JP3108596B2 - Liquid crystal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding a liquid crystal display device with a cushioning material.

[0002]

2. Description of the Related Art FIG. 4 shows a structure for holding a liquid crystal panel 10 in a conventional liquid crystal display device 11. As shown in FIG. In FIG. 4, a spacer 14 made of a cushioning material such as silicon rubber is adhered to the liquid crystal panel holding portion of the liquid crystal panel 10 and the support frame 12 as the lower case, and a front case 16 as the upper case. A spacer 15 made of a cushioning material such as silicon rubber having a different shape from the spacer 14 is attached to a position facing the spacer 14. The liquid crystal display device 11 is completed by inserting the liquid crystal panel 10 along the positioning protrusions 13 of the support frame 12 and mounting the front case 16 from above. The spacers 14 and 15 reduce the displacement of the liquid crystal panel 10 and the stress due to vibration, impact, and the like.

FIG. 5 shows a structure for holding a liquid crystal panel 10 in another conventional liquid crystal display device 21. FIG. 5 shows the positioning projections 23 in order to prevent rattling due to a gap between the liquid crystal panel 10 and the positioning projections 23 in addition to the spacers 14 and 15 shown in FIG.
A spacer 27 made of a cushioning material such as silicon rubber is adhered to the spacer.

FIG. 6 shows a structure for holding a liquid crystal panel 10 in another conventional liquid crystal display device 31. In FIG. 6, instead of attaching the spacer 27 for preventing rattling shown in FIG. 5, a ring-shaped spacer 38 made of a cushioning material such as silicon rubber is provided on the positioning protrusion 33 of the support frame 32. I am wearing it.

Japanese Patent Laid-Open Publication No. 3-47586 discloses a method in which a liquid crystal panel is held on a display window frame without being displaced by a hook-shaped projection having a spring property.

The technique described in Japanese Utility Model Laid-Open No. 3-47586 will be described below. FIG. 7 is a plan view of the liquid crystal panel holding device, and FIG. 8 is a sectional view taken along the line AA of FIG. When the liquid crystal panel 41 is pressed down and inserted into the display window frame 40 from above, the side surface of the liquid crystal panel 41 comes into contact with the engaging claw 46, and the elastic pressing piece 45 is elastically deformed toward the inner wall side (outside) of the display window frame 40.

Further, when the liquid crystal panel 41 is continuously pushed downward, when the liquid crystal panel 41 exceeds the leading end of the engaging claw 46, the elastic pressing piece 45 is elastically restored to the inside, and at the same time, the liquid crystal panel 41 The lower surface is placed on the projection 47, and the upper surface of the liquid crystal panel 41 is engaged with the engaging claw 46 from above.

[0008]

However, the above-mentioned conventional liquid crystal display device has several problems to be solved. The conventional liquid crystal display devices 11 and 2 shown in FIGS.
In Nos. 1 and 31, when the spacers 14, 24, 34 and 15, 25, 35 are pasted, the pasting position is shifted, and further, if the environmental conditions become high temperature, the pasting strength decreases, and the pasted spacer 14 , 24, 34 and 15, 25, 35 are displaced.

Further, since the positioning projections 13, 23, 33 are completely integrated with the support frames 12, 22, 32, a temperature change causes a difference in thermal deformation between the support frames 12, 22, 32 and the liquid crystal panel 10. However, there is a problem that the reliability of positioning is reduced.

In addition, the positioning projection 1 is caused by a drop impact.
The impact force generated at 3, 23, 33 is directly applied to the liquid crystal panel 10.
In addition, there is also a problem that the liquid crystal display device is deformed and the reliability of the device itself is impaired. In order to prevent rattling due to a gap between the liquid crystal panel 10 and the positioning projections 23, 33, a method of attaching a spacer 27 to the positioning projection 23 or attaching a ring-shaped spacer 38 to the positioning projection 33 is adopted. In combination,
Positioning the liquid crystal panel 10 with the positioning projections 2 of the support frames 22 and 32
When the liquid crystal panel 10 is inserted along the corners 3 and 33, the corners of the liquid crystal panel 10 and the corners of the spacers 27 and 38 come into contact with each other.
8 has a problem that the connection portion with the liquid crystal panel 10 is peeled off.

The hook-shaped projections having spring properties shown in FIGS. 7 and 8 are degraded with time to prevent deterioration of the spring properties, warpage as a material of the display window frame, and improvement of strength. For example, when a hard material such as a glass-reinforced material is used, there is a problem that sufficient spring properties cannot be obtained.

The present invention has been made to solve the above-mentioned problems, and can position and hold the liquid crystal panel 10 with a simple structure, can prevent rattling, and can prevent heat applied to the liquid crystal panel 10. It is an object of the present invention to provide a highly reliable liquid crystal display device that reduces stress such as mechanical shock or vibration or impact.

[0013]

According to the present invention, there is provided a liquid crystal display device comprising a liquid crystal panel held between upper and lower cases via a holding member made of a cushioning material.
Is paired with a chamfer formed on the periphery of the liquid crystal panel .
A liquid crystal display device characterized in that the chamfered portion is pressed by a facing surface .

[0014]

[0015]

[0016]

According to the present invention, the holding member attached to the front case is made of a cushioning material such as silicon rubber, and the liquid crystal panel is chamfered vertically and horizontally to hold the liquid crystal panel by pressing it. Since there are no spacers around the positioning projections provided on the LCD panel, the LCD panel can be easily inserted into the support frame, and the LCD panel can be positioned and held in the vertical and horizontal directions. Can be prevented, and furthermore, stress on the liquid crystal panel due to thermal shock, vibration, impact, or the like can be reduced, and a highly reliable liquid crystal display device can be provided.

The holding member has a surface facing the chamfered portion of the liquid crystal panel, so that the chamfered portion at the peripheral portion of the liquid crystal panel can be pressed uniformly, and the liquid crystal panel can be stably held.

Further, a groove is formed on a surface (sticking surface) of the support frame and the front case that faces the holding member, thereby preventing a shift of the holding member from being stuck, a temperature change, and an external stress. Thus, the liquid crystal panel can be stably held.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A holding structure of a liquid crystal display device 1 according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a cross section of a holding structure of the liquid crystal display device 1 according to the present embodiment, FIG. 2 is a diagram showing a plane, a front and a cross section of a front case, and FIG. It is.

As shown in FIG. 1, the liquid crystal display device 1 has a liquid crystal panel 10, a support frame 2 as a lower case for supporting the liquid crystal panel 10, and a liquid crystal panel positioning projection formed on the support frame 2. 3, a holding member 4 for holding the liquid crystal panel 10, and a front case 6 which is an upper case for protecting the inside of the device.

The holding members 4 and 5 can be positioned and held, can prevent rattling, and can alleviate stress on the liquid crystal panel 10 due to heat, vibration, impact, and the like. A material such as rubber or plastic having a function as the above can be used, and among them, silicon rubber is preferably used.

As shown in FIG. 3, the holding member 4 is
Liquid crystal panel 10 so as to fit into groove 2a provided in
The holding member 4 is attached to a portion corresponding to the peripheral edge of. The attachment position of the holding member 4 may be provided not only on the entire circumference of the liquid crystal panel 10 but also on at least two opposing sides of the four sides of the liquid crystal panel.

The support frame is generally made of a material such as plastic such as polycarbonate, and is formed by molding. The groove 2a is also formed by the molding process.

The liquid crystal panel 10 is inserted into the support frame 2 along the liquid crystal panel positioning projections 3 formed on the support frame 2.

As shown in the plan view and the sectional view of FIG. 2, the holding member 5 is attached so that the holding member 5 fits into the groove 6a provided in the vertical and horizontal plane inside the front case 6. The attachment position of the holding member 5 may be provided not only on the periphery of the liquid crystal panel 10 but also on at least two opposing sides of the four sides of the liquid crystal panel. The shape of the holding member 5 is such that the surface 5a that comes into contact with the chamfered portion 10a of the peripheral portion of the liquid crystal panel 10
Are formed.

The front case 6 is generally made of a thin sheet metal such as a zinc iron plate or stainless steel, and is manufactured by a process such as pressing. The groove 6a is also formed by the pressing process. Alternatively, the groove 6a is formed as a post-processing by a cutting process such as milling.

The front case 6 may be made of a material such as plastic, and is formed by molding. The groove 6a is also formed by the molding process.

The front case 6 to which the holding member 5 is attached is mounted from above the liquid crystal panel 10 inserted in the support frame 2, and the liquid crystal display device 1 is completed. At this time, one surface 5 of the holding member 5
a holds the liquid crystal panel by pressing the chamfered portion 10a of the liquid crystal panel 10 vertically and horizontally.

When the front case 6 is mounted, the holding member 4 made of a cushioning material such as silicon rubber attached to the front case 6 presses and holds the liquid crystal panel chamfered portion 10a vertically and horizontally. It is possible to prevent rattling due to a gap between the liquid crystal panel 10 and the liquid crystal panel positioning projection 3.

That is, the liquid crystal panel 10 can be positioned and held in the vertical and horizontal directions, and rattling can be prevented.

Further, stress on the liquid crystal panel 10 due to thermal shock, vibration, impact, or the like can be reduced, and the liquid crystal display device 1 with high reliability can be provided. Further, since the holding member 5 has the surface 5a which is in contact with the liquid crystal panel chamfered portion 10a, the liquid crystal panel chamfered portion 10a is pressed uniformly.

Further, since the grooves 2a and 6a are formed on the surfaces of the support frame 2 and the front case 6 where the holding members 4 and 5 are to be stuck, positional deviation when the holding members 4 and 5 are stuck,
A positional shift due to a temperature change, an external stress, or the like is prevented, and a stable holding of the liquid crystal panel becomes possible.

[0033]

As described above, according to the present invention, the liquid crystal panel can be smoothly inserted at the time of assembly, the liquid crystal panel can be positioned and held in the vertical and horizontal directions, and rattling can be prevented. be able to. Further, stress on the liquid crystal panel due to thermal shock, vibration, impact, or the like can be reduced, and a highly reliable liquid crystal display device can be provided.

Further, the chamfered portion at the periphery of the liquid crystal panel can be pressed uniformly, and the liquid crystal panel can be stably held and a highly reliable liquid crystal display device can be provided.

Further, it is possible to prevent displacement of the attaching position of the holding member, displacement of temperature, external stress, and the like.
A highly reliable liquid crystal display device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a liquid crystal display device of the present invention.

FIG. 2 is a plan view (a), a front view (b), and a cross-sectional view (c) of a front case of the liquid crystal display device of the present invention.

FIG. 3 is a plan view of a support frame of the liquid crystal display device of the present invention.

FIG. 4 is a cross-sectional view of a first conventional liquid crystal display device.

FIG. 5 is a sectional view (a) of a second conventional liquid crystal display device and a perspective view (b) of a spacer.

FIG. 6 is a sectional view (a) of a third conventional liquid crystal display device and a perspective view (b) of a spacer.

FIG. 7 is a plan view of a fourth conventional liquid crystal panel holding device.

FIG. 8 is a sectional view of the conventional liquid crystal panel holding device shown in FIG. 7;

DESCRIPTION OF REFERENCE NUMERALS 1 liquid crystal display device 2 support frame 2a groove 3 positioning projection 4 holding member 5 holding member 5a one surface of holding member 6 front case 6a groove 10 liquid crystal panel 10a chamfered portion of liquid crystal panel 11 21 31 liquid crystal display device 12 22 32 Support frame 13 23 33 Positioning projection 14 24 34 Spacer 15 25 35 Spacer 16 26 36 Front case 17 27 Spacer 38 Spacer 40 Display window frame 41 Liquid crystal panel 45 Elastic pressing piece 46 Engagement claw 47 Projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1333

Claims (1)

(57) [Claims] 1. A liquid crystal display device comprising a liquid crystal panel sandwiched between two upper and lower cases via a holding member made of a cushioning material, wherein the holding member is a chamfer formed at a peripheral portion of the liquid crystal panel. A liquid crystal display device, wherein the chamfered portion is pressed by a surface facing the liquid crystal display.