JPH09171359A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for unnecessarily increasing the relative height of the screen of an LCD and a filter and narrowing the effective area of a printed circuit board by providing a liquid crystal display device with a skirt film of a separate body hanging down from the inner periphery of a switch case. SOLUTION: The skirt film 16 is formed as a film body molded into an annular body and is firmed in an L shape in cross section hangingly provided with a shielding film 17 from the front edge of a flange film 18 mounted and fixed to the switch case 2. This flange film 18 is inserted and mounted between the edge of the filter 4 of the switch case 2 and the printed circuit board 7. The shielding film 17 has a shape to hang down along the inner side of the picture frame shape of the shielding film so as to frame and enclose the film. When the switch case 2 is combined by placing and setting the case to a liquid crystal section 1, the inlet of a spacing 10 existing between the housing 8 of the liquid crystal section 1 and the printed circuit board 7 of the switch case 2 in this combined state is closed by the shielding film 17. As a result, the visual recognition quality of the liquid crystal display is improved.

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 which is installed in the center of an instrument panel of an automobile and displays necessary information such as a map on a liquid crystal display.

[0002]

2. Description of the Related Art As a liquid crystal display device installed on an instrument panel of an automobile, there is a known example shown in Japanese Patent Publication No. 5-4541 (see FIG. 2), and an LCD 3 (liquid crystal display) is housed in a housing 8. Liquid crystal part 1,
It is composed of a combination of frame-shaped switch cases 2 having the switch device for the LCD 3 and mounted on the periphery of the liquid crystal part 1. By operating the switch devices, display objects such as maps appearing on the LCD 3 can be displayed on the switch case 2. It has a basic structure through which the filter 4 is visible.

That is, the switch case 2 is a touch switch composed of a light emitting element 5 and a light receiving element 6 provided inside an edge portion 9 of a ring shape such as a square (or a switch knob protruding outside the edge portion). Mechanical switch consisting of),
The printed circuit board 7 for detecting the switch operation of the touch switch is attached to the lower side of the edge portion 9, and a slight gap 10 is provided between the printed circuit board 7 of the switch case 2 and the housing 8. The electronic components and the wirings are housed in the gap 10.

However, the portion of the gap 10 is the LCD 3
If the line of sight of a person who visually recognizes is easily entered and the electronic components / wiring and the internal structure existing there are seen, it hinders the visibility for confirming the display surface of the LCD 3 and the liquid crystal display article. As it lacks in appearance quality,
A shield plate 11 which is vertically provided at the entrance of the gap 10 and a blind plate 13 which is a separate annular body having a T-shaped cross-section and in which a mounting flange 12 is provided on the back surface of the shield plate 11 are prepared. 12 is placed on the switch case 2 so as to overlap the printed circuit board 7, and the entrance of the harmful gap 10 is blocked.

[0005]

In the above conventional liquid crystal display device, the entrance of the harmful gap 10 is shielded by the presence of the blindfold plate 13 to improve the visual quality and the appearance quality, but the blindfold plate 13 is mass-produced. Since it is molded by resin, it has no choice but to have a correspondingly thick shape, and the flange portion 12 of the thick plate body is superposed and set on the printed circuit board 7.
In order to ensure the required height of 0, the height H between the LCD 3 and the filter 4 is consequently amplified by the thickness of the flange portion 12.

Therefore, the LCD 3 and the designated point P at the coordinates designated on the filter 4 by operating the touch switch.
“Displacement” of the coordinate point due to the visual angle with the display point P ′ that appears (if the visual angle for visually recognizing the LCD 3 is inclined, H
Point P through the distance of the display point P'of the LCD 3
(The coordinate point of is shifted) causes deterioration of the visual quality, and the presence of the hanging plate 11 of the blindfold plate 13 reduces the effective area of the printed circuit board 7. There are the above problems. The present invention provides a liquid crystal display device that solves the above-mentioned drawbacks of the prior art.

[0007]

A liquid crystal display device according to the present invention which solves the above technical problems has a frame-shaped switch case having a liquid crystal display switch device at the periphery of a liquid crystal part whose main part is a liquid crystal display. In the liquid crystal display device in which the switch case and the liquid crystal unit are mounted together in the switch case, a separate skirt film attached to the switch case and hanging from the inner periphery of the switch case is provided. The structure is such that the entrance of the gap existing in the above is shielded by the skirt film. The skirt film is preferably matte black that suppresses the reflection of the liquid crystal display.

[0008]

In the liquid crystal display device of the present invention having the above-mentioned structure, when the switch case having the skirt film mounted thereon is placed on the liquid crystal part and combined, the switch case and the liquid crystal part are provided with a switch case at the entrance thereof. Since the skirt film hangs down and shields, it is possible to prevent the "ragged state" in the gap from entering the visual field of the screen viewer. Since the skirt film is a film body, the skirt film body does not unnecessarily increase the relative height between the screen of the LCD and the filter or reduce the effective area of the printed circuit board. It is possible to secure high visibility and flexibility in the design of printed circuit boards.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention described above is carried out as in the following embodiments.

[0010]

Example: Installed on an automobile instrument panel,
A liquid crystal display device according to an embodiment of the present invention for providing a driver or the like with necessary information such as a map will be described in detail with reference to FIG. That is, "the liquid crystal unit 1 in which the LCD 3 is housed in the housing 8 and the LCD 3 is exposed from the window of the housing 8" and "the light emitting element 5 and the light receiving element 6 which are disposed inside the edge portion 9 to face each other
And a frame-shaped switch case 2 "having a switch device provided with a printed circuit board 7 for detecting a switch operation of the touch switch. The printed circuit board 7 is attached below the edge portion 9. The switch case 2 is mounted on the peripheral portion of the liquid crystal part 1 and assembled, and the LCD is activated by the operation of the touch switch.
A liquid crystal display device in which necessary information such as a map is displayed on the display screen 3 and a filter 4 provided on the switch case 2 is made visible so that the liquid crystal display object can be visually recognized.
The skirt film 16, which will be described in detail below, is attached to this.

That is, the skirt film 16 (see FIG. 1B) is formed into a ring-shaped film body, and the shielding film 17 is hung from the front edge of the flange film 18 attached and fixed to the switch case 2. The L-shaped cross section is provided, and the flange film 18 is mounted by being sandwiched between the edge of the filter 4 of the switch case 2 and the printed circuit board 7, and the shielding film 17 surrounds the frame along the inside of the frame shape. When the switch case 2 is mounted and set on the liquid crystal part 1 and is combined, the gap 10 existing between the housing 8 of the liquid crystal part 1 and the printed circuit board 7 of the switch case 2 is formed in the combined state. The entrance is blocked by the shielding film 17. Reference numeral 15 in the drawing is a cover case for enclosing and protecting the switch case 2, and 19 is a corner cover for protecting the edge portion 9.

The skirt film 16 of this embodiment
Is a polyester-based resin film punched into a predetermined shape, and then formed into the above-mentioned shape by any means such as hot pressing, and the whole is formed with a matte black one, or the above-mentioned coating after molding. Therefore, the surface exposed to the center side of the switch case 2 has a matte black color at least in the above-described shielded posture.

In the liquid crystal display device of the embodiment shown in FIG. 1, the skirt film 16 mounted on the switch case 2 has a gap 1
Since the 0 entrance is blocked, the electronic components existing in the gap 10
Since the "wobbled" object such as wiring does not enter the visual field of the visual object for visually recognizing the LCD 3, the visual recognition of the screen is further facilitated, the visual quality is improved, and the external appearance quality as the liquid crystal display object is improved. The skirt film 16 has a film structure as a whole, and the skirt film 1
Since the dimensional loss due to the presence of 6 is small, the relative height between the screen of the LCD 3 and the filter 4 is unnecessarily increased and there is no fear of degrading the screen due to the coordinate point deviation, and the printed circuit board 7 Since the effective area is not narrowed, the degree of freedom in designing the printed circuit board 7 can be secured.

The liquid crystal display device of the present invention is not limited to the above embodiment, and the skirt film 16 may have a divided shape, or a mechanical switch may be used instead of the touch switch.

[0015]

As described above, in the liquid crystal display device of the present invention, the frame-shaped switch case is mounted on the liquid crystal part having the liquid crystal display, and the switch case and the peripheral part of the liquid crystal part are combined. It effectively shields the gap existing between and, improves the visual quality and appearance quality of the liquid crystal display, and has practical effects that can be achieved by ensuring the design flexibility of the printed circuit board of the switch case. .

[Brief description of the drawings]

FIG. 1 shows a liquid crystal display device of an embodiment of the present invention, (A)
Is a central longitudinal sectional view thereof, and (B) is an overall perspective view of the skirt film.

2A and 2B show a conventional liquid crystal display device, in which FIG. 2A is a central longitudinal sectional view thereof, and FIG. 2B is a plan view thereof.

[Explanation of symbols]

 1 Liquid Crystal Part 2 Switch Case 3 LCD (Liquid Crystal Display) 4 Filter 5 Light Emitting Element 6 Light Sensing Element 7 Printed Circuit Board 8 Housing 9 Edge 10 Gap 13 Blind Plate 15 Cover Case 16 Skirt Film 17 Shielding Film 18 Flange Film

Claims (3)

[Claims] 1. A liquid crystal display device in which a frame-shaped switch case having a switch device for the liquid crystal display is mounted and assembled on the periphery of a liquid crystal part having a liquid crystal display as a main part. A structure is provided in which a separate skirt film that hangs down from the inner periphery of the switch case is provided, and in the combined state, the entrance of the gap existing between the facing of the switch case and the liquid crystal part is shielded by the skirt film. Liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein the skirt film has a matt black surface at least exposed on the center side of the switch case. 3. The liquid crystal display device according to claim 1, wherein the switch device of the switch case is a touch switch.