JPH07120745A - Reflection type liquid crystal panel - Google Patents
Reflection type liquid crystal panelInfo
- Publication number
- JPH07120745A JPH07120745A JP5266962A JP26696293A JPH07120745A JP H07120745 A JPH07120745 A JP H07120745A JP 5266962 A JP5266962 A JP 5266962A JP 26696293 A JP26696293 A JP 26696293A JP H07120745 A JPH07120745 A JP H07120745A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polarizing plate
- incident light
- crystal panel
- light side
- 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
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、片側に反射板を備え
た反射型液晶パネルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflective liquid crystal panel having a reflector on one side.
【０００２】[0002]
【従来の技術】従来、透過型液晶パネルでは、高コント
ラストを得る目的でパネルの両側の偏光板には高偏光度
タイプのものが用いられていた。また、反射型液晶パネ
ルでも同様に、反射板側と入射光側の偏光板には高偏光
度タイプのものが用いられていた。2. Description of the Related Art Conventionally, in a transmissive liquid crystal panel, polarizing plates on both sides of the panel are of high polarization type for the purpose of obtaining high contrast. Further, in the reflective liquid crystal panel, similarly, the polarizing plate on the reflecting plate side and the polarizing plate on the incident light side are of high polarization degree type.
【０００３】[0003]
【発明が解決しようとする課題】偏光板は偏光度が高く
なると吸収軸方向の透過率が低下するが、それに伴い透
過軸方向の透過率も低下してしまう。したがって、パネ
ルの両側に高偏光度の偏光板を用いた場合、液晶パネル
の透過率が低下することになる。そして、反射型液晶パ
ネルは、バックライトで光量を調節することができない
ため、透過型液晶パネルよりも表示の明るさは暗くな
る。透過型液晶パネルと同様に高偏光度タイプの偏光板
を用いた場合、偏光板の透過率が低下するために表示が
更に暗くなり、視認性が低下するという問題があった。When the degree of polarization of a polarizing plate increases, the transmittance in the absorption axis direction decreases, but the transmittance in the transmission axis direction also decreases accordingly. Therefore, when a polarizing plate having a high degree of polarization is used on both sides of the panel, the transmittance of the liquid crystal panel is lowered. Since the reflective liquid crystal panel cannot control the amount of light with a backlight, the display brightness is lower than that of the transmissive liquid crystal panel. When a high polarization type polarizing plate is used as in the transmissive liquid crystal panel, the transmittance of the polarizing plate is lowered, so that the display is further darkened and the visibility is lowered.
【０００４】また、液晶パネルの表示の明るさを向上さ
せる目的で、両側の偏光板として高透過率のものを用い
た場合には、偏光板の偏光度が低いためにコントラスト
が低下してしまうという問題があった。さらに、液晶層
や液晶層中のスペーサ粒子と硝子基板との界面での反射
やスペーサ粒子による散乱によってコントラストが低下
するという問題があった。Further, when polarizing plates on both sides having a high transmittance are used for the purpose of improving the display brightness of the liquid crystal panel, the contrast is lowered due to the low degree of polarization of the polarizing plates. There was a problem. Further, there is a problem that the contrast is lowered due to reflection at the interface between the liquid crystal layer or the spacer particles in the liquid crystal layer and the glass substrate and scattering by the spacer particles.
【０００５】したがってこの発明の目的は、表示を明る
くし、コントラストの高い反射型液晶パネルを提供する
ことである。Therefore, an object of the present invention is to provide a reflective liquid crystal panel which brightens the display and has a high contrast.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の反射型液
晶パネルは、反射板側の偏光板の透過率を入射光側の偏
光板の透過率よりも高くしたことを特徴とする。請求項
２記載の反射型液晶パネルは、請求項１記載の反射型液
晶パネルにおいて、反射板側の偏光板として透過率が４
４％以上のものを用いている。The reflection type liquid crystal panel according to claim 1 is characterized in that the transmittance of the polarizing plate on the reflecting plate side is made higher than the transmittance of the polarizing plate on the incident light side. The reflection type liquid crystal panel according to claim 2 is the reflection type liquid crystal panel according to claim 1, wherein the polarizing plate on the reflection plate side has a transmittance of 4%.
4% or more is used.
【０００７】請求項３記載の反射型液晶パネルは、請求
項１記載の反射型液晶パネルにおいて、入射光側の偏光
板として偏光度が９５％以上のものを用いている。請求
項４記載の反射型液晶パネルは、請求項１記載の反射型
液晶パネルにおいて、入射光側の基板に接する液晶分子
の屈折率の大きい軸と、入射光側の偏光板の透過軸との
なす角度を、４５度以上１３５度以下にしている。A reflective liquid crystal panel according to a third aspect is the reflective liquid crystal panel according to the first aspect, wherein the polarizing plate on the incident light side has a polarization degree of 95% or more. The reflective liquid crystal panel according to claim 4 is the reflective liquid crystal panel according to claim 1, wherein an axis having a large refractive index of liquid crystal molecules in contact with a substrate on the incident light side and a transmission axis of a polarizing plate on the incident light side. The angle formed is 45 degrees or more and 135 degrees or less.
【０００８】請求項５記載の反射型液晶パネルは、請求
項１記載の反射型液晶パネルにおいて、液晶層を一定の
層厚に保つために前記液晶層内に散布されているスペー
サ粒子として酸化珪素系のものを用いている。A reflective liquid crystal panel according to a fifth aspect is the reflective liquid crystal panel according to the first aspect, wherein silicon oxide is used as spacer particles dispersed in the liquid crystal layer in order to keep the liquid crystal layer at a constant layer thickness. I am using a system.
【０００９】[0009]
【作用】この発明の反射型液晶パネルは、反射板側の偏
光板の透過率を入射光側の偏光板の透過率よりも高くし
たことにより、コントラストを低下させずに表示を明る
くすることができる。そしてさらに、入射光側の偏光板
として高偏光度タイプの偏光板を用いて、液晶分子の屈
折率の大きい軸方向の直線偏光成分の反射を抑える。入
射光側の偏光板の角度を液晶層の入射光側界面の液晶分
子の屈折率の小さい軸にそろえる、すなわち、入射光側
の硝子基板に接する液晶分子の屈折率の大きい軸と、入
射光側に設置する偏光板の透過軸とのなす角度が４５度
以上１３５度以下とすることにより、基板と液晶層の界
面の反射率を小さくし、コントラストを向上させること
ができる。In the reflective liquid crystal panel of the present invention, the transmittance of the polarizing plate on the reflecting plate side is made higher than the transmittance of the polarizing plate on the incident light side, so that the display can be brightened without lowering the contrast. it can. Further, a high polarization degree type polarizing plate is used as a polarizing plate on the incident light side to suppress reflection of a linearly polarized component in the axial direction in which the liquid crystal molecules have a large refractive index. Align the angle of the polarizing plate on the incident light side with the axis with the small refractive index of the liquid crystal molecules at the interface of the incident light side of the liquid crystal layer, that is, with the axis with the large refractive index of the liquid crystal molecules in contact with the glass substrate on the incident light side, When the angle formed by the transmission axis of the polarizing plate installed on the side is 45 degrees or more and 135 degrees or less, the reflectance at the interface between the substrate and the liquid crystal layer can be reduced and the contrast can be improved.
【００１０】また、液晶層内に散布されているスペーサ
粒子として酸化珪素系のものを用いることにより、スペ
ーサ粒子の屈折率が基板とほぼ等しいために界面での反
射を防止することができる。さらに、酸化珪素系のスペ
ーサ粒子は樹脂系のものと比べて圧縮弾性率が大きく、
樹脂系のものの１／５〜１／１０の散布数でも液晶層厚
を一定に保つことができるので、スペーサ粒子による反
射はほとんど無視できるため、よりコントラストを向上
させることができる。Further, by using silicon oxide particles as the spacer particles dispersed in the liquid crystal layer, since the spacer particles have a refractive index substantially equal to that of the substrate, reflection at the interface can be prevented. Further, the silicon oxide type spacer particles have a larger compressive elastic modulus than the resin type,
Since the liquid crystal layer thickness can be kept constant even when the number of sprays is 1/5 to 1/10 that of the resin type, the reflection by the spacer particles can be almost ignored and the contrast can be further improved.
【００１１】[0011]
【実施例】この発明の一実施例について図面を参照しな
がら説明する。この発明の一実施例の反射型液晶パネル
は、反射板側に高透過率タイプの偏光板を、入射光側に
高偏光度タイプの偏光板を用いている。さらに、入射光
側の偏光板の角度を液晶層の入射光側界面の液晶分子の
屈折率の小さい軸にそろえるようにし、液晶層内のスペ
ーサ粒子として酸化珪素系のものを用いるようにしたも
のである。以下、詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The reflective liquid crystal panel of one embodiment of the present invention uses a high transmittance type polarizing plate on the reflecting plate side and a high polarization type polarizing plate on the incident light side. Further, the angle of the polarizing plate on the incident light side is aligned with the axis having a small refractive index of liquid crystal molecules at the interface of the incident light side of the liquid crystal layer, and silicon oxide-based particles are used as spacer particles in the liquid crystal layer. Is. The details will be described below.
【００１２】まず、図６に反射型スーパーツイステッド
ネマティック（以下「ＳＴＮ」という）パネルの主要部
の断面を示す。図６において、１０は入射光側偏向板、
１１は反射板側偏向板、２０は位相差板、３０は液晶
層、４０は入射光側硝子基板、４１は反射板側硝子基
板、５０はスペーサ粒子、６０はシール樹脂、７０は反
射板、８０は入射光である。First, FIG. 6 shows a cross section of a main part of a reflection type super twisted nematic (hereinafter referred to as "STN") panel. In FIG. 6, 10 is an incident light side deflection plate,
Reference numeral 11 is a reflector side deflection plate, 20 is a retardation plate, 30 is a liquid crystal layer, 40 is an incident light side glass substrate, 41 is a reflection plate side glass substrate, 50 is spacer particles, 60 is a sealing resin, 70 is a reflection plate, 80 is incident light.
【００１３】この図６に示す反射型ＳＴＮパネルにおい
て、入射光側偏光板１０として透過率４４．５％、偏光
度９９．５％のもの（表１の偏向板Ｃ）を用い、反射板
側偏光板１１には表１に示す透過率の異なるＡ〜Ｄの偏
光板を順次取り替えてパネルのコントラストと明るさを
測定してみると、図３に示す結果が得られた。In the reflective STN panel shown in FIG. 6, an incident light side polarizing plate 10 having a transmittance of 44.5% and a polarization degree of 99.5% (deflecting plate C in Table 1) is used. When the polarizing plates A to D having different transmittances shown in Table 1 were sequentially replaced as the polarizing plate 11 and the contrast and brightness of the panel were measured, the results shown in FIG. 3 were obtained.
【００１４】[0014]
【表１】 [Table 1]
【００１５】図３から明らかなように、反射板側偏光板
１１として透過率の高いものを用いると、パネルのコン
トラストを落とさずに明るさを向上させることができ
る。次に、液晶パネルを構成する偏光板，硝子基板，液
晶層，位相差板等の各層はそれぞれ固有の屈折率がある
ため、入射光の一部は各層間の界面で反射される。この
とき、界面の垂直方向の反射率をｒ，入射光側の層と出
射側の層の屈折率をそれぞれｎ1 ，ｎ2 とすると、反射
率ｒは数１で示される。As is apparent from FIG. 3, when the reflective plate side polarizing plate 11 having a high transmittance is used, the brightness can be improved without reducing the contrast of the panel. Next, since each layer such as a polarizing plate, a glass substrate, a liquid crystal layer, and a retardation plate that form a liquid crystal panel has a unique refractive index, part of incident light is reflected at the interface between the layers. At this time, assuming that the reflectance in the vertical direction of the interface is r and the refractive indexes of the incident light side layer and the exit side layer are n 1 and n 2 , respectively, the reflectance r is expressed by the following formula 1.
【００１６】[0016]
【数１】 [Equation 1]
【００１７】数１から、各層の屈折率差が大きいほど反
射率は大きくなる。この各層界面での反射が反射型液晶
パネルのコントラストを低下させている原因の一つであ
る。また、液晶分子は屈折率異方性を有するため、液晶
層に硝子基板を通して楕円偏光が入射する時には、楕円
偏光の長軸方向と液晶分子の屈折率の小さい軸をそろえ
ることによって、液晶層と硝子基板の界面の反射率を小
さくすることができる。From Equation 1, the larger the difference in refractive index between the layers, the larger the reflectance. The reflection at the interface of each layer is one of the causes for lowering the contrast of the reflective liquid crystal panel. Further, since liquid crystal molecules have a refractive index anisotropy, when elliptically polarized light is incident on the liquid crystal layer through the glass substrate, by aligning the major axis direction of the elliptically polarized light and the axis having a small refractive index of the liquid crystal molecules, The reflectance at the interface of the glass substrate can be reduced.
【００１８】一方、液晶層と両側の偏光板を偏光素子と
考えた場合、偏光板の角度構成としては、ある構成とそ
れぞれの偏光板が９０度ずれた構成とは光学的に同等で
あると見なされる。そこで、これら同等と見なされる２
通りの偏光板の角度構成のうちの硝子基板と液晶層の界
面の反射が小さくなる方の角度構成を選択し、さらに入
射光側に高偏光度の偏光板を用いて、液晶分子の屈折率
の大きい軸方向の直線偏光成分の反射を抑えることによ
り、高コントラストを得ることができる。以下、このこ
とを具体的に図面を用いて説明する。On the other hand, when the liquid crystal layer and the polarizing plates on both sides are considered as polarizing elements, the angular configuration of the polarizing plates is optically equivalent to a certain configuration in which the respective polarizing plates are deviated by 90 degrees. Is considered Therefore, these are considered to be equivalent 2
The angle configuration of the normal polarizing plate, which has the smaller reflection at the interface between the glass substrate and the liquid crystal layer, is selected, and a polarizing plate with a high degree of polarization is used on the incident light side to determine the refractive index of the liquid crystal molecules. A high contrast can be obtained by suppressing the reflection of the linearly polarized light component in the axial direction having a large angle. Hereinafter, this will be specifically described with reference to the drawings.
【００１９】図１は反射型ツイステッドネマティック
（以下「ＴＮ」という）パネルの液晶層と両側偏光板の
角度構成を示し、この発明の一実施例の反射型液晶パネ
ルである。図２は各層の界面での反射を考慮に入れない
場合に図１と光学的に同等と見なされる偏光板の角度構
成を示している。図１，図２において、１０は入射光側
偏向板、１１は反射板側偏向板、１２は入射光側偏向板
１０の透過軸方向、１３は反射板側偏向板１１の透過軸
方向、３０は液晶層、３１は液晶層３０の入射光側界面
に位置する液晶分子、３２は液晶層３０の反射板側界面
に位置する液晶分子、４０は入射光側硝子基板、４１は
反射板側硝子基板、７０は反射板、８０は入射光であ
る。FIG. 1 shows the angle configuration of a liquid crystal layer and a polarizing plate on both sides of a reflective twisted nematic (hereinafter referred to as "TN") panel, which is a reflective liquid crystal panel according to an embodiment of the present invention. FIG. 2 shows an angular configuration of a polarizing plate which is considered to be optically equivalent to that of FIG. 1 when the reflection at the interface of each layer is not taken into consideration. 1 and 2, 10 is an incident light side deflection plate, 11 is a reflection plate side deflection plate, 12 is a transmission axis direction of the incidence light side deflection plate 10, 13 is a transmission axis direction of the reflection plate side deflection plate 11, and 30 Is a liquid crystal layer, 31 is a liquid crystal molecule located at the incident light side interface of the liquid crystal layer 30, 32 is a liquid crystal molecule located at the reflector side interface of the liquid crystal layer 30, 40 is an incident light side glass substrate, and 41 is a reflector plate glass. A substrate, 70 is a reflector, and 80 is incident light.
【００２０】入射光側偏光板１０には高偏向度タイプの
ものとして表１の偏光板Ｃを用い、反射板側偏光板１１
には、入射光側偏光板１０より透過率の高いタイプのも
のとして表１の偏光板Ｄを用いた。図４に図１の構成の
ＴＮパネルと図２の構成のＴＮパネルの印加電圧−反射
率特性を示す。コントラストは図１の構成のパネルが２
９．３であり、図２の構成のパネルが２６．２であっ
た。図４からも明らかなように入射光側偏光板１０の透
過軸方向１２を、液晶層３０の入射光側界面の液晶分子
３１の屈折率の小さい軸にできるだけそろえることによ
り、反射型パネルのコントラストを向上させることがで
きる。As the incident light side polarizing plate 10, a polarizing plate C shown in Table 1 is used as a high deflection type, and a polarizing plate side polarizing plate 11 is used.
As the polarizing plate D, the polarizing plate D shown in Table 1 was used as a type having higher transmittance than the incident light side polarizing plate 10. FIG. 4 shows applied voltage-reflectance characteristics of the TN panel having the configuration of FIG. 1 and the TN panel having the configuration of FIG. The contrast is 2 for the panel with the configuration of Fig. 1.
9.3, and the panel of the configuration of Figure 2 was 26.2. As is clear from FIG. 4, by aligning the transmission axis direction 12 of the incident light side polarization plate 10 with the axis having the smallest refractive index of the liquid crystal molecules 31 at the incident light side interface of the liquid crystal layer 30, the contrast of the reflective panel is improved. Can be improved.
【００２１】さらに、図５は、液晶層内に散布するスペ
ーサ粒子として、樹脂系のものを用いて作成した液晶パ
ネルと、酸化珪素系のものを用いて作成した液晶パネル
の印加電圧−反射率特性を示している。コントラストは
樹脂系のスペーサ粒子で作成したパネルについては２
７．８、酸化珪素系のスペーサ粒子で作成したパネルに
ついては２９．３であった。この図５からも明らかなよ
うに、酸化珪素系のスペーサ粒子を用いて作成した液晶
パネルは黒表示の沈み込みが良く、高コントラストが得
られる。これは、スペーサ粒子として酸化珪素系のもの
を用いれば、その屈折率が硝子基板とほぼ等しいために
界面での反射を防止することができるためである。さら
に、酸化珪素系のスペーサ粒子は樹脂系のものと比べて
圧縮弾性率が大きく、樹脂系のものの１／５〜１／１０
の散布数でも液晶層厚を一定に保つことができるので、
スペーサ粒子による反射もほとんど無視できる。Further, FIG. 5 shows the applied voltage-reflectance of a liquid crystal panel made of resin type spacer particles and a liquid crystal panel made of silicon oxide type spacer particles dispersed in the liquid crystal layer. It shows the characteristics. Contrast is 2 for panels made of resin spacer particles.
7.8, and 29.3 for a panel made of silicon oxide based spacer particles. As is clear from FIG. 5, the liquid crystal panel produced by using the silicon oxide-based spacer particles has a good sinking of black display and a high contrast. This is because if silicon oxide particles are used as the spacer particles, the refractive index thereof is substantially equal to that of the glass substrate, so that reflection at the interface can be prevented. Further, the silicon oxide-based spacer particles have a larger compressive elastic modulus than the resin-based spacer particles, and are 1/5 to 1/10 that of the resin-based spacer particles.
Since the liquid crystal layer thickness can be kept constant even with the number of sprayed
The reflection by the spacer particles can be almost ignored.
【００２２】以上のようにこの実施例によれば、反射板
側の偏光板に、透過率が入射光側の偏光板の透過率より
も高い高透過率タイプの偏光板を用いることにより、コ
ントラストを低下させずに表示を明るくすることができ
る。この際、反射板側の偏光板として透過率が４４％以
上のものを用いる。そしてさらに、入射光側の偏光板と
して、偏光度が９５％以上の高偏光度タイプの偏光板を
用い、入射光側の偏光板の角度を液晶層の入射光側界面
の液晶分子の屈折率の小さい軸にそろえる、すなわち、
入射光側の硝子基板に接する液晶分子の屈折率の大きい
軸と、入射光側に設置する偏光板の透過軸とのなす角度
が４５度以上１３５度以下とすることにより、コントラ
ストを向上させることができる。As described above, according to this embodiment, a high transmittance type polarizing plate whose transmittance is higher than that of the polarizing plate on the incident light side is used for the polarizing plate on the reflecting plate side, and thus the contrast is improved. The display can be made brighter without degrading. At this time, a polarizing plate on the side of the reflecting plate having a transmittance of 44% or more is used. Further, as the incident light side polarizing plate, a high polarization type polarizing plate having a polarization degree of 95% or more is used, and the angle of the incident light side polarizing plate is set to the refractive index of liquid crystal molecules at the incident light side interface of the liquid crystal layer. Aligned with the small axis of, ie
Improving the contrast by making the angle between the axis of the liquid crystal molecules having a large refractive index in contact with the glass substrate on the incident light side and the transmission axis of the polarizing plate installed on the incident light side from 45 degrees to 135 degrees. You can
【００２３】また、液晶層内に散布されているスペーサ
粒子として酸化珪素系のものを用いることにより、より
コントラストを向上させることができる。Further, by using silicon oxide-based particles as the spacer particles dispersed in the liquid crystal layer, the contrast can be further improved.
【００２４】[0024]
【発明の効果】この発明の反射型液晶パネルは、反射板
側の偏光板の透過率を入射光側の偏光板の透過率よりも
高くしたことにより、コントラストを低下させずに表示
を明るくすることができる。そしてさらに、入射光側の
偏光板として高偏光度タイプの偏光板を用い、入射光側
の硝子基板に接する液晶分子の屈折率の大きい軸と、入
射光側に設置する偏光板の透過軸とのなす角度が４５度
以上１３５度以下とすることにより、液晶分子の屈折率
の大きい軸方向の直線偏光成分の反射を抑えるととも
に、基板と液晶層の界面の反射率を小さくし、コントラ
ストを向上させることができる。According to the reflective liquid crystal panel of the present invention, the transmittance of the polarizing plate on the reflecting plate side is made higher than the transmittance of the polarizing plate on the incident light side to brighten the display without lowering the contrast. be able to. Further, a high polarization type polarizing plate is used as a polarizing plate on the incident light side, an axis having a large refractive index of liquid crystal molecules in contact with the glass substrate on the incident light side, and a transmission axis of the polarizing plate installed on the incident light side. By making the angle between 45 degrees and 135 degrees inclusive, the reflection of the linearly polarized light component in the axial direction, which has a large refractive index of the liquid crystal molecules, is suppressed and the reflectance at the interface between the substrate and the liquid crystal layer is reduced to improve the contrast. Can be made.
【００２５】また、液晶層内に散布されているスペーサ
粒子として酸化珪素系のものを用いることにより、より
コントラストを向上させることができる。Further, the use of silicon oxide particles as the spacer particles dispersed in the liquid crystal layer can further improve the contrast.
【図１】この発明による反射型液晶パネルの液晶層と偏
光板の角度構成を示す図である。FIG. 1 is a diagram showing an angular configuration of a liquid crystal layer and a polarizing plate of a reflective liquid crystal panel according to the present invention.
【図２】図１と光学的に同等と見なされる偏光板の角度
構成を示す図である。FIG. 2 is a diagram showing an angular configuration of a polarizing plate which is considered to be optically equivalent to FIG.
【図３】透過率の異なる偏光板を反射板側偏光板として
用いた時の表示の明るさとコントラストの変化を示す図
である。FIG. 3 is a diagram showing changes in display brightness and contrast when polarizing plates having different transmittances are used as a polarizing plate on a reflecting plate side.
【図４】図１の構成のＴＮパネルと図２の構成のＴＮパ
ネルの印加電圧−反射率特性を示す図である。FIG. 4 is a diagram showing applied voltage-reflectance characteristics of the TN panel having the configuration of FIG. 1 and the TN panel having the configuration of FIG.
【図５】樹脂系のスペーサ粒子で作成した液晶パネルと
酸化珪素系のスペーサ粒子で作成した液晶パネルの印加
電圧−反射率特性を示す図である。FIG. 5 is a diagram showing applied voltage-reflectance characteristics of a liquid crystal panel made of resin-based spacer particles and a liquid crystal panel made of silicon oxide-based spacer particles.
【図６】一般的な反射型ＳＴＮパネルの断面図である。FIG. 6 is a cross-sectional view of a typical reflective STN panel.
１０ 入射光側偏光板 １１ 反射板側偏光板 １２ 入射光側偏光板の透過軸方向 １３ 反射板側偏光板の透過軸方向 ３０ 液晶層 ３１ 液晶層の入射光側界面に位置する液晶分子 ３２ 液晶層の反射板側界面に位置する液晶分子 ４０ 入射光側の硝子基板 ４１ 反射板側の硝子基板 ５０ スペーサ粒子 ７０ 反射板 ８０ 入射光 10 Incident light side polarization plate 11 Reflection plate side polarization plate 12 Transmission axis direction of incident light side polarization plate 13 Transmission axis direction of reflection plate side polarization plate 30 Liquid crystal layer 31 Liquid crystal molecules positioned at the incidence light side interface of liquid crystal layer 32 Liquid crystal Liquid crystal molecules located on the interface of the layer on the reflector side 40 Glass substrate on the incident light side 41 Glass substrate on the reflector side 50 Spacer particles 70 Reflector 80 Incident light
Claims (5)
一対の偏光板を配置し、前記一対の偏向板のうち一方の
偏向板の外側に反射板を備えた反射型液晶パネルであっ
て、 反射板側の偏光板の透過率を入射光側の偏光板の透過率
よりも高くしたことを特徴とする反射型液晶パネル。1. A reflection type liquid crystal panel comprising a pair of polarizing plates disposed on both outer sides of a pair of substrates sandwiching a liquid crystal layer, and a reflection plate provided on the outer side of one of the pair of deflection plates. The reflective liquid crystal panel is characterized in that the transmittance of the polarizing plate on the reflecting plate side is made higher than the transmittance of the polarizing plate on the incident light side.
以上のものを用いた請求項１記載の反射型液晶パネル。2. The polarizing plate on the reflector side has a transmittance of 44%.
The reflective liquid crystal panel according to claim 1, wherein the above-mentioned ones are used.
以上のものを用いた請求項１記載の反射型液晶パネル。3. The polarization degree of the incident light side polarizing plate is 95%.
The reflective liquid crystal panel according to claim 1, wherein the above-mentioned ones are used.
率の大きい軸と、入射光側の偏光板の透過軸とのなす角
度を、４５度以上１３５度以下にした請求項１記載の反
射型液晶パネル。4. The angle between the axis of the liquid crystal molecules having a large refractive index in contact with the substrate on the incident light side and the transmission axis of the polarizing plate on the incident light side is 45 degrees or more and 135 degrees or less. Reflective liquid crystal panel.
晶層内に散布されているスペーサ粒子として酸化珪素系
のものを用いた請求項１記載の反射型液晶パネル。5. The reflection type liquid crystal panel according to claim 1, wherein silicon oxide-based particles are used as spacer particles dispersed in the liquid crystal layer in order to keep the liquid crystal layer at a constant layer thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5266962A JPH07120745A (en) | 1993-10-26 | 1993-10-26 | Reflection type liquid crystal panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5266962A JPH07120745A (en) | 1993-10-26 | 1993-10-26 | Reflection type liquid crystal panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07120745A true JPH07120745A (en) | 1995-05-12 |
Family
ID=17438125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5266962A Pending JPH07120745A (en) | 1993-10-26 | 1993-10-26 | Reflection type liquid crystal panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07120745A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081311A (en) * | 1996-05-15 | 2000-06-27 | Nec Corporation | Liquid crystal display apparatus having high wide visual angle and high contrast |
| JP2007328217A (en) * | 2006-06-09 | 2007-12-20 | Nitto Denko Corp | Liquid crystal panel and liquid crystal display apparatus |
| JP2008102227A (en) * | 2006-10-18 | 2008-05-01 | Nitto Denko Corp | Liquid crystal panel and liquid crystal display device |
| US7812901B2 (en) | 2006-05-29 | 2010-10-12 | Nitto Denko Corporation | Liquid crystal panel and liquid crystal display apparatus |
| KR101042868B1 (en) * | 2006-07-07 | 2011-06-20 | 닛토덴코 가부시키가이샤 | Liquid crystal panel and liquid crystal display device |
-
1993
- 1993-10-26 JP JP5266962A patent/JPH07120745A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081311A (en) * | 1996-05-15 | 2000-06-27 | Nec Corporation | Liquid crystal display apparatus having high wide visual angle and high contrast |
| US7812901B2 (en) | 2006-05-29 | 2010-10-12 | Nitto Denko Corporation | Liquid crystal panel and liquid crystal display apparatus |
| JP2007328217A (en) * | 2006-06-09 | 2007-12-20 | Nitto Denko Corp | Liquid crystal panel and liquid crystal display apparatus |
| KR101042868B1 (en) * | 2006-07-07 | 2011-06-20 | 닛토덴코 가부시키가이샤 | Liquid crystal panel and liquid crystal display device |
| US8531630B2 (en) | 2006-07-07 | 2013-09-10 | Nitto Denko Corporation | Liquid crystal panel and liquid crystal display apparatus |
| JP2008102227A (en) * | 2006-10-18 | 2008-05-01 | Nitto Denko Corp | Liquid crystal panel and liquid crystal display device |
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