JPH08305301A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: To provide a liquid crystal display device which is small in size, is short in viewing distance, is light in weight and is preferably hardly affected by reflection of external light, etc. CONSTITUTION: A liquid crystal display having opposed two faces is illustrated as the liquid crystal display device. The liquid crystal display having the opposed two faces is constituted by disposing a front surface liquid crystal display device 11C and rear surface liquid crystal display device 12C respectively having plural liquid crystal display devices back to back in such a manner that the display contents are visible from both opposite sides and disposing back lights 113, 123 for making parallel beams incident on the respective liquid crystal display parts between these liquid crystal display parts. More preferably, the liquid crystal display device is provided with cooling means consisting of radiating fins 114, 124 and a cooling fan 22 for cooling the heat released from these back light means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a multi-faceted liquid crystal display device capable of simultaneously visually recognizing one or different display contents from two or more directions, or a cube, a spherical body or the like. The present invention relates to a polyhedron liquid crystal display device having the polyhedron structure.

[0002]

2. Description of the Related Art For example, a TV conference system or T
In a V discussion meeting, there are cases where a plurality of conference attendees sitting at different positions want to view the same image or different images at the same time. Currently, in TV debates, small CRs are placed on the desks (conference tables) of each meeting attendee.
The T display device (CRT monitor) is housed so as not to be conspicuous for TV shooting, and is housed on the conference table so that it does not interfere with the face of the other party's meeting attendees. The CRT display device can display the image currently being broadcast.

[0003]

However, such a display system is not advantageous in terms of cost because it is necessary to prepare a desk having a built-in small CRT display device for conference attendees. Further, the contents displayed on the screen of the CRT display device are invisible (difficult to visually recognize) when there is illumination light from a lighting device such as a fluorescent lamp arranged on the ceiling or the like. Therefore, various measures such as providing a light shielding plate on the screen of the CRT display device and setting an inclination of the screen of the CRT display device so that the light from the lighting device does not directly enter the screen of the CRT display device are complicated. Measures are needed. Still, in TV shooting and the like, since the illumination is particularly strong, the display contents may be difficult for conference attendees to see due to the reflection.

As a solution to such a problem, for example, it is conceivable to arrange a plurality of CRT display devices at a central position surrounding a conference table so as to face respective conference attendees (CRT display device). Multifaceted display using groups). However, since the CRT display device has a depth, there is a problem that the space occupied by the CRT display device group becomes large when a plurality of CRT display devices are arranged as such. For example, as a simple configuration, even if two CRT display devices are arranged back to back in an office or the like to reduce the occupied space, one CRT display device itself has a long depth, so two The total size of the CRT display device is increased. In addition, from the viewpoint of eye fatigue and visibility, it is necessary to view the image with a certain distance from the CRT screen. As a result, the two persons facing each other are further apart from each other. That is, if the CRT display devices are back-to-back, the total distance occupied by the CRT display devices themselves and the visual distance becomes large, and the intention to reduce the space by back-to-back two units cannot be achieved. Also, CR
Since the T display device is heavy, when two CRT display devices are installed, there is a weight problem that it becomes considerably heavy. further,
Even in such a case, the above-mentioned problem of reduced visibility with respect to the illumination still remains to be overcome.

Recently, in addition to the above-mentioned multi-faced display, there has been a demand for a stereoscopic display (polyhedral display). In such a case, the above-mentioned problems in the case of using the CRT display device, that is, the size of the depth and the length of the viewing distance, the weight of the weight, and the reduction in the visibility with respect to the illumination become more remarkable.
Polyhedral display using a CRT display device is practically difficult.

An object of the present invention is to solve the problem when it is assumed that the above-mentioned CRT display device is used for polyhedral display or polyhedral display, and to provide a practical display device capable of various polyhedral display or polyhedral display. To provide.

[0007]

SUMMARY OF THE INVENTION In the present invention, a liquid crystal display device capable of multi-faced display or polyhedron display is basically formed by combining liquid crystal display devices having a short depth dimension, a short visual distance, and a light weight, according to the purpose. Make up.

In the case of a two-face counter liquid crystal display device as an example of the multi-faced display of the liquid crystal display device of the present invention, a plurality of liquid crystal display devices are provided back to back so that the display contents can be visually recognized from both opposing sides. First and second liquid crystal display sections are arranged, and a backlight means for making light incident on each of the liquid crystal display sections is arranged between the liquid crystal display sections. The backlight means includes (a) a first backlight that emits light toward the first liquid crystal display device and a second backlight that emits light toward the second liquid crystal display device. Or (b) the first liquid crystal display device and the second liquid crystal display device.
The liquid crystal display device may have a common backlight that emits light toward both sides. Cooling means are preferably provided for cooling the heat emitted from the backlight means.

As another example of the multi-faced display of the liquid crystal display device of the present invention, in the case of a four-direction liquid crystal display device, the surface liquid crystal display portion is provided on the outer surface, respectively, so that the display contents can be visually recognized from four directions of up, down, left and right. Four sets of front surface liquid crystal display devices having a plurality of liquid crystal display devices in which the surface control substrate is combined on the inner surface are provided, and a backlight or a common back light for four sets is provided on the back surface of each of the four front surface liquid crystal display devices. Provide a light.

In the case of a 6-direction liquid crystal display device as an example of the polyhedron display of the liquid crystal display device of the present invention, the top, bottom, left, right front and back surfaces are
A surface liquid crystal display unit having a plurality of liquid crystal display devices in the liquid crystal display unit is combined with a surface liquid crystal display unit on the outer surface and a surface control substrate on the inner surface to form a cube so that the display contents can be visually recognized from the direction. 6 sets in 6
A back light or a back light common to the six sets is provided on the back surface of each of the front liquid crystal display devices.

As another example of the polyhedron display of the liquid crystal display device of the present invention, in the case of a spherical liquid crystal display device, a surface liquid crystal display portion is combined with an outer surface and a surface control substrate is combined with the inner surface, and a plurality of liquid crystal display portions are provided in the liquid crystal display portion. The surface liquid crystal display device having the liquid crystal display device is provided so as to form a partial or complete spherical body, and a back light or a common backlight is provided on the back surface of each surface liquid crystal display device.

[0012]

By arranging liquid crystal display devices having a small depth dimension and a short visual distance in combination, a liquid crystal display device capable of multi-faced display or polyhedron display having a small size can be constructed. The same image (image) or different images can be displayed on each of the multiple screens of the liquid crystal display device, and these images can be visually recognized from various directions.

When the liquid crystal display devices are assembled, the temperature of the multi-faced liquid crystal display device rises due to the heat dissipation of the backlight, so that the liquid crystal display devices are appropriately cooled by the cooling means.

[0014]

1st Embodiment: Liquid crystal display device facing two sides (both sides visible) As a first embodiment of the liquid crystal display device of the present invention, FIGS.
With reference to, the basic configuration of a liquid crystal display device facing two surfaces (both sides visible) will be described. This two-faced liquid crystal display device is an example of a multi-faced display liquid crystal display device. FIG. 1 is a common perspective view of a two-plane opposed liquid crystal display device, FIG. 2 is a first exploded cross-sectional view of the two-plane opposed liquid crystal display device illustrated in FIG. 1, and FIG. 3 is a two-plane opposed liquid crystal display device illustrated in FIG. FIG. 4 is a second exploded cross-sectional view of the counter liquid crystal display device, FIG. 4 is a third exploded cross-sectional view of the two-face counter liquid crystal display device illustrated in FIG. 1, and FIG. It is the 4th decomposition sectional view of a display. As illustrated in FIG. 1, the two-face counter liquid crystal display device 1 includes a surface liquid crystal display device (first liquid crystal display device) 11 whose display surface is oriented in a front-to-back view direction (first direction), and It has a back surface liquid crystal display device (second liquid crystal display device) 12 whose display surface is oriented in the back direct viewing direction (second direction). That is, in the two-face counter liquid crystal display device 1, the front face liquid crystal display device 11 and the back face liquid crystal display device 12 are provided so as to face each other.

With reference to FIG. 2, a two-faced opposed liquid crystal display device 1A of the first embodiment will be described. The two-face counter liquid crystal display device 1A of the first embodiment is a front surface liquid crystal display device (first liquid crystal display device) 1 in which the display surface faces the front-to-back view direction (first direction).
1A, and a back surface liquid crystal display device (second liquid crystal display device) 12 whose display surface faces the back direct viewing direction (second direction) 12
Have A. The front surface liquid crystal display device 11A includes a front surface liquid crystal display unit 111 in which a plurality of liquid crystal display devices are provided in a matrix, and a surface for controlling the position of the liquid crystal display device in the front surface liquid crystal display unit 111 depending on a voltage application state. A control substrate 112 and a front surface liquid crystal display portion backlight 113 for emitting parallel light toward the front surface liquid crystal display portion 111 are arranged as shown in the figure. In this surface liquid crystal display device 11A, the positions of a plurality of liquid crystal display devices of the surface liquid crystal display unit 111 are changed by the control voltage applied to the surface control substrate 112, and the light from the backlight 113 for the surface liquid crystal display unit is transmitted. The display content changes depending on the state or the light blocking state. The back surface liquid crystal display device 12A basically has the same configuration as the front surface liquid crystal display device 11A. That is,
The rear surface liquid crystal display device 12A includes a rear surface liquid crystal display unit 121 in which a plurality of liquid crystal display devices are provided in a matrix.
A back surface control substrate 122 and a back surface liquid crystal display section backlight 123 for radiating parallel light toward the back surface liquid crystal display section 121 are arranged as shown in the drawing. This back surface liquid crystal display device 12
Similarly to the front surface liquid crystal display device 11A, in A, the positions of the plurality of liquid crystal display devices of the back surface liquid crystal display unit 121 are changed by the control voltage applied to the back surface liquid crystal display substrate 122, and the back surface liquid crystal display unit backlight 123 is operated. The display content changes depending on whether the light is transmitted or shielded. The front surface liquid crystal display portion backlight 113 and the back surface liquid crystal display portion backlight 123 are respectively realized by illumination means that emits parallel light with minimal heat generation, for example, a combination of a fluorescent lamp and an optical system.

The contents (image or video) displayed on the front surface liquid crystal display unit 111 of the front surface liquid crystal display device 11A and the contents displayed on the back surface liquid crystal display unit 121 of the back surface liquid crystal display device 12A are controlled by the front surface control board 112. Depending on the signal and the control signal to the rear surface control substrate 122, the same content may be used, or different content may be used depending on the application and usage of the two-sided opposed liquid crystal display device 1A. Each of the front surface liquid crystal display device 11A and the back surface liquid crystal display device 12A has a shallow depth. Therefore, even if the front surface liquid crystal display device 11A and the back surface liquid crystal display device 12A are arranged back to back, the overall length is short. Compared with the case where two CRT display devices are arranged back to back, the length is considerably reduced. In addition, when a liquid crystal display device is used, the degree of eye fatigue is small, and the distance from the liquid crystal display surface to the human eye may be short. Therefore,
For example, when the two-face counter liquid crystal display device 1A is applied to an office, the distance between two chairs facing each other can be short. In addition, the weight of the two-faced liquid crystal display device 1A is equal to that of two CRT
Compared with the case where the display device is provided, the weight is considerably reduced. Further, the two-faced liquid crystal display device 1A is not affected by external light such as reflection of illumination as much as the CRT display device.

A two-face counter liquid crystal display device 1B of the second embodiment will be described with reference to FIG. The two-faced liquid crystal display device 1B of the second embodiment is a front surface liquid crystal display device (first liquid crystal display device) 11 whose display surface faces the front-to-back view direction (first direction).
B, a back surface liquid crystal display device (second liquid crystal display device) 12B whose display surface faces the back direct viewing direction (second direction), and a common backlight 21. In the two-face counter liquid crystal display device 1B of the second mode, the backlight 113 for the front face liquid crystal display unit and the backlight 123 for the back face liquid crystal display unit in the two-face counter liquid crystal display device 1A of the first form are replaced with the common backlight 21. It is a thing. Common backlight 2
Reference numeral 1 denotes a front surface liquid crystal display section 111 and a back surface liquid crystal display section 121.
Irradiate parallel light on both sides. The common backlight 21 is
Like the backlight 113 for the front surface liquid crystal display unit and the backlight 123 for the back surface liquid crystal display unit, the heat generation is as small as possible,
It is realized by an illumination means capable of emitting parallel light, for example, a combination of a fluorescent lamp and an optical system. Surface liquid crystal display device 1
The operations and advantages of the liquid crystal display device 1A and the liquid crystal display device 12A of the back surface are the same as those of the two-surface opposed liquid crystal display device 1A of the first embodiment. However, in the two-face counter liquid crystal display device 1B of the second embodiment,
Since one common backlight 21 is used instead of the backlight 113 for the front surface liquid crystal display section and the backlight 123 for the back surface liquid crystal display section shown in FIG. 2, the total distance is a two-face counter liquid crystal display. It is shorter than the device 1A.

With reference to FIG. 4, a two-face counter liquid crystal display device 1C of the third embodiment will be described. The two-faced opposed liquid crystal display device 1C of the third mode is provided with a cooling means for cooling the two-faced opposed liquid crystal display device 1A of the second form illustrated in FIG.
When the front surface liquid crystal display device 11A and the rear surface liquid crystal display device 12A are brought close to each other, the surface control board 112 and the front surface liquid crystal display portion 111 are caused by heat dissipation of the front surface liquid crystal display backlight 113 and the back surface liquid crystal display backlight 123. The back surface control substrate 122 and the back surface liquid crystal display unit 121 are heated.
Therefore, in the two-face counter liquid crystal display device 1C of the third embodiment, the front surface liquid crystal display device 11C in which the front surface liquid crystal display portion backlight 113 is provided with the heat dissipation fins 114 and the back surface liquid crystal display portion backlight 123 in which the heat dissipation fins 124 are provided. The rear surface liquid crystal display device 12C provided is disposed so as to face each other, and the heat radiation fin 114 is provided.
And the cooling fan 22 is provided below the radiation fins 124,
Air is passed from the bottom to the top through the passages facing the heat radiation fins 114 and the heat radiation fins 124 to forcibly cool the backlight 113 for the front surface liquid crystal display unit and the backlight 123 for the back surface liquid crystal display unit so that the two surfaces face each other. The entire liquid crystal display device 1C is prevented from being heated. That is, in this example, the cooling means includes the heat radiation fins 114, the heat radiation fins 124, and the cooling fan 22. The display content and the method of the two-face counter liquid crystal display device 1C illustrated in FIG. 4 are the same as those of the two-face counter liquid crystal display device 1A illustrated in FIG.

The cooling fan 22 may be continuously rotated, or a temperature sensor (not shown) may be provided at an appropriate position of the two-face counter liquid crystal display device 1C. The temperature is detected, and when the temperature exceeds a certain temperature, the fan 14 is operated, and the backlight 113 for the front surface liquid crystal display section is operated via the heat radiation fins 114 and 124.
It is desirable to cool the back surface liquid crystal display backlight 123 from the viewpoint of reducing the life and power consumption of the cooling fan 22.

The cooling device is not limited to the cooling fan 22 and the radiation fins 114 and 124 illustrated in FIG. 4, but various methods can be adopted. For example, as a cooling medium,
Cooling gas may be used instead of air cooling as in the above example. Further, instead of the cooling fan 22, a cooling water conducting pipe is brought into contact with the radiating fins 114 and 124, and cooling water is passed through the cooling water conducting pipe to dissipate the radiating fins 114,
The radiating fins 124 may be cooled. In particular, it is desirable to increase the cooling effect in the case of the two-faced liquid crystal display device having two or more faces as in the above embodiment. In such a case, water cooling or the like is used from the viewpoint of cooling. desirable. Further, the cooling means is not limited to the heat radiation fin, but a member having a large cooling effect such as a heat pipe can be used.

A two-faced opposed liquid crystal display device 1D of the fourth embodiment will be described with reference to FIG. In the two-face counter liquid crystal display device 1D of the fourth mode, a cooling fan 23 that cools the common backlight 21 is provided below the common backlight 21 of the two-face counter liquid crystal display device 1B of the second mode illustrated in FIG. It is a thing. Front-side liquid crystal display device 11B and back-side liquid crystal display device 1
When they are brought close to each other, the surface control board 112 and the front surface liquid crystal display portion 11 are accompanied by the heat radiation of the front surface liquid crystal display portion backlight 113 and the back surface liquid crystal display portion backlight 123.
1. The back surface control substrate 122 and the back surface liquid crystal display section 121 are heated. In particular, since the common backlight 21 emits parallel light on both sides, the power consumption density is high, and the common backlight 21 has
There is a higher possibility of partial heating than in the case of the face-to-face liquid crystal display device 1A. Therefore, also in the two-sided liquid crystal display device 1D of the fourth embodiment, the common backlight 21 is forcibly cooled by the cooling fan 23 from the lower part to the upper part of the common backlight 21 to heat the entire two-sided liquid crystal display device 1D. To prevent it. The display content and method of the two-sided opposed liquid crystal display device 1D illustrated in FIG. 5 are the same as those of the two-sided opposed liquid crystal display device 1B illustrated in FIG.

Note that, as described above, the cooling fan 23 may be continuously rotated, or the two-face opposed liquid crystal display device 1 may be used.
Install a temperature sensor (not shown) at an appropriate position on D.
The temperature of the surface-opposing liquid crystal display device 1D may be detected, and when the temperature exceeds a certain temperature, the cooling fan 23 may be operated to cool the common backlight 21.

The cooling device is not limited to air cooling by the cooling fan 23 illustrated in FIG. 5, but cooling gas may be used. Alternatively, the cooling means is not limited to the cooling fan 23, and a member having a large cooling effect, such as a heat pipe, may be provided above and below the common backlight 21.

Second Embodiment: Four-Side Liquid Crystal Display Device As a second embodiment of the multi- surface liquid crystal display device of the present invention, a four-surface liquid crystal display device will be described with reference to FIG. This four-sided liquid crystal display device is another example of the multi-sided liquid crystal display device. The four-sided liquid crystal display device includes a front surface liquid crystal display device (first liquid crystal display device) 11 whose display surface faces the front direction, and a back surface liquid crystal display device (second liquid crystal display device) 12 whose display surface faces the back direction. , A left side liquid crystal display device (third liquid crystal display device) 13 whose display surface faces the left side surface, and a right side liquid crystal display device (fourth liquid crystal display device) 14 whose display surface faces the right side surface. The liquid crystal display devices 11 to 14 have basically the same structure. For example, the surface liquid crystal display device 11 in FIG. 6 has a surface liquid crystal display unit 111, a surface control substrate 112, and a backlight 113 for the surface liquid crystal display unit, similar to the surface liquid crystal display device 11A illustrated in FIG. A common cooling fan 24 is provided to cool the four backlights located on the inner surface. Preferably, as illustrated in FIG. 4, it is desirable to provide a radiation fin 114 on the backlight 113 for the front surface liquid crystal display unit to enhance the cooling effect. In the four-sided liquid crystal display device, the liquid crystal display devices 11 to 14 can display independent images or the same image depending on the application. According to this four-sided liquid crystal display device, images can be viewed from four sides, so that it can be applied to, for example, a video conference. Similar to the two-faced liquid crystal display device of the first embodiment, this liquid crystal display device is CR
Compared to the case where four T display devices are used, like the first embodiment, there are advantages such as a short depth, a light weight, and a short visual distance. Instead of the four backlights, one common backlight device may be used and a member for emitting parallel light in four directions may be arranged.

The multi-faced liquid crystal display device in the liquid crystal display device of the present invention is not limited to the above-mentioned two-faced liquid crystal display device and four-faced liquid crystal display device, but a five-faced liquid crystal display device, a six-faced liquid crystal display device, and the like. It is possible to configure a liquid crystal display device that performs For example, T with 6 meeting attendees
In the V conference, a 6-plane liquid crystal display device can be used to display an arbitrary image on the screen oriented to the faces of the conference attendees. Such a multi-faced liquid crystal display device has the advantages described above, that is, small size, light weight, and visibility.

Third Embodiment: Six-Plane Liquid Crystal Display Device As a third embodiment of the liquid crystal display device of the present invention, a hexahedral (or cubic) liquid crystal display device will be described with reference to FIG. This hexahedral liquid crystal display device is an example of a polyhedral liquid crystal display device. The six-sided liquid crystal display device includes a front surface liquid crystal display device (first liquid crystal display device) 11, a rear surface liquid crystal display device (second liquid crystal display device) 12, and a left side surface, which are oriented in each of six directions of a cubic surface. Liquid crystal display device (third liquid crystal display device) 13, right side liquid crystal display device (fourth liquid crystal display device)
14, upper side liquid crystal display device (fifth liquid crystal display device) 1
5 has a lower side liquid crystal display device (sixth liquid crystal display device) 16. The liquid crystal display devices 11 to 16 have basically the same structure. For example, the front surface liquid crystal display device 1 in FIG.
1 is similar to the surface liquid crystal display device 11A illustrated in FIG.
It has a front surface liquid crystal display unit 111, a front surface control substrate 112, and a front surface liquid crystal display unit backlight 113.

In such a six-panel liquid crystal display device, six
The heat generated by one backlight or one common backlight corresponding thereto tends to be higher than that of the two-face counter liquid crystal display device and the four-face liquid crystal display device. Therefore, a common cooling fan 25 is provided in the inner cavity of the cube to cool the six backlights located on the inner surface. Preferably, as illustrated in FIG. 4, it is desirable to provide a radiation fin 114 on the backlight 113 for the front surface liquid crystal display unit to enhance the cooling effect. The cooling fan 2
In order to make the cooling effect of No. 5 effective, holes are provided at four locations on the lower surface corners and four locations on the upper surface corners, and the rotation of the cooling fan 25 causes air to flow from the four holes on the lower surface corners inside the cube ( It is desirable that the heating air is drawn into the inner cavity) and the heated air is discharged from four corners of the upper surface. In particular, in order to prevent heating of such a hexahedral liquid crystal display device, it is also desirable to apply the water cooling described in the description of the first and second embodiments described above.

In the hexahedron liquid crystal display device, the liquid crystal display devices 11 to 16 can display independent images or the same image. According to this hexahedral liquid crystal display device, images can be viewed from six directions. Similar to the two-face opposed liquid crystal display device of the first embodiment, this liquid crystal display device is shorter in depth, lighter in weight, and less visually observable than in the case of using six CRT display devices. It has advantages such as short distance.

Fourth Embodiment: Spherical Liquid Crystal Display Device As a fourth embodiment of the liquid crystal display device of the present invention, a spherical liquid crystal display device will be described with reference to FIG. The spherical liquid crystal display device illustrated in FIG. 8 is obtained by expanding the hexahedral liquid crystal display device illustrated in FIG. 7 into a spherical body. That is, the liquid crystal display device of a certain surface shown in FIG. 7 is arranged on each surface, and the whole is configured as a spherical liquid crystal display device. As a spherical liquid crystal display device, it is possible to form a perfect spherical body,
It can also be a partial spherical body, that is, a spherical structure. In addition, in this spherical liquid crystal display device, a very small high-definition liquid crystal display device is used to display different continuous images as a whole of the spherical liquid crystal display device, so that a stereoscopic image with extremely high resolution can be displayed. Also in this spherical liquid crystal display device, cooling means is provided as in the hexahedral liquid crystal display device.

The implementation of the liquid crystal display device of the present invention is not limited to the exemplary embodiments described above. That is, the above-described embodiments are merely illustrative specific examples, and the present invention includes not only the above-described embodiments but also combinations of the above-described embodiments, or modified modes that can be easily performed by those skilled in the art. It can be applied to various aspects which those skilled in the art can reach from the description.

[0031]

According to the present invention, a small liquid crystal display device can be realized. Further, according to the present invention, a liquid crystal display device having a short visual distance can be realized. Further, according to the present invention, a lightweight liquid crystal display device can be realized. The liquid crystal display device of the present invention is unlikely to be affected by reflection of external light.

By using the liquid crystal display device of the present invention having the above-mentioned effects, various displays can be performed, and it can be applied to various uses.

[Brief description of drawings]

FIG. 1 is a common perspective view of a two-face opposed (both-side visible) liquid crystal display device as a first embodiment of the liquid crystal display device of the present invention.

FIG. 2 is an exploded cross-sectional view of a first mode of the two-plane opposed liquid crystal display device illustrated in FIG.

FIG. 3 is an exploded cross-sectional view of a second mode of the two-plane opposed liquid crystal display device illustrated in FIG.

FIG. 4 is an exploded cross-sectional view of a third embodiment of the two-face counter liquid crystal display device illustrated in FIG.

FIG. 5 is an exploded cross-sectional view of a fourth mode of the two-plane opposed liquid crystal display device illustrated in FIG.

FIG. 6 is a perspective view of a four-sided liquid crystal display device as a second embodiment of the liquid crystal display device of the present invention.

FIG. 7 is a perspective view of a hexahedral liquid crystal display device as a third embodiment of the liquid crystal display device of the present invention.

FIG. 8 is a perspective view of a spherical liquid crystal display device as a fourth embodiment of the liquid crystal display device of the present invention.

[Explanation of symbols]

 1, 1A, 1B, 1C, 1D ················································································ Heat dissipation fin 12 ・ ・ Backside liquid crystal display device 121 ・ ・ Backside liquid crystal display unit 122 ・ ・ Backside control board 123 ・ ・ Backside liquid crystal display backlight 124 ・ ・ Radiation fin 13 ・ ・ Left side liquid crystal display device 14 ・ ・ Right side surface Liquid crystal display device 15 ・ ・ Upper side liquid crystal display device 16 ・ ・ Lower side liquid crystal display device 21 ・ ・ Common backlight 22-25 ・ ・ Cooling fan

Claims (11)

[Claims] 1. A first and a second liquid crystal display section each having a plurality of liquid crystal display devices are arranged back to back so that the display contents can be visually recognized from both sides facing each other, and between the liquid crystal display sections. A liquid crystal display device in which a backlight unit for making light incident on each liquid crystal display unit is provided. 2. The backlight means includes a first backlight which emits light toward a first liquid crystal display device, and a second backlight which emits light toward a second liquid crystal display device. The liquid crystal display device according to claim 1, further comprising: 3. The liquid crystal display device according to claim 2, further comprising cooling means for cooling the heat emitted from the backlight means. 4. The cooling means comprises a first cooling fin mounted on the side facing the irradiation surface of the first backlight and a second cooling fin mounted on the side facing the irradiation surface of the second backlight. The liquid crystal display device according to claim 3, further comprising a cooling fin and a cooling fan that cools the first and second cooling fins. 5. The liquid crystal display device according to claim 1, wherein the backlight means has a common backlight that emits light toward both sides of the first liquid crystal display device and the second liquid crystal display device. 6. The liquid crystal display device according to claim 5, further comprising cooling means for cooling the heat emitted from the backlight means. 7. The liquid crystal display device according to claim 6, wherein said cooling means has a fan for cooling said backlight means and its vicinity. 8. A liquid crystal display device having a plurality of liquid crystal display devices in which a surface liquid crystal display portion is combined with an outer surface and a surface control substrate is combined with an inner surface thereof so that display contents can be visually recognized from four directions of up, down, left and right. A liquid crystal display device in which four front surface liquid crystal display devices are provided, and a backlight or a common backlight is provided on the back surface of each of the four front surface liquid crystal display devices. 9. A front surface liquid crystal display unit is combined with an outer surface, and a surface control substrate is combined with the inner surface of the liquid crystal display unit so that the display contents can be visually recognized from six directions of up, down, left and right, and front and back, and the liquid crystal display unit has a plurality of liquid crystal display devices. A liquid crystal display device in which six sets of front surface liquid crystal display devices are provided so as to form a cube, and a back light or a common backlight for six sets is provided on the back surface of each of the six front surface liquid crystal display devices. 10. A cooling fan is provided in an inner cavity of the cube, air passage holes are provided at corners of the cube, and air is introduced from a hole on one surface side of the cube by rotation of the cooling fan. 10. The liquid crystal display device according to claim 9, wherein air is discharged from a hole on a surface side facing the one surface. 11. A surface liquid crystal display unit having a plurality of liquid crystal display devices in the liquid crystal display unit, wherein a surface liquid crystal display unit is combined on the outer surface and a surface control substrate is formed on the inner surface, to form a partial or complete spherical body. A liquid crystal display device in which a backlight or a common backlight is provided on each back surface of each front surface liquid crystal display device.