JPH0888821A - Rear screen video display system with exposure beam passage - Google Patents

Abstract

PURPOSE: To provide a rear screen video display system which can confirm an image from a floodlight when there is an undesired wall. CONSTITUTION: A rear screen video display system 1 is provided with a floodlight 26, a base unit 20 and a screen unit 10, and a connecting element such as a leg 30 or a pole is provided for holding the base unit 20 and the screen unit 10 in mutually strong and vertically separate relation so as to form an opening space 70 between these units. Then, a mirror system 12 reflects the image flooded from the floodlight 26 on a screen part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a video display system,
In particular, it relates to a rear screen video display system with an exposed beam path.

This application is intended for portable rear screen television cabinets and was filed on Nov. 20, 1992 in US Ser. No. 07 / 979,135.
No. 08 / 243,885, filed May 17, 1994, as a part-pending application of US application No. 08 / 224,053, filed April 7, 1994, filed on May 17, 1994. Related to some of the pending applications.

[0003]

BACKGROUND OF THE INVENTION Present day rear screen video display systems typically include a large cabinet that contains a plurality of mirrors and a video projector.

[0004]

Such a cabinet is a very disturbing entity, heavy and deep, and its optical elements, especially when three images are emitted from the three CRTs of the cabinet. Must be placed carefully. Furthermore, when the projector and the mirror inside the cabinet are moved with respect to the screen, proper convergence is impaired and color fringing occurs, resulting in poor image quality. Moreover, such rear screen video display systems are not portable in construction and are not "modularized", so the various components of the system are portable, easy to replace and package. The structure is inseparable for convenience.

Flooded televisions that do not require a screen and project an image directly onto a wall are a recent technology and their inventor, Eugene Dorgoff, US Pat.
No. 012,274 and No. 5,300,942. But, for example, if there is a defective wall space, if the wall is painted in a dark color, if the wall has an irregular surface, or if it is in a very brightly lit room, Images from such floodlit televisions are not easily visible. Moreover, there is often no suitable location for the position of the floodlight, or a person may accidentally walk in the beam path.

While useful for use, CRT rear screen floodlighted televisions are very heavy and bulky and take up a large space in a normal room. Furthermore,
A carrier is required to install such a unit and it is very difficult to move such a unit.

Accordingly, it is an object of the present invention to provide a rear screen video display system that allows viewing of the image from the projector in the presence of defective wall space.

[0008] Another object of the invention is to allow viewing of the image emitted from the projector in a brightly lit room or when the conditions of the wall are below the optimum conditions for viewing the projected image. To provide a rear screen video display system.

Yet another object of the present invention is to provide a rear screen where the components of the overall system have a "modularized" construction for portability and easy replacement of key components and convenience of packaging. To provide a video display system.

It is a further object of the present invention to provide a rear screen video display system with replaceable surface edging.

[0011]

In order to achieve the above object, the present invention has (a) a light projecting means, (b) a base portion for supporting the light projecting means, and (c) a screen. And a connection means for holding the screen portion and the base portion in a fixed and vertically spaced relationship so that an opening space is formed between the screen portion and the screen portion and the base portion. And (e) a mirror unit including at least one mirror for reflecting an image emitted from the light projecting unit on the screen unit, and an image carrier beam emitted from the light projecting unit when the system is operated. It is configured to pass through the opening space.
That is, the above object and another object of the present invention include a base unit in which a light emitter is assembled or a light emitter is simply incorporated therein, a screen unit, one or more mirrors, and a base unit. It is realized by providing a rear screen video display system, each provided with connecting means such as legs or "posts" extending between the screen units.

In the case of the "modular construction" embodiment, the screen unit is detached from the connection means and then
This connecting means is detached from the base unit. In one embodiment, the screen unit and the base unit are unfolded from a very thin folded state to a large set state in use, and from a connecting means that holds the base unit and the screen unit at a distance. It can be removed.

The rear screen video display device of the present invention also includes a replaceable surface edging frame if a portion of the cabinet exterior surface is frayed or damaged, or if the owner simply desires a different appearance for the device. I have it.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings, like reference numerals are used throughout the various drawings to identify like components.
FIG. 1 is a front perspective view of a first embodiment of a rear screen video display system 1 according to the present invention. This system 1
Is a screen unit 10 and a base unit 2
0 and a connecting means, in this embodiment, a leg 30 which firmly holds the base unit 20 and the screen unit 10 in a separated relationship, as the connecting means.・ Unit 10
A "free space" 40 is defined between.

The base unit 20 has a generally rectangular-like shape with a front surface 21, a rear surface 22, side surfaces 23 and 24, and a top surface 25, respectively. The LCD or other light projector is located inside the base unit 20, as shown by the dotted lines. Base unit 2
0 has a two-mirror system, in the preferred embodiment one mirror for receiving the incident beam projected onto the screen 5 from a projector 26 located in a position suitable for use with the three-mirror system. Only 12 are used in the screen unit 10. For a three-mirror system, the beam 27 (see FIG. 25) from the projector 26 is directed to the first mirror 28, which reflects the image to the second mirror 29, which in turn The opening space 7 of the base unit 20 is directed toward the third mirror 12 in the screen unit 10, which is shown by the dotted line in FIG.
Further reflect and magnify the image from 0 through space 40. The mirror 12 optionally further magnifies the image reflected on the screen 5 for viewing.

In another embodiment, the screen unit 10 is manufactured as a modular component, which helps for portability of the video display system, facilitates component replacement and simplifies overall device packaging. To In another such embodiment, the screen unit 1
0 is a leg 30 that can be attached to and detached from the base unit 20.
Can be removed from.

The screen 5 may be covered with a light control film in order to reduce the influence of ambient light. Alternatively, the light tunnel 100 (see FIG. 4) may be used.
The light tunnel 100 comprises a base unit 20 and a screen unit 1 as shown by the dotted line 101 in FIG.
It is configured to extend over the entire distance between 0 and 0, or simply over a portion of that distance (see optical tunnel 100 in FIG. 4). Also, light tunnel 1
00 can also be incorporated in the pillar 50 of the second embodiment (see FIG. 6). In such a case, pillar 5
The 0 position needs to be changed.

6-10 show a second embodiment of a rear screen video display system 1 according to the present invention.
In the case of this embodiment, the connecting means is a column 50 instead of the leg 30 shown in the first embodiment. In this example,
The optional position of the projector 26 is the base unit 20.
Outside of the pillar 50 is the interior of the room 110. Floodlight 26
Can optionally be located on top of the base unit 20.

In the preferred single mirror configuration, the single mirror 12 is incorporated into the screen unit 10 for use. In this configuration, the projector 26 is, for example,
As shown in FIG. 6, the base unit 20 is arranged in a state of being inclined at a certain angle on the front surface of the base unit 20. The projection beam from the projector 26 enters the mirror 12 of the screen unit 10 and is reflected toward the screen.

11 to 15 show a third embodiment of the rear screen video display system according to the present invention.
In the case of this embodiment, the front part of the screen unit 10 is extended downward and is in contact with the base unit 20. The rear part of the screen unit 10 is supported on a pillar 50. The extended front portion is formed with an elongated hole or caliber for aesthetics and to reduce the weight of the overall system.

16 to 20 show a fourth embodiment of the rear screen video display system according to the present invention.
In this embodiment, the rigid connection means is a V-shaped support structure 60 for the screen unit 10. In this embodiment, the open space 70 of the base unit 20 allows the light to come directly from the projector 26 or reflects off the mirror and enters the screen unit 10 through the space 71 and reflects off the mirror 12. Then, it is configured so as to be able to move toward the screen 5.

In the case of the fifth embodiment of the present invention, FIGS.
4, the screen unit 210
Has a configuration somewhat similar to the portable rear screen television cabinet described in US application Ser. No. 07 / 979,135. In particular, the screen unit 210 includes a front rectangular structure 202 including a front panel 203 with a large rectangular screen 205.
It has. The front rectangular structure 202 includes a front panel 203, a top plate 206, and two side plates 207 and 208, respectively. The rear member 209, as shown here, together with the mirrors 28 and 29 of the base unit 20 and the projector 26 (see FIG. 25) are configured to accommodate the large mirror 12 that guides the projected image to the rear screen 205. Has been done. The base unit 20 and any pillars 50 or legs 30 are also assembled (foldable) and portable.

The screen unit 210 is set in the operating layout in the following state. Base panel 21
The pin 214, which secures 5 and 216, is placed in the retracted position and the panels 215 and 216 are pivoted downward using hinges 217, as shown in FIG. Under this condition, the top mirror panel 218, which will be described in more detail later, is removed. The right and left side panels 219 and 220 are pivoted about hinges 230 into use positions. Side panels 219 and 220
Are rectangular parts 221 and 2 configured as one piece
22 and triangular portions 223 and 224, respectively. The rectangular rear panel 216 is the base panel 2
15 via a hinge mechanism 217 (see FIG. 2).
3). The hinged rear panel 216 is pivoted upwards so that the plug 231 of the rear panel 216 enters corresponding holes 232 in the rear ends 233 of the side panels 219 and 220. Other tightening mechanisms, of course, can be used as appropriate to secure the panel. The opening space 70 is formed by cutting a part of the bottom panel 215 through which the light beam can travel from the projector 26 or the mirror to the screen unit 10.

Leg housing 80 (see FIGS. 23-24)
Alternatively, other securing means are provided on the side panels 219 and 220 to accommodate the legs 30 of the device so that the screen unit 210 can be properly positioned above the base unit 20. In another embodiment of the modular construction and this fifth embodiment, the screen unit 210 can actually be removed from the leg 30 or the pillar 50. The legs 30 or posts 50 can also be removed from the screen unit 10. In this embodiment, the screen unit 10 is folded into a small shape. The base unit 20 can also be configured to be foldable, prefabricated, and portable, as described above.

In another embodiment of the invention, the legs 30 are removed from the base unit 20 and retained inside the screen unit 10 for easier transport of the unit 1 (FIG. 27). reference).

The mirror system 12, 28, 29 comprises three front mirrors (see FIG. 25). Mirror 12
Is in the screen unit 10 and mirrors 28 and 2
9 is in the base unit 20. The mirror system projects light from the projector 26 onto the rear screen 5. The mirrors 28 and 29 are located on the base unit 20 as shown. In the preferred embodiment,
An odd set of mirrors (preferably one) is used to reverse the direction of the projected image to easily ensure proper view on the rear screen 5. The one or more mirrors are curved to magnify the reflected image, which reduces the distance between the mirrors,
It is possible to use a small cabinet.

Preferably, in the case of a three mirror system,
The directions of the three mirrors 12, 28 and 29 (see FIG. 25) are determined as follows. The first mirror 28 is positioned so as to reflect the incident image by 90 degrees from the initial direction.
Therefore, the first mirror 28 forms an angle of 45 degrees with respect to the initial angle of the projected beam 27. Reflected beam 36
Passes through a second mirror 29, which is preferably at an angle of 40 degrees with respect to the vertical direction and is tilted upwards. An angle smaller than 40 degrees can be set. Any distortion can be corrected by performing an optical correction on the curved portion of the mirror. Beam 36 from the first mirror 28
Is reflected by the second mirror 29 (beam 37) and guided through the free space 40 to the third mirror 12 of the screen unit 10. The third mirror 12 is in a diagonal direction with respect to both the base unit 20 of the device 1 as well as the front panel surface of the device 1. The third mirror 12 also has an angle of 40 degrees with respect to the vertical direction. Other angle settings are possible. The beam 38 is reflected by this third mirror 12 and travels to the rear screen 5 for viewing.

The size of the mirrors 12, 28 and 29 may be, for example, the size of the screen, the size of the overall assembly,
Depending on the distance between the mirror and the screen, the beam divergence due to the characteristics of the projection lens of the projector 26, the rear mirror is always larger than the front mirror.
The mirrors can be secured to any flat structure using standard means, and these structures can then be secured to the overall device by any standard means.

The overall assembly structure can be easily folded and disassembled for storage in a small unit. Therefore, the following steps are performed. The top mirror panel 218 with the largest mirror 12 is removed or pivoted about the hinge. The rear panel 216 is removed from the rear ends 233 of the side panels 219 and 220, and the side panels 219 and 220 are pivoted towards the inside of the front side 202 of the device 1. The top mirror panel 218 is then fixed. The back panel 216 as well as the base panel 215 are folded and secured by the pins 214. A recessed handle 239 or any other means is provided on the cabinet to facilitate transport.

According to another feature of the invention, the cabinet outline of a rear screen video display system is such that such surfaces are damaged or frayed or the owner simply requires a different appearance for the system. If so, it can be changed by removing the flat panel surface that presents the appearance of the cabinet. For example, in FIG.
Illustrates cover strips 206A and 207A that are adhered to and removed from top plate 206 and side plate 207 by known means. This feature can be realized not only for each of the embodiments disclosed herein, but also for the sixth embodiment shown below, for all exposed planes of the cabinet.

28 to 36 show the assembly structure of the sixth embodiment of the rear screen video display system 1 according to the present invention. FIG. 28 shows the system 1 in a tilted position in the assembled state. The system 1 has a screen 205, a left side, a right side, and base panels 219 and 2.
Front panel 203 with 20 and 215 (see FIG. 35)
A front rectangular structure 202 comprising This front rectangular structure 202 is made from various types of materials such as thin metal plate or wood or plastic and is provided with a number of holes, for example, as shown in FIG. The structure 202 includes an upper plate 206 and two side plates 207 and 208.
Is further equipped.

To make the system 1 suitable for operation, the left and right sides and the base panels 219, 220 and 21.
The 5 is clamped in a defined position and placed face up, as illustrated in FIG. Base panels 219 and 22
The structure for rotating 0 and 215 and the mechanism for locking are known and ordinary mechanisms.

The next step in assembling the system 1 is to prepare the floodlight box assembly 300 (see FIG. 30) for insertion into the system. The floodlight box assembly 300 includes a front plate 303, a rotatable left and right side and a topmost plate 307, 308 and 306, and a half wedge 304 attached to the bottom of the left and right side plates 307 and 308. 311 is provided. The left and right plates 307 and 308 are configured to be folded back or rotated to a specified position so as to be perpendicular to the front plate 303 as shown in FIG. The wedges 304 and 311 are aligned with the elongated grooves 313 and 331, and these wedges 304 and 311 are attached to the base panel 21.
5, the assembly 304 is locked in place in the system 1 by pushing the assembly 300 together, so that the wedges 304 and 311 are aligned with each other in FIG.
As shown in FIG. 5, it is possible to slide in the elongated grooves 313 and 331.

The next step is to mount the floodlight stand assembly 400 (see FIG. 31) which includes a base plate 416 having a rear plate 401, wedges 404 and 411, a floodlight mounting plate 432, and a cord slot 433. Preparation. The rear plate 401 is "folded up" or rotated upwards so as to be perpendicular to the base plate 416 as shown in FIG. 31, and is clamped by a known ordinary mechanism. The floodlight 26 is directed toward the front of the system 1 (between the wedges 404 and 411) with the floodlight cord inserted into the slot 433 and illustrated in FIG.
The system 1 floodlight stand assembly 400, which is mounted in place on the mounting plate 432 after being pulled under the base plate 416, allows the half wedges 404 and 411 to slide toward the slots 304 and 311. Then board 401 is system 1
It is incorporated into the system 1 in a state of facing the back surface of the (see FIG. 33). The top plate 306 is then pivoted downwards and placed near the floodlight box assembly 400.

The next step is to connect the mirror panel 318 (see FIG. 35) with the mirror 312 to the rear ends of the left and right panels using mirror brackets (not shown). Once the power cord and audio / video cable are ready for connection, the system is operational. When this embodiment of the invention is activated, the beam emanating from projector 26 passes through space 71 (see FIG. 36), is reflected by mirror 312 and enters screen 205 where it creates an image. As further seen in FIG. 36, this embodiment also comprises an "exposure beam path" there, similar to the first to fifth embodiments. The beam path is not easily visible to an observer in front of the system 1, but is visible from the side. However, because of the "exposed" nature of the beam, "glow" is visible to the observer in front of system 1. As with the first to fifth embodiments, the various exterior planes of the system can also be replaced for repair or simply to give a different look. For example, the screen edging frame 450 (see FIG. 35) can be easily replaced.

While the preferred embodiment of the invention has been described in detail, various modifications and adaptations can be made without departing from the spirit and scope of the invention as set forth in the appended claims. It is possible.

[0037]

According to the rear screen video display system of the present invention, it is possible to confirm the image from the projector when there is a defective wall space. Further, it is possible to confirm the image emitted from the projector in a brightly illuminated room or when the condition of the wall is lower than the optimum state for confirming the projected image.

By making the components of the entire system into a "module" structure, the base unit, the screen unit and their connecting means are separated (removed).
It is possible, ensuring portability and convenience of easy replacement and packaging of major components.

Also, if a portion of the cabinet outer surface is frayed or damaged, or if the owner simply wishes for a different appearance of the device, a member fixed to a visually visible outer plane (eg, screen edging). (For frames, etc.) can be replaced.

[Brief description of drawings]

FIG. 1 is a front perspective view of a first embodiment of a rear screen video display system according to the present invention.

2 is a plan view of the rear screen video display system of FIG. 1. FIG.

3 is a front view of the rear screen video display system of FIG. 1. FIG.

FIG. 4 is a side view of the rear screen video display system of FIG.

5 is a rear view of the rear screen video display system of FIG. 1. FIG.

FIG. 6 is a front perspective view of a second embodiment of a rear screen video display system according to the present invention.

7 is a plan view of the rear screen video display system of FIG.

FIG. 8 is a front view of the rear screen video display system of FIG.

9 is a side view of the rear screen video display system of FIG. 6. FIG.

FIG. 10 is a rear view of the rear screen video display system of FIG.

FIG. 11 is a front perspective view of a third embodiment of a rear screen video display system according to the present invention.

FIG. 12 is a plan view of the rear screen video display system of FIG. 11.

FIG. 13 is a front view of the rear screen video display system of FIG. 11.

FIG. 14 is a side view of the rear screen video display system of FIG. 11.

FIG. 15 is a rear view of the rear screen video display system of FIG. 11.

FIG. 16 is a front perspective view of a fourth embodiment of a rear screen video display system according to the present invention.

FIG. 17 is a plan view of the rear screen video display system of FIG.

FIG. 18 is a front view of the rear screen video display system of FIG. 16.

19 is a side view of the rear screen video display system of FIG.

20 is a rear view of the rear screen video display system of FIG.

FIG. 21 is a rear perspective view of the screen unit of the fifth embodiment of the rear screen video display system according to the present invention.

22 is a rear perspective view of the system of FIG. 21, showing the base unit and the rear panel pivoted outward and downward to remove the top panel.

FIG. 23 is a rear perspective view of the system of FIG. 21, with the side panel swaying out into the operative position.

FIG. 24 is a rear perspective view of the system of FIG. 21, showing the state in which the side panel is moved to the operating position and then the rear panel is rotated to the operating position.

FIG. 25 is a perspective view of a three mirror system of a rear screen video display system according to the present invention.

FIG. 26 is a perspective view showing a state of panel surface exchange according to the present invention.

FIG. 27 is a front perspective view of the device of FIG. 21 in the portable transport position of the device.

FIG. 28 is a rear perspective view of the sixth embodiment of the rear screen video display system according to the present invention when the system is prone.

29 is a rear perspective view of the system of FIG. 28, showing the side view and base panel locked in a defined position in the upward position.

FIG. 30 is a rear perspective view of the system of FIG. 29 and is a perspective view of a system including the floodlight box assembly components of the present invention.

FIG. 31 is a rear perspective view of a floodlight stand assembly component of the present invention.

32 is a rear perspective view of the floodlight stand assembly of FIG. 31. FIG.

FIG. 33 is a rear perspective view of a system including both a floodlight box and a stand assembly component.

FIG. 34 is a rear perspective view of a system including all major components.

FIG. 35 is a front perspective view of a rear screen video display system according to the present invention.

FIG. 36 is a side view of the system illustrated in FIG.

[Explanation of reference numerals] 1 rear screen video display system (device) 5,205 rear screen 10,210 screen unit 12 mirror (third mirror) 20 base unit 26 projector 27 beam 28 first mirror 29 second mirror 30 Legs 40 Free space 50 Pillars 70 Open space 300 Floodlight box assembly 312 Mirror 400 Floodlight stand assembly 450 Frame

 ─────────────────────────────────────────────────── ———————————————————————————————————————————————— Inventor Marvin Maslow, United States, 10017 New York, New York, Forty Seventh Street East 240, Apartment 8F

Claims (11)

[Claims] 1. A light projecting means; (b) a base portion supporting the light projecting means; (c) a screen portion having a screen; (d) a space between the screen portion and the base portion. Connection means for holding the screen portion and the base portion in a positional relationship that is firmly and vertically separated from each other so that an opening space is formed, (e) an image emitted from the light projecting means is displayed on the screen portion. Mirror means comprising at least one mirror for reflecting, and a rear screen, characterized in that the image carrier beam emitted from the light projecting means when the system is operated is configured to pass through the aperture space. Video display system. 2. A rear screen video display system according to claim 1, wherein said light projecting means comprises a light valve projector. 3. The light valve projector is L
The rear screen video display system of claim 2, wherein the rear screen video display system is a CD projector. 4. The rear screen video display system of claim 1, wherein the screen portion is foldable. 5. The rear screen video display system of claim 1, wherein the at least one mirror forms part of the screen portion. 6. The rear screen video display system of claim 1, further comprising reducing means for reducing the effects of ambient light. 7. The rear screen video display system of claim 6, wherein the reducing means comprises a light control film disposed to cover the rear screen. 8. The rear screen video display system of claim 6, wherein the reducing means comprises a light tunnel. 9. The rear screen video display system of claim 1, further comprising a removable member secured to a visually visible exterior plane of the system. 10. The rear screen video display system according to claim 1, wherein the base portion is configured to be rotatable. 11. The rear screen video display system of claim 10, wherein the base portion comprises means for securing a floodlight.