JP2002351349A - Flat panel display - Google Patents

Abstract

(57) [Summary] To provide a liquid crystal display device capable of easily confirming a connection state of a connector. A liquid crystal cell (12) and a backlight (14) are housed in a frame (28), an upper surface of the liquid crystal cell (12) is covered with a front bezel cover (64), a lower surface is covered with a back bezel cover (62), and a connector of a control circuit board (44). Confirmation holes 70 and 72 are opened at positions of the back bezel cover 62 corresponding to 52 and 55.

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 such as a liquid crystal display device.

[0002]

2. Description of the Related Art A liquid crystal display device has a structure in which a backlight is provided on the lower surface of a liquid crystal cell, and the liquid crystal cell and the backlight are housed in a synthetic resin frame. The liquid crystal cell, the backlight, and the frame are covered with a metal bezel cover. In this case, a circuit board for driving the liquid crystal cell is disposed on the lower surface of the frame (Japanese Patent Laid-Open No. 2000-314883).

[0003]

In a liquid crystal display which is one of the liquid crystal display devices, a control signal and an image signal from a personal computer are directly input and displayed on the liquid crystal display device. One provided with a control circuit board has been proposed.

In this case, a back bezel cover is provided on the back surface of the above-described bezel cover (hereinafter referred to as a front bezel cover) for measures against electromagnetic waves and strength.
The control circuit board is arranged on the lower surface of the frame located inside the back bezel cover.

When the control circuit board is disposed inside the back bezel cover as described above, the control circuit board and the circuit board for displaying the liquid crystal cell are connected by a cord with a connector. I have. However, if the connection of this connector is bad, the liquid crystal display will not operate normally.

However, since all the circuit boards are covered with the back bezel cover, the connection of the connector cannot be confirmed after the assembly is completed, and it has been difficult to detect the connection failure.

Accordingly, the present invention has been made in view of the above-mentioned problems, and has as its object to provide a flat display device capable of easily confirming a connection state of a connector.

[0008]

According to a first aspect of the present invention, there is provided a flat display device comprising a display cell and a backlight housed in a frame, and a circuit board for displaying the display cell disposed on a lower surface of the frame. A portion other than the display surface of the display cell housed in the frame is covered with a frame-shaped first bezel cover, and a lower surface of the frame is covered with a second bezel cover, and the portion corresponding to a connector connection portion of the circuit board is provided. A flat display device characterized in that a confirmation hole is opened at the position of the second bezel cover.

According to a second aspect of the present invention, the circuit board includes a signal line side circuit board for supplying an analog image signal to a signal line of the display cell, and a scanning line side for supplying a gate signal to a scanning line of the display cell. A circuit board, a lighting circuit board for lighting the backlight lamp, and a control circuit for supplying at least a digital image signal, a control signal, and power to the signal line side circuit board, and for supplying power to the lighting circuit board Board, the signal line side circuit board and the control circuit board, and the lighting circuit board and the control circuit board,
2. The confirmation holes are connected to connection members having connectors, respectively, and the confirmation holes are respectively opened at positions of the second bezel cover corresponding to the respective connectors.
It is a flat display device of description.

According to a third aspect of the present invention, the signal line side circuit board and the scanning line circuit board are connected by a connecting member having a connector, and the signal line side circuit board is connected to a position of the second bezel cover corresponding to the connector. The flat display device according to claim 2, wherein the confirmation hole is opened.

According to the flat display device of the present invention, even if the lower surface of the frame is covered with the second bezel cover, the confirmation hole is opened at the position of the second bezel cover corresponding to the connector connection portion of the circuit board. Therefore, the operator can confirm the connection state of the connector from the confirmation hole.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display 10 according to one embodiment of the present invention will be described below with reference to FIGS.

The liquid crystal display device 10 is used by being housed inside a liquid crystal display 1 for displaying a screen of a personal computer or the like as shown in FIG.

FIG. 1 is a bottom view of the liquid crystal display device 10, and FIG. 3 is a top view.

As shown in FIGS. 3 and 5, the liquid crystal display device 10 has a backlight 14 on the lower surface of a liquid crystal cell 12. The backlight 14 includes two lamps 18 and 20 each including a light guide plate 16 and a straight tubular cold-cathode tube disposed along the longitudinal direction of the light guide plate 16 (hereinafter, referred to as an X direction).
Are arranged on the lower surface of the light guide plate 16. Further, the liquid crystal cell 1 is provided on the upper surface of the light guide plate 16.
An optical sheet 24 for uniformly irradiating light from the light guide plate 16 to the light guide plate 2 is provided. A reflector 26 for reflecting the light of the lamps 18 and 20 and sending the light to the light guide plate 16 is provided around the lamps 18 and 20.

The liquid crystal cell 12 and the backlight 14 are housed in a synthetic resin frame 28. The frame 28 has a box shape having a storage recess 30 for storing the liquid crystal cell 12 and the backlight 14, and has a rectangular bottom plate 31.
, Four side walls 32a, 32b, 32c, 32d are erected. Of these, the opposite side walls 30 in the Y direction
The mounting portions 40a, 40b are provided outward from the upper ends of the a, 30b. Further, outer walls 41a, 41b are vertically provided from the outer ends of the mounting portions 40a, 40b. Also, X
Mounting part 40 inward from the upper end of the side wall 32d in the direction.
d is provided. Then, as shown in FIG. 4, the lamps 18, 20 and the reflector 26 are arranged in a space formed by the side wall 32d and the mounting portion 40d.

In the X direction of the liquid crystal cell 12, the liquid crystal cell 12
8 X for supplying an analog image signal to the signal lines of
Side TCP (tape carrier packag)
e) Eight 34 are arranged, and an X-side flexible substrate (hereinafter, referred to as an X-side flexible substrate)
(Referred to as X-side PCB) 36. Then, as shown in FIG. 4, the X-side TCP 34 is bent along the side surface 32c, and the X-side PCB 36 is disposed on the lower surface of the frame 28.

On the other hand, in the Y direction of the liquid crystal cell 12, five Y-side TCPs 38 for supplying gate signals to the scanning lines of the liquid crystal cell 12 are arranged, and as shown in FIG. It is arranged in.

Further, on the lower surface of the frame 28, a lighting circuit board 42 constituting an inverter circuit which is a lighting circuit for the lamps 18 and 20 is arranged.

A control circuit board 44 for inputting and controlling a signal from a personal computer in order to display the liquid crystal display 1 in response to a signal from the personal computer, which is a feature of the liquid crystal display device 10, comprises a central portion on the lower surface of the frame 28. It is arranged in.

Next, the connection state of each circuit board will be described.

The Y-side TCP 38 and the X-side PCB 36 are connected by a flexible board 46. In this case, the connector 4 is attached to the X-side PCB 36 of the flexible substrate 46.
8 are provided.

The X-side PCB 36 and the control circuit board 44 are connected by a flexible board 50, and the connector 52
It is provided on the side PCB 36.

The lighting circuit board 42 and the control circuit board 44 are connected by a cord 54, and the connector is provided on the control circuit board 44.

The lamps 18, 20 and the lighting circuit board 42 are connected by cords 56, 57, and their connectors 58, 6
0 is provided on the lighting circuit board 42.

As described above, the circuit boards are arranged on the frame 28. The frame 28 is housed in the box-shaped back bezel cover 62. Then, the liquid crystal cell 12, the backlight 14, and the
The frame 28 is covered with a front bezel cover 64 having an upper surface formed in a frame shape, and screwed.

Thus, portions other than the display surface of the liquid crystal cell 12 are covered with the front bezel cover 64 and the back bezel cover 62 made of metal. Therefore, it is possible to prevent the electromagnetic waves from leaking to the outside, and it is possible to perform transportation and the like in this state. Then, the liquid crystal display device 10 in this state
Is stored in the case 66 of the liquid crystal display 1 shown in FIG.

By the way, in order to confirm that the connectors 48, 52, 58, 60 are securely connected to the respective circuit boards, as described in the prior art, the position of the back bezel cover 62 corresponding to each connector is set. Circular confirmation hole 68-74
Is open.

More specifically, as shown in FIG.

A first confirmation hole 68 is opened at a position of the connector 48 of the flexible board 46 for connecting the X-side PCB 36 and the Y-side TCP 38.

At the position of the connector 52 of the flexible board 50 for connecting the control circuit board 44 and the X-side PCB 36,
The second confirmation hole 70 is open.

A third confirmation hole 72 is opened at a position of the connector 55 of the cord 54 connecting the control circuit board 44 and the lighting circuit board 42.

Codes 56 and 57 from the lamps 18 and 20
A fourth confirmation hole 74 is opened at the position of the connectors 58 and 60 at the tip of the connector.

Thus, even after the rear bezel cover 62 is attached, the operator can easily confirm the connection state of each connector through the confirmation holes 68 to 74, so that a connection failure of the connector can be easily found. The occurrence of defective products can be prevented.

Further, a connection hole for inserting and connecting a wiring cord for transmitting a power supply from the personal computer, a control signal, and an operation signal for the liquid crystal display device 10 to the control circuit board 44 is formed in the back bezel cover 62. 76, 78 and 80 are open.

The confirmation holes 68 to 74 and the connection holes 76 to 80 opened in the back bezel cover 62 also have an effect as heat dissipation holes, and further contribute to the weight reduction of the back bezel cover 62. .

The positions and shapes at which the confirmation holes 68 to 74 are opened may be provided corresponding to the positions of the connectors to be connected, and are not limited to the positions described above. Further, the confirmation holes 68 to 74 are not limited to a circle but may be a rectangle or a triangle.

[0038]

As described above, according to the flat display device of the present invention, since the confirmation hole is opened in the second bezel cover,
The connection state of the connector can be easily checked, and the connection failure of the connector can be prevented.

[Brief description of the drawings]

FIG. 1 is a bottom view of a liquid crystal display device showing one embodiment of the present invention.

FIG. 2 is a bottom view of the liquid crystal display device with a back bezel cover removed.

FIG. 3 is a top view of the liquid crystal display device.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a sectional view taken along line BB in FIG. 1;

FIG. 6 is a perspective view of a liquid crystal display housing the liquid crystal display device of the present embodiment.

[Explanation of symbols]

 Reference Signs List 10 liquid crystal display device 12 liquid crystal cell 14 backlight 28 frame 34 X-side TCP 36 X-side PCB 38 Y-side TCP 42 lighting circuit board 44 control circuit board 46 flexible board 48 connector 50 flexible board 52 connector 54 code 55 connector 56 code 58 connector 60 Connector 62 Back Bezel Cover 64 Front Bezel Cover 68 Confirmation Hole 70 Confirmation Hole 72 Confirmation Hole 74 Confirmation Hole

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H089 HA40 QA09 QA12 2H091 FA41Z LA09 LA12 2H092 GA45 GA50 GA54 GA56 NA25 NA30 5G435 AA17 AA19 BB12 BB15 EE02 EE23 EE26 EE46

Claims (3)

[Claims] 1. A flat display device in which a display cell and a backlight are housed in a frame, and a circuit board for displaying the display cell is arranged on a lower surface of the frame, wherein the display of the display cell housed in the frame is performed. A portion other than the surface is covered with a frame-shaped first bezel cover, a lower surface of the frame is covered with a second bezel cover, and a confirmation hole is provided at a position of the second bezel cover corresponding to a connector connection portion of the circuit board. A flat panel display characterized by being open. 2. The circuit board, comprising: a signal line side circuit board for supplying an analog image signal to a signal line of the display cell; a scanning line side circuit board for supplying a gate signal to a scan line of the display cell; A lighting circuit board for lighting a lamp of a backlight, at least a digital image signal to the signal line side circuit board,
A control circuit board for supplying a control signal and power, and for supplying power to the lighting circuit board; the signal line side circuit board and the control circuit board; and the lighting circuit board and the control circuit board 2. The flat panel display device according to claim 1, wherein the confirmation holes are respectively opened at positions of the second bezel cover corresponding to the respective connectors. 3. 3. The signal line circuit board and the scanning line circuit board are connected by a connection member having a connector, and the confirmation hole is opened at a position of the second bezel cover corresponding to the connector. 3. The flat display device according to claim 2, wherein: