JPH0618984A - Back projection system provided with multifunction for performing elevating/inclined/vertical/direct projection or provided with one part thereof - Google Patents

Abstract

PURPOSE:To make a system comply with every posture on a viewer side by setting a projector in a housing box and providing a mirror and a projection curtain whose movement and angle are changed. CONSTITUTION:The projector 6(video projector, slide projector, or overhead projector, etc.) is set in the housing box 5 or a frame made of wood, plastic or metal, etc., and the mirror 3A is constituted to be fixed or moved according to a use and the angle of the mirror 3A is changed. A cover 2 is supported by a support 4 so as to hold the rear projection curtain 1 and the mirror 3. The mirror 3 is constituted so that its angle can be changed, and the angles of the cover 2, and the curtain 1 and the mirror 3 accompanying the cover 2 are changed by moving the support 4. The supports 4A and 4 can be fixed or separately moved up and down. Castors 7 are attached to the box 5 so as to enable this system to move. Therefore, the system complies with every posture on the viewer side, for example, lying posture, the posture of sitting on a chair, and standing posture, and the object thereof is from one person to many persons.

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

(B) When trying to use TV / slides for education, that is, when performing audiovisual education, there are a large number of viewers. Although it is a rear projection screen that can be covered, if it is a small accessory, it is a projection system that can directly project from a projector. (B) When a person with a sick bed watches TV, a person using a hotel or bed goes to bed to watch TV, or when watching TV while relaxing in a reclining chair, there is a screen on the ceiling. The projection system is so easy to see that the screen is tilted. (C) A projection system that allows the screen to be viewed at a low position when sitting in a general household or sitting on a chair.

[0002]

2. Description of the Related Art Conventional large televisions are heavy, and rear projection televisions are generally set at a low position and are intended for people who sit and watch. Therefore, like a restaurant or an airport lobby, you can put a TV on a stand or a hanging rack so that many people can see it.
The screen was set at a high position, but there was no system for people who were bedridden and could enjoy TV etc. after they entered the floor.

[0003]

Looking at an example of a television, the times are trending toward larger screens. If it is a cathode ray tube type, it falls into the category of 38-inch type or the largest screen, and the larger ones are cathode ray tubes. It was a method of projecting the image of through the lens and displaying the screen on the projection screen. In particular, the 38-inch CRT type has a weight of nearly 100 kg, and it is not easy to tilt up and down.

[0004]

In FIG. 1, the projector (6) may be a variety of products such as a video projector, a slide projector, an overhead projector, etc., but the most commonly used video projector is cited as an example. There are various types of video projectors, ranging from light to heavy, and it is possible to configure the screen at a predetermined position by moving only the mirror and the projection screen, and combining the eyes and mirrors (3A) and (3). The screen can be configured on the projection screen (1) provided with a predetermined angle. In addition, if the attached screen is small, a mirror (3
A) can be moved to directly project and enlarge from the projector (6).
It is also possible to remove the projection screen (1) and project onto an external projection screen. That is, the invention of a rear projection system having a multi-function or a part capable of interlocking movements such as FIG. 1, FIG. 2, FIG. 3, and FIG. Even if the screen size is the same and the projection distance is changed, the screen can be configured as long as it is within the focal range of the zoom lens.

[0005]

[Action]

(A) In FIG. 1, the projector (6) reflects the light on the mirror (3A) and the mirror (3) to project the screen on the projection screen (1). (B) The system for reflecting the time light in FIG. 2 is the same, but the mirrors (3A) and (3) need to be adjusted together with the zoom lens of the projector (6). (C) In FIG. 3, when the viewer's eye position is high, raise the cover (2) that supports the projection screen (1) and the mirror (3), and adjust to the projection screen optimal for the viewer's level. When the projection screen (1) is removed, the system can be enlarged and projected onto the external projection screen, and the projection distance from this projector (6) to the projection screen (1) can be increased, so it can be used for rear projection. If used, a large screen can be constructed with a narrow depth. (D) Move the mirror (3A) in FIG. 4 to move the projector (6)
By projecting more directly, it can be enlarged and projected onto an external projection screen. However, the required projection distance must be taken. Since recent video projectors can reverse the screen in the same way as frame slides, the projection screen can be used with both reflective and transmissive screens. (E) Since the above system takes the form of enlarged projection, it is possible to enlarge the screen, so when viewing stereoscopic images, there is a marked difference in power compared to viewing it in the size of a cathode ray tube. There is an action that comes.

[0006]

EXAMPLES Examples of the present invention will be described below. (A) Install a projector (6) (video projector, slide projector, overhead projector, etc.) in a storage box (or frame made of wood, plastic, metal, etc.) (5), and fix the mirror (3A) depending on the purpose. It has a movable structure, and the 3A mirror can be bent. (B) The cover (2) is supported by the columns (4) and holds the projection screen (1) and the mirror (3). In addition, the mirror (3) has a structure that can change the angle (it is also possible if the angle does not change).
The angle of the cover and its associated projection screen (1) and mirror (3) can be changed by moving the. (C) The columns (4A) and (4) have a structure that can be fixed or moved separately in the vertical direction. (D) A car (7) was installed because this system has one function of movement.

[0007]

With the above-described structure, the present invention can cope with all postures on the viewing side, and the efficiency of the projection space can be improved. For example (a) sleeping posture. (B) The posture of sitting on a chair. (C) Standing posture. (D) One person can target a large number of people. (E) Therefore, it can be applied to all kinds of things such as education, conferences, advertisements and exhibitions.

[Brief description of drawings]

FIG. 1 is a side sectional view in which a screen is set for a lying posture of the present invention.

FIG. 2 is a side cross-sectional view of the present invention, which is intended for a posture of sitting on a chair or a posture in which eyes are low when sitting on a floor, tatami mat, or the like.

FIG. 3 is a side cross-sectional view of the present invention when a large number of people, such as a standing person or a classroom, see the eyes, and the height of the screen is increased so that the head of the person in front does not get in the way.

FIG. 4 is a cross-sectional view in which the mirror (3A) is moved and projected from the window of the storage box (5) when it is desired to make the image larger than the attached screen of the present system.

[Explanation of symbols]

 (1) Projection screen (2) Cover (3) Mirror (4) Post (4A) Post (5) Storage box (6) Projector (7) Car

Claims (1)

[Claims] 1. A rear projection system having a multi-function or a part capable of interlocking operations as shown in FIGS. 1, 2, 3 and 4 and capable of ascending / descending / tilting / vertical / directly projecting.