JPH021993Y2 - - Google Patents
Info
- Publication number
- JPH021993Y2 JPH021993Y2 JP1983118669U JP11866983U JPH021993Y2 JP H021993 Y2 JPH021993 Y2 JP H021993Y2 JP 1983118669 U JP1983118669 U JP 1983118669U JP 11866983 U JP11866983 U JP 11866983U JP H021993 Y2 JPH021993 Y2 JP H021993Y2
- Authority
- JP
- Japan
- Prior art keywords
- screen
- holding frame
- projection
- back side
- holding
- 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
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は、リヤプロジエクシヨンテレビのスク
リーン保持に好適なスクリーン取付装置に関する
ものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a screen mounting device suitable for holding the screen of a rear projection television.
第１図は従来のリヤプロジエクシヨンテレビの
光学システムを示す縦断面図である。同図におい
て、１はスクリーン、２，３はそれぞれスクリー
ン保持枠、５は投射部、６は投射光、７，８はそ
れぞれ反射鏡、である。
FIG. 1 is a longitudinal sectional view showing the optical system of a conventional rear projection television. In the figure, 1 is a screen, 2 and 3 are screen holding frames, 5 is a projection section, 6 is a projection light, and 7 and 8 are reflecting mirrors.
投射部５からの投射光６が反射鏡７，８を介し
てスクリーン１に投映されるものであることは説
明するまでもないであろう。 It is needless to explain that the projection light 6 from the projection section 5 is projected onto the screen 1 via the reflecting mirrors 7 and 8.
第２図は第１図における要部Ａの拡大図であ
る。 FIG. 2 is an enlarged view of the main part A in FIG. 1.
同図において、投射部５からの投射光がスクリ
ーン裏面の保持枠３に当つて反射し、その反射光
がスクリーン１に入射していることが認められる
であろう。 In the figure, it will be seen that the projection light from the projection section 5 hits the holding frame 3 on the back surface of the screen and is reflected, and the reflected light is incident on the screen 1.
このように従来のスクリーン取付装置において
は、スクリーン裏面の保持枠で反射した光がスク
リーン開口部に現われ、画像性能を劣化させると
いう欠点があつた。 As described above, the conventional screen mounting device has the disadvantage that light reflected by the holding frame on the back side of the screen appears at the screen opening, degrading image performance.
本考案の目的は、従来技術の欠点であるスクリ
ーンへの不要光をなくしたスクリーン取付装置を
提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a screen mounting device that eliminates unnecessary light shining onto the screen, which is a disadvantage of the prior art.
上記目的を達成するため、本考案では、スクリ
ーンの表面側の保持枠と、裏面側の保持枠との間
に段差を設ける事により、スクリーン裏面側の保
持枠で反射した反射光が、スクリーン表面側の保
持枠で遮蔽され、スクリーン開口部に現われない
様にした。
In order to achieve the above object, in this invention, by providing a step between the holding frame on the front side of the screen and the holding frame on the back side of the screen, the reflected light reflected from the holding frame on the back side of the screen is reflected from the screen surface. It was shielded by a side holding frame to prevent it from appearing in the screen opening.
次に図を参照して本考案の一実施例を説明す
る。
Next, an embodiment of the present invention will be described with reference to the drawings.
第３図は本考案の一実施例の要部を示す拡大図
である。同図に見られるように、本実施例は、ス
クリーン１の周囲にスクリーンを保持する保持枠
２と３を配し、該保持枠２と３との間に段差４を
形成したものである。投射部５より投射された投
射光６が反射鏡７，８を経て該段差部４にて反射
しスクリーン１に投射されても、該保持枠２で遮
蔽されスクリーン開口部に現われず、高品質の画
像を提供できるという効果がある。 FIG. 3 is an enlarged view showing a main part of an embodiment of the present invention. As seen in the figure, in this embodiment, holding frames 2 and 3 for holding the screen are arranged around a screen 1, and a step 4 is formed between the holding frames 2 and 3. Even if the projection light 6 projected from the projection unit 5 passes through the reflecting mirrors 7 and 8, is reflected by the stepped part 4, and is projected onto the screen 1, it is blocked by the holding frame 2 and does not appear at the screen opening, resulting in high quality. This has the effect of being able to provide images of
第４図は本考案の他の実施例の要部を示す拡大
図である。同図に示す様に、スクリーン裏面側の
保持枠３に勾配Ｋを設ける事によつて段差を付し
ても、同様の効果が得られる。 FIG. 4 is an enlarged view showing the main parts of another embodiment of the present invention. As shown in the figure, the same effect can be obtained even if a step is provided by providing a gradient K to the holding frame 3 on the back side of the screen.
本考案によれば、スクリーン裏面側の保持枠
に、光反射防止用のテープ等を使用する事なく、
不要光のない高品質の画像を提供できるという効
果がある。
According to the present invention, there is no need to use anti-reflection tape on the holding frame on the back side of the screen.
This has the effect of providing high-quality images without unnecessary light.
第１図は従来のプロジエクシヨンテレビの光学
システムを示す縦断面図、第２図は第１図におけ
る要部Ａの拡大図、第３図、第４図はそれぞれ本
考案の一実施例の要部を示す拡大図、である。
符号説明、１……スクリーン、２……スクリー
ン保持枠、３……スクリーン保持枠、４……段差
部、５……投射部、６……投射光、７……反射
鏡、８……反射鏡。
Fig. 1 is a vertical cross-sectional view showing the optical system of a conventional projection television, Fig. 2 is an enlarged view of the main part A in Fig. 1, and Figs. 3 and 4 are each an embodiment of the present invention. It is an enlarged view showing the main part. Description of symbols, 1...Screen, 2...Screen holding frame, 3...Screen holding frame, 4...Step, 5...Projection section, 6...Projection light, 7...Reflector, 8...Reflection mirror.
Claims (1)
するプロジエツクシヨンテレビに用いるスクリー
ン取付装置において、 該スクリーンの表面側を保持する第１の保持枠
と該スクリーンの裏面側を保持する第２の保持枠
とにより該スクリーンを保持し、第２の保持枠の
該スクリーン方向の突出量が該第１の保持枠の突
出量よりも少なく設定されているスクリーン取付
装置。[Claims for Utility Model Registration] A screen mounting device used for a projection television that projects light from a projection unit from the back side of the screen, comprising a first holding frame that holds the front side of the screen and the back side of the screen. A screen mounting device that holds the screen by a second holding frame that holds the side, and the amount of protrusion of the second holding frame in the direction of the screen is set to be smaller than the amount of protrusion of the first holding frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11866983U JPS6027570U (en) | 1983-08-01 | 1983-08-01 | Screen mounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11866983U JPS6027570U (en) | 1983-08-01 | 1983-08-01 | Screen mounting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6027570U JPS6027570U (en) | 1985-02-25 |
| JPH021993Y2 true JPH021993Y2 (en) | 1990-01-18 |
Family
ID=30272662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11866983U Granted JPS6027570U (en) | 1983-08-01 | 1983-08-01 | Screen mounting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027570U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0214036Y2 (en) * | 1980-02-06 | 1990-04-17 |
-
1983
- 1983-08-01 JP JP11866983U patent/JPS6027570U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6027570U (en) | 1985-02-25 |
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