JP2002189210A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a liquid crystal display panel between an exterior frame and a shielding plate without use of a resin. SOLUTION: The liquid crystal display device comprises a liquid crystal display panel 1 mounted between the exterior frame 10A with an opening part formed corresponding to an effective pixel region of the liquid crystal display panel and the shielding plate 20A. The shielding plate 20A is provided with panel presser bar springs 22. The exterior frame 10A is provided with spring hooking parts 14 to hook the panel presser bar springs 22. The liquid crystal display panel 1 is loaded between the exterior frame 10A and the shielding plate 20A and fixed between the exterior frame 10A and the shielding plate 20A by hooking the panel presser bar springs 22 on the spring hooking parts 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for fixing a liquid crystal display panel to an outer frame without using an ultraviolet curable resin or a room temperature curable silicone resin.

[0002]

2. Description of the Related Art In a manufacturing process of a liquid crystal display device, a liquid crystal display panel comprising a pair of substrates facing each other and a liquid crystal layer sandwiched between the substrates is formed by opening an opening corresponding to an effective pixel region of the liquid crystal display panel. A mounting step of fixing between an outer frame having a window) and functioning as an emission parting plate and an entrance parting plate having an opening (incident window) corresponding to an effective pixel area of the liquid crystal display panel is performed. Here, the emission parting plate and the incident parting plate are provided at the time of mounting the liquid crystal display panel in order to prevent light from entering from the periphery of the liquid crystal display panel and light leakage from the periphery of the liquid crystal display panel. is there.

FIG. 6 is a plan view of an outer frame 10 used in a conventional mounting process. An emission window 12 is formed in a bottom portion 11 of the outer frame 10, and a side wall portion 13 covers a side surface of the liquid crystal display panel. It is formed at the covering height. On the other hand, FIG. 7 is a plan view of the entrance parting plate 20, which is made of a spring material having an entrance window 21.

[0004] As a specific mounting process of the liquid crystal display panel, for example, as shown in FIGS. 8 and 9, the liquid crystal display panel 1 and the outer frame are formed by ultraviolet curing resin 2 at four places on the side surface of the liquid crystal display panel 1. The liquid crystal display panel 1 is fixed in the outer frame 10 by filling the gap between the liquid crystal display panel 1 and the outer frame 10 with a room-temperature-curable silicone resin 3 as an elastic resin for molding. Then, the incident parting plate 20 is fitted into the outer frame 10 from above. After the liquid crystal display panel 1 is mounted between the outer frame 10 and the entrance parting plate 20, an electrical check is performed.

[0005]

However, in the mounting process of the conventional liquid crystal display panel 1, in order to fix the liquid crystal display panel 1 to the outer frame 10, the ultraviolet curing resin 2 and the room temperature curing silicone resin 3 are used. Therefore, it takes a long time to cure these resins, and the productivity is reduced.

Further, the surface of the equipment and the liquid crystal display panel 1 is contaminated by stringing or the like after the application of the silicone resin 3 used as the elastic resin for the mold, which adversely affects the display quality of the liquid crystal display panel 1 and the maintenance of the equipment. You.

Further, in an LCD projector or the like, as a mounting structure of a liquid crystal display panel, an entrance side dustproof glass 4 or an exit side dustproof glass 5 having a thickness of about 1 mm is attached to both sides of the liquid crystal display panel 1 as shown in FIG. The mainstream is a dust-proof glass structure in which an entrance parting plate 20 and an exit parting plate 15 are provided on the entrance-side dust-proof glass 4 and the exit-side dust-proof glass 5, respectively. A liquid (base agent and curing agent) type silicone gel adhesive 6 is used. However, when the silicone gel adhesive 6 comes into contact with the ultraviolet curable resin 2 or the room temperature curable silicone resin 3 used for fixing the liquid crystal display panel 1 to the outer frame 10, the silicone gel adhesive 6 also inhibits curing, and the silicone gel adhesive 6 The portion where the adhesive 6 comes into contact becomes uncured, and the liquid crystal display panel 1 and the entrance-side dustproof glass 4 or the exit-side dustproof glass 5 are separated from each other.

Further, in the conventional mounting structure in which the liquid crystal display panel 1 is fixed to the outer frame 10 with resin, when a defect is found in the liquid crystal display panel 1 by inspection after mounting, not only the liquid crystal display panel 1 but also The outer frame 10 must be discarded together with the liquid crystal display panel 1, and the outer frame is wasted.

The present invention has been made to solve the above-mentioned problems associated with the mounting process of the liquid crystal display panel, and to make it possible to fix the liquid crystal display panel between the outer frame and the parting plate without using a resin. Aim.

[0010]

The inventor of the present invention provided a spring material on an entrance parting plate, pressed the liquid crystal display panel with the entrance parting plate, and fixed the outer panel to an ultraviolet curable resin or a room temperature curable resin. It has been found that a silicone resin is not required, and that the curing inhibition factor of the silicone gel adhesive used in the dustproof structure is eliminated.

That is, the present invention relates to a liquid crystal display device in which a liquid crystal display panel is mounted between an outer frame having an opening corresponding to an effective pixel area of the liquid crystal display panel and a parting plate. And the parting plate has a panel holding spring,
The outer frame has a spring engaging portion that engages with the panel pressing spring,
Provided is a liquid crystal display device in which a liquid crystal display panel is mounted between an outer frame and a parting plate, and the liquid crystal display panel is fixed between the outer frame and the parting plate by engagement of a panel holding spring and a spring engagement portion. I do.

Further, the present invention relates to a method of manufacturing a liquid crystal display device in which a liquid crystal display panel is mounted between an outer frame having an opening corresponding to an effective pixel area of the liquid crystal display panel and a parting plate. There is a parting plate having a panel holding spring, an outer frame having a spring engaging part to be engaged with the panel holding spring, placing the liquid crystal display panel on the outer frame, covering the parting plate thereon, and holding the panel holding member. A method for manufacturing a liquid crystal display device, wherein a liquid crystal display panel is fixed between an outer frame and a parting plate by engaging a spring and a spring engagement portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described with reference to the drawings. In each of the drawings, the same reference numerals represent the same or equivalent components.

In the present invention, when the liquid crystal display panel is fixed between the outer frame and the entrance parting plate, as shown in FIG. 3, an outer frame 10A is provided with an opening (corresponding to an effective pixel area of the liquid crystal display panel). An entrance window 2 is used as shown in FIG. 4, comprising a bottom portion 11 on which an exit window 12 is formed and a side wall portion 13 covering a side surface of the liquid crystal display panel 1.
0A is the same as the conventional method in that a spring material having an opening (incident window) 21 corresponding to the effective pixel area of the liquid crystal display panel 1 is used, but is provided at four positions on the peripheral edge of the incident parting plate 20A. Is formed with a leaf spring-shaped panel holding spring 22 made of a SUS material or the like. In addition, a spring engaging portion 14 that engages with the panel pressing spring 22 is formed on the outer surface of the side wall portion 13 of the outer frame 10A. The main body of the incident parting plate 20A is formed of a SUS spring material or the like, and the outer frame 10A is formed of a plastic molded product. FIG. 5 is an enlarged side view of the panel pressing spring 22, in which a broken line indicates the shape of the panel pressing spring 22 when engaged with the panel engaging portion 14 (FIG. 3).

When the liquid crystal display panel 1 is mounted, as shown in FIGS. 1 and 2, the liquid crystal display panel 1 is placed at a predetermined position on the bottom 11 of the outer frame 10A so as to be dropped, and the light enters from above. The parting plate 20A is put on the parting plate 20A.
A panel holding spring 22 is connected to spring engaging portion 14 of outer frame 10.
And hook it up. As a result, the liquid crystal display panel 1 is pressed by the entrance parting plate 20A toward the emission window 12 of the outer frame 10A, and the outer frame 10A and the entrance parting plate 20A are pressed.
A is fixed between A. According to this method, the outer frame 10A
In fixing the liquid crystal display panel 1 to the liquid crystal panel, a resin such as an ultraviolet-curable resin or a room-temperature-curable silicone resin, which has been conventionally used when mounting the liquid crystal display panel, is not used. Contamination of the liquid crystal display panel and peripheral equipment, curing inhibition of the silicone gel adhesive used in the dust-proof glass structure were eliminated, and defects were found in the liquid crystal display panel during inspection after fixing the liquid crystal display panel to the outer frame. In this case, the outer frame is not wasted.

In the present invention, as shown in FIG. 1, a convex surface 23 is provided on the surface of the entrance parting plate 20A facing the liquid crystal display panel 1, and the panel holding spring 22 and the spring engaging portion 14 engage this convex surface. It is preferable that the liquid crystal display panel 1 is pressed down at 23 to prevent the pressing force from being locally concentrated on the liquid crystal display panel 1.

Although the present invention has been described with reference to the drawings, the present invention can take various other forms. For example, even when a dustproof glass structure as shown in FIG. 10 is formed, a panel holding spring is provided on the parting plate,
The liquid crystal display panel 1 may be fixed by pressing the liquid crystal display panel 1 to the outer frame with a parting plate via the dustproof glass.

Also, the mode in which the liquid crystal display panel 1 is fixed to the outer frame 10A having the exit window by the incident parting plate 20A has been described. The present invention can be applied to the case of fixing.

[0019]

According to the present invention, it is possible to fix a liquid crystal display panel between an outer frame and a parting plate without using a resin. Therefore, when fixing the liquid crystal display panel to the outer frame, it is not necessary to secure the curing time of the resin, the productivity can be improved, and the liquid crystal display panel and the like can be prevented from being contaminated by stringing of the resin. . In addition, the curing inhibition factor of the silicone gel adhesive used in the dustproof structure is eliminated. Furthermore, if a defect is found in the LCD panel during inspection after fixing the LCD panel to the outer frame, the LCD panel alone can be discarded, and the previously discarded outer frame can be reused. Can be planned.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of the present invention when an outer frame and an entrance parting plate are engaged with each other.

FIG. 2 is a plan view after mounting a liquid crystal display panel in the present invention.

FIG. 3 is a plan view of an outer frame used in the present invention.

FIG. 4 is a plan view of an entrance parting plate used in the present invention.

FIG. 5 is an enlarged side view of a panel holding spring.

FIG. 6 is a plan view of a conventional outer frame.

FIG. 7 is a plan view of a conventional entrance parting plate.

FIG. 8 is an explanatory sectional view of a mounting process of a liquid crystal display panel according to a conventional method.

FIG. 9 is a plan view after mounting the liquid crystal display panel.

FIG. 10 is a sectional view of a dust-proof glass structure of a conventional liquid crystal display panel.

[Explanation of symbols]

1: Liquid crystal display panel, 2: UV curable resin, 3:
Room temperature curing type silicone resin, 4 ... Dustproof glass on the entrance side,
5: emission side dustproof glass, 6: silicone gel adhesive, 10A: outer frame, 11: bottom, 12: emission window,
13 ... side wall part, 14 ... spring engagement part, 20A ... incident parting plate, 21 ... incident window, 22 ... panel holding spring,
23 ... convex

Claims (4)

[Claims] 1. A liquid crystal display device wherein a liquid crystal display panel is mounted between an outer frame in which an opening corresponding to an effective pixel area of the liquid crystal display panel is formed and a parting plate. Has a panel pressing spring, the outer frame has a spring engaging portion that engages with the panel pressing spring, the liquid crystal display panel is placed between the outer frame and the parting plate, and the panel pressing spring and the spring engaging portion A liquid crystal display device in which a liquid crystal display panel is fixed between an outer frame and a parting plate by hooking. 2. The liquid crystal display according to claim 1, wherein a convex surface is provided on a surface of the parting plate facing the liquid crystal display panel, and the liquid crystal display panel is surface-pressed with the convex surface by the engagement of the panel pressing spring and the spring engagement portion. apparatus. 3. A method of manufacturing a liquid crystal display device, comprising mounting a liquid crystal display panel between an outer frame having an opening corresponding to an effective pixel area of the liquid crystal display panel and a parting plate. The plate has a panel holding spring, and the outer frame has a spring engaging portion that engages with the panel holding spring. The liquid crystal display panel is placed on the outer frame, and a parting plate is put thereon, and the panel holding spring is engaged with the spring. A method for manufacturing a liquid crystal display device, wherein a liquid crystal display panel is fixed between an outer frame and a parting plate by engaging portions. 4. The liquid crystal display panel according to claim 3, wherein a parting plate having a convex surface on a surface facing the liquid crystal display panel is used, and the liquid crystal display panel is surface-pressed on the convex surface by engagement of a panel holding spring and a spring engagement portion. A method for manufacturing a liquid crystal display device.