JPH04247404A - Liquid crystal projection type display - Google Patents
Liquid crystal projection type displayInfo
- Publication number
- JPH04247404A JPH04247404A JP3031469A JP3146991A JPH04247404A JP H04247404 A JPH04247404 A JP H04247404A JP 3031469 A JP3031469 A JP 3031469A JP 3146991 A JP3146991 A JP 3146991A JP H04247404 A JPH04247404 A JP H04247404A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- light source
- polarizing plate
- type display
- projection type
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 45
- 230000010287 polarization Effects 0.000 claims abstract description 20
- 238000002834 transmittance Methods 0.000 claims description 16
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 11
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 8
- 229910052740 iodine Inorganic materials 0.000 description 8
- 239000011630 iodine Substances 0.000 description 8
- 210000002858 crystal cell Anatomy 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910001507 metal halide Inorganic materials 0.000 description 3
- 150000005309 metal halides Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001045 blue dye Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000001046 green dye Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001043 yellow dye Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Projection Apparatus (AREA)
- Polarising Elements (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は液晶放射型ディスプレー
に関する。さらに詳しくは耐光性、耐熱性に優れた高信
頼性の液晶投射型ディスプレーに関するものである。FIELD OF THE INVENTION This invention relates to liquid crystal emissive displays. More specifically, the present invention relates to a highly reliable liquid crystal projection display with excellent light resistance and heat resistance.
【０００２】0002
【従来の技術】従来、専らＣＲＴ（カソードレイチュー
ブ）方式で構成されていたプロジェクシヨンテレビの分
野で、最近、液晶表示体の高密度画素形式技術の発展に
より、液晶投射型ディスプレーによる方式が、採用され
る様になって来た。BACKGROUND OF THE INVENTION In the field of projection television, which has traditionally been constructed exclusively using CRT (cathode ray tube) systems, recent developments in high-density pixel format technology for liquid crystal displays have led to the use of liquid crystal projection display systems. It's starting to get hired.
【０００３】液晶投射型ディスプレーの場合、その液晶
画像形成部に偏光板、カラーフィルターを使用する為に
それらにより光が大幅に吸収されること、および１イン
チ〜６インチの小面積の画像を数１０インチ乃至１００
数インチ適度まで拡大すること等により明るさの低減は
避けられず、その為光源としては高い輝度のものが使用
される。一方、現状のプロジュクシヨンテレビの一層の
明るさの向上要望も根強く、その結果として自ずと、使
用する光源強度は益々強くなって来ている。[0003] In the case of a liquid crystal projection display, since polarizing plates and color filters are used in the liquid crystal image forming section, a large amount of light is absorbed by them, and it is difficult to produce images with a small area of 1 inch to 6 inches. 10 inches to 100
A reduction in brightness is unavoidable due to enlargement to a moderate level of several inches, and therefore a high-luminance light source is used as the light source. On the other hand, there is a deep-rooted desire to further improve the brightness of current projection televisions, and as a result, the intensity of the light source used has naturally become stronger.
【０００４】ところで、一般に液晶投射型ディスプレー
の液晶画像形成部に使用されている偏光板は沃素系偏光
板であるが、この種の偏光板は沃素が偏光子であるが故
に耐光性、耐熱性、耐湿熱性が十分でなく、実際の使用
に際して種々の問題が起きている。By the way, the polarizing plate generally used in the liquid crystal image forming part of a liquid crystal projection display is an iodine-based polarizing plate, but since this type of polarizing plate uses iodine as a polarizer, it has poor light resistance and heat resistance. , moisture and heat resistance is insufficient, and various problems occur during actual use.
【０００５】即ち強烈な光線により偏光子が化学分解す
る他、吸収された光エネルギーが熱エネルギーに変換さ
れ、偏光板の温度を上昇させ、その熱によっても偏光子
は劣化する。その結果として、偏光板の偏光率が低下す
ることにより、液晶表示体の電圧のＯＮ−ＯＦＦによる
コントラストが低下したり、偏光板の色相がニュトラル
グレーから褐色ないし赤色に変色することにより、カラ
ー液晶表示の鮮明な色相が損われるに至ることが多い。That is, in addition to chemically decomposing the polarizer due to intense light, the absorbed light energy is converted into thermal energy, increasing the temperature of the polarizing plate, and the polarizer is also deteriorated by the heat. As a result, the polarization rate of the polarizing plate decreases, resulting in a decrease in the contrast between ON and OFF voltages of the liquid crystal display, and the color change of the polarizing plate from neutral gray to brown or red. This often results in loss of the clear hue of the liquid crystal display.
【０００６】図１は一般的な液晶投射型ディスプレーの
基本的構成を表し、表１は各要素部品を光が透過または
反射する際の透過率または反射率を表したものである。
即ち図１においてメタルハライドランプ等の高輝度光源
から発せられた光は、レッド、グリーン、ブルーへの色
分解を行う光学系を経由してそれぞれ２枚の偏光板、液
晶セルより構成された３組の液晶画像形成部で画像を形
成し、該３組の画像は色合成系で一体化され、さらに投
射レンズて拡大され、スクリーンに像を表示せしめられ
るものである。FIG. 1 shows the basic configuration of a typical liquid crystal projection display, and Table 1 shows the transmittance or reflectance when light is transmitted or reflected through each element. In other words, in Figure 1, light emitted from a high-intensity light source such as a metal halide lamp passes through an optical system that separates the colors into red, green, and blue, and then passes through three sets each consisting of two polarizing plates and a liquid crystal cell. An image is formed by a liquid crystal image forming section, and the three sets of images are integrated by a color composition system, and further enlarged by a projection lens, and the image is displayed on a screen.
【０００７】[0007]
【０００８】各光学系の中で特に光の吸収による損失の
大きい光学要素は入射（光源）側偏光板と液晶セルの２
個所である。即ち、入射側偏光板に入った高エネルギー
の光の６０％は偏光板の偏光子によって吸収され、偏光
子の光化学的な分解反応を誘起させるばかりでなく、熱
エネルギーに変換され温度の上昇を招き、この高温と熱
的作用によっても偏光子の分解は促進されるものである
。In each optical system, the two optical elements that have a particularly large loss due to light absorption are the polarizing plate on the incident (light source) side and the liquid crystal cell.
It's a place. In other words, 60% of the high-energy light that enters the polarizing plate on the incident side is absorbed by the polarizer of the polarizing plate, which not only induces a photochemical decomposition reaction of the polarizer, but also is converted into thermal energy, causing a rise in temperature. This high temperature and thermal action also accelerate the decomposition of the polarizer.
【０００９】出射側（スクーリン側）偏光板は入射側偏
光板及び液晶セルにより大部分の光が吸収される為、入
射側偏光板より少ない光しか受光されず、光エネルギー
及び熱エネルギーによる劣化は比較的少ない。このよう
に液晶投射型ディスプレーに使用する偏光板は入射側、
出射側の何れに設けられる偏光板も優れた耐光性及び耐
熱性が要求されるが、少なくとも入射側偏光板について
は、これら耐久性の向上は必須な要件である。Since most of the light on the output side (screening side) polarizing plate is absorbed by the input side polarizing plate and the liquid crystal cell, less light is received than the input side polarizing plate, and there is no deterioration due to light energy and thermal energy. Relatively few. In this way, the polarizing plates used in liquid crystal projection displays are
Although the polarizing plates provided on either of the output sides are required to have excellent light resistance and heat resistance, improvement in these durability is an essential requirement at least for the polarizing plate on the input side.
【００１０】一方、これら耐久性向上の必要性の他に、
液晶投射型ディスプレーにおいて要求される特性は明る
さとコントラストであり、かくして、偏光板には高い偏
光率と同時に高い透過率を有することが必要である。On the other hand, in addition to the need to improve durability,
The characteristics required in a liquid crystal projection display are brightness and contrast, and thus the polarizing plate needs to have a high polarization rate as well as a high transmittance.
【００１１】[0011]
【発明が解決しようとする課題】強い光源を使用しても
、光線および熱による性能劣化の少ない液晶投射型ディ
スプレーの開発が望まれている。Problems to be Solved by the Invention There is a desire to develop a liquid crystal projection type display whose performance is less degraded by light and heat even when a strong light source is used.
【００１２】0012
【課題を解決するための手段】本発明者らは前記した様
な課題を解決すべく鋭意検討の結果、液晶投射型ディス
プレーに使用する単数または複数の液晶画像形成部の光
源側又は光源側とスクリーン側の両側に偏光板として単
体透過率３６％以上でかつ平均偏光率９９．０％以上の
染料系偏光板を採用することにより、前記課題が解決さ
れることを見い出し、本発明に至ったものである。[Means for Solving the Problems] As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have found that the light source side or the light source side of one or more liquid crystal image forming units used in a liquid crystal projection type display. We have discovered that the above problem can be solved by employing dye-based polarizing plates with a single transmittance of 36% or more and an average polarization rate of 99.0% or more as polarizing plates on both sides of the screen, and have arrived at the present invention. It is something.
【００１３】即ち本発明は単数又は複数の液晶画像形成
部を含む液晶投射型ディスプレーにおいて液晶の光源側
又は光源側とスクリーン側の両側に単体透過率が３６％
以上でかつ平均偏光率が９９．０％以上の染料系偏光板
を配置してなる液晶投射型ディスプレーを提供する。That is, the present invention provides a liquid crystal projection type display including one or more liquid crystal image forming sections, in which the single transmittance is 36% on the light source side of the liquid crystal, or on both sides of the light source side and the screen side.
A liquid crystal projection type display is provided in which a dye-based polarizing plate having the above properties and an average polarization ratio of 99.0% or more is arranged.
【００１４】本発明を詳細に説明する。本発明において
単体透過率が３６％以上でかつ平均偏光率が９９．０％
以上である染料系偏光板（染料系ハイコントラスト偏光
板）は例えば次のようにして製造される。最大吸収波長
で特に高い二色性を有する黄色、赤色、青色、緑色の染
料の配合組成物を含む染浴中にポリビニルアルコールフ
ィルムを浸漬した後、ホウ酸を含む水溶液中で一軸方向
に４〜５倍に自由幅一軸延伸し、水洗、乾燥して偏光膜
を得る。偏光膜のみで偏光機能は有するが、強烈な光線
照射、高温または高温高湿の苛酷な環境条件に対して十
分高い耐久性を付与する為に、紫外線吸収剤を含有する
トリアセチルセルロース等の支持フィルムを両面より積
層接着して偏光板とするのが好ましい。The present invention will be explained in detail. In the present invention, the single transmittance is 36% or more and the average polarization rate is 99.0%.
The dye-based polarizing plate (dye-based high contrast polarizing plate) described above is manufactured, for example, as follows. After immersing the polyvinyl alcohol film in a dyebath containing a blended composition of yellow, red, blue and green dyes with particularly high dichroism at the maximum absorption wavelength, it is uniaxially immersed in an aqueous solution containing boric acid for 4 to 40 minutes. The free width is uniaxially stretched 5 times, washed with water, and dried to obtain a polarizing film. The polarizing film alone has a polarizing function, but in order to provide sufficiently high durability against harsh environmental conditions such as intense light irradiation, high temperature, and high temperature and high humidity, a support such as triacetyl cellulose containing an ultraviolet absorber is used. Preferably, the films are laminated and bonded from both sides to form a polarizing plate.
【００１５】単体透過率が３６％以上でかつ平均偏光率
が９９．０％以上である染料系偏光板（染料系ハイコン
トラスト偏光板）の一例としてはＳＧ−９、ＫＰＬ−Ｔ
−１３Ｕ、ＫＰＬ−Ｔ−１４Ｕ、ＳＧ−９−３８（いず
れもカヤポーラー（株）製）等が挙げられるが、その１
例の光学特性、耐久性能を市販の沃素系ハイコントラス
ト偏光板Ａおよび市販の従来の染料系偏光板Ｂと対比し
て表２に示す。Examples of dye-based polarizing plates (dye-based high contrast polarizing plates) having a single transmittance of 36% or more and an average polarization rate of 99.0% or more include SG-9 and KPL-T.
-13U, KPL-T-14U, SG-9-38 (all manufactured by Kaya Polar Co., Ltd.), etc.
The optical properties and durability of the examples are shown in Table 2 in comparison with a commercially available iodine-based high contrast polarizing plate A and a commercially available conventional dye-based polarizing plate B.
【００１６】
＊１ 耐久試験
（１）６３℃カーボンアーク１０００時間照射（２）１
００℃乾熱 １０００時間処理*1 Durability test (1) 63°C carbon arc irradiation for 1000 hours (2) 1
00℃ dry heat treatment for 1000 hours
【００１７】ここでＸ
、Ｙ、ＺはそれぞれＣ光源での視感補正の単体、平行位
、直交位透過率を表しρは[0017] Here, X
, Y, and Z are the single, parallel, and orthogonal transmittances of luminous correction with C light source, respectively, and ρ is
【００１８】
で計算される平均偏光率を表し、（Ｐ）、（Ｃ）は平行
位、直交位の色相変化を表すものである。[0018] It represents the average polarization rate calculated by , and (P) and (C) represent hue changes in parallel and orthogonal positions.
【００１９】従来の染料系偏光板は、偏光率が低く、し
かも透過率が低いが故に液晶投射型ディスプレーには全
く使用出来る性能ではなかったが、染料系、ハイコント
ラスト偏光板の高い透過率、偏光率特性の実現によって
、ディスプレー分野へも使用可能な水準となった。Conventional dye-based polarizing plates had a low polarization rate and low transmittance, so they could not be used at all for liquid crystal projection displays. However, dye-based, high-contrast polarizing plates have high transmittance, The realization of polarization characteristics has brought it to a level where it can also be used in the display field.
【００２０】本発明の液晶投射型ディスプレーへ使用可
能な偏光板の光学性能は単体透過率が３６％以上の明る
さを有し、かつ、平均偏光率が９９．０％以上の性能を
有することが必要であり、単体偏光率が３６％より低い
と表示画面が暗くなり、又平均偏光率が９９．０％より
低い場合には画像のコントラストが悪くなる。好ましく
は単体透過率が３８％以上でかつ平均偏光率９９．９％
以上の性能が要求され、さらに好ましくは単体透過率が
３９％以上でかつ平均偏光率が９９．９６％以上の性能
を有するものである。The optical performance of the polarizing plate that can be used in the liquid crystal projection display of the present invention is that it has a brightness with a single transmittance of 36% or more and an average polarization rate of 99.0% or more. If the single polarization rate is lower than 36%, the display screen will become dark, and if the average polarization rate is lower than 99.0%, the contrast of the image will deteriorate. Preferably, the single transmittance is 38% or more and the average polarization rate is 99.9%.
The above performance is required, and more preferably a single transmittance of 39% or more and an average polarization ratio of 99.96% or more.
【００２１】[0021]
【実施例】次に実施例により本発明をさらに具体的に説
明する。
実施例１
カヤポーラー（株）製、染料系ハイコントラスト偏光板
ＳＧ−９−３８と市販の沃素系ハイコントラスト偏光板
Ａ（表２にその性能、耐久性を示す。）をはり合わせて
テストピースを作成した。このものの光学特性を表３に
示した。（Ａ欄）このテストピースについて入射側（光
源側）が、染料系ハイコントラスト偏光板（ＳＧ−９−
３８）に、又、出射側が沃素系ハイコントラスト偏光板
Ａになるように超耐光テスト（条件：カーボンアーク、
放電電圧、２１６０Ｗ、放電点からの距離１４０ｍｍ、
テストピース表面温度９５℃、１００時間暴露）を実施
した。その結果を表３に示した。（Ｂ欄）EXAMPLES Next, the present invention will be explained in more detail with reference to Examples. Example 1 A test piece was made by gluing together a dye-based high-contrast polarizing plate SG-9-38 manufactured by Kaya Polar Co., Ltd. and a commercially available iodine-based high-contrast polarizing plate A (its performance and durability are shown in Table 2). Created. The optical properties of this product are shown in Table 3. (Column A) For this test piece, the incident side (light source side) is a dye-based high contrast polarizing plate (SG-9-
38), and super light fastness test (conditions: carbon arc,
Discharge voltage, 2160W, distance from the discharge point 140mm,
The test piece surface temperature was 95° C. and the test piece was exposed for 100 hours. The results are shown in Table 3. (Column B)
【００２２】
透過率、偏光率特性は、沃素系偏光板２枚使用の場合（
後述比較例１）に匹敵する性能を有し、かつ超耐光性テ
ストにおいても平均偏光率の低下、色相の変化等の性能
劣化はほとんどなかった。[0022]
The transmittance and polarization characteristics are as follows when using two iodine-based polarizing plates (
It had performance comparable to Comparative Example 1) described below, and there was almost no performance deterioration such as a decrease in average polarization index or a change in hue even in the super lightfastness test.
【００２３】又液晶セルの光源側（入射側）にＳＧ−９
−３８を、スクリーン側（出射側）に沃素系ハイコント
ラスト偏光板を貼りつけたＲ、Ｇ、Ｂ用の３枚の液晶パ
ネルを作製し、液晶投射型ディスプレーを構成した。光
源として２５０Ｗメタルハライドランプの長時間の光照
射を行ったが、明るさの変化、コントラストの低下の少
ない高信頼性の液晶投射型ディスプレーであることが確
認された。[0023] Also, SG-9 is placed on the light source side (incident side) of the liquid crystal cell.
-38, three liquid crystal panels for R, G, and B were fabricated with an iodine-based high contrast polarizing plate attached to the screen side (output side), and a liquid crystal projection type display was constructed. A 250W metal halide lamp was used as a light source for long-term light irradiation, and it was confirmed that this was a highly reliable liquid crystal projection display with little change in brightness or decrease in contrast.
【００２４】実施例２
偏光板として染料系ハイコントラスト偏光板ＳＧ−９−
３８ ２枚を組み合せた場合の光学特性の測定と超耐
光性テストを実施例１と同様な方法で実施し、その結果
を表３に表す。明るさ、コントラストは沃素系ハイコン
トラスト偏光板２枚使用した場合よりは少し劣るが、超
耐光性テストにおいては、偏光率の低下、色相の変化は
ほとんどなかった。また、この偏光板を液晶セルの両側
に貼り合せた液晶パネルより構成された液晶投射型ディ
スプレーは強烈なメタルハイランドランプによって長時
間照射されても高い信頼性を示した。Example 2 Dye-based high contrast polarizing plate SG-9- as a polarizing plate
Measurement of optical properties and super light resistance test when two 38 sheets were combined were carried out in the same manner as in Example 1, and the results are shown in Table 3. Although the brightness and contrast were slightly inferior to those using two iodine-based high-contrast polarizing plates, there was almost no decrease in polarization rate or change in hue in the super lightfastness test. Furthermore, a liquid crystal projection display constructed from a liquid crystal panel with polarizing plates bonded to both sides of a liquid crystal cell showed high reliability even when exposed to intense metal highland lamps for long periods of time.
【００２５】比較例１
偏光板として２枚の沃素系ハイコントラスト偏光板Ａを
組み合せた場合の光学特性の測定および超耐光性テスト
と実施例１と同様な方法で実施し、その結果を表３に表
す。光学特性は優れた性能を有するが、超耐光性テスト
後の入射側偏光板は部分的に著しく褐変し、２枚の偏光
板のクロスニコル色はニュートラルグレーから赤色に変
化していた。Comparative Example 1 Measurement of optical properties and super light fastness test when two iodine-based high contrast polarizing plates A were combined as polarizing plates were carried out in the same manner as in Example 1, and the results are shown in Table 3. Expressed in Although the optical properties were excellent, after the ultra-lightfastness test, the incident-side polarizing plate was partially browned significantly, and the crossed nicol color of the two polarizing plates changed from neutral gray to red.
【００２６】またこの偏光板を使った液晶投射型ディス
プレーのメタルハライドランプ照射下での信頼性は実施
例１、２の場合よりかなり劣り、強い光源の照射された
部分が斑状に褐変し、この部分のコントラスト及び色調
の鮮明さが失われていた。Furthermore, the reliability of the liquid crystal projection display using this polarizing plate under metal halide lamp irradiation was considerably inferior to that of Examples 1 and 2, and the areas irradiated by the strong light source turned brown in a patchy manner. The contrast and sharpness of color tone were lost.
【００２７】
＊１ Ｘ：平行位透過率、Ｙ：直交位透過率、ρ：平
均偏光率
＊２ ＣＲは偏光板のコントラスト比でＸ／Ｙで計算
される。
＊３ 超耐光性テストの条件
カーボンアーク、２１６０Ｗ放電／１４０ｍｍポイント
９５℃、１００時間照射*1 X: Parallel transmittance, Y: Orthogonal transmittance, ρ: Average polarization rate *2 CR is the contrast ratio of a polarizing plate and is calculated as X/Y. *3 Conditions for super light resistance test Carbon arc, 2160W discharge/140mm point 95℃, irradiation for 100 hours
【００２８】[0028]
【発明の効果】強烈な光源の長時間照射によってもコン
トラストの低下しない高信頼性の液晶投射型ディスプレ
ーを製作することが出来た。[Effects of the Invention] It was possible to manufacture a highly reliable liquid crystal projection type display whose contrast does not deteriorate even when irradiated with an intense light source for a long time.
【図１】 液晶投射型ディスプレーの基本構成を示す
図である。FIG. 1 is a diagram showing the basic configuration of a liquid crystal projection display.
１．光源
２．集光レンズ
３．色分解光学系（ダイクロイックミラー）４．液晶パ
ネル（Ｒ、Ｇ、Ｂの３組よりなる）５．入射側偏光板
６．液晶セル
７．出射側偏光板
８．色合成光学系（ダイクロイックプリズム）９．投射
レンズ
１０．スクリーン1. Light source 2. Condensing lens 3. Color separation optical system (dichroic mirror) 4. Liquid crystal panel (consisting of 3 sets of R, G, and B)5. Incident side polarizing plate 6. Liquid crystal cell7. Output side polarizing plate 8. Color synthesis optical system (dichroic prism)9. Projection lens 10. screen
Claims (1)
む液晶投射型ディスプレーにおいて液晶の光源側又は光
源側とスクリーン側の両方に単体透過率が３６％以上で
かつ平均偏光率が９９．０％以上である染料系偏光板を
配置してなる液晶投射型ディスプレー。Claim 1: In a liquid crystal projection type display including one or more liquid crystal image forming sections, the light source side of the liquid crystal or both the light source side and the screen side have a single transmittance of 36% or more and an average polarization rate of 99.0%. A liquid crystal projection type display in which the above dye-based polarizing plate is arranged.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3031469A JPH04247404A (en) | 1991-02-01 | 1991-02-01 | Liquid crystal projection type display |
| JP10214130A JPH11125815A (en) | 1991-02-01 | 1998-07-29 | Liquid crystal projection type display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3031469A JPH04247404A (en) | 1991-02-01 | 1991-02-01 | Liquid crystal projection type display |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8179866A Division JPH0922008A (en) | 1996-06-21 | 1996-06-21 | Liquid crystal projection type display |
| JP8179867A Division JPH0922009A (en) | 1996-06-21 | 1996-06-21 | Liquid crystal projection type display |
| JP10214130A Division JPH11125815A (en) | 1991-02-01 | 1998-07-29 | Liquid crystal projection type display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04247404A true JPH04247404A (en) | 1992-09-03 |
Family
ID=12332124
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3031469A Pending JPH04247404A (en) | 1991-02-01 | 1991-02-01 | Liquid crystal projection type display |
| JP10214130A Pending JPH11125815A (en) | 1991-02-01 | 1998-07-29 | Liquid crystal projection type display |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10214130A Pending JPH11125815A (en) | 1991-02-01 | 1998-07-29 | Liquid crystal projection type display |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPH04247404A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6790490B1 (en) | 1999-07-14 | 2004-09-14 | Nippon Kayaku Kabushiki Kaisha | Dye type polarizing plate |
| KR100763113B1 (en) * | 2001-09-28 | 2007-10-04 | 닛토덴코 가부시키가이샤 | Method for manufacturing polarization plate and liquid crystal display device having the polarization plate |
-
1991
- 1991-02-01 JP JP3031469A patent/JPH04247404A/en active Pending
-
1998
- 1998-07-29 JP JP10214130A patent/JPH11125815A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11125815A (en) | 1999-05-11 |
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