JPH01183037A - Light bulb type projection display device - Google Patents
Light bulb type projection display deviceInfo
- Publication number
- JPH01183037A JPH01183037A JP88388A JP88388A JPH01183037A JP H01183037 A JPH01183037 A JP H01183037A JP 88388 A JP88388 A JP 88388A JP 88388 A JP88388 A JP 88388A JP H01183037 A JPH01183037 A JP H01183037A
- Authority
- JP
- Japan
- Prior art keywords
- deflecting plate
- light
- polarizing plate
- temperature
- light bulb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 8
- 230000006866 deterioration Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 3
- 230000031700 light absorption Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 230000032900 absorption of visible light Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ライトバルブを用いた投写型光示装置に関す
る。更に拝しくけ、近来その要求が高まっている高輝度
投写型表示装置に利用する偏光板に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projection type optical display device using a light valve. The present invention also relates to polarizing plates used in high-brightness projection display devices, for which demand has been increasing recently.
従来の透過型ライトバルブを用いた投写型カラー表示装
置は、ＳＩＯ’８６ダイジエスト発表番号２０．４に記
載されている。光源から放射された元は、パネルを照射
するが、照明光に含まれる赤外線による偏光板の昇温に
よる特性劣化を防止するために、赤外線カットフィルタ
ーが設けられている。A projection type color display device using a conventional transmission type light valve is described in SIO'86 Digest Publication No. 20.4. The light emitted from the light source illuminates the panel, but an infrared cut filter is provided to prevent characteristic deterioration due to temperature rise of the polarizing plate due to infrared rays contained in the illumination light.
しかし市場の希求する高輝度投写を行なうためには、出
力光束の大きい光源を必要とし、ライトバルブを照射す
る光のエネルギーは太陽光の数倍の強力光線となる。偏
光板の可視波長域におけるｒＥＬ収率は約６０％′と大
きいため、可視光線の吸収による偏光板の温度上昇が生
じ、従来技術による赤外線除去だけでは効果がなく、偏
光板の劣化・焼損が生じていた。However, in order to perform the high-brightness projection desired by the market, a light source with a large output luminous flux is required, and the energy of the light irradiating the light valve is several times more powerful than sunlight. Since the rEL yield of the polarizing plate in the visible wavelength region is as high as approximately 60%', the temperature of the polarizing plate increases due to absorption of visible light, and conventional technology that removes infrared rays alone is ineffective, leading to deterioration and burnout of the polarizing plate. It was happening.
本発明の目的は、高エネルギーの照射による劣化の少な
い偏光板冷却方法を提供し、高輝度投写を実験し、かつ
偏光板寿命の延長をはかるものである。 ゛
〔問題点を解決するための手段〕
本発明のライトバルブ式投写表示装置は、ライトバルブ
に係合する偏光板の面積を、前記ライトバルブのシャン
タ部の１．５倍以上の大きさとし、前記偏光板を揺動も
しくは回動する装置を設けたことを特徴としている。An object of the present invention is to provide a method for cooling a polarizing plate that causes less deterioration due to high-energy irradiation, to experiment with high-brightness projection, and to extend the life of the polarizing plate. [Means for solving the problem] In the light valve type projection display device of the present invention, the area of the polarizing plate that engages with the light valve is 1.5 times or more larger than the shunter portion of the light valve, The present invention is characterized in that a device for swinging or rotating the polarizing plate is provided.
本発明の上記構成によれば、光源による上記ライトバル
ブの照射光は、上記偏光板の一部のみを照射するもので
、また上記偏光板が揺動もしくは回動するために偏光板
の温度上昇が低く押えられ、更にその効果を増すために
は能力の小さい冷却部ファンによる冷却でも光分な効果
を有するものである。According to the above configuration of the present invention, the light irradiated from the light valve by the light source irradiates only a part of the polarizing plate, and since the polarizing plate swings or rotates, the temperature of the polarizing plate increases. In order to further increase the effect, even cooling using a cooling unit fan with a small capacity has a significant effect.
実施例１゜
第１図は本発明におけるライトバルブ式投写表示装置の
斜視図を示す。ランプ１０１から輻射する光束は、集光
リフレクタ１０２で集光され、集光リフレクタの動作長
位置において、高い照度と少ない照度ムラによる照射光
となる。動作長位置には、画像変調素子としてマトリッ
クス型のライトバルブ１０３と一部の偏光板１０４，１
０５とが配置される。上記ライトバルブの入射光側に位
置する偏光板１０４は、尚エネルギー元来の吸収による
偏光板の温度上昇・偏光特性の劣化を防ぐために、駆動
モータ１０６と回転円盤１０７上に取シ付けられる。本
実施例では光源に１５０Ｗのキセノンランプを使用する
。ライトバルブには薄膜トランジスタを用いた液晶パネ
ルを用いる。画像変調部（大きさ３ ｏｎ Ｘ ４副）
には５００〜ＩＷＺ−の元が照射する。固定偏光板構造
においては、光吸収により８０Ｃの温度上昇となる。Embodiment 1 FIG. 1 shows a perspective view of a light valve type projection display device according to the present invention. The light flux radiated from the lamp 101 is collected by the condensing reflector 102, and becomes irradiation light with high illuminance and little illuminance unevenness at the operating length position of the condensing reflector. At the operating length position, a matrix type light valve 103 and some polarizing plates 104 and 1 are installed as image modulating elements.
05 is placed. The polarizing plate 104 located on the incident light side of the light valve is mounted on a drive motor 106 and a rotating disk 107 in order to prevent temperature rise and deterioration of polarization characteristics of the polarizing plate due to energy absorption. In this embodiment, a 150W xenon lamp is used as a light source. The light valve uses a liquid crystal panel using thin film transistors. Image modulation section (size 3 on x 4 sub)
is irradiated by a source of 500 to IWZ-. In the fixed polarizing plate structure, the temperature rises by 80C due to light absorption.
第２図に形状を示す扇型偏光板を１６枚取りつけた外径
１６ｃｔｎの偏光板ｉ１２０ＲＰＭで回転させると、１
Ｍ元板への熱蓄積は分散されかつ回転による冷却効果に
より温度上昇分は３０Ｃ以下に押えられた。この結果環
境温度４０Ｃにおいても偏光板の動作保証温度７０℃以
下を達成することが出来た。また扇型偏光板の回転によ
る光量リップルは高速回転によシ無視できるもので、偏
光軸の角度変動も充分に小さいため表示への影蕃は少な
い。When rotated at 120 RPM with an outer diameter of 16 ctn polarizing plate equipped with 16 fan-shaped polarizing plates whose shape is shown in Fig. 2, 1
Heat accumulation in the M base plate was dispersed, and the temperature increase was suppressed to 30C or less due to the cooling effect of rotation. As a result, even at an environmental temperature of 40C, it was possible to achieve a guaranteed operation temperature of 70C or lower for the polarizing plate. Furthermore, the light amount ripple caused by the rotation of the fan-shaped polarizing plate can be ignored due to the high speed rotation, and the angular fluctuation of the polarization axis is also sufficiently small, so that there is little influence on the display.
一方、ライトバルブを通った元は投写レンズ１０８によ
りスクリーン１０９上に投影結像する。On the other hand, the light that has passed through the light valve is projected and imaged onto a screen 109 by a projection lens 108 .
そのときの最大間るさは、９点法評価により２００ルー
メンのスクリーン元来となる。この値は、通常の室内照
明において観賞できる光分な明るさである。The maximum brightness at that time is the original 200 lumen screen based on the 9-point evaluation method. This value is the brightness that can be seen under normal indoor lighting.
実施例２
第３図には、カラー投写装置の例を示す。光源には、リ
フレクタつきの２５０Ｗメタルハライドランプ２０１を
使用した。色相分離のために、青反射用ダイクロインク
ミラー２０２と赤道過用ダイクロインクミラー２０３と
緑トリミングフィルター２０４と筒反射″４ｆ−鋭２０
５とが設けられ、青緑赤の３枚の画像変調用ライトバル
ブ２０６゜２０７．２０８に青緑赤の各バンドの光束を
導き照射する。前記ダイクロイックミラー及び高反射率
鏡は、内壁にアルミまたは銀の蒸着による高反射面を有
する導光管２０９の中に設置され、導光管入口２１０か
ら入射した光束の閉じ込めが行なわれる。導光管の出口
２１１とライトバルブとの距離は近接する程、ライトバ
ルブを照射する光束の利用効率は高くなる。しかしその
距離が短か・いとライトバルブの前に配置される偏光板
２１２〜２１４は、照射光による温度上昇への対策が難
しくなる。即ち、カラー表示を目的とする本実施例では
、高い色温度（６０００’に以上）による白色を得るた
めには比視感度の低い宵バンドにおいて１ ｗ／ｃ４
の輻射を必要とし、ヨウ素系高偏光度偏光板の短波長
域における吸収率の増大と相俟って、青バンドにおける
偏光板の温度上昇が、緑赤バンドの偏光板に比べて甚し
くなる。透過率４０％、偏光板９９．５％の偏光板では
、その冷却のために１０ ｍ／ｓｅｃの冷却風を必要と
する。環元管出口とライトバルブの間の距離は元の散逸
を押えるために５關以下が望ましい。この間隙で１０−
／ｓｅｃの風速を得るためには静水圧の高い風量５０６
ｉ／Ｈのクマトリモータを必要とし、騒晋が犬ｅ ＜
（５５ｄＢ以上）なυ冷却装置のコストも高くなる欠点
を有していた。このためここではライトバルブのシャッ
タ部の大きさ３０顛×４０關に対して、偏光板の大きさ
’ｚｌｏＯ關Ｘ５０１ｎ冨とし、モータ２２０に係合す
るワイヤー２２１により偏光板をＩＨｚにして上下揺動
する。（詳細を＠４図に示す。）掃引により導光管とラ
イトバルブの小間隙から抜は出た偏光板の一部は、風量
の少ない（１７ＪＩＨ月司軸ファンモータによっても容
易に冷却することが出来、まｆｃｌＯｂＢ以上の騒晋の
低減が出来た。ライトバルブを通過した変調された光束
は、色合成用プリズム２１８によシーつの光束にｆｘ、
ツ”’（投写レンズ２１９によりスクリーン２１６上
に投影さ扛、２５０ルーメンのスクリーン光束が得られ
た。Embodiment 2 FIG. 3 shows an example of a color projection device. A 250W metal halide lamp 201 with a reflector was used as a light source. For hue separation, a dichroic ink mirror 202 for blue reflection, a dichroic ink mirror 203 for equatorial transmission, a green trimming filter 204, and a cylinder reflection "4F-sharp 20" are used.
5 is provided, and the light beams of each band of blue, green, and red are guided and irradiated to three image modulation light valves 206, 207, and 208 of blue, green, and red. The dichroic mirror and the high reflectance mirror are installed in a light guide tube 209 which has a highly reflective surface formed by vapor deposition of aluminum or silver on the inner wall, and confines the light flux incident from the light guide tube entrance 210. The closer the distance between the exit 211 of the light guide tube and the light valve is, the higher the utilization efficiency of the luminous flux that illuminates the light valve becomes. However, if the distance is short, it becomes difficult for the polarizing plates 212 to 214 placed in front of the light valve to take measures against the temperature increase caused by the irradiated light. That is, in this embodiment, which aims at color display, in order to obtain a white color with a high color temperature (over 6000'), 1 w/c4 is required in the evening band where the relative luminous efficiency is low.
radiation, and together with the increase in absorption in the short wavelength range of the iodine-based high-polarization polarizing plate, the temperature rise of the polarizing plate in the blue band becomes more severe than that of the polarizing plate in the green-red band. . A polarizing plate with a transmittance of 40% and a polarizing plate of 99.5% requires cooling air of 10 m/sec to cool it. The distance between the annulus tube outlet and the light valve is preferably 5 degrees or less in order to suppress the original dissipation. In this gap 10-
In order to obtain a wind speed of /sec, the air volume with high hydrostatic pressure is 506
I/H's bear trimmer motor is required, and the noise is like a dog.
(55 dB or more), the cost of the υ cooling device also increases. For this reason, here, the size of the polarizing plate is set to 501nm for the size of the shutter section of the light valve, which is 30mm x 40mm, and the polarizing plate is set to IHz and vertically oscillated by a wire 221 that engages with a motor 220. move. (Details are shown in Figure 4.) The part of the polarizing plate that was pulled out from the small gap between the light guide tube and the light bulb by sweeping has a small air volume (it can also be easily cooled by the 17JIH Tsukiji shaft fan motor). , and the noise was reduced more than fclObB.The modulated light flux that passed through the light valve is divided into two light fluxes by the color synthesis prism 218, fx,
(The light was projected onto the screen 216 by the projection lens 219, and a screen luminous flux of 250 lumens was obtained.
以上述べたように本発明によれば、偏光板の揺動・回動
により偏光板に照射する高輝度照射光によるエネルギー
の蓄積（熱エネルギー）を押え、簡便な冷却手段によシ
低騒晋・低価格を実現するものである。本発明では、単
板ライトバルブによる投写方式、三板ライトバルブと導
光管によるカラー投写方式の例を説明したが、任意のラ
イトバルブの数による投写方式及び導光管を使わない先
妻系（リレーレンズ伝達方式など）にも適用できるもの
である。またライトバルブとしては液晶ライトバルブ以
外にもＰＬＺＴや強誘電導膜などの偏光光学系による変
調素子を応用するもので、透過型のみならず反射型ライ
トバルブにも適する。As described above, according to the present invention, the accumulation of energy (thermal energy) due to the high-intensity irradiation light irradiated to the polarizing plate is suppressed by swinging and rotating the polarizing plate, and the simple cooling means can be used to reduce noise.・Achieves low prices. In the present invention, examples of a projection method using a single plate light valve and a color projection method using a three-plate light valve and a light guide tube have been explained. It can also be applied to lens transmission systems, etc.). In addition to the liquid crystal light valve, the light valve may be a modulation element using a polarization optical system such as PLZT or a ferroelectric film, and is suitable not only for a transmission type but also for a reflection type light valve.
本発明は通常の室内照明において明るくかつ見易い表示
を行なう投写装置を実現するものである。The present invention realizes a projection device that provides a bright and easy-to-see display under normal indoor lighting.
第１図は、本発明による単板方式のライトバルブ投写表
示装置を示す斜視図
第２図は、実施例１における回転円盤及び偏光板を示す
平面図
第３図は、本発明によるカラー投写装置を示す斜視図
第４図は、従来のカラー投写装置を示す側面図。
以上
出願人 セイコーエプンン株式会社
代理人 弁理士 最 上 務
他１名
第１図
第２図
第３図FIG. 1 is a perspective view showing a single-plate type light valve projection display device according to the present invention. FIG. 2 is a plan view showing a rotating disk and a polarizing plate in Embodiment 1. FIG. 3 is a color projection device according to the present invention. FIG. 4 is a side view showing a conventional color projection device. Applicant: Seiko Epunun Co., Ltd. Agent, Patent Attorney Tsutomu Mogami and 1 other person Figure 1 Figure 2 Figure 3
Claims (1)
え、上記ライトバルブは偏光板を有する光変調素子から
なり、上記偏光板を揺動もしくは回動する手段を有する
ことを特徴とするライトバルブ式投写表示装置。(1) Light valve type projection comprising at least a light source, a light valve, and a projection lens, the light valve comprising a light modulation element having a polarizing plate, and having means for swinging or rotating the polarizing plate. Display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP88388A JPH01183037A (en) | 1988-01-06 | 1988-01-06 | Light bulb type projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP88388A JPH01183037A (en) | 1988-01-06 | 1988-01-06 | Light bulb type projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01183037A true JPH01183037A (en) | 1989-07-20 |
Family
ID=11486070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP88388A Pending JPH01183037A (en) | 1988-01-06 | 1988-01-06 | Light bulb type projection display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01183037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617226A (en) * | 1993-12-17 | 1997-04-01 | Matsushita Electric Industrial Co., Ltd. | Polymer dispersed liquid crystal projection display having polarizing means |
-
1988
- 1988-01-06 JP JP88388A patent/JPH01183037A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617226A (en) * | 1993-12-17 | 1997-04-01 | Matsushita Electric Industrial Co., Ltd. | Polymer dispersed liquid crystal projection display having polarizing means |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6467910B1 (en) | Image projector | |
| JP5429079B2 (en) | Light source device and projection display device | |
| US6582083B2 (en) | Display device and display optical system unit | |
| US6854851B2 (en) | Projection display | |
| WO2011118536A1 (en) | Projection image display device and light source device | |
| US20050122724A1 (en) | Projector light source and projection type image display device using the same | |
| JP3008086B2 (en) | Projection display device | |
| US20210003912A1 (en) | Light source system and projection display apparatus | |
| JP7113318B2 (en) | Light source device and projection type image display device | |
| JP3350003B2 (en) | Light source device for projector | |
| JP2020071307A (en) | Lighting apparatus and projection type video display device | |
| JP2002189252A (en) | Optical unit and video display device using the same | |
| JP2001004931A (en) | Video projecting device | |
| CN108681198B (en) | Light source device and projection display device | |
| JPH01183037A (en) | Light bulb type projection display device | |
| US10996457B2 (en) | Wheel apparatus, light source apparatus, and projection-type image display apparatus | |
| WO2021249202A1 (en) | Light source structure and projection device | |
| JP2956646B2 (en) | projector | |
| CN100526972C (en) | Projecting display with invisible light reflecting plate for dispersing heat energy | |
| JP2549949Y2 (en) | Reflector | |
| JP2907184B2 (en) | projector | |
| JP2982737B2 (en) | projector | |
| CN116320342A (en) | Single-chip LCD illumination projection structure and using method thereof | |
| JP2002122938A (en) | Projector device | |
| JP2907183B2 (en) | projector |