JP2519442Y2 - Liquid crystal display antistatic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] (Industrial field of application) The present invention is intended to prevent liquid crystal displays incorporated in communication devices such as telephones and fax machines from being damaged by static electricity generated by the human body. The present invention relates to an antistatic device for a liquid crystal display.

(Prior Art) In general, a liquid crystal display incorporated in a communication device such as a telephone or a fax machine has a number of the liquid crystal display panel through a transparent window made of a plastic material provided in the main body of the communication device such as a telephone or a fax machine. And characters are displayed. During the winter or dry season, if static electricity generated by the human body falls from the fingertips, etc., through the gap between the fitting parts of the transparent window and into the metal frame (metal frame) that houses the liquid crystal display panel, the liquid crystal circuits such as ICs may be damaged. Display function may be impaired.

In view of this, a conventional static electricity prevention device for a liquid crystal display of this type has a third structure for preventing a liquid crystal display incorporated in a communication device such as a telephone or a fax machine from being damaged by static electricity generated by a human body. It is configured as shown in the figure.

In FIG. 3, for example, a flat board 2 is horizontally provided on a case body 1 of a communication device such as a telephone or a fax machine, and a pair of brackets 3 is provided at an end 2a of the board 2. It is attached at an angle. Further, a printed circuit board 4 is installed on each bracket 3, and a metal frame 5 forming a window hole 5a is provided on the bracket 3 so as to be easily viewed. A well-known liquid crystal display board 6 is incorporated.

The liquid crystal display plate 6 in the metal frame 5 is a liquid crystal display 7
Is composed. Further, a transparent insulating cover 8 is attached to the upper surface of the metal frame 5. A decorative cover 9 is provided on the transparent insulating cover 8 so as to cover the liquid crystal display 7. The decorative cover 9 on which the liquid crystal display plate 6 is located is provided with a peep window 10, and the peek window 10 forms an opaque edging portion 10b on the outer peripheral edge of the transparent plate 10a, whereby the insulation The outer shape of the cover 8 is surrounded.

In the antistatic device for a liquid crystal display described above, in winter or dry season, static electricity generated from a human body falls on the metal frame 5 accommodating the liquid crystal display plate 6 from a fingertip or the like through a gap between fitting portions of the viewing window 10. As a result, the liquid crystal circuit such as the IC may be damaged and the display function may be impaired. In order to prevent this, a transparent insulating cover 8 is provided on the upper surface of the metal frame 5.
The insulating cover 8 blocks the static electricity generated from the human body during the winter or dry season.

From the viewpoint of transparency, molding processability, heat resistance, etc., for example, a transparent sheet of polycarbonate is widely used as the insulating cover 8, and is actually vacuum-molded in a bowl shape to be used as a product.

(Problems to be solved by the invention) The insulating cover 8 used in the above-mentioned static electricity prevention device of the liquid crystal display has a transparent polycarbonate sheet formed into a bowl-shaped vacuum from the viewpoint of transparency, molding processability, heat resistance and the like. A molded product is used. However, this insulating cover 8 is sufficiently annealed (annealing action) before forming.
Otherwise, the heating effect during vacuum forming may cause bubbles, or the forming condition range for vacuum forming may be narrow, resulting in distortion of the knitted part, corrugations, wrinkles, protrusions, etc. There are problems such as impairing the display function as a display board and distorted displayed characters and numbers.

The present invention has been made in view of the above-mentioned circumstances, and provides an antistatic device for a liquid crystal display, which has an insulating property of static electricity and is improved in display function and quality as a display plate. The purpose is to

[Constitution of device]

(Means for Solving the Problem and Its Action) In order to achieve the above object, the present invention mounts a metal frame having a window hole at a predetermined position of a printed circuit board, and incorporates a liquid crystal display inside the metal frame. In the antistatic device for a liquid crystal display in which the surface of the liquid crystal display is covered with a transparent insulating cover, the insulating cover has an opening, and a frame-shaped insulating frame that covers the metal frame from the outside, It is composed of a transparent insulating sheet attached to the inner surface of the insulating frame so as to close the opening, and effectively exhibits a display function as a display plate. At the same time, the characters and numbers are clearly displayed to improve the display function and quality as a display plate having an insulating property of static electricity.

(Embodiment) Hereinafter, one embodiment of the present invention will be described.

The present invention will be described by giving the same reference numerals to the same components as those of the above-described specific example.

In FIGS. 1 and 2, reference numeral 1 denotes a case body of a communication device such as a telephone or a fax machine, and a flat substrate 2 is horizontally provided on the case body 1. A pair of brackets 3 are obliquely attached to the end portion 2a on the substrate 2. Also, each of these brackets 3
A printed circuit board 4 is installed on the above, and a window hole 5a is further provided on the printed circuit board 4.
The metal frame 5 on which is formed is inclined so that it is easy to see. A well-known liquid crystal display plate 6 is incorporated in the metal frame 5. The liquid crystal display plate 6 in the metal frame 5 constitutes a liquid crystal display 7. Further, a relatively thin transparent rectangular insulating sheet 11 is attached to the upper surface of the metal frame 5, and an adhesive or a double-sided adhesive tape 11 is provided on the outer peripheral portion of the transparent insulating sheet 11.
a is applied. Further, a rectangular frame-shaped insulating frame 12 is attached on the insulating sheet 11 so as to cover the metal frame 5 from the outside, and the insulating frame 12 and the insulating sheet 11 are substantially formed. It is configured in one. Furthermore, on the upper side of this insulating frame 12,
A makeup cover 9 is provided so as to cover the liquid crystal display 7, and the makeup cover 9 on which the liquid crystal display plate 6 is located
Is provided with a peep window 10, and the peep window 10 has an opaque edging portion 10b formed on the outer periphery of a transparent plate 10a so as to surround the outer shape of the insulating sheet 11.

Therefore, even if the static electricity generated from the human body tries to fall from the fingertip or the like to the metal frame 5 accommodating the liquid crystal display panel 6 through the gap between the fitting portions of the observation window 10 in the winter or dry season, Since the transparent insulating sheet 11 stuck on the upper surface and the insulating frame 12 are insulated from each other, it is possible to prevent the static electricity generated from the human body from falling during the winter or the dry season.

[Effect of device]

As described above, according to the present invention, since the insulating cover is composed of the two members of the insulating frame and the insulating sheet, it is possible to prevent the insulating sheet from being distorted, corrugated, wrinkled, protruding, and air bubbles generated during vacuum forming. Therefore, not only the display function as a display board can be effectively exhibited, but also characters and numbers can be clearly displayed, and the display function and the quality as a display board having an electrostatic insulating property can be improved. Has excellent effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an antistatic device for a liquid crystal display incorporated in a communication device such as a telephone or a fax machine, FIG. 2 is an exploded perspective view of the same as above, and FIG. 3 is a conventional liquid crystal display. It is an exploded perspective view showing the important section of the antistatic device of a container. DESCRIPTION OF SYMBOLS 1 ... Case main body, 2 ... Board, 4 ... Printed circuit board, 5 ... Metal frame, 6 ... Liquid crystal display board, 7 ... Liquid crystal display, 9 ... Decorative cover, 10 ... Viewing window, 11 ... Insulating sheet, 12 ... Insulating frame .

Claims (1)

(57) [Scope of utility model registration request] 1. A liquid crystal display in which a metal frame having a window hole is attached to a predetermined position of a printed circuit board, a liquid crystal display is incorporated inside the metal frame, and the surface of the liquid crystal display is covered with a transparent insulating cover. In the antistatic device, the insulating cover has an opening, and a frame-shaped insulating frame that covers the metal frame from the outside, and an insulating frame is attached to the inner surface of the insulating frame so as to close the opening. An antistatic device for a liquid crystal display, comprising: a transparent insulating sheet provided.