JP3450820B2 - Liquid crystal device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Conventionally, in a liquid crystal device in which a liquid crystal cell is fixed to a frame, it is possible to prevent shock and vibration applied to the liquid crystal device from being transmitted to the liquid crystal cell and changing the orientation of the liquid crystal to deteriorate the image quality. Therefore, the following liquid crystal cell fixing method has been adopted.

[0002]

7 and 8 are a cross-sectional view and a plan view of a liquid crystal device, respectively. The liquid crystal device mainly comprises a cell 1, a glass plate 2, a support frame 3, a backlight 10, and a backlight 10.
And a main frame 11 for housing the. The cell 1 is constructed by sandwiching a liquid crystal between two glass substrates.

As shown in FIG. 9, the support frame 3 has a frame shape with a notched central portion, and a connecting portion 12 for connecting with the main frame 11 is provided on the periphery. Also,
As shown in FIG. 10, the main frame 11 also includes a similar connecting portion 12. Then, the support frame 3 and the main frame 11 are fixed to each other at their connecting portions 12 by screws or the like as shown in FIG.

The supporting frame 3 and the glass plate 2 are attached to each other at their abutting surfaces with an adhesive to form a front frame 4.
Are configured.

The cell 1 is fixed to the glass plate 2 via a supporting member 5 having elasticity. In addition, this support member 5
As shown in FIG. 8, is fixed to the entire circumference of the outer peripheral portion of the cell 1 and the glass plate 2 with an adhesive.

In the liquid crystal device having such a structure, since the cell 1 and the glass plate 2 are adhered to each other through the elastic supporting member 5, the external impact or vibration transmitted through the main frame 11 is applied to the cell 1. It has the advantage that it is not very transmitted. This prevents the occurrence of alignment defects due to impact, which is a problem in liquid crystal cells.

[0007]

In the liquid crystal device having the above structure, when an impact is applied to the main frame 11,
The stress wave propagates from the main frame 11 to the glass plate 2 with almost no attenuation. Therefore, although the stress wave is attenuated only by the support member 5, conventionally, it was not always possible to sufficiently prevent the occurrence of alignment defects in the liquid crystal. In particular, when a ferroelectric liquid crystal is used as the liquid crystal, the orientation of the liquid crystal is likely to change due to the impact or vibration of the cell, which is one of the major factors causing the alignment defect of the liquid crystal and the deterioration of the image quality. .

In view of the above circumstances, it is an object of the present invention to sufficiently suppress the occurrence of alignment defects of liquid crystal when a shock is applied to the main frame or the support frame, and to provide a more reliable liquid crystal device. It is what

[0009]

The constitution of the present invention made to achieve the above object is as follows.

That is, according to the present invention, a cell in which a liquid crystal is sandwiched between a pair of substrates on which electrodes are formed is attached to a cell via a supporting member having elasticity to cover the cell. In a liquid crystal device having a glass plate provided, a support frame bonded to the glass plate, and a main frame connected to the support frame, a stress wave transmitted from the main frame to the cell is bypassed. In the liquid crystal device, the supporting member is dispersedly provided in a region apart from a connecting portion between the supporting frame and the main frame so as to increase a transmission distance of the stress wave. is there.

According to the present invention, it is possible to remove the stress wave transmitted from the main frame to the cell in a short transmission distance (that is, the stress wave which is not sufficiently attenuated). That is, in the present invention, the support member for fixing the glass plate and the cell is provided with the support frame and the main frame so as to bypass the stress wave transmitted from the main frame to the cell and thereby increase the transmission distance of the stress wave. By disperse the stress waves transmitted from the main frame to the cells, the stress waves transmitted to the cells can be diverted and the transmission distance can be lengthened by disperse the stress waves transmitted to the cells sufficiently. be able to. As a result, it is possible to more reliably prevent the occurrence of alignment defects in the liquid crystal cell due to the impact of the main frame.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a support member for fixing a glass plate and a cell is provided so as to bypass the stress wave transmitted from the main frame to the cell and thereby increase the transmission distance of the stress wave. , Are provided dispersedly in a region away from the connecting portion between the support frame and the main frame.

As the elastic support member used in the present invention, for example, rubber or gel can be used.
Further, as the cross-sectional shape, any shape other than a rectangle or a circle can be selected, but when the supporting member is locally provided only in the vicinity of four corners of the cell, for example,
Since the rigidity of the entire supporting member is insufficient and the supporting member is apt to be excessively deformed when a stress wave is transmitted, it is preferable to use a member having a geometrical rigidity to prevent this.

In the present invention, the shape of the hole provided in the vicinity of the connecting portion of the support frame with the main frame is not particularly limited, and may be any shape other than, for example, a rectangle or an oval. You can The size of the hole is set so that the stress wave transmitted from the main frame to the cell can be bypassed and the transmission distance can be made sufficiently long, and the stress wave transmitted to the cell can be sufficiently attenuated. It

In the present invention, the type of liquid crystal used in the cell is not particularly limited, but since ferroelectric liquid crystal is likely to change its orientation due to shock or vibration, the present invention is significantly applied. .

[0016]

EXAMPLES Examples of the present invention will be specifically described below.

(Embodiment 1) FIGS. 1 and 2 are a vertical sectional view and a plan view showing the structure of a liquid crystal device according to the present embodiment, respectively.

As shown in FIG. 1, the liquid crystal device according to the present embodiment mainly includes a cell 1, a glass plate 2, a support frame 3, an elastic support member 5, and a main frame 11 in which a backlight 10 is housed. It is configured.

The support frame 3 and the main frame 11 are the same as those shown in FIGS. 9 and 10, respectively, and can be connected by screwing or the like as shown in FIG.

The support frame 3 and the glass plate 2 are attached to each other at their abutting surfaces with an adhesive to form a front frame 4.
Are configured.

The cell 1 is constructed by sandwiching a ferroelectric liquid crystal between two glass substrates. The cell 1 and the glass plate 2 are connected to each other through a supporting member 5 which is adhered to each other with an adhesive. As shown in FIG. 2, the support members 5 are dispersed in a region distant from the connection portion 12 between the support frame 3 and the main frame 11, and the cell 1
It is provided along the outer periphery of, and in this embodiment,
As the support member 5, rubber having a rectangular cross section was used.

After the cell 1, the glass plate 2 and the support frame 3 are bonded together as described above, the support frame 3 is attached to the backlight 1.
A liquid crystal device was constructed by connecting to the main frame 11 in which 0 was stored.

In the liquid crystal device of the present embodiment, when a shock is applied to the main frame 11, a stress wave is a connecting portion 12 at a fixed position of the support frame 3 with respect to the main frame 11.
From the support frame 3 to the glass plate 2
And is finally transmitted to the cell 1 via the supporting member 5 having elasticity. At this time, the stress wave is attenuated in the process of transmission, and the rate of attenuation increases as the distance of the transmission path increases.

In this embodiment, as shown in FIG. 2, since the supporting member 5 is not installed in the vicinity of the connecting portion 12,
The stress wave cannot be linearly transmitted from the connection portion 12 to the cell 1 with a short transmission distance, and is bypassed and transmitted to the cell 1 via the support member 5. Therefore, the stress wave transmitted to the cell 1 without being sufficiently attenuated can be eliminated, and as a result, the occurrence of alignment defects of the liquid crystal is suppressed.

(Embodiment 2) FIGS. 3 and 4 are a vertical sectional view and a plan view, respectively, showing the structure of a liquid crystal device according to this embodiment, and those having the same reference numerals as those in FIGS. The same members are shown.

The support frame 3 and the main frame 11 are similar to those shown in FIGS. 9 and 10, respectively, and can be connected by screwing or the like as shown in FIG.

The support frame 3 and the glass plate 2 are attached to each other at their abutting surfaces with an adhesive to form a front frame 4.
Are configured.

The cell 1 is constructed by sandwiching a ferroelectric liquid crystal between two glass substrates. The cell 1 and the glass plate 2 are connected to each other through a supporting member 5 which is adhered to each other with an adhesive. As shown in FIG. 4, the support members 5 are provided at the four corners of the cell 1. In this embodiment, rubber having a shape as shown in FIG. 5 was used as the support member 5. Incidentally, FIG. 5 (a)
Is a cross-sectional view, and FIG. 5B is a plan view.

In this embodiment, since the supporting members 5 are locally provided at the four corners of the cell 1 which are separated from the connecting portion 12, the stress wave when a shock is applied to the main frame 11 is generated by the connecting portion. It cannot be linearly transmitted from 12 to the cell 1 with a short transmission distance, and is bypassed and transmitted to the cell 1 via the support member 5. Therefore, the cell 1 is not attenuated enough.
It is possible to eliminate the stress wave that is transmitted to, and as a result, the occurrence of alignment defects in the liquid crystal is suppressed.

When the support member 5 is locally provided as in this embodiment, when the support member 5 as a whole lacks in rigidity and a stress wave is transmitted from the front frame 4, the support member 5 becomes excessive. There is a risk of deformation such as interference between the cell 1 and the front frame 4, but in this embodiment, by using the supporting member 5 having a shape having geometric rigidity as shown in FIG.
This risk is avoided.

(Embodiment 3) FIG. 6 is a vertical sectional view showing the structure of a liquid crystal device according to this embodiment, and the same reference numerals as those in FIG. 1 denote the same members. The liquid crystal device of the present embodiment is the same as that of the first embodiment except that the glass plate 2 and the support frame 3 are provided on both upper and lower surfaces of the cell 1, and therefore detailed description thereof will be omitted.

The structure of this embodiment has the effect of further suppressing the occurrence of alignment defects in the liquid crystal in the cell 1.

[0033]

As described above, according to the present invention,
The support member 5 for fixing the glass plate 2 and the cell 1 to each other so as to divert the stress wave transmitted from the main frame 11 to the cell 1 and thereby to extend the transmission distance of the stress wave, the support frame 3 and the main frame. By dispersely providing the areas 11 away from the connection portion 12, the stress waves transmitted from the main frame to the cells can be detoured and the transmission distance can be lengthened. As a result, the stress wave transmitted to the cell can be sufficiently attenuated, and the occurrence of the alignment defect of the liquid crystal cell due to the impact of the main frame can be more reliably prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a structure of a liquid crystal device according to a first embodiment of the invention.

FIG. 2 is a plan view showing the structure of the liquid crystal device according to the first embodiment of the invention.

FIG. 3 is a vertical sectional view showing a structure of a liquid crystal device according to a second embodiment of the invention.

FIG. 4 is a plan view showing a structure of a liquid crystal device according to a second embodiment of the invention.

FIG. 5 is a diagram showing a support member used in a liquid crystal device according to a second embodiment of the invention.

FIG. 6 is a vertical sectional view showing a structure of a liquid crystal device according to a third embodiment of the invention.

FIG. 7 is a vertical cross-sectional view showing the structure of a conventional liquid crystal device.

FIG. 8 is a plan view showing a structure of a conventional liquid crystal device.

FIG. 9 is a plan view showing a support frame used in the liquid crystal device.

FIG. 10 is a plan view showing a main frame used in a liquid crystal device.

FIG. 11 is a perspective view showing a connection state between a support frame and a main frame in the liquid crystal device.

[Explanation of symbols] 1 cell 2 glass plates 3 support frames 4 Front frame 5 Support members 6 holes 10 backlight 11 mainframe 12 Connection

Claims (3)

(57) [Claims] 1. A cell in which a liquid crystal is sandwiched between a pair of substrates on which electrodes are formed, and a glass which is attached to the cell via a supporting member having elasticity to cover the cell. A plate and a supporting frame attached to the glass plate,
A liquid crystal device having a main frame connected to the support frame, wherein the support member is configured to divert a stress wave transmitted from the main frame to the cell, thereby increasing a transmission distance of the stress wave. The liquid crystal device is provided in a distributed manner in a region apart from the connecting portion between the support frame and the main frame. 2. The liquid crystal device according to claim 1, wherein the supporting member is provided near four corners of the cell. 3. The liquid crystal device according to claim 2, wherein the support member has a shape having geometric rigidity.