JPH0572632A - Transmission type screen - Google Patents

Abstract

PURPOSE:To obtain a thin screen and to obain picture having little blur and good resolution by using a sheet material such as polyethylene terephthalate (PET), etc., for the screen. CONSTITUTION:The thin screen 1 is obtd. by using a sheet material 2 such as PET, etc., and providing a lenticular lens 3 on the one side of this sheet 2 and a prism array 4 on the other side A resin frame 8 is provided in the peripheral area of the sheet 2 by forming several holes in the peripheral area of the sheet 2, rounding corners of the sheet 2 and then fixing the peripheral area with the resin frame 8 while some of holes are left for positioning. Further, the screen 1 with the resin frame 8 is fixed to a frame 7 with using a mounting cover 6 and the frame 7 in a manner that the resin frame 8 fixed to the screen is hooked and this cover is fixed to the frame 7 with pawls or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmissive screen of a projection display device for displaying video images, computer images and the like.

[0002]

2. Description of the Related Art Recently, a display device using a transmissive or reflective dot matrix liquid crystal (hereinafter referred to as a light valve) is used, and an image displayed on the light valve is enlarged and projected on a screen to form a large screen. The enlarged projection method, which is shown as, is drawing attention.

This is because there is a limit to the size of image display by a cathode ray tube (CRT), and the size of the cathode ray tube itself becomes large in order to enlarge the screen, and in practice, the size is about 40 inches. This is to meet the demand for obtaining more images.

Therefore, there has been provided a display device using a liquid crystal or the like to project an image to be displayed on the screen so that a magnified image can be viewed.

A transmissive screen used in a conventional projection display device of this type is disclosed in, for example, Japanese Patent Laid-Open No. 63-30836.
It can also be found in the official gazette. As shown in FIG. 6, the first transparent plate 9 having the prism array 10 and the second transparent plate 11 having the lenticular lens 12 are stacked.

[0006]

However, in the structure of the transmissive screen described above, the screen itself becomes thick, and the light transmitted through the screen is bleeding, resulting in an image with poor resolution. Further, when the screen is attached to the apparatus, a part for fixing the screen and a decorative frame on the outer periphery of the screen are required, which causes a problem that the number of parts at the time of mounting increases. Therefore, the present invention solves such a problem, and its purpose is to:
It is an object of the present invention to provide a thin-type screen with less bleeding and an image with good resolution, and to provide a fixed-type transmissive screen to which this thin screen can be attached without wrinkles.

[0007]

As a screen, a sheet material such as PET (polyethylene terephthalate) is used as a screen, and a lenticular is provided on one or both sides of the sheet material.
With a lens, Fresnel lens, prism array, etc., and a screen, frame, and mounting cover,
In order to mount a thin screen, the mounting cover is fixed to the frame by claw engagement.

When the mounting cover is mounted on the projection type display device, it becomes a decorative frame.

[0009]

【Example】

(Embodiment 1) FIG. 1 is a first embodiment of the present invention and is a sectional view according to the embodiment.

FIG. 3 shows a thin screen 1 according to the present invention.
2 is an example of the fixing structure of FIG. 2 and is a view seen from the light emission side of the screen 1 shown in FIG. 1.

FIG. 4 is a sectional view of the fixing structure of the thin screen 1 shown in FIG.

FIG. 5 is a state view in which a fixing resin frame 8 is formed around the screen 1, and FIG. 5 (a) is a front view and FIG. 5 (b) is a sectional view as seen from the side. Show.

As shown in FIG. 1, as the screen 1, P
The sheet material 2 such as ET (polyethylene terephthalate) is used, the lenticular lens 3 is attached to one surface of the sheet material 2, and the prism array 4 is attached to the other surface, whereby the thin screen 1 is obtained.

As shown in FIG. 5, the screen 1 is formed with a resin frame 8 at its peripheral portion. At this time, as shown in FIG. 5A, the peripheral portion of the sheet material 2 was formed with holes at several places to remove the corner portions. Some of the holes are used for positioning, and the periphery is fixed with a resin frame 8. Even if the corner portion of the sheet material 2 is not removed, the same effect can be obtained.

As shown in FIG. 4, the screen 1 whose periphery is formed of a resin frame 8 is hooked onto the mounting cover 6 by the frame 7 and the mounting cover 6 by the resin frame 8 attached to the screen 1. In this state, the mounting cover 6 is fixed to the frame 7 by claw engagement or the like. As a result, as shown in FIG. 3, since the corners of the screen 1 do not overlap the corners of the frame 7, the thin screen 1 can be attached without sagging or wrinkling, and the mounting cover 6 can be attached to the frame 7. And screen 1
It also serves as a decorative frame for screen 1, as it hides the corners.
Further, as shown in FIG. 4, a hole is formed in the frame 7 of the portion where the mounting cover 6 is mounted on the frame 7, and the mounting cover 6 can be removed from this hole.

(Embodiment 2) FIG. 2 shows a second embodiment of the present invention and is a sectional view according to the embodiment.

As shown in FIG. 2, as the screen 1, a thin screen 1 can be obtained even if a sheet material 2 having lenticular lenses 3 and Fresnel lenses 5 on both sides is used. As in the case of the first embodiment, the thin screen 1 is hardened at its peripheral portion with the resin frame 8 as shown in FIG.
The screen 1 can be attached to the frame 7 without slack or wrinkles, and the mounting cover 6 serves as a decorative frame.

[0018]

As described above, according to the present invention, by using a sheet material such as PET (polyethylene terephthalate) as a screen, it is possible to make a thin screen with less bleeding. The image has good resolution. Further, this thin screen can be stretched without sagging or wrinkling, and when this screen is used in a projection display device, if the frame 7 is provided with a portion to be attached to the device, the screen can be provided only by this structure. It is possible to provide the screen 1 which does not require a component for fixing 1 or a decorative frame.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a transmission screen according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a transmission screen according to a second embodiment of the present invention.

FIG. 3 is a view showing a fixing structure of a transmission screen according to an embodiment of the present invention.

4 is a cross-sectional view of FIG. 3 according to an embodiment of the present invention.

FIG. 5 is a view showing a state where a fixing resin frame 8 is formed around the transmission screen shown in FIGS. 3 and 4 according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a transmission screen according to the prior art.

[Explanation of symbols]

 1. Screen 2. Sheet material 3. Lenticular lens 4. Prism array 5. Fresnel lens 6. Mounting cover 7. Frame 8. Resin frame 9. First translucent plate 10. Prism array 11. Second translucent plate 12. Lenticular lens

Claims (3)

[Claims] 1. The screen (1), for example, PET
A sheet material (2) such as (polyethylene terephthalate) is used, and a lenticular lens (3), a Fresnel lens (5), a prism array (4), etc. are attached to one side or both sides of the sheet material (2). A transparent screen characterized by. 2. A resin frame (8) for fixing is formed around the screen (1), the frame (7) and a mounting cover (6).
And a mounting screen (6) fixed to the frame (7) by claw engagement for mounting the thin screen (1). 3. The transmissive screen according to claim 2, wherein the mounting cover (6) forms a decorative frame when mounted on the projection display device.