JP2001022291A - Planar display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the position of a display panel picture from varying for every product resulting from a clearance formed for absorbing part tolerance and assembling error and to prevent the position of a display panel picture from deviating de to vibration or impact. SOLUTION: This planar display device is constituted in such a manner that a liquid crystal panel 2 and a back light mechanism which consists of a lamp 5 and a light guide body 3 and is disposed in order to apply the light from the back face of the liquid crystal panel 2 are held in a metallic frame 1 which constitutes a body of equipment by means of a plastic frame 7. Therein, the liquid crystal panel 2 is elastically held by a protruding part 8 which is integrally formed in a plastic frame 7, thereby prevents the variation of the picture position for every product due to the clearance formed between the liquid crystal panel 2 and the plastic frame 7, and the deviation of the picture position due to vibration or impact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display, and more particularly to a structure for preventing a liquid crystal panel from being displaced due to a tolerance.

[0002]

2. Description of the Related Art In recent years, electronic devices such as portable personal computers equipped with a liquid crystal display device are increasing. Due to their characteristics, these devices are required to have high physical strength in addition to miniaturization and weight reduction.

The same applies to the required performance of the liquid crystal display devices used in these devices. Improvements in drive circuits, mounting techniques, devices, mechanical structures, and the like are being continued.

[0004] With the advance of the above technology, a liquid crystal display device having a narrow edge portion (narrow frame portion) has been put into practical use, and the distance between the outer edge of the device and the edge of the display screen is about several mm. It has even appeared.

On the other hand, attempts to reduce the thickness of a liquid crystal display device have been actively made, and a structure having a total thickness of 5 mm or less is becoming uncommon.

FIG. 4 is a partial cross-sectional view of a conventional liquid crystal display device, particularly illustrating a thinned configuration.

As shown in the figure, the liquid crystal display device
The structure is such that a liquid crystal panel 2 is held in a metal frame 1.

When the liquid crystal panel 2 is of a transmissive type, a backlight from the back is generally required. For this reason, a thin light guide 3 is provided on the back of the liquid crystal panel 2 which is opposite to the observation surface. It is arranged so as to be in close contact with the liquid crystal panel 2.

The light guide 3 has a lamp 5 for introducing light from a surface perpendicular to the light emission surface, that is, an end surface.
Are combined. That is, the light from the lamp 5 is applied to the liquid crystal panel 2 from the back surface through the light guide 3. As a result, the image displayed on the liquid crystal panel 2 can be observed from the observation surface of the liquid crystal panel 2.

[0010] The backlight lamp 5 is held by a lamp holder 6.

A plastic frame 7 is interposed between the metal frame 1 constituting the outer casing of the liquid crystal display device, the liquid crystal panel 2 and the lamp holder 6. The liquid crystal panel 2 and the lamp holder 6 are fixed in the metal frame 1 by the action of the plastic frame 7.

At the present time, the demand for a thinner liquid crystal display device is severe, and the thinning of the liquid crystal display device has been pursued almost to the limit both in terms of strength and manufacturing technology, and the configuration shown in FIG. However, it is the basis for thinning.

[0013]

As described above, the conventional liquid crystal display device includes the metal frame 1 and the liquid crystal panel 2.
The plastic frame 7 is interposed between the components, but in order to prevent a hit due to a tolerance of a used part or an assembling error occurring during assembly,
It is necessary to secure a clearance in consideration of the tolerance in advance. In other words, a gap exists between the liquid crystal panel 2 and the plastic frame 7 in the horizontal direction in the drawing as indicated by arrows A and B in design, and the position of the liquid crystal panel 2 in the metal frame 1 is changed. Cannot be accurately positioned, and the screen position of the liquid crystal panel 2 varies not only for each product, but also the screen position of the liquid crystal panel 2 changes from the initial state due to vibration and shock.
There is a problem that they are shifted in the directions of arrows A and B.

The present invention solves the above-mentioned problems of the prior art, prevents a variation in liquid crystal panel screen position, and prevents a liquid crystal panel screen position from being shifted due to vibration or shock. The purpose is to provide.

[0015]

In order to achieve the above object, the present invention comprises a display panel as a display, and frame means for holding the display panel, wherein the frame means comprises a display panel. Is pressed and supported in a direction facing each other from both ends thereof, and the display panel is flexibly supported along the pressing direction between the frame means and the end face of the display panel pressed and supported by the frame means. The present invention provides a flat panel display characterized by interposing elastic support means.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a case where a flat display device is a liquid crystal display device as an example. FIG. 1 is a partial cross-sectional view of a liquid crystal display device according to a liquid crystal display device according to an embodiment of the present invention, and particularly illustrates a thin configuration. As shown in the figure, the liquid crystal display device has a structure in which a liquid crystal panel 2 is built in a metal frame 1.

A light guide 3 is disposed on the rear surface of the liquid crystal panel 2 opposite to the observation surface so as to be in close contact with the liquid crystal panel 2. Then, the PWB 4 is arranged on the opposite side of the light guide 3 from the liquid crystal panel 2. The lamp 5 is combined with the light guide 3. The lamp 5 for the backlight is held by a lamp holder 6.

A plastic frame 7 is interposed between the metal frame 1 constituting the outer casing of the liquid crystal display device, the liquid crystal panel 2 and the lamp holder 6. The liquid crystal panel 2 and the lamp holder 6 are fixed in the metal frame 1 by the action of the plastic frame 7.

A protrusion (elastic support means) 8 as an elastic piece is formed at the end of the plastic frame 7 and is brought into contact with the liquid crystal panel 2. By the way,
The protruding portions 8 are formed on the surface of the plastic frame 7 facing the liquid crystal panel 2 at positions corresponding to both ends of the end surface of the liquid crystal panel 2 facing the plastic frame 7 so as to be flexible and movable. Stopper,
The liquid crystal panel 2 is elastically held in the metal frame 1 to restrict the movement of the liquid crystal panel 2.

FIG. 2 is a schematic plan view of the configuration of FIG.
In particular, it shows the structure of the projection 8. As shown in FIG. 2, the protrusions 8 are arranged at both ends (portions surrounded by dotted lines C and D) of the surface of the plastic frame 7 facing the liquid crystal panel 2 in a structure that provides flexibility. You.

FIG. 3 is an enlarged explanatory view of a portion (a) surrounded by a dotted line C and a portion (b) surrounded by a dotted line D in FIG. As is apparent from the figure, the protrusion 8 is a member formed integrally with the plastic frame 7 through a cutout space 9 formed in the plastic frame 7, and the end of the liquid crystal panel 2 is abutted with the abutting surface 10. Hold. On the other hand, between the other part of the plastic frame 7 and the liquid crystal panel 2, a clearance 11 in consideration of a tolerance is provided as in the conventional case.

With the above-described configuration, the projection 8 formed as a part of the plastic frame 7 has flexibility and elastic action toward the liquid crystal panel 2 by securing the cutout space 9 as a movement space. Power is given.

As a result, the movement of the liquid crystal panel 2 inside the metal frame 1 can be restricted by the elastic holding action of the projection 8.

In the structure shown in FIG. 1, a structure in which the protrusions 8 are formed so as to be opposed to the two ends of the liquid crystal panel 2 at both ends is illustrated. However, the present invention is not limited to this. Instead, the number may be more than that, and the same effect can be obtained. Further, by forming the projections 8 on the surface of the plastic frame 7 facing the liquid crystal panel 2 as a whole, the holding force is dispersed,
It is possible to hold the liquid crystal panel 2 in a well-balanced manner.

Further, in the above embodiment, the case where the projection 8 is formed integrally with the plastic frame 7 is exemplified, but it may be formed separately.

Further, in the above-described embodiment, the case where the projections 8 are formed on the plastic frame 7 side has been exemplified, but these may be integrated with the member on the liquid crystal panel 2 side or separately.
The same effect can be obtained even if they are arranged.

[0027]

As described above, according to the present invention, the movable projection having flexibility is arranged on the surface of the plastic frame 7 holding the liquid crystal panel 2 in the metal frame 1 toward the liquid crystal panel 2. As a result, the liquid crystal panel 2 is elastically held in the metal frame 1, and the problem that the screen position of the liquid crystal panel 2 differs for each product, and the problem that the screen position of the liquid crystal panel 2 shifts due to vibration or impact. There is an effect that can be eliminated.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the configuration of FIG.

FIG. 3 is a partially enlarged explanatory view of FIG. 2;

FIG. 4 is a partial sectional view of a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal frame 2 Liquid crystal panel 3 Light guide 4 PWB 5 Lamp 6 Lamp holder 7 Plastic frame 8 Projection part 9 Notch gap 10 Abutment surface 11 Clearance

Claims (3)

[Claims] 1. A display panel as a display, and frame means for holding the display panel, wherein the frame means presses and supports the display panel in a direction facing each other from both ends thereof. Flat display, characterized by interposing elastic support means for flexibly supporting the display panel along the pressing direction between the frame means and the end face of the display panel pressed and supported by the frame means. apparatus. 2. The flat display device according to claim 1, wherein said frame means is made of an elastic material, and said elastic support means is integrally formed with said frame means. 3. The flat display device according to claim 1, wherein said elastic support means is formed separately from said frame means.