JP3269378B2 - Projection type liquid crystal display device and method of manufacturing projection type liquid crystal display device - Google Patents
Projection type liquid crystal display device and method of manufacturing projection type liquid crystal display deviceInfo
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- JP3269378B2 JP3269378B2 JP06601396A JP6601396A JP3269378B2 JP 3269378 B2 JP3269378 B2 JP 3269378B2 JP 06601396 A JP06601396 A JP 06601396A JP 6601396 A JP6601396 A JP 6601396A JP 3269378 B2 JP3269378 B2 JP 3269378B2
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- liquid crystal
- crystal display
- type liquid
- display device
- cell thickness
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、投射型液晶表示装
置及び投射型液晶表示装置の製造方法に関する。さらに
詳しくは、ＴＮポジ型液晶表示素子を複数枚用いた多板
式投射型液晶表示装置及び投射型液晶表示装置の製造方
法に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a projection type liquid crystal display device and a method of manufacturing the projection type liquid crystal display device. More specifically, the present invention relates to a multi-panel projection type liquid crystal display device using a plurality of TN positive type liquid crystal display elements and a method of manufacturing the projection type liquid crystal display device.
【０００２】[0002]
【従来の技術】従来の投射型液晶表示装置においては、
セル厚ムラの少ない（Δｎｄで０．３５〜０．４５）液
晶表示素子を用いて、光源からの分離光をスイッチング
後、再び光学系にて光合成して、拡大投影系により拡大
投影画像を得るものであった。2. Description of the Related Art In a conventional projection type liquid crystal display device,
Using a liquid crystal display element with a small cell thickness unevenness (0.35 to 0.45 in Δnd), after switching the separated light from the light source, photosynthesize again by the optical system, and obtain an enlarged projected image by the enlarged projection system. Was something.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の技術に
おいては、セル厚ムラの許容範囲が狭いため、液晶表示
素子を１枚しか用いない単板式投射型液晶表示装置に比
べて歩留まりが悪く、またセル厚を揃えていないために
合成後の投影画像において色ムラが生じるといった課題
を有する。However, in the prior art, since the allowable range of the cell thickness unevenness is narrow, the yield is lower than that of a single-panel projection type liquid crystal display device using only one liquid crystal display element. In addition, since the cell thicknesses are not uniform, there is a problem that color unevenness occurs in the projected image after synthesis.
【０００４】そこで本発明は、このような課題を解決す
るもので、その目的とするところは、ＴＮポジ型液晶表
示素子のセル厚ムラを揃えることにより、セル厚ムラの
許容範囲を広げて歩留まりを高くし、かつ投影画像の色
ムラをなくして、安価で高画質を有する投射型液晶表示
装置を得るところにある。Therefore, the present invention solves such a problem, and an object of the present invention is to make the cell thickness unevenness of the TN positive type liquid crystal display element uniform, thereby widening the allowable range of the cell thickness unevenness and increasing the yield. Therefore, there is a need to obtain a projection-type liquid crystal display device which is inexpensive and has high image quality by eliminating the color unevenness of the projected image.
【０００５】[0005]
【課題を解決するための手段】本発明の投射型液晶表示
装置は、上記した従来技術における問題点を解決するた
めになされたものであり、光源からの光を光学系で分離
した後、複数のＴＮポジ型液晶表示素子を用いて光スイ
ッチングし、再び光学系にて光合成して、拡大投影系に
より拡大投影画像を得る投射型液晶表示装置において、
前記複数のＴＮポジ型液晶表示素子のセル厚ムラは、基
準のセル厚に対して部分的に低いもの、或いは部分的に
高いもので構成されていることを特徴とする。このよう
な組み合わせを用いることにより、セル厚ムラの許容範
囲を広げて歩留まりを高くし、かつ投影画像の色ムラを
なくして、安価で高画質を得る。SUMMARY OF THE INVENTION The projection type liquid crystal display device of the present invention has been made to solve the above-mentioned problems in the prior art. In the projection type liquid crystal display device, the optical switching is performed by using the TN positive type liquid crystal display element, the light is synthesized again by the optical system, and the enlarged projection image is obtained by the enlargement projection system.
The cell thickness unevenness of the plurality of TN-positive liquid crystal display elements is configured to be partially lower or higher than a reference cell thickness. By using such a combination, the allowable range of the cell thickness unevenness is widened, the yield is increased, and the color unevenness of the projected image is eliminated.
【０００６】また、前記光合成する光学系にて奇数回反
射するＴＮポジ型液晶表示素子のセル厚ムラと偶数回反
射するＴＮポジ型液晶表示素子のセル厚ムラが合成する
光学系の反射面に対して線対称であるとよい。これによ
り、さらにセル厚ムラが大きいＴＮポジ型液晶表示素子
でも用いることができ、かつ色ムラを抑える効果が高ま
る。[0006] Further, the cell thickness unevenness of the TN-positive liquid crystal display element, which reflects odd times in the optical system for synthesizing light, and the cell thickness unevenness of the TN positive type liquid crystal display element, which reflects even times, are reflected on the reflecting surface of the optical system. It is good to be line symmetrical. Thereby, it can be used even in a TN-positive liquid crystal display element having a larger cell thickness unevenness, and the effect of suppressing color unevenness is enhanced.
【０００７】さらに、前記ＴＮポジ型液晶表示素子のセ
ル厚ムラが、Δｎｄ（Δｎ：液晶の複屈折異方性、ｄ：
液晶表示素子のセル厚（μｍ））で０．３０〜０．４５
の範囲或いは０．３５〜０．５５の範囲で組み合わせる
とよい。これにより、簡便にＴＮポジ型液晶表示素子の
セル厚ムラの組み合わせができ、かつ色ムラを抑えるこ
とができるため、より安価に目的を達することができ
る。Further, the cell thickness unevenness of the TN positive type liquid crystal display element is represented by Δnd (Δn: birefringence anisotropy of liquid crystal, d:
0.30 to 0.45 in cell thickness (μm) of liquid crystal display element
Or in the range of 0.35 to 0.55. This makes it possible to easily combine the cell thickness unevenness of the TN-positive liquid crystal display element and suppress the color unevenness, so that the object can be achieved at a lower cost.
【０００８】また、光源からの光を光学系で分離した
後、複数の液晶表示素子を用いて光スイッチングし、再
び光学系にて光合成して、拡大投影系により拡大投影画
像を得る投射型液晶表示装置の製造方法において、前記
液晶表示素子のセル厚ムラの測定を合成する光学系の反
射面に対して偶数に分割測定し、線対称となる領域と比
較して組み合わせると、色ムラが生じることがなくな
り、ＴＮポジ型液晶表示素子の組み替えが不要になるた
め、製造コストを抑えることができる。Also, after separating light from a light source by an optical system, a plurality of liquid crystal display elements are used for optical switching, and the optical system is again subjected to photosynthesis to obtain an enlarged projected image by an enlarged projection system. In the method of manufacturing a display device, when the measurement of the cell thickness unevenness of the liquid crystal display element is divided into even numbers with respect to the reflection surface of the optical system to be combined and compared with a line-symmetric region, color unevenness occurs. This eliminates the necessity of rearranging the TN positive type liquid crystal display element, thereby reducing the manufacturing cost.
【０００９】さらに、前記液晶表示素子のセル厚ムラを
測定し、組み合わせる際に光学系の輝度ムラを加味して
組み合わせると、光源、ダイクロイックミラー、ダイク
ロイックプリズム、各種偏光フィルター及び投射レンズ
等の光学系で生じる色ムラも抑えることができ、さらに
投影画像の色ムラを少なくする効果が高まる。Further, when the cell thickness unevenness of the liquid crystal display element is measured and combined taking into account the luminance unevenness of the optical system when combined, the optical system such as a light source, a dichroic mirror, a dichroic prism, various polarizing filters, and a projection lens can be obtained. Can be suppressed, and the effect of reducing the color unevenness of the projected image can be enhanced.
【００１０】[0010]
【発明の実施の形態】以下、本発明を図面に基づいて説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
【００１１】〔実施例１〕図１は、ＴＮポジ型液晶表示
素子の断面図である。Embodiment 1 FIG. 1 is a sectional view of a TN positive type liquid crystal display device.
【００１２】まず、透明基板１上にスイッチング素子と
してポリシリコンＴＦＴ、画素電極、データー線及び走
査線をマトリックス状に形成する。First, polysilicon TFTs, pixel electrodes, data lines, and scanning lines are formed in a matrix on the transparent substrate 1 as switching elements.
【００１３】次に、透明基板２上に遮光層及び共通電極
を形成する。Next, a light shielding layer and a common electrode are formed on the transparent substrate 2.
【００１４】次に、ポリシリコンＴＦＴ等が形成された
透明基板１と共通電極等が形成された透明基板２を略９
０゜に配向処理したのちに、スペーサー３として繊維径
４．０μｍのグラスファイバーが混入されたシール剤４
をスクリーン印刷或いはディスペンサー塗布等で透明基
板１に形成し、位置合わせを行いながら貼り合わせ、加
圧し、所定のセル厚が得られたところでシール剤４を硬
化させ、その間隙にΔｎ＝０．１のＴＮポジ液晶５を封
入する。Next, a transparent substrate 1 on which a polysilicon TFT or the like is formed and a transparent substrate 2 on which a common electrode or the like is formed
After orientation treatment to 0 °, sealing agent 4 mixed with glass fiber having a fiber diameter of 4.0 μm as spacer 3
Is formed on the transparent substrate 1 by screen printing or dispenser coating and the like, and is bonded while performing alignment, and is pressed. When a predetermined cell thickness is obtained, the sealant 4 is cured, and Δn = 0.1 Is sealed.
【００１５】次に、所定の形状に切断したのちに、偏光
板６を配向処理に合わせて偏光軸が略９０゜になるよう
に貼り付け、ＴＮポジ型液晶表示素子を得た。Next, after cutting into a predetermined shape, the polarizing plate 6 was adhered so that the polarization axis was approximately 90 ° in accordance with the alignment treatment, and a TN positive liquid crystal display device was obtained.
【００１６】次に、ＴＮポジ型液晶表示素子のセル厚ム
ラを測定したを行った、周辺部はスペーサー３によりセ
ル厚は、ほぼ一定で３．８〜４．２μｍ（Δｎｄ＝０．
３８〜０．４２）であったが、中央部は、液晶表示素子
の拡大投影による、スペーサーが黒表示時に白く抜けて
くるのを防ぐために、スペーサーの散布を行わなかっの
で、セル厚は、３．０〜５．５μｍ（Δｎｄ＝０．３０
〜０．５５）にばらついてしまった。Next, the cell thickness unevenness of the TN-positive liquid crystal display element was measured. The cell thickness was approximately constant at 3.8 to 4.2 μm (Δnd = 0.
However, in order to prevent the spacers from being whitened out during the black display by the enlarged projection of the liquid crystal display element, the spacers were not scattered, so that the cell thickness was 3 to 0.42). 0.0 to 5.5 μm (Δnd = 0.30
~ 0.55).
【００１７】ここで、本実施例では、中央部（表示領
域）にはスペーサーを散布しなかったためにセル厚ムラ
がより顕著に発生したが、スペーサーを散布した液晶表
示素子でも、スペーサーが黒表示時に白く抜けてくるの
を最小限にするためスペーサー散布量を増やすことがで
きない為や散布自体によるスペーサーの密度のばらつき
により同様のセル厚ムラが発生する。Here, in the present embodiment, the spacer was not scattered in the central part (display area), so that the cell thickness unevenness occurred more remarkably. However, even in the liquid crystal display device in which the spacer was scattered, the spacer displayed black. A similar cell thickness unevenness occurs because the amount of spacers to be sprayed cannot be increased in order to minimize the occurrence of white spots, and variations in spacer density due to spraying itself.
【００１８】図２は、請求項１或いは請求項３記載の発
明にかかわるＴＮポジ型液晶表示素子のセル厚ムラの概
略図である。FIG. 2 is a schematic diagram showing the cell thickness unevenness of the TN positive type liquid crystal display device according to the first or third aspect of the present invention.
【００１９】図２の如く、周辺部のセル厚に対して中央
部のセル厚が低いＴＮポジ型液晶表示素子と周辺部のセ
ル厚に対して中央部のセル厚が厚いＴＮポジ型液晶表示
素子を分類する。この時、中央部のセル厚ムラのレベル
をなるべく揃えた方が望まく、例えば、中央部と周辺部
のΔｎｄの差を０．０２ステップで組み合わせる（周辺
部のΔｎｄが０．４０の場合、中央部のΔｎｄが０．４
０〜０．４２のグループをＵＡグループ、中央部のΔｎ
ｄが０．４２〜０．４４のグループをＵＢグループ、・
・・・、中央部のΔｎｄが０．４０〜０．３８のグルー
プをＬＡグループ、中央部のΔｎｄが０．３８〜０．３
６のグループをＬＢグループ、・・・・と分類）。As shown in FIG. 2, a TN-positive liquid crystal display element in which the cell thickness in the central portion is smaller than the cell thickness in the peripheral portion, and a TN-positive liquid crystal display in which the cell thickness in the central portion is larger than the cell thickness in the peripheral portion. Classify the elements. At this time, it is desirable to make the levels of the cell thickness unevenness in the central portion as uniform as possible. For example, the difference of Δnd between the central portion and the peripheral portion is combined in 0.02 steps (when Δnd in the peripheral portion is 0.40, Δnd at the center is 0.4
The group of 0 to 0.42 is the UA group, and the center Δn
The group in which d is 0.42-0.44 is the UB group,
..., A group having a center Δnd of 0.40 to 0.38 is an LA group, and a center Δnd of 0.38 to 0.3
Group 6 is classified as LB group,...).
【００２０】図３は、本発明にかかわる投写型液晶表示
装置の光学系図である。メタルハライドランプ７からの
光をダイクロイックミラー８を用いて、Ｒ・Ｇ・Ｂの３
色光に分離し、上述の如くセル厚ムラのレベルを揃えた
ＴＮポジ型液晶表示素子１１、１２、１３で光スイッチ
ングさせ、再び合成プリズム９により３色光を合成し、
投射レンズ１０により拡大投影する。FIG. 3 is an optical system diagram of a projection type liquid crystal display device according to the present invention. The light from the metal halide lamp 7 is reflected by the dichroic mirror 8 into R, G, B
The light is separated into color lights, and the TN-positive liquid crystal display elements 11, 12, and 13 having uniform cell thickness unevenness levels as described above are optically switched, and the three color lights are synthesized again by the synthesis prism 9.
Enlarged projection is performed by the projection lens 10.
【００２１】ＴＮポジ型液晶表示素子のセル厚を揃えな
かったものは、Ｇ色のＴＮポジ型液晶表示素子だけが中
央部のセル厚が低いものはマゼンタに色づき、Ｒ色のＴ
Ｎポジ型液晶表示素子だけが中央部のセル厚が低いもの
はシアンに色づき、Ｂ色のＴＮポジ型液晶表示素子だけ
が中央部のセル厚が低いものはイエローに色づいていた
のに対し、本実施例の如くＴＮポジ型液晶表示素子のセ
ル厚を揃えたものは、中間調においても色づきのない優
れた投射画像が得られた。また、ＴＮポジ型液晶表示素
子のセル厚を揃えない時に比べ、セル厚ムラの使える範
囲が広がったためＴＮポジ型液晶表示素子の歩留まりが
高くなり、投写型液晶表示装置が安価に提供できるよう
になった。When the cell thickness of the TN positive type liquid crystal display element is not uniform, only the TN positive type liquid crystal display element of G color is colored magenta when the cell thickness at the center is small, and the T color of R color is obtained.
Whereas only the N-positive liquid crystal display element having a low cell thickness at the center was colored cyan, only the TN positive liquid crystal display element of B color was yellow when the cell thickness was low at the center. In the case where the cell thickness of the TN positive type liquid crystal display element was made uniform as in this example, an excellent projected image without coloring even in a halftone was obtained. Also, as compared with the case where the cell thickness of the TN positive type liquid crystal display element is not uniform, the usable range of the cell thickness unevenness is widened, so that the yield of the TN positive type liquid crystal display element is increased, and the projection type liquid crystal display device can be provided at low cost. became.
【００２２】〔実施例２〕実施例１と同様にしてＴＮポ
ジ型液晶表示素子を得たのちに、図３の光学系用のＴＮ
ポジ型液晶表示素子のセル厚測定を行い、組み合わせを
行った。[Embodiment 2] A TN positive type liquid crystal display device was obtained in the same manner as in Embodiment 1, and then a TN type optical system shown in FIG.
The cell thickness of the positive-type liquid crystal display element was measured and combined.
【００２３】図４、図５は、請求項２記載の発明にかか
わるＴＮポジ型液晶表示素子のＲ・Ｇ・Ｂパネル別のセ
ル厚ムラの概略図である。FIGS. 4 and 5 are schematic diagrams of cell thickness unevenness of each of the R, G, and B panels of the TN positive type liquid crystal display element according to the second aspect of the present invention.
【００２４】ＴＮポジ型液晶表示素子の表示領域を上下
左右に各４分割、合計１６分割し、分割した領域別に平
均のセル厚を算出する。The display area of the TN-positive liquid crystal display element is divided into four parts in each of the upper, lower, left, and right directions, for a total of 16 divisions, and the average cell thickness is calculated for each divided area.
【００２５】例えば、図３の光学系からなる投写型表示
装置の場合、Ｒ色のＴＮポジ型液晶表示素子１１、Ｂ色
のＴＮポジ型液晶表示素子１２の投影画像はＧ色のＴＮ
ポジ型液晶表示素子１３の投影画像に対して左右に反転
するため、図４の反転面１４に対してＲ色のＴＮポジ型
液晶表示素子１１とＢ色のＴＮポジ型液晶表示素子１２
はＧ色のＴＮポジ型液晶表示素子１３の線対称となる領
域と比較して（例えば、Ｒ、Ｂ色のＴＮポジ型液晶表示
素子の１ａはＧ色のＴＮポジ型液晶表示素子４ａと比
較）、平均セル厚の差が±０．２μｍ以下となるように
分類し、組み合わせる。For example, in the case of the projection type display device comprising the optical system shown in FIG. 3, the projected images of the R color TN positive liquid crystal display element 11 and the B color TN positive type liquid crystal display element 12 are G color TN.
Since the projected image of the positive liquid crystal display element 13 is inverted right and left, the TN positive liquid crystal display element 11 of R color and the TN positive liquid crystal display element 12 of B color are
Is compared with the line-symmetrical region of the G TN positive liquid crystal display element 13 (for example, 1a of the TN positive liquid crystal display element of R and B colors is compared with the TN positive liquid crystal display element 4a of G color). ), Are classified and combined so that the difference in average cell thickness is ± 0.2 μm or less.
【００２６】ここで、縦型の光学系の場合は、投影画像
は上下に反転するため、図５のように反転面１４に対し
て、上下に線対称となる領域で比較を行い分類する。Here, in the case of a vertical optical system, the projected image is inverted upside down, so that comparison is made in an area that is vertically symmetric with respect to the inversion plane 14 as shown in FIG.
【００２７】また、本実施例では、表示領域を１６分割
して判別を行ったが分割数は、１６分割に限定されるも
のではなく、多いほど良い。また、分割数は反射面に対
して偶数分割となるようにすれば、処理が簡単にでき
る。。In the present embodiment, the display area is divided into 16 regions for determination, but the number of divisions is not limited to 16, and the larger the number, the better. The processing can be simplified if the number of divisions is set to be an even number for the reflection surface. .
【００２８】以上のように、反転面に対して、線対称と
なる領域で比較を行い分類することにより、従来不良と
していたセル厚ムラが非対称なＴＮポジ型液晶表示素子
でも、色ムラのない優れた投影画像が得られ、ＴＮポジ
型液晶表示素子の歩留まりも大幅に改善し、安価に投写
型表示装置を実現することができた。As described above, by performing comparison and classification in a region that is line-symmetric with respect to the inversion surface, even a TN positive type liquid crystal display element having asymmetrical cell thickness unevenness, which has been regarded as defective, has no color unevenness. An excellent projected image was obtained, the yield of the TN-positive liquid crystal display device was greatly improved, and a projection display device could be realized at low cost.
【００２９】〔実施例３〕実施例１と同様にしてＴＮポ
ジ型液晶表示素子を得たのちに、実施例２と同様にし
て、ＴＮポジ型液晶表示素子のセル厚測定を行い、さら
に光学系の輝度ムラを測定し、組み込む光学系の波長特
性に合わせて、ＴＮポジ型液晶表示素子を分類し、組み
合わせを行った。Example 3 A TN-positive liquid crystal display device was obtained in the same manner as in Example 1, and the cell thickness of the TN-positive liquid crystal display device was measured in the same manner as in Example 2. The brightness unevenness of the system was measured, and the TN-positive liquid crystal display elements were classified and combined according to the wavelength characteristics of the optical system to be incorporated.
【００３０】図６は、請求項６記載の発明にかかわる投
射型表示装置の光学系のＲ・Ｇ・Ｂ別の輝度特性図であ
る。FIG. 6 is a diagram showing luminance characteristics of the optical system of the projection type display device according to the sixth aspect of the present invention for each of R, G, and B.
【００３１】Ｒ・Ｇ・Ｂ別に光学系の輝度分布をＴＮポ
ジ型液晶表示素子を取り付けない状態で投射し、投影画
像を１６分割して測定する。The luminance distribution of the optical system for each of R, G, and B is projected without the TN positive type liquid crystal display element attached, and the projected image is divided into 16 and measured.
【００３２】光源の影響で全体的に投影画像の中央部の
輝度が高く、ＢはＲＧ対して左上が輝度が低く、ＲはＧ
Ｂに対して右下の輝度が低い結果が得られた。The luminance of the central portion of the projected image is generally high due to the influence of the light source.
The result that the brightness at the lower right was lower than that of B was obtained.
【００３３】次に、この投写型表示装置の光学系の色ム
ラをなくすために、次のようにしてＴＮポジ型液晶表示
素子を分類した。Next, in order to eliminate color unevenness in the optical system of the projection type display device, TN positive type liquid crystal display elements were classified as follows.
【００３４】まず、中央部の輝度ムラを除去するため
に、Ｒ・Ｇ・Ｂ色のＴＮポジ型液晶表示素子のセル厚
は、中央部が周辺部に対してセル厚が低いものを選び、
次に、Ｂ色のＴＮポジ型液晶表示素子用は、投影画像は
左右反転するため、右上のセル厚が厚いものを選び、Ｒ
色のＴＮポジ型液晶表示素子用も、投影画像は左右反転
するため、左下のセル厚が厚いものを選んだ。以上のよ
うにＴＮポジ型液晶表示素子を選別し、投写型表示装置
に組み込んだ。First, in order to remove luminance unevenness in the central portion, the cell thickness of the TN positive type liquid crystal display device of R, G, B colors is selected such that the central portion has a smaller cell thickness than the peripheral portion.
Next, for the TN-positive liquid crystal display device for B color, the projected image is reversed left and right.
Also for the color TN-positive liquid crystal display device, the projected image is reversed left and right, so the lower left cell with a large cell thickness was selected. As described above, the TN-positive liquid crystal display device was selected and incorporated into a projection display device.
【００３５】以上のように、投写型表示装置の光学系の
輝度ムラを加味して、各Ｒ・Ｇ・Ｂ色光に用いるＴＮポ
ジ型液晶表示素子を分類することにより、さらに色ムラ
のない優れた投影画像が得られた、また、分類してから
組み込むことにより、ＴＮポジ型液晶表示素子の組み替
えが不要になり、製造コストを抑えることができ、安価
に投写型表示装置を実現することができた。As described above, by classifying the TN positive type liquid crystal display elements used for each of the R, G, and B light in consideration of the luminance unevenness of the optical system of the projection display apparatus, an excellent color unevenness can be obtained. When the projection image is obtained and classified and incorporated, it is not necessary to rearrange the TN-positive liquid crystal display element, the production cost can be reduced, and the projection display device can be realized at low cost. did it.
【００３６】[0036]
【発明の効果】以上説明してきたように、本発明の投射
型液晶表示装置は、ＴＮポジ型液晶表示素子のセル厚ム
ラを基準のセル厚に対して部分的に低いものどうし、或
いは部分的に高いものどうしで組み合わせて用いたこと
により、セル厚ムラの許容範囲を広くすることができ、
その結果歩留まりを高くすることができた。また、投影
画像の色ムラも組み合わせをしない時に比べて抑えるこ
とができ、安価で高画質の投写型表示装置を実現するこ
とができた。As described above, according to the projection type liquid crystal display device of the present invention, the cell thickness unevenness of the TN positive type liquid crystal display element is partially lower than the reference cell thickness or partially. By using a combination of high and low, the allowable range of cell thickness unevenness can be widened,
As a result, the yield could be increased. Further, color unevenness of the projected image can be suppressed as compared with the case where no combination is performed, and a low-cost and high-quality projection display device can be realized.
【００３７】また、光合成する光学系にて奇数回反射す
るＴＮポジ型液晶表示素子のセル厚ムラと偶数回反射す
るＴＮポジ型液晶表示素子のセル厚ムラが反射面に対し
て線対称とすることにより、さらにセル厚ムラが大きい
ＴＮポジ型液晶表示素子でも用いることができるように
なり、かつ色ムラを抑える効果が高まった。Further, the cell thickness unevenness of the TN positive type liquid crystal display element which reflects an odd number of times in the optical system for photosynthesis and the cell thickness unevenness of the TN positive type liquid crystal display element which reflects an even number of times are line-symmetric with respect to the reflection surface. As a result, it is possible to use even a TN positive type liquid crystal display element having a larger cell thickness unevenness, and the effect of suppressing color unevenness is enhanced.
【００３８】また、ＴＮポジ型液晶表示素子のセル厚ム
ラが、Δｎｄで０．３０〜０．４５の範囲或いは０．３
５〜０．５５の範囲で組み合わせれば、簡便にＴＮポジ
型液晶表示素子のセル厚ムラの組み合わせができ、色ム
ラを抑えることができたため、より安価に投写型表示装
置を実現することができた。。The cell thickness unevenness of the TN-positive liquid crystal display element is Δnd in the range of 0.30 to 0.45 or 0.3.
If the combination is in the range of 5 to 0.55, the combination of the cell thickness unevenness of the TN positive type liquid crystal display element can be easily achieved and the color unevenness can be suppressed, so that a projection display device can be realized at lower cost. did it. .
【００３９】さらに、光学系に組み込む前にＴＮポジ型
液晶表示素子のセル厚ムラを測定し、分類してから組み
込みことにより、ＴＮポジ型液晶表示素子の組み替えが
不要になり、製造コストを抑えることができた。Further, the cell thickness unevenness of the TN-positive liquid crystal display element is measured and classified before being incorporated in the optical system, and then the TN-positive liquid crystal display element is not required to be rearranged, thereby reducing the manufacturing cost. I was able to.
【００４０】また、光学系の輝度ムラを加味して組み合
わせを行うことにより、光源、ダイクロイックミラー、
ダイクロイックプリズム、各種偏光フィルター及び投射
レンズ等の光学系で生じる色ムラも抑えることができ、
さらに投影画像の色ムラを少なくする効果が高まった。Further, by performing the combination in consideration of the luminance unevenness of the optical system, a light source, a dichroic mirror,
Color unevenness that occurs in optical systems such as dichroic prisms, various polarizing filters, and projection lenses can also be suppressed,
Further, the effect of reducing the color unevenness of the projected image is enhanced.
【００４１】[0041]
【図１】ＴＮポジ型液晶表示素子の断面図。FIG. 1 is a cross-sectional view of a TN positive type liquid crystal display device.
【図２】本発明の実施例１のＴＮポジ型液晶表示素子の
セル厚ムラの概略図。FIG. 2 is a schematic diagram of cell thickness unevenness of a TN positive type liquid crystal display element of Example 1 of the present invention.
【図３】本発明の投写型液晶表示装置の光学系図。FIG. 3 is an optical system diagram of the projection type liquid crystal display device of the present invention.
【図４】本発明の実施例２のＴＮポジ型液晶表示素子の
Ｒ・Ｇ・Ｂパネル別のセル厚ムラの概略図。FIG. 4 is a schematic diagram of cell thickness unevenness for each of R, G, and B panels of a TN positive-type liquid crystal display element of Example 2 of the present invention.
【図５】本発明の実施例２のＴＮポジ型液晶表示素子の
Ｒ・Ｇ・Ｂパネル別のセル厚ムラの概略図。FIG. 5 is a schematic diagram of cell thickness unevenness for each of R, G, and B panels of a TN positive-type liquid crystal display element of Example 2 of the present invention.
【図６】本発明の実施例３の投射型表示装置の光学系の
Ｒ・Ｇ・Ｂ別の輝度特性図。FIG. 6 is a diagram illustrating luminance characteristics of the optical system of the projection display device according to the third embodiment of the present invention for each of R, G, and B.
１．透明基板 ２．透明基板 ３．スペーサー ４．シール剤 ５．液晶 ６．偏光板 ７．メタルハライドランプ ８．ダイクロイックミラー ９．合成プリズム １０．投射レンズ １１．Ｒ色のＴＮポジ型液晶表示素子 １２．Ｂ色のＴＮポジ型液晶表示素子 １３．Ｇ色のＴＮポジ型液晶表示素子 １４．反射面 1. Transparent substrate 2. Transparent substrate 3. Spacer 4. Sealant 5. Liquid crystal 6. Polarizing plate 7. 7. Metal halide lamp Dichroic mirror 9. Synthetic prism 10. Projection lens 11. R color TN positive type liquid crystal display element 12. TN positive type liquid crystal display device of B color 13. TN positive type liquid crystal display device of G color Reflective surface
Claims (5)
数のＴＮポジ型液晶表示素子を用いて光スイッチング
し、再び光学系にて光合成して、拡大投影系により拡大
投影画像を得る投射型液晶表示装置において、前記複数
のＴＮポジ型液晶表示素子のセル厚ムラは、基準のセル
厚に対して部分的に低いもの、或いは部分的に高いもの
で構成されていることを特徴とする投射型液晶表示装
置。After separating light from a light source by an optical system, optical switching is performed using a plurality of TN positive type liquid crystal display elements, and light is synthesized again by the optical system, and an enlarged projection image is obtained by an enlargement projection system. In the projection type liquid crystal display device, the cell thickness unevenness of the plurality of TN positive type liquid crystal display elements is configured to be partially lower or higher than a reference cell thickness. Projection type liquid crystal display device.
って、 前記光合成する光学系にて奇数回反射するＴＮポジ型液
晶表示素子のセル厚ムラと偶数回反射するＴＮポジ型液
晶表示素子のセル厚ムラが合成する光学系の反射面に対
して線対称であることを特徴とする投射型液晶表示装
置。2. The projection-type liquid crystal display device according to claim 1, wherein the TN-positive liquid crystal display element reflects an odd number of times in the optical system for combining light, and the TN positive type liquid crystal display reflects an even number of times. A projection type liquid crystal display device, wherein the cell thickness unevenness of the element is line-symmetric with respect to the reflection surface of the optical system to be synthesized.
晶表示装置であって、 前記ＴＮポジ型液晶表示素子のセル厚ムラが、Δｎｄ
（Δｎ：液晶の複屈折異方性、ｄ：液晶表示素子のセル
厚（μｍ））で０．３０〜０．４５の範囲或いは０．３
５〜０．５５の範囲で組み合わせることを特徴とする投
射型液晶表示装置。3. The projection type liquid crystal display device according to claim 1, wherein a cell thickness unevenness of the TN positive type liquid crystal display element is Δnd.
(Δn: birefringence anisotropy of liquid crystal, d: cell thickness (μm) of liquid crystal display element) in the range of 0.30 to 0.45 or 0.3.
A projection type liquid crystal display device characterized by being combined in a range of 5 to 0.55.
数の液晶表示素子を用いて光スイッチングし、再び光学
系にて光合成して、拡大投影系により拡大投影画像を得
る投射型液晶表示装置の製造方法において、前記液晶表
示素子のセル厚ムラの測定を合成する光学系の反射面に
対して偶数に分割測定し、線対称となる領域と比較して
組み合わせることを特徴とする投射型液晶表示装置の製
造方法。4. A projection type liquid crystal in which light from a light source is separated by an optical system, light is switched using a plurality of liquid crystal display elements, and light is synthesized again by the optical system to obtain an enlarged projected image by an enlarged projection system. In the method of manufacturing a display device, the projection is characterized in that the measurement of the cell thickness unevenness of the liquid crystal display element is evenly divided and measured with respect to the reflection surface of the optical system to be synthesized, and compared with a line-symmetric region. Manufacturing method of a liquid crystal display device.
造方法であって、 前記液晶表示素子のセル厚ムラを測定し、組み合わせる
際に光学系の輝度ムラを加味して組み合わせることを特
徴とする投射型液晶表示装置の製造方法。5. The method for manufacturing a projection type liquid crystal display device according to claim 4, wherein the unevenness in cell thickness of the liquid crystal display elements is measured, and the combination is performed taking into account the unevenness in brightness of the optical system when combining. Of manufacturing a projection type liquid crystal display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06601396A JP3269378B2 (en) | 1996-03-22 | 1996-03-22 | Projection type liquid crystal display device and method of manufacturing projection type liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06601396A JP3269378B2 (en) | 1996-03-22 | 1996-03-22 | Projection type liquid crystal display device and method of manufacturing projection type liquid crystal display device |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000196481A Division JP3277927B2 (en) | 2000-06-29 | 2000-06-29 | Projection type liquid crystal display |
| JP2000196482A Division JP3237670B2 (en) | 2000-06-29 | 2000-06-29 | Projection type liquid crystal display |
| JP2000196483A Division JP3277928B2 (en) | 1996-03-22 | 2000-06-29 | Projection type liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09258223A JPH09258223A (en) | 1997-10-03 |
| JP3269378B2 true JP3269378B2 (en) | 2002-03-25 |
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ID=13303642
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| JP06601396A Expired - Fee Related JP3269378B2 (en) | 1996-03-22 | 1996-03-22 | Projection type liquid crystal display device and method of manufacturing projection type liquid crystal display device |
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|---|---|
| JP (1) | JP3269378B2 (en) |
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| JP6990811B2 (en) | 2017-11-08 | 2022-01-12 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Magnetic field measuring element, magnetic field measuring device and magnetic field measuring system |
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| JP4574871B2 (en) * | 2001-01-25 | 2010-11-04 | 日東光学株式会社 | Alignment device and assembly device |
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1996
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| JP6990811B2 (en) | 2017-11-08 | 2022-01-12 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Magnetic field measuring element, magnetic field measuring device and magnetic field measuring system |
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| JPH09258223A (en) | 1997-10-03 |
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