JP3297606B2 - Color liquid crystal display panel - Google Patents
Color liquid crystal display panelInfo
- Publication number
- JP3297606B2 JP3297606B2 JP23879496A JP23879496A JP3297606B2 JP 3297606 B2 JP3297606 B2 JP 3297606B2 JP 23879496 A JP23879496 A JP 23879496A JP 23879496 A JP23879496 A JP 23879496A JP 3297606 B2 JP3297606 B2 JP 3297606B2
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- JP
- Japan
- Prior art keywords
- liquid crystal
- color
- polarizing plate
- plate
- crystal cell
- 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.)
- Expired - Fee Related
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、カラー液晶表示パ
ネルに関する。[0001] The present invention relates to a color liquid crystal display panel.
【０００２】[0002]
【従来の技術】従来の着色した表示が得られるカラー液
晶表示パネルは、カラーフィルターを備えた液晶セルと
この液晶セルを挟んで配置された一対の偏光板とからな
っている。カラーフィルターは上記液晶セルの一方の基
板に設けられており、基板上にカラーフィルターさらに
その上に透明電極が形成される。液晶セルは、ツイスト
配向処理が施され、電圧を印加するか、無印加であるか
で、液晶層は立ち上がり配向をするか、ツイスト配向の
ままであるかの２状態をとる。これに偏光板を組み合わ
せることにより、入射光を透過させてカラーフィルター
により着色された色の明表示となるか、入射光が遮断さ
れ、暗（黒）表示となる。2. Description of the Related Art A conventional color liquid crystal display panel capable of obtaining a colored display comprises a liquid crystal cell provided with a color filter and a pair of polarizing plates disposed so as to sandwich the liquid crystal cell. The color filter is provided on one of the substrates of the liquid crystal cell, and the color filter is formed on the substrate, and the transparent electrode is formed thereon. The liquid crystal cell is subjected to a twist alignment process, and the liquid crystal layer takes two states, that is, whether the liquid crystal layer rises or stays twisted depending on whether a voltage is applied or not. By combining this with a polarizing plate, the incident light is transmitted to provide a bright display of the color colored by the color filter, or the incident light is blocked, resulting in a dark (black) display.
【０００３】しかし、カラーフィルターを用いたカラー
液晶表示パネルは、カラーフィルターを用いて着色光を
得るものであるため、光の透過率が低く、表示が暗い。However, since a color liquid crystal display panel using a color filter obtains colored light using a color filter, the light transmittance is low and the display is dark.
【０００４】そこでカラーフィルターを用いずに、液晶
セルの液晶層の複屈折と偏光板とによって光を着色する
カラー液晶表示装置（特開平０６−３０８４８１）や、
液晶層だけでなく位相差板の複屈折も利用するカラー液
晶表示装置（特開平０６−１７５１２５、特開平０６−
３０１００６）が提案されている。Therefore, a color liquid crystal display device in which light is colored by a birefringence of a liquid crystal layer of a liquid crystal cell and a polarizing plate without using a color filter (JP-A-06-308481),
A color liquid crystal display device utilizing not only a liquid crystal layer but also birefringence of a retardation plate (Japanese Patent Application Laid-Open Nos. 06-175125 and 06-175125).
301006) has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】上記従来のカラーフィ
ルターを用いたカラー液晶表示装置は、光の透過率が低
いという課題を有しており、これはカラーフィルターで
の光の吸収による。The color liquid crystal display device using the above-mentioned conventional color filter has a problem that light transmittance is low, which is due to light absorption by the color filter.
【０００６】液晶セルの液晶層の複屈折と偏光板とによ
って光を着色するカラー液晶表示装置は、白色がやや色
づき、表示できる色数が少なく、色の色純度が低い。A color liquid crystal display device in which light is colored by the birefringence of a liquid crystal layer of a liquid crystal cell and a polarizing plate has a little white color, a small number of displayable colors, and low color purity.
【０００７】液晶層だけでなく位相差板の複屈折も利用
するカラー液晶表示装置は、白色がやや色づき、表示で
きる色の色純度が低い。A color liquid crystal display device that utilizes not only the liquid crystal layer but also the birefringence of a retardation plate has a white color that is slightly colored and has low color purity of a displayable color.
【０００８】本発明は、カラーフィルターを用いずに透
過光を着色し、白色の色づきを抑え、色純度の良いカラ
ー液晶表示パネルを提供することを目的とする。It is an object of the present invention to provide a color liquid crystal display panel having good color purity by coloring transmitted light without using a color filter, suppressing white coloring.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
に、本発明のカラー液晶表示パネルは、カラーフィルタ
ーを用いずにカラー表示させるカラー液晶表示パネルに
おいて、対向面に透明電極が形成された２枚の上下電極
基板間に液晶を挟持し、前記液晶の分子を上下電極基板
間で２００゜〜２７０゜ツイスト配向させ、前記液晶の
光学異方性△ｎLCと、前記液晶の液晶層厚ｄLC（μｍ）
との積△ｎLC・ｄLCを１．２μｍ〜１．９μｍとした液
晶セルと、前記液晶セルを挟んで配置された２枚の偏光
板と、前記液晶セルと表面側の偏光板との間に配置され
た１枚のポリカーボネイトの位相差板とからなり、前記
位相差板の屈折率異方性△ｎFと板厚ｄFとの積△ｎF・
ｄFが、△ｎLC・ｄLC−（０．１０μｍ〜０．２０μ
ｍ）である。In order to solve the above problems, a color liquid crystal display panel according to the present invention comprises a color filter.
Color LCD panel for color display without using
A liquid crystal is sandwiched between two upper and lower electrode substrates each having a transparent electrode formed on the opposing surface, molecules of the liquid crystal are twisted between 200 ° and 270 ° between the upper and lower electrode substrates, and the optical anisotropy of the liquid crystal is adjusted. △ n LC and the liquid crystal layer thickness d LC (μm) of the liquid crystal
A liquid crystal cell having a product Δn LC · d LC of 1.2 μm to 1.9 μm, two polarizing plates disposed so as to sandwich the liquid crystal cell, and a liquid crystal cell and a front-side polarizing plate. made up of one of the phase difference plate of polycarbonate arranged between the product of the refractive index anisotropy △ n F and the plate thickness d F of the retardation plate △ n F ·
d F is Δn LC · d LC − (0.10 μm to 0.20 μm
m).
【００１０】また、カラーフィルターを用いずにカラー
表示させるカラー液晶表示パネルにおいて、対向面に透
明電極が形成された２枚の上下電極基板間に液晶を挟持
し、前記液晶の分子を上下電極基板間で２００゜〜２７
０゜ツイスト配向させ、前記液晶の光学異方性△ｎ
LCと、前記液晶の液晶層厚ｄLC（μｍ）との積△ｎLC・
ｄLCを１．２μｍ〜１．８μｍとした液晶セルと、前記
液晶セルを挟んで配置された２枚の偏光板と、前記液晶
セルと表面側の偏光板との間に配置された少なくとも２
枚のポリカーボネイトの位相差板とからなり、前記位相
差板の屈折率異方性△ｎFと板厚ｄFとの積△ｎF・ｄFの
総和が、△ｎLC・ｄLC−（０．１０μｍ〜０．２０μ
ｍ）である。 （０．１０μｍ〜０．２０μｍ）である。[0010] Also, without using a color filter,
In a color liquid crystal display panel to be displayed, a liquid crystal is sandwiched between two upper and lower electrode substrates having transparent electrodes formed on opposing surfaces, and molecules of the liquid crystal are transferred between the upper and lower electrode substrates by 200 to 27 degrees.
0 ° twist alignment, and the optical anisotropy of the liquid crystal Δn
The product of LC and the liquid crystal layer thickness d LC (μm) of the liquid crystal △ n LC ·
a liquid crystal cell in which the d LC and 1.2Myuemu～1.8Myuemu, the two polarizing plates disposed to sandwich the liquid crystal cell, at least 2 arranged between the polarizing plate of the liquid crystal cell and the front side
Sheets made from a phase difference plate polycarbonate, sum of products △ n F · d F of the refractive index anisotropy △ n F and the plate thickness d F of the retardation plate, △ n LC · d LC - ( 0.10μm ~ 0.20μ
m). (0.10 μm to 0.20 μm).
【００１１】また、カラーフィルターを用いずにカラー
表示させるカラー液晶表示パネルにおいて、対向面に透
明電極が形成された２枚の上下電極基板間に液晶を挟持
し、前記液晶の分子を上下電極基板間で２００゜〜２７
０゜ツイスト配向させ、前記液晶の光学異方性△ｎ
LCと、前記液晶の液晶層厚ｄLC（μｍ）との積△ｎLC・
ｄLCを１．９μｍとした液晶セルと、前記液晶セルを挟
んで配置された２枚の偏光板と、前記液晶セルと表面側
の偏光板との間に配置された１枚のポリカーボネイトの
位相差板とからなり、前記位相差板の屈折率異方性△ｎ
Fと、前記位相差板の板厚ｄFとの積の、△ｎF・ｄFが、
△ｎLC・ｄLC−（０．１０μｍ〜０．２０μｍ）の関係
を有し、前記△ｎF・ｄFが、１．７２６μｍである。[0011] Also, without using a color filter,
In a color liquid crystal display panel to be displayed, a liquid crystal is sandwiched between two upper and lower electrode substrates having transparent electrodes formed on opposing surfaces, and molecules of the liquid crystal are transferred between the upper and lower electrode substrates by 200 to 27 degrees.
0 ° twist alignment, and the optical anisotropy of the liquid crystal Δn
The product of LC and the liquid crystal layer thickness d LC (μm) of the liquid crystal △ n LC ·
d LC having a liquid crystal cell of 1.9 μm, two polarizers interposed between the liquid crystal cells, and one polycarbonate disposed between the liquid crystal cell and the front polarizer. A retardation plate, the refractive index anisotropy of the retardation plate △ n
And F, the product of the thickness d F of the retardation plate, △ n F · d F is,
Δn LC × d LC − (0.10 μm to 0.20 μm), and the Δn F × d F is 1.726 μm.
【００１２】また、カラーフィルターを用いずにカラー
表示させるカラー液晶表示パネルにおいて、対向面に透
明電極が形成された２枚の上下電極基板間に液晶を挟持
し、前記液晶の分子を上下電極基板間で２００゜〜２７
０゜ツイスト配向させ、前記液晶の光学異方性△ｎ
LCと、前記液晶の液晶層厚ｄLC（μｍ）との積△ｎLC・
ｄLCを１．８μｍとした液晶セルと、前記液晶セルを挟
んで配置された２枚の偏光板と、前記液晶セルと表面側
の偏光板との間に配置された少なくとも２枚のポリカー
ボネイトの位相差板とからなり、前記位相差板の屈折率
異方性△ｎFと、前記位相差板の板厚ｄFとの積の、△ｎ
F・ｄFの総和が、△ｎLC・ｄLC−（０．１０μｍ〜０．
２０μｍ）の関係を有し、前記△ｎF・ｄFの総和が、
１．６５０μｍである。Also, without using a color filter,
In a color liquid crystal display panel to be displayed, a liquid crystal is sandwiched between two upper and lower electrode substrates having transparent electrodes formed on opposing surfaces, and molecules of the liquid crystal are transferred between the upper and lower electrode substrates by 200 to 27 degrees.
0 ° twist alignment, and the optical anisotropy of the liquid crystal Δn
The product of LC and the liquid crystal layer thickness d LC (μm) of the liquid crystal △ n LC ·
d LC of 1.8 μm, two polarizing plates interposed between the liquid crystal cells, and at least two polycarbonates disposed between the liquid crystal cell and the front-side polarizing plate. A retardation plate, and the product of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F of the retardation plate, Δn
The sum of F · d F is Δn LC · d LC − (0.10 μm to 0.
20 μm), and the sum of Δn F · d F is
1.650 μm.
【００１３】なお、位相差板の配置が、表面側偏光板に
隣接する位相差板の遅相軸に対して、液晶セルに隣接す
る位相差板の遅相軸を３０゜以内ずらす。[0013] The arrangement of the phase difference plate, with respect to the slow axis of the retardation plate adjacent to the surface side polarizing plate, shifting the slow axis of the retardation plate adjacent to the liquid crystal cell within 30 °.
【００１４】なお、表面側の偏光板の単体の色相（Ｈｕ
ｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、ａが−２．
０〜＋２．０、ｂが−８．０〜０．０の範囲とする。[0014] Incidentally, single hue of the surface side polarizing plate (Hu
lab color system, NBS unit).
0 to +2.0, b is in the range of -8.0 to 0.0.
【００１５】なお、裏面側に配置された偏光板の外側に
反射板が設けられている。 Incidentally , a reflection plate is provided outside the polarizing plate disposed on the back side.
【００１６】[0016]
【発明の実施の形態】以下、実施の形態を用いて本発明
の詳細を示す。また、参考例も説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below using embodiments. Reference examples will also be described.
【００１７】（参考例１） 以下、参考例１を図１〜図３を参照して説明する。Reference Example 1 Hereinafter, Reference Example 1 will be described with reference to FIGS.
【００１８】図１に参考例１のカラー液晶表示パネルの
断面図を示す。このカラー液晶表示パネルは液晶分子４
をツイスト配向させた１つの液晶セル６と、液晶セル６
を挟んで配置された一対の偏光板１、５とからなる。FIG. 1 is a sectional view of a color liquid crystal display panel of Reference Example 1. This color liquid crystal display panel has four liquid crystal molecules.
Liquid crystal cell 6 in which is twist-aligned, and liquid crystal cell 6
And a pair of polarizing plates 1 and 5 arranged with the pair interposed therebetween.
【００１９】上記液晶セル６は、単純マトリクス型であ
り、表面側透明基板２上の電極３は互いに平行に形成さ
れた複数本の走査電極、裏面側透明基板２上の電極３は
前記走査電極と直交する方向に形成された複数本の信号
電極の上に配向膜を塗布し、両基板間に粒径７．０μｍ
のスペーサーを散布し、周辺部にシール剤を印刷後貼り
合わせた。カイラルピッチ１８．４２μｍのトラン系ネ
マティック液晶（△ｎ＝０．２）を真空注入後、封止し
た。The liquid crystal cell 6 is of a simple matrix type. The electrodes 3 on the front transparent substrate 2 are a plurality of scanning electrodes formed in parallel with each other, and the electrodes 3 on the rear transparent substrate 2 are the scanning electrodes. An orientation film is applied on a plurality of signal electrodes formed in a direction perpendicular to the substrate, and a particle size of 7.0 μm
Was sprayed, and a sealant was printed on the periphery and then bonded. A trans nematic liquid crystal (Δn = 0.2) having a chiral pitch of 18.42 μm was sealed after vacuum injection.
【００２０】図２は上記液晶セル６の液晶分子配向方向
９、１０と、一対の偏光板の透過軸８、１１とを示す平
面図である。表面側透明基板の液晶分子配向方向９、裏
面側透明基板の液晶分子配向方向１０と基準線７との角
度をθ１＝１６５゜、θ２＝１９５゜とし、裏面側から
表面側に向かって液晶分子をほぼ１５０゜のツイスト角
でツイスト配向させた。表面側偏光板の透過軸８、裏面
側偏光板の透過軸１１と基準線７との角度をξ１＝１２
０゜、ξ２＝６０゜とした。FIG. 2 is a plan view showing liquid crystal molecule alignment directions 9 and 10 of the liquid crystal cell 6 and transmission axes 8 and 11 of a pair of polarizing plates. The angle between the liquid crystal molecule orientation direction 9 of the front side transparent substrate, the liquid crystal molecule orientation direction 10 of the back side transparent substrate and the reference line 7 is θ1 = 165 °, θ2 = 195 °, and the liquid crystal molecules are oriented from the back side to the front side. Was twist-oriented at a twist angle of about 150 °. The angle between the transmission axis 8 of the front-side polarizing plate, the transmission axis 11 of the rear-side polarizing plate and the reference line 7 is ξ1 = 12.
0 ° and {2 = 60}.
【００２１】表面側偏光板１には、偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、
（ａ，ｂ）≒（０．５，−７．０）とするＮＰＦ−Ｆ１
０２５ＤＵ（日東電工（株）製）を用いた。The hue (Hunter's Lab color system, NBS unit) of the polarizing plate alone is applied to the front-side polarizing plate 1.
NPF-F1 where (a, b) ≒ (0.5, −7.0)
025DU (manufactured by Nitto Denko Corporation) was used.
【００２２】上記構成のカラー液晶表示パネルにおいて
は、液晶セルの液晶分子がツイスト配向している状態で
は、一方の偏光板を通って液晶セルに入射した直線偏光
が、液晶セルを通る過程で液晶セルの複屈折により楕円
偏光となり、他方の偏光板に入射する。In the color liquid crystal display panel having the above structure, in a state where the liquid crystal molecules of the liquid crystal cell are twisted, the linearly polarized light incident on the liquid crystal cell through one polarizing plate passes through the liquid crystal cell while passing through the liquid crystal cell. The light becomes elliptically polarized light due to the birefringence of the cell, and enters the other polarizing plate.
【００２３】液晶セルの電極間に電圧を印加すると、液
晶分子の配向状態の変化により液晶セルでの複屈折が変
化するため、電圧無印加状態とは異なる偏光状態の光と
なって他方の偏光板に入射し、さらに液晶分子がほぼ垂
直に立ち上がると液晶セルによる複屈折がほとんどなく
なり、一方の偏光板を通って入射してきた直線偏光はそ
の偏光状態のまま他方の偏光板に入射する。When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence in the liquid crystal cell changes due to a change in the alignment state of the liquid crystal molecules. When the light enters the plate and the liquid crystal molecules rise almost vertically, the birefringence of the liquid crystal cell hardly disappears, and the linearly polarized light that has entered through one polarizing plate enters the other polarizing plate in the same polarization state.
【００２４】一方の偏光板に入射する光が、他方の偏光
板出射後と同じ直線偏光であれば、全ての波長光が偏光
板を透過するため、このときは出射光が無着色光とな
る。If the light incident on one of the polarizing plates is the same linearly polarized light as the light emitted from the other polarizing plate, all the wavelengths of light pass through the polarizing plate. In this case, the emitted light is uncolored light. .
【００２５】また、他方の偏光板に入射する光が楕円偏
光であるときは、その光のうち偏光板を透過する偏光成
分の波長光だけが他方の偏光板を透過して、この出射光
がその波長帯域に対応した着色光になる。When the light incident on the other polarizing plate is elliptically polarized light, of the light, only the light having the wavelength of the polarized light component transmitted through the polarizing plate is transmitted through the other polarizing plate, and the emitted light is It becomes colored light corresponding to the wavelength band.
【００２６】この他方の偏光板を通って出射する光の波
長帯域は、前記偏光板に入射する楕円偏光の偏光状態に
よって異なるため、液晶セルへの印加電圧を制御して前
記楕円偏光の偏光状態を変化させてやれば、上記着色光
の色を変化させることができる。Since the wavelength band of the light emitted through the other polarizing plate differs depending on the polarization state of the elliptically polarized light incident on the polarizing plate, the voltage applied to the liquid crystal cell is controlled to control the polarization state of the elliptically polarized light. Is changed, the color of the colored light can be changed.
【００２７】また、液晶層の△ｎLC・ｄLCを１．４μ
ｍ、１５０゜ツイスト配向にした場合、無印加状態で、
一方の偏光板に入射する光が他方の偏光板出射後とほぼ
等しい直線偏光となるので白色により近い色を表示でき
る。Further, Δn LC · d LC of the liquid crystal layer is 1.4 μm.
m, 150 ° twist orientation, when no voltage is applied,
Since the light incident on one of the polarizing plates becomes linearly polarized light substantially equal to that after exiting the other polarizing plate, a color closer to white can be displayed.
【００２８】上記構成のカラー液晶表示パネルにバック
ライトを設置し、電圧を印加した際の着色光の色変化を
示すＣＩＥ色度図を図３に示す。FIG. 3 is a CIE chromaticity diagram showing a color change of colored light when a backlight is installed on the color liquid crystal display panel having the above-described structure and a voltage is applied.
【００２９】従来のカラー液晶表示パネル（特開平６−
３０８４８１）におけるＣＩＥ色度座標（ｘ、ｙ）は、
白色（０．３６、０．２９）、赤色（０．４６，０．３
９）、青色（０．２５、０．２２）であるが、図３よ
り、本実施の形態のパネル構成とすることによって、無
印加時のＣＩＥ色度座標（ｘ、ｙ）が（０．３３、０．
３４）であり、従来パネルよりＤ６５白色光源（０．３
１２７、０．３２９１）に近く、赤色（０．５０、０．
３４）と青色（０．１９、０．１５）と色純度も良いカ
ラー液晶表示パネルを、カラーフィルター無しなので低
コストで提供できる。A conventional color liquid crystal display panel (Japanese Unexamined Patent Publication No.
308481), the CIE chromaticity coordinates (x, y) are
White (0.36, 0.29), red (0.46, 0.3
9) and blue (0.25, 0.22), but from FIG. 3, the CIE chromaticity coordinates (x, y) when no voltage is applied (0. 33, 0.
34), and a D65 white light source (0.3
127, 0.3291) and red (0.50, 0.
34), and a color liquid crystal display panel having good color purity (0.19, 0.15) and blue (0.19, 0.15) can be provided at low cost because there is no color filter.
【００３０】また、ツイスト角が１５０゜と浅く、液晶
分子も配向が安定しやすく、表示容量の小さいため、低
デユーティー向きである。Further, the twist angle is as shallow as 150 °, the orientation of liquid crystal molecules is easily stabilized, and the display capacity is small.
【００３１】なお、参考例１では、液晶セル６として液
晶分子４のツイスト角をほぼ１５０゜とし、液晶層の△
ｎLC・ｄLCを１．４０μｍとしたが、この液晶セル６
は、液晶分子４を１００゜〜２７０゜のツイスト角でツ
イスト配向させてもよく、液晶層の△ｎLC・ｄLCは１．
２μｍ〜２．２μｍであればよい。In the first embodiment, the twist angle of the liquid crystal molecules 4 of the liquid crystal cell 6 is set to approximately 150 °, and the twist angle of the liquid crystal layer is set to 150 °.
n LC · d LC was set to 1.40 μm.
The liquid crystal molecules 4 may be twist-oriented at a twist angle of 100 ° to 270 °, and the {n LC · d LC of the liquid crystal layer is 1.
What is necessary is just 2 micrometers-2.2 micrometers.
【００３２】無印加時により視感度の強い黄色を抑制
し、かつ色づきの少ない白い表示を得るためには、表面
側偏光板の単体の色相（ＨｕｎｔｅｒのＬａｂ表色系、
ＮＢＳ単位）を、ａが−２．０〜＋２．０、ｂが−８．
０〜０．０の範囲とすることが望ましい。In order to suppress yellow with high luminosity and to obtain a white display with little coloring when no voltage is applied, it is necessary to use a single hue (Hunter's Lab color system,
A) is -2.0 to +2.0, b is -8.
It is desirable to set it in the range of 0 to 0.0.
【００３３】また、参考例１では、偏光板の透過軸８、
１１と、各偏光板隣接基板の液晶分子配向方向９、１０
とのずれ角を４５゜としたが、このずれ角は４５゜±１
０゜とするのが望ましい。In Reference Example 1, the transmission axis 8 of the polarizing plate
11 and the liquid crystal molecule orientation directions 9 and 10 of the substrates adjacent to each polarizing plate.
Is set to 45 °, but this shift angle is 45 ° ± 1.
It is desirable to be 0 °.
【００３４】また、参考例１では、カラー液晶表示パネ
ルにバックライトを設置した透過型としたが、裏面側偏
光板の外側に反射板を貼ることにより反射型のカラー液
晶表示パネルとしてもよい。In the first embodiment, a transmissive color liquid crystal display panel is provided with a backlight. However, a reflective color liquid crystal display panel may be formed by attaching a reflective plate to the outside of a rear-side polarizing plate.
【００３５】また、参考例１では、液晶セルの表面側に
直接偏光板を配置したが、液晶セルと表面側の偏光板と
の間に少なくとも１枚の位相差板を配置してもよい。位
相差板を配置した場合、液晶セルの隣接位相差板の遅相
軸を、液晶セルの位相差板隣接基板側における液晶分子
配向方向に対して９０゜±１０゜ずらし、さらに、表面
側偏光板の透過軸を、前記偏光板の隣接位相差板の遅相
軸に対して４５゜±１０゜斜めにずらすことが望まし
い。さらに、位相差板に三次元屈折率制御品を用いるこ
とが望ましい。In the first embodiment, the polarizing plate is disposed directly on the surface of the liquid crystal cell. However, at least one retardation plate may be disposed between the liquid crystal cell and the polarizing plate on the surface. When a retardation plate is disposed, the slow axis of the retardation plate adjacent to the liquid crystal cell is shifted by 90 ° ± 10 ° with respect to the liquid crystal molecule alignment direction on the substrate adjacent to the retardation plate of the liquid crystal cell. It is desirable to shift the transmission axis of the plate obliquely by 45 ° ± 10 ° with respect to the slow axis of the phase difference plate adjacent to the polarizing plate. Further, it is desirable to use a three-dimensional refractive index controlled product for the retardation plate.
【００３６】（実施の形態１） 以下、第１の発明の実施の形態を図４〜図６を参照して
説明する。Embodiment 1 Hereinafter, an embodiment of the first invention will be described with reference to FIGS.
【００３７】図４に第１の発明の実施の形態および参考
例３のカラー液晶表示パネルの断面図を示す。このカラ
ー液晶表示パネルは、液晶分子４をツイスト配向させた
１つの液晶セル６と、液晶セル６を挟んで配置された一
対の偏光板１、５と、液晶セル６と表面側の偏光板１と
の間に配置された１枚の位相差板１２とからなる。FIG. 4 is a sectional view of a color liquid crystal display panel according to the first embodiment of the present invention and the third embodiment. This color liquid crystal display panel includes one liquid crystal cell 6 in which liquid crystal molecules 4 are twist-aligned, a pair of polarizing plates 1 and 5 arranged with the liquid crystal cell 6 interposed therebetween, and a liquid crystal cell 6 and a polarizing plate 1 on the front side. And one retardation plate 12 disposed between the two.
【００３８】上記液晶セル６は、単純マトリクス型であ
り、表面側透明基板２上の電極３は互いに平行に形成さ
れた複数本の走査電極、裏面側透明基板２上の電極３は
前記走査電極と直交する方向に形成された複数本の信号
電極の上に配向膜を塗布し、両基板間に粒径９．５μｍ
のスペーサーを散布し、周辺部にシール剤を印刷後貼り
合わせた。カイラルピッチ１５．８μｍのトラン系ネマ
ティック液晶（△ｎLC＝０．２）を真空注入後、封止し
た。The liquid crystal cell 6 is of a simple matrix type. The electrodes 3 on the front transparent substrate 2 are a plurality of scanning electrodes formed in parallel with each other, and the electrodes 3 on the rear transparent substrate 2 are scanning electrodes. An orientation film is applied on a plurality of signal electrodes formed in a direction perpendicular to the direction of the substrate, and a particle size between the two substrates is 9.5 μm.
Was sprayed, and a sealant was printed on the periphery and then bonded. A trans-nematic liquid crystal (Δn LC = 0.2) having a chiral pitch of 15.8 μm was sealed after vacuum injection.
【００３９】図５は、上記液晶セル６の液晶分子配向方
向９、１０と、１枚のポリカーボネート一軸延伸位相差
板の遅相軸方向１４と、一対の偏光板の透過軸８、１１
とを示す平面図である。表面側透明基板の液晶分子配向
方向９、裏面側透明基板の液晶分子配向方向１０と基準
線７との角度をθ１＝２１５゜、θ２＝１４５゜とし、
裏面側から表面側に向かって液晶分子４を、ほぼ２５０
゜のツイスト角でツイスト配向させた。一軸延伸位相差
板の遅相軸方向１４と基準線７との角度をψ１＝１２１
゜、△ｎF１・ｄF１＝１．７２６μｍとした。表面側偏
光板の透過軸８、裏面側偏光板の透過軸１１と基準線７
との角度をξ１＝７６゜、ξ２＝１００゜とした。FIG. 5 shows the liquid crystal molecule alignment directions 9 and 10 of the liquid crystal cell 6, the slow axis direction 14 of one polycarbonate uniaxially stretched retardation plate, and the transmission axes 8 and 11 of a pair of polarizing plates.
FIG. The angle between the liquid crystal molecule orientation direction 9 of the front side transparent substrate, the liquid crystal molecule orientation direction 10 of the back side transparent substrate and the reference line 7 is θ1 = 215 °, θ2 = 145 °,
The liquid crystal molecules 4 are moved from the back side to the front side by approximately 250
Twist orientation was performed at a twist angle of ゜. The angle between the slow axis direction 14 of the uniaxially stretched phase difference plate and the reference line 7 is ψ1 = 121
゜, Δn F 1 · d F 1 = 1.726 μm. Transmission axis 8 of front-side polarizing plate, transmission axis 11 of back-side polarizing plate, and reference line 7
And {1 = 76} and {2 = 100}.
【００４０】表面側偏光板１には、偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、
（ａ，ｂ）≒（−１．０，＋２．０）とするＮＰＦ−Ｇ
１２２５ＤＵ（日東電工（株）製）を用いた。The hue of the polarizing plate alone (Hunter's Lab color system, NBS unit) is
NPF-G where (a, b) ≒ (−1.0, + 2.0)
1225DU (manufactured by Nitto Denko Corporation) was used.
【００４１】上記カラー液晶表示パネルは、位相差板の
複屈折によって透過光を着色するとともに、この位相差
板の複屈折と、液晶分子をツイスト配向させている液晶
の複屈折とによって透過光を他の色に着色するものであ
る。In the color liquid crystal display panel, the transmitted light is colored by the birefringence of the retardation plate, and the transmitted light is transmitted by the birefringence of the retardation plate and the birefringence of the liquid crystal in which the liquid crystal molecules are twisted. It is colored in another color.
【００４２】液晶セルの電極間に電圧を印加していない
状態では、一方の偏光板を通って入射した光が、ツイス
ト配向させた液晶分子の複屈折と位相差板の複屈折とに
より、他方の偏光板を透過すると、無着色光になる。When no voltage is applied between the electrodes of the liquid crystal cell, the light incident through one of the polarizing plates is changed by the birefringence of the twisted liquid crystal molecules and the birefringence of the retardation plate. When the light is transmitted through the polarizing plate, the light becomes uncolored light.
【００４３】液晶セルの電極間に電圧を印加すると、液
晶分子の配向状態の変化に対応して液晶セルでの複屈折
が変化するため、位相差板と液晶セルとの両方の複屈折
による着色光の色が変化する。When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence in the liquid crystal cell changes in response to the change in the alignment state of the liquid crystal molecules. Therefore, coloring due to the birefringence of both the retardation plate and the liquid crystal cell. The color of the light changes.
【００４４】さらに電圧を印加して、液晶分子が基板面
に対してほぼ垂直に立ち上がると、液晶セルによる複屈
折がほとんどなくなって、他方の偏光板を透過した光
が、位相差板の複屈折のみによる着色光になる。When a voltage is further applied and the liquid crystal molecules rise almost perpendicularly to the substrate surface, the birefringence of the liquid crystal cell almost disappears, and the light transmitted through the other polarizing plate becomes the birefringence of the retardation plate. It becomes colored light only by.
【００４５】また、液晶層の△ｎLC・ｄLCを１．９μ
ｍ、２５０゜ツイスト配向させ、位相差板の屈折率異方
性△ｎFと板厚ｄFとの積△ｎF・ｄFが１．７２６μｍと
した場合、オフ電圧印加状態で、一方の偏光板に入射す
る光が他方の偏光板出射後とほぼ等しい直線偏光となる
ので白色により近い色を表示できる。The Δn LC · d LC of the liquid crystal layer was 1.9 μm.
m, 250 ° is twisted, if the product △ n F · d F of the refractive index anisotropy △ n F and the plate thickness d F of the phase difference plate was 1.726Myuemu, the off voltage applied state, the one Since the light incident on the polarizing plate becomes linearly polarized light substantially equal to that after exiting the other polarizing plate, a color closer to white can be displayed.
【００４６】上記構成のカラー液晶表示パネルにバック
ライトを設置し、（１／２００）〜（１／２４０）デユ
ーティー、（１／１４）〜（１／１７）バイアスで電圧
駆動させ、各階調はフレームレートコントロール法によ
り制御した。A backlight is installed on the color liquid crystal display panel having the above configuration, and is driven by a voltage of (1/200) to (1/240) duty and (1/14) to (1/17) bias. It was controlled by the frame rate control method.
【００４７】電圧を印加した際の着色光の色変化を示す
ＣＩＥ色度図を図６に示す。従来のカラー液晶表示パネ
ル（特開平６−３０８４８１）におけるＣＩＥ色度座標
（ｘ、ｙ）は、白色（０．３６、０．２９）、赤色
（０．４６，０．３９）、青色（０．２５、０．２
２）、緑色（０．２７、０．４７）であるが、図６よ
り、本実施の形態のパネル構成とすることによって、オ
フ電圧印加時のＣＩＥ色度座標（ｘ、ｙ）が（０．３
３、０．３５）であり、従来パネルよりＤ６５白色光源
（０．３１２７、０．３２９１）に近く、赤色（０．４
８、０．３０）、青色（０．２２、０．２１）、緑色
（０．３３、０．５０）と色純度のよいカラー液晶表示
パネルを提供できる。FIG. 6 is a CIE chromaticity diagram showing a color change of colored light when a voltage is applied. The CIE chromaticity coordinates (x, y) of a conventional color liquid crystal display panel (JP-A-6-308481) are white (0.36, 0.29), red (0.46, 0.39), blue (0, 0). .25, 0.2
2) and green (0.27, 0.47), and FIG. 6 shows that the CIE chromaticity coordinates (x, y) when the off-voltage is applied are (0, 0) by adopting the panel configuration of the present embodiment. .3
3, 0.35), which is closer to the D65 white light source (0.3127, 0.3291) and red (0.4
8, 0.30), blue (0.22, 0.21) and green (0.33, 0.50).
【００４８】なお、本実施の形態では、液晶セル６とし
て液晶分子４のツイスト角をほぼ２５０゜とし、液晶層
の△ｎLC・ｄLCを１．９０μｍとし、１枚の位相差板１
２の△ｎF・ｄFは１．７２６μｍとしたが、この液晶セ
ル６は、液晶分子４を２００゜〜２７０゜のツイスト角
でツイスト配向させてもよく、液晶層の△ｎLC・ｄLCは
１．２μｍ〜２．２μｍであればよく、位相差板の屈折
率異方性△ｎFと板厚ｄFとの積△ｎF・ｄFが、△ｎLC・
ｄLC−（０．１０μｍ〜０．２０μｍ）の範囲であれば
よい。In the present embodiment, the liquid crystal cell 6 has a twist angle of the liquid crystal molecules 4 of about 250 °, the liquid crystal layer has a Δn LC · d LC of 1.90 μm, and a single retardation plate 1.
2 of △ n F · d F was a 1.726Myuemu, the liquid crystal cell 6 may also be twisted liquid crystal molecules 4 at 200 ° to 270 ° twist angle of the liquid crystal layer △ n LC · d LC may be from 1.2 μm to 2.2 μm, and the product Δn F · d F of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F is Δn LC ·
d LC - may be in a range of (0.10μm~0.20μm).
【００４９】また、本実施の形態では、表面側偏光板１
に単体の色相が（ａ，ｂ）≒（−１．０，＋２．０）と
なる偏光板を用いたが、オフ電圧印加時により視感度の
強い黄色を抑制し、かつ色づきの少ない白い表示を得る
ためには、表面側偏光板の偏光板単体の色相（Ｈｕｎｔ
ｅｒのＬａｂ表色系、ＮＢＳ単位）を、ａが−２．０〜
＋２．０、ｂが−８．０〜０．０の範囲とする表面側偏
光板を用いることが望ましい。In this embodiment, the front-side polarizing plate 1
Used a polarizing plate whose hue is (a, b) ≒ (−1.0, + 2.0). However, when an off-voltage is applied, yellow with high luminosity is suppressed, and white display with little coloring is performed. In order to obtain the hue (Hunt) of the polarizing plate alone of the front-side polarizing plate,
er Lab color system, NBS unit), a is -2.0 to
It is desirable to use a front-side polarizing plate having +2.0 and b in the range of -8.0 to 0.0.
【００５０】また、本実施の形態では、表面側偏光板と
位相差板の配置において、液晶セルの位相差板隣接基板
側における液晶分子配向方向に対する液晶セルの隣接位
相差板の遅相軸のずれ角を９４゜としたが、このずれ角
は９０゜±１０゜とすることが望ましい。Further, in the present embodiment, in the arrangement of the front-side polarizing plate and the retardation plate, the slow axis of the adjacent retardation plate of the liquid crystal cell with respect to the liquid crystal molecule alignment direction on the side of the substrate adjacent to the retardation plate of the liquid crystal cell. Although the shift angle is 94 °, the shift angle is desirably 90 ° ± 10 °.
【００５１】さらに、表面側偏光板の隣接位相差板の遅
相軸に対する表面側偏光板の透過軸のずれ角を４５゜と
したが、このずれ角はを、４５゜±１０゜とすることが
望ましい。Further, the shift angle of the transmission axis of the front-side polarizing plate with respect to the slow axis of the phase difference plate adjacent to the front-side polarizing plate was set to 45 °, and this shift angle was set to 45 ° ± 10 °. Is desirable.
【００５２】また、本実施の形態では、裏面側偏光板の
透過軸１１と、裏面側の偏光板隣接基板の液晶分子配向
方向１０とのずれ角を４５゜としたが、このずれ角は４
５゜±１０゜とするのが、望ましい。In this embodiment, the angle of deviation between the transmission axis 11 of the rear-side polarizing plate and the liquid crystal molecule orientation direction 10 of the substrate adjacent to the rear-side polarizing plate is 45 °.
It is desirable to be 5 ± 10 °.
【００５３】また、本実施の形態では、カラー液晶表示
パネルにバックライトを設置した透過型としたが、裏面
側偏光板の外側に反射板を貼ることにより反射型のカラ
ー液晶表示パネルとしてもよい。反射型のカラー液晶表
示パネルとした場合、裏面側偏光板の透過軸１１と、反
射板１６に隣接した偏光板隣接基板の液晶分子配向方向
１０とのずれ角を４５゜±１０゜とするのが、望まし
い。In this embodiment, the color liquid crystal display panel is of a transmission type in which a backlight is provided. However, a reflection type color liquid crystal display panel may be provided by attaching a reflection plate outside the back side polarizing plate. . In the case of a reflective type color liquid crystal display panel, the deviation angle between the transmission axis 11 of the rear-side polarizing plate and the liquid crystal molecule orientation direction 10 of the polarizing plate adjacent substrate adjacent to the reflecting plate 16 is set to 45 ° ± 10 °. But desirable.
【００５４】また、より視野角の広いカラー液晶表示パ
ネルとするために、一軸延伸位相差板１２に、パネルを
正面から見た場合の複屈折とパネルを角度をつけて見た
場合の複屈折の差が小さくすることができる三次元屈折
率制御品を用いることが、望ましい。Further, in order to obtain a color liquid crystal display panel having a wider viewing angle, the birefringence when the panel is viewed from the front and the birefringence when the panel is viewed at an angle are provided on the uniaxially stretched retardation plate 12. It is desirable to use a three-dimensional refractive index controlled product that can reduce the difference between the two.
【００５５】（実施の形態２） 以下、第２の発明の実施の形態を図７〜図９を参照して
説明する。Embodiment 2 Hereinafter, an embodiment of the second invention will be described with reference to FIGS.
【００５６】図７に第２の発明の実施の形態および参考
例３のカラー液晶表示パネルの断面図を示す。このカラ
ー液晶表示パネルは、液晶分子４をツイスト配向させた
１つの液晶セル６と、液晶セル６を挟んで配置された一
対の偏光板１、５と、液晶セル６と表面側の偏光板１と
の間に配置された２枚の位相差板１２、１３とからな
る。FIG. 7 is a cross-sectional view of a color liquid crystal display panel according to the second embodiment and the third embodiment. This color liquid crystal display panel includes one liquid crystal cell 6 in which liquid crystal molecules 4 are twist-aligned, a pair of polarizing plates 1 and 5 arranged with the liquid crystal cell 6 interposed therebetween, and a liquid crystal cell 6 and a polarizing plate 1 on the front side. And two retardation plates 12 and 13 disposed between the two.
【００５７】上記液晶セル６は、単純マトリクス型であ
り、表面側透明基板２上の電極３は互いに平行に形成さ
れた複数本の走査電極、裏面側透明基板２上の電極３は
前記走査電極と直交する方向に形成された複数本の信号
電極の上に配向膜を塗布し、両基板間に粒径９．０μｍ
のスペーサーを散布し、周辺部にシール剤を印刷後貼り
合わせた。カイラルピッチ１５．０μｍのトラン系ネマ
ティック液晶（△ｎLC＝０．２）を真空注入後、封止し
た。The liquid crystal cell 6 is of a simple matrix type. The electrodes 3 on the front transparent substrate 2 are a plurality of scanning electrodes formed in parallel with each other, and the electrodes 3 on the rear transparent substrate 2 are the scanning electrodes. An alignment film is applied on a plurality of signal electrodes formed in a direction perpendicular to the substrate, and a particle size of 9.0 μm
Was sprayed, and a sealant was printed on the periphery and then bonded. A trans nematic liquid crystal (の n LC = 0.2) having a chiral pitch of 15.0 μm was sealed after vacuum injection.
【００５８】図８は、上記液晶セル６の液晶分子配向方
向９、１０と、２枚のポリカーボネート一軸延伸位相差
板の遅相軸方向１４、１５と、一対の偏光板の透過軸
８、１１とを示す平面図である。表面側透明基板の液晶
分子配向方向９、裏面側透明基板の液晶分子配向方向１
０と基準線７との角度をθ１＝２１５゜、θ２＝１４５
゜とし、裏面側から表面側に向かって液晶分子４を、ほ
ぼ２５０゜のツイスト角でツイスト配向させた。表面側
偏光板１に隣接する側の一軸延伸位相差板の遅相軸方向
１４と基準線７との角度をψ１＝１４９゜、△ｎF１・
ｄF１＝１．０００μｍとし、液晶セル６に隣接する側
の一軸延伸位相差板の遅相軸方向１５と基準線７との角
度をψ２＝１３１．５゜、△ｎF２・ｄF２＝０．６５０
μｍとした。表面側偏光板の透過軸８、裏面側偏光板の
透過軸１１と基準線７との角度をξ１＝１１０゜、ξ２
＝１００゜とした。FIG. 8 shows the liquid crystal molecule alignment directions 9 and 10 of the liquid crystal cell 6, the slow axis directions 14 and 15 of the two polycarbonate uniaxially stretched retardation plates, and the transmission axes 8 and 11 of the pair of polarizing plates. FIG. Liquid crystal molecule orientation direction 9 of front transparent substrate, liquid crystal molecule orientation direction 1 of rear transparent substrate
The angle between 0 and the reference line 7 is θ1 = 215 °, θ2 = 145
The liquid crystal molecules 4 were twist-oriented at a twist angle of about 250 ° from the back side to the front side. The angle between the slow axis direction 14 of the uniaxially stretched phase difference plate on the side adjacent to the front-side polarizing plate 1 and the reference line 7 is {1 = 149}, {n F 1.
d F 1 = 1.000 μm, the angle between the slow axis direction 15 of the uniaxially stretched retardation plate adjacent to the liquid crystal cell 6 and the reference line 7 is {2 = 131.5}, and Δn F 2 · d F 2 = 0.650
μm. The angles between the transmission axis 8 of the front-side polarizing plate, the transmission axis 11 of the rear-side polarizing plate, and the reference line 7 are {1 = 110}, Δ2
= 100 °.
【００５９】表面側偏光板１には、偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、
（ａ，ｂ）≒（−０．５，−１．０）とするＮＰＦ−Ｆ
１２２５ＤＵ（日東電工（株）製）を用いた。The front side polarizing plate 1 is provided with the hue (Hunter's Lab color system, NBS unit) of the polarizing plate alone.
NPF-F where (a, b) ≒ (−0.5, −1.0)
1225DU (manufactured by Nitto Denko Corporation) was used.
【００６０】上記カラー液晶表示パネルは、位相差板の
複屈折によって透過光を着色するとともに、この位相差
板の複屈折と、液晶分子をツイスト配向させている液晶
の複屈折とによって透過光を他の色に着色するものであ
る。In the color liquid crystal display panel, the transmitted light is colored by the birefringence of the retardation plate, and the transmitted light is colored by the birefringence of the retardation plate and the birefringence of the liquid crystal in which the liquid crystal molecules are twisted. It is colored in another color.
【００６１】液晶セルの電極間に電圧を印加していない
状態では、一方の偏光板を通って入射した光が、ツイス
ト配向させた液晶分子の複屈折と位相差板の複屈折とに
より、他方の偏光板を透過すると、無着色光になる。When no voltage is applied between the electrodes of the liquid crystal cell, the light incident through one of the polarizers is caused by the birefringence of the twist-aligned liquid crystal molecules and the birefringence of the retardation plate. When the light is transmitted through the polarizing plate, the light becomes uncolored light.
【００６２】液晶セルの電極間に電圧を印加すると、液
晶分子の配向状態の変化に対応して液晶セルでの複屈折
が変化するため、位相差板と液晶セルとの両方の複屈折
による着色光の色が変化する。When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence in the liquid crystal cell changes in response to the change in the alignment state of the liquid crystal molecules. Therefore, coloring due to the birefringence of both the retardation plate and the liquid crystal cell. The color of the light changes.
【００６３】さらに、電圧を印加して液晶分子が基板面
に対してほぼ垂直に立ち上がると、液晶セルによる複屈
折がほとんどなくなって、他方の偏光板を透過した光
が、位相差板の複屈折のみによる着色光になる。Further, when a voltage is applied to cause the liquid crystal molecules to rise almost perpendicularly to the substrate surface, birefringence by the liquid crystal cell is almost eliminated, and the light transmitted through the other polarizing plate is reduced by the birefringence of the retardation plate. It becomes colored light only by.
【００６４】また、液晶層の△ｎLC・ｄLCを１．８μ
ｍ、２５０゜ツイスト配向させ、位相差板の屈折率異方
性△ｎFと板厚ｄFとの積△ｎF・ｄFの総和が１．６５０
μｍで、２枚の位相差板の遅相軸のずれが１７．５゜と
した場合、オフ電圧印加状態で、一方の偏光板に入射す
る光が他方の偏光板出射後とほぼ等しい直線偏光となる
ので白色により近い色を表示できる。Further, Δn LC · d LC of the liquid crystal layer is 1.8 μm.
m, 250} twist oriented, and the sum of the product Δn F · d F of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F is 1.650.
In the case where the shift of the slow axes of the two retardation plates is 17.5 ° in μm, the linearly polarized light in which the light incident on one of the polarizers is almost equal to the light emitted from the other polarizer in the off-voltage applied state Therefore, a color closer to white can be displayed.
【００６５】上記構成のカラー液晶表示パネルにバック
ライトを設置し、（１／２００）〜（１／２４０）デユ
ーティー、（１／１４）〜（１／１７）バイアスで電圧
駆動させ、各階調はフレームレートコントロール法によ
り制御した。A backlight is installed on the color liquid crystal display panel having the above-described structure, and is driven by a voltage of (1/200) to (1/240) duty and (1/14) to (1/17) bias. It was controlled by the frame rate control method.
【００６６】電圧を印加した際の着色光の色変化を示す
ＣＩＥ色度図を図９に示す。従来のカラー液晶表示パネ
ル（特開平６−３０８４８１）におけるＣＩＥ色度座標
（ｘ、ｙ）は、白色（０．３６、０．２９）、赤色
（０．４６，０．３９）、青色（０．２５、０．２
２）、緑色（０．２７、０．４７）であるが、図９よ
り、本実施の形態のパネル構成とすることによって、オ
フ電圧印加時のＣＩＥ色度座標（ｘ、ｙ）が（０．３
２、０．３４）であり、従来パネルよりＤ６５白色光源
（０．３１２７、０．３２９１）に近く、赤色（０．４
７、０．２９）、青色（０．２１、０．２０）、緑色
（０．３２、０．４９）と色純度のよいカラー液晶表示
パネルを提供できる。FIG. 9 is a CIE chromaticity diagram showing a color change of colored light when a voltage is applied. The CIE chromaticity coordinates (x, y) of a conventional color liquid crystal display panel (JP-A-6-308481) are white (0.36, 0.29), red (0.46, 0.39), blue (0, 0). .25, 0.2
2) and green (0.27, 0.47), and FIG. 9 shows that the CIE chromaticity coordinates (x, y) when the off-voltage is applied are (0, 0) by adopting the panel configuration of the present embodiment. .3
2, 0.34), which is closer to the D65 white light source (0.3127, 0.3291) and red (0.4
7, 0.29), blue (0.21, 0.20), and green (0.32, 0.49).
【００６７】なお、本実施の形態では、液晶セル６とし
て液晶分子４のツイスト角をほぼ２５０゜とし、液晶層
の△ｎLC・ｄLCを１．８０μｍとし、２枚の位相差板１
２、１３の△ｎF・ｄFは１．０００μｍ、０．６５０μ
ｍとしたが、この液晶セル６は、液晶分子４を２００゜
〜２７０゜のツイスト角でツイスト配向させてもよく、
液晶層の△ｎLC・ｄLCは１．２μｍ〜２．２μｍであれ
ばよく、位相差板の屈折率異方性△ｎFと板厚ｄFとの積
△ｎF・ｄFの総和が△ｎLC・ｄLC−（０．１０μｍ〜
０．２０μｍ）の範囲であればよい。In this embodiment, the liquid crystal cell 6 has a twist angle of the liquid crystal molecules 4 of about 250 °, a liquid crystal layer having a Δn LC · d LC of 1.80 μm, and two liquid crystal plates 1.
Δn F · d F of 2.13 is 1.000 μm, 0.650 μ
m, the liquid crystal cell 6 may have the liquid crystal molecules 4 twist-oriented at a twist angle of 200 ° to 270 °,
The Δn LC · d LC of the liquid crystal layer may be 1.2 μm to 2.2 μm, and the sum of the product Δn F · d F of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F. Is Δn LC · d LC − (0.10 μm ~
0.20 μm).
【００６８】また、本実施の形態では、表面側偏光板１
に単体の色相が（ａ，ｂ）≒（−０．５，−１．０）と
なる偏光板を用いたが、オフ電圧印加時により視感度の
強い黄色を抑制し、かつ色づきの少ない白い表示を得る
ためには、表面側偏光板の偏光板単体の色相（Ｈｕｎｔ
ｅｒのＬａｂ表色系、ＮＢＳ単位）を、ａが−２．０〜
＋２．０、ｂが−８．０〜０．０の範囲とする表面側偏
光板を用いることが望ましい。In this embodiment, the front-side polarizing plate 1
Used a polarizing plate whose hue is (a, b) ≒ (−0.5, −1.0), but suppresses yellow with strong luminosity due to the application of off-voltage, and has little coloration. To obtain the display, the hue (Hunt) of the polarizing plate alone of the front-side polarizing plate is required.
er Lab color system, NBS unit), a is -2.0 to
It is desirable to use a front-side polarizing plate having +2.0 and b in the range of -8.0 to 0.0.
【００６９】また、本実施の形態では、表面側偏光板と
位相差板の配置において、表面側偏光板に隣接する位相
差板の遅相軸に対する液晶セルに隣接する位相差板の遅
相軸のずれ角を１７．５゜としたが、このずれ角は３０
゜以内とすることが望ましい。Further, in the present embodiment, in the arrangement of the front-side polarizing plate and the retardation plate, the slow axis of the retardation plate adjacent to the liquid crystal cell with respect to the slow axis of the retardation plate adjacent to the front-side polarizing plate. Was set to 17.5 °, but this deviation angle was 30 °.
It is desirable to be within ゜.
【００７０】また、液晶セルの位相差板隣接基板側にお
ける液晶分子配向方向に対する液晶セルの隣接位相差板
の遅相軸のずれ角を８３．５゜としたが、このずれ角は
９０゜±１０゜とすることが望ましい。The shift angle of the slow axis of the adjacent retardation plate of the liquid crystal cell with respect to the liquid crystal molecule alignment direction on the side of the substrate adjacent to the retardation plate of the liquid crystal cell was 83.5 °. It is desirable to be 10 °.
【００７１】さらに、表面側偏光板の隣接位相差板の遅
相軸に対する表面側偏光板の透過軸のずれ角を３９゜と
したが、このずれ角はを、４５゜±１０゜とすることが
望ましい。Further, the shift angle of the transmission axis of the front-side polarizing plate with respect to the slow axis of the phase difference plate adjacent to the front-side polarizing plate was 39 °, and the shift angle was 45 ° ± 10 °. Is desirable.
【００７２】また、本実施の形態では、裏面側偏光板の
透過軸１１と、裏面側の偏光板隣接基板の液晶分子配向
方向１０とのずれ角を４５゜としたが、このずれ角は４
５゜±１０゜とするのが望ましい。In the present embodiment, the shift angle between the transmission axis 11 of the rear-side polarizing plate and the liquid crystal molecule orientation direction 10 of the substrate adjacent to the rear-side polarizing plate is set to 45 °.
It is desirable to be 5 ± 10 °.
【００７３】また、本実施の形態では、カラー液晶表示
パネルにバックライトを設置した透過型としたが、裏面
側偏光板の外側に反射板を貼ることにより反射型のカラ
ー液晶表示パネルとしてもよい。反射型のカラー液晶表
示パネルとした場合、裏面側偏光板の透過軸１１と、反
射板１６に隣接した偏光板隣接基板の液晶分子配向方向
１０とのずれ角を４５゜±１０゜とするのが望ましい。Further, in this embodiment, the transmission type is a color liquid crystal display panel having a backlight, but a reflection type color liquid crystal display panel may be provided by attaching a reflection plate outside the back side polarizing plate. . In the case of a reflective type color liquid crystal display panel, the deviation angle between the transmission axis 11 of the rear-side polarizing plate and the liquid crystal molecule orientation direction 10 of the polarizing plate adjacent substrate adjacent to the reflecting plate 16 is set to 45 ° ± 10 °. Is desirable.
【００７４】また、より視野角の広いカラー液晶表示パ
ネルとするために、２枚の一軸延伸位相差板１２、１３
に、パネルを正面から見た場合の複屈折とパネルを角度
をつけて見た場合の複屈折の差が小さくすることができ
る三次元屈折率制御品を用いることが望ましい。In order to obtain a color liquid crystal display panel having a wider viewing angle, two uniaxially stretched retardation plates 12 and 13 are provided.
In addition, it is desirable to use a three-dimensional refractive index control product that can reduce the difference between the birefringence when the panel is viewed from the front and the birefringence when the panel is viewed at an angle.
【００７５】（参考例２） 以下、参考例２を図４、図５、図１０を参照して説明す
る。Reference Example 2 Hereinafter, Reference Example 2 will be described with reference to FIG. 4, FIG. 5, and FIG.
【００７６】図４に参考例２のカラー液晶表示パネルの
断面図を示す。このカラー液晶表示パネルは、液晶分子
４をツイスト配向させた１つの液晶セル６と、液晶セル
６を挟んで配置された一対の偏光板１、５と、液晶セル
６と表面側の偏光板１との間に配置された１枚の位相差
板１２とからなる。FIG. 4 is a sectional view of a color liquid crystal display panel of Reference Example 2. This color liquid crystal display panel includes one liquid crystal cell 6 in which liquid crystal molecules 4 are twist-aligned, a pair of polarizing plates 1 and 5 arranged with the liquid crystal cell 6 interposed therebetween, and a liquid crystal cell 6 and a polarizing plate 1 on the front side. And one retardation plate 12 disposed between the two.
【００７７】上記液晶セル６は、単純マトリクス型であ
り、表面側透明基板２上の電極３は互いに平行に形成さ
れた複数本の走査電極、裏面側透明基板２上の電極３は
前記走査電極と直交する方向に形成された複数本の信号
電極の上に配向膜を塗布し、両基板間に粒径９．５μｍ
のスペーサーを散布し、周辺部にシール剤を印刷後貼り
合わせた。カイラルピッチ１５．８μｍのトラン系ネマ
ティック液晶（△ｎLC＝０．２）を真空注入後、封止し
た。The liquid crystal cell 6 is of a simple matrix type. The electrodes 3 on the front transparent substrate 2 are a plurality of scanning electrodes formed in parallel with each other, and the electrodes 3 on the rear transparent substrate 2 are scanning electrodes. An orientation film is applied on a plurality of signal electrodes formed in a direction perpendicular to the direction of the substrate, and a particle size between the two substrates is 9.5 μm.
Was sprayed, and a sealant was printed on the periphery and then bonded. A trans-nematic liquid crystal (Δn LC = 0.2) having a chiral pitch of 15.8 μm was sealed after vacuum injection.
【００７８】図５は、上記液晶セル６の液晶分子配向方
向９、１０と、１枚のポリカーボネート一軸延伸位相差
板の遅相軸方向１４と、一対の偏光板の透過軸８、１１
とを示す平面図である。表面側透明基板の液晶分子配向
方向９、裏面側透明基板の液晶分子配向方向１０と基準
線７との角度をθ１＝２１５゜、θ２＝１４５゜とし、
裏面側から表面側に向かって液晶分子４をほぼ２５０゜
のツイスト角でツイスト配向させた。一軸延伸位相差板
の遅相軸方向１４と基準線７との角度をψ１＝１２２．
５゜、△ｎF１・ｄF１＝１．９６６μｍとした。表面側
偏光板の透過軸８、裏面側偏光板の透過軸１１と基準線
７との角度をξ１＝１６９゜、ξ２＝１００゜とした。FIG. 5 shows the liquid crystal molecule alignment directions 9 and 10 of the liquid crystal cell 6, the slow axis direction 14 of one polycarbonate uniaxially stretched retardation plate, and the transmission axes 8 and 11 of a pair of polarizing plates.
FIG. The angle between the liquid crystal molecule orientation direction 9 of the front side transparent substrate, the liquid crystal molecule orientation direction 10 of the back side transparent substrate and the reference line 7 is θ1 = 215 °, θ2 = 145 °,
The liquid crystal molecules 4 were twisted at a twist angle of about 250 ° from the back side to the front side. The angle between the slow axis direction 14 of the uniaxially stretched retardation plate and the reference line 7 is {1 = 122.
5}, Δn F 1 · d F 1 = 1.966 μm. The angles between the transmission axis 8 of the front-side polarizing plate, the transmission axis 11 of the back-side polarizing plate, and the reference line 7 were {1 = 169} and {2 = 100}.
【００７９】表面側偏光板１には、偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、
（ａ，ｂ）≒（−０．７，−０．７）とするＬＮ−１８
０５Ｔ（（株）ポラテクノ製）を用いた。The hue (Hunter's Lab color system, NBS unit) of the polarizing plate alone is applied to the front-side polarizing plate 1.
LN-18 where (a, b) ≒ (−0.7, −0.7)
05T (produced by Poratechno) was used.
【００８０】上記カラー液晶表示パネルは、位相差板の
複屈折によって透過光を着色するとともに、この位相差
板の複屈折と、液晶分子をツイスト配向させている液晶
の複屈折とによって透過光を他の色に着色するものであ
る。In the color liquid crystal display panel, the transmitted light is colored by the birefringence of the retardation plate, and the transmitted light is transmitted by the birefringence of the retardation plate and the birefringence of the liquid crystal in which the liquid crystal molecules are twisted. It is colored in another color.
【００８１】液晶セルの電極間に電圧を印加していない
状態では、一方の偏光板を通って入射した光が、ツイス
ト配向させた液晶分子の複屈折と位相差板の複屈折とに
より、他方の偏光板を透過すると、無着色光になる。In the state where no voltage is applied between the electrodes of the liquid crystal cell, the light incident through one of the polarizing plates is changed by the birefringence of the twist-aligned liquid crystal molecules and the birefringence of the retardation plate. When the light is transmitted through the polarizing plate, the light becomes uncolored light.
【００８２】液晶セルの電極間に電圧を印加すると、液
晶分子の配向状態の変化に対応して液晶セルでの複屈折
が変化するため、位相差板と液晶セルとの両方の複屈折
による着色光の色が変化する。When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence in the liquid crystal cell changes in response to the change in the alignment state of the liquid crystal molecules. Therefore, coloring due to the birefringence of both the retardation plate and the liquid crystal cell. The color of the light changes.
【００８３】さらに、電圧を印加して液晶分子が基板面
に対してほぼ垂直に立ち上がると、液晶セルによる複屈
折がほとんどなくなって、他方の偏光板を透過した光
が、位相差板の複屈折のみによる着色光になる。Further, when a voltage is applied to cause the liquid crystal molecules to rise almost perpendicularly to the substrate surface, birefringence by the liquid crystal cell is almost eliminated, and the light transmitted through the other polarizing plate is reduced by the birefringence of the retardation plate. It becomes colored light only by.
【００８４】また、液晶層の△ｎLC・ｄLCを１．９μ
ｍ、２５０゜ツイスト配向させ、位相差板の屈折率異方
性△ｎFと板厚ｄFとの積△ｎF・ｄFが１．９６６μｍと
した場合、オフ電圧印加状態で、一方の偏光板に入射す
る光が、他方の偏光板出射後とほぼ等しい直線偏光とな
るので白色により近い色を表示できる。The Δn LC · d LC of the liquid crystal layer was 1.9 μm.
m, 250 ° is twisted, if the product △ n F · d F of the refractive index anisotropy △ n F and the plate thickness d F of the phase difference plate was 1.966Myuemu, the off voltage applied state, the one Since light incident on the polarizing plate becomes linearly polarized light substantially equal to that after exiting the other polarizing plate, a color closer to white can be displayed.
【００８５】上記構成のカラー液晶表示パネルにバック
ライトを設置し、（１／２００）〜（１／２４０）デユ
ーティー、（１／１４）〜（１／１７）バイアスで電圧
駆動させ、各階調はフレームレートコントロール法によ
り制御した。A backlight is installed on the color liquid crystal display panel having the above configuration, and is driven by a voltage of (1/200) to (1/240) duty and (1/14) to (1/17) bias. It was controlled by the frame rate control method.
【００８６】電圧を印加した際の着色光の色変化を示す
ＣＩＥ色度図を図１０に示す。従来のカラー液晶表示パ
ネル（特開平６−３０８４８１）におけるＣＩＥ色度座
標（ｘ、ｙ）は、白色（０．３６、０．２９）、赤色
（０．４６，０．３９）、青色（０．２５、０．２
２）、緑色（０．２７、０．４７）であるが、図１０よ
り、本実施の形態のパネル構成とすることによって、オ
フ電圧印加時のＣＩＥ色度座標（ｘ、ｙ）が（０．３
４、０．３２）であり、従来パネルよりＤ６５白色光源
（０．３１２７、０．３２９１）に近く、赤色（０．４
７、０．２８）、青色（０．１９、０．１９）、緑色
（０．２５、０．５０）と色純度のよいカラー液晶表示
パネルを提供できる。FIG. 10 is a CIE chromaticity diagram showing a color change of colored light when a voltage is applied. The CIE chromaticity coordinates (x, y) of a conventional color liquid crystal display panel (JP-A-6-308481) are white (0.36, 0.29), red (0.46, 0.39), blue (0, 0). .25, 0.2
2) and green (0.27, 0.47), and FIG. 10 shows that the CIE chromaticity coordinates (x, y) when the off voltage is applied are (0, 0) by adopting the panel configuration of this embodiment. .3
4, 0.32), which is closer to the D65 white light source (0.3127, 0.3291) and red (0.4
7, 0.28), blue (0.19, 0.19), and green (0.25, 0.50).
【００８７】なお、参考例２では液晶セル６として液晶
分子４のツイスト角をほぼ２５０゜とし、液晶層の△ｎ
LC・ｄLCを１．９０μｍとし、１枚の位相差板１２の△
ｎF・ｄFは１．９６６μｍとしたが、この液晶セル６
は、液晶分子４を２００゜〜２７０゜のツイスト角でツ
イスト配向させてもよく、液晶層の△ｎLC・ｄLCは１．
２μｍ〜２．２μｍであればよく、位相差板の屈折率異
方性△ｎFと板厚ｄFとの積△ｎF・ｄFが、△ｎLC・ｄLC
＋（０．０５μｍ〜０．１５μｍ）の範囲であればよ
い。In the reference example 2, the twist angle of the liquid crystal molecules 4 of the liquid crystal cell 6 was set to approximately 250 °, and
LC · d LC is set to 1.90 μm.
Although n F · d F was 1.966 μm, this liquid crystal cell 6
May twist the liquid crystal molecules 4 at a twist angle of 200 ° to 270 °, and {n LC · d LC of the liquid crystal layer is 1.
May be a 2Myuemu～2.2Myuemu, product △ n F · d F of the refractive index anisotropy △ n F and the plate thickness d F of the phase difference plate, △ n LC · d LC
+ (0.05 μm to 0.15 μm).
【００８８】また、参考例２では、表面側偏光板１に単
体の色相が（ａ，ｂ）≒（−０．７，−０．７）となる
偏光板を用いたが、オフ電圧印加時により視感度の強い
黄色を抑制し、かつ色づきの少ない白い表示を得るため
には、表面側偏光板の偏光板単体の色相（Ｈｕｎｔｅｒ
のＬａｂ表色系、ＮＢＳ単位）を、ａが−２．０〜＋
２．０、ｂが−８．０〜０．０の範囲とする表面側偏光
板を用いることが望ましい。In Reference Example 2, a single polarizing plate having a hue of (a, b) ≒ (−0.7, −0.7) was used as the front-side polarizing plate 1, but the off-voltage was not applied. In order to suppress yellow with strong luminosity and obtain a white display with little coloring, the hue (Hunter) of the polarizing plate alone of the front-side polarizing plate is required.
Lab color system, NBS unit), a is -2.0 to +
It is desirable to use a front-side polarizing plate in which 2.0 and b are in the range of -8.0 to 0.0.
【００８９】また、参考例２では、一軸延伸位相差板１
２にポリカーボネートを用いたが、ポリビニルアルコー
ルやポリアリレート、ポリエーテルサルホン等を用いて
もよい。In Reference Example 2, the uniaxially stretched retardation plate 1 was used.
Although polycarbonate was used for 2, a polyvinyl alcohol, polyarylate, polyether sulfone, or the like may be used.
【００９０】また、参考例２では、表面側偏光板と位相
差板の配置において、液晶セルの位相差板隣接基板側に
おける液晶分子配向方向に対する液晶セルの隣接位相差
板の遅相軸のずれ角を９２．５゜としたが、このずれ角
は９０゜±１０゜とすることが望ましい。In Reference Example 2, in the arrangement of the front-side polarizing plate and the retardation plate, the shift of the slow axis of the adjacent retardation plate of the liquid crystal cell with respect to the liquid crystal molecule alignment direction on the side of the substrate adjacent to the retardation plate of the liquid crystal cell. Although the angle is 92.5 °, it is desirable that the deviation angle be 90 ° ± 10 °.
【００９１】さらに、表面側偏光板の隣接位相差板の遅
相軸に対する表面側偏光板の透過軸のずれ角を４６．５
゜としたが、このずれ角はを、４５゜±１０゜とするこ
とが望ましい。Further, the shift angle of the transmission axis of the front-side polarizing plate with respect to the slow axis of the phase difference plate adjacent to the front-side polarizing plate is 46.5.
However, it is desirable that the deviation angle be 45 ° ± 10 °.
【００９２】また、参考例２では、裏面側偏光板の透過
軸１１と、裏面側の偏光板隣接基板の液晶分子配向方向
１０とのずれ角を４５゜としたが、このずれ角は４５゜
±１０゜とするのが望ましい。In Reference Example 2, the angle of deviation between the transmission axis 11 of the rear-side polarizing plate and the liquid crystal molecule orientation direction 10 of the substrate adjacent to the rear-side polarizing plate was 45 °, but the deviation angle was 45 °. It is desirable to be ± 10 °.
【００９３】また、参考例２では、カラー液晶表示パネ
ルにバックライトを設置した透過型としたが、裏面側偏
光板の外側に反射板を貼ることにより反射型のカラー液
晶表示パネルとしてもよい。反射型のカラー液晶表示パ
ネルとした場合、裏面側偏光板の透過軸１１と、反射板
１６に隣接した偏光板隣接基板の液晶分子配向方向１０
とのずれ角を４５゜±１０゜とするのが望ましい。In the second embodiment, the color liquid crystal display panel is of a transmission type in which a backlight is provided. However, a reflection type color liquid crystal display panel may be provided by attaching a reflection plate to the outside of the back side polarizing plate. In the case of a reflection type color liquid crystal display panel, the transmission axis 11 of the back side polarizing plate and the liquid crystal molecule orientation direction 10 of the polarizing plate adjacent substrate adjacent to the reflecting plate 16 are used.
Is preferably set to 45 ° ± 10 °.
【００９４】また、より視野角の広いカラー液晶表示パ
ネルとするために、一軸延伸位相差板１２に、パネルを
正面から見た場合の複屈折と、パネルを角度をつけて見
た場合の複屈折の差が小さくすることができる三次元屈
折率制御品を用いることが望ましい。Further, in order to obtain a color liquid crystal display panel having a wider viewing angle, the birefringence when the panel is viewed from the front and the birefringence when the panel is viewed at an angle are provided on the uniaxially stretched retardation plate 12. It is desirable to use a three-dimensional refractive index controlled product that can reduce the difference in refraction.
【００９５】（参考例３） 以下、参考例３を図７、図８、図１１を参照して説明す
る。Reference Example 3 Hereinafter, Reference Example 3 will be described with reference to FIGS. 7, 8, and 11.
【００９６】図７に参考例３のカラー液晶表示パネルの
断面図を示す。このカラー液晶表示パネルは、液晶分子
４をツイスト配向させた１つの液晶セル６と、液晶セル
６を挟んで配置された一対の偏光板１、５と、液晶セル
６と表面側の偏光板１との間に配置された２枚の位相差
板１２、１３とからなる。FIG. 7 is a sectional view of a color liquid crystal display panel of Reference Example 3. This color liquid crystal display panel includes one liquid crystal cell 6 in which liquid crystal molecules 4 are twist-aligned, a pair of polarizing plates 1 and 5 arranged with the liquid crystal cell 6 interposed therebetween, and a liquid crystal cell 6 and a polarizing plate 1 on the front side. And two retardation plates 12 and 13 disposed between the two.
【００９７】上記液晶セル６は、単純マトリクス型であ
り、表面側透明基板２上の電極３は互いに平行に形成さ
れた複数本の走査電極、裏面側透明基板２上の電極３は
前記走査電極と直交する方向に形成された複数本の信号
電極の上に配向膜を塗布し、両基板間に粒径８．０μｍ
のスペーサーを散布し、周辺部にシール剤を印刷後貼り
合わせた。カイラルピッチ１３．３μｍのトラン系ネマ
ティック液晶（△ｎLC＝０．２）を真空注入後、封止し
た。The liquid crystal cell 6 is of a simple matrix type. The electrodes 3 on the front transparent substrate 2 are a plurality of scanning electrodes formed in parallel with each other, and the electrodes 3 on the rear transparent substrate 2 are scanning electrodes. An orientation film is applied on a plurality of signal electrodes formed in a direction perpendicular to the direction of the substrate, and a particle diameter of 8.0 μm
Was sprayed, and a sealant was printed on the periphery and then bonded. A trans nematic liquid crystal (Δn LC = 0.2) having a chiral pitch of 13.3 μm was sealed after vacuum injection.
【００９８】図８は、上記液晶セル６の液晶分子配向方
向９、１０と、２枚のポリカーボネート一軸延伸位相差
板の遅相軸方向１４、１５と一対の偏光板の透過軸８、
１１とを示す平面図である。表面側透明基板の液晶分子
配向方向９、裏面側透明基板の液晶分子配向方向１０と
基準線７との角度をθ１＝２１５゜、θ２＝１４５゜と
し、裏面側から表面側に向かって液晶分子４をほぼ２５
０゜のツイスト角でツイスト配向させた。表面側偏光板
１に隣接する側の一軸延伸位相差板の遅相軸方向１４と
基準線７との角度をψ１＝１３６゜、△ｎF１・ｄF１＝
１．２９４μｍとし、液晶セル６に隣接する側の一軸延
伸位相差板の遅相軸方向１５と基準線７との角度をψ２
＝１２４．５゜、△ｎF２・ｄF２＝０．３９２μｍとし
た。表面側偏光板の透過軸８、裏面側偏光板の透過軸１
１と基準線７との角度をξ１＝３゜、ξ２＝１００゜と
した。FIG. 8 shows the liquid crystal molecule alignment directions 9 and 10 of the liquid crystal cell 6, the slow axis directions 14 and 15 of the two polycarbonate uniaxially stretched retardation plates, and the transmission axes 8 of a pair of polarizing plates.
11 is a plan view of FIG. The angle between the liquid crystal molecule alignment direction 9 of the front side transparent substrate, the liquid crystal molecule alignment direction 10 of the back side transparent substrate and the reference line 7 is θ1 = 215 °, θ2 = 145 °, and the liquid crystal molecules are oriented from the back side to the front side. 4 to almost 25
Twist orientation was performed at a twist angle of 0 °. The angle between the slow axis direction 14 of the uniaxially stretched phase difference plate adjacent to the front side polarizing plate 1 and the reference line 7 is {1 = 136}, Δn F 1 · d F 1 =
1.294 μm, and the angle between the slow axis direction 15 of the uniaxially stretched phase difference plate adjacent to the liquid crystal cell 6 and the reference line 7 is set to
= 124.5 °, it was △ n F 2 · d F 2 = 0.392μm. Transmission axis 8 of front side polarizing plate, transmission axis 1 of back side polarizing plate
The angle between 1 and the reference line 7 was {1 = 3} and {2 = 100}.
【００９９】表面側偏光板１には、偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、
（ａ，ｂ）≒（−０．５，−１．０）とするＮＰＦ−Ｆ
１２２５ＤＵ（日東電工（株）製）を用いた。The front side polarizing plate 1 is provided with the hue (Hunter's Lab color system, NBS unit) of the polarizing plate alone.
NPF-F where (a, b) ≒ (−0.5, −1.0)
1225DU (manufactured by Nitto Denko Corporation) was used.
【０１００】上記カラー液晶表示パネルは、位相差板の
複屈折によって透過光を着色するとともに、この位相差
板の複屈折と、液晶分子をツイスト配向させている液晶
の複屈折とによって透過光を他の色に着色するものであ
る。In the color liquid crystal display panel, the transmitted light is colored by the birefringence of the phase difference plate, and the transmitted light is colored by the birefringence of the phase difference plate and the birefringence of the liquid crystal in which the liquid crystal molecules are twisted. It is colored in another color.
【０１０１】液晶セルの電極間に電圧を印加していない
状態では、一方の偏光板を通って入射した光が、ツイス
ト配向させた液晶分子の複屈折と位相差板の複屈折とに
より、他方の偏光板を透過すると、無着色光になる。When no voltage is applied between the electrodes of the liquid crystal cell, the light incident through one of the polarizing plates is changed by the birefringence of the twist-aligned liquid crystal molecules and the birefringence of the retardation plate. When the light is transmitted through the polarizing plate, the light becomes uncolored light.
【０１０２】液晶セルの電極間に電圧を印加すると、液
晶分子の配向状態の変化に対応して液晶セルでの複屈折
が変化するため、位相差板と液晶セルとの両方の複屈折
による着色光の色が変化する。When a voltage is applied between the electrodes of the liquid crystal cell, the birefringence in the liquid crystal cell changes in response to the change in the alignment state of the liquid crystal molecules. Therefore, coloring due to the birefringence of both the retardation plate and the liquid crystal cell. The color of the light changes.
【０１０３】さらに、電圧を印加して液晶分子が基板面
に対してほぼ垂直に立ち上がると、液晶セルによる複屈
折がほとんどなくなって、他方の偏光板を透過した光
が、位相差板の複屈折のみによる着色光になる。Further, when a voltage is applied to cause the liquid crystal molecules to rise almost perpendicularly to the substrate surface, birefringence by the liquid crystal cell is almost eliminated, and the light transmitted through the other polarizing plate is reduced by the birefringence of the retardation plate. It becomes colored light only by.
【０１０４】また、液晶層の△ｎLC・ｄLCを１．６μ
ｍ、２５０゜ツイスト配向させ、位相差板の屈折率異方
性△ｎFと板厚ｄFとの積△ｎF・ｄFの総和が１．６８６
μｍで、２枚の位相差板の遅相軸のずれが１１．５゜と
した場合、オフ電圧印加状態で、一方の偏光板に入射す
る光が他方の偏光板出射後とほぼ等しい直線偏光となる
ので白色により近い色を表示できる。The Δn LC · d LC of the liquid crystal layer was set to 1.6 μm.
m, 250} twist-oriented, and the sum of the product Δn F · d F of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F is 1.686.
In the case where the deviation of the slow axes of the two phase difference plates is 11.5 ° in μm, the linearly polarized light in which the light incident on one of the polarizers is almost equal to the light emitted from the other polarizer in the off-voltage applied state Therefore, a color closer to white can be displayed.
【０１０５】上記構成のカラー液晶表示パネルにバック
ライトを設置し、（１／２００）〜（１／２４０）デュ
ーティー、（１／１４）〜（１／１７）バイアスで電圧
駆動させ、各階調はフレームレートコントロール法によ
り制御した。A backlight is installed on the color liquid crystal display panel having the above-described structure, and is driven with a voltage of (1/200) to (1/240) duty and (1/14) to (1/17) bias. It was controlled by the frame rate control method.
【０１０６】電圧を印加した際の着色光の色変化を示す
ＣＩＥ色度図を図１１に示す。従来のカラー液晶表示パ
ネル（特開平６−３０８４８１）におけるＣＩＥ色度座
標（ｘ、ｙ）は、白色（０．３６、０．２９）、赤色
（０．４６，０．３９）、青色（０．２５、０．２
２）、緑色（０．２７、０．４７）であるが、図１１よ
り、本実施の形態のパネル構成とすることによって、オ
フ電圧印加時のＣＩＥ色度座標（ｘ、ｙ）が（０．３
４、０．３１）であり、従来パネルよりＤ６５白色光源
（０．３１２７、０．３２９１）に近く、赤色（０．５
６、０．２８）、青色（０．１６、０．１５）、緑色
（０．２１、０．５１）と色純度のよいカラー液晶表示
パネルを提供できる。FIG. 11 is a CIE chromaticity diagram showing a color change of colored light when a voltage is applied. The CIE chromaticity coordinates (x, y) of a conventional color liquid crystal display panel (JP-A-6-308481) are white (0.36, 0.29), red (0.46, 0.39), and blue (0, 0). .25, 0.2
2) and green (0.27, 0.47), and FIG. 11 shows that the CIE chromaticity coordinates (x, y) at the time of applying the off voltage are (0, 0) by adopting the panel configuration of this embodiment. .3
4, 0.31), which is closer to the D65 white light source (0.3127, 0.3291) and red (0.5
6, 0.28), blue (0.16, 0.15), and green (0.21, 0.51).
【０１０７】なお、参考例３では、液晶セル６として液
晶分子４のツイスト角をほぼ２５０゜とし、液晶層の△
ｎLC・ｄLCを１．６０μｍとし、２枚の位相差板１２、
１３の△ｎF・ｄFは０．３９２μｍ、１．２９４μｍと
したが、この液晶セル６は、液晶分子４を２００゜〜２
７０゜のツイスト角でツイスト配向させてもよく、液晶
層の△ｎLC・ｄLCは１．２μｍ〜２．２μｍであればよ
く、位相差板の屈折率異方性△ｎFと板厚ｄFとの積△ｎ
F・ｄFの総和が△ｎLC・ｄLC＋（０．０５μｍ〜０．１
５μｍ）の範囲であればよい。In the reference example 3, the twist angle of the liquid crystal molecules 4 of the liquid crystal cell 6 was set to approximately 250 °, and
n LC · d LC is set to 1.60 μm, and two retardation plates 12
13, the Δn F · d F was 0.392 μm and 1.294 μm.
The liquid crystal layer may be twist-oriented at a twist angle of 70 °, Δn LC · d LC of the liquid crystal layer may be 1.2 μm to 2.2 μm, and the refractive index anisotropy Δn F of the retardation plate and the plate thickness Product with d F △ n
The sum of F · d F is Δn LC · d LC + (0.05 μm to 0.1
5 μm).
【０１０８】また、参考例３では、表面側偏光板１に単
体の色相が（ａ，ｂ）≒（−０．５，−１．０）となる
偏光板を用いたが、オフ電圧印加時により視感度の強い
黄色を抑制し、かつ色づきの少ない白い表示を得るため
には、表面側偏光板の偏光板単体の色相（Ｈｕｎｔｅｒ
のＬａｂ表色系、ＮＢＳ単位）を、ａが−２．０〜＋
２．０、ｂが−８．０〜０．０の範囲とする表面側偏光
板を用いることが望ましい。Further, in Reference Example 3, a single polarizing plate having a hue of (a, b) ０．５ (−0.5, −1.0) was used for the front-side polarizing plate 1, but when the off voltage was applied. In order to suppress yellow with strong luminosity and obtain a white display with little coloring, the hue (Hunter) of the polarizing plate alone of the front-side polarizing plate is required.
Lab color system, NBS unit), a is -2.0 to +
It is desirable to use a front-side polarizing plate in which 2.0 and b are in the range of -8.0 to 0.0.
【０１０９】また、参考例３では、一軸延伸位相差板１
２、１３にポリカーボネートを用いたが、ポリビニルア
ルコールやポリアリレート、ポリエーテルサルホン等を
用いてもよい。In Reference Example 3, the uniaxially stretched retardation film 1 was used.
Although polycarbonate is used for 2 and 13, polyvinyl alcohol, polyarylate, polyether sulfone, or the like may be used.
【０１１０】また、参考例３では、表面側偏光板と位相
差板の配置において、表面側偏光板に隣接する位相差板
の遅相軸に対する液晶セルに隣接する位相差板の遅相軸
のずれ角を１１．５゜としたが、このずれ角は３０゜以
内とすることが望ましい。Further, in Reference Example 3, in the arrangement of the front-side polarizing plate and the retardation plate, the slow axis of the retardation plate adjacent to the liquid crystal cell with respect to the slow axis of the retardation plate adjacent to the front-side polarizing plate. Although the shift angle is set to 11.5 °, it is preferable that the shift angle be within 30 °.
【０１１１】また、液晶セルの位相差板隣接基板側にお
ける液晶分子配向方向に対する液晶セルの隣接位相差板
の遅相軸のずれ角を９０．５゜としたが、このずれ角は
９０゜±１０゜とすることが望ましい。Further, the shift angle of the slow axis of the adjacent retardation plate of the liquid crystal cell with respect to the liquid crystal molecule alignment direction on the side of the substrate adjacent to the retardation plate of the liquid crystal cell was 90.5 °. It is desirable to be 10 °.
【０１１２】さらに、表面側偏光板の隣接位相差板の遅
相軸に対する表面側偏光板の透過軸のずれ角を４７゜と
したが、このずれ角はを、４５゜±１０゜とすることが
望ましい。Further, the shift angle of the transmission axis of the front-side polarizing plate with respect to the slow axis of the phase difference plate adjacent to the front-side polarizing plate was set to 47 °, and this shift angle was set to 45 ° ± 10 °. Is desirable.
【０１１３】また、参考例３では、裏面側偏光板の透過
軸１１と、裏面側の偏光板隣接基板の液晶分子配向方向
１０とのずれ角を４５゜としたが、このずれ角は４５゜
±１０゜とするのが望ましい。Further, in Reference Example 3, the shift angle between the transmission axis 11 of the back-side polarizing plate and the liquid crystal molecule orientation direction 10 of the substrate adjacent to the back-side polarizing plate was 45 °, but this shift angle was 45 °. It is desirable to be ± 10 °.
【０１１４】また、参考例３では、カラー液晶表示パネ
ルにバックライトを設置した透過型としたが、裏面側偏
光板の外側に反射板を貼ることにより反射型のカラー液
晶表示パネルとしてもよい。反射型のカラー液晶表示パ
ネルとした場合、裏面側偏光板の透過軸１１と、反射板
１６に隣接した偏光板隣接基板の液晶分子配向方向１０
とのずれ角を４５゜±１０゜とするのが望ましい。Further, in the reference example 3, the backlight is provided on the color liquid crystal display panel. However, a reflection type color liquid crystal display panel may be formed by attaching a reflection plate outside the back side polarizing plate. In the case of a reflection type color liquid crystal display panel, the transmission axis 11 of the back side polarizing plate and the liquid crystal molecule orientation direction 10 of the polarizing plate adjacent substrate adjacent to the reflecting plate 16 are used.
Is preferably set to 45 ° ± 10 °.
【０１１５】また、より視野角の広いカラー液晶表示パ
ネルとするために、２枚の一軸延伸位相差板１２、１３
に、パネルを正面から見た場合の複屈折と、パネルを角
度をつけて見た場合の複屈折の差が小さくすることがで
きる三次元屈折率制御品を用いることが望ましい。In order to obtain a color liquid crystal display panel having a wider viewing angle, two uniaxially stretched retardation plates 12 and 13 are provided.
In addition, it is desirable to use a three-dimensional refractive index controlled product that can reduce the difference between the birefringence when the panel is viewed from the front and the birefringence when the panel is viewed at an angle.
【０１１６】[0116]
【発明の効果】本発明のカラー液晶表示装置は、従来の
カラー液晶表示装置のようにカラーフィルターを用いず
に、液晶層のみの複屈折、あるいは一軸延伸位相差板と
液晶層の複屈折と、偏光板とによって光を着色するもの
であり、高い透過率が得られ、コストも低下する。The color liquid crystal display device of the present invention does not use a color filter as in the conventional color liquid crystal display device, but uses only the birefringence of the liquid crystal layer or the birefringence of the uniaxially stretched retardation plate and the liquid crystal layer. The light is colored by the polarizing plate, a high transmittance is obtained, and the cost is reduced.
【０１１７】また、液晶セルへの印加電圧を制御するこ
とによって、着色光の色を変えることが可能なため、複
数色のカラー表示が可能である。By controlling the voltage applied to the liquid crystal cell, the color of the colored light can be changed, so that a plurality of colors can be displayed.
【０１１８】なお、第１、第２の発明のカラー液晶表示
装置において、液晶分子を２００゜〜２７０゜のツイス
ト角でツイスト配向させ、液晶層の△ｎLC・ｄLCは１．
２μｍ〜２．２μｍとし、少なくとも１枚からなるポリ
カーボネートの位相差板の屈折率異方性△ｎFと板厚ｄF
との積△ｎF・ｄFの総和が△ｎLC・ｄLC−（０．１０μ
ｍ〜０．２０μｍ）の範囲とすることにより、オフ電圧
印加時にさらに白い表示を得ることができ、色純度を上
げ、色数を増やし、コストを抑えたカラー液晶表示パネ
ルが提供できる。[0118] Incidentally, in the color liquid crystal display device of the first, second invention, the liquid crystal molecules are twisted by 200 ° to 270 ° twist angle of the liquid crystal layer △ n LC · d LC 1.
2 μm to 2.2 μm, and the refractive index anisotropy Δn F and plate thickness d F of at least one polycarbonate retardation plate
The sum of the products △ n F · d F is △ n LC · d LC − (0.10 μm
m to 0.20 μm), a whiter display can be obtained when an off-voltage is applied, and a color liquid crystal display panel with higher color purity, more colors, and lower cost can be provided.
【０１１９】なお、表面側偏光板の偏光板単体の色相
（ＨｕｎｔｅｒのＬａｂ表色系、ＮＢＳ単位）を、ａが
−２．０〜＋２．０、ｂが−８．０〜０．０の範囲とす
ることにより、より視感度の強い黄色を抑制し、かつ色
づきの少ない白い表示を得られる。 Note that the hue (Hunter's Lab color system, NBS unit) of the polarizing plate alone of the front-side polarizing plate is such that a is -2.0 to +2.0 and b is -8.0 to 0.0. with the range to suppress more luminosity intense yellow, and Ru obtained white display less coloring.
【０１２０】なお、第２の発明のカラー液晶表示パネル
に用いる、少なくとも２枚からなるポリカーボネートの
位相差板の配置において、表面側偏光板に隣接する位相
差板の遅相軸に対する液晶セルに隣接する位相差板の遅
相軸のずれ角を３０゜以内とすることにより、色純度の
高いカラー液晶表示パネルを、カラーフィルター無しで
提供できる。[0120] Note that use in a color liquid crystal display panel of the second invention, in the arrangement of the phase difference plate of polycarbonate of at least two, adjacent to the liquid crystal cell for the slow axis of the retardation plate adjacent to the surface side polarizing plate By setting the shift angle of the slow axis of the retardation plate to 30 ° or less, a color liquid crystal display panel with high color purity can be provided without a color filter.
【０１２１】なお、本発明のカラー液晶表示パネルに用
いる裏面側偏光板の外側に反射板を貼ることにより、反
射型のカラー液晶表示パネルとして提供できる。[0121] Note that by affixing the reflector to the outside of the back face side-polarizing plate to be used in color liquid crystal display panel of the present invention can be provided as a reflective type color liquid crystal display panel.
【図１】参考例１を示すカラー液晶表示装置の断面図FIG. 1 is a cross-sectional view of a color liquid crystal display device showing Reference Example 1.
【図２】参考例１を示すカラー液晶表示装置における液
晶セルの液晶分子配向方向と一対の偏光板の透過軸とを
示す平面図で、 (ａ)表面側偏光板の透過軸を示す図 (ｂ)表面側透明基板の液晶分子配向方向と、裏面側透明
基板の液晶分子配向方向とを示す図 (ｃ)裏面側偏光板の透過軸を示す図FIG. 2 is a plan view showing a liquid crystal molecule orientation direction of a liquid crystal cell and a transmission axis of a pair of polarizing plates in a color liquid crystal display device showing Reference Example 1, and FIG. b) A diagram showing the liquid crystal molecule orientation direction of the front side transparent substrate and the liquid crystal molecule orientation direction of the back side transparent substrate. (c) A diagram showing the transmission axis of the back side polarizing plate.
【図３】参考例１のカラー液晶表示装置における着色光
の色変化を示す平面図FIG. 3 is a plan view showing a color change of colored light in the color liquid crystal display device of Reference Example 1.
【図４】第１の実施の形態および参考例２を示すカラー
液晶表示装置の断面図FIG. 4 is a cross-sectional view of a color liquid crystal display device according to the first embodiment and Reference Example 2.
【図５】第１の実施の形態および参考例２を示すカラー
液晶表示装置における液晶セルの液晶分子配向方向と２
枚の一軸延伸位相差板の遅相軸と一対の偏光板の透過軸
とを示す平面図で、 （ａ）表面側偏光板の透過軸を示す図 （ｂ）位相差板１の遅相軸を示す図 （ｃ）表面側透明基板の液晶分子配向方向と、裏面側透
明基板の液晶分子配向方向とを示す図 （ｄ）裏面側偏光板の透過軸を示す図FIG. 5 shows the liquid crystal molecule alignment direction of a liquid crystal cell in the color liquid crystal display device according to the first embodiment and Reference Example 2;
FIG. 2 is a plan view showing a slow axis of one uniaxially stretched retardation plate and a transmission axis of a pair of polarizing plates; FIG. 3A is a diagram showing a transmission axis of a front-side polarizing plate; (C) A diagram showing the liquid crystal molecule alignment direction of the front side transparent substrate and the liquid crystal molecule alignment direction of the back side transparent substrate. (D) A diagram showing the transmission axis of the back side polarizing plate.
【図６】第１の実施の形態のカラー液晶表示装置におけ
る着色光の色変化を示す平面図FIG. 6 is a plan view showing a color change of colored light in the color liquid crystal display device according to the first embodiment.
【図７】第２の実施の形態および参考例２を示すカラー
液晶表示装置の断面図FIG. 7 is a cross-sectional view of a color liquid crystal display device according to a second embodiment and Reference Example 2.
【図８】第２の実施の形態および参考例３を示すカラー
液晶表示装置における液晶セルの液晶分子配向方向と２
枚の一軸延伸位相差板の遅相軸と一対の偏光板の透過軸
とを示す平面図で、 （ａ）表面側偏光板の透過軸を示す図 （ｂ）位相差板１の遅相軸を示す図 （ｃ）位相差板２の遅相軸を示す図 （ｄ）表面側透明基板の液晶分子配向方向と、裏面側透
明基板の液晶分子配向方向とを示す図 （ｅ）裏面側偏光板の透過軸を示す図FIG. 8 shows the liquid crystal molecule orientation directions of a liquid crystal cell in a color liquid crystal display device according to a second embodiment and a reference example 3;
FIG. 2 is a plan view showing a slow axis of one uniaxially stretched retardation plate and a transmission axis of a pair of polarizing plates; FIG. 3A is a diagram showing a transmission axis of a front-side polarizing plate; (C) A diagram showing the slow axis of the retardation plate 2 (d) A diagram showing the liquid crystal molecule alignment direction of the front side transparent substrate and the liquid crystal molecule alignment direction of the back side transparent substrate (e) Back side polarization Diagram showing transmission axis of plate
【図９】第２の実施の形態のカラー液晶表示装置におけ
る着色光の色変化を示す平面図FIG. 9 is a plan view showing a color change of colored light in a color liquid crystal display device according to a second embodiment.
【図１０】参考例２のカラー液晶表示装置における着色
光の色変化を示す平面図FIG. 10 is a plan view showing a color change of colored light in the color liquid crystal display device of Reference Example 2.
【図１１】参考例３のカラー液晶表示装置における着色
光の色変化を示す平面図FIG. 11 is a plan view showing a color change of colored light in the color liquid crystal display device of Reference Example 3.
１ 表面側偏光板 ２ 透明基板 ３ 透明電極 ４ 液晶分子 ５ 裏面側偏光板 ６ 液晶セル ７ 基準線 ８ 表面側偏光板の透過軸 ９ 表面側透明基板の液晶分子配向方向 １０ 裏面側透明基板の液晶分子配向方向 １１ 裏面側偏光板の透過軸 １２ 位相差板１ １３ 位相差板２ １４ 位相差板１の遅相軸 １５ 位相差板２の遅相軸 １６ 反射板 REFERENCE SIGNS LIST 1 front side polarizing plate 2 transparent substrate 3 transparent electrode 4 liquid crystal molecules 5 back side polarizing plate 6 liquid crystal cell 7 reference line 8 transmission axis of front side polarizing plate 9 orientation direction of liquid crystal molecules of front side transparent substrate 10 liquid crystal of back side transparent substrate Molecular orientation direction 11 Transmission axis of back side polarizing plate 12 Phase difference plate 1 13 Phase difference plate 2 14 Slow axis of phase difference plate 1 15 Slow axis of phase difference plate 2 16 Reflection plate
フロントページの続き (72)発明者 藤田 晋吾 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 山口 久典 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭62−265620（ＪＰ，Ａ) 特開 昭62−275220（ＪＰ，Ａ) 国際公開96／13752（ＷＯ，Ａ１)Continuing from the front page (72) Inventor Shingo Fujita 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. References JP-A-62-265620 (JP, A) JP-A-62-275220 (JP, A) WO 96/13752 (WO, A1)
Claims (4)
させるカラー液晶表示パネルにおいて、 対向面に透明電極が形成された２枚の上下電極基板間に
液晶を挟持し、前記液晶の分子を上下電極基板間で２０
０゜〜２７０゜ツイスト配向させ、前記液晶の光学異方
性△ｎLCと、前記液晶の液晶層厚ｄLC（μｍ）との積△
ｎLC・ｄLCを１．２μｍ〜１．９μｍとした液晶セル
と、前記液晶セルを挟んで配置された２枚の偏光板と、
前記液晶セルと表面側の偏光板との間に配置された１枚
のポリカーボネイトの位相差板とからなり、前記位相差
板の屈折率異方性△ｎFと板厚ｄFとの積△ｎF・ｄFが、 △ｎLC・ｄLC−（０．１０μｍ〜０．２０μｍ）である
ことを特徴とするカラー液晶表示パネル。1. A color display without using a color filter
In a color liquid crystal display panel, a liquid crystal is sandwiched between two upper and lower electrode substrates each having a transparent electrode formed on the opposite surface, and molecules of the liquid crystal are caused to flow between the upper and lower electrode substrates.
0 ° to 270 ° twist-oriented, and the optical anisotropy of the liquid crystal {product of n LC and liquid crystal layer thickness d LC (μm)} of the liquid crystal
a liquid crystal cell having n LC · d LC of 1.2 μm to 1.9 μm, and two polarizing plates disposed so as to sandwich the liquid crystal cell;
A retardation plate made of one polycarbonate disposed between the liquid crystal cell and the polarizing plate on the surface side, wherein the product of the refractive index anisotropy of the retardation plate △ n F and the plate thickness d F △ n F · d F is, △ n LC · d LC - color liquid crystal display panel, which is a (0.10μm~0.20μm).
させるカラー液晶表示パネルにおいて、 対向面に透明電極が形成された２枚の上下電極基板間に
液晶を挟持し、前記液晶の分子を上下電極基板間で２０
０゜〜２７０゜ツイスト配向させ、前記液晶の光学異方
性△ｎLCと、前記液晶の液晶層厚ｄLC（μｍ）との積△
ｎLC・ｄLCを１．２μｍ〜１．８μｍとした液晶セル
と、前記液晶セルを挟んで配置された２枚の偏光板と、
前記液晶セルと表面側の偏光板との間に配置された少な
くとも２枚のポリカーボネイトの位相差板とからなり、
前記位相差板の屈折率異方性△ｎFと板厚ｄFとの積△ｎ
F・ｄFの総和が、 △ｎLC・ｄLC−（０．１０μｍ〜０．２０μｍ）である
ことを特徴とするカラー液晶表示パネル。2. A color display without using a color filter.
In a color liquid crystal display panel, a liquid crystal is sandwiched between two upper and lower electrode substrates each having a transparent electrode formed on the opposite surface, and molecules of the liquid crystal are caused to flow between the upper and lower electrode substrates.
0 ° to 270 ° twist-oriented, and the optical anisotropy of the liquid crystal {product of n LC and liquid crystal layer thickness d LC (μm)} of the liquid crystal
a liquid crystal cell having n LC · d LC of 1.2 μm to 1.8 μm, and two polarizing plates disposed so as to sandwich the liquid crystal cell;
At least two polycarbonate retardation plates disposed between the liquid crystal cell and the front-side polarizing plate,
The product Δn of the refractive index anisotropy Δn F of the retardation plate and the plate thickness d F
Sum of F · d F is, △ n LC · d LC - color liquid crystal display panel, which is a (0.10μm~0.20μm).
させるカラー液晶表示パネルにおいて、 対向面に透明電極が形成された２枚の上下電極基板間に
液晶を挟持し、前記液晶の分子を上下電極基板間で２０
０゜〜２７０゜ツイスト配向させ、前記液晶の光学異方
性△ｎLCと、前記液晶の液晶層厚ｄLC（μｍ）との積△
ｎLC・ｄLCを１．９μｍとした液晶セルと、前記液晶セ
ルを挟んで配置された２枚の偏光板と、前記液晶セルと
表面側の偏光板との間に配置された１枚のポリカーボネ
イトの位相差板とからなり、 前記位相差板の屈折率異方性△ｎFと、前記位相差板の
板厚ｄFとの積の、 △ｎF・ｄFが、 △ｎLC・ｄLC−（０．１０μｍ〜０．２０μｍ）の関係
を有し、 前記△ｎF・ｄFが、１．７２６μｍであることを特徴と
するカラー液晶表示パネル。3. Color display without using a color filter
In a color liquid crystal display panel, a liquid crystal is sandwiched between two upper and lower electrode substrates each having a transparent electrode formed on the opposite surface, and molecules of the liquid crystal are caused to flow between the upper and lower electrode substrates.
0 ° to 270 ° twist-oriented, and the optical anisotropy of the liquid crystal {product of n LC and liquid crystal layer thickness d LC (μm)} of the liquid crystal
a liquid crystal cell having an n LC · d LC of 1.9 μm, two polarizing plates disposed so as to sandwich the liquid crystal cell, and one polarizing plate disposed between the liquid crystal cell and a front-side polarizing plate composed of a retardation plate of polycarbonate, the refractive index anisotropy △ n F of the retardation plate, the product of the thickness d F of the retardation plate, △ n F · d F is, △ n LC · d LC - has a relationship (0.10μm~0.20μm), wherein △ n F · d F is a color liquid crystal display panel, which is a 1.726Myuemu.
させるカラー液晶表示パネルにおいて、 対向面に透明電極が形成された２枚の上下電極基板間に
液晶を挟持し、前記液晶の分子を上下電極基板間で２０
０゜〜２７０゜ツイスト配向させ、前記液晶の光学異方
性△ｎLCと、前記液晶の液晶層厚ｄLC（μｍ）との積△
ｎLC・ｄLCを１．８μｍとした液晶セルと、前記液晶セ
ルを挟んで配置された２枚の偏光板と、前記液晶セルと
表面側の偏光板との間に配置された少なくとも２枚のポ
リカーボネイトの位相差板とからなり、 前記位相差板の屈折率異方性△ｎFと、前記位相差板の
板厚ｄFとの積の、 △ｎF・ｄFの総和が、 △ｎLC・ｄLC−（０．１０μｍ〜０．２０μｍ）の関係
を有し、 前記△ｎF・ｄFの総和が、１．６５０μｍであることを
特徴とするカラー液晶表示パネル。4. A color display without using a color filter.
In a color liquid crystal display panel, a liquid crystal is sandwiched between two upper and lower electrode substrates each having a transparent electrode formed on the opposite surface, and molecules of the liquid crystal are caused to flow between the upper and lower electrode substrates.
0 ° to 270 ° twist-oriented, and the optical anisotropy of the liquid crystal {product of n LC and liquid crystal layer thickness d LC (μm)} of the liquid crystal
a liquid crystal cell having an n LC · d LC of 1.8 μm, two polarizing plates disposed with the liquid crystal cell interposed therebetween, and at least two polarizing plates disposed between the liquid crystal cell and a front-side polarizing plate composed of a retardation plate of polycarbonate, the refractive index anisotropy △ n F of the retardation plate, the product of the thickness d F of the retardation plate, the sum of △ n F · d F, △ A color liquid crystal display panel having a relationship of n LC · d LC − (0.10 μm to 0.20 μm), wherein the sum of Δn F · d F is 1.650 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23879496A JP3297606B2 (en) | 1996-09-10 | 1996-09-10 | Color liquid crystal display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23879496A JP3297606B2 (en) | 1996-09-10 | 1996-09-10 | Color liquid crystal display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1090644A JPH1090644A (en) | 1998-04-10 |
| JP3297606B2 true JP3297606B2 (en) | 2002-07-02 |
Family
ID=17035389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23879496A Expired - Fee Related JP3297606B2 (en) | 1996-09-10 | 1996-09-10 | Color liquid crystal display panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3297606B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6692598B1 (en) | 1999-10-18 | 2004-02-17 | Murata Manufacturing Co. Ltd | Method of producing ceramic green sheet and method of manufacturing multilayer ceramic electronic part |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001147414A (en) * | 1999-11-22 | 2001-05-29 | Stanley Electric Co Ltd | Tn type liquid crystal display device |
-
1996
- 1996-09-10 JP JP23879496A patent/JP3297606B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6692598B1 (en) | 1999-10-18 | 2004-02-17 | Murata Manufacturing Co. Ltd | Method of producing ceramic green sheet and method of manufacturing multilayer ceramic electronic part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1090644A (en) | 1998-04-10 |
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