JP3466459B2 - 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 the structure of a liquid crystal display device.

[0002]

2. Description of the Related Art A liquid crystal display device used as a display portion of various electronic devices generally includes a liquid crystal panel which serves as a display portion, a light guide plate for uniformly illuminating the liquid crystal panel from the back surface, and a resin for holding them. It is equipped with a holding frame made of. Figure 3
FIG. 3 is a perspective view showing a configuration of a general liquid crystal display device.
In the figure, 1 is a glass LCD panel which is a liquid crystal panel, 2 is a resin holding frame, and the glass LCD panel 1 is placed on this and holds the peripheral edge and four sides. A metal front frame 3 holds the glass LCD panel 1 from the side opposite to the holding frame 2 of the glass LCD panel 1, and regulates the vertical movement of the panel display surface. The holding frame 2 and the front frame 3 are attached by fixing means such as tabs or screws provided on both.

With the recent reduction in size and weight of various electronic devices using liquid crystal display devices, the glass and light guide plate used in the glass LCD panel 1 have been made thinner, and the thickness of the holding frame 2 supporting them has been increased. It tends to be as thin as possible. Since the material of the glass LCD panel 1 is glass which is a brittle material, it is easily deformed without being deformed flexibly when an external force is applied. In addition, the light guide plate and the holding frame 2 are also easily damaged by a large external force caused by dropping or the like when the light guide plate and the holding frame 2 have a thin structure that places importance on downsizing and weight reduction. Particularly in the corners of each member, stress is likely to be concentrated and damage is likely to occur.

In order to prevent cracking and chipping due to stress concentration on the panel corners, the one disclosed in JP-A-6-273723 has been reported. FIG. 4 is a diagram of JP-A-6-
It is a perspective view which shows the liquid crystal display device described in 273723. In the figure, 1 is a glass LCD panel, 2
Is a holding frame for holding the peripheral edge and four sides of the glass LCD panel 1, and 4 is a printed circuit board for fixing the glass LCD panel 1 together with the holding frame 2. Reference numerals 5 are notches provided at the corners of the holding frame 2 at the four corners, and are formed so that the corners of the glass LCD panel 1 are exposed. Reference numeral 6 is a reinforcing portion that reinforces the corner portion of the holding frame 2 provided with the cutout portion 5.

[0005]

However, when the cutouts 5 are provided at the four corners as shown in FIG. 4, the holding frame 2 is thereby formed.
Since the strength of itself is reduced, the additional reinforcing portion 6 is required to secure sufficient strength. In this case, there is a problem that the size of the holding frame 2 increases, which hinders the reduction in size and weight required in recent electronic devices.

The present invention has been made to solve the above problems, and a first object thereof is to prevent the corner portion of the liquid crystal panel from being damaged and to hinder the strength of the holding frame for holding the liquid crystal panel. It is to obtain a liquid crystal display device having a holding frame with a unique structure. A second object is to obtain a liquid crystal display device having a holding frame having a structure in which the corner portion of the holding frame itself is not damaged.

[0007]

In the liquid crystal display device according to [Means for Solving the Problems] The present invention is arranged so as to surround the entire outer periphery of the flat liquid crystal panel having four sides inwards Rutotomoni extension
Has an extension portion which standing, a first holding frame configured Let 's you support the peripheral edge of the first surface of the liquid crystal panel by the extending portion, opposite to the first surface of the liquid crystal panel first A second holding frame that supports the peripheral edges of the second surface and is attached to the first holding frame is provided , and the first holding frame is positioned between the corners of the liquid crystal panel and the liquid crystal panel.
Form a clearance so that it does not contact the side of the flannel
It has been done. Further, the clearance portion corresponding to the corner of the liquid crystal panel is formed to be curved. In addition, the liquid whose periphery is supported by the first holding frame
The first side of the crystal panel is the side opposite to the display side of the liquid crystal panel
Is the aspect of.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a plan view showing a main part of a liquid crystal display device according to a first embodiment of the present invention. In the figure,
1 is a glass LC which is a flat liquid crystal panel having four sides
D panel, 8 is a holding frame made of resin or metal, glass L
It is formed so as to surround the entire outer circumference of the CD panel 1. 1
Reference numeral 2 denotes an extending portion that slightly extends from the vicinity of the lower surface of the entire circumference of the holding frame 8 toward the inside of the frame, and 10 is a panel holding portion that holds the four sides of the glass LCD panel 1 of the holding frame 8, and a clearance portion. The inner peripheral portion except 9 is formed. The glass LCD panel 1 is placed on the extending portion 12 of the holding frame 8, the peripheral edge of the lower surface which is the first surface is supported, and the four sides are held by the panel holding portion 10. Further, the front surface (not shown) which is the second holding frame is brought into contact with the upper surface which is the second surface, and the second frame is fixed by fixing this to the holding frame 8. Reference numeral 9 denotes clearance portions provided at corners at the four corners of the holding frame 8, and the clearances are formed between the glass LCD panel 1 and the glass frame in the range where the corner portions are not cut out. In order to maintain the strength of itself, the size of the clearance is formed to the minimum necessary.

In such a liquid crystal display device, the glass LC
The D panel 1 is attached to the holding frame 8 so as to support the peripheral edge and the four sides of the first surface, and the second frame is pressed by the front frame attached to the holding frame 8 so that the D panel 1 is placed inside the holding frame 8. Fixed. At this time, there is a preset clearance between the corner portion of the glass LCD panel 1 and the holding frame 8, and the corner portion of the glass LCD panel 1 and the holding frame 8 do not come into direct contact with each other.
When an impact such as a drop or an external force such as a twist is applied to the liquid crystal display device configured as described above, the holding frame 8 made of metal or resin and the front frame are deformed by their elasticity. Occurs.

At this time, the four corners of the glass LCD panel 1 do not come into direct contact with the holding frame 8 due to the clearance portions 9, so that external force does not act and the glass breaks in the corner portion where stress is usually most concentrated. Can be prevented. Also, if a shock or external force is applied to the liquid crystal display device,
By setting the clearance portion 9 to the required minimum value, the strength of the holding frame 8 itself does not decrease, and damage can be avoided. Since the clearance portion 9 is provided at the corner portion of the holding frame 8 as described above, it is possible to prevent the holding frame 8 and the glass LCD panel 1 from being damaged due to stress concentration on the corner portion. Moreover, since the clearance portion 9 is formed to the necessary minimum so as to maintain the strength of the holding frame 8, the holding frame 8 does not easily break.

Embodiment 2. 2 is a plan view showing a main part of a liquid crystal display device according to a second embodiment of the present invention.
In the figure, 1 and 8 to 10 are the same as those in FIG. 11 is a corner portion of the clearance portion 9, which is R
It is shaped and formed so as to secure a clearance with the glass LCD panel 1. Embodiment 2
In the liquid crystal display device, the corner portion 11 of the clearance portion 9 of the holding frame 8 has an R shape, so that when a shock or an external force acts on the liquid crystal display device, the stress at the corner portion 11 of the clearance portion 9 is reduced. It is dispersed and the holding frame 8 itself is not easily damaged.

[0012]

Since the present invention is constructed as described above, it has the following effects. It is arranged so as to surround the entire outer periphery of the liquid crystal panel suited inwardly Rutotomoni
Has an extension portion extending I, a first holding frame configured Let 's you support the peripheral edge of the first surface of the liquid crystal panel by the extending portion, a first surface of the liquid crystal panel opposite A second holding frame attached to the first holding frame while supporting the peripheral edge of the second surface on the side, and the first holding frame is provided between the corner of the liquid crystal panel.
Clearance part that does not touch the side part of the LCD panel
Since it is formed , the contact between the side surface of the corner of the liquid crystal panel and the first holding frame is prevented without impairing the strength of the first holding frame, and stress concentration on the corner of the liquid crystal panel is prevented. You can Further, since the clearance portion corresponding to the corner portion of the liquid crystal panel is formed to be curved, the strength of the first holding frame can be improved. Also, the first holding frame
The first side of the liquid crystal panel, whose peripheral edge is supported by
Since it is the surface opposite to the display surface of the crystal panel, the liquid crystal panel
The extension of the first holding frame along the peripheral edge of the surface opposite to the display surface.
It is placed and supported on the existing part and is exposed by the second holding frame.
The display surface can be fixed.

[Brief description of drawings]

FIG. 1 is a main part plan view showing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a main part plan view showing a liquid crystal display device according to Embodiment 2 of the present invention.

FIG. 3 is a perspective view showing a configuration of a general liquid crystal display device.

FIG. 4 is a perspective view showing a relationship between a liquid crystal panel and a holding frame having a notch in a corner portion of a conventional liquid crystal display device.

[Explanation of symbols]

1 glass LCD panel, 2,8 holding frame, 3 front frame, 9 clearance part, 10 panel holding part, 11 R shape, 12 extension part.

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Claims (3)

(57) [Claims] 1. A flat liquid crystal panel having four sides, Rutotomoni inwardly disposed so as to surround the entire outer periphery of the liquid crystal panel
Extending toward the have an extension portion, the first holding frame configured Let 's you support the peripheral edge of the first surface of the upper <br/> SL liquid crystal panel by the extending portion, the liquid crystal A second holding frame that supports a peripheral edge of a second surface opposite to the first surface of the panel and is attached to the first holding frame, the first holding frame is provided.
The side part of the liquid crystal panel between the corner of the liquid crystal panel
A liquid crystal display device, characterized in that a clearance portion is formed so as not to come into contact with the liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein a clearance portion corresponding to a corner portion of the liquid crystal panel is formed to be curved. 3. A peripheral edge is supported by the first holding frame.
The first surface of the liquid crystal panel is the display surface of the liquid crystal panel.
2. The surface opposite to the surface of claim 1 or 2.
The liquid crystal display device according to claim 2.