JPS629250U - - Google Patents
Info
- Publication number
- JPS629250U JPS629250U JP1985100507U JP10050785U JPS629250U JP S629250 U JPS629250 U JP S629250U JP 1985100507 U JP1985100507 U JP 1985100507U JP 10050785 U JP10050785 U JP 10050785U JP S629250 U JPS629250 U JP S629250U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- sheet
- width
- rear projection
- light transmitting
- 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
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図は本考案の一実施例の部分拡大図、第２
図は従来の背面投写装置の光学系の概略図、第３
図は第２図の背面投写形スクリーンの代表例を示
す部分図、第４図は第２図の光路説明図、第５図
、第６図は第２図の部分拡大図、第７図は他の実
施例の説明図である。
３…フレネルレンズ、５…光透過部、６…ブラ
ツクストライプ。
Figure 1 is a partially enlarged view of one embodiment of the present invention;
The figure is a schematic diagram of the optical system of a conventional rear projection device.
The figure is a partial view showing a typical example of the rear projection screen in Figure 2, Figure 4 is an explanatory diagram of the optical path in Figure 2, Figures 5 and 6 are partially enlarged views of Figure 2, and Figure 7 is It is an explanatory view of another example. 3...Fresnel lens, 5...light transmitting part, 6...black stripe.
Claims (1)
ら拡大投写する背面投写装置において、該スクリ
ーンの入射側部材であり少なくとも一面にフレネ
ルレンズを設けた第１のシートと、該スクリーン
の出射側部材であり入射面にレンチキユラーレン
ズを設け出射面に光透過部とブラツクストライプ
を設けた第２のシートとで少なくとも前記スクリ
ーンを構成すると共に、前記第２のシートのブラ
ツクストライプを中央部の幅に比べて左右端部の
幅を狭くして、左右端部の前記光透過部の幅を中
央部に比べて広くならしめるように構成したこと
を特徴とする背面投写装置。 A rear projection device that enlarges and projects an optical image from an image source onto a screen from the back side thereof, comprising: a first sheet that is an incident side member of the screen and has a Fresnel lens on at least one surface; and an exit side member of the screen. At least the screen is constituted by a second sheet having a lenticular lens on the incident surface and a light transmitting section and a black stripe on the exit surface, and the black stripe of the second sheet is compared with the width of the central portion. A rear projection device characterized in that the width of the left and right end portions is narrowed, and the width of the light transmitting portion at the left and right end portions is made wider than that at the center portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985100507U JPH0518746Y2 (en) | 1985-07-03 | 1985-07-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985100507U JPH0518746Y2 (en) | 1985-07-03 | 1985-07-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS629250U true JPS629250U (en) | 1987-01-20 |
| JPH0518746Y2 JPH0518746Y2 (en) | 1993-05-18 |
Family
ID=30970397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985100507U Expired - Lifetime JPH0518746Y2 (en) | 1985-07-03 | 1985-07-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518746Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58214138A (en) * | 1983-02-17 | 1983-12-13 | Sanyo Electric Co Ltd | Production of transmissive screen |
| JPS5969748A (en) * | 1982-10-15 | 1984-04-20 | Dainippon Printing Co Ltd | Transmission type preojecting screen |
-
1985
- 1985-07-03 JP JP1985100507U patent/JPH0518746Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5969748A (en) * | 1982-10-15 | 1984-04-20 | Dainippon Printing Co Ltd | Transmission type preojecting screen |
| JPS58214138A (en) * | 1983-02-17 | 1983-12-13 | Sanyo Electric Co Ltd | Production of transmissive screen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0518746Y2 (en) | 1993-05-18 |
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