JPH11109878A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a frame-like body and the breakage of glass by providing a gap part between a liquid crystal panel and a rib, filling the gap part with a flexible resin having elasticity and sealing the gap part. SOLUTION: The gap part G is provided between the corner part and the rib parts 3a, 3b, 3c and 3d of the liquid crystal panel 1, and filld with the flexible resin 7a, 7b, 7c and 7d so as to cover the gap part and then sealed to fix the panel 1 to the frame-like body 2. Silicone resin whose elastic modulus Ea is 150 kg/mm<=Ea<=250 kg/mm is used as the resin 7b. Thus, thermal impact and mechanical impact applied to the liquid crystal display device are absorbed by the flexible resin 7a, 7b, 7c and 7d, so that the deformation of the body 2 and the breakage of the glass of the panel 1 are prevented. Even when the device is constituted in such a way, the display characteristic and the reliability of the liquid crystal display device and not changed at all and the device is excellently operated.

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 used for a display device such as a notebook type, a laptop type word processor, a personal computer, and a workstation.

[0002]

2. Description of the Related Art In recent years, display devices centering on liquid crystal, particularly active matrix display devices that drive liquid crystal using TFTs as switching elements, have rapidly penetrated the market, and are also used for OA and consumer applications. , Industrial and growing. Above all, the market for OA is large, and its application fields are expanding beyond the screens of personal computers to the screens of workstations.

Hereinafter, a conventional liquid crystal display device will be described with reference to the drawings. FIG. 3 is a plan view showing a bonding state between a liquid crystal panel and a frame made of synthetic resin in a conventional liquid crystal display device, and FIG. 4 is a partially enlarged view of FIG. In each figure, 1 is a liquid crystal panel, 2 is a frame, 3a, 3
b, 3c, 3d are rib portions of the frame-like body, 4a, 4b, 4c,
4d, 4e, and 4f are driving ICs for the liquid crystal panel 1;
5b is a printed circuit board, 6a, 6b, 6c, 6d, 6e,
6f is TCP. Thus, the liquid crystal panel 1 has the ribs 3a, 3b, 3c, 3 for holding the liquid crystal panel of the frame body 2.
d, the corners of the liquid crystal panel are usually fixed to the ribs 3a, 3b, 3c, 3d without gaps as shown in FIG.

[0004]

However, in such a configuration, deformation of the frame or cracking of the glass is caused by the difference in the thermal expansion coefficient between the glass forming the liquid crystal panel and the resin material forming the frame. In addition, when a mechanical shock is applied to the liquid crystal display device, the reliability of the liquid crystal panel is significantly reduced, for example, the liquid crystal panel is shocked and the glass is broken. Therefore, various measures have been taken to remove initial cracks that cause cracks, to reduce the coefficient of thermal expansion of the material of the frame, and to match the coefficient of thermal expansion of glass. There is a problem that leads to up.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal display device which has a simple structure and eliminates deformation of a frame-like body and breakage of glass of a liquid crystal panel.

[0006]

A liquid crystal panel having a liquid crystal layer held between a pair of electrode substrates, a liquid crystal panel driving IC electrically connected to the liquid crystal panel, and a liquid crystal panel driving IC. What is claimed is: 1. A liquid crystal display device comprising a printed circuit board having a control circuit for a liquid crystal panel connected thereto, and a frame holding the printed circuit board, wherein the liquid crystal panel is held by a rib portion of the frame with a gap therebetween. In addition, the gap is sealed with a flexible resin having an elastic modulus Ea of 150 kg / mm ≦ Ea ≦ 250 kg / mm.

According to the present invention, a gap is provided between the liquid crystal panel and the rib, and the gap is filled with an elastic flexible resin and sealed, so that the frame is formed. Body deformation and glass breakage are eliminated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Note that the same reference numerals are used for the same parts as those of the conventional one. FIG. 1 is a plan view showing a joined state of a liquid crystal panel and a frame made of synthetic resin in the liquid crystal display device of the present invention, and FIG. 2 is a partially enlarged view of FIG. In FIG. 1, 1 is a liquid crystal panel, 2 is a frame, 3a, 3b, 3c, 3d are ribs of the frame, 4a, 4b, 4c, 4d, 4e, 4f are driving ICs of the liquid crystal panel 1, 5a and 5b are printed circuit boards, 6
a, 6b, 6c, 6d, 6e, 6f are TCP, 7a, 7
b, 7c and 7d are flexible resins. In the present embodiment, the elastic resin has an elastic modulus Ea of 150 kg / m.
Silicon resin with m ≦ Ea ≦ 250 kg / mm is used.

As shown in the enlarged view of FIG. 2, the gist of the present embodiment is a corner of the liquid crystal panel 1 and ribs 3a, 3b, 3c, 3c.
A gap G is provided between the gaps 3d, the flexible resin 7b is filled and sealed so as to cover the gap G, and the liquid crystal panel 1 is fixed to the frame body 2. Flexible resin 7a, 7 capable of applying thermal shock and mechanical shock applied to the display device
Since it can be absorbed by b, 7c and 7d, deformation of the frame 2 and breakage of the glass of the liquid crystal panel 1 can be prevented. FIG. 2 shows the liquid crystal panel 1 with the flexible resin removed from the corner surface side of the liquid crystal panel 1 for easy understanding, and the actual sealing completed state is shown in FIG. Flexible resin 7 so as to cover gap G from the corner surface of 1
a, 7b, 7c, 7d are attached and sealed.

As described above, according to the present embodiment, a gap is provided between a liquid crystal panel and a frame in a liquid crystal display device, and the gap is filled with a flexible resin and sealed. By doing so, the flexible resin acts as a cushioning material and absorbs thermal shock and mechanical shock applied to the liquid crystal display device, thereby preventing deformation of the frame and breakage of the glass of the liquid crystal panel. In addition, it has been confirmed that the display characteristics and the reliability of the liquid crystal display device can be satisfactorily operated without any change even with such a configuration.

[0011]

As described above, according to the present invention, a gap is provided between the liquid crystal panel and the frame in the liquid crystal display device, and the gap has an elastic modulus Ea of 150 kg / mm ≦ Ea ≦ 250 kg / mm
The flexible resin acts as a cushioning material and absorbs thermal shocks and mechanical shocks applied to the liquid crystal display device. Deformation and breakage of the glass of the liquid crystal panel can be prevented, and an advantageous effect that reliability is improved as compared with the conventional liquid crystal display device can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a joined state of a liquid crystal panel and a frame made of synthetic resin in a liquid crystal display device of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a plan view showing a bonding state of a liquid crystal panel and a frame made of synthetic resin in a conventional liquid crystal display device.

FIG. 4 is a partially enlarged view of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal panel, 2 ... Frame-shaped body, 3a, 3b, 3c,
3d: rib portion, 4a, 4b, 4c, 4d, 4e, 4f
... ICs for driving liquid crystal panels, 5a, 5b ... printed circuit boards, 6a, 6b, 6c, 6d, 6e, 6f ... TCP,
7a, 7b, 7c, 7d: flexible resin; G: void.

Claims (1)

[Claims] A liquid crystal panel having a liquid crystal layer held between a pair of electrode substrates; a liquid crystal panel driving IC electrically connected to the liquid crystal panel; and a liquid crystal panel driving IC.
A liquid crystal display device comprising a printed circuit board having a control circuit for a liquid crystal panel connected to the liquid crystal panel, and a frame holding the printed circuit board, wherein the liquid crystal panel is separated from a rib of the frame by a gap. The liquid crystal display device, wherein the liquid crystal display device is held and sealed with a flexible resin having an elastic modulus Ea of 150 kg / mm ≦ Ea ≦ 250 kg / mm.