JPH1079902A - Casing for transmission type projection television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casing for a transmission type projection television receiver which is arranged with a rotary fixed shaft and a suspending metal fittings at blind spots on the line of sight, further is provided with a slant open part with the part at a blind spot on the line of sight, and also facilitates the connection and arrangement of cables for a signal and drive source supply to a video signal processing means. SOLUTION: In this casing, a transparent screen 7 is arranged at an opening located at the front part of a casing, the screen 7 is attached so that it may cover at least the left and right plates 3 and 4 and the bottom plate 2 with a fixed frame 8, a rotary fixed shaft 31 which is smaller than the thickness of the frame 8 and a suspending metal fittings 32 which is attached to the shaft 31 are provided as the shaft 31 and the fittings 32 are at blind spots on the line of sight, a slant opening part 15 is further provided at the summit between the rear plate of the casing and the plate 2 with the part 15 at a blind spot on the line of sight, and also, the connection and arrangement of cables for a signal and drive source supply to a video signal processing means in the housing is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for a television receiver used when a transmission type projection television receiver is installed by suspending it at a high place, or when a plurality of the television receivers are installed.

[0002]

2. Description of the Related Art As a video display device in video equipment,
Television receivers using CRTs are in widespread use in various fields besides ordinary households. In such demand for television receivers, large-screen television receivers have been adopted as means for transmitting various images and information to the public. In particular, this large-screen television receiver has a limited screen size due to problems in manufacturing and safety of a cathode ray tube or liquid crystal element for displaying images. For this reason, a projection television receiver that enlarges and projects an image on a large screen is used as a device that displays an image on a large screen. This projection TV receiver has
There are a reflection type projection television receiver for viewing an image reflected from the screen, and a transmission type projection television receiver for viewing an image transmitted through the screen.

[0003] On the other hand, when transmitting images or information to a public by using a television receiver, it is necessary to make it possible for many people to view the information and to install the receiver so as not to obstruct the people. For example, when displaying a score at a bowling alley, or when displaying a competition video or displaying a competition result at a public stadium, it does not hinder the watching of the competition,
In addition, since the installation place can be easily selected, a method has been adopted in which a television receiver is suspended from the ceiling of a building.

[0004] A specific method of such installation will be described with reference to FIG. The television receiver 101 shown in FIG.
It is the same as a TV receiver used in ordinary households,
Although not shown, a CRT for displaying an image is built in, and a chassis 102 in which a processing circuit such as a signal circuit for displaying an image is mounted in the CRT is built. The television receiver 101 is housed and fixed in a frame 103 made of metal or the like, and is attached and fixed to a ceiling (not shown) of a building (not shown) by a hanging bracket 104 fixed to the frame 103. In this case, although not shown, the angle is adjusted to the most viewable angle of the video display surface calculated from the relationship between the video display surface of the cathode ray tube of the television receiver 101 and the existing distance of the viewer.

[0005] However, even if the television receiver 101 is installed in this way, it is necessary to secure the installation space for the chassis 102 built in the television receiver 101 or to secure the operation section of the television receiver 101, A slightly larger frame 105 is provided at the bottom of the cathode ray tube surface,
This frame 105 not only obstructs the viewer, but also attaches the frame 1 downward so that the video display surface is not blinded by the frame 105 from the viewer's line of sight.
A mounting structure or a fixing method in consideration of the weight of the television receiver 101 on the TV receiver 03 is required.

Further, in a case where a plurality of television receivers are closely mounted side by side, different images are displayed on the plurality of television receivers, and these different images are combined into one image, Since the side surface of the housing of the display surface exists, the size between the respective screens increases, and the connection of the images becomes unnatural.

On the other hand, the television receiver 1 described with reference to FIG.
As a method for solving the obstruction caused by the frame 105 of 01 and providing a display screen larger than a screen using a cathode ray tube, a transmission type projection television receiver is used. As shown in FIG. 10, a housing 111 which is a cabinet of the transmission type projection television receiver 110
A chassis 112 on which a video signal processing unit is mounted, a projection unit 113 such as a CRT or a liquid crystal element for projecting a video by a drive signal from the video signal processing unit,
A lens 114 for enlarging and projecting the image projected from the projecting means 113 is fixed therein. Further, the housing 1
11, the projection means 113 and the magnifying lens 1
It has a screen 115 that forms and transmits an image projected in front of 14. The television receiver 110 configured as described above is provided with hanging brackets 11 near the rear surface and the front surface of the upper surface of the housing 111, respectively.
6 and 117 are attached and fixed, and the other of the hanging fittings 116 and 117 is attached and fixed to the ceiling 118 of the building. The length of the hanging brackets 116 and 117 is adjusted to adjust the hanging angle of the television receiver 110.

When the transmission type projection television receiver 110 is used, the chassis 112 on which the video signal processing means is mounted can be fixed to the inside of the rear of the housing 111, so that only the screen 115 is mounted on the front surface of the housing 111. The screen 115 can be viewed directly by the viewer. However, when the size of the screen is increased, the distance between the projection unit 113 and the screen 115 is increased. That is, the depth dimension of the housing 111 of the television receiver is longer than that of the ordinary household television receiver 101. For this reason, the selection of the hanging position from the ceiling is restricted due to the positional relationship with the viewer. There is also a method of increasing the size of the screen 115 by increasing the magnification ratio of the magnifying lens 114. However, since the distortion of the lens 114 causes the distortion of the image projected on the screen 115 and the color shift, it is unnecessary. It is not possible to increase the magnification of the lens.

In the reflection type projection television receiver, the projection means and the screen need to be separately mounted and installed, and the projection means can be mounted on a ceiling or the like. However, if the screen is temporarily suspended from the ceiling, If the screen is not positioned at the same level as the viewer's eyes, the image will be distorted and the colors will be displaced, and the screen will block the field of view in front of the viewer.

[0010]

As described above, when a television receiver is suspended from a ceiling of a conventional building or the like, when the television receiver is used for a general household, the television receiver is specially prepared for suspension. In addition, it is necessary to use a frame that has been used, and furthermore, the frame on the front lower side of the home television receiver and the storage space of the operation unit is an obstacle to viewing the image display surface. In addition, when a transmissive projection television receiver is used, there is a problem that the hanging position is limited because the distance between the projection unit and the screen that forms the projected image is long.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a cabinet containing a video signal processing means and a video projection means, a screen mounted by a screen fixing frame below a front opening of the cabinet, and a center of gravity of the cabinet. Screen fixing frame that has a rotation fixed shaft provided on the left or right side surface on the extension line near the center of gravity or above the center of gravity, and a ceiling mount attached to the rotation fixed shaft, and that fixes a screen attached to the front surface of the cabinet. The cross section is approximately L
The screen is sandwiched between the screen fixing frame and the front opening of the cabinet, and at least the left and right side surfaces and the lower surface of the cabinet are installed in the screen fixing frame. By making the TV receiver housing larger than the thickness of the ceiling mounting bracket attached to the rotating fixed shaft provided on the side surface, it is easy to hang it from the ceiling of the building and multiple TV receivers The present invention provides a housing for a projection television receiver that can narrow the boundaries between individual screens even when the TVs are installed side by side in the vertical or horizontal direction.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the entire configuration of a housing according to the present invention, FIG. 2 is a cross-sectional view from the side of the housing according to the present invention, and FIG. 3 is a cross-sectional view from the upper surface of the housing according to the present invention.

The housing has a substantially box-like shape including a top plate 1, a bottom plate 2, left and right side plates 3, 4, a front plate 5, and a back plate 6. The front plate 5 is provided with an opening to which the screen 7 is attached, with the bottom plate 2 side as a bottom side, and the screen 7 is formed in the opening by a screen fixing frame 8 having an L-shaped cross section. 4 and the front plate 5. In this housing, a signal receiving means 9 having a video signal receiving processing circuit and the like mounted thereon and a signal reproducing means 1 are provided.
The signal receiving means 9 is attached near the back plate of the shelf plate 21 and the bottom plate 2, and the signal reproducing means 10 is attached to the shelf plate 22 and the top plate 1 of the front plate 5.
It is attached near.

The video information reproduced by the signal receiving means 9 and the signal reproducing means 10 is supplied to a projection CRT 11. In the projection CRT 11, three CRTs corresponding to the three colors of red R, green G, and blue B are attached above the inside of the housing and obliquely in the direction of the rear plate 6 of the housing. Have been. This projection CRT 11
Image light projected from the R, 11G, 11B is transmitted to a magnifying lens 12 in front of the projection cathode ray tubes 11R, 11G, 11B.
R, 12G, and 12B are projected onto a reflecting mirror 13, which is mounted diagonally to project the image light onto the screen 7, and the image light is projected on the back surface of the screen 7; The video light transmitted through 7 is viewed. The projection CRT 11
Instead of R, 11G, and 11B, a liquid crystal projection element can be used.

A pipe 14 for connecting a cable for supplying a signal and operating power to the signal receiving means 9 and the signal reproducing means 10 is attached along the back plate 6 in the vicinity of the back plate 6. The upper end of the pipe 14 is
At the lower end of the pipe 14
The joint portion between the bottom plate 2 and the back plate 6 is fixed to an inclined opening 15 formed by cutting off the portion obliquely.

A rotation fixed shaft 31 is provided on the left and right side plates 3 and 4 of the housing configured as described above, and a U-shaped hanging bracket 32 is attached to the rotation fixed shaft 31. . The thickness T1 of the hanging bracket 32 is smaller than the thickness T2 of the screen fixing frame 8 (T1 <
T2).

The relationship between the hanging bracket 32 and the housing will be described in more detail with reference to FIGS. FIG.
FIG. 5 is a cross-sectional view showing the relationship between the left side plate 3, the hanging bracket 32 and the screen fixing frame 8 as viewed from above, and FIG. 5 is a part showing the relationship between the left side plate 3, the hanging bracket 32 and the rotation fixed shaft 31. It is a sectional perspective view.

The side plate 3 is provided with a through hole 3a into which the rotation fixed shaft 31 is inserted, and the hanging bracket 32 is also provided with a through hole 32a corresponding to the through hole 3a. The rotation fixed shaft 31 is composed of a countersunk bolt 31a and a nut 31b. The bolt 31a is inserted into the through hole 32a of the hanging bracket 32 and the through hole 3a of the side plate 3, and is fixed by the nut 31b. . At this time, the outside of the through-hole 32a of the hanging bracket 32 is formed so that the dish-shaped portion of the head of the bolt 31a fits, so that it does not protrude from the outer surface of the hanging bracket 32. In other words, the shape is such that the relationship of T1 <T2, in which the thickness of the hanging bracket 32 is smaller than the thickness T2 of the fixing frame 8 of the screen 7, can be maintained.

Next, when the housing is mounted and fixed to the ceiling of a building or the like with the hanging bracket 32, the through hole 32a of the hanging bracket 32 is used as an angle adjustment for tilting the surface of the screen 7 obliquely downward. A plurality of angle adjusting holes 33 are provided in a semicircular shape in the vicinity of the upper part of the lens at predetermined angles. An angle lock pin 34 is inserted into one of the angle adjustment holes 32, and a single lock pin receiver into which the angle lock pin 34 penetrating through the angle adjustment hole 33 is inserted into the side plate 3. A hole 35 is provided. Therefore, the angle of the surface of the screen 7 can be adjusted by sequentially changing the position of the angle adjusting hole 33 inserted between the lock pin 34 and the lock pin receiving hole 35.

4 and 5, the description of the left side plate 3 will be omitted.
Although the description has been made using the side, it goes without saying that the right side plate 4 side also has the same configuration. Further, by providing the rotation fixing shaft 32 at a position near the center of gravity of the television receiver or on an extension line above the center of gravity, the television receiver can be stably mounted.

Next, a detailed configuration of the inclined opening 15 provided below the bottom plate 2 and the back plate 6 of the housing will be described with reference to FIG. This figure is an enlarged perspective view of the inclined opening 15,
The lower end of the right side plate 4 has an inclined surface 41 which is cut off in the direction of the bottom plate 2. Further, the bottom plate 2 is attached and fixed in the thickness direction of the lower end of the side plate 4 (a range indicated by a dotted line in the figure). Also, in the vicinity of the bottom surface plate 2 at the lower end of the inclined surface 41 of the side plate 4,
A first groove 42 parallel to the bottom plate 2 is provided.
2, a shelf 21 on which the signal receiving means 9 is mounted and fixed is inserted. Further, a second groove 43 provided in parallel with the first groove 42 is also provided at the upper end of the inclined surface 41 of the side plate 4, and the groove 43 can also be inserted with the shelf 21. And the shelf 21 is the first
And the second grooves 42 and 43 can be inserted. That is, the inclined opening 15 formed by the inclined surface 41 of the side plate 4 and the bottom plate 2 is formed (see FIG. 2). The shelf 21 on which the signal receiving means 9 is mounted is inserted into the first groove 42 from the opening 15 in the direction of the arrow in the figure, and is fixed at a predetermined position. At this time, a signal and a drive power supply cable inserted into the pipe 14 from the hole 1a of the upper surface plate 1 are guided to the opening 15 and connected to a cable connection terminal group of the signal receiving means 9 (not shown). . Further, the small shelf plate 45 provided with the hole 45 a is
By fixing the lower end of the pipe 14 to the hole 45a, the pipe 14 can be fixed and the guided cables can be arranged. Further, after the shelf board 21 and the small shelf board 45 are inserted from the opening 15 and the cable connection is completed, a cover 46 having a similar shape to the opening 15 for covering the inclined opening 15 is attached to cover the inclined opening 15. Consider the intrusion of powder etc. or safety considerations. Although FIG. 6 is described using the right side plate 4, it goes without saying that a similar configuration is formed on the opposing left side plate 3.

When a transmissive projection television receiver having a housing configured as described above is mounted on a ceiling of a building or the like, the projection CRT 11 and the screen 7
Since the reflecting mirror 13 is provided between the two, the depth dimension of the housing can be reduced even if the screen size is the same as that of the related art, and it is possible to suspend and fix the casing with only the single suspending bracket 32. When the viewer looks up as shown in FIG. 1, the rotation fixed shaft 31, the hanging bracket 32, the top of the front plate 5 of the housing, and the inclined opening 15 become blind spots of the screen fixed frame 8, There is no obstruction from the user's field of view, and only the screen 7 is always in the field of view, so that a housing excellent in visual recognition of images can be provided.

Next, another application example of the transmission type projection television receiver using the above-described housing of the present invention will be described. FIG. 7 shows a state in which two television receivers are mounted side by side. In this case, the rotation fixed shaft 31 and the hanging bracket 32 of the television receivers provided side by side are:
Since the screen fixing frame 8 is smaller in thickness than the screen fixing frame 8, only the screen fixing frames 8 are in close contact with each other, and the maximum width of the boundary between the two screens 7 can be the thickness of the screen fixing frame 8. When the receiver is suspended from a ceiling of a building or the like, the receiver can be attached with the hanging bracket of each television receiver.

FIG. 8 is an application example in which two television receivers are provided vertically, and FIG. 8A is a perspective view.
FIG. 8B is a sectional view. When stacking up and down in this way, rather than hanging from the ceiling of a building,
In general, a method of directly placing the apparatus on the floor is adopted in consideration of the relationship between the height between the floor and the ceiling and the line of sight. For this reason, the hanging bracket is used after being removed. In this case, the television receiver used in the upper stage is mounted on the lower television receiver with only the hanging bracket removed. On the other hand, the lower television receiver is turned 180 degrees and placed on the television stabilization stand 50, so that the bottom plates 2 of the casings of the two television receivers are opposed to each other. When the lower television receiver is reversed, the signal receiving means 9, the signal reproducing means 10 and the projection means and the reflecting mirror (not shown in the figure) are also turned upside down. Means 1
In the case of 0, since the heat is generated during the operation drive, the circuit components and the like need to be mounted so as to always be on the upper side in order to release the generated heat. However, the signal reception / reproduction means 9 and 10 of the lower television receiver are mounted upside down, and the heat generated from the signal reception / reproduction means 9 and 10 is generated by the printed circuit board and the shelf on which the circuit components are mounted. The heat dissipation is hindered by the plates 21 and 22, which causes damage or deterioration of the circuit element. For this purpose, as shown in FIG. 6, the shelf 21 on which the signal receiving means 9 is mounted is extracted from the first groove 42, the small shelf 45 is extracted from the second groove 43, and the shelf 21 is removed. Is inverted by 180 degrees and inserted into the second groove 43, the mounting of the signal receiving means 21 can be easily changed, and the signal receiving means 21 can be mounted in a state where heat can be quickly released. On the other hand, the signal reproducing means 10
Can be removed from the shelf plate 22 or removed together with the shelf plate 22, reversed inside the upper surface plate 1 of the housing, and newly re-attached, so that heat can be quickly dissipated similarly to the signal receiving means 21. It can be attached.

The shelf 22 to which the signal reproducing means 10 is attached is provided with grooves in the left and right side plates 3 and 4 of the housing like the shelf 21 to which the signal receiving means 9 is fixedly attached. Obviously, the mounting state can be reversed by using the groove. Further, it is obvious that the upside-down reversal of the image projected on the screen 7 of the lower television receiver can be easily realized by reversing the deflection magnetic field for driving the projection element and the scanning direction up / down / left / right.

In the above description, the reflecting mirror is provided between the projection element in the housing and the screen. However, when the screen size can be reduced, or the amount of light from the projection element can be increased. It is clear that when a lens or the like having a small distortion and color shift and a large magnification can be used, a reflecting mirror may not be used.

[0027]

As described above, according to the present invention, a transmissive screen is arranged at an opening in the front of a housing, and the screen is attached by a screen fixing frame so as to cover at least the left and right side plates and the bottom plate of the housing. By providing a rotation fixed shaft smaller than the thickness of the screen fixing frame and a hanging bracket attached to the rotation fixed shaft, the rotation fixed shaft and the hanging bracket are blind spots on the line of sight,
An inclined opening is provided at the top of the back plate and bottom plate of the housing to make the top a blind spot on the line of sight, and to simplify the connection and arrangement of cables for supplying signal and drive source to video signal processing means in the housing. A housing for a transmission projection television receiver can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a housing of a transmission type projection television receiver according to the present invention.

FIG. 2 is a side sectional view of the housing of the present invention.

FIG. 3 is a top sectional view of the housing of the present invention.

FIG. 4 is a cross-sectional view of a part of a rotating fixed shaft of the housing of the present invention.

FIG. 5 is a partial cross-sectional perspective view of a portion of a rotating fixed shaft of the housing of the present invention.

FIG. 6 is an enlarged perspective view of an inclined opening of the housing of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 shows yet another embodiment of the present invention,
(A) is a perspective view and (b) is a sectional view.

FIG. 9 is a perspective view showing a state in which a conventional home television receiver is suspended.

FIG. 10 is a perspective view showing a suspended state of a conventional transmission type projection television receiver.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Top plate of a housing, 2 ... Bottom plate of a housing, 3 ... Right side plate of a housing, 4 ... Left side plate of a housing, 5 ... Front plate of a housing, 6 ... Back plate of a housing, 7 ... Transmissive screen, 8 ... Screen fixing frame, 15: inclined opening, 31: rotation fixed shaft, 32: hanging bracket.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication location H04N 5/74 H04N 5/74 C H05K 5/02 7301-4E H05K 5/02 A

Claims (8)

[Claims] 1. A signal processing means for processing and reproducing a video signal, a projection means for projecting an image reproduced by the signal processing means, and a transmission type for projecting an image projected from the projection means on a back surface of a screen. In a projection television receiver, a cabinet containing the signal processing unit and the projection unit, a screen attached with a screen fixing frame below a front opening of the cabinet, and a vicinity of a center of gravity of the cabinet or an upward extension of the center of gravity. A rotation fixed shaft provided on the left and right side surfaces on the line, and a ceiling mount attached to the rotation fixed shaft,
A housing for a transmission type projection television receiver, wherein the housing is suspended and fixed at a height of a building using the ceiling hanging bracket. 2. A screen fixing frame for fixing a screen attached to a front surface of the cabinet has a substantially L-shaped cross section, and the screen is sandwiched between the screen fixing frame and a front opening of the cabinet. And at least the left and right side surfaces and the lower surface of the cabinet are provided, and the thickness of the screen fixing frame is made larger than the thickness of the ceiling mount attached to the rotation fixed shaft provided on the left and right side surfaces of the cabinet. A housing for the transmission type projection television receiver according to claim 1. 3. When a plurality of transmissive projection television receivers are arranged side by side, adjacent screen fixing frames are brought into close contact with each other, and the screen boundary width between the left and right screens is set to the thickness of the front screen fixing frame. The housing of the transmission type projection television receiver according to claim 1 or 2, wherein: 4. When the transmissive projection television receivers are installed one above the other, the television receivers installed on the lower side are turned 180 degrees and installed on a stable fixed base, and the upper and lower screens are interposed between the upper and lower screens. 3. The housing of the transmission type projection television receiver according to claim 1, wherein a screen boundary width is a thickness of the screen fixing frame. 5. The transmission type projection television receiver according to claim 1, wherein a plurality of transmission type projection television receivers are used to form a multi-screen. 6. A shelf for fixedly installing signal processing means built in the cabinet, and a groove into which the shelf is fitted and inserted inside left and right side surfaces of the cabinet,
When the transmission type projection television receiver is set up vertically, the signal processing means of the television receiver located on the lower side is fitted and inserted into the groove in which the signal processing means is fixed, and the signal processing is performed. The housing of a transmission projection television receiver according to claim 1, wherein the means can be fixedly installed by reversing the means by 180 degrees. 7. A hole provided in the vicinity of the back surface of the upper surface of the cabinet, a pipe fitted into the hole and arranged vertically in the back surface of the cabinet, and a signal processing means built in the cabinet. 7. A cable according to claim 1, further comprising a cable for supplying a signal and operating power, wherein said cable is inserted into said pipe and connected to said signal processing means. The housing of the transmission type projection television receiver described in the above. 8. A signal processing means fixedly installed inside a lower surface of the cabinet, a terminal group for connecting a signal and operating power supply cable to the signal processing means, and the signal processing means being fixedly installed. An opening which is provided in the lower part of the back surface of the cabinet for connection of a signal and operating power supply cable and has a laterally inclined opening, and a cover which covers the opening, and a chamfer dimension of the opening is set to a value of the terminal group. 8. The housing of the transmission type projection television receiver according to claim 7, wherein the height is substantially equal to or greater than the height dimension.