JPH10307301A - Liquid crystal display module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the yield of a product and to form a module to be small in size and light in weight by providing a source driving integrated circuit chip of the 1st group for impressing a source driving signal on the source of a thin film transistor and a gate driving integrated circuit chip of the 2nd group for impressing a gate driving signal on the selected gate of the thin film transistor. SOLUTION: The gate driving integrated circuit chip 72 inputs the inputted gate driving signal to the selected gate of the thin film transistor on a lower panel 30 through the 5th wiring 36. Meanwhile, the source driving integrated circuit chip 52 inputs the inputted source driving signal to the selected gate of the thin film transistor through the 3rd wiring 32 on the panel 30. By such constitution, a printed circuit board on a gate side is eliminated, the number of parts is reduced and production cost is reduced. Then, production is facilitated, defective proportion is reduced, the yield of the product is improved, and the module is formed to be small in size and light in weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display module.
More particularly, the present invention relates to a technique of assembling a printed circuit board having a gate driving integrated circuit and a liquid crystal display panel.

[0002]

2. Description of the Related Art Generally, in order to manufacture a liquid crystal display module, a gate driving integrated circuit and a source driving integrated circuit are arranged along a liquid crystal display panel. The gate driving integrated circuit sequentially supplies a driving voltage to a gate bus line of a liquid crystal display panel to form a thin film transistor (Thin).
The source driver integrated circuit supplies a signal voltage to a data bus line (or a source bus line) of the liquid crystal display panel and turns on the film transistor. It serves to transmit a data voltage to the liquid crystal cell through the TFT. Such a gate and source driving integrated circuit generally has a structure in which each chip of the gate and source driving integrated circuit is mounted on a flexible insulating film having wiring printed thereon. A package with such a structure
It is generally known as a tape carrier package (hereinafter referred to as TCP).

According to an example of the electrical connection method of the TCP currently used, one side lead of the TCP includes a matrix driving pin in a column direction and a row direction of a liquid crystal panel;
It is electrically bonded by ACF (Anisotropic Conductive Film). The other lead of the TCP is bonded by soldering to wiring printed on the first and second printed circuit boards provided along the row and column directions of the liquid crystal panel, respectively. A first printed circuit board for a gate provided along a column direction of the liquid crystal panel receives a composite synchronization signal, and separates a gate driving signal and a source driving signal into a gate driving integrated circuit and a source, respectively. A control unit for applying to the driving integrated circuit is provided.

FIG. 3 is a plan view of a conventional liquid crystal display module, and FIG. 4 is an enlarged view of a portion A shown in FIG. In the figure, this liquid crystal module is a lower panel 1a.
And a liquid crystal panel 1 comprising an upper panel 1b, and a composite synchronization signal is externally input to a control unit 9 mounted on the first printed circuit board 2 for the gate. The control unit 9 separates the input composite synchronizing signal into a gate drive signal and a source drive signal, and applies them to the gate drive integrated circuit 4 and the source drive integrated circuit 5, respectively. The gate driving signal for the gate driving integrated circuit 4 is directly applied to the gate driving integrated circuit 4 of the TCP 6 through the wiring printed on the first printed circuit board 2. On the other hand, the source driving signal for the source driving integrated circuit 5 is a flexible printed circuit (hereinafter, referred to as “Flexible Printed Circuit”) since the second printed circuit board 3 for the source is separated from the first printed circuit board 2. F
It is applied to the source driving integrated circuit 5 of the TCP 7 through the connection member 8 (referred to as PC) and the second printed circuit board 3 for the source.

As described above, in the conventional liquid crystal display module, in order to apply the source drive signal to the source drive integrated circuit 5, the gate-side first printed circuit board 2 having the control unit 9 to which the composite synchronizing signal is input must be used. I need. Therefore, in the conventional liquid crystal display module, the material cost increases due to the necessity of the first printed circuit board 2 on the gate side, and this is an obstructive factor for reducing the size and weight of the module. Further, since the first printed circuit board 2 and the second printed circuit board 3 are separated from each other, it is necessary to connect the two and bend the FPC 8 provided for transmitting the source drive signal.
This is a difficulty in manufacturing PCs.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has only one printed circuit board for transmitting any one of a source drive signal and a gate drive signal. The object of the present invention is to provide a liquid crystal display module having a small size and light weight by reducing the manufacturing cost, improving the product yield by eliminating the difficulty in manufacturing, and improving the product yield. And

[0007]

According to the present invention, in order to achieve the above object, there is provided a lower panel, an upper panel facing the lower panel, and a liquid crystal interposed therebetween. A liquid crystal display panel having an area larger than that of the upper panel and including, in the lower panel, pixels arranged in a matrix and a plurality of thin film transistors having a source, a drain, and a gate for switching each pixel; A printed circuit board separated from the display panel and arranged in parallel, a control unit disposed on the printed circuit board, receiving a composite synchronization signal from an external circuit, and outputting a source drive signal and a gate drive signal; The liquid crystal display panel is arranged along one side of the liquid crystal display panel between the circuit board and the lower panel. A first group of source driving integrated circuit chips electrically connected to the troll unit for applying the source driving signal to the source of the thin film transistor; and a lower panel portion not overlapping the upper panel, A second group of gate driving integrated circuit chips arranged along the other side and electrically connected to the control unit to apply a gate driving signal to a selected gate of the thin film transistor; Is what you do.

A signal transmission member disposed between the control unit and the second group of gate drive integrated circuit chips, wherein the signal transmission member is a flexible printed circuit film; Source drive integrated circuit chips are each formed on one flexible insulating film, and the second group of gate drive integrated circuit chips are each formed on one flexible insulating film, At least one source driving integrated circuit chip is formed on one flexible insulating film, at least one gate driving integrated circuit chip is formed on one flexible insulating film, and the thin film transistor is staggered; Alternatively, the thin film transistor is of an inverted stagger type.

A lower panel, an upper panel facing the lower panel, and a liquid crystal interposed therebetween;
The lower panel has a larger area than the upper panel, and includes a matrix-arranged pixels and a source for switching each of the pixels.
A liquid crystal display panel on which a large number of thin film transistors including a drain and a gate are arranged; a printed circuit board separated from the liquid crystal display panel and arranged in parallel; a composite synchronization signal arranged on the printed circuit board and supplied from an external circuit; And a control unit for receiving and outputting a source drive signal and a gate drive signal, between the printed circuit board and the lower panel,
The liquid crystal display panel is arranged along a non-overlapping portion of the lower panel that does not overlap with the upper panel in one side direction of the liquid crystal display panel and is electrically connected to the control unit to apply the source driving signal to the source of the thin film transistor. A first group of source driving integrated circuit chips and a liquid crystal display panel arranged between the printed circuit board and the lower panel along the other side of the liquid crystal display panel and electrically connected to the control unit. And a second group of gate drive integrated circuit chips for applying the gate drive signal to selected gates of the thin film transistor.

A signal transmission member disposed between the control unit and the second group of gate drive integrated circuit chips, wherein the signal transmission member is a flexible printed circuit film; The group of source drive integrated circuit chips are each formed on one flexible insulating film, and the second group of gate drive integrated circuit chips are each formed on one flexible insulating film. At least one source driving integrated circuit chip is formed on one flexible insulating film, and the thin film transistor is of a stagger type, or the thin film transistor is of an inverted stagger type.

A control unit for outputting a source drive signal and a gate drive signal separated from the input composite synchronization signal, and a plurality of first units for transmitting the source drive signal output from the control unit. A printed circuit board having a plurality of second lines for transmitting a gate driving signal output from the control unit, an upper panel and a lower panel, and a liquid crystal interposed between the upper panel and the lower panel. A liquid crystal display panel having pixels arranged in a matrix and a plurality of thin film transistors including a source, a drain, and a gate for switching the pixels, and a source drive from the control unit to the source. A third wiring for transmitting a signal,
A fourth wiring for transmitting a gate driving signal input from the control unit of the printed circuit board, and a fifth wiring for transmitting a selected gate driving signal;
One end is connected to the third wiring of the lower panel,
The other end is connected to the first wiring of the printed circuit board, and the source driving signal input from the control unit through the first wiring is applied to the source of the selected pixel through the third wiring. A source driving circuit unit, connecting means for electrically connecting the fourth wiring of the lower panel and the second wiring of the printed circuit board, and input through the connecting means and the fourth wiring of the lower panel. And a gate drive circuit for applying a gate drive signal selected from the gate drive signals to a selected gate of the lower panel through a fifth wiring of the lower panel.

Further, the source drive circuit section has at least one tape carrier package, the gate drive circuit section has at least one tape carrier package, and the signal transmission member is a flexible printed circuit film. It is.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial plan view of the liquid crystal display module, and FIG. 2 is an enlarged view of a portion B shown in FIG.

First, the structure of the liquid crystal display module relating to the source drive signal will be described. Referring to FIGS. 1 and 2, a liquid crystal display panel 100 including a lower panel 30 and an upper panel 40 is provided. The lower panel 30 is arranged so as to face the upper panel 40.
Liquid crystal is interposed between the liquid crystal panel and the lower panel 30. The printed circuit board (P) is arranged along the row direction of the liquid crystal display panel 100.
CB) 20 are provided. On the printed circuit board 20, a control unit 22 for receiving a composite synchronization signal from an external circuit and generating a source drive signal and a gate drive signal is provided. As shown in FIGS. 1 and 2, the printed circuit board 20 is separated from and separated from the liquid crystal display panel 100.

The printed circuit board 20 and the liquid crystal display panel 1
Some TCPs 50 are arranged along the row direction of the liquid crystal display panel 100 between 00 and 00. This TCP50
Are referred to as a first group of TCPs or source driving circuits, and the first group of TCPs 50 are for generating a source driving signal on a selected data line among the data lines connected to the source of the thin film transistor. It is. As shown in FIGS. 1 and 2, each of the first group of TCPs 50 includes a source driving integrated circuit chip 52 and a flexible insulating film 51 having a plurality of wirings 53, and the source driving integrated circuit chip 52 is It is mounted on an insulating film 51 and is electrically connected to the wiring 53.

As shown in FIGS. 1 and 2, each of the first group of TCPs 50 has a structure in which one flexible insulating film corresponds to one integrated circuit chip, but a number of chips are combined. It may be configured to be mounted on two flexible insulating films.

The wiring 53 on one side of the source driving integrated circuit chip 52 is connected to the control unit 22 through a plurality of first wirings 24 for transmitting a source driving signal from the control unit 22 to the source driving integrated circuit chip 52. Is electrically connected to The wiring 53 on the other side of the source driving integrated circuit chip 52 is electrically connected to a plurality of third wirings 32 arranged along the row direction of the lower panel 30. The third wiring 32 connects the source driving signal (data driving signal or video signal) from the source driving integrated circuit chip 52 to the source of the thin film transistor and transmits the source driving signal to the data line. Each of the chips 52 is for generating a source drive signal for driving a data line.

The lower panel 30 has a large number of pixels (not shown) arranged in a matrix and a large number of thin film transistors (TFTs: not shown) for switching the pixels. The thin film transistor has a pixel electrode and one
They are arranged on the lower panel 30 so as to correspond to one to one.
Inverted staggered type, staggered type
(Normally staggered type), Coplanar type
Various types of thin film transistors such as a TFT, a semi-self-aligned type, and a fully self-aligned type can be applied to the present invention.

Next, the structure of the liquid crystal display module for the gate drive signal will be described. As shown in FIGS. 1 and 2, in order to transmit a gate drive signal from the control unit 22 to the gate of the thin film transistor, a dummy portion of the lower panel 30 (a predetermined portion of the lower panel not opposed to the upper panel 40) Several TCPs 70 are provided along the row direction of the upper panel 40. Here, the TCP 70 is referred to as a second group TCP or a gate drive circuit unit. The TCP 70 of the second group is for generating a gate drive signal from the control unit 22 to the gate of the thin film transistor. TC of the second group
P70 includes a flexible insulating film 71 each having a gate driving integrated circuit chip 72 and a number of wirings 75. The gate driving integrated circuit chip 72 is mounted on the insulating film 71, and is electrically connected to the wiring 75. Are linked together.

Since the printed circuit board 20 is separated from the lower panel 30, a signal transmitting member 60 is provided for transmitting signals between the control unit 22 and the gate driving integrated circuit chip 72. The signal transmission member 60 has a structure in which wiring is formed in a flexible film, and is generally known as a flexible printed circuit film (hereinafter, referred to as an FPC film). The control unit 22 is connected to the FP through a plurality of second wires 26.
The C film 60 is connected to the gate driving integrated circuit chip 72 through the fourth wiring 34.
The gate drive signal is transmitted from the FPC film 60 to the gate drive integrated circuit chip 72. Here, each gate drive integrated circuit chip 72 has a large number of wirings 7.
5 is connected.

In the dummy portion at the edge of the lower panel 30 in the column direction, a selected signal among the input drive signals is
A number of fifth wires 36 are provided for transmitting to the selected gate line. Therefore, the signal transmission path for the gate drive signal is controlled by the control unit 22 on the printed circuit board 20, the second wiring 26, the FPC film 60,
The fourth wiring 34 on the lower panel 30 and the second group of TCs
This is the order of the gate drive integrated circuit chip 72 of P70.
The gate driving signal input from the fifth wiring 36 drives a gate corresponding to the selected thin film transistor on the lower panel 30.

On the other hand, in each of the TCPs 70 of the second group, one side portion of the flexible insulating film 71 with respect to the gate integrated circuit chip 72 is disposed outside the lower panel 30. The one side portion is a slit formed on an edge of the lower panel 30 along a column direction of the lower panel 30.
(slit) 74. During the module assembling process, the one side is folded along the slit and attached to the rear surface of the panel. As a result, the module is compact.
The fourth wiring 34 supplies a gate signal to each of the gate drive integrated circuit chips 72 of the second group of TCPs 70. At this time, an extension from the fourth wiring 34 does not overlap with the fifth wiring 36. The second group of TCPs 7 through the one side of the FPC film 71 outside the lower panel 30.
It is desirable to be connected to each chip of 0.

Hereinafter, the operation of the liquid crystal display module having the above configuration will be described. When the composite synchronizing signal is input to the control unit 22, the gate driving signal for the gate driving integrated circuit separated from the composite synchronizing signal is transmitted to the second wiring 26 of the printed circuit board 20, the FPC film 60, and the fourth panel of the lower panel 30. A second group of TCPs is sequentially passed through the wiring 34.
The signal is input to the gate drive integrated circuit chip 72 of FIG. The gate driving integrated circuit chip 72 inputs the input gate driving signal to the gate of the selected thin film transistor of the lower panel 30 through the fifth wiring 36. On the other hand, the source drive signal for the source drive integrated circuit output from the control unit 22 is the first drive signal of the printed circuit board 20.
A wiring 24 and a first group of Ts connected to the first wiring 24;
The signal is input to the source driving integrated circuit chip 52 through the wiring printed on the insulating film 51 of the CP 50. The source driving integrated circuit chip 52 inputs the input source driving signal to the source of the selected thin film transistor through the third wiring 32 of the lower panel 30.

As a result, the gate of the thin film transistor is selected, and a source driving signal is input to the source of the thin film transistor and transmitted to the drain, so that an image is displayed on the screen of the liquid crystal panel.

In the above-described embodiment, the source driving integrated circuit chip 52 is disposed between the printed circuit board 20 and the lower panel 30, and the gate driving integrated circuit chip 72 is provided.
Are arranged on a portion of the lower panel 30 that does not overlap with the upper panel 40 along the other direction of the liquid crystal display panel, but the positions of the source driving integrated circuit chip 52 and the gate driving integrated circuit chip 72 are interchanged. Can also.

The present invention is, of course, not limited to the above-described embodiment, and can take any modified or modified embodiment within the scope of the technical idea described in the claims. .

[0027]

As described above, according to the liquid crystal display module of the present invention, the printed circuit board on the gate side is eliminated, and the gate drive integrated circuit is mounted along the edge of the liquid crystal display panel to form the liquid crystal display panel. Bus line and FP
By connecting to the source side integrated circuit through C,
The number of parts can be reduced, thereby reducing the manufacturing cost. In addition, since the FPC has a configuration having a linear shape, the FPC can be easily manufactured, the defect rate can be reduced, the product yield can be improved, and a small and lightweight liquid crystal module can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a liquid crystal display module according to the present invention.

FIG. 2 is an enlarged view of a portion B shown in FIG.

FIG. 3 is a plan view of a conventional liquid crystal display module.

FIG. 4 is an enlarged view of a portion A shown in FIG.

[Explanation of symbols]

 Reference Signs List 20 printed circuit board (PCB) 22 control unit 24 first wiring 26 second wiring 30 lower panel 32 third wiring 34 fourth wiring 36 fifth wiring 40 upper panel 50 first group of TCPs 51 insulating film 52 source drive integrated circuit Chip 53 Wiring 60 FPC film 70 TCP 72 Gate drive integrated circuit chip 74 Slit

Claims (19)

[Claims] 1. A lower panel, an upper panel facing the lower panel, and a liquid crystal interposed therebetween. The lower panel has a larger area than the upper panel, and the lower panel has a matrix arrangement. Pixel and the source for switching each pixel,
A liquid crystal display panel on which a plurality of thin film transistors having a drain and a gate are arranged; a printed circuit board separated from the liquid crystal display panel and arranged in parallel; a composite synchronization signal arranged on the printed circuit board and received from an external circuit A control unit for receiving a source drive signal and a gate drive signal in response to the control unit, and being arranged along one side of the liquid crystal display panel between the printed circuit board and the lower panel and electrically connected to the control unit. A first group of source driving integrated circuit chips for applying the source driving signal to the source of the thin film transistor, the lower group being not overlapped with the upper panel; And a gate drive signal that is electrically connected to the control unit to transmit the gate drive signal to the control unit. A second group of gate drive integrated circuit chips for applying a voltage to a selected gate of the membrane transistor. 2. The liquid crystal display module according to claim 1, further comprising a signal transmission member disposed between the control unit and the second group of gate drive integrated circuit chips. 3. The liquid crystal display module according to claim 2, wherein the signal transmission member is a flexible printed circuit film. 4. The first group of source driving integrated circuit chips are each formed on one flexible insulating film, and the second group of gate driving integrated circuit chips are each formed on one flexible insulating film. 2. The liquid crystal display module according to claim 1, wherein the liquid crystal display module is formed on a conductive insulating film. 5. The liquid crystal display module according to claim 1, wherein at least one source driving integrated circuit chip is formed on one flexible insulating film. 6. The liquid crystal display module according to claim 1, wherein at least one gate driving integrated circuit chip is formed on one flexible insulating film. 7. The liquid crystal display module according to claim 1, wherein the thin film transistor is a staggered type. 8. The liquid crystal display module according to claim 1, wherein said thin film transistor is of an inverted stagger type. 9. A display device comprising: a lower panel; an upper panel facing the lower panel; and a liquid crystal interposed therebetween. The lower panel has a larger area than the upper panel, and the lower panel has a matrix arrangement. Pixel and the source for switching each pixel,
A liquid crystal display panel on which a number of thin film transistors including a drain and a gate are disposed; a printed circuit board separated from the liquid crystal display panel and arranged in parallel; a composite synchronization signal disposed on the printed circuit board and received from an external circuit A control unit for receiving a source drive signal and a gate drive signal in response to the signal; and a non-overlapping portion of the lower panel not overlapping the upper panel in one direction of the liquid crystal display panel between the printed circuit board and the lower panel. A first group of source driving integrated circuit chips arranged along the line and electrically connected to the control unit to apply the source driving signal to the source of the thin film transistor; Are arranged between the printed circuit board and the lower panel along the control unit. A second group of gate driving integrated circuit chips electrically connected to the gate to apply the gate driving signal to selected gates of the thin film transistor. 10. The control unit and the second control unit
The liquid crystal display module according to claim 9, further comprising a signal transmitting member disposed between the group of gate driving integrated circuit chips. 11. The liquid crystal display module according to claim 10, wherein the signal transmission member is a flexible printed circuit film. 12. The first group of source driving integrated circuit chips are each formed on one flexible insulating film, and the second group of gate driving integrated circuit chips are each formed of one flexible driving film. 2. The liquid crystal display module according to claim 1, wherein the liquid crystal display module is formed on a conductive insulating film. 13. The liquid crystal display module according to claim 9, wherein at least one source driving integrated circuit chip is formed on one flexible insulating film. 14. The liquid crystal display module according to claim 9, wherein the thin film transistor is of a stagger type. 15. The liquid crystal display module according to claim 9, wherein the thin film transistor is of an inverted stagger type. 16. A control unit for outputting a source drive signal and a gate drive signal separated from an input composite synchronizing signal, and a plurality of first units for transmitting the source drive signal output from the control unit. A printed circuit board having wires and a plurality of second wires for transmitting a gate driving signal output from the control unit; an upper panel and a lower panel; and a liquid crystal interposed between the upper panel and the lower panel. A liquid crystal display panel in which pixels arranged in a matrix and a plurality of thin film transistors including a source, a drain, and a gate for switching the pixels are arranged; and a source drive from the control unit to the source. A third wiring for transmitting a signal; and in front of the printed circuit board. A fourth wiring for transmitting the gate driving signal input from the control unit, a fifth wiring for transmitting the selected gate driving signal, and one end connected to the third wiring of the lower panel. And the other end is connected to the first wiring of the printed circuit board, and applies a source driving signal input from the control unit through the first wiring to the source of the selected pixel through the third wiring. Source driving circuit unit, a connection means for electrically connecting a fourth wiring of the lower panel and a second wiring of the printed circuit board, and an input through the connection means and the fourth wiring of the lower panel. Applying a gate drive signal selected from the selected gate drive signals to a selected gate of the lower panel through a fifth wiring of the lower panel. A liquid crystal display module comprising: a gate drive circuit unit. 17. The liquid crystal display module according to claim 16, wherein the source driving circuit unit has at least one tape carrier package. 18. The liquid crystal display module according to claim 16, wherein the gate driving circuit unit includes at least one tape carrier package. 19. The liquid crystal display module according to claim 16, wherein the signal transmission member is a flexible printed circuit film.