JPH03156420A - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JPH03156420A JPH03156420A JP1295038A JP29503889A JPH03156420A JP H03156420 A JPH03156420 A JP H03156420A JP 1295038 A JP1295038 A JP 1295038A JP 29503889 A JP29503889 A JP 29503889A JP H03156420 A JPH03156420 A JP H03156420A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- plate
- polarizer
- light
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 72
- 239000011521 glass Substances 0.000 claims abstract description 46
- 230000003287 optical effect Effects 0.000 claims abstract description 45
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000012780 transparent material Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 230000006866 deterioration Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 18
- 238000005286 illumination Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000011651 chromium Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は透過型の液晶ディスプレイに係り、とくに表示
面における外部入射光の反射を抑制し、表示画質の劣化
の防止に好適な液晶表示素子に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transmissive liquid crystal display, and in particular to a liquid crystal display element suitable for suppressing reflection of externally incident light on a display surface and preventing deterioration of display image quality. Regarding.
従来のアクティブマトリク入方式の透過型液晶表示素子
２を用いた液晶ディスプレイの構成を第２図に示す、即
ち、第一の硝子板８の外側表面に検光子２２を固着し、
第一の硝子板８の内側裏面に複数の開口部２８を有する
全屈で形成した制光子９を固着し、該制光子９の開口部
２８にカラーフィルター１０を固着して第一層を形成し
、制光子９とカラーフィルター１０との上、全面に透明
電極１１を第二層として形成し、透明電極１１の上に配
向制御膜１３を第三層として形成している。また、第二
の硝子板１７の外側表面に偏光子１８を固着し、第二の
硝子板１７の内側裏面には画素電極１６を形成している
。画素電極１６の一隅にはＴＦＴ （Ｔｈｉｎ Ｆｉ
ｌｍ 工ｒａｎｓｉｓｔｏｒ）（図示せず）が形成さ
れており１画素電極１６のスイッチングをしている。画
素電極１６の上には第二層として配向制御膜１５が形成
されている。The configuration of a liquid crystal display using a conventional active matrix transmissive liquid crystal display element 2 is shown in FIG.
A light control element 9 formed by fully bending and having a plurality of openings 28 is fixed to the inner back surface of the first glass plate 8, and a color filter 10 is fixed to the openings 28 of the light control element 9 to form a first layer. A transparent electrode 11 is formed as a second layer on the entire surface of the light control element 9 and color filter 10, and an alignment control film 13 is formed as a third layer on the transparent electrode 11. Further, a polarizer 18 is fixed to the outer surface of the second glass plate 17, and a pixel electrode 16 is formed on the inner back surface of the second glass plate 17. At one corner of the pixel electrode 16, a TFT (Thin Fi
1m transistor (not shown) is formed to switch one pixel electrode 16. An alignment control film 15 is formed as a second layer on the pixel electrode 16.
そして、配向制御膜１３と、配向制御膜１５との間に液
晶１４を封止して液晶表示素子２を構成している。そし
て、液晶表示素子２の前面に空隙７をおいて透明な保護
板２１を配し、偏光子１８の外側より照明光１９を照射
して、カラーフィルター１０を通過してくる表示光２０
を見ている。Then, the liquid crystal 14 is sealed between the alignment control film 13 and the alignment control film 15 to form the liquid crystal display element 2. Then, a transparent protection plate 21 is arranged with a gap 7 in front of the liquid crystal display element 2, illumination light 19 is irradiated from the outside of the polarizer 18, and display light 20 passes through the color filter 10.
looking at
液晶１４はネマティック液晶であり、配向制御膜１３と
配向制御膜１５とは液晶分子を特定方向に並べる（配向
させる）働きをする。配向制御膜１３と配向制御膜１５
とを９０°ねじることにより、偏光の主軸を９０°回転
させる。The liquid crystal 14 is a nematic liquid crystal, and the alignment control film 13 and the alignment control film 15 function to align (orient) liquid crystal molecules in a specific direction. Orientation control film 13 and orientation control film 15
By twisting 90 degrees, the main axis of polarization is rotated 90 degrees.
また検光子２２と偏光子１８は光学主軸が互いに９０’
ずれた偏光板で、それぞれの光学主軸の方向を配向制御
膜１３と配向制御膜１５の配向方向に一致させている。Further, the optical principal axes of the analyzer 22 and the polarizer 18 are 90' from each other.
With the shifted polarizing plates, the directions of their respective principal optical axes are made to match the orientation directions of the alignment control films 13 and 15.
したがって、液晶１４に電圧が無印加のときは、照明光
１９は液晶表示素子２を通過できるが、液晶１４に電圧
が印加されると、液晶分子が第一の硝子板８と第二の硝
子板１７とに垂直に立つため、液晶１４の旋光性が失わ
れ、その結果照明光１９は液晶表示素子２を通過できな
い。Therefore, when no voltage is applied to the liquid crystal 14, the illumination light 19 can pass through the liquid crystal display element 2, but when a voltage is applied to the liquid crystal 14, the liquid crystal molecules move between the first glass plate 8 and the second glass plate. Since it stands perpendicular to the plate 17, the optical rotation of the liquid crystal 14 is lost, and as a result, the illumination light 19 cannot pass through the liquid crystal display element 2.
制光子９は金属、主にクロム（Ｃｒ）をスパッタして形
成している。金属を材料にしている理由は二つあり、一
つはカラーフィルター１０の混色を防止してコントラス
トを向上させるためであり、二つ目は外部入射光による
ＴＰＴの誤動作防止である。制光子９及びカラーフィル
ター１０の製法については、特開平１−１５０１０２号
公報に開示されている。特に、制光子９については、「
約１ｍｍ厚のガラス基板に２０００人の膜厚でクロムを
スパッタリング形成した後、フォトリソグラフィ法によ
り格子状にパターニングした」と、記載されている。The light control element 9 is formed by sputtering metal, mainly chromium (Cr). There are two reasons why metal is used as the material. One is to prevent color mixing in the color filter 10 and improve contrast, and the second is to prevent malfunction of the TPT due to external incident light. The manufacturing method of the light control element 9 and the color filter 10 is disclosed in Japanese Patent Application Laid-Open No. 1-150102. In particular, regarding the photocontroller 9,
Chromium was sputtered to a thickness of 2,000 layers on a glass substrate approximately 1 mm thick, and then patterned into a lattice shape using photolithography.''
上記液晶ディスプレイは保護板１の外側表面より大尉す
る外部入射光２３が保護板１の表面及び裏面、検光子２
２の表面、及び制光子９で反射して反射光２４．２５．
２６．２７を発生している。したがって、表示光２ｏに
反射光２４．２５．２６，２７が重畳して、表示光２゜
の表示内容を著しく劣化させている。In the above liquid crystal display, the external incident light 23 emitted from the outer surface of the protective plate 1 is transmitted to the front and back surfaces of the protective plate 1 and the analyzer 2.
2 and the light control element 9, reflected light 24.25.
26.27 is occurring. Therefore, the reflected lights 24, 25, 26, and 27 are superimposed on the display light 2o, significantly deteriorating the display content of the display light 2°.
また、第３図は、第２図で示した上記液晶表示素子２の
上面図である。制光子９とカラーフィルター１０を示す
。カラーフィルター１０は上第一列目左より、Ｇ２９、
Ｒ３０，Ｂ３１、Ｇ２９、・・・の順に並べられている
。第二列目は１．５画素ずれてＧ２９、Ｒ３０，Ｂ３１
、Ｇ２９、・・・の順に並べられている。第三列目以下
奇数列目は、第一列目と同じ配列に並べられている。第
四列目以下偶数列目は第二列目と同じ配列に並べられて
いる。したがって、カラーフィルター１０の奇数列目の
０３０．Ｒ３１と、偶数列目のＢ２９とで逆三角形のト
ライアングル配置であり、Ｇ３０．Ｒ３１，Ｂ２９の濃
淡で輝度と色度とを表現している。また、カラーフィル
ター１０が配置されている開口部は、奇数列目と偶数列
目とは０．５画素ずれて配置されている。制光子９の開
口率は４０〜６０％であり、したがって、制光子９は多
数の穴の開いた金属製の鏡であった。検光子２２の光透
過率は２０〜５０％であり、クロム（Ｃｒ）の反射率は
略６０％である。検光子２２で減光されたとしても、反
射光２７は少なくとも１２％以上であり、表面反射防止
処理を施していない保護板２１の表面反射率略４％の３
倍以上である。Further, FIG. 3 is a top view of the liquid crystal display element 2 shown in FIG. 2. A light control element 9 and a color filter 10 are shown. Color filters 10 are from the left in the top first row: G29;
They are arranged in the order of R30, B31, G29, . . . The second row is G29, R30, B31 with a 1.5 pixel shift
, G29, . . . The third and subsequent odd-numbered columns are arranged in the same arrangement as the first column. The fourth and subsequent even-numbered columns are arranged in the same arrangement as the second column. Therefore, 030. R31 and B29 in the even-numbered row are arranged in an inverted triangle, and G30. Brightness and chromaticity are expressed by the gradations of R31 and B29. Furthermore, the openings in which the color filters 10 are arranged are arranged with a 0.5 pixel shift between the odd-numbered rows and the even-numbered rows. The aperture ratio of the light control element 9 was 40 to 60%, and therefore the light control element 9 was a metal mirror with many holes. The light transmittance of the analyzer 22 is 20 to 50%, and the reflectance of chromium (Cr) is approximately 60%. Even if the light is attenuated by the analyzer 22, the reflected light 27 is at least 12% or more, and the surface reflectance of the protection plate 21 which has not been subjected to surface anti-reflection treatment is approximately 4%.
That's more than double that.
したがって、液晶表示素子２の内部からの表示光２０に
、保護板１の表面及び裏面、検光子２２の表面、及び制
光子９での外部入射光２３の反射光２４．２５．２６，
２７が重畳して、上記表示光２０の表示内容を劣化させ
ている。特に、鏡状の制光子９で反射した反射光２７は
大きく、表示光２０の表示内容を著しく劣化させている
。Therefore, in the display light 20 from inside the liquid crystal display element 2, reflected light 24, 25, 26,
27 are superimposed, deteriorating the display content of the display light 20. In particular, the reflected light 27 reflected by the mirror-like light control element 9 is large and significantly deteriorates the display content of the display light 20.
一方、ディスプレイ画面での表面反射を防止する方法と
しては、従来、第４図に示す光学フィルター４８が使用
されている。即ち、この光学フィルター４８は、表面に
表面反射防止膜３を形成した透明保護板４の裏面に偏光
子５と、１／４波長板６とが密着されて構成されている
ものである。偏光子５の光学主軸と１７４波長板６の光
学主軸とは４５°傾けて貼り合わされている。したがっ
て、偏光子５を通過した直線偏光は、１／４波長板６を
通過することによって円偏光に変えられる。このフィル
ター４８をＶＤＴ （Ｖｉ ｄ ｅ ｏ 旦１ｓｐｌ
ａｙ Ｔｅｒｍｉｎａｌ）画面３２の前面に配置する
。外部入射光２３は自然光１．ま・たはそれに近い光で
あるので、光に偏りが無い。外部入射光２３は透明板４
を通過するとき透明板４の表面で表面反射を生ずるが、
表面反射防止膜３が形成されているので、その反射率は
略１％程度である。透明板４を通過した外部入射光２３
の内、偏光子５を通過できる光は直線偏光３３のみであ
る。On the other hand, as a method for preventing surface reflection on a display screen, an optical filter 48 shown in FIG. 4 has been conventionally used. That is, this optical filter 48 is constructed by having a polarizer 5 and a quarter wavelength plate 6 closely attached to the back surface of a transparent protective plate 4 on which a front antireflection film 3 is formed. The optical principal axis of the polarizer 5 and the optical principal axis of the 174-wave plate 6 are attached to each other with an angle of 45 degrees. Therefore, the linearly polarized light that has passed through the polarizer 5 is changed into circularly polarized light by passing through the quarter-wave plate 6. This filter 48 is
ay Terminal) is placed in front of the screen 32. The external incident light 23 is natural light 1. Since the light is close to that, there is no bias in the light. External incident light 23 is transmitted through transparent plate 4
When passing through, surface reflection occurs on the surface of the transparent plate 4, but
Since the surface antireflection film 3 is formed, its reflectance is about 1%. External incident light 23 passing through the transparent plate 4
Of these, only the linearly polarized light 33 can pass through the polarizer 5.
この直線偏光３３が１／４波長板６を通過すると円偏光
３４に変換される０円偏光３４はＶＤＴ画面３２に反射
する。反射は位相を１８０”移動させる動作であるから
、円偏光３４は逆回りの円偏光３５となる。逆回りの円
偏光３５が再度１／４波長板６を通過すると直線偏光３
６となる。直線偏光３６は直線偏光３３とは光学主軸が
９０’異なる。したがって、直線偏光３６の光学主軸は
偏光子５の光学主軸とは直交しているので、直線偏光３
６は偏光子５を通過できない。ゆえに、光学フィルター
４８は外部入射光２３のＶＤＴ画面３２における表面反
射を防止できる。なお、偏光については、小瀬他編、光
工学ハンドブック、 ｐｐ、４１１〜４２７、朝倉書店
刊、に詳述されている。特に、１７４波長板は移相子と
よばれ、同書のｐｐ、５２５に詳述されている。また、
１／４波長板の製法については、特開昭６３−１６７３
０４号公報及び。When this linearly polarized light 33 passes through the quarter-wave plate 6 , it is converted into circularly polarized light 34 , and the zero circularly polarized light 34 is reflected on the VDT screen 32 . Since reflection is an operation that shifts the phase by 180", the circularly polarized light 34 becomes reversely circularly polarized light 35. When the reversely circularly polarized light 35 passes through the quarter-wave plate 6 again, it becomes linearly polarized light 3.
It becomes 6. The linearly polarized light 36 differs from the linearly polarized light 33 in optical principal axis by 90'. Therefore, since the optical principal axis of the linearly polarized light 36 is orthogonal to the optical principal axis of the polarizer 5, the linearly polarized light 36
6 cannot pass through the polarizer 5. Therefore, the optical filter 48 can prevent surface reflection of the externally incident light 23 on the VDT screen 32. Note that polarization is described in detail in Kose et al., eds., Optical Engineering Handbook, pp. 411-427, published by Asakura Shoten. In particular, the 174 wavelength plate is called a retarder, and is detailed in pp. 525 of the same book. Also,
Regarding the manufacturing method of 1/4 wavelength plate, please refer to Japanese Patent Application Laid-Open No. 1673-1983.
Publication No. 04 and.
特開平１−１１８８０５号公報に開示されている。It is disclosed in Japanese Patent Application Laid-Open No. 1-118805.
上記光学フィルター４８を従来の液晶ディスプレイの前
面に配置すると、光学フィルター４８と保護板２１とが
重なり、液晶ディスプレイの厚みが増すという問題があ
る。If the optical filter 48 is placed in front of a conventional liquid crystal display, there is a problem that the optical filter 48 and the protection plate 21 overlap, increasing the thickness of the liquid crystal display.
本発明の目的は、上記従来技術における問題点を解決し
、液晶表示面における反射を防止し、反射光２４．２５
．２６．２７による表示内容の劣化を抑えた液晶ディス
プレイを提供することにある。An object of the present invention is to solve the problems in the prior art described above, to prevent reflection on the liquid crystal display surface, and to prevent the reflected light from 24.25
．． An object of the present invention is to provide a liquid crystal display that suppresses deterioration of display contents due to 26.27.
上記課題を解決するために、本発明では保護板２゛１の
代りに光学フィルター４８を設けた。In order to solve the above problems, in the present invention, an optical filter 48 is provided in place of the protective plate 2'1.
また、保護板２１の代りに光学フィルター４８を設け、
検光子２２を取り除き、制光子９と液晶１４との間に／
４波長板１１を挿置した。Moreover, an optical filter 48 is provided instead of the protection plate 21,
The analyzer 22 is removed and a /
A four-wavelength plate 11 was inserted.
また、第一の硝子８と制光子９との間に、制光子９の開
口部と同位置、同寸法、同形状の開口部４７を有する１
／４波長板４６を設けた。Further, between the first glass 8 and the light control element 9, an opening 47 having the same position, the same size, and the same shape as the opening of the light control element 9 is provided.
A /4 wavelength plate 46 was provided.
透明板４は機械的な外部圧力を担うため、ｍｍ単位の厚
みが必要である。一方、偏光子５と１／４波長抜６とは
それぞれミクロン（μｍ）単位の厚みであり、透明板４
に密着しても保護板ｌとしての合成厚みに大きな変化は
無い。したがって、保護板１は保護板２１と厚みにおい
て差が少ないため、保護板２１の代りとして用いること
ができる。Since the transparent plate 4 bears mechanical external pressure, it needs to have a thickness on the order of mm. On the other hand, the polarizer 5 and the quarter wavelength filter 6 each have a thickness in microns (μm), and the transparent plate 4
There is no major change in the composite thickness of the protective plate l even if it is closely attached to the protective plate l. Therefore, since the protection plate 1 has little difference in thickness from the protection plate 21, it can be used in place of the protection plate 21.
外部入射光２３は偏光子５で直線偏光３３となり、１／
４波長板６を通過して円偏光３４に変換される。１／４
波長板６と制光子９の間には第一の硝子８のみが存在す
る。一般に、硝子は光学的に等方的である。したがって
、前述の第４図で説明したように、制光子９の表面で反
射された光３５は逆回りの円偏光となるため、偏光子５
でブロックされて外部に出てくることができない。一方
、液晶１４を通過してくる内部表示光１９は、１７４波
長板１１ともう一つの１／４波長板６で１／２波長板を
構成し、偏光の進相軸と遅相軸との位相差を１８０°と
するものである。したがって、偏光の光学主軸を９０’
回転するので、偏光子５の光学主軸は偏光子１８の光学
主軸と同一方向に揃えておけばよい。Externally incident light 23 becomes linearly polarized light 33 by polarizer 5, and becomes 1/
The light passes through a four-wavelength plate 6 and is converted into circularly polarized light 34. 1/4
Only the first glass 8 is present between the wave plate 6 and the light control element 9. Generally, glass is optically isotropic. Therefore, as explained above with reference to FIG.
It is blocked and cannot come out. On the other hand, the internal display light 19 passing through the liquid crystal 14 constitutes a 1/2 wavelength plate with the 174 wavelength plate 11 and another 1/4 wavelength plate 6, and the fast axis and slow axis of the polarized light are The phase difference is 180°. Therefore, the optical principal axis of polarization is set at 90'
Since it rotates, the optical principal axis of the polarizer 5 may be aligned in the same direction as the optical principal axis of the polarizer 18.
また、制光子９と第一の硝子板８との間に形成した１７
４波長板４６は、制光子９の開口部２８と同位置、同寸
法、同形状の開口部４７を有するので、液晶１４を通過
してくる照明光１９に対して制光子９で蔽われている。In addition, 17 formed between the light control element 9 and the first glass plate 8
Since the four-wavelength plate 46 has an opening 47 having the same position, size, and shape as the opening 28 of the light control element 9, the illumination light 19 passing through the liquid crystal 14 is blocked by the light control element 9. There is.
したがって、１／４波長板４６は照明光１９に影響をお
よぼさない。一方、外部入射光２３は検光子２２を通過
して直線偏光３３に成り、１／４波長板４６を通過して
円偏光３４になる。円偏光３４は制光子９で反射して位
相が１８０゜回転して逆回転の円偏光３５に成る。円偏
光３５は１／４波長板４６を通過すると直線偏光３３と
は９０’ねじれた直線偏光３６になるため、検光子２２
を通過できない。Therefore, the quarter-wave plate 46 does not affect the illumination light 19. On the other hand, the externally incident light 23 passes through the analyzer 22 and becomes linearly polarized light 33, and passes through the 1/4 wavelength plate 46 and becomes circularly polarized light 34. The circularly polarized light 34 is reflected by the light control element 9, and the phase thereof is rotated by 180 degrees to become circularly polarized light 35 of opposite rotation. When the circularly polarized light 35 passes through the 1/4 wavelength plate 46, it becomes a linearly polarized light 36 which is twisted by 90' from the linearly polarized light 33.
cannot pass through.
以下、本発明の実施例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.
第１図は本発明の第一の実施例であり、アクティブマト
リクス方式の透過型液晶表示素子２と保護板１とで構成
された液晶ディスプレイの断面図を示す。保護板１の構
成は、透明板４の表面に表面反射防止膜３を形成し、透
明板４の裏面には偏光子５及び１／４波長板６を固着し
た。液晶表示素子２の構成は、第一の硝子板８の内側裏
面に複数の開口部２８を有する金属で形成した制光子９
を固着し、該制光子９の開口部２８にカラーフィルター
１０を固着して第一層を形成し、制光子９とカラーフィ
ルター１０との上、全面に、１／４波長板１１を第二層
として形成し、１／４波長板１１の上に透明電極１２を
第三層として形成し、透明電極１２の上に配向制御膜１
３を第四層として形成している。FIG. 1 is a first embodiment of the present invention, and shows a cross-sectional view of a liquid crystal display composed of an active matrix type transmission type liquid crystal display element 2 and a protection plate 1. As shown in FIG. The structure of the protection plate 1 is such that a front antireflection film 3 is formed on the surface of a transparent plate 4, and a polarizer 5 and a quarter wavelength plate 6 are fixed to the back surface of the transparent plate 4. The structure of the liquid crystal display element 2 includes a light control element 9 made of metal and having a plurality of openings 28 on the inner back surface of a first glass plate 8.
A color filter 10 is fixed to the opening 28 of the light control element 9 to form a first layer, and a quarter wavelength plate 11 is placed on the entire surface of the light control element 9 and the color filter 10 as a second layer. A transparent electrode 12 is formed as a third layer on the quarter wavelength plate 11, and an alignment control film 1 is formed on the transparent electrode 12.
3 is formed as the fourth layer.
また、第二の硝子板１７の外側表面に偏光子１８を固着
し、第二の硝子板１７の内側裏面には画素電極１６を形
成している。画素電極１６の上には第二層として配向制
御膜１５が形成されている。そして、上記配向制御膜１
３と、上記配向制御膜１５との間に液晶１４を封止して
液晶表示素子２を構成している。そして、第二の硝子板
１７の外側より照明光１９を照射して、カラーフィルタ
ー１０を通過してくる表示光２０を見ている。Further, a polarizer 18 is fixed to the outer surface of the second glass plate 17, and a pixel electrode 16 is formed on the inner back surface of the second glass plate 17. An alignment control film 15 is formed as a second layer on the pixel electrode 16. Then, the alignment control film 1
3 and the alignment control film 15, the liquid crystal 14 is sealed to constitute the liquid crystal display element 2. Then, illumination light 19 is irradiated from the outside of the second glass plate 17, and display light 20 passing through the color filter 10 is viewed.
第７図は、第１図における構成の動作説明図である。外
部入射光２３は偏光子５で直線偏光３３となり、１／４
波長板６を通過して円偏光３４に変換される。１／４波
長板６と制光子９の間には第一の硝子８のみが存在する
。一般に、硝子は光学的に等方的である。したがって、
第４図の従来例で説明したように、制光子９の表面で反
射された光３５は逆回りの円偏光となり。FIG. 7 is an explanatory diagram of the operation of the configuration in FIG. 1. The external incident light 23 becomes linearly polarized light 33 by the polarizer 5, which is 1/4
The light passes through the wave plate 6 and is converted into circularly polarized light 34. Only the first glass 8 is present between the quarter-wave plate 6 and the light control element 9. Generally, glass is optically isotropic. therefore,
As explained in the conventional example shown in FIG. 4, the light 35 reflected on the surface of the light control element 9 becomes circularly polarized light in the opposite direction.
１／４波長板６を通過して直線偏光３３とは光学主軸が
９０’捩じれた直線偏光３６となる。The linearly polarized light 33 that passes through the quarter-wave plate 6 becomes linearly polarized light 36 whose optical principal axis is twisted by 90'.
直線偏光３６は偏光子５とその光学主軸が９０°捩じれ
ているため、偏光子５でブロックされて外部に出てくる
ことができない。Since the polarizer 5 and its optical principal axis are twisted by 90 degrees, the linearly polarized light 36 is blocked by the polarizer 5 and cannot come out.
一方、偏光子１８の背後から照射された照明光１９は、
偏光子１８を通過すると直線偏光４３に変わる。直線偏
光４３は液晶１４を通過すると電圧無印加状態で光学主
軸が９０”捩じられ・直線偏光４４となる。１７４波長
板１１は、もう−っの１／４波長板６とで１／２波長板
を構成し、偏光の進相軸と遅相軸との位相差を１８０″
とするものである。即ち、直線偏光４４は２枚の１／４
波長板６及び１１を通過することによって光学主軸が９
０°回転して直線偏光４５となる。偏光子５の光学主軸
は、偏光子１８の光学主軸とその傾きがＯｏ、即ち同一
方向であるので、直線偏光４５は偏光子５を通過して表
示光２０となり、視認できる。On the other hand, the illumination light 19 irradiated from behind the polarizer 18 is
After passing through the polarizer 18, the light changes into linearly polarized light 43. When the linearly polarized light 43 passes through the liquid crystal 14, its optical principal axis is twisted by 90" with no voltage applied, and it becomes linearly polarized light 44. The 174-wave plate 11 and the other 1/4-wave plate 6 are 1/2 Configure a wave plate and set the phase difference between the fast axis and slow axis of polarized light to 180''
That is. That is, the linearly polarized light 44 is 1/4 of the two
By passing through the wave plates 6 and 11, the optical principal axis becomes 9.
It rotates by 0° and becomes linearly polarized light 45. Since the optical principal axis of the polarizer 5 and the optical principal axis of the polarizer 18 are tilted Oo, that is, in the same direction, the linearly polarized light 45 passes through the polarizer 5 and becomes the display light 20, which can be visually recognized.
第５図は本発明の第二の実施例を示す図であり、アクテ
ィブマトリクス方式の透過型液晶表示素子２と保護板１
とで構成された液晶ディスプレイの断面図を示す。即ち
、光学フィルター４８を従来の液晶表示素子２の前面に
設置して、検光子２２表面における外部入射光２３の反
射を防止しようとした。保護板１の構成は、透明板４の
表面に表面反射防止膜３を形成し、透明板４の裏面には
偏光子５及び１／４波長板６を固着した。液晶表示素子
２の構成は、第一の硝子板８の外側表面に検光子２２を
固着し、第一の硝子板８の内側裏面に複数の開口部２８
を有する金属で形成した制光子９を固着し、該制光子９
の開口部２８にカラーフィルター１０を固着して第一層
を形成し、制光子９とカラーフィルター１０との上、全
面に透明電極１２を第二層として形成し、透明電極１２
の上に配向制御膜１３を第三層として形成している。
また、第二の硝子板１７の外側表面に偏光子１８を固着
し、第二の硝子板１７の内側裏面には画素電極１６を形
成している。画素電極１６の上には第二層として配向制
御膜１５が形成されている。FIG. 5 is a diagram showing a second embodiment of the present invention, in which an active matrix transmissive liquid crystal display element 2 and a protection plate 1 are shown.
1 shows a cross-sectional view of a liquid crystal display configured with. That is, an attempt was made to install an optical filter 48 in front of the conventional liquid crystal display element 2 to prevent reflection of externally incident light 23 on the surface of the analyzer 22. The structure of the protection plate 1 is such that a front antireflection film 3 is formed on the surface of a transparent plate 4, and a polarizer 5 and a quarter wavelength plate 6 are fixed to the back surface of the transparent plate 4. The structure of the liquid crystal display element 2 is such that an analyzer 22 is fixed to the outer surface of the first glass plate 8 and a plurality of openings 28 are formed on the inner back surface of the first glass plate 8.
A light control element 9 formed of a metal having
A first layer is formed by fixing the color filter 10 to the opening 28 of the light control element 9 and the color filter 10, and a transparent electrode 12 is formed as a second layer on the entire surface of the light control element 9 and the color filter 10.
An alignment control film 13 is formed as a third layer thereon.
Further, a polarizer 18 is fixed to the outer surface of the second glass plate 17, and a pixel electrode 16 is formed on the inner back surface of the second glass plate 17. An alignment control film 15 is formed as a second layer on the pixel electrode 16.
そして、上記配向制御膜１３と、上記配向制御膜１５と
の間に液晶１４を封止して液晶表示素子２を構成してい
る。Then, the liquid crystal 14 is sealed between the alignment control film 13 and the alignment control film 15 to form the liquid crystal display element 2.
第６図は第５図における構成の動作説明図である。即ち
、順に透明板４、偏光子５．１／４波長板６、検光子２
２、第一の硝子板８、制光子９、・・・とされている。FIG. 6 is an explanatory diagram of the operation of the configuration in FIG. 5. That is, in order, the transparent plate 4, the polarizer 5, the 1/4 wavelength plate 6, and the analyzer 2.
2, a first glass plate 8, a light control element 9, and so on.
外部入射光２３は、偏光子５において、光学主軸が５ａ
方向の直線偏光３３とされて、１／４波長板６を通過し
て円偏光３４に変換される。検光子２２の表面で反射さ
れた円偏光３５は逆回りの円偏光３５となり、逆回りの
円偏光３５が再度１／４波長板６を通過すると直線偏光
３６となる。直線偏光３６は直線偏光３３とは光学主軸
が９０°異なる。In the polarizer 5, the external incident light 23 has an optical principal axis 5a.
The light is converted into linearly polarized light 33 in the same direction, passes through the quarter-wave plate 6, and is converted into circularly polarized light 34. The circularly polarized light 35 reflected by the surface of the analyzer 22 becomes reversely circularly polarized light 35, and when the reversely circularly polarized light 35 passes through the quarter-wave plate 6 again, it becomes linearly polarized light 36. The linearly polarized light 36 has an optical principal axis different from that of the linearly polarized light 33 by 90°.
したがって、直線偏光３６の光学主軸は偏光子５の光学
主軸５ａとは直交しているので、直線偏光３６は偏光子
５を通過できないので、外部に出てくることができない
。Therefore, since the optical principal axis of the linearly polarized light 36 is perpendicular to the optical principal axis 5a of the polarizer 5, the linearly polarized light 36 cannot pass through the polarizer 5 and cannot come out.
第８図は本発明の第三の実施例を示す図であり、第９図
はその動作説明図である。第８図はアクティブマトリク
ス方式の透過型液晶表示素子２と、保護板１と、液晶表
示素子２と保護板１の間に充填した屈折率が略１．５弾
性透明物質４８とで構成された液晶ディスプレイの断面
図を示す。保護板１は透明板４と透明板４の表面に形成
した表面反射防止膜３とからなる。透明板４は光学的に
等方性の透明材料、即ち、アクリル板または硝子板であ
る。液晶表示素子２の構成は、第一の硝子板８の外側表
面に検光子２２を固着し、第一の硝子板８の内側裏面に
複数の開口部４７を有する１／４波長板４６を第一層と
して形成し、１／４波長板４６の上に第二層として複数
の開口部２８を有する金属で形成した制光子９を形成し
である。１／４波長板４６の光学主軸４６ａは検光子２
２の光学主軸２２ａと４５°の傾きを成す。１／４波長
板４６の開口部４７と制光子９の開口部２８とは一致し
ている。１７４波長板４６の開口部４７と制光子９の開
口部２８にカラーフィルター１０を固着し、制光子９と
カラーフィルター１０との上全面に透明電極１２を第二
層として形成し、透明電極１２の上に配向制御膜１３を
第四層として形成している。また、第二の硝子板１７の
外側表面に偏光子１８を固着し、第二の硝子板１７の内
側裏面には画素電極１６を形成している。画素電極１６
の上には第二層として配向制御膜１５が形成されている
。そして、上記配向制御膜１３と、上記配向制御膜１５
との間に液晶１４を封止して液晶表示素子２を構成して
いる。液晶表示素子２と保護板２１の間に充填した弾性
透明物質４８は、その屈折率が略１．５であり、保護板
２１の屈折率や検光子２２の屈折率と略等しい。したが
って、保護板２１の裏面及び検光子２２の表面における
反射率が極めて低下しているため、外部入射光２３の保
護板２１の裏面及び検光子２２の表面における反射光は
ほとんど発生しない。また、保護板２１の表面には表面
反射防止膜３が形成されており、保護板２１の表面にお
ける表面反射率は１％前後に低下している。FIG. 8 is a diagram showing a third embodiment of the present invention, and FIG. 9 is an explanatory diagram of its operation. FIG. 8 shows an active matrix type transmission type liquid crystal display element 2, a protection plate 1, and an elastic transparent material 48 with a refractive index of about 1.5 filled between the liquid crystal display element 2 and the protection plate 1. A cross-sectional view of a liquid crystal display is shown. The protection plate 1 consists of a transparent plate 4 and a surface antireflection film 3 formed on the surface of the transparent plate 4. The transparent plate 4 is an optically isotropic transparent material, ie, an acrylic plate or a glass plate. The structure of the liquid crystal display element 2 is such that an analyzer 22 is fixed to the outer surface of the first glass plate 8, and a quarter wavelength plate 46 having a plurality of openings 47 is attached to the inner back surface of the first glass plate 8. It is formed as a single layer, and a light control element 9 made of metal and having a plurality of openings 28 is formed as a second layer on the quarter-wave plate 46. The optical principal axis 46a of the 1/4 wavelength plate 46 is connected to the analyzer 2.
It forms an inclination of 45 degrees with the optical principal axis 22a of No. 2. The opening 47 of the quarter-wave plate 46 and the opening 28 of the light control element 9 coincide. A color filter 10 is fixed to the opening 47 of the 174 wavelength plate 46 and the opening 28 of the light control element 9, and a transparent electrode 12 is formed as a second layer on the entire upper surface of the light control element 9 and the color filter 10. An alignment control film 13 is formed as a fourth layer thereon. Further, a polarizer 18 is fixed to the outer surface of the second glass plate 17, and a pixel electrode 16 is formed on the inner back surface of the second glass plate 17. Pixel electrode 16
An alignment control film 15 is formed as a second layer thereon. Then, the alignment control film 13 and the alignment control film 15
The liquid crystal display element 2 is configured by sealing a liquid crystal 14 between the two. The elastic transparent material 48 filled between the liquid crystal display element 2 and the protection plate 21 has a refractive index of approximately 1.5, which is approximately equal to the refractive index of the protection plate 21 and the refractive index of the analyzer 22. Therefore, since the reflectance on the back surface of the protection plate 21 and the surface of the analyzer 22 is extremely low, almost no reflected light of the external incident light 23 is generated on the back surface of the protection plate 21 and the surface of the analyzer 22. Further, a surface antireflection film 3 is formed on the surface of the protection plate 21, and the surface reflectance on the surface of the protection plate 21 is reduced to about 1%.
第８図は第７図における構成の動作説明図である。制光
子９と第一の硝子板８との間に形成された１７４波長板
４６は、制光子９の開口部２８と同位置、同寸法、同形
状の開口部４７を有するので、液晶１４を通過してくる
照明光１９に対して制光子９で蔽われている。したがつ
て、１７４波長板４６は照明光１９に影響を及ぼさない
。一方、外部入射光２３は、検光子２２を通過して直線
偏光３３になり、ｌ／４波長板４６を通過して円偏光３
４になる。円偏光３４は制光子９で反射して位相が１８
０°回転して逆回転の円偏光３５に成る。円偏光３５は
１／４波長板４６を通過すると直線偏光３３に対しては
９０″ねじれた直線偏光３６になるため、検光子２２を
通過できず、外部にでてくることができない。FIG. 8 is an explanatory diagram of the operation of the configuration in FIG. 7. The 174-wavelength plate 46 formed between the light control element 9 and the first glass plate 8 has an opening 47 in the same position, same size, and shape as the opening 28 of the light control element 9, so that the liquid crystal 14 can be The illumination light 19 passing therethrough is blocked by a light control element 9. Therefore, the 174-wave plate 46 does not affect the illumination light 19. On the other hand, the external incident light 23 passes through the analyzer 22 and becomes linearly polarized light 33, and passes through the 1/4 wavelength plate 46 and becomes circularly polarized light 33.
It becomes 4. The circularly polarized light 34 is reflected by the light control element 9 and has a phase of 18.
It is rotated by 0° and becomes circularly polarized light 35 of opposite rotation. When circularly polarized light 35 passes through quarter-wave plate 46, it becomes linearly polarized light 36 which is twisted by 90'' with respect to linearly polarized light 33, so it cannot pass through analyzer 22 and cannot come out.
本発明は、上記のように構成されているので、以下に記
載の効果を有する。すなわち、（１）保護板を、透明板
と直線偏光板と該直線偏光板の光学主軸と４５°傾けた
１／４波長板とを備え構成したので、液晶表示素子の表
面に置ける反射光を除去できる。Since the present invention is configured as described above, it has the effects described below. In other words, (1) the protective plate includes a transparent plate, a linearly polarizing plate, and a 1/4 wavelength plate tilted at 45° with respect to the optical principal axis of the linearly polarizing plate, so that the reflected light on the surface of the liquid crystal display element is Can be removed.
（２）保護板を、透明板と直線偏光板と該直線偏光板の
光学主軸と４５°傾けた１／４波長板とを備えて構成し
、液晶表示素子の表示側表面に固着しである検光子を取
り除き、制光子の背面に１７４波長板を配置したので、
液晶表示素子表面及び制光子表面における反射光を除去
できる。(2) The protection plate includes a transparent plate, a linear polarizing plate, and a quarter wavelength plate tilted at 45 degrees with respect to the optical principal axis of the linear polarizing plate, and is fixed to the display side surface of the liquid crystal display element. Since the analyzer was removed and a 174 wavelength plate was placed on the back of the light control element,
Reflected light on the surface of the liquid crystal display element and the light control element can be removed.
（３）制光子と表示側の硝子板との間に１／４波長板を
形成したので、検光子を通過して制光子で反射する反射
光を除去できる。(3) Since a 1/4 wavelength plate is formed between the light control element and the glass plate on the display side, reflected light that passes through the analyzer and is reflected by the light control element can be removed.
第１図は本発明にかかる液晶表示素子の部分断面図、第
２図は従来の液晶表示素子の部分断面図、第３図は、第
２図で示した液晶表示素子の上面図、第４図は、従来の
光学フィルターの動作説明図、第５図は本発明の第二の
実施例の部分断面図、第６図は、第５図における構成の
動作説明図、第７図は、第１図における構成の動作説明
図、第８図は、本発明の第三の実施例の部分断面図、第
９図は、第８図における構成の動作説明図である。
１．２１・・・保護板、 ２・・・液晶表示素子、
４・・・透明板、 ５．１８・・・偏光子
、６．１１．４６・・・１／４波長板、
８・・・第一の硝子板、 ９・・・制光
子、１０・・・カラーフィルター １４・・・
液晶、２２・・・検光子、 ２８．４７・・・
開口部、４９・・・透明物質。FIG. 1 is a partial sectional view of a liquid crystal display element according to the present invention, FIG. 2 is a partial sectional view of a conventional liquid crystal display element, FIG. 3 is a top view of the liquid crystal display element shown in FIG. 5 is a partial sectional view of the second embodiment of the present invention, FIG. 6 is an explanatory diagram of the operation of the configuration in FIG. 5, and FIG. FIG. 8 is a partial sectional view of the third embodiment of the present invention, and FIG. 9 is an explanatory diagram of the operation of the configuration in FIG. 8. 1.21...protective plate, 2...liquid crystal display element,
4... Transparent plate, 5.18... Polarizer, 6.11.46... 1/4 wavelength plate, 8... First glass plate, 9... Light control element, 10...・Color filter 14...
Liquid crystal, 22... Analyzer, 28.47...
Opening, 49...transparent substance.
Claims (1)
子（２）の前面に配置された保護板（１）とを備えてな
る液晶ディスプレイにおいて、 上記液晶表示素子（２）が、少なくとも、 第一の硝子板（８）と、 該第一の硝子板（８）の内側裏面に形成さ れた開口部分（２８）を有する制光子（９）と、 少なくとも外側表面に偏光子（１８）を固 着された第二の硝子板（１７）と、 上記第一の硝子板（８）の内側と上記第二 の硝子板（１７）の内側との間に封止された液晶（１４
）と、 該液晶（１４）と上記制光子（９）との間 に挿置された１／４波長板（１１）と、 を備えて構成され、 上記１／４波長板（１１）の光学主軸は上 記偏光子（１８）の光学主軸に対して時計回り方向に４
５゜傾けられており、 かつ、 上記保護板（１）が、少なくとも、 上記偏光子（１８）と光学主軸が同一方向 とされた偏光子（５）と、 該偏光子（５）の裏面側に固着され、その 光学主軸が上記偏光子（５）の光学主軸に対し反時計回
り方向に４５゜傾けられた１／４波長板（６）とを備え
て構成されている、 ことを特徴とする液晶ディスプレイ。 ２、少なくとも、液晶表示素子（２）と、該液晶表示素
子（２）の前面に配置された保護板（１）とを備えてな
る液晶ディスプレイにおいて、 上記液晶表示素子（２）が、少なくとも、 第一の硝子板（８）と、 該第一の硝子板（８）の外側表面に固着さ れた検光子（２２）と、 少なくとも外側表面に偏光子（１８）を固 着された第二の硝子板（１７）と、 上記制光子（９）と該第二の硝子板（１７）の内側との
間に封止された液晶（１４）と、を備えて構成され、 上記保護板（１）が、少なくとも、 偏光子（５）と、 該偏光子（５）の裏面側に固着されて成る １／４波長板（６）と、 を備えて構成され、 該１／４波長板（６）の光学主軸と上記偏 光子（５）の光学主軸とは、４５゜傾けられている、 ことを特徴とする液晶ディスプレイ。 ３、少なくとも、液晶表示素子（２）と、該液晶表示素
子（２）の前面に配置された保護板（１）とを備えてな
る液晶ディスプレイにおいて、 上記液晶表示素子（２）が、少なくとも、 第一の硝子板（８）と、 該第一の硝子板（８）の外側表面に固着し た検光子（２２）と、 上記第一の硝子板（８）の内側裏面の第一 層に形成された開口部分（４７）を有し、上記検光子（
２２）に対し光学主軸が４５゜傾けられた１／４波長板
（４６）と、 該１／４波長板（４６）の上に第二層とし て形成された上記開口部分（４７）と同位置、同寸法、
同形状の開口部分（２８）を有する制光子（９）と、 少なくとも外側表面に偏光子（１８）を固 着された第二の硝子板（１７）と、 上記制光子（９）と上記第二の硝子板（１ ７）の内側との間に封止された液晶（１４）と、 を備えて構成され、 上記保護板（１）が、 光学的に等方性の透明材料を含んで構成さ れている、 ことを特徴とする液晶ディスプレイ。[Claims] 1. A liquid crystal display comprising at least a liquid crystal display element (2) and a protective plate (1) disposed in front of the liquid crystal display element (2), comprising: 2) includes at least a first glass plate (8), a light control element (9) having an opening portion (28) formed on an inner back surface of the first glass plate (8), and at least an outer surface of the first glass plate (8). A second glass plate (17) to which a polarizer (18) is fixed is sealed between the inside of the first glass plate (8) and the inside of the second glass plate (17). LCD (14
); a quarter-wave plate (11) inserted between the liquid crystal (14) and the light control element (9); The main axis is 4 in the clockwise direction with respect to the optical main axis of the polarizer (18).
The protective plate (1) includes at least a polarizer (5) whose optical principal axis is in the same direction as the polarizer (18), and a back side of the polarizer (5). and a quarter-wave plate (6) whose optical principal axis is tilted at 45 degrees counterclockwise with respect to the optical principal axis of the polarizer (5). LCD display. 2. In a liquid crystal display comprising at least a liquid crystal display element (2) and a protective plate (1) disposed in front of the liquid crystal display element (2), the liquid crystal display element (2) at least comprises: a first glass plate (8), an analyzer (22) fixed to the outer surface of the first glass plate (8), and a second glass plate having a polarizer (18) fixed to at least the outer surface thereof. a plate (17); and a liquid crystal (14) sealed between the light control element (9) and the inside of the second glass plate (17), and the protective plate (1) is configured to include at least a polarizer (5) and a quarter-wave plate (6) fixed to the back side of the polarizer (5), and the quarter-wave plate (6) A liquid crystal display characterized in that the optical principal axis of the polarizer (5) and the optical principal axis of the polarizer (5) are inclined by 45 degrees. 3. In a liquid crystal display comprising at least a liquid crystal display element (2) and a protective plate (1) disposed in front of the liquid crystal display element (2), the liquid crystal display element (2) at least comprises: a first glass plate (8); an analyzer (22) fixed to the outer surface of the first glass plate (8); and a first layer formed on the inner back surface of the first glass plate (8). The analyzer (
a quarter-wave plate (46) whose optical principal axis is tilted at 45 degrees with respect to the quarter-wave plate (46); , same dimensions,
a light control element (9) having an opening portion (28) of the same shape; a second glass plate (17) having a polarizer (18) fixed to at least its outer surface; the light control element (9) and the second glass plate; a liquid crystal (14) sealed between the inner side of the glass plate (17), and the protective plate (1) includes an optically isotropic transparent material. A liquid crystal display characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1295038A JP2810161B2 (en) | 1989-11-15 | 1989-11-15 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1295038A JP2810161B2 (en) | 1989-11-15 | 1989-11-15 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03156420A true JPH03156420A (en) | 1991-07-04 |
| JP2810161B2 JP2810161B2 (en) | 1998-10-15 |
Family
ID=17815521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1295038A Expired - Lifetime JP2810161B2 (en) | 1989-11-15 | 1989-11-15 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2810161B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01276735A (en) * | 1988-04-28 | 1989-11-07 | Fuji Electric Co Ltd | Integrated circuit element wafer |
| JPH10186136A (en) * | 1996-11-11 | 1998-07-14 | Dowa Mining Co Ltd | Optical filter |
| JP2002534712A (en) * | 1998-12-31 | 2002-10-15 | ハネウエル・インコーポレーテッド | Reflection-polarized reduction display |
| WO2007046209A1 (en) * | 2005-10-18 | 2007-04-26 | Sharp Kabushiki Kaisha | Liquid crystal display |
| JP2008083492A (en) * | 2006-09-28 | 2008-04-10 | Epson Imaging Devices Corp | Liquid crystal device and electronic apparatus |
| JP2008209822A (en) * | 2007-02-28 | 2008-09-11 | Casio Comput Co Ltd | Liquid crystal display device |
| JP2009098271A (en) * | 2007-10-15 | 2009-05-07 | Toshiba Matsushita Display Technology Co Ltd | Display element |
| WO2019013109A1 (en) * | 2017-07-13 | 2019-01-17 | シャープ株式会社 | Liquid crystal display device |
| CN109416483A (en) * | 2016-04-14 | 2019-03-01 | 夏普株式会社 | Liquid crystal display panel and liquid crystal display device |
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|---|---|---|---|---|
| JPS51138399A (en) * | 1975-05-26 | 1976-11-29 | Sharp Corp | Liquid crystal display device |
| JPS5548734A (en) * | 1978-10-04 | 1980-04-08 | Citizen Watch Co Ltd | Colored liquid crystal display device |
| JPS629319A (en) * | 1985-07-06 | 1987-01-17 | Nitto Electric Ind Co Ltd | Liquid crystal display cell |
| JPS6325626A (en) * | 1986-07-18 | 1988-02-03 | Stanley Electric Co Ltd | Liquid crystal display element |
| JPS63239421A (en) * | 1987-03-27 | 1988-10-05 | Asahi Glass Co Ltd | Liquid crystal display device |
| JPS63279229A (en) * | 1987-05-12 | 1988-11-16 | Asahi Glass Co Ltd | Liquid crystal display device |
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1989
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS51138399A (en) * | 1975-05-26 | 1976-11-29 | Sharp Corp | Liquid crystal display device |
| JPS5548734A (en) * | 1978-10-04 | 1980-04-08 | Citizen Watch Co Ltd | Colored liquid crystal display device |
| JPS629319A (en) * | 1985-07-06 | 1987-01-17 | Nitto Electric Ind Co Ltd | Liquid crystal display cell |
| JPS6325626A (en) * | 1986-07-18 | 1988-02-03 | Stanley Electric Co Ltd | Liquid crystal display element |
| JPS63239421A (en) * | 1987-03-27 | 1988-10-05 | Asahi Glass Co Ltd | Liquid crystal display device |
| JPS63279229A (en) * | 1987-05-12 | 1988-11-16 | Asahi Glass Co Ltd | Liquid crystal display device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01276735A (en) * | 1988-04-28 | 1989-11-07 | Fuji Electric Co Ltd | Integrated circuit element wafer |
| JPH10186136A (en) * | 1996-11-11 | 1998-07-14 | Dowa Mining Co Ltd | Optical filter |
| USRE43924E1 (en) | 1996-11-11 | 2013-01-15 | Dowa Holdings Co., Ltd. | Display device with a transparent optical filter |
| JP4745501B2 (en) * | 1998-12-31 | 2011-08-10 | ハネウェル・インターナショナル・インコーポレーテッド | Polarized display with reduced reflectivity |
| JP2002534712A (en) * | 1998-12-31 | 2002-10-15 | ハネウエル・インコーポレーテッド | Reflection-polarized reduction display |
| WO2007046209A1 (en) * | 2005-10-18 | 2007-04-26 | Sharp Kabushiki Kaisha | Liquid crystal display |
| JPWO2007046209A1 (en) * | 2005-10-18 | 2009-04-23 | シャープ株式会社 | Liquid crystal display |
| JP4593628B2 (en) * | 2005-10-18 | 2010-12-08 | シャープ株式会社 | Liquid crystal display |
| JP2008083492A (en) * | 2006-09-28 | 2008-04-10 | Epson Imaging Devices Corp | Liquid crystal device and electronic apparatus |
| JP2008209822A (en) * | 2007-02-28 | 2008-09-11 | Casio Comput Co Ltd | Liquid crystal display device |
| JP2009098271A (en) * | 2007-10-15 | 2009-05-07 | Toshiba Matsushita Display Technology Co Ltd | Display element |
| CN109416483A (en) * | 2016-04-14 | 2019-03-01 | 夏普株式会社 | Liquid crystal display panel and liquid crystal display device |
| WO2019013109A1 (en) * | 2017-07-13 | 2019-01-17 | シャープ株式会社 | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2810161B2 (en) | 1998-10-15 |
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