JPH0634140B2 - Illumination light reflection prevention mechanism in light emitting display - Google Patents
Illumination light reflection prevention mechanism in light emitting displayInfo
- Publication number
- JPH0634140B2 JPH0634140B2 JP11563390A JP11563390A JPH0634140B2 JP H0634140 B2 JPH0634140 B2 JP H0634140B2 JP 11563390 A JP11563390 A JP 11563390A JP 11563390 A JP11563390 A JP 11563390A JP H0634140 B2 JPH0634140 B2 JP H0634140B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting display
- light emitting
- display
- illumination
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はＣＲＴ等の発光式表示器に於ける照明光反射防
止機構に関するものである。TECHNICAL FIELD The present invention relates to an illumination light reflection preventing mechanism in a light emitting display such as a CRT.
（従来の技術） ＣＲＴ等の発光式表示器の表示面に照明用光源の反射像
が写って、所定の表示情報が見え難くくなるのを防止す
るために、従来例えば第３図の（ａ）に示すように、ル
ーバ照明等、照明用光源ａ側に遮光板ｂを設けて表示器
ｃの表示面への入射を防いだり、（ｂ）に示すように照
明用光源ａの位置を表示器ｃの表示面に合わせて設定し
て、反射光が操作者の目に入らないようにしたり、ある
いは（ｃ）に示すように表示器ｃの表示面の前面にフー
ドｄを設けて照明光の入射を防止したりしている。(Prior Art) In order to prevent a reflected image of an illuminating light source from being reflected on a display surface of a light emitting display such as a CRT so that it is difficult to view predetermined display information, for example, in FIG. ), A light-shielding plate b is provided on the side of the light source a for illumination such as louver illumination to prevent the light from entering the display surface of the display c, and the position of the light source a for illumination is displayed as shown in (b). It is set according to the display surface of the display c so that the reflected light does not enter the eyes of the operator, or as shown in (c), a hood d is provided on the front surface of the display c to provide illumination light. To prevent the incidence of light.
（発明が解決しようとする課題） 照明用光源側に遮光板を設ける等の方法では、照明設備
に多大なる費用が掛かり、また照明用光源の位置を表示
器に合わせて設定する方法では、その他の個所の照明に
支障を来し、不自然な照明になり易い。そして表示器の
表示面の前面にフードを設ける方法では、所定の表示情
報が見にくくなる。またこれらのいずれの方法を採用し
た場合にも、完全な反射防止を行うことは困難である。(Problems to be Solved by the Invention) A method such as providing a light-shielding plate on the side of a light source for illumination requires a great deal of cost for lighting equipment, and a method of setting the position of the light source for illumination according to the display is It is difficult to illuminate the parts of the room and it becomes unnatural. Then, in the method of providing the hood on the front surface of the display surface of the display device, it becomes difficult to view predetermined display information. Further, even when any of these methods is adopted, it is difficult to completely prevent reflection.
本発明は以上の課題を解決することを目的とするもので
ある。The present invention is intended to solve the above problems.
（課題を解決するための手段） 上述の課題を解決するための手段を、その基本概念を表
した第１図を参照して説明すると、本発明の発光式表示
器に於ける照明光反射防止機構は、照明用光源１と発光
式表示器２間に於いて、照明用光源１側に、前記発光式
表示器２方向の光をＰ偏光とするように第一の偏光フィ
ルター３を設置すると共に、発光式表示器２の表示面４
の前面側に、偏光方向を前記第一の偏光フィルター３の
偏光方向と直交させると共に、該第一の偏光フィルター
３を通ったＰ偏光の入射角がブルースター角となるよう
に第二の偏光フィルター５を設置したものである。(Means for Solving the Problems) The means for solving the above problems will be described with reference to FIG. 1 showing the basic concept thereof. Prevention of illumination light reflection in the light emitting display of the present invention The mechanism installs a first polarizing filter 3 between the light source 1 for illumination and the light emitting display 2 on the light source 1 side for illumination so that the light in the direction of the light emitting display 2 is P-polarized. Together with the display surface 4 of the light emitting display 2.
On the front side of the first polarization filter 3 and the polarization direction of the first polarization filter 3 is orthogonal to the second polarization so that the incident angle of P-polarized light passing through the first polarization filter 3 becomes Brewster's angle. The filter 5 is installed.
（作用） 上記の構成に於いて、照明用光源１から出た光６ａ、す
なわち自然光は第一の偏光フィルター３を通過して直線
偏光となるが、室内の照明光としては差し支えない。し
かして、照明用光源１からの光は、発光式表示器２方向
にはＰ偏光６ｂとなり第二の偏光フィルター５に入射す
る。第二の偏光フィルター５は、該Ｐ偏光６ｂの入射角
θがブルースター角となるように設置しているので、該
第二の偏光フィルター５の表面での反射はない。こうし
て第二の偏光フィルター５にＰ偏光６ｂが入射すると、
該第二の偏光フィルター５は、図示の矢印ａで示す偏光
方向を前記第一の偏光フィルター３の偏光方向（矢印
ｂ）と直交させているので、前記Ｐ偏光６ｂは、この第
二の偏光フィルター５で吸収され、表示器２の表示面４
には到達しない。従ってこの表示面４で反射するという
こともない。(Operation) In the above configuration, the light 6a emitted from the illumination light source 1, that is, natural light, passes through the first polarization filter 3 and becomes linearly polarized light, but it may be used as indoor illumination light. Then, the light from the illumination light source 1 becomes P-polarized light 6b in the direction of the light emitting display 2 and enters the second polarization filter 5. Since the second polarization filter 5 is installed so that the incident angle θ of the P-polarized light 6b becomes the Brewster's angle, there is no reflection on the surface of the second polarization filter 5. Thus, when the P-polarized light 6b is incident on the second polarizing filter 5,
Since the second polarization filter 5 makes the polarization direction shown by the arrow a in the drawing orthogonal to the polarization direction of the first polarization filter 3 (arrow b), the P-polarization 6b is the second polarization filter. The display surface 4 of the display 2 is absorbed by the filter 5.
Does not reach. Therefore, it is not reflected on the display surface 4.
一方、表示面４に情報を表示している光７ａは自然光で
あるから、第二の偏光フィルター５を通過して、その前
面８側で直線偏光７ｂとなる。従って操作者は、この直
線偏光７ｂにより、表示面４からの照明用光源１の反射
なしに、第二の偏光フィルター５の前面８側から表示面
４の表示情報を得ることができる。On the other hand, since the light 7a displaying information on the display surface 4 is natural light, it passes through the second polarization filter 5 and becomes linearly polarized light 7b on the front surface 8 side thereof. Therefore, the operator can obtain the display information of the display surface 4 from the front surface 8 side of the second polarization filter 5 without the reflection of the illumination light source 1 from the display surface 4 by the linearly polarized light 7b.
（実施例） 次に本発明の実施例を図について説明する。(Example) Next, the Example of this invention is described about figures.
符号１は室内の天井９に設置した照明用光源を示すもの
で、この照明用光源１の下側に第一の偏光フィルター３
を設置している。この第一の偏光フィルター３は、後記
発光式表示器２方向の光をＰ偏光６ｂとするように設置
する。照明用光源１の構成、そしてそれに対応する第一
の偏光フィルター３の設置方法は前述した条件を満たす
限りは適宜である。この照明用光源１としては、外光を
含むものであり、この場合には第一の偏光フィルター３
は採光窓に設置すれば良い。Reference numeral 1 denotes an illuminating light source installed on the ceiling 9 in the room. Below the illuminating light source 1, the first polarization filter 3 is provided.
Has been installed. The first polarization filter 3 is installed so that the light in the direction of the light-emitting display 2 described later is P-polarized light 6b. The configuration of the illumination light source 1 and the installation method of the first polarizing filter 3 corresponding thereto are appropriate as long as the above-described conditions are satisfied. The illumination light source 1 contains external light, and in this case, the first polarization filter 3
Can be installed in the daylighting window.
符号２は発光式表示器であり、この発光式表示器２は、
コンピュータや制御機器の端末としてのＣＲＴ等の表示
器２とする他、家庭等に於けるテレビジョンも含むもの
である。Reference numeral 2 is a light emitting display, and the light emitting display 2 is
In addition to the display 2 such as a CRT as a terminal of a computer or a control device, it also includes a television at home.
しかして、この発光式表示器２の表示面４の前面側に第
二の偏光フィルター５を設置する。第二の偏光フィルタ
ー５は、その偏光方向（矢印ａ）を第一の偏光フィルタ
ー３の偏光方向（矢印ｂ）と直交させると共に、前記第
一の偏光フィルター３を通ったＰ偏光６ｂの入射角θが
ブルースター角となるように設置する。従ってこの第二
の偏光フィルター５は、その屈折率に応じて、前記所定
の角度となるように発光式表示器２の表示面４の前面側
に設置する。かかる際、第二の偏光フィルター５は、適
宜の角度調節機構により設置角度を調節可能とすれば、
対象とする照明用光源１に対しての、所定の角度に於け
る設置が容易である。Then, the second polarizing filter 5 is installed on the front side of the display surface 4 of the light emitting display 2. The second polarization filter 5 makes its polarization direction (arrow a) orthogonal to the polarization direction of the first polarization filter 3 (arrow b), and makes the incident angle of the P-polarized light 6b passing through the first polarization filter 3 above. Install so that θ is Brewster's angle. Therefore, the second polarizing filter 5 is installed on the front side of the display surface 4 of the light emitting display 2 so as to form the predetermined angle according to the refractive index thereof. At this time, if the installation angle of the second polarizing filter 5 can be adjusted by an appropriate angle adjusting mechanism,
The installation at a predetermined angle with respect to the target illumination light source 1 is easy.
（発明の効果） 本発明は以上の通り、偏光フィルターを合理的に利用す
ることにより、照明用光源自体に工夫をせずに、十分な
照明光反射防止効果を低コストで得ることができ、そし
て照明用光源の機能並びに表示器の機能も損なわないと
いう効果がある。(Effect of the invention) As described above, the present invention can obtain a sufficient illumination light reflection preventing effect at a low cost by rationally utilizing the polarizing filter without devising the illumination light source itself. Further, there is an effect that the function of the illumination light source and the function of the display are not impaired.
第１図は本発明の基本概念を表した説明的斜視図、第２
図は本発明の実施例を表した夫々説明的断面図、説明的
平面図である。また第３図（ａ）、（ｂ）、（ｃ）は従
来例を表した説明的断面図である。 符号１……照明用光源、２……発光式表示器、３……第
一の偏光フィルター、４……表示面、５……第二の偏光
フィルター、６ａ，６ｂ，７ａ，７ｂ……光、８……前
面、９……天井。FIG. 1 is an explanatory perspective view showing the basic concept of the present invention, and FIG.
The drawings are respectively an explanatory sectional view and an explanatory plan view showing an embodiment of the present invention. 3 (a), (b), and (c) are explanatory sectional views showing a conventional example. Reference numeral 1 ... Illumination light source, 2 ... Emissive display device, 3 ... First polarization filter, 4 ... Display surface, 5 ... Second polarization filter, 6a, 6b, 7a, 7b ... Light , 8 ... front, 9 ... ceiling.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原 俊弘 東京都新宿区中落合１―１―７ 下落合ア パート401号 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toshihiro Hara 1-1-7 Nakaochiai Shinjuku-ku, Tokyo Shimochiai Apart No. 401
Claims (2)
明用光源側に、前記発光式表示器方向の光をＰ偏光とす
るように第一の偏光フィルターを設置すると共に、発光
式表示器の表示面の前面側に、偏光方向を前記第一の偏
光フィルターの偏光方向と直交させると共に、前記第一
の偏光フィルターを通ったＰ偏光の入射角がブルースタ
ー角となるように第二の偏光フィルターを設置したこと
を特徴とする発光式表示器に於ける照明光反射防止機構1. A first polarizing filter is installed between the illumination light source and the light emitting display on the illumination light source side so that the light in the direction of the light emitting display is P-polarized, and the light is emitted. The polarization direction is orthogonal to the polarization direction of the first polarization filter on the front side of the display surface of the formula display, and the incident angle of the P-polarized light passing through the first polarization filter is the Brewster angle. Illumination light reflection prevention mechanism in a light emitting display characterized by having a second polarization filter installed.
式表示器の表示面の前面側に、設置角度を調節可能に構
成したことを特徴とする発光式表示器に於ける照明光反
射防止機構2. The illumination light in a light emitting display according to claim 1, wherein the second polarizing filter is configured such that the installation angle can be adjusted on the front side of the display surface of the light emitting display. Anti-reflection mechanism
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11563390A JPH0634140B2 (en) | 1990-05-01 | 1990-05-01 | Illumination light reflection prevention mechanism in light emitting display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11563390A JPH0634140B2 (en) | 1990-05-01 | 1990-05-01 | Illumination light reflection prevention mechanism in light emitting display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0412388A JPH0412388A (en) | 1992-01-16 |
| JPH0634140B2 true JPH0634140B2 (en) | 1994-05-02 |
Family
ID=14667478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11563390A Expired - Lifetime JPH0634140B2 (en) | 1990-05-01 | 1990-05-01 | Illumination light reflection prevention mechanism in light emitting display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634140B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08136852A (en) * | 1994-11-02 | 1996-05-31 | Olympus Optical Co Ltd | Optical device having eyepiece optical system |
| EP0778440B1 (en) * | 1995-12-05 | 2002-11-13 | Matsushita Electric Industrial Co., Ltd. | Backlight illuminated colour display device |
| JP2009276574A (en) * | 2008-05-15 | 2009-11-26 | Nitto Denko Corp | Video viewing facility |
-
1990
- 1990-05-01 JP JP11563390A patent/JPH0634140B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0412388A (en) | 1992-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0333333B1 (en) | Display device | |
| JPH07101561B2 (en) | Floodlighting device | |
| TW200500784A (en) | Reflection type screen | |
| EP1505840A2 (en) | Lens shift mechanism and projection type video display | |
| US4732441A (en) | Oriented-reflection reflective mirror screen | |
| JPH07264527A (en) | Liquid crystal projector | |
| JP3405171B2 (en) | Projector device | |
| JPH0634140B2 (en) | Illumination light reflection prevention mechanism in light emitting display | |
| JP3197777B2 (en) | Image display device | |
| CA2290686A1 (en) | Contrast improvement in liquid crystal light valve projectors | |
| CA2313916A1 (en) | Lift installation | |
| JP3384722B2 (en) | Rear projection type video projector | |
| JPH0756119A (en) | Polarizing screen for projector | |
| JPH05225806A (en) | Display lighting system | |
| JPH0412387A (en) | Illumination light reflection preventing mechanism in display of emission system | |
| JPH0438346Y2 (en) | ||
| JP3328821B2 (en) | Image display device | |
| JP2973625B2 (en) | Screening system | |
| JP2751870B2 (en) | Polarizing screen system | |
| JPH09106008A (en) | Projector | |
| JPH0682747A (en) | Lighting method for liquid crystal projector arranged indoors | |
| JPH09211733A (en) | Indoor structure provided with polarizing screen | |
| JP2842337B2 (en) | Display for simulator | |
| JP3338345B2 (en) | Video projection device | |
| JPH06138429A (en) | Projector system |