JPH0346692A - Color liquid crystal display device - Google Patents
Color liquid crystal display deviceInfo
- Publication number
- JPH0346692A JPH0346692A JP1182202A JP18220289A JPH0346692A JP H0346692 A JPH0346692 A JP H0346692A JP 1182202 A JP1182202 A JP 1182202A JP 18220289 A JP18220289 A JP 18220289A JP H0346692 A JPH0346692 A JP H0346692A
- Authority
- JP
- Japan
- Prior art keywords
- primary color
- liquid crystal
- crystal display
- color
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 56
- 230000010287 polarization Effects 0.000 claims abstract description 31
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 239000003086 colorant Substances 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
液晶表示素子は低消費電力のフラットパネルデイスプレ
ィやプロジェクション用のライドパ／ｌ／７として広く
応用されている。特に３つの原色を３つの液晶表示素子
で独立に変調し光学系で合成投射するカラー液晶プロジ
ェクタ−は従来ＯＣＲ，Ｔを用いたプロジェクタ−と比
べ、小型、軽量、低コスト、操作性容易等の長所を有し
実用化が始まっている。このカラー液晶プロジェクタ−
は投影面の後方（リアプロジェクション方式）で見れば
、直視型と等価であり、大画面前面投影（フロントプロ
ジェクション方式）としてだけではなく、すべての表示
の用途に応用可能である。本発明はこのような全ての表
示用途に置き換え可能なカラー液晶プロジェクタ−用の
カラー液晶表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] Liquid crystal display elements are widely applied as low power consumption flat panel displays and RidePa/l/7 for projection. In particular, color liquid crystal projectors that independently modulate three primary colors using three liquid crystal display elements and project them using an optical system are smaller, lighter, lower cost, and easier to operate than conventional projectors that use OCR and T. It has advantages and is now being put into practical use. This color LCD projector
When viewed from behind the projection surface (rear projection method), it is equivalent to a direct view type, and can be applied not only to a large screen front projection (front projection method) but also to all display applications. The present invention relates to a color liquid crystal display device for a color liquid crystal projector that can be used in all such display applications.
第２図は市販されているカラー液晶プロジェクタ−に用
いられているカラー液晶表示装置の例である。基本的に
は、３つの１原色変調用透過型液晶表示素子（第１原色
変調用透過型液晶表示素子２１、第２原色変調用透過型
液晶表示素子２２、第３原色変調用透過型液晶表示素子
２６．４つのダイクロイックミラー面（ダイクロイック
□ラー面Ａ：２４、ダイクロイックミラー面Ｂ：２５、
ダイクロインクミラー面Ｃ：２６、ダイクロイックミラ
ー面Ｄ：２７．３つの反射面（反射面Ａ：２９、反射面
Ｂ：３０．反射面Ｃ：６１から構成され、第１原色、第
２原色、第３原色の少なくとも３つの原色からなる入射
光を、第１原色変調用、第２原色変調用、第３原色変調
用の少なくとも３つの液晶表示素子で変調し、第１原色
、第２原色、第３原色のそれぞれの変調光を合成して同
一方向に出射する機能を有する。即ち、第１原色入射光
６２はダイクロイックミラー面Ａ：２４を透過し反射面
Ａ：２９で反射し、第１原色変調用透過型液晶表示素子
２１に入射する。第２原色入射光３６はダイクロイック
□ラー面Ａ：２４、ダイクロインクミラー面Ｂ：２５で
反射し第２原色変調用透過型液晶表示素子に入射する。FIG. 2 is an example of a color liquid crystal display device used in a commercially available color liquid crystal projector. Basically, there are three transmissive liquid crystal display elements for modulating one primary color (a transmissive liquid crystal display element 21 for modulating the first primary color, a transmissive liquid crystal display element 22 for modulating the second primary color, and a transmissive liquid crystal display element 22 for modulating the third primary color). Element 26. Four dichroic mirror surfaces (dichroic square surface A: 24, dichroic mirror surface B: 25,
Dichroic ink mirror surface C: 26, dichroic mirror surface D: 27. Consists of three reflective surfaces (reflective surface A: 29, reflective surface B: 30, reflective surface C: 61, first primary color, second primary color, second primary color, Incident light consisting of at least three primary colors is modulated by at least three liquid crystal display elements for modulating the first primary color, modulating the second primary color, and modulating the third primary color. It has a function of combining the modulated light of each of the three primary colors and emitting it in the same direction.That is, the first primary color incident light 62 passes through the dichroic mirror surface A: 24, is reflected by the reflective surface A: 29, and the first primary color The second primary color incident light 36 is reflected by the dichroic mirror surface A: 24 and the dichroic ink mirror surface B: 25, and enters the second primary color modulation transmission type liquid crystal display element 21. .
第３原色入射光３４はダイクロイックミラー面Ａ：２４
で反射し、ダイクロイックミラー面Ｂ：２５を透過、反
射面Ｂ：６０、反射ｔｉｃ ： ３１で反射して第３原
色変調用透過型液晶表示素子に入射する。それぞれの原
色変調用液晶表示素子で変調された各原色の変調光はダ
イクロイックプリズム２８上に形成された互いに直交す
るダイクロイックミラー面Ｃ：２６とダイクロイックミ
ラー面Ｄ：２７で合成され第１原色変調光６６、第２原
色変調光６７、第３原色変調光６８として出射される。The third primary color incident light 34 is dichroic mirror surface A: 24
It is reflected by the dichroic mirror surface B: 25, is reflected by the reflection surface B: 60, and is reflected by the reflection surface B: tic: 31, and enters the transmission type liquid crystal display element for third primary color modulation. The modulated light of each primary color modulated by each primary color modulation liquid crystal display element is synthesized by a dichroic mirror surface C: 26 and a dichroic mirror surface D: 27, which are orthogonal to each other, formed on the dichroic prism 28 to produce first primary color modulated light. 66, second primary color modulated light 67, and third primary color modulated light 68.
３つの１原色変調用透過型液晶表示素子、４つのダイク
ロイックミラー面、２つの反射面から構成されるプロジ
ェクタ−も市販されている。A projector constructed of three transmissive liquid crystal display elements for modulating one primary color, four dichroic mirror surfaces, and two reflective surfaces is also commercially available.
従来例の欠点はダイクロイックミラー面、反射面等の高
価な光学部品を数多く必要とするために、高コストとな
る点と、大きくなってしまう点にある。The drawbacks of the conventional example are that it requires a large number of expensive optical components such as dichroic mirror surfaces and reflective surfaces, resulting in high cost and large size.
本発明の少ない光学部品で小さな体積で構成可能なカラ
ー液晶プロジェクタ−用のカラー液晶表示装置の提供を
目的とする。It is an object of the present invention to provide a color liquid crystal display device for a color liquid crystal projector that can be configured with a small volume and a small number of optical components.
本発明に於ては、入射光は第１原色の第１偏光と、第２
原色及び第３原色の第２偏光のみを選択的に透過するカ
ラー偏光子を通過し、続いて入射方向に則してほぼ４５
度に配置された偏光分離面に入射し、第１原色の第１偏
光は該偏光分離面で反射し第１原色変調用反射型液晶表
示素子に入射し、残りの第２原色、第３原色の第２偏光
は該偏光分離面を透過して光の進行方向に対してほぼ４
５度に記載されたダイクロイックミラー面に入射し、該
ダイクロイックミラー面によって第２原色は反射されて
、光の進行方向に対してほぼ垂直の位置に配置された第
２原色変調用反射型液晶表示素子に入射し、第３原色は
透過１−で光の進行方法にほぼ平行の位置に配置された
第３原色変調用反射型液晶表示素子に入射し、第１原色
は反射型液晶表示素子によって偏光変調された後再び前
光分離面に入射し、該偏光分離面によって第２偏光に変
調された成分のみがそのまま透過し、第２原色、第３原
色は反射型液晶表示素子によって偏光変調された後再び
ダイクロインクミラー面によって同一方向に合成され偏
光分離面に入射し、偏光分離面によって第１偏光に変調
された成分のみが反射すると言５構成をとる。この構成
では光学部品は１つのダイクロイックミラー面と１つの
偏光分離面と安価なカラー偏光子のみでよく光学部品の
コストは約半分になる。−！ｆ、た体積的にも従来例の
２〜３分の１で済む。In the present invention, the incident light has a first polarized light of a first primary color and a second polarized light of a first primary color.
It passes through a color polarizer that selectively transmits only the second polarized light of the primary color and the third primary color, and then approximately 45
The first polarized light of the first primary color is reflected by the polarization separation surface and enters the reflective liquid crystal display element for modulating the first primary color, and the remaining second and third primary colors are The second polarized light is transmitted through the polarization separation plane and is approximately 4
A reflective liquid crystal display for modulating a second primary color, the second primary color being incident on a dichroic mirror surface having an angle of 5 degrees, reflected by the dichroic mirror surface, and disposed at a position substantially perpendicular to the traveling direction of light. The third primary color enters the reflective liquid crystal display element for modulating the third primary color, which is arranged at a position almost parallel to the traveling direction of the light, and the first primary color is transmitted by the reflective liquid crystal display element. After being polarized, the light enters the front light separation surface again, and only the component modulated to the second polarization by the polarization separation surface is transmitted as is, while the second and third primary colors are polarized and modulated by the reflective liquid crystal display element. After that, they are again combined in the same direction by the dichroic ink mirror surface and are incident on the polarization separation surface, and only the component modulated into the first polarization is reflected by the polarization separation surface. In this configuration, only one dichroic mirror surface, one polarization separation surface, and an inexpensive color polarizer are required as optical components, and the cost of the optical components is approximately halved. -! In terms of f, the volume is also two to one-third that of the conventional example.
第１図は本発明のカラー液晶表示装置の第１の実施例で
ある。基本的には、３つの原色変調用反射型液晶表示素
子（第１原色変調用反射型液晶表示素子１、第２原色変
調用反射型液晶表示素子２、第３原色変調用反射型液晶
表示素子６．１組のカラー偏光子４．１つのダイクロイ
ックミラー面５．１つの偏光分離面６からなる。FIG. 1 shows a first embodiment of a color liquid crystal display device of the present invention. Basically, there are three reflective liquid crystal display elements for primary color modulation (reflective liquid crystal display element 1 for first primary color modulation, reflective liquid crystal display element 2 for second primary color modulation, and reflective liquid crystal display element for third primary color modulation). 6. Consists of one set of color polarizers 4, one dichroic mirror surface 5, and one polarization separation surface 6.
カラー偏光子４は具体的には吸収軸の直交する２枚の２
色性のカラー偏光板１６．１７からなり、第１のカラー
偏光板１６は第２原色、第３原色の第１偏光１０．１２
を吸収、第２偏光９．１１を透過し、第２のカラー偏光
板１７は第１原色の第２偏光７を吸収、第１偏光８を透
過する。よって、該カラー偏光子４を選択的に通過する
入射光は第１原色の第１偏光８と、第２原色及び第３原
色の第２偏光９、−１１のみとなる。Specifically, the color polarizer 4 consists of two sheets 2 whose absorption axes are perpendicular to each other.
The first color polarizing plate 16 is composed of chromatic color polarizing plates 16 and 17, and the first color polarizing plate 16 has first polarized light 10.12 of the second primary color and the third primary color.
The second color polarizing plate 17 absorbs the second polarized light 7 of the first primary color and transmits the first polarized light 8. Therefore, the incident light that selectively passes through the color polarizer 4 is only the first polarized light 8 of the first primary color and the second polarized light 9 and -11 of the second and third primary colors.
続いて入射方向に対してほぼ４５度に配置された偏光分
離面６に入射し、第］原色の第１偏光８は該偏光分離面
６で反射し第１原色変調用反射型液晶表示素子１に入射
し、残りの第２原色、第３原色の第２偏光９．１１は該
偏光分離面６を透過して光の進行方向に対してほぼ４５
度に配置されたダイクロイックミラー面５に入射し、該
ダイクロイックミラー面５によって第２原色の第２偏光
９は反射されて、光の進行方向に対してほぼ垂直の位置
に配置された第２原色変調用反射型液晶表示素子２に入
射し、第３原色の第２偏光１１は透過して光の進行方向
にほぼ平行の位置に配置された第３原色変調用反射型液
晶表示素子６に入射し、第］原色は反射型液晶表示素子
１によって偏光変調された後再び偏光分離面乙に入射し
、該偏光分離面によって第２偏光に変調された成分のみ
が第１原色変調光１６としてそのまま透過し、第２原色
、第３原色は反射型液晶表示素子２．６によって偏光変
調された後再びダイクロイックミラー面５によって同一
方向に合成され偏光分離面６に入射し、第１偏光に変調
された成分のみが偏光分離面６によって第２原色変調光
１４、第３原色変調光１５として反射する。Subsequently, the first polarized light 8 of the first primary color is reflected by the polarization separation surface 6 disposed at approximately 45 degrees with respect to the incident direction, and is reflected by the first primary color modulating reflective liquid crystal display element 1. The second polarized light 9.11 of the remaining second and third primary colors is transmitted through the polarization separation surface 6 and is approximately 45 degrees in the direction of travel of the light.
The second polarized light 9 of the second primary color is incident on the dichroic mirror surface 5 arranged at the same angle, and the second polarized light 9 of the second primary color is reflected by the dichroic mirror surface 5. The second polarized light 11 of the third primary color enters the reflective liquid crystal display element 2 for modulation, and is transmitted, and enters the reflective liquid crystal display element 6 for third primary color modulation, which is arranged at a position substantially parallel to the traveling direction of the light. After being polarized and modulated by the reflective liquid crystal display element 1, the primary color enters the polarization separation surface B again, and only the component modulated into the second polarization by the polarization separation surface remains as the first primary color modulated light 16. After being transmitted, the second and third primary colors are polarized and modulated by the reflective liquid crystal display element 2.6, and then combined in the same direction by the dichroic mirror surface 5, incident on the polarization separation surface 6, and modulated into the first polarized light. Only those components are reflected by the polarization separation surface 6 as second primary color modulated light 14 and third primary color modulated light 15.
以上の実施例で明らかな如く、本発明は従来にないコン
パクトで低コストのカラー液晶プロジェクタ−用のカラ
ー液晶表示装置を提供する。As is clear from the above embodiments, the present invention provides a compact and low-cost color liquid crystal display device for a color liquid crystal projector that has never been seen before.
体積的な評価では、ダイクロイックミラー面（或はプリ
ズム）、反射面、偏光分離面の総数がおおよそ体積に比
例する。カラー偏光子はフィルムであり殆ど体積を占有
しない。第２図の従来例では総数６（ダイクロイックミ
ラー面２、グイクロイックプリズム１、反射面３）、他
の従来例でも総数６（ダイクロイックミラー面４、反射
面２）である。それに対し、第１図の本発明の実施例で
は総数２（ダイクロインクミラー面］、偏光分離面１）
であり、従来例と比べ体積は約３分の１である。In volumetric evaluation, the total number of dichroic mirror surfaces (or prisms), reflective surfaces, and polarization separation surfaces is approximately proportional to the volume. Color polarizers are films and occupy little volume. In the conventional example shown in FIG. 2, the total number is 6 (dichroic mirror surface 2, gicchroic prism 1, and reflective surface 3), and in the other conventional examples, the total number is 6 (dichroic mirror surface 4, reflective surface 2). On the other hand, in the embodiment of the present invention shown in FIG.
The volume is approximately one-third that of the conventional example.
カラー偏光子は安価であり、光学部品コストも前記総数
で評価でき、本発明では従来例と比べ半減できる。Color polarizers are inexpensive, and the cost of optical components can be evaluated based on the total number, and the present invention can reduce the cost by half compared to the conventional example.
なお実施例では記載しなかったが、本発明の基本構成に
反射板、レンズ等の光学部品を追加して光路を曲げたり
距離や面積を変えても本発明を逸脱しない。Although not described in the embodiments, the invention does not depart from the invention even if optical parts such as a reflector or lens are added to the basic structure of the invention to bend the optical path or change the distance or area.
第１図は本発明のカラー液晶表示装置の実施例を示す光
路図、第２図は従来例のカラー液晶表示装置の一例を示
す光路図である。
１・・・・・・第１原色変調用反射型液晶表示素子、２
・・・・・・第２原色変調用反射型液晶表示素子、６・
・・・・・第３原色変調用反射型液晶表示素子、４・・
・・・・カラー偏光子、
５・・・・・・第２のダイクロイックミラー面、６・・
・・・・偏光分離面。FIG. 1 is an optical path diagram showing an embodiment of a color liquid crystal display device of the present invention, and FIG. 2 is an optical path diagram showing an example of a conventional color liquid crystal display device. 1... Reflective liquid crystal display element for first primary color modulation, 2
...Reflective liquid crystal display element for second primary color modulation, 6.
...Reflective liquid crystal display element for third primary color modulation, 4...
...Color polarizer, 5...Second dichroic mirror surface, 6...
...Polarization separation surface.
Claims (1)
からなる入射光を、第１原色変調用、第２原色変調用、
第３原色変調用の少なくとも３つの液晶表示素子で変調
し、第１原色、第２原色、第３原色のそれぞれの変調光
を合成して同一方向に出射する機能を有するカラー液晶
表示装置に於いて、前記入射光は第１原色の第１偏光と
、第２原色及び第３原色の第２偏光のみを選択的に透過
するカラー偏光子を通過し、続いて入射方向に対してほ
ぼ４５度に配置された偏光分離面に入射し、第１原色の
第１偏光は該偏光分離面で反射し第１原色変調用反射型
液晶表示素子に入射し、残りの第２原色、第３原色の第
２偏光は該偏光分離面を透過して光の進行方向に対して
ほぼ４５度に配置されたダイクロイックミラー面に入射
し、該ダイクロイックミラー面によって第２原色は反射
されて、光の進行方向に対してほぼ垂直の位置に配置さ
れた第２原色変調用反射型液晶表示素子に入射し、第３
原色は透過して光の進行方向にほぼ平行の位置に配置さ
れた第３原色変調用反射型液晶表示素子に入射し、第１
原色は反射型液晶表示素子によって偏光変調された後再
び偏光分離面に入射し、該偏光分離面によって第２偏光
に変調された成分のみがそのまま透過し、第２原色、第
３原色は反射型液晶表示素子によって偏光変調された後
再びダイクロイックミラー面によって同一方向に合成さ
れ偏光分離面に入射し、偏光分離面によって第１偏光に
変調された成分のみが反射する事を特徴とするカラー液
晶表示装置。Incident light consisting of at least three primary colors, a first primary color, a second primary color, and a third primary color, for first primary color modulation, second primary color modulation,
A color liquid crystal display device that has a function of modulating light with at least three liquid crystal display elements for modulating the third primary color, combining the modulated light of the first primary color, the second primary color, and the third primary color and outputting the modulated light in the same direction. The incident light passes through a color polarizer that selectively transmits only the first polarized light of the first primary color and the second polarized light of the second and third primary colors, and then passes through a color polarizer that selectively transmits only the first polarized light of the first primary color and the second polarized light of the second and third primary colors, and then passes through a color polarizer that selectively transmits only the first polarized light of the first primary color and the second polarized light of the second and third primary colors. The first polarized light of the first primary color is reflected by the polarization separation surface and enters the reflective liquid crystal display element for modulating the first primary color, and the remaining second and third primary colors are The second polarized light passes through the polarization separation surface and enters a dichroic mirror surface arranged at approximately 45 degrees with respect to the direction of travel of the light, and the second primary color is reflected by the dichroic mirror surface, and the second primary color is reflected in the direction of travel of light. The light enters the reflective liquid crystal display element for modulating the second primary color, which is placed almost perpendicular to the
The primary colors pass through and enter a reflective liquid crystal display element for modulating the third primary color, which is placed approximately parallel to the direction of light propagation.
The primary colors are polarized by a reflective liquid crystal display element and then enter the polarization separation surface again, and only the component modulated into the second polarization by the polarization separation surface is transmitted as is, and the second and third primary colors are reflected. A color liquid crystal display characterized in that the polarized light is modulated by a liquid crystal display element, then combined in the same direction by a dichroic mirror surface, and is incident on a polarization separation surface, and only the component modulated to the first polarization is reflected by the polarization separation surface. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1182202A JP2859303B2 (en) | 1989-07-14 | 1989-07-14 | Color liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1182202A JP2859303B2 (en) | 1989-07-14 | 1989-07-14 | Color liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0346692A true JPH0346692A (en) | 1991-02-27 |
| JP2859303B2 JP2859303B2 (en) | 1999-02-17 |
Family
ID=16114141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1182202A Expired - Fee Related JP2859303B2 (en) | 1989-07-14 | 1989-07-14 | Color liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2859303B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06281931A (en) * | 1993-03-25 | 1994-10-07 | Nec Corp | Liquid crystal projection device |
| JP2002540467A (en) * | 1999-03-26 | 2002-11-26 | ユナキス・バルツェルス・アクチェンゲゼルシャフト | Spectrum light splitting / recombining apparatus and spectrum selective light modulation method |
| US6781640B1 (en) | 1999-11-15 | 2004-08-24 | Sharp Laboratories Of America, Inc. | Projection display having polarization compensator |
| KR100481400B1 (en) * | 1999-06-04 | 2005-04-07 | 샤프 가부시키가이샤 | Image display apparatus |
| US6995917B1 (en) | 1999-04-08 | 2006-02-07 | Sharp Laboratories Of America, Inc. | Projection display system using polarized light |
| US7101047B2 (en) | 2000-03-31 | 2006-09-05 | Sharp Laboratories Of America, Inc. | Projection display systems for light valves |
| JP2009121210A (en) * | 2007-11-09 | 2009-06-04 | Hatsue Watanabe | Window only for ventilation |
-
1989
- 1989-07-14 JP JP1182202A patent/JP2859303B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06281931A (en) * | 1993-03-25 | 1994-10-07 | Nec Corp | Liquid crystal projection device |
| JP2002540467A (en) * | 1999-03-26 | 2002-11-26 | ユナキス・バルツェルス・アクチェンゲゼルシャフト | Spectrum light splitting / recombining apparatus and spectrum selective light modulation method |
| US6995917B1 (en) | 1999-04-08 | 2006-02-07 | Sharp Laboratories Of America, Inc. | Projection display system using polarized light |
| KR100481400B1 (en) * | 1999-06-04 | 2005-04-07 | 샤프 가부시키가이샤 | Image display apparatus |
| US6781640B1 (en) | 1999-11-15 | 2004-08-24 | Sharp Laboratories Of America, Inc. | Projection display having polarization compensator |
| US7101047B2 (en) | 2000-03-31 | 2006-09-05 | Sharp Laboratories Of America, Inc. | Projection display systems for light valves |
| JP2009121210A (en) * | 2007-11-09 | 2009-06-04 | Hatsue Watanabe | Window only for ventilation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2859303B2 (en) | 1999-02-17 |
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