconductor Energy Lab Co Ltd | Display device |
| JP2009042454A (en) * | 2007-08-08 | 2009-02-26 | Hitachi Ltd | Liquid crystal display device and backlight projection unit, and electronic blackboard device using liquid crystal display device |
| JP2009271478A (en) * | 2007-12-28 | 2009-11-19 | Sumitomo Chemical Co Ltd | Polaroid sheet |
| JP2009276401A (en) * | 2008-05-12 | 2009-11-26 | Teijin Ltd | Laminated sheet polarizer and liquid crystal display device |
| US7956957B2 (en) | 2006-02-24 | 2011-06-07 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| JP2014170230A (en) * | 2014-03-17 | 2014-09-18 | Hitachi Consumer Electronics Co Ltd | Liquid crystal display device |
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| JPH02128127U (en) * | 1989-03-29 | 1990-10-23 | ||
| JPH10133196A (en) * | 1996-10-28 | 1998-05-22 | Sony Corp | Liquid crystal display device and polarizing plate for it |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128127U (en) * | 1989-03-29 | 1990-10-23 | ||
| JPH10133196A (en) * | 1996-10-28 | 1998-05-22 | Sony Corp | Liquid crystal display device and polarizing plate for it |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081657A1 (en) * | 2003-03-14 | 2004-09-23 | Seiko Epson Corporation | Optical device and projector comprising it |
| US7148945B2 (en) | 2003-03-14 | 2006-12-12 | Seiko Epson Corporation | Optical device having a plurality of optical modulator units, projector equipping the same, and particular heat insulation |
| JP2007148397A (en) * | 2005-11-04 | 2007-06-14 | Semiconductor Energy Lab Co Ltd | Display device |
| JP2007183584A (en) * | 2005-12-05 | 2007-07-19 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
| JP2007256939A (en) * | 2006-02-24 | 2007-10-04 | Semiconductor Energy Lab Co Ltd | Display device |
| US7956957B2 (en) | 2006-02-24 | 2011-06-07 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| KR101334043B1 (en) | 2006-02-24 | 2013-11-29 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Display device |
| JP2009042454A (en) * | 2007-08-08 | 2009-02-26 | Hitachi Ltd | Liquid crystal display device and backlight projection unit, and electronic blackboard device using liquid crystal display device |
| JP2009271478A (en) * | 2007-12-28 | 2009-11-19 | Sumitomo Chemical Co Ltd | Polaroid sheet |
| JP2009276401A (en) * | 2008-05-12 | 2009-11-26 | Teijin Ltd | Laminated sheet polarizer and liquid crystal display device |
| JP2014170230A (en) * | 2014-03-17 | 2014-09-18 | Hitachi Consumer Electronics Co Ltd | Liquid crystal display device |
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