JPH04429A - Projection type liquid crystal display device - Google Patents
Projection type liquid crystal display deviceInfo
- Publication number
- JPH04429A JPH04429A JP2101106A JP10110690A JPH04429A JP H04429 A JPH04429 A JP H04429A JP 2101106 A JP2101106 A JP 2101106A JP 10110690 A JP10110690 A JP 10110690A JP H04429 A JPH04429 A JP H04429A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- temp
- liquid crystal
- tube
- display device
- 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 description 12
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000003086 colorant Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
［従来の技術］
従来の投射型液晶表示装置は、ランプにより発°せられ
る熱による透過型液晶パネルや光学素子の温度上昇の防
止と、ランプチューブの劣化及びランプ寿命の低下の防
止のために、ランプの側面あるいは上下面等に、吹き出
し又は吸い込みタイプの冷却用ファンを有したクーリン
グ装置が用いられていた。[Detailed Description of the Invention] [Industrial Field of Application] [Prior Art] Conventional projection type liquid crystal display devices are designed to prevent the temperature of the transmissive liquid crystal panel and optical elements from rising due to heat generated by lamps, In order to prevent deterioration of the lamp tube and reduction in lamp life, a cooling device having a blow-out or suction type cooling fan on the side or top and bottom surfaces of the lamp has been used.
［発明が解決しようとする課題］
しかしながら光源であるランプの中には、ランプチュー
ブのクーリング条件によりランプチューブの温度変化を
化じ、これによりランプの発光光量の変化が生じるもの
がある。このようなランプに対して従来のクーリング装
置では、ランプの明るさを常にピークにした状態で保持
することが離しいという課題を有する。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、ランプのチューブ部温度を測定して、そのチュ
ーブ温度がランプの発光光量が最大となる温度で一定と
なるよう冷却用ファンのモーターの回転スピードを制御
するクーリング装置を提供するものである。[Problems to be Solved by the Invention] However, among lamps that are light sources, the temperature of the lamp tube changes depending on the cooling conditions of the lamp tube, which causes a change in the amount of light emitted from the lamp. Conventional cooling devices for such lamps have a problem in that it is difficult to maintain the brightness of the lamp at its peak. The present invention is intended to solve these problems.The purpose of the present invention is to measure the temperature of the tube part of the lamp so that the tube temperature remains constant at the temperature at which the amount of light emitted by the lamp is maximum. The present invention provides a cooling device that controls the rotational speed of a cooling fan motor.
［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、６枚の透過型液晶パネ
ルを有し、それぞれ赤色、緑色、青色の三原色の光で照
明され、６枚の透過型液晶パネルの映像を合成して投射
する表示装置において、光源であるランプのチューブ温
度を測定する温度センサーと、そのデータを取り込み演
算することによりランプ冷却用ファンのモーターの回転
スピードを制御する演算回路と、上記ランプ冷却ファン
とを有することを特徴とする。[Means for Solving the Problems] The projection type liquid crystal display device of the present invention has six transmissive liquid crystal panels, each of which is illuminated with light of the three primary colors of red, green, and blue. A display device that combines and projects images from a panel includes a temperature sensor that measures the tube temperature of the lamp that is the light source, and an arithmetic circuit that controls the rotation speed of the lamp cooling fan motor by taking in and calculating that data. , and the lamp cooling fan described above.
［実施例コ
第１図は、本発明の実施例におけるクーリング装置配置
図であって、ランプ１のチューブ温度はランプ１のリフ
レクタ−に取付けられた温度センサー２により測定され
る。測定データがマイフン等で構成された演算回路で処
理された後冷却用ファン６のモーターの駆動電圧が決定
されランプクーリングが行なわれる。[Embodiment] FIG. 1 is a layout diagram of a cooling device in an embodiment of the present invention, and the tube temperature of the lamp 1 is measured by a temperature sensor 2 attached to the reflector of the lamp 1. After the measured data is processed by an arithmetic circuit composed of a microphone and the like, the driving voltage of the motor of the cooling fan 6 is determined and lamp cooling is performed.
第２図は、第１図の簡単なブロック図である。FIG. 2 is a simplified block diagram of FIG.
第６図は、本発明の実施例における光学系配置図であっ
て、ランプ１より発した光束は、青反射ダイクロイック
ミラー５．赤反射ダイクロイックミラー６により、赤色
、緑色、青色の三原色に分解され、赤色、緑色、青色各
々の透過型液晶パネル８，９．１０を透過して、赤反射
ダイクロイックミラー１１．赤・青反射ダイクロイック
ミラー１２により合成され投射レンズ１ｚＩによりスク
リーン等に投射映像化される。FIG. 6 is a layout diagram of the optical system in an embodiment of the present invention, in which the light beam emitted from the lamp 1 is transmitted to the blue reflecting dichroic mirror 5. The red-reflecting dichroic mirror 6 separates the three primary colors of red, green, and blue, which are transmitted through the red, green, and blue transmissive liquid crystal panels 8, 9, and 10, and then reflected in the red-reflecting dichroic mirror 11. The red and blue reflection dichroic mirrors 12 combine the images, and the projection lens 1zI projects the images onto a screen or the like.
第４図は、ランプのチューブ温度に対するランプの明る
さの特性図である。この図かられかるようにランプの明
るさが最大となる領域があり、点灯時の種々の要因によ
るランプチューブの温度上昇あるいは温度低下によりラ
ンプの明るさが低下してしまう。FIG. 4 is a characteristic diagram of lamp brightness versus lamp tube temperature. As can be seen from this figure, there is a region where the brightness of the lamp is maximum, and the brightness of the lamp decreases as the temperature of the lamp tube increases or decreases due to various factors during lighting.
第５図は、他の実施例の配置図であり、合成側のダイク
ロイックミラー１１，１２の代わりにキューブプリズム
を使用した例である。FIG. 5 is a layout diagram of another embodiment, in which a cube prism is used in place of the dichroic mirrors 11 and 12 on the synthesis side.
また、本実施例では温度センサー２の取付は位置をラン
プのりフレフタ−としたが、ランプチューブに対して相
対的な温度変化が測定できる場所であればどこでも可能
である。Further, in this embodiment, the temperature sensor 2 is installed at the lamp holder, but it can be installed anywhere as long as the temperature change relative to the lamp tube can be measured.
［発明の効果コ
以上述べたように本発明によれば、温度センサーにより
制御された冷却ファンを配置することにより、環境条件
、ランプ積算点灯時間、ファンに固定された防塵用フィ
ルターの汚れ等によるランプチューブの温度上昇あるい
は温度低下による照度ダウンを引き起こすことなく、常
にランプのピークの明るさを保持でき明るい映像を提供
できるという効果を有する。[Effects of the Invention] As described above, according to the present invention, by arranging a cooling fan controlled by a temperature sensor, it is possible to prevent environmental conditions, cumulative lamp lighting time, dirt on the dustproof filter fixed to the fan, etc. This has the effect of constantly maintaining the peak brightness of the lamp and providing bright images without causing a decrease in illuminance due to a rise or fall in the temperature of the lamp tube.
第１図は、本発明のクーリング装置配置図Ｏ第２図は、
ブロック図。
第６図は、本発明の実施例における光学系配置図。
第４図は９、ランプのチューブ温度に対するランプの明
るさの特性図。
第５図は、他の実施例の配置図。
１・・・・・・・・・ランプ
２・・・・・・・・・温度センサー
６・・・・・・・・・冷却用ファン
４・・・・・・・・・熱線反射フィルター５・・・・・
・・・・青反射ダイクロイックミラー６・・・・・・・
・・赤反射ダイクロイックミラー７・・・・・・・・・
アルミ蒸着反射ミラー８°・・・・・・・・・赤色用透
過型液晶パネル９・・・・・−・・・緑色用透過型液晶
パネル１０・・・・・・・・・青色用透過型液晶パネル
１１・・・・・・・−・赤反射ダイクロイックミラー１
２・・・・・・・・・赤・青反射ダイクロイックミラー
３・・・・・・・・・投射レンズ
以
上Figure 1 is a layout diagram of the cooling device of the present invention; Figure 2 is:
Block Diagram. FIG. 6 is an optical system layout diagram in an embodiment of the present invention. FIG. 4 is a characteristic diagram of the brightness of the lamp with respect to the tube temperature of the lamp. FIG. 5 is a layout diagram of another embodiment. 1... Lamp 2... Temperature sensor 6... Cooling fan 4... Heat ray reflection filter 5・・・・・・
...Blue reflective dichroic mirror 6...
・・Red reflective dichroic mirror 7・・・・・・・・・
Aluminum evaporated reflective mirror 8°...Transmissive liquid crystal panel for red color 9...Transmissive liquid crystal panel for green color 10...Transmissive liquid crystal panel for blue color Type LCD panel 11... Red reflective dichroic mirror 1
2... Red/blue reflective dichroic mirror 3... More than a projection lens
Claims (1)
色、青色の三原色の光で照明され、３枚の透過型液晶パ
ネルの映像を合成して投射する表示装置において、 ｂ）光源であるランプのチューブ部温度を測定する温度
センサーと、 ｃ）そのデータを取り込み演算することによりランプ冷
却用ファンのモーターの回転スピードを制御する演算回
路と、 ｄ）上記ランプ冷却用ファンとを有することを特徴とす
る投射型液晶表示装置。[Claims] a) A display device having five transmissive liquid crystal panels, each illuminated with light of the three primary colors of red, green, and blue, and combining and projecting images from the three transmissive liquid crystal panels. b) a temperature sensor that measures the temperature of the tube portion of the lamp that is the light source; c) a calculation circuit that controls the rotation speed of the lamp cooling fan motor by taking in and calculating the data; and d) the lamp cooling. 1. A projection type liquid crystal display device, comprising: a fan for use with a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101106A JP2959037B2 (en) | 1990-04-17 | 1990-04-17 | Projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101106A JP2959037B2 (en) | 1990-04-17 | 1990-04-17 | Projection display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04429A true JPH04429A (en) | 1992-01-06 |
| JP2959037B2 JP2959037B2 (en) | 1999-10-06 |
Family
ID=14291828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2101106A Expired - Fee Related JP2959037B2 (en) | 1990-04-17 | 1990-04-17 | Projection display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2959037B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19524131A1 (en) * | 1995-07-03 | 1997-01-09 | Thomson Brandt Gmbh | Video signal controllable, handheld optical image projector - displays image supplied from video recorder to liquid crystal light valve traversed by arc light and cooled by draught of extractor fan |
| US5829855A (en) * | 1996-02-21 | 1998-11-03 | Nikon Corporation | Projection-type display apparatus |
| CN107942610A (en) * | 2017-11-28 | 2018-04-20 | 苏州佳世达光电有限公司 | Projector radiating control system and method |
-
1990
- 1990-04-17 JP JP2101106A patent/JP2959037B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19524131A1 (en) * | 1995-07-03 | 1997-01-09 | Thomson Brandt Gmbh | Video signal controllable, handheld optical image projector - displays image supplied from video recorder to liquid crystal light valve traversed by arc light and cooled by draught of extractor fan |
| US5829855A (en) * | 1996-02-21 | 1998-11-03 | Nikon Corporation | Projection-type display apparatus |
| CN107942610A (en) * | 2017-11-28 | 2018-04-20 | 苏州佳世达光电有限公司 | Projector radiating control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2959037B2 (en) | 1999-10-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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Free format text: PAYMENT UNTIL: 20080730 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
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| LAPS | Cancellation because of no payment of annual fees |