JPH07261157A - Liquid crystal display device and information transmission device provided with it - Google Patents

Abstract

PURPOSE:To improve the appearance and to prevent the deformation in a display panel and the deterioration, etc., in the picture quality of a liquid crystal panel. CONSTITUTION:Since a non-light-transmitting member 21 is arranged in a gap between a liquid crystal panel 6 and a display plate 3 so as to surround a display area A, no TAB 9, etc., is visible from the gap. Then, the appearance of a liquid crystal display device 20 is improved. Further, the deformation in the display plate 3 is controlled by the member 21, and the gap between the liquid crystal panel 6 and the display plate 3 is held at a fixed level. Therefore, there is no possibility that the display plate 3 comes into contact with the liquid crystal panel 6 and nor the picture quality of the panel 6 is lowered. Further, since the member 21 is an elastic member, even when external force is applied to the display plate 3, the external force is attenuated by the member 21, and the liquid crystal panel 6 is hardly affected by the external force. Thus, the picture quality of the panel 6 is maintained similarly to the above mentioned.

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 for preventing vibration of a liquid crystal panel and an information transmission device equipped with the liquid crystal display device.

[0002]

2. Description of the Related Art Conventionally, various liquid crystal display devices in which a liquid crystal panel and a backlight device are integrally assembled have been proposed. FIG. 5 shows an example thereof.

The liquid crystal display device 1 is provided with an upper casing 2, and the upper casing 2 has an opening 2a and a transparent display plate (transparent portion) 3 that closes the opening 2a. . In addition, a boss 2b is formed inside the upper housing 2,
A panel fixing member 5 is horizontally supported on the lower ends of these bosses 2b. Further, the fixing member 5 has a frame shape, and an opening 5a is formed in the center thereof. A liquid crystal panel 6 is adhered to the lower surface of the fixing member 5 with an adhesive 7 so as to close the opening 5a. The liquid crystal panel 6 has two glass substrates 6a and 6b formed with transparent electrodes and arranged so as to face each other.
A liquid crystal (not shown) is held in the gap 6b. Polarizing films are attached to both upper and lower surfaces of the liquid crystal panel 6 (not shown). Further, a TAB 9 having a driving IC mounted thereon is connected to an end portion of the liquid crystal panel 6, and the TAB 9 has a peripheral circuit board 10 (hereinafter, referred to as a “driver”) for the driving IC for driving the liquid crystal panel 6. Board 10 ") is connected. The driver board 10 is screwed to the fixing member 5. On the other hand, a backlight device 11 is provided on the lower surface of the fixing member 5.
Is attached. This backlight device 11 is
As is well known, it has a fluorescent lamp, a reflection plate and a diffusion plate, and is configured to irradiate the liquid crystal panel 6 with uniform brightness. A lower casing 12 is detachably supported by the upper casing 2, and the casings 2 and 12 house the liquid crystal panel 6 and the like.

Further, in the above-mentioned liquid crystal display device 1, the display plate 3 (the upper surface of the housing 2) and the liquid crystal panel are arranged so that the display plate 3 does not come into contact with the liquid crystal panel 6 even if the display plate 3 is deformed by an external force. A constant gap d was provided between the two. In addition, it is preferable that the portion of the liquid crystal panel 6 other than the display area A is invisible from the viewpoint of improving the appearance. The printing portion 13 of No. 1 was formed in a frame shape.

By the way, if the gap d between the display plate 3 (the upper surface of the housing 2) and the liquid crystal panel 6 is large, it is not preferable since the impression that the panel surface is recessed is not preferable. The liquid crystal panel 6 as shown in FIG. 1 is fixed to the upper surface of the fixing member 5, and the gap d is reduced.

[0006]

However, in the liquid crystal display device adopting this structure, since the liquid crystal panel 6 is fixed to the upper surface of the fixing member 5, as shown in detail in FIG.
The TAB 9 and the driver board 10 can be easily visually recognized from the gap, which is disadvantageous in appearance.

Further, since the gap d is made small, the material of the display plate 3 is made to have an excessively high rigidity in order to prevent damage to the liquid crystal panel.

In view of the above, the present invention provides a liquid crystal display device having an improved appearance and the like by providing an elastic member in the gap between the periphery of the liquid crystal panel and the upper casing, and an information transmission device including the liquid crystal display device. It is intended to provide.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a liquid crystal display device according to the present invention is a liquid crystal panel in which liquid crystal is held between a pair of substrates on which electrodes are formed. And a housing in which the liquid crystal panel is housed and a transparent portion is formed so that the liquid crystal panel can be viewed, and the transparent portion and the liquid crystal panel face each other with a predetermined distance. In particular, a non-translucent elastic member is arranged between the housing and the liquid crystal panel so as to surround the display area of the liquid crystal panel.
In this case, it is preferable to dispose the elastic member between the transparent portion of the housing and the liquid crystal panel.

An information transmission device using the liquid crystal device according to the present invention includes a graphic controller that outputs a data signal and a scanning method signal, a scanning signal control circuit that outputs scanning line address data and a scanning method signal, and a display. An information signal control circuit for outputting data and scanning method signals, and the above-mentioned liquid crystal display device are provided.

[0011]

According to the above structure, since the non-translucent elastic member is arranged between the housing and the liquid crystal panel so as to surround the display area of the liquid crystal panel, the transparent portion and the liquid crystal panel are separated from each other. Even though there is a gap between them,
The inside (non-display area) of the liquid crystal display device is not visible through the gap.

[0012]

Embodiments of the present invention will be described below with reference to FIG. The same parts as those shown in FIG. 1 are designated by the same reference numerals, and the duplicate description will be omitted.

In the liquid crystal display device 20 according to the present embodiment, between the liquid crystal panel 6 and the display plate (transparent portion of the housing 2) 3 is located at the innermost side of the non-display area B of the liquid crystal panel 6. An elastic member 21 such as moltoprene is disposed in the. The elastic member 21 has a frame shape surrounding the display area A, and is made of a non-translucent material so that the inside of the liquid crystal display device 20 is not visually recognized. In addition, the elastic member 21
Is held by being sandwiched between the liquid crystal panel 6 and the display plate 3, and its upper surface is in contact with the printing unit 12.

Next, the operation of this embodiment will be described.

According to this embodiment, since the non-translucent member 21 is arranged in the gap between the liquid crystal panel 6 and the display plate 3 so as to surround the display area A, the TAB 9 and the like are visually recognized from the gap. It will not be done. In addition, the member 21 enables the display board 3
Is restricted, and the gap between the liquid crystal panel 6 and the display plate 3 is kept constant. Further, since the member 21 is an elastic member, even when an external force is applied to the display plate 3, the external force is damped by the member 21.

Next, the effect of this embodiment will be described.

According to this embodiment, the TAB 9 and the like are hidden by the elastic member 21, so that the appearance of the liquid crystal display device 20 can be improved without being visually recognized from the outside. Also,
Even if an external force is applied to the display plate 3, the elastic member 21 restricts the deformation of the display plate 3 and prevents the liquid crystal panel 6 from being damaged due to contact with the display plate 3. Therefore,
In order to prevent the deformation of the display plate 3, the display plate 3 does not need to be made of a material having a rigidity higher than necessary, and the cost and weight of the display plate 3 do not increase. Further, since the member arranged for light shielding is not a rigid member but an elastic member, vibrations and impacts applied to the display board 3 are attenuated.
Furthermore, even when vibration or shock is transmitted to the liquid crystal panel 6 via the fixing member 5, the vibration or the like transmitted to the liquid crystal panel 6 is quickly attenuated by the elastic member 21, so that the image quality of the liquid crystal panel is improved. It is also possible to stop the decline to a minimum.

In the above embodiment, the elastic member 2 is used.
1 is sandwiched between the liquid crystal panel 6 and the display plate 3, but need not be limited to this.
May be adhered to the liquid crystal panel 6 or the display panel 3.

Further, in the above embodiment, the elastic member 2
The upper surface of No. 1 is brought into contact with the display plate 3 in order to suppress the deformation of the display plate 3. However, the present invention is not limited to this, and when the opening 2a of the housing 2 has substantially the same area as the display area A, the upper surface of the elastic member 21 is in direct contact with the housing 2 instead of the display plate 3. You may

Finally, peripheral devices of the liquid crystal display device 20 will be briefly described with reference to FIG.

As shown in FIG. 4, a scanning signal applying circuit 402 and an information signal applying circuit 403 are connected to the liquid crystal display device 20 according to this embodiment, and these circuits 40 are connected.
A scanning signal control circuit 404, an information signal control circuit 406, a drive control circuit 405, and a graphic controller 407 are sequentially connected to 2, 403. And
Data and a scanning method signal are transmitted from the graphic controller 407 to the scanning signal control circuit 404 and the information signal control circuit 406 via the drive control circuit 405. The data of these is the data of these circuits 4
The address data and the display data are converted by 04 and 406, and the other scanning method signal is directly sent to the scanning signal applying circuit 402 and the information signal applying circuit 403. Further, the scanning signal applying circuit 40
2 applies a scanning signal having a waveform determined by the scanning method signal to the scanning electrode determined by the address data, and the information signal applying circuit 403 determines whether the scanning signal is the white or black display content sent by the display data. It is configured to apply an information signal having a fixed waveform.

[0022]

As described above, according to the present invention,
Since the inside (non-display area) of the liquid crystal display device is not visually recognized, the appearance of the liquid crystal display device can be improved. In addition, even if external force is applied to the housing, especially its transparent part,
The elastic member restricts the deformation of the liquid crystal panel and prevents the liquid crystal panel from being damaged due to contact. Therefore, in order to prevent the deformation, it is not necessary to use a material having a rigidity higher than necessary, and the cost and weight of the liquid crystal display device are not increased. Furthermore, since the member arranged for light shielding is not a rigid member but an elastic member, it is possible to damp vibrations and impacts applied to the housing. Furthermore, even if the liquid crystal panel vibrates for some reason, the vibration is quickly damped by the elastic member, so that deterioration of the image quality of the liquid crystal panel can be suppressed to a minimum.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional structure of a liquid crystal display device.

FIG. 2 is a detailed cross-sectional view for explaining a conventional problem.

FIG. 3 is a sectional view showing a structure of a liquid crystal display device according to the present invention.

FIG. 4 is a block diagram illustrating a peripheral circuit of a liquid crystal display device.

FIG. 5 is a cross-sectional view showing another example of the conventional structure of the liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Housing | casing (upper housing) 3 Transparent part (display board) 5 Panel fixing member 6 Liquid crystal panel 9 TAB 10 Driver board 11 Back light device 12 Lower housing 13 Printing part 20 Liquid crystal display device 21 Elastic member 404 Scan signal control circuit 406 Information signal control circuit 407 Graphic controller A Liquid crystal panel display area B Non-display area

Claims (3)

[Claims] 1. A liquid crystal panel which holds liquid crystal between a pair of substrates having electrodes formed thereon, and a housing which houses the liquid crystal panel and has a transparent portion formed so that the liquid crystal panel can be visually recognized. In a liquid crystal display device, wherein the transparent portion and the liquid crystal panel are opposed to each other with a predetermined distance therebetween, a non-translucent material is provided between the housing and the liquid crystal panel so as to surround a display area of the liquid crystal panel. A liquid crystal display device having a flexible elastic member. 2. The liquid crystal display device according to claim 1, wherein the elastic member is arranged between the transparent portion of the housing and the liquid crystal panel. 3. A graphic controller for outputting a data signal and a scanning method signal, a scanning signal control circuit for outputting scanning line address data and a scanning method signal, and an information signal control circuit for outputting display data and a scanning method signal. An information transmission device, comprising: the liquid crystal display device according to claim 1.