JPH09114389A - Planar display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the planar display device, which is compatible with various specifications, without increasing the thickness of the device by providing a specific circuit substrate, a wiring substrate and a connector, respectively. SOLUTION: A connection wiring substrate 1201 is constituted by arranging a copper film pattern on a heat resistant film made of polymide. A terminal 1201b of the substrate 1201 is soldered to the connection land of a first circuit substrate 441. A terminal 1201a is electrically and mechanically engaged to a first engaging section of a connection connector 1101. Moreover, a flexible wiring substrate 1001 from a computer device main body is electrically and mechanically engaged to a second engaging section of the connector 1101. Thus, a liquid crystal panel itself is easily and rapidly connected to the output position of the substrate 1001 from various computer device main body without making a design change of the panel itself and making the entire system useful in the display industries.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a flat display device represented by a liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, flat panel display devices, particularly liquid crystal display devices, have been used as various display devices for personal computers, word processors, television displays, etc., due to their characteristics of light weight, thinness, and low power consumption. It's coming.

As such a flat panel display device, for example, a liquid crystal display device disclosed in Japanese Utility Model Publication No. 6-33448 is known. This is because a plurality of TABs (Tape automated Bondin) are formed by mounting a liquid crystal panel and a driving IC that outputs a video signal voltage or a scanning pulse as a signal voltage to a signal line or a scanning line of the liquid crystal panel on a flexible substrate.
g) and a circuit board that electrically connects the TABs and outputs image data based on a driving signal such as a clock, image data, and power supply voltage that are input from the outside, and a control signal. Then, the circuit board and the TAB are housed within the thickness of the liquid crystal panel and are arranged on the tubular light source that constitutes the surface light source unit. It is disclosed.

[0004]

By the way, such a flat panel display device is used in a personal computer, a word processor or the like. For example, as shown in FIG.
As shown in (b), a connector (1501) for electrically receiving a flexible wiring substrate (1001) for transmitting signals from various device bodies constitutes one substrate (1) which constitutes the flat panel display device (1). 431) Implemented on.

The flexible wiring board (100
The connection position with 1) is determined in advance by the type of personal computer, word processor, or the like. For example,
In a personal computer, a flexible wiring board is used depending on the hinge position that connects the display surface and the keyboard board.
Since the layout position of (1001) is restricted, the connection position with the flexible wiring board (1001) is often determined accordingly. Therefore, even if the flat panel display device (1) has the same specifications, the flat panel display device (1) should be placed according to the specifications of the device due to the restrictions of the applicable device body.
There is no choice but to place it at an appropriate position on the left and right or the top and bottom.

However, it is very difficult to change the arrangement position of the connector (1501) to the left and right or the top and bottom of the flat display device (1), and it is unavoidable to newly design from the display panel itself. It was difficult to standardize the display panel. This is because the connector (1501) that receives the flexible wiring board (1001) has a height of about 2 mm even if it is thin, and the arrangement position is restricted by the thickness of the device.

The present invention has been made in view of the above technical problems, and an object of the present invention is to provide a flat panel display device which meets various specifications without impairing the thinning of the device.

[0008]

According to another aspect of the present invention, there is provided a display panel, a circuit board for controlling the display panel, one end electrically connected to the circuit board and the other end at a desired position. A wiring board extending to the wiring board, a first fitting section electrically connected to the other end of the wiring board, and a second fitting section electrically connected to another wiring board. A flat display device is provided with a connection connector for electrically connecting a substrate and the other wiring substrate.

According to a second aspect of the present invention, the wiring board and the one end of the wiring board are electrically connected to each other through solder or an anisotropic conductive material. On the display.

According to a third aspect of the present invention, the display panel includes an array substrate including a plurality of pixel electrodes arranged in a matrix, signal lines and scanning lines connected to the pixel electrodes via switch elements, 2. The flat panel display device according to claim 1, further comprising a counter substrate including a counter electrode facing the array substrate, and a liquid crystal layer disposed between the array substrate and the counter substrate.

A fourth aspect of the present invention is the flat display device according to the third aspect, wherein the circuit board is electrically connected to the signal line of the array substrate. The invention according to claim 5 is characterized in that the circuit board is electrically connected to the scanning lines of the array substrate.
In the flat display device described.

According to the flat panel display device of the present invention, one end is electrically connected to the circuit board and is electrically connected to the other end of the wiring board extending to the desired position. Since it is configured to include a connection connector including a second fitting portion that can be electrically connected, various wiring boards can be changed by changing the wiring board or the specification of the circuit board depending on the position of the wiring board from the main body. It is possible to easily meet the required specifications.

The electrical connection between the circuit board and one end of the wiring board is made by, for example, solder or an anisotropic conductive material, so that the thickness of the device can be further reduced. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to an embodiment of the present invention will be described below in detail with reference to the drawings.
FIG. 1A is a schematic front view of the liquid crystal display device of this embodiment,
FIG. 2B shows a schematic rear view of the liquid crystal display device.
It is configured to be electrically connected to the flexible wiring board (1001) from the computer main body which is led out to the lower right side with respect to the back surface of (1).

As shown in FIGS. 2 (a) and 2 (b), the liquid crystal display device (1) includes a thin film transistor (a thin film transistor) connected to a plurality of signal lines and scanning lines and signal lines and scanning lines on a glass substrate. Hereinafter, abbreviated as “TFT”), an array substrate (200) each including a pixel electrode connected to the TFT, and an opposing substrate (300) in which an opposing electrode and a color filter layer are respectively formed on a glass substrate, A liquid crystal panel (1) which is arranged so as to sandwich a liquid crystal material with an alignment film interposed therebetween.
00) is included.

The liquid crystal panel (100) has a display area.
(3) It is sandwiched between the first frame (500) made of a box-shaped metal including the opening (501) corresponding to (see FIG. 1) and the second frame (600) of a resin frame body, and is It is screwed and held at four diagonal points.

The second frame (600) includes a wedge-shaped light guide plate (801) made of acrylic resin and a light guide plate (801).
And a tubular light source (851) disposed near one end surface of the. Although not shown, the light guide plate (801) is not shown in the liquid crystal panel (10).
On the side opposite to (0), a milky white print pattern that selectively guides the light source light from the tubular light source (851) to the liquid crystal panel (100) is included. Instead of this print pattern, a light scattering groove or the like may be integrally formed. This resin second frame (6
00) is composed of an integrated type or a divided type. Further, in order to efficiently guide the light source light from the tubular light source (851) to the light guide plate (801), a reflective film (861) is arranged so as to wrap the tubular light source (851) in the light guide plate (801). The tubular light source (851) and the reflective film (861) are protected by a lamp cover (901) having an L-shaped cross section.

Further, the second frame (600) holds the first circuit board (441) on the back surface side of the region corresponding to the thin side of the light guide plate (801) by the engaging claws (611), and Y for controlling the scan pulse applied to the scan line of the liquid crystal panel (100)
Supports the driver board (431).

This first circuit board (441) is a desired drive voltage based on the basic clock, the image data and the power supply voltage input from the computer device main body via the flexible wiring board (1001) (see FIG. 1). , Which controls the video signal voltage output to the signal line of the liquid crystal panel (100) and the interface circuit that outputs the drive voltage and the control signal to the Y driver board (431), respectively, while outputting the image data string and the control signal. The driver circuit and the driver circuit are integrally arranged.

The Y driver board (431) and the first circuit board (441) are arranged so as to cross each other through the opening (621) of the second frame (600), and the boards (431), (441) of each other are arranged. The connectors (433) and (443) arranged above are fitted to each other for electrical connection.

The signal line in the liquid crystal panel (100) is drawn out only to one end side (201a) side of the array substrate (200), and the drive voltage from the first circuit board (441) is connected to the one end side (201a) side.
Based on the image data string and the control signal, X-TAB (401-1), (401-2), which supplies a video signal voltage as shown in FIG. 1,
The output terminals of (401-3) and (401-4) are electrically connected through an anisotropic conductive film. And each X-TAB (401-1), (401-
2), ..., (401-6) are bent to the back side of the liquid crystal panel (100), and their input terminals are anisotropic with respect to the first circuit board (441) held by the second frame (600). Electrically connected through the conductive conductive film.

Further, the scanning line in the liquid crystal panel (100) is drawn out only to the other end side (201b) side orthogonal to the one end side (201a) of the array substrate (200), and the Y driver board (431).
It is electrically connected to the output terminal of Y-TAB (411) which supplies the scanning pulse to the scanning line based on the driving voltage and the control signal from the device through the anisotropic conductive film. And Y-TA
The input terminal of B (411) is electrically connected to the Y driver substrate (431) supported by the second frame (600) through an anisotropic conductive film. The connection to each circuit board (421), (431) may be soldering.

The liquid crystal display device (1) of this embodiment is characterized in that the flexible wiring board (1001) from the computer main body is connected via the connection connector (1101) and the connection wiring board (1201). It is electrically connected to the first circuit board (441) of the liquid crystal display device (1).

In this embodiment, as shown in FIG. 3, the connection wiring board (1201) has a heat-resistant film (121) made of polyimide.
1) Copper foil pattern (1221) is placed on the top, one end of which
(1201b) is soldered on the connection land (445b) (see FIG. 4B) of the first circuit board (441) as shown in FIG. 1B, and the other end (1201a) is a connection connector (1101). First fitting part of
It is electrically and mechanically fitted to (1111). In addition, the flexible wiring board (1001) from the computer device body
Is electrically and mechanically fitted to the second fitting portion (1121) of the connection connector (1101).

More specifically, the first and second fitting portions (1111) and (1121) of the connection connector (1101) are connected to the connection wiring board (12
01) and flexible wiring board (1001) copper foil pattern (12
Support bottom with multiple grooves (1123) corresponding to (21), (1021)
(1125) and corresponding to each groove (1123), electrically connected and connected to the copper foil patterns (1221), (1021) of the connection wiring board (1201) and flexible wiring board (1001) A metal lead (1131) for electrically connecting the copper foil patterns (1221), (1021) of the wiring board (1201) and the flexible wiring board (1001) to each other, and a connection wiring board for the metal lead (1131). 1201) and the flexible wiring board (1001), and pressing walls (1151a) and (1151b) rotatably supported with respect to the side walls (1141a) and (1141b) so as to electrically connect to each other. . Also, the side walls supporting the pressing walls (1151a) and (1151b).
(1141a), (1141b), protruding in the pressing wall (1151a), (1151b) direction, is fitted to the pressing wall (1151a), (1151b), thereby connecting wiring board (1201) and flexible wiring board ( 1001
) Is a fitting claw (1143a) that electrically and mechanically fits and fixes
(1143b) is formed.

By configuring the liquid crystal display device (1) as described above, it is possible to easily cope with the position where the flexible wiring board (1001) is led out from various computer main bodies.

For example, a liquid crystal display device having the specifications of this embodiment
Assume that (1) is required to be electrically connected to the flexible wiring board (1001) from the computer main body, which is led to the lower left side of the back surface of the liquid crystal display (1).

In such a case, for example, as shown in FIG. 4 (a), the connection wiring board (1201) extends in the left-right direction from the configuration of the embodiment of FIG. 1 (a). It is possible to easily cope with the above without changing the design of the liquid crystal panel itself, etc.

Further, as shown in FIG. 1B, for example, a solder land (445a) that can be connected to the connection wiring board (1201) is prepared in advance on the left side of the first circuit board (441) in the drawing. , Fig. 4
As shown in (b), the flexible wiring board (1001) may be electrically connected to the first circuit board (441) via the connection wiring board (1202b). If the solder land (445a) cannot be prepared in advance due to mounting efficiency, the first circuit board
Only the (441) may be improved and designed, and in any case, the design change of the liquid crystal panel (100) itself is not necessary.

As described above, according to the liquid crystal display device (1) of this embodiment, the liquid crystal panel is provided at the position where the flexible wiring board (1001) is pulled out from the main body of various computer devices.
(100) can be easily and quickly dealt with without requiring a design change of itself, and is industrially useful.

In this embodiment, the connection wiring boards (1201), (12
Since 02a), (1202b) and the first circuit board (441) are connected by soldering, the thickness dimension can be made sufficiently thin. The connection between the connection wiring boards (1201), (1202a), (1202b) and the first circuit board (441) may be made via an anisotropic conductive material in addition to solder, and similarly. It can be made thin.

In this embodiment, the connection wiring board (120
1), (1202a), (1202b) are configured to be electrically connected to the first circuit board (441) arranged on the back side of the liquid crystal panel (100), but are almost the same as the liquid crystal panel (100). It may be connected to the Y driver board (431) arranged on a plane,
In addition, the Y driver board (431) is arranged on the back side of the liquid crystal panel (100) like the first circuit board (441), and the connection wiring board (120) is provided.
It may be connected to 1), (1202a), (1202b). Furthermore, the present invention is not limited to the connection connector (1101) described above, and connectors of various structures can be used.

[0033]

According to the flat display device of the present invention, one end is electrically connected to the circuit board and is electrically connected to the other end of the wiring board extending to a desired position, for example, the wiring board from the main body. Since it is configured to include a connection connector including a second fitting portion that can be electrically connected to, by changing the wiring board according to the position of the wiring board from the main body, or by changing the specifications of the circuit board. Thus, various required specifications can be easily met without impairing the thickness of the device.

[Brief description of the drawings]

FIG. 1 is a schematic front and back view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a schematic rear view taken along the line AA and a schematic rear view taken along the line BB of the liquid crystal display device of FIG.

FIG. 3 is a schematic perspective view of a connection connector portion in FIG.

FIG. 4 is a schematic rear view of a modification of the liquid crystal display device in FIG.

FIG. 5 is a schematic front and back view of one liquid crystal display device.

[Explanation of symbols]

 (1) Liquid crystal display device (100) Liquid crystal panel (431) Y driver substrate (441) First circuit substrate (500) First frame (600) Second frame (801) Light guide plate (1101) )… Connector (1201), (1202a), (1202b)… Connecting wiring board

Claims (5)

[Claims] 1. A display panel, a circuit board for controlling the display panel, a wiring board having one end electrically connected to the circuit board and the other end extending to a desired position, and the wiring board The wiring board and the other wiring board are electrically connected to each other, including a first fitting section electrically connected to the other end and a second fitting section electrically connected to the other wiring board. A flat panel display device comprising a connection connector. 2. The flat panel display device according to claim 1, wherein the wiring board and the one end of the wiring board are electrically connected to each other via solder or an anisotropic conductive material. 3. The array panel, wherein the display panel includes a plurality of pixel electrodes arranged in a matrix, signal lines and scan lines connected to the pixel electrodes via switch elements, and the array substrate facing the array substrate. 2. The flat panel display device according to claim 1, further comprising a counter substrate including a counter electrode, and a liquid crystal layer disposed between the array substrate and the counter substrate. 4. The flat panel display device according to claim 3, wherein the circuit board is electrically connected to the signal line of the array substrate. 5. The flat panel display device according to claim 3, wherein the circuit board is electrically connected to the scanning lines of the array substrate.