JPH11161187A - Multiscreen crt display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save space and to reduce labor for installation by providing plural CRTs whose tube surfaces are positioned at least on two side surfaces of a cabinet having (n) side surfaces. SOLUTION: This display is equipped with the cabinet 1 having four side surfaces, for instance, and four CRTs 11 to 14. The tube surface of the corresponding CRT is exposed on each side surface of the cabinet 1 and positioned at a position shifted from the vertical center line of the corresponding side surface of the cabinet 1 toward the left by a specified distance. By arranging the CRTs 11 to 14 in the cabinet 1 in such a way, the electron gun of the CRT gets into a part, which is a dead space in the conventional display, so that the dead space is reduced. Since four CRTs are mounted in one cabinet in the case of installation, four CRTs are carried simultaneously. The tube surfaces of the CRTs are not provided on all the side surfaces, and the number of the side surfaces of the housing where the tube surfaces of the CRTs are exposed is set to three or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cathode ray tube (hereinafter, referred to as a cathode ray tube).
Simply called "CRT". ) Regarding the display.

[0002]

2. Description of the Related Art Computers are used in various fields, and a CRT display characterized by a high-resolution screen is mainly used as a display of the computer.

As shown in FIG. 5, a housing 51 of a conventional CRT display has a front portion 53 on which a tube surface of a CRT 52 is located, a back portion 54, and two side portions 55.

In the case 51, a front part 5 is provided.
3 has the largest cross-sectional area, and the back section 54 has the smallest cross-sectional area.

The outer shape of the housing 51 is substantially similar to the outer shape of the CRT 52. A CRT 52 is provided in a space 56 in the housing 51, and a CRT drive circuit (not shown) is provided below the CRT 52.

Although this conventional CRT display occupies a larger space than a flat panel display such as a liquid crystal display used in a portable computer, it is not necessary to install many CRT displays in a limited space. There were no practical problems in the usage environment.

[0007]

However, in recent years,
The number of computers used has dramatically increased, and accordingly, the number of cases in which a plurality of CRT displays must be installed adjacent to each other has increased.

For example, when a plurality of CRT displays are arranged in an office or the like as shown in FIG. 6, a dead space shown by hatching is generated around these CRT displays, and the work space on the desk is limited. Cause problems. This problem becomes more pronounced as the size of the CRT display increases.

[0009] In a conference or the like, a computer and a CR
When the T displays are provided for the number of conference attendees, it is necessary to install one CRT display for each attendee, and there is a problem that much labor is required.

An object of the present invention is to provide a CRT display which can eliminate the above-mentioned problems, save space, and reduce the labor for installation.

[0011]

According to the present invention, there is provided a display comprising: a housing having n (n is an integer of 3 or more) side surfaces;
And a plurality of CRTs each having a tube surface located on at least two of the n housing side surfaces.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 is a perspective view showing the appearance of a CRT display according to an embodiment of the present invention. FIG. 1 is a cross-sectional view showing the internal structure of the CRT display. FIG. It is a top view showing a state.

Referring to FIG. 1, the present embodiment has a housing 1 having four side surfaces and four CRTs 11, 12, and 13.
And 14. On each side surface of the housing 1, a corresponding CRT tube surface is exposed, and each tube surface is displaced by a predetermined distance to the left from a vertical center line of the corresponding side surface of the housing 1. It is positioned.

By arranging the CRTs 11, 12, 13 and 14 in the housing 1 in this manner, the CRTs 11, 12, 13, and 14 are located in a dead space in the above-described conventional display.
Since the electron gun of the CRT enters, the dead space is reduced as compared with the related art.

Further, at the time of installation, a conventional CRT display must carry four housings. In the present embodiment, since four CRTs are mounted in one housing, four CRTs are mounted. Can be carried at the same time.

In the present embodiment, for four sides,
Although four CRT screens are mounted so as to be positioned, it is not necessary to provide CRT screens on all side surfaces. In addition, the number of sides of the housing where the CRT tube surface is exposed is also 3
All that is required is the above.

Next, in the present embodiment, an example of an image signal input control circuit for inputting an image signal to each CRT will be described with reference to FIG.

Referring to FIG. 4, the image signal input control circuit is provided outside the housing 1, and includes a channel 40-1, a channel 40-2, a channel 40-3, and a channel 40-4.
Input connection terminals 41 to which the respective image signals are supplied
-1, 41-2, 41-3 and 41-4.

The external connection terminal 41-1 is connected to the first input terminal of the external signal changeover switch 43 and the switch 42-1.
Are connected to the first input terminal of Similarly, the external connection terminal 41-2 is connected to the second input terminal of the external signal changeover switch 43 and the first input terminal of the switch 42-2, and the external connection terminal 41-3 is connected to the second input terminal of the external signal changeover switch 43. 3 input terminal and the first input terminal of the switch 42-3, and the external connection terminal 41-4 is connected to the fourth input terminal of the external signal changeover switch 43 and the switch 4-3.
2-4 are connected to the first input terminal.

The output terminal of the switch 43 is connected to the switch 42
-1 to -4 are connected to the second input terminals.

The switches 42-1, 42-2, 42-3, and 42-4 constitute an interlock switch 42. By operating the interlock switch, the first input terminals of the switches 42-1 to 4-4 are output terminals. The switches 42-1 to 4-4 are respectively connected to the second input terminals or the output terminals 44-1 to 4-4.

For example, when used for a meeting or the like, the interlocking switch is operated to connect the second input terminals of the switches 42-1 to 4-4 and the output terminals 44-1 to 4-4, respectively. As a result, the image signal from the output terminal of the switch 43 is commonly supplied to all the CRTs, and the same screen is displayed on each CRT. The image signal to be displayed can be selected by operating the external signal changeover switch 43 so that the output terminal of the external signal changeover switch 43 is connected to a desired input terminal.

When images of the channels 40-1 to 40-4 are individually displayed on each CRT, the interlocking switches are operated to set the first input terminal and output terminal 44-1 of the switches 42-1 to 4-4.
To 4 are respectively connected.

[0025]

As described above, the present invention has an effect that the display installation efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a CRT display of the present invention.

FIG. 2 is a top view showing a state where the present embodiment is installed on a desk.

FIG. 3 is a perspective view of the embodiment.

FIG. 4 is a circuit diagram illustrating an example of an image signal input control circuit.

FIG. 5 is a cross-sectional view showing a structure of a conventional CRT display.

FIG. 6 is a top view showing a state in which four conventional CRT displays are installed on a desk.

[Explanation of symbols]

1 display housing 11, 12, 13, 14 CRT 40-1, 40-2, 40-3, 40-4 channel 41-1, 41-2, 41-3, 41-4 external input connection terminal 42 interlocking switch 43 external signal changeover switch 44 output terminal 51 housing 52 CRT 53 front part 54 back part 55 side part

Claims (4)

[Claims] 1. A housing having n (n is an integer of 3 or more) side surfaces, and at least two CRTs whose tube surfaces are located on at least two side surfaces of the n housing side surfaces. A multi-screen CRT display, comprising: 2. On the side surface of the CRT where the tube surface is exposed,
2. The multi-screen CRT display according to claim 1, wherein the tube surface of the CRT is placed at a position shifted from the vertical center line of the side surface by a predetermined distance in the horizontal direction. 3. The control circuit according to claim 1, further comprising a control circuit for selecting whether to supply the same image signal to the plurality of CRTs or to supply individual image signals to each of the plurality of CRTs. Multi-screen CRT display. 4. The control circuit is provided corresponding to the at least two CRTs, an output terminal connected to each of the CRTs, a first input terminal to which at least two image signals are supplied, respectively. , A second input terminal, the output terminal and the first input terminal.
Or at least two first switches for selectively connecting to a second input terminal; an output terminal to which all of the second input terminals of the at least two first switches are connected; and the at least two first switches. Having at least two input terminals each supplied with an image signal, comprising: the output terminal; and a second switch for connecting a desired one of the at least two input terminals. The multi-screen CRT display according to claim 3, wherein: