JPH02128143U - - Google Patents
Info
- Publication number
- JPH02128143U JPH02128143U JP1989035968U JP3596889U JPH02128143U JP H02128143 U JPH02128143 U JP H02128143U JP 1989035968 U JP1989035968 U JP 1989035968U JP 3596889 U JP3596889 U JP 3596889U JP H02128143 U JPH02128143 U JP H02128143U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- light
- light emitting
- incident
- total reflection
- 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
- 239000002131 composite material Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
第１図〜第４図は本考案の一実施例を示したも
ので、第１図は透過型スクリーンのレンチキユラ
ーレンズ部分の平面図、第２図および第３図は全
反射面で反射された光の光跡図、第４図は全反射
光出射部からの出射光の明るさの角度特性図であ
る。第５図および第６図は本考案の他の実施例を
示す透過型スクリーンのレンチキユラーレンズ部
分の平面図および全反射光出射部からの出射光の
明るさの角度特性図である。第７図〜第１０図は
従来の透過型スクリーンを示したもので、第７図
はレンチキユラーレンズ部分の平面図、第８図お
よび第９図は全反射面で反射された光の光跡図、
第１０図は全反射光出射部からの出射光の明るさ
の角度特性図である。第１１図は３つの表示体の
表示画像を透過型スクリーンに投影する３眼式の
背面投影型投影装置の平面図である。
１０，２０……レンチキユラーレンズ、１１，
２１……光出射面、１２，２２ａ，２２ｂ……凸
レンズ部、１３，２３……全反射光出射部、１３
ａ，１３ｂ，１３ｃ，２３ａ，２３ｂ，２３ｃ…
…傾斜面、１４，２４……全反射面、Ｒ……赤色
画像光、Ｇ……緑色画像光、Ｂ……青色画像光。
Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a plan view of the lenticular lens part of the transmission screen, and Figures 2 and 3 are reflections on the total reflection surface. FIG. 4 is a diagram showing the angular characteristics of the brightness of the light emitted from the total reflection light emitting section. 5 and 6 are a plan view of a lenticular lens portion of a transmission screen and an angular characteristic diagram of the brightness of the light emitted from the total reflection light emitting portion, showing another embodiment of the present invention. Figures 7 to 10 show conventional transmission screens, with Figure 7 being a plan view of the lenticular lens portion, and Figures 8 and 9 showing the light reflected by the total reflection surface. trace map,
FIG. 10 is an angular characteristic diagram of the brightness of the light emitted from the total reflection light emitting section. FIG. 11 is a plan view of a three-lens rear projection type projector that projects display images of three display bodies onto a transmission screen. 10,20...lenticular lens, 11,
21...Light emission surface, 12, 22a, 22b...Convex lens part, 13, 23...Total reflection light emission part, 13
a, 13b, 13c, 23a, 23b, 23c...
... Sloped surface, 14, 24 ... Total reflection surface, R ... Red image light, G ... Green image light, B ... Blue image light.
Claims (1)
ンに向けてその背面側から投影し、この複数の画
像を重ねた合成画像を前記透過型スクリーンの前
面側から観察させる背面投影型の投影装置に使用
される透過型スクリーンであつて、スクリーン前
面に、このスクリーンの背面側から入射する複数
の画像光の並び方向に対して直交する方向に沿う
ストライプ状のレンチキユラーレンズを多数本互
いに平行に形成してなり、かつ前記レンチキユラ
ーレンズは、その頂部を光出射面とし、両側面を
スクリーン背面側からの入射光を前記光出射面に
向けて反射させる全反射面とするとともに、前記
光出射面のうち、前記全反射面で反射された光が
出射する全反射光出射部を、前記複数の表示体か
らそれぞれ互いに異なる入射角でスクリーンに入
射して前記全反射面で反射された各方向の光が入
射する部分をそれぞれ傾き角の異なる傾斜面とし
た屈曲面とし、この全反射光出射部の各傾斜面の
傾き角をそれぞれ、この各傾斜面に入射する前記
各方向の光をほぼ同じ方向に向けて屈折させる角
度としたことを特徴とする透過型スクリーン。 Used in a rear projection type projection device in which images displayed by a plurality of display bodies are projected from the rear side toward a transmissive screen, and a composite image obtained by overlapping the plurality of images is observed from the front side of the transmissive screen. This is a transmissive screen, in which a large number of striped lenticular lenses are formed parallel to each other on the front surface of the screen in a direction perpendicular to the direction in which a plurality of image lights incident from the back side of the screen are arranged. The lenticular lens has a top portion as a light emitting surface, and both side surfaces as total reflection surfaces that reflect incident light from the back side of the screen toward the light emitting surface, and the light emitting surface. Among the surfaces, a total reflection light emitting part from which light reflected by the total reflection surface is emitted is incident on the screen from the plurality of display bodies at mutually different incident angles and reflected by the total reflection surface in each direction. The portions into which the light enters are curved surfaces with different inclination angles, and the inclination angle of each inclined surface of this total internal reflection light emitting section is set such that the light in each direction incident on each of the inclined surfaces is approximately A transmissive screen characterized by an angle that refracts the light in the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989035968U JPH0740996Y2 (en) | 1989-03-29 | 1989-03-29 | Transmissive screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989035968U JPH0740996Y2 (en) | 1989-03-29 | 1989-03-29 | Transmissive screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02128143U true JPH02128143U (en) | 1990-10-23 |
| JPH0740996Y2 JPH0740996Y2 (en) | 1995-09-20 |
Family
ID=31541782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989035968U Expired - Lifetime JPH0740996Y2 (en) | 1989-03-29 | 1989-03-29 | Transmissive screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740996Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63165838A (en) * | 1986-12-27 | 1988-07-09 | Dainippon Printing Co Ltd | Transparent screen |
-
1989
- 1989-03-29 JP JP1989035968U patent/JPH0740996Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63165838A (en) * | 1986-12-27 | 1988-07-09 | Dainippon Printing Co Ltd | Transparent screen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0740996Y2 (en) | 1995-09-20 |
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