JPH0933898A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an extra force applied to the connection part between a liquid crystal panel and a liquid crystal driving element and maintain the reliability of the connection part between the liquid crystal panel and liquid crystal driving element by fixing a buffer material to a frame body along the peripheral part of the liquid crystal panel. SOLUTION: The buffer memory 20 is fixed not only on the side of a liquid crystal panel assembly 2, but on the side of the frame body 4. Consequently, when the buffer member 20 is fitted or removed, the force is applied to the frame body 4 and not applied to the connection part between the liquid crystal panel 5 and liquid crystal driving element 7, so the reliability of the connection part between the liquid crystal panel 5 and liquid crystal driving element 7 can be maintained. Further, the frame body 4 is given a mark for buffer member fixation corresponding to the peripheral part of the liquid crystal panel 5 and the buffer member 20 is fixed to the frame body 4 according to the mark. Consequently, the buffer member 20 can be positioned accurately at the peripheral part of the liquid crystal panel 5 or at the connection part between the liquid crystal panel 5 and liquid crystal driving element 7 by using the mark, and the liquid crystal panel 5 can be protected against an external shock.

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 having a buffer member arranged between a liquid crystal panel and a frame.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, a liquid crystal panel assembly constituted by disposing liquid crystal driving elements and a circuit board in the peripheral portion of the liquid crystal panel is housed in a frame body and a buffer is provided between the liquid crystal panel and the frame body. The members are arranged. Since this cushioning member is fixed to the front and back peripheral portions of the liquid crystal panel, it is necessary to turn the liquid crystal panel assembly over and carry it to a predetermined position when fixing the liquid crystal panel. Excessive force is likely to be applied to the connection part of the liquid crystal drive element. Further, at the side where the liquid crystal driving element is connected on the front surface or the back surface of the liquid crystal panel, the buffer member is fixed on or near the connection portion with the liquid crystal driving element, so that the mounting work or repair / Unnecessary force is likely to be applied to the connection between the liquid crystal drive element and the liquid crystal panel during the removal work accompanying the inspection. In particular, in recent years, the pitch and width of the wiring have become shorter along with the miniaturization of the overall shape of the liquid crystal drive element due to the demand for narrower frame of the liquid crystal display device, and the situation where the connection area between the liquid crystal panel and the liquid crystal drive element cannot be sufficiently secured. Therefore, it is preferable to have a structure in which an excessive force is not applied to the connecting portion in order to improve reliability.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a structure in which an excessive force is not applied to a connecting portion between a liquid crystal panel and a liquid crystal driving element, and a predetermined reliability can be maintained even when a frame is narrowed. An object of the present invention is to provide a liquid crystal display device that can be used.

[0004]

According to the present invention, a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a buffer member is provided between the liquid crystal panel and the frame body. In the arranged liquid crystal display device, the buffer member is fixed to the frame body along the peripheral portion of the liquid crystal panel.

Further, according to the present invention, a liquid crystal display device is provided in which a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a buffer member is arranged between the liquid crystal panel and the frame body. In the above aspect, a mark for fixing a cushioning member is provided on the frame body along the peripheral portion of the liquid crystal panel, and the cushioning member is fixed to the frame body along the mark.

Further, according to the present invention, a liquid crystal display device is provided in which a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a buffer member is arranged between the liquid crystal panel and the frame body. In the above, the frame body is provided with a mark for fixing a buffer member corresponding to a connecting portion between the liquid crystal panel and the liquid crystal drive element, and the buffer member is fixed to the frame body along the mark. .

[0007]

According to the present invention, since the cushioning member is fixed to the frame body along the peripheral portion of the liquid crystal panel, an extra force due to the fixing work of the cushioning member is applied to the frame body. As a result, it is possible to reduce the extra force applied to the connecting portion between the liquid crystal panel and the liquid crystal driving element, and maintain the reliability of the connecting portion between the liquid crystal panel and the liquid crystal driving element.

Further, according to the present invention, a mark for fixing a buffer member is provided on the frame body along the peripheral portion of the liquid crystal panel or the connection portion of the liquid crystal driving element, and the buffer member is fixed to the frame body along the mark. Therefore, by applying an extra force associated with the work of fixing the buffer member to the frame body, the extra force applied to the connecting portion between the liquid crystal panel and the liquid crystal drive element is reduced, and the buffer member is attached to the peripheral portion of the liquid crystal panel by the mark. Alternatively, the liquid crystal driving element can be accurately positioned at the connecting portion, and the connecting portion can be effectively protected by the cushioning member.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The liquid crystal display device 1 is mainly composed of a liquid crystal panel assembly 2, a surface lighting device 3, and a frame body 4 that houses them.
As shown in FIG. 4, it has a planar rectangular shape. 1 is an enlarged sectional view taken along the line AA of FIG. 4, FIG. 2 is an enlarged sectional view taken along the line BB of FIG. 4, and FIG. 3 is an enlarged sectional view taken along the line BB of FIG. 4 showing another embodiment.

The liquid crystal panel assembly 2 includes a liquid crystal panel 5, a plurality of circuit boards 6 arranged around the liquid crystal panel 5 so as to face two to four sides of the liquid crystal panel 5, and the liquid crystal panel 5.
And a plurality of liquid crystal drive elements 7 connected between the circuit board 6 and the circuit board 6. The liquid crystal panel 5 includes two transparent substrates 8 and 8 each having a plurality of transparent electrodes on opposite surfaces.
Liquid crystal is sealed in between, and polarizing plates 9 and 9 are arranged so as to sandwich the transparent substrates 8 and 8 as necessary.
The transparent electrode extends to the terminal portion 10 located at the edge of the transparent substrate 8 and a part thereof is exposed, and the output terminal portion of the liquid crystal drive element 7 is bonded to the exposed transparent electrode by an anisotropic conductive adhesive or the like. It is connected by heating and pressurizing it through the agent. Liquid crystal drive element 7
Is a so-called TCP (tape carrier package) configured by providing a film-shaped base material with a predetermined electric wiring pattern and arranging an IC element for driving a liquid crystal in the center thereof. The liquid crystal panel 5 having different shapes on the long side and the short side is used. The input terminals of the liquid crystal drive element 7 are connected to the circuit board 6 by solder or anisotropic conductive adhesive.

The surface lighting device 3 includes a linear light source 11 composed of a cold cathode tube and the like, and a light guide plate 12 having the light source arranged on its side surface.
And is housed and held in the frame body 4. A light reflection sheet 13 is arranged around the linear light source 11 with a predetermined interval if necessary, and a light diffusion sheet 14 and a light reflection sheet 15 are laminated on the upper and lower surfaces of the light guide plate 12 as necessary. It is desirable to do.

The frame 4 is located at the upper, middle, and lower stages 3
With one frame 16, 17 and 18, upper frame 16 and middle frame 1
The liquid crystal panel assembly 2 is positioned and held between 7, and the lighting device 3 is positioned and held between the middle frame 17 and the lower frame 18. The upper frame 16 and the lower frame 18 are suitable for thinning,
Further, the upper frame 16 is made of a high-strength member, preferably a metal frame made of iron, aluminum alloy, stainless steel, or the like, and an opening for making the display surface of the liquid crystal panel 5 desired is formed at the center. At the same time, a locking piece 1 for locking the storage component by locking with the middle frame 17 or the lower frame 18
9 is provided in the peripheral portion. The middle frame 17 is made of a member that is lightweight and has a predetermined strength and is easily processed into an arbitrary shape, preferably a resin frame made of synthetic resin. An opening for making the light emitting surface of the light guide plate 12 desired is formed at the center of the middle frame 17.

Between the liquid crystal panel 5 and the frame 4, a plurality of cushioning members made of a soft synthetic resin having a predetermined elasticity, preferably silicon rubber or natural rubber, is provided in order to absorb a shock applied to the liquid crystal panel 5. Twenty are arranged. The buffer member 20 is positioned so as to correspond to the peripheral portion of the liquid crystal panel 5, preferably the four sides of the front and back surfaces, and the frame member 4 is provided.
It is fixed by adhesive. In particular, in the peripheral portion on the front or back surface of the liquid crystal panel 5 to which the liquid crystal drive element 7 is connected, the liquid crystal panel 5 and the liquid crystal drive device are driven so that the buffer member 20 covers the connection portion of the liquid crystal drive element 7 with the liquid crystal panel 5. The buffer member 20 is adhesively fixed to the frame body 4 along the connecting portion of the element 7. The thickness of the cushioning member 20 is slightly different depending on the mounting location.

In order to accurately position the cushioning member 20, the upper frame 16 and the middle frame 17 are provided with predetermined marks corresponding to the fixing positions of the cushioning member 20. On the back surface of the upper frame 16 generally composed of a metal frame,
As one of the above-mentioned marks, a step 21 is formed at the edge of the upper frame 16 desired on the display surface, and the edge of this step is set as the fixed fixing position of the buffer member 20, and as another one of the marks, when processing a metal frame. A stamp (not shown) that represents the outer shape of the cushioning member 20 is provided so as to hardly change the thickness of the upper frame 16, thereby indicating the planned fixing position of the cushioning member 20. It is also possible to provide other marks on the upper frame 16. For example, as a mark indicating the planned fixing position of the cushioning member 20, printing different from the color of the upper frame 16 is performed so as to represent the contour of the cushioning member 20, or the same groove (bit) as the contour of the cushioning member 20 is formed by step pressing. -) May be provided, or a predetermined number of small through holes may be formed. In terms of being easily formed, steps, markings, marks of grooves and small through holes are preferable, markings that do not increase the thickness of the frame are preferable, markings of printing and small through holes, and in terms of ease of confirmation,
Markings for printing, grooves and small through holes are preferred.

The buffer member 2 is provided on the upper surface of the middle frame 17.
As one of the marks indicating the fixed fixing position of 0, the cushioning member 2
A rib 22 having a predetermined height having a width similar to that of 0 is provided along the length of the cushioning member 20, and the upper edge 24 of the middle frame 17 is used as another one of the marks. Instead of the rib 22, as shown in FIG. 3, a groove 23 having a predetermined depth into which the cushioning member 20 is fitted can be provided along the length of the cushioning member 20. Since the middle frame 17 is not so thick, it is preferable to use the rib 22 as a mark because the strength can be maintained rather than the groove 23 as a mark. Further, as a mark indicating the planned fixing position of the cushioning member 20, it is also possible to provide a marking, a print, a small hole or the like on the middle frame 17 as well as the mark on the upper frame 16. In terms of simplification, the upper edge of the intermediate frame 17 is used, and when the intermediate frame 17 is a synthetic resin frame, the rib 22 is a mark because it can be easily formed and checked and the strength can be maintained. Is preferred.

Since the cushioning member 20 is fixed to the frame body 4 side instead of the liquid crystal panel assembly 2 side in this way, the cushioning member 20 is fixed.
Since the force applied during the mounting work or the removing work is applied to the frame body 4 and not to the connecting portion between the liquid crystal panel 5 and the liquid crystal drive element 7, the reliability of the connecting portion between the liquid crystal panel 5 and the liquid crystal drive element 7 is improved. Can be maintained. Also,
Since a mark for fixing the buffer member is provided on the frame body 4 corresponding to the peripheral portion of the liquid crystal panel 5, and the buffer member 20 is fixed to the frame body 4 along this mark, the buffer member 20 of the liquid crystal panel 5 is fixed by the mark. The liquid crystal panel 5 can be accurately positioned at the peripheral portion or the connecting portion between the liquid crystal panel 5 and the liquid crystal driving element 7, and the liquid crystal panel 5 can be protected from external impact. Further, the cushioning member 20 is accurately positioned at the connecting portion between the liquid crystal panel 5 and the liquid crystal driving element 7, and the connecting portion is covered with the cushioning member 20, whereby sufficient protection can be achieved.

The cushioning members 20 supporting the upper and lower surfaces of the liquid crystal panel are most preferably fixed to the frame body 4, respectively, but the cushioning member supporting one surface of the liquid crystal panel 5 is fixed to the liquid crystal panel 5 in advance. Alternatively, the cushioning member corresponding to the other surface may be fixed to the frame body 4.

[0018]

As described above, according to the present invention, since the cushioning member is fixed to the frame body along the peripheral portion of the liquid crystal panel, an extra force accompanying the fixing work of the cushioning member is applied to the frame. As a result, it is possible to reduce the extra force applied to the connecting portion between the liquid crystal panel and the liquid crystal driving element, and maintain the reliability of the connecting portion between the liquid crystal panel and the liquid crystal driving element.

Further, according to the present invention, the frame member is provided with a mark for fixing the buffer member along the peripheral portion of the liquid crystal panel or the connection portion of the liquid crystal driving element, and the buffer member is fixed to the frame member along the mark. Therefore, by adding an extra force accompanying the fixing work of the cushioning member to the frame, while reducing the extra force applied to the connecting portion of the liquid crystal panel and the liquid crystal drive element, the cushioning member by the mark, the peripheral portion of the liquid crystal panel, Alternatively, the liquid crystal driving element can be accurately positioned at the connection portion, and the connection portion can be effectively protected by the cushioning member.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a main part (AA in FIG. 4) of a liquid crystal display device showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part (BB in FIG. 4) of the liquid crystal display device showing the embodiment of the present invention.

FIG. 3 is a main part showing another embodiment of the present invention (BB in FIG. 4).
It is an expanded sectional view.

FIG. 4 is a plan view of a liquid crystal display device showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Liquid crystal panel assembly 4 Frame 5 Liquid crystal panel 6 Circuit board 7 Liquid crystal drive element 20 Buffer member 21 Step 22 Rib 23 Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiaki Nakayama 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Koichi Hamada 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Sanyo Denki Incorporated (72) Inventor, Yuichi Tsubaki, Tottori Prefecture, Tottori City, Minamiyoshikata 3-chome 201 Tottori Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A liquid crystal display device in which a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a buffer member is arranged between the liquid crystal panel and the frame body. A liquid crystal display device, wherein a cushioning member is fixed to the frame body along the peripheral portion of the liquid crystal panel. 2. A liquid crystal display device in which a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a cushioning member is arranged between the liquid crystal panel and the frame body. A liquid crystal display device, wherein a mark for fixing a cushioning member is provided on the frame body along the peripheral portion of the liquid crystal panel, and the cushioning member is fixed to the frame body along the mark. 3. A liquid crystal display device in which a liquid crystal panel and a liquid crystal driving element connected to a peripheral portion of the liquid crystal panel are housed in a frame body, and a buffer member is arranged between the liquid crystal panel and the frame body. A liquid crystal display device characterized in that a mark for fixing a buffer member is provided on a frame body corresponding to a connecting portion between the liquid crystal panel and the liquid crystal drive element, and the buffer member is fixed to the frame body along the mark. .