JPH1130786A - Flat panel display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce assembly man-hour and the number of parts for storing a display panel in a frame structure by providing the frame with a part for placing the display panel and a part for engaging with the periphery of the display panel and for fixing it. SOLUTION: An integrated frame 1 is provided with an engaging part 12, which is for fixing a display panel 2 and which is nearly inverted-L shaped in the cross section, on the three sides of a roughly rectangular placing base 11. The tip end of the engaging part 12 is pressed downward, fixing the display panel 2 by pressurizing its periphery. The display panel 2 comes into contact at its end face with the base of the engaging part 12, on the three sides 2b, 2b', 2c, thereby preventing positional deviation at or above a designed range in these directions. In addition, on the short side 2a on the input cable side of the display panel 2, the end face is in contact with a stopper 13 projectingly installed on the placing base 11, thereby similarly preventing positional deviation at or above the designed value to the input cable side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat display device having a display panel such as a liquid crystal panel held in a frame structure, and more particularly to a flat display device integrally including a driving circuit.

[0002]

2. Description of the Related Art In a flat panel display device, generally, a display is formed by a substantially frame-shaped metal cover frame (bezel cover) on a display surface side (upper side) and a resin base frame on a back side (lower side). The panel is clamped and fixed. The resin base frame is usually equipped with a backlight,
On its lower surface, for example, a lamp cover and a printed board are arranged. In the backlight, a tubular lamp is arranged on one end of a light guide plate, and a linear light source is used as a surface light source.

[0003] The metal cover frame, the resin base frame, the lamp cover, and the printed circuit board constitute the frame structure of the flat panel display. For example, it is joined by screwing at the four corners of the flat display device. Also,
A caulking device is used if necessary. At the time of such assembling, the joint between the display panel or the backlight and the frame,
In addition, a double-sided tape and a rubber seal are provided at the joint between the frames to prevent dust from entering from the joint and to fix the frames to each other. Also, in order to absorb the difference in the coefficient of thermal expansion between the frame and the display panel, provide a play interval,
The display panel is held by the frame structure through a plurality of elastic members.

[0004]

With the above-described frame structure, the number of components and holding components constituting the frame structure is large, and many work steps are required for assembling the flat panel display.

In view of the above problems, the present invention provides a flat display device in which a display panel is housed and held in a frame structure. The flat panel display can reduce the number of assembly steps and the number of parts for housing the display panel in the frame structure. A display device is provided.

[0006]

According to a first aspect of the present invention, there is provided a flat panel display device comprising a display panel integrally including a drive circuit unit and a frame holding the display panel.
A mounting portion on which the frame mounts the display panel,
A flat panel display device comprising: an engaging portion disposed on an upper surface of the peripheral portion of the placement portion for engaging with a peripheral portion of the display panel and fixing the display panel.

[0007] With the above configuration, the number of parts and the number of assembly steps of the frame can be reduced.

A second aspect of the present invention is the flat display device according to the first aspect, wherein the engaging portion holds the display panel between the flat panel display device and the mounting portion.

With the above configuration, the number of steps for assembling the frame can be further reduced.

According to a third aspect, in the flat display device according to the first aspect, the display panel is inserted between the engaging portion and the mounting portion along the mounting portion. The flat display device is characterized in that:

According to a fourth aspect of the present invention, in the flat display device according to the first aspect, the display panel includes a wiring board for achieving an electrical connection with an external circuit, and the engaging portion corresponds to the wiring board. A flat display device characterized by being arranged at a position other than the position where

With the above configuration, even when the wiring board is connected and protruded, the display panel can be sufficiently fixed by engaging with a region other than this position.

According to a fifth aspect of the present invention, in the flat panel display according to the first aspect, the display panel includes four main sides, and the engaging portions correspond to at least three sides of the display panel, and the length of each side is set. Is substantially equal to the flat display device.

According to the above configuration, the display panel is securely fixed to the frame.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
3 will be described.

FIG. 1 is an external perspective view of a flat display device according to an embodiment. FIG. 2 is a longitudinal sectional view of the flat panel display according to the embodiment.

The flat panel display 10 has a display panel 2 housed in an integrated frame 1.

The display panel 2 includes an effective display area having a diagonal size of 12.1 inches and a liquid crystal layer held between a pair of glass substrates. And (800 × 3) × 60
0, and each display pixel includes a pixel electrode disposed between a signal line and a scanning line via a switching element (TFT) made of polycrystalline silicon.

The substantially rectangular display panel 2 has:
Along the one long side and one short side, an X-side drive circuit section 22 that supplies a video signal to a signal line and a Y-side drive circuit section 23 that supplies a scan signal to a scan line are provided as switching elements of each display pixel. In the same manner as described above, it is integrally formed by switching elements made of polycrystalline silicon and the like. For this reason, the display panel 2 has a short side (Y) to which the input cable 21 is connected.
3 sides other than the short side 2a on which the side drive circuit section 23 is disposed)
b, 2b ', and 2c have no external wiring or other components.

The integral frame 1 is an integrally molded product made of hard rubber or resin, and has a substantially L-shaped cross section for fixing the display panel 2 to three sides of a substantially rectangular mounting table 11. A joining portion 12 is provided.

In the illustrated example, three engagement portions 12b and 12
b ′ and 12c are engaged with three sides 2b, 2b ′ and 2c of the display panel 2 other than the short side on the input cable side, respectively. Each of the three engaging portions 12b, 12b ', and 12c has a linear shape slightly shorter than the side of the display panel to be engaged, and engages with each of the three sides of the display panel in the entire region except for both ends thereof. I do.

The tip of the engaging portion 12 is urged downward, and presses and fixes the peripheral portion of the display panel 2. In the illustrated example, the tip of the engagement portion 12 presses the upper surface of the upper glass substrate of the display panel 2. In the illustrated example, the tip of the engagement portion 12 is tapered,
This is for facilitating the mounting of the display panel 2 from above.

The display panel 2 includes the three sides 2b, 2b ',
In 2c, the end face abuts against the root of the engagement portion 12, thereby preventing the displacement in these directions beyond the design value range. On the input cable side short side 2 a of the display panel 2, the end face abuts against the stopper 13 protruding from the mounting base 11, thereby similarly displacing the input cable side to a design value or more. Is prevented.

In order to mount the display panel 2 on the integrated frame 1, the display panel 2 is pressed with a sufficient force from above (display surface side). The display panel 2 may be pressed evenly with the display panel 2 kept horizontal. However, in order to reduce the required pressing force, one corner of the display panel 2 is pushed in first, and the corners are engaged in order from the one closer to the corner. The joint 12 can be inserted by expanding the joint. Further, for example, one end (for example, the end 2c far from the input cable side) may be inserted first, and then the whole may be similarly mounted.

When it is necessary to remove the display panel 2 from the frame 1, the display panel 2 can be pulled out with the engagement portion 12 being extended outward in the horizontal direction. In some cases, the stopper 13 is cut off,
The display panel 2 can be pulled out to the input cable side. In this case, the cut-off stopper portion 13 can be fixed to the original position by an adhesive or the like.

As shown in the vertical sectional view of FIG. 2, a backlight 15 and a PCB storage section 16 are provided below the integrated frame 1. PCB3 for driving display panel
Is wrapped in the aluminum laminate film 31,
It fits in the PCB storage unit 16. The PCB 3 and the display panel 2 are connected by an input cable 21. The aluminum laminate film 31 is formed by laminating an insulating film such as a PET film on both sides via an adhesive layer with an aluminum foil having a sufficient thickness such as 20 μm as a core layer. As described above, since the PCB 3 which is a source of electromagnetic noise is wrapped by the aluminum laminate film 31, most of the electromagnetic noise is suppressed. In order to further suppress the generation of electromagnetic noise, the drive circuit units 22 and 23 and the input cable 21 are also covered with the aluminum laminate film 31.

FIG. 3 is a schematic longitudinal sectional view showing a portion where the liquid resin 4 is arranged. In order to prevent dust from entering between the frame 1 and the display panel 2, a quick-drying silicone resin is applied to a portion where the end of the display panel 2 and the frame 1 are in contact.

According to the above embodiment, the number of parts and the number of assembling steps in the frame structure for accommodating the display panel can be substantially minimized.

(Second Embodiment) FIGS. 4 and 5 show a flat panel display device 20 according to a second embodiment.

As shown in the plan view of FIG. 4, in the flat display device 20 of this embodiment, two driving film wiring boards 25 are connected to the X-side (long side) drive circuit section 22. I have. Further, the four circumferences of the display panel 2 are engaged with and fixed to the engaging portions 12 in all regions except for the region where the film wiring board 25 is arranged and the corners of the display panel.

As shown in the longitudinal sectional view of FIG.
At the periphery of the display panel 2 presses a shelf-like portion where the lower glass substrate protrudes from the upper glass substrate. The distal end surface of the engaging portion 12 is flat and not tapered. In FIG. 5, illustration of the backlight and the PCB is omitted.

When the display panel 2 is mounted on the frame 1, first, the long side 2c on the side where the film wiring board 25 is not disposed is inserted into the engaging portion 12c. Next, the display panel 2
Is pressed from above, the short sides 2b on both sides of the display panel 2 are sequentially engaged with the corresponding engagement portions 12b from the end. Finally, the film wiring board side edge 2a
When the three engagement portions 12a corresponding to are spread outward, the mounting is completed.

In order to facilitate such mounting operation,
The width of the horizontally protruding portions of the engagement portions 12b on both short sides is small on the side far from the film wiring board, and gradually increases toward the film wiring board (FIG. 4).

In this embodiment, the same effects as in the first embodiment can be obtained.

(Third Embodiment) FIGS. 6 and 7 show a flat panel display 30 according to a third embodiment.

As shown in FIG. 6, in this embodiment,
Engaging portions 12 are formed on all three sides of the frame 1, and the display panel 2 is slidably inserted from the remaining one side (short side) during assembly. After the insertion is completed, a detachable stopper 14 is mounted on the mounting table 11 to regulate the position of the display panel 2 toward the near side in the insertion direction.

As shown in FIG. 7, the engaging portion 12 in this embodiment has a tapered front end surface, and presses and fixes the ridge of the display panel 2.

In this embodiment, the same effects as in the first and second embodiments can be obtained.

(Fourth Embodiment) FIGS. 8 and 9 show a flat panel display 40 according to a fourth embodiment.

In this embodiment, in the same configuration as that of the third embodiment, engaging portions 12 are formed on three sides except one long side, and the display panel 2 is inserted from this one long side.

As shown in FIG. 9, the engaging portion 12 in this embodiment has a taper whose tip is sharpened downward, and the ridge of the taper presses the upper surface of the peripheral portion of the display panel 2. .

In this embodiment, the same effects as in the above embodiment can be obtained.

(Modification of Third Embodiment) FIG. 10
(A) and (b) show modifications 30a and 30b, respectively, of the third embodiment.

In these modified examples, the distance between the portions 12b and 12b 'along both long sides of the engagement portion 12 is different between the near side and the back side when the display panel 2 is inserted. FIG.
In a modified example 30a shown in FIG.
In the modification 30b shown in FIG. 13B, the interval is narrow on the back side. The display panel 2 has the narrowed portions 12b, 1 along the long sides.
2b 'is sandwiched and fixed.

In the above-described embodiments and modifications, in order to impart electromagnetic wave shielding properties, a structure in which an electromagnetic wave shielding cover is fitted to the outside of a rubber or resin frame may be employed. Alternatively, an aluminum laminate film can be attached and placed, and a metal layer can be formed on the outer surface of the frame by vapor deposition or sputtering.

[0046]

According to the flat display device in which the display panel is held in the frame structure, the number of parts and the number of assembling steps of the frame structure can be minimized.

[Brief description of the drawings]

FIG. 1 is a schematic external perspective view of a flat panel display according to a first embodiment.

FIG. 2 is a schematic longitudinal sectional view of the flat panel display according to the first embodiment.

FIG. 3 is a partial vertical cross-sectional view schematically illustrating a portion where a liquid resin for sealing is arranged in the flat panel display according to the first embodiment.

FIG. 4 is a plan view (an external view from a display surface side) of a flat panel display device according to a second embodiment.

FIG. 5 is a schematic longitudinal sectional view of a flat panel display according to a second embodiment.

FIG. 6 is a schematic external perspective view of a flat panel display according to a third embodiment.

FIG. 7 is a schematic longitudinal sectional view of a flat panel display according to a third embodiment.

FIG. 8 is a schematic external perspective view of a flat panel display according to a fourth embodiment.

FIG. 9 is a schematic longitudinal sectional view of a flat panel display according to a fourth embodiment.

FIG. 10 is a plan view for explaining a modification of the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Integrated frame 2 Display panel 3 PCB 4 Liquid resin for sealing 11 Mounting table part 12 Engagement part 13 Stopper part 21 Input cable 22 X side drive circuit part 23 Y side drive circuit part 31 Aluminum laminated film

Claims (5)

[Claims] A display panel integrally including a drive circuit unit;
In a flat panel display device provided with a frame holding the display panel, the frame includes a mounting portion on which the display panel is mounted,
A flat panel display, comprising: an engagement portion disposed on an upper surface of the peripheral portion of the mounting portion for engaging with a peripheral portion of the display panel and fixing the display panel. 2. The flat display device according to claim 1, wherein the engaging portion holds the display panel between the mounting portion and the mounting portion. 3. The flat display device according to claim 1, wherein the display panel is provided between the engaging portion and the mounting portion.
The flat display device, wherein the flat display device is inserted along the mounting portion. 4. The flat panel display according to claim 1, wherein the display panel includes a wiring board for achieving an electrical connection with an external circuit, and the engaging portion is arranged at a position other than a position corresponding to the wiring board. A flat display device characterized by being performed. 5. The flat panel display according to claim 1, wherein the display panel includes four main sides, and the engaging portions correspond to at least three sides of the display panel, and have a length substantially equal to the length of each side. A flat panel display characterized by the following.