JPH05225806A - Display lighting system - Google Patents
Display lighting systemInfo
- Publication number
- JPH05225806A JPH05225806A JP2354592A JP2354592A JPH05225806A JP H05225806 A JPH05225806 A JP H05225806A JP 2354592 A JP2354592 A JP 2354592A JP 2354592 A JP2354592 A JP 2354592A JP H05225806 A JPH05225806 A JP H05225806A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent lamp
- display
- indoor
- polarizing plate
- polarization
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、室内照明中でコントラ
ストの良好な画像を観ることができる表示照明装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display illuminator capable of viewing an image with good contrast in room illumination.
【０００２】[0002]
【従来の技術】従来の装置は、例えば特開昭６２−８２
６０１号公報に記載のように、表示装置の前面および室
内照明手段のそれぞれに直線偏光フィルタである偏光板
を設け、各偏光板の偏光軸を直角にすることにより、照
返りのない表示を可能とするものが提案されている。2. Description of the Related Art A conventional device is disclosed in, for example, Japanese Patent Laid-Open No. 62-82.
As described in Japanese Patent No. 601, by providing a polarizing plate, which is a linear polarization filter, on each of the front surface of the display device and the indoor lighting means, and making the polarization axis of each polarizing plate at a right angle, it is possible to display without reflection. Is proposed.
【０００３】[0003]
【発明が解決しようとする課題】この従来の装置におい
て、室内照明中でコントラストの良好な画像を観るため
には、室内照明手段に取り付ける偏光板の偏光軸と表示
装置に取り付ける偏光板の偏光軸とを正確に直角に合わ
せる必要がある。ここで、偏光軸とは透過軸あるいは吸
収軸のいずれかを示すこととする。偏光軸を最適に合わ
せるためには室内照明手段を表示装置の正面に配置しな
ければならないが、実際には室内構成の都合などによ
り、そのように配置できるとは限らない。In this conventional device, in order to view an image with good contrast in room illumination, the polarization axis of the polarizing plate attached to the room illumination means and the polarization axis of the polarizing plate attached to the display device. And must be aligned at exactly the right angle. Here, the polarization axis indicates either the transmission axis or the absorption axis. In order to optimally align the polarization axes, the indoor illumination means must be arranged in front of the display device, but in reality, such arrangement may not always be possible due to the indoor configuration and the like.
【０００４】以下、図面を参照して室内照明手段が表示
装置に対して斜め方向に配置された場合に発生する課題
について詳細に説明する。The problem that occurs when the indoor lighting means is arranged diagonally to the display device will be described in detail below with reference to the drawings.
【０００５】図５は従来の表示照明装置５０の斜視図で
ある。表示照明装置５０は、表示装置である液晶プロジ
ェクタ１およびスクリーン２、室内照明手段である蛍光
灯３よりなる室内構成である。一般に、スクリーン２は
部屋の壁面に設けられ、蛍光灯３は部屋の天井に設けら
れる。液晶プロジェクタ１は、垂直偏光４の映像光５を
スクリーン２上に投写する。スクリーン２には、その前
面に垂直方向の偏光軸６を有する直線偏光板７が設けて
ある。蛍光灯３には、スクリーン２に取り付けた偏光板
７の偏光軸６に対して直角の偏光軸８を有する直線偏光
板９が設けてある。FIG. 5 is a perspective view of a conventional display illumination device 50. The display illumination device 50 has an indoor configuration including a liquid crystal projector 1 and a screen 2 which are display devices, and a fluorescent lamp 3 which is indoor illumination means. Generally, the screen 2 is provided on the wall surface of the room, and the fluorescent lamp 3 is provided on the ceiling of the room. The liquid crystal projector 1 projects the image light 5 of the vertically polarized light 4 on the screen 2. The screen 2 is provided on its front surface with a linear polarization plate 7 having a vertical polarization axis 6. The fluorescent lamp 3 is provided with a linear polarization plate 9 having a polarization axis 8 perpendicular to the polarization axis 6 of the polarization plate 7 attached to the screen 2.
【０００６】図５のように複数の蛍光灯３を設けた室内
では、スクリーン２に対して斜め方向に配置される蛍光
灯３が存在する。この場合、蛍光灯３に取り付ける偏光
板の偏光軸８とスクリーン２に取り付ける偏光板７の偏
光軸６とを正確に直角に合わせたつもりでも、スクリー
ン２に対して斜め方向に配置された蛍光灯３からスクリ
ーン２に照射される照明光１０の偏光方向１１は回転し
てしまい、この照明光１０の偏光方向１１とスクリーン
２に取り付けた偏光板７の偏光軸６とが直角からずれる
ため、十分なコントラスト向上効果が得られないという
点については配慮されていなかった。In a room provided with a plurality of fluorescent lamps 3 as shown in FIG. 5, there are fluorescent lamps 3 arranged obliquely with respect to the screen 2. In this case, even if it is intended that the polarization axis 8 of the polarizing plate attached to the fluorescent lamp 3 and the polarization axis 6 of the polarizing plate 7 attached to the screen 2 are aligned at right angles, the fluorescent lamp arranged obliquely with respect to the screen 2. Since the polarization direction 11 of the illumination light 10 radiated to the screen 2 from 3 is rotated and the polarization direction 11 of the illumination light 10 and the polarization axis 6 of the polarizing plate 7 attached to the screen 2 are deviated from a right angle, it is sufficient. No consideration was given to the fact that a significant contrast improvement effect cannot be obtained.
【０００７】そこで本発明の目的は、室内照明手段と表
示装置との相対位置によらず、常に室内照明中でコント
ラストの良好な映像を見ることができる表示照明装置を
提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a display illuminating device which can always see a good contrast image in the room illuminating, regardless of the relative position of the indoor illuminating means and the display device.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、表示装置の前面に偏光軸が垂直方向の
直線偏光フィルタを設け、室内照明手段に偏光軸が表示
装置の前面と室内照明手段とを結ぶ直線に対して直角方
向の直線偏光フィルタを設けることにした。In order to achieve the above object, in the present invention, a linear polarization filter having a vertical polarization axis is provided on the front surface of the display device, and the indoor illumination means has the polarization axis on the front surface of the display device. It was decided to provide a linear polarization filter in a direction perpendicular to the line connecting the interior lighting means.
【０００９】また、上記目的を達成するために、本発明
では、表示装置の前面に左右いずれかの旋回方向の円偏
光フィルタを設け、室内照明手段に上記円偏光フィルタ
と異なる旋回方向の円偏光フィルタを設けることにし
た。In order to achieve the above object, according to the present invention, a circular polarization filter having a right or left rotation direction is provided on the front surface of the display device, and the indoor illumination means has a circular polarization filter having a different rotation direction from the circular polarization filter. I decided to install a filter.
【００１０】[0010]
【作用】室内照明手段に設ける偏光フィルタの偏光軸
を、室内照明手段と表示装置との相対位置に対応して予
め回転して設けることにより、室内照明手段の照明光の
偏光方向と表示装置の偏光板の偏光軸を直角に構成でき
るので、室内照明中で常に照返りのない表示が可能にな
り、コントラストの良好な映像を見ることができる。The polarization axis of the polarizing filter provided in the room lighting means is pre-rotated so as to correspond to the relative position between the room lighting means and the display device, so that the polarization direction of the illumination light of the room lighting means and the display device. Since the polarization axis of the polarizing plate can be configured at right angles, it is possible to always display without reflection in indoor lighting, and it is possible to see an image with good contrast.
【００１１】また、円偏光フィルタを用いることによ
り、室内照明手段と表示装置との相対位置がずれても偏
光軸がずれることがないため、室内照明中で常に照返り
のない表示が可能になり、コントラストの良好な映像を
見ることができる。Further, by using the circularly polarized light filter, the polarization axis does not shift even if the relative position between the room illumination means and the display device is deviated, so that it is possible to always perform display without reflection during room illumination. , You can see images with good contrast.
【００１２】[0012]
【実施例】以下、図面を用いて本発明の実施例を詳細に
説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【００１３】図１は、本発明の表示照明装置５１の斜視
図である。本実施例では、蛍光灯３には、偏光軸１２が
スクリーン２と蛍光灯３とを結ぶ直線１０（前記した蛍
光灯３からスクリーン２に照射される照明光と同じ）に
対して直角方向の直線偏光板１３を設けた点が図３と異
なり、その他の構成は図３と同じである。FIG. 1 is a perspective view of a display lighting device 51 of the present invention. In this embodiment, the fluorescent lamp 3 has a polarization axis 12 perpendicular to the straight line 10 connecting the screen 2 and the fluorescent lamp 3 (the same as the illumination light emitted from the fluorescent lamp 3 to the screen 2). 3 is different in that a linear polarizing plate 13 is provided, and other configurations are the same as those in FIG.
【００１４】本実施例によれば、蛍光灯３に設ける偏光
板１３の偏光軸１２を、蛍光灯３とスクリーン２との相
対位置に対応して予め回転して設けることにより、蛍光
灯３の照明光１０の偏光方向１４とスクリーン２の偏光
板７の偏光軸６を直角に構成できるので、室内照明中で
常に照返りのない表示が可能になり、コントラストの良
好な映像を見ることができる。According to the present embodiment, the polarization axis 12 of the polarizing plate 13 provided on the fluorescent lamp 3 is rotated in advance in correspondence with the relative position between the fluorescent lamp 3 and the screen 2, so that the fluorescent lamp 3 is provided. Since the polarization direction 14 of the illuminating light 10 and the polarization axis 6 of the polarizing plate 7 of the screen 2 can be configured at right angles, it is possible to always display without reflection in the room illumination and to see an image with good contrast. ..
【００１５】尚、本実施例では直線偏光板１３の形状は
長方形であり、偏光軸１２が所定の方向になるように加
工して使用したが、これに限るものではない。In this embodiment, the linear polarizing plate 13 has a rectangular shape and is processed so that the polarization axis 12 is in a predetermined direction. However, the present invention is not limited to this.
【００１６】例えば、図２に示すように、直線偏光板１
３の形状を円形とし、蛍光灯３に対して直線偏光板１３
を回転自在に構成しても良い。本実施例によれば、偏光
軸１２の回転調整が可能なので、偏光軸１２が所定の方
向になるように予め加工する必要がない。For example, as shown in FIG. 2, the linear polarizing plate 1
3 has a circular shape, and a linear polarization plate 13 is provided for the fluorescent lamp 3.
May be configured to be rotatable. According to this embodiment, since the rotation of the polarization axis 12 can be adjusted, it is not necessary to process the polarization axis 12 in a predetermined direction in advance.
【００１７】尚、本実施例では蛍光灯３に直線偏光板１
３を設けたが、これに限るものではない。In this embodiment, the fluorescent lamp 3 and the linear polarizing plate 1 are used.
Although No. 3 is provided, it is not limited to this.
【００１８】図３は、本発明の表示照明装置５２の斜視
図である。本実施例では、液晶プロジェクタ１の前面に
１／４波長板１５を設けた。この１／４波長板１５の作
用により右回り円偏光１６の映像光１７をスクリーン２
上に投写する。スクリーン２には、その前面に右回り円
偏光１８を透過する右回り円偏光板１９が設けてある。
蛍光灯３には、左回り円偏光２０を透過する左回り円偏
光板２１が設けてある。蛍光灯３と同じ室内照明手段で
ある窓２２にも、左回り円偏光２３を透過する左回り円
偏光板２４が設けてある。FIG. 3 is a perspective view of the display lighting device 52 of the present invention. In this embodiment, the quarter-wave plate 15 is provided on the front surface of the liquid crystal projector 1. By the action of the quarter wavelength plate 15, the image light 17 of the clockwise circularly polarized light 16 is displayed on the screen 2.
Project on top. The screen 2 is provided with a clockwise circularly polarizing plate 19 which transmits the clockwise circularly polarized light 18 on the front surface thereof.
The fluorescent lamp 3 is provided with a counterclockwise circularly polarizing plate 21 that transmits the counterclockwise circularly polarized light 20. A counterclockwise circularly polarizing plate 24 that transmits a counterclockwise circularly polarized light 23 is also provided in the window 22 which is the same indoor illumination means as the fluorescent lamp 3.
【００１９】本実施例によれば、円偏光板１９，２１，
２４を用いることにより、蛍光灯３や窓２２とスクリー
ン２との相対位置がずれても偏光軸がずれることがない
ため、室内照明中で常に照返りのない表示が可能にな
り、コントラストの良好な映像を見ることができる。特
に、円偏光板を用いる本実施例では、直線偏光板を用い
る前記実施例と異なり、複数の表示装置がある場合にも
対応できる。According to this embodiment, the circularly polarizing plates 19, 21,
By using 24, since the polarization axis does not shift even if the relative position of the fluorescent lamp 3 or the window 22 and the screen 2 is displaced, it is possible to always display without reflection in the room illumination and to obtain a good contrast. You can see the video. Particularly, in the present embodiment using the circularly polarizing plate, unlike the above-mentioned embodiment using the linearly polarizing plate, it is possible to deal with the case where there are a plurality of display devices.
【００２０】尚、本実施例では蛍光灯３の全面にわたっ
て左回り円偏光板２１を取り付けたが、これに限るもの
ではない。In this embodiment, the counterclockwise circularly polarizing plate 21 is attached over the entire surface of the fluorescent lamp 3, but the present invention is not limited to this.
【００２１】図４は、本発明の表示照明装置５２の蛍光
灯３の側面図である。本実施例では、円形の蛍光灯３を
使用し、左回り円偏光板２１を蛍光灯３の周囲のみに取
付けた。これにより、スクリーン２を照明する光は左回
り円偏光板２１を透過して左回り円偏光となるが、蛍光
灯３の真下を照明する光は左回り円偏光板２１を透過せ
ず、無偏光のままである。一般に、偏光板の透過率は４
０％程度であるため、前記実施例のように蛍光灯３の全
面にわたって左回り円偏光板２１を取り付けた場合に
は、部屋全体が４０％の明るさになってしまうが、本実
施例では部屋の真下を照明する光についてはあまり暗く
ならないという効果がある。FIG. 4 is a side view of the fluorescent lamp 3 of the display lighting device 52 of the present invention. In this embodiment, the circular fluorescent lamp 3 is used, and the counterclockwise circularly polarizing plate 21 is attached only around the fluorescent lamp 3. As a result, the light that illuminates the screen 2 passes through the counterclockwise circularly polarizing plate 21 to become counterclockwise circularly polarized light, but the light that illuminates directly below the fluorescent lamp 3 does not pass through the counterclockwise circularly polarizing plate 21, and is It remains polarized. Generally, the transmittance of a polarizing plate is 4
Since it is about 0%, when the counterclockwise circularly polarizing plate 21 is attached over the entire surface of the fluorescent lamp 3 as in the above-described embodiment, the entire room has a brightness of 40%, but in the present embodiment, There is an effect that the light that illuminates just below the room does not become too dark.
【００２２】[0022]
【発明の効果】以上説明したように、本発明では、表示
装置の前面に偏光軸が垂直方向の直線偏光フィルタを設
け、蛍光灯や窓等の室内照明手段に偏光軸が表示装置の
前面と室内照明手段とを結ぶ直線に対して直角方向の直
線偏光フィルタを設けた。これにより、室内照明手段に
設ける偏光フィルタの偏光軸を、室内照明手段と表示装
置との相対位置に対応して予め回転して設けることにな
り、室内照明手段の照明光の偏光方向と表示装置の偏光
板の偏光軸を直角に構成できるので、室内照明中で常に
照返りのない表示が可能になり、コントラストの良好な
映像を見ることができるといった効果がある。As described above, according to the present invention, a linear polarization filter having a vertical polarization axis is provided on the front surface of a display device, and indoor polarization means such as a fluorescent lamp or a window has a polarization axis on the front surface of the display device. A linear polarization filter perpendicular to the straight line connecting the interior lighting means was provided. As a result, the polarization axis of the polarization filter provided in the indoor lighting means is rotated in advance corresponding to the relative position between the indoor lighting means and the display device, and the polarization direction of the illumination light of the indoor lighting means and the display device. Since the polarization axis of the polarizing plate can be configured at a right angle, there is an effect that it is possible to always display without reflection in room lighting and to see an image with good contrast.
【００２３】また、本発明では、表示装置の前面に左右
いずれかの旋回方向の円偏光フィルタを設け、蛍光灯や
窓等の室内照明手段に上記円偏光フィルタと異なる旋回
方向の円偏光フィルタを設けることにより、室内照明手
段と表示装置との相対位置がずれても円偏光なので偏光
軸がずれることがないため、室内照明中で常に照返りの
ない表示が可能になり、コントラストの良好な映像を見
ることができるといった効果がある。Further, according to the present invention, a circular polarization filter having a right or left turning direction is provided on the front surface of the display device, and a circular polarization filter having a different turning direction from the above circular polarization filter is provided for indoor lighting means such as a fluorescent lamp or a window. By providing it, since the polarization axis does not shift because it is circularly polarized light even if the relative position between the indoor lighting means and the display device is shifted, it is possible to display without reflection during indoor lighting, and images with good contrast can be obtained. There is an effect that you can see.
【図１】本発明の表示照明装置５１の斜視図である。FIG. 1 is a perspective view of a display lighting device 51 of the present invention.
【図２】本発明の表示照明装置５１の蛍光灯３の底面図
である。FIG. 2 is a bottom view of the fluorescent lamp 3 of the display lighting device 51 of the present invention.
【図３】本発明の表示照明装置５２の斜視図である。FIG. 3 is a perspective view of a display lighting device 52 of the present invention.
【図４】本発明の表示照明装置５２の蛍光灯３の側面図
である。FIG. 4 is a side view of the fluorescent lamp 3 of the display lighting device 52 of the present invention.
【図５】従来の表示照明装置５０の斜視図である。FIG. 5 is a perspective view of a conventional display illumination device 50.
１…液晶プロジェクタ、２…スクリーン、３…蛍光灯、
４…垂直偏光、５…映像光、６…偏光軸、７…直線偏光
板、８…偏光軸、９…直線偏光板、１０…照明光、１１
…偏光方向、１２…偏光軸、１３…直線偏光板、１４…
偏光方向、１５…１／４波長板、１６…右回り円偏光、
１７…映像光、１８…右回り円偏光、１９…スクリー
ン、２０…左回り円偏光、２１…左回り円偏光板、２２
…窓、２３…左回り円偏光、２４…左回り円偏光板、５
０…表示照明装置、５１…表示照明装置、５２…表示照
明装置。1 ... Liquid crystal projector, 2 ... Screen, 3 ... Fluorescent lamp,
4 ... Vertically polarized light, 5 ... Image light, 6 ... Polarization axis, 7 ... Linear polarization plate, 8 ... Polarization axis, 9 ... Linear polarization plate, 10 ... Illumination light, 11
... polarization direction, 12 ... polarization axis, 13 ... linearly polarizing plate, 14 ...
Polarization direction, 15 ... Quarter wave plate, 16 ... Right-hand circularly polarized light,
17 ... Image light, 18 ... Right-handed circularly polarized light, 19 ... Screen, 20 ... Left-handed circularly polarized light, 21 ... Left-handed circularly polarizing plate, 22
... window, 23 ... counterclockwise circularly polarized light, 24 ... counterclockwise circularly polarized plate, 5
0 ... Display lighting device, 51 ... Display lighting device, 52 ... Display lighting device.
Claims (4)
偏光フィルタを設け、蛍光灯や窓等の室内照明手段に、
偏光軸が表示装置の前面と室内照明手段とを結ぶ直線に
対して直角方向の直線偏光フィルタを設けたことを特徴
とする表示照明装置。1. A linear polarization filter having a polarization axis in the vertical direction is provided on the front surface of a display device to provide indoor lighting means such as a fluorescent lamp or a window.
A display illumination device, characterized in that a linear polarization filter having a polarization axis perpendicular to a line connecting the front surface of the display device and the indoor illumination means is provided.
の円偏光フィルタを設け、蛍光灯や窓等の室内照明手段
に、上記円偏光フィルタと異なる旋回方向の円偏光フィ
ルタを設けたことを特徴とする表示照明装置。2. A circular polarization filter having a right or left swivel direction is provided on the front surface of the display device, and a circular polarization filter having a different swivel direction from the circular polarization filter is provided for indoor lighting means such as a fluorescent lamp or a window. Display lighting device characterized by.
形状を円形とし、室内照明手段に対して直線偏光フィル
タを回転自在に構成したことを特徴とする請求項１記載
の表示照明装置。3. The display lighting device according to claim 1, wherein the linearly polarized light filter provided in the indoor lighting means has a circular shape, and the linearly polarized light filter is rotatable with respect to the indoor lighting means.
ィルタを透過しない形状に偏光フィルタを構成したこと
を特徴とする請求項１または請求項２記載の表示照明装
置。4. A display illumination device according to claim 1, wherein the light illuminating directly under the indoor illumination means is configured such that the light does not pass through the polarization filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2354592A JPH05225806A (en) | 1992-02-10 | 1992-02-10 | Display lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2354592A JPH05225806A (en) | 1992-02-10 | 1992-02-10 | Display lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05225806A true JPH05225806A (en) | 1993-09-03 |
Family
ID=12113449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2354592A Pending JPH05225806A (en) | 1992-02-10 | 1992-02-10 | Display lighting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05225806A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007138787A1 (en) * | 2006-05-26 | 2007-12-06 | Nitto Denko Corporation | Appreciating room for liquid crystal display device, and method for appreciating liquid crystal display device |
| WO2009139261A1 (en) * | 2008-05-15 | 2009-11-19 | 日東電工株式会社 | Video image appreciation system |
| JP2010262145A (en) * | 2009-05-08 | 2010-11-18 | Nitto Denko Corp | Video viewing facility |
| US11500280B2 (en) | 2018-02-27 | 2022-11-15 | Steelcase Inc. | Multiple-polarization cloaking for projected and writing surface view screens |
-
1992
- 1992-02-10 JP JP2354592A patent/JPH05225806A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007138787A1 (en) * | 2006-05-26 | 2007-12-06 | Nitto Denko Corporation | Appreciating room for liquid crystal display device, and method for appreciating liquid crystal display device |
| EP2023192A1 (en) * | 2006-05-26 | 2009-02-11 | Nitto Denko Corporation | Appreciating room for liquid crystal display device, and method for appreciating liquid crystal display device |
| US7889283B2 (en) | 2006-05-26 | 2011-02-15 | Nitto Denko Corporation | Liquid crystal display device appreciating room |
| EP2023192A4 (en) * | 2006-05-26 | 2012-03-07 | Nitto Denko Corp | Appreciating room for liquid crystal display device, and method for appreciating liquid crystal display device |
| WO2009139261A1 (en) * | 2008-05-15 | 2009-11-19 | 日東電工株式会社 | Video image appreciation system |
| JP2009276574A (en) * | 2008-05-15 | 2009-11-26 | Nitto Denko Corp | Video viewing facility |
| JP2010262145A (en) * | 2009-05-08 | 2010-11-18 | Nitto Denko Corp | Video viewing facility |
| US8451537B2 (en) | 2009-05-08 | 2013-05-28 | Nitto Denko Corporation | Video viewing facility and self-luminous display |
| US11500280B2 (en) | 2018-02-27 | 2022-11-15 | Steelcase Inc. | Multiple-polarization cloaking for projected and writing surface view screens |
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