JPS63153244U - - Google Patents
Info
- Publication number
- JPS63153244U JPS63153244U JP1987046177U JP4617787U JPS63153244U JP S63153244 U JPS63153244 U JP S63153244U JP 1987046177 U JP1987046177 U JP 1987046177U JP 4617787 U JP4617787 U JP 4617787U JP S63153244 U JPS63153244 U JP S63153244U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- total reflection
- screen
- projection screen
- sides
- 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
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図および第２図はこの考案の第１の実施例
を示す背面投影スクリーンの一部分の斜視図およ
び１つのレンズ単位の光拡散状態図、第３図およ
び第４図はこの考案の第２の実施例を示す背面投
影スクリーンの一部分の斜視図および１つのレン
ズ単位の光拡散状態図、第５図および第６図はこ
の考案の第３の実施例を示す背面投影スクリーン
の一部分の斜視図および１つのレンズ単位の光拡
散状態図、第７図および第８図はこの考案の第４
の実施例を示す背面投影スクリーンの一部分の斜
視図および１つのレンズ単位の光拡散状態図であ
る。
１，１１…スクリーン本体、２，１２…レンチ
キユラーレンズ、３，１３…レンズ単位、４，１
４…レンズ部、５，１５…全反射面、５ａ，１５
ａ…立上り面。
1 and 2 are a perspective view of a part of a rear projection screen and a light diffusion state diagram of one lens unit showing a first embodiment of this invention, and FIGS. 3 and 4 are a perspective view of a part of a rear projection screen showing a first embodiment of this invention. FIGS. 5 and 6 are perspective views of a portion of the rear projection screen showing a third embodiment of this invention; FIGS. 5 and 6 are perspective views of a portion of the rear projection screen showing a third embodiment of the invention; and the light diffusion state diagrams of one lens unit, Figures 7 and 8 are the fourth diagrams of this invention.
FIG. 2 is a perspective view of a portion of a rear projection screen and a light diffusion state diagram of one lens unit, showing an embodiment of the present invention. 1, 11... Screen body, 2, 12... Lenticular lens, 3, 13... Lens unit, 4, 1
4... Lens part, 5, 15... Total reflection surface, 5a, 15
a... Rising surface.
Claims (1)
させる背面投影スクリーンであつて、スクリーン
表面に、頂部をレンズ部として両側面を全反射面
とした多数のレンズ単位が連続するレンチキユラ
ーレンズを形成してなり、かつ前記レンチキユラ
ーレンズの各レンズ単位の両側の全反射面の上端
側を、この全反射面の傾斜角よりも急角度で立上
る立上り面としたことを特徴とする背面投影スク
リーン。 This is a rear projection screen that allows an optical image projected from the rear side to be observed from the front side, and the screen surface has a lenticular lens in which a number of continuous lens units each having a lens portion at the top and total reflection surfaces at both sides are arranged on the screen surface. and wherein the upper end side of the total reflection surface on both sides of each lens unit of the lenticular lens is a rising surface that rises at a steeper angle than the inclination angle of the total reflection surface. projection screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046177U JPS63153244U (en) | 1987-03-28 | 1987-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046177U JPS63153244U (en) | 1987-03-28 | 1987-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63153244U true JPS63153244U (en) | 1988-10-07 |
Family
ID=30865599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987046177U Pending JPS63153244U (en) | 1987-03-28 | 1987-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153244U (en) |
-
1987
- 1987-03-28 JP JP1987046177U patent/JPS63153244U/ja active Pending