JPH09258177A - Plane display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of parts and to improve the workability by providing a display device with a driving circuit board, a frame and a means for fixing a bezel. SOLUTION: A screw 101a is engaged with the hole part 65d of the bezel 61 via a lamp cover and frame through-hole 81a from the rear surface side of the liquid crystal display device 1. A screw 101b is engaged with the hole part 65b of the bezel 61 via an X-PCB through-hole 21b and a frame through- hole 81b from the rear surface side of the liquid crystal display device 1. A screw 101c is engaged with the hole part 65c of the bezel 61 via the lamp cover, an Y-PCB through-hole 31c and a frame through-hole 81c from the rear surface side of the liquid crystal display device 1. Further, a screw 101d is engaged with the hole part 65d of the bezel 61 via a an Y-PCB notch 21d, a Y-PCB through-hole 31d and a frame through-hole 81c from the rear surface side of the liquid crystal display device 1. As a result, a frame edge is formable narrow with respect to an effective display region 11a.

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 device represented by a liquid crystal display device, and more particularly to a fixing method thereof.

[0002]

2. Description of the Related Art In recent years, flat panel display devices represented by liquid crystal display devices have come to be used in various fields by taking advantage of their thinness and light weight as compared with conventional display devices such as CRTs. .

The structure of a conventional liquid crystal display device will be briefly described. The liquid crystal display device includes a liquid crystal panel in which a liquid crystal material is held between a pair of electrode substrates via an alignment film or the like. And a control signal such as a clock signal,
An X-side circuit board (hereinafter abbreviated as X-PCB) which generates image data or a driving voltage and is arranged on one side of the liquid crystal panel, and a Y-side circuit which is arranged on the other side of the liquid crystal panel. A substrate (hereinafter abbreviated as Y-PCB), an X-side tape carrier package (hereinafter, X-TCP) that electrically connects the liquid crystal panel and the X-PCB to supply a desired signal voltage to the liquid crystal panel. , A Y-side tape carrier package (hereinafter abbreviated as Y-TCP) that electrically connects the liquid crystal panel and the Y-PCB to supply a desired scanning signal to the liquid crystal panel, and liquid crystal. A metal bezel including an opening corresponding to an effective display area of the panel, a resin frame for sandwiching and fixing the liquid crystal panel between the bezel, and a surface light source device are attached to the frame. In such a liquid crystal display device, a screw or the like is inserted from the main surface side of the bezel, and the liquid crystal display device is engaged and fixed to a resin frame via the X-PCB or the Y-PCB.

[0004]

According to such a structure, it is necessary to dispose the metal screw groove engaged with the screw in the resin frame. However, the number of parts is increased or the member is Leading to higher costs. Further, although it is possible to directly engage with the resin frame by using a self-tapping type screw, foreign matter such as dust is generated, which causes display failure.

Further, in the above-mentioned conventional liquid crystal display device,
Since the lamp cover and the like of the surface light source device are fixed to the frame, it is necessary to fix them from the back side of the liquid crystal display device by screwing or the like. Therefore, fixing with screws etc.
Since it is necessary to perform the operation from both the front surface and the back surface of the liquid crystal display device, the workability thereof is significantly reduced and the productivity is impaired. The present invention has been made in view of the above technical problems, and an object thereof is to provide a flat display device having a reduced number of parts and excellent workability.

[0006]

According to a first aspect of the present invention, there is provided a display panel having a substantially quadrangular shape having one main surface as a display surface, and the display surface having a substantially quadrangular shape corresponding to the display panel. A bezel including an opening that exposes a bezel including a bezel hole in the vicinity of a corner, and a frame that holds the display panel between the bezel and the bezel that is arranged on the panel back surface facing the display surface of the display panel; A flat display device, comprising: a drive circuit board for driving the display panel, the drive circuit board being disposed on a back surface of the frame facing the display panel, wherein the frame has a frame through hole at a position corresponding to the bezel hole of the bezel. And, the drive circuit board includes a board through hole at a position corresponding to the bezel hole of the bezel, the board through hole from the drive circuit board side toward the bezel, Serial frame through holes and interposed in the bezel bore the driving circuit board, in the plane display device characterized by comprising a fixing means for fixing the frame and the bezel.

According to a second aspect of the present invention, there is provided a flat panel display device characterized in that the bezel hole according to the first aspect includes a thread groove, and the fixing means is a screw engaging with the thread hole. The invention according to claim 3 is the flat display device, wherein the bezel hole according to claim 1 is formed in a recessed portion recessed toward the frame.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A liquid crystal display device according to an embodiment of the present invention will be described in detail below with reference to FIGS. As shown in FIG. 3, the liquid crystal display device (1) has a liquid crystal material held between a pair of electrode substrates (13) and (15), as shown in the exploded perspective view of FIG. The liquid crystal panel 11 includes a substantially square liquid crystal panel 11 having a 1-inch size effective display area 11a. Also, this liquid crystal display device
(1) is an X-PCB (21) for generating control signals such as clock signals, video data and driving voltage, Y-PCB (31) for distributing control signals such as clock signals and driving voltage, liquid crystal panel Eight X-TCPs (41a) and (41b) which electrically connect (11) and X-PCB (21) to supply a desired signal voltage based on a control signal and video data to the liquid crystal panel (11). ), (41
c), (41d), (41e), (41f), (41g), (41h), liquid crystal panel (11)
And Y-PCB (31) are electrically connected and liquid crystal panel (11)
4 Ys that supply the desired scanning signal based on the control signal to
-Includes TCP (51a), (51b), (51c), (51d).

The liquid crystal display device (1) comprises a box-shaped metal bezel (61) including an opening (61a) corresponding to the effective display area (11a) of the liquid crystal panel (11), and further, FIG. Light guide plate (71) made of acrylic and having a scatterer formed on the back side,
A tubular light source (73) disposed along one side of (71) and a light guide plate (71) that covers the tubular light source (73) and emits light from the tubular light source (73).
The built-in surface light source device consisting of the reflective film (75) that effectively guides the liquid crystal panel (11) to the bezel (61).
It includes a resin frame (81) for holding and fixing.

Then, as shown in FIG. 1, the liquid crystal display device (1) has screws (101
It is engaged and fixed by a), (101b), (101c) and (101d). Further, this structure will be described in detail.

In this embodiment, the bezel (61) has concave portions (63a), (63b), (63c), (63), which are concave portions so as to be sufficiently close to the frame (81) at each of the four corners. 63d) (see FIG. 2), each of the recesses (63a), (63b), (63c), (63d) projecting toward the surface side, and the hole part in which the screw groove is formed on the projecting inner surface side. Includes (65a), (65b), (65c), (65d).
Also, the holes (65a), (65b), (65c), (65d) of this bezel (61)
In the frame (81) corresponding to the above, the frame through holes (81a), (81b), (81c), (81
d) are formed respectively.

Each of the eight X-TCPs (41a), (41b), ..., (41h) has an output end side electrically connected to the liquid crystal panel (11) and an input end side made of a resin frame ( It is bent on the back side of the liquid crystal panel (11) so as to wrap around 81). Similarly, each of the four Y-TCPs (51a), ..., (51d) has an output end electrically connected to the liquid crystal panel (11) and an input end enclosing a resin frame (81). LCD panel (1
It is bent to the back side of 1). And X-PCB
Each of (21) and Y-PCB (31) is a liquid crystal panel (11).
The frame (81) is arranged on the back surface side of the.

Further, the hole portion of the bezel (61) of the X-PCB (21)
X at the position corresponding to (65b) and the frame through hole (81b).
-PCB through hole (21b) and also hole (65d) in bezel (61)
And X-PC at the position corresponding to the frame through hole (81d)
B notches (21d) are formed respectively. Also, Y
-Y at the positions corresponding to the holes (65c) and (65d) of the bezel (61) of the PCB (31) and the frame through holes (81c) and (81d).
-PCB through holes (31c), (31d) are arranged respectively.

Then, from the back side of the liquid crystal display device (1),
As shown in FIG. 2, the screw (101a) is inserted into the hole (65d) of the bezel (61) through the lamp cover (91) and the frame through hole (81a).
Are engaged. In addition, from the rear surface side of the liquid crystal display device (1), the X-PCB through hole (21b) and the frame through hole (81b)
The screw (101b) is engaged with the hole (65b) of the bezel (61) via the. Further, from the rear surface side of the liquid crystal display device (1), through the lamp cover (91), the Y-PCB through hole (31c) and the frame through hole (81c), into the hole (65c) of the bezel (61) with a screw ( 101
c) is engaged. Further, from the rear surface side of the liquid crystal display device (1), the X-PCB notch (21d) and the Y-PCB through hole are formed.
The screw (101d) is engaged with the hole (65d) of the bezel (61) through the (31d) and the frame through hole (81c).

In this embodiment, the X-PCB (21)
And each gland of Y-PCB (31) is screw (101
b), (101c), (101d) through the frame (61) to the bezel (6
It is configured to be electrically connected to 1).

As described above, according to the liquid crystal display device (1) of this embodiment, each of the X-PCB (21) and the Y-PCB (31) for driving the liquid crystal panel (11) is Since it is arranged on the back surface side of the liquid crystal panel (11) via the frame (81), the frame can be formed narrower than the effective display area (11a).

In this embodiment, the liquid crystal panel (11)
Are arranged between the bezel (61) and the frame (81), and are tightened by a total of four screws (101a), ..., (101d) arranged at the corners of the bezel (61) and the frame (81). Held and fixed. Moreover, since all of the screws (101a), ..., (101d) are inserted and engaged from the back surface side of the liquid crystal display device (1), the assembling workability is excellent and the productivity can be improved. Further, since the screws (101a) and (101b) also serve to fix the lamp cover (91), the screws used for assembly are arranged at the corners.
I was able to hold it down to a book. Here, screws (101a), (101
Although b) is also used to fix the lamp cover (91), considering the replacement work due to the life of the tubular light source (73), only fixing the lamp cover (91), assembling screws (101a), ... ,(Ten
Separate screws from 1d) may be used.

Similarly, when repairing the liquid crystal display device (1), for example, if a foreign matter is present between the liquid crystal panel (11) and the frame (81), display failure will occur, but in such a case as well, 4 screws (101a) from the back of the liquid crystal display (1),
, (101d) can be easily disassembled, and foreign matter present between the liquid crystal panel (11) and the frame (81) can be removed in a short time.

Further, in this embodiment, the screws (101a), ...,
Since the groove that engages with (101d) is formed on the inner surface of the hole (65b) formed by projecting from the bezel (61), there is no increase in the number of parts due to this structure.

In this embodiment, the liquid crystal display device (1)
Since screws (101a), ..., (101d) are inserted from the back surface side of the, the bezel (61) is screwed (101a), ..., as shown in FIG.
(101d) projects. However, the screws (101a),…, (10
The holes (65a), ..., (65d) of the bezel (61) that engage with 1d) are the recesses (63a), ..., Of the bezel (61) recessed toward the frame (81) side.
Since it is formed in (63d), as you can see from Fig. 2, screw
(101a), ..., (101d) do not project on the main plane of the bezel (61). Therefore, the appearance of the liquid crystal display device (1) is not impaired and the distance between the bezel (61) and the frame (81) can be shortened, so that the alignment can be easily performed.

In this embodiment, the screws (101a), ..., (101d)
In addition to this, the method of fixing was adopted.
An engaging pin having an elastic tip as shown in FIG. 6 or an engaging pin having an open leg as shown in FIG. However, in consideration of workability and repairability, a screw is suitable as the fixing means. Further, although the liquid crystal display device has been described as an example in this embodiment, the present invention is also useful for various flat display devices such as a plasma display device and an EL display device.

[0022]

According to the flat display device of the present invention, the number of parts can be reduced, and the workability can be greatly improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line AA ′ in the liquid crystal display device of FIG.

3 is a schematic cross-sectional view taken along line BB ′ in the liquid crystal display device of FIG.

FIG. 4 is a schematic front view of a fixing means according to another embodiment of the present invention.

[Explanation of symbols]

 (1) ... Liquid crystal display (61) ... Bezel (21) ... X-PCB (31) ... Y-PCB (63a), (63b), (63c), (63d) ... Recesses (65a), (65b) ), (65c), (65d)… Hole (81)… Frame (81a), (81b), (81c), (81d)… Frame through holes (101a), (101b), (101c), (101d) ) …screw

Claims (3)

[Claims] 1. A display panel having a substantially quadrangular shape having one main surface as a display surface, an opening having a substantially quadrangular shape corresponding to the display panel and exposing the display surface, and a bezel hole near a corner. A bezel, a frame arranged on the back surface of the panel facing the display surface of the display panel and holding the display panel between the bezel, and the display panel arranged on the back surface of the frame facing the display panel And a drive circuit board for driving the flat display device, wherein the frame includes a frame through hole at a position corresponding to the bezel hole of the bezel, and a position corresponding to the bezel hole of the bezel. The drive circuit board includes a board through hole, and is inserted into the board through hole, the frame through hole, and the bezel hole from the drive circuit board side toward the bezel. A flat display device comprising: a drive circuit board; a fixing means for fixing the frame and the bezel. 2. The flat display device according to claim 1, wherein the bezel hole includes a thread groove, and the fixing means is a screw engaging with the thread hole. 3. The flat panel display device according to claim 1, wherein the bezel hole is formed in a recessed portion recessed toward the frame.