KR102056671B1 - Image display device of touch type and mathod for manufacturing the same - Google Patents

Abstract

The present invention relates to a touch type image display device capable of touch input, and improves the pad structure of the touch panel and the attachment structure of the flexible printed circuit board to prevent interference with the image display panel driving integrated circuit. The present invention relates to a touch image display device and a method of manufacturing the same, the image display panel including a plurality of pixel areas to display an image; A driving integrated circuit driving the image display panel; A touch panel attached to a front surface of the image display panel to output a touch detection signal according to a touch position; And a first flexible circuit board attached to one side of the touch panel in a branched manner so as not to overlap or overlap with the driving integrated circuit of the image display panel, and transmitting the driving signal and the touch detection signal of the touch panel. It features.

Description

Touch image display device and manufacturing method thereof IMAGE DISPLAY DEVICE OF TOUCH TYPE AND MATHOD FOR MANUFACTURING THE SAME

The present invention relates to a touch type image display device capable of touch input, and improves the pad structure of the touch panel and the attachment structure of the flexible printed circuit board to prevent interference with the image display panel driving integrated circuit. The present invention relates to a touch image display device and a method of manufacturing the same.

In recent years, as the information age has entered, the display field for visually expressing electrical information signals has been rapidly developed. In response, various flat panel displays having excellent performance of thinning, light weight, and low power consumption have been developed. Display Device) is being developed.

The flat panel display includes a liquid crystal display device, a plasma display panel device, a field emission display device (FED), and an organic light emitting diode display device. ), And the like.

Among them, the organic light emitting diode display uses a self-luminous display panel that emits light of its own so that the contrast ratio is high, the ultra-thin display can be realized, and the response time is several microseconds. Easy to implement In addition, the liquid crystal display device is widely used because of its low power drive and excellent image quality. The liquid crystal panel corresponds to a non-emission flat panel and receives an image from a backlight unit to display an image.

Recently, a touch panel capable of recognizing a touch portion through a hand of a person, a stylus pen, or the like and transmitting separate information in response to the flat panel display device is increasing. The touch panel is divided into a resistive method, a capacitive method, and an infrared detection prevention method according to a touch sensing method, and the capacitive method has recently attracted attention in view of the convenience and detection power of a manufacturing method.

Currently, the touch panel is applied in the form of attaching to an external surface (particularly, the front surface) of the image display panel. A flexible printed circuit board for transmitting driving signals and a touch detection signal is attached to the touch panel, so that a flexible circuit board connected to one side of the touch panel, one side of the image display panel, and the image display panel can be connected to the touch panel. It is arranged in a wrapping form.

However, conventionally, as the flexible circuit board of the touch panel overlaps with the driving circuit (for example, the driving integrated circuit) and the other flexible circuit board of the image display panel, signal interference occurs between each other, and signal transmission error and malfunction Poor phenomena such as this were likely to occur. As a result, the reliability thereof was deteriorated, and various problems such as an assembly thickness and a step between the flexible circuit board, the image display panel, and the driving circuit are also large, resulting in deterioration of the assembly process efficiency.

The present invention has been made to solve the above problems, by improving the pad structure of the touch panel and the attachment structure of the flexible printed circuit board to prevent interference with the image display panel driving integrated circuit, SUMMARY OF THE INVENTION An object of the present invention is to provide a touch type image display device and a method of manufacturing the same, which can improve reliability.

According to an aspect of the present invention, there is provided a touch image display device including an image display panel including a plurality of pixel areas to display an image; A driving integrated circuit driving the image display panel; A touch panel attached to a front surface of the image display panel to output a touch detection signal according to a touch position; And a first flexible circuit board attached to one side of the touch panel in a branched manner so as not to overlap or overlap with the driving integrated circuit of the image display panel, and transmitting the driving signal and the touch detection signal of the touch panel. It features.

The first flexible printed circuit board may be branched in a “Y” shape so as not to overlap or overlap with a driving integrated circuit of the image display panel, and may be separated from each other by being branched in a “Y” shape to form first and second ends. The pads may be attached to the first and second pad areas separately disposed on one side of the touch panel.

The first and second pad regions are separately disposed adjacent to both corners of one side of the touch panel, respectively, the first and second pad regions each having first electrodes electrically connected to first channels; And second electrodes electrically connected to the second channels, respectively.

A first channel region in which the first electrodes are electrically connected to first channel lines and a second electrode in which the second electrodes are electrically connected to second channel lines are disposed in the first and second pad regions; A channel region, each of the first electrodes having upper and lower contact holes formed therein, and the second electrodes having a smaller width than that of the first electrodes without the contact hole being formed. It features.

The second electrodes have a zigzag shape in which the second electrodes adjacent to each other in the second channel region are formed to have a minimum size and a forming width required by Film on Glass (FOG) or Tape Automated Bonding (TAB). Characterized in that arranged.

In addition, a method of manufacturing a touch image display device according to an embodiment of the present invention for achieving the above object comprises the steps of: configuring an image display panel for displaying an image and a driving integrated circuit for driving the image display panel; Configuring a touch panel to output a touch detection signal according to a touch position on a front surface of the image display panel; And forming a first flexible circuit board attached to one side of the touch panel in a branched manner so as not to overlap or overlap with the driving integrated circuit of the image display panel to transmit the driving signal and the touch detection signal of the touch panel. Characterized by including.

The forming of the first flexible printed circuit board may include forming the first flexible printed circuit board such that the first flexible printed circuit board is branched into a “Y” shape so as not to overlap or overlap with a driving integrated circuit of the image display panel, and branched into a “Y” shape. And attaching the first and second pads at one end of each side formed by being separated from each other to the first and second pad areas separately disposed at one side of the touch panel.

The first and second pad areas may be separated from each other at both corners of one side of the touch panel, and the first and second pad areas may include first electrodes electrically connected to first channels; And second electrodes electrically connected to the second channels, respectively.

A first channel region in which the first electrodes are electrically connected to first channel lines and a second electrode in which the second electrodes are electrically connected to second channel lines are disposed in the first and second pad regions; A channel region, each of the first electrodes having upper and lower contact holes formed therein, and the second electrodes having a smaller width than that of the first electrodes without the contact hole being formed. It features.

The second electrodes zigzag adjacent to each other in the second channel region while allowing the size and formation width of the second electrode to be formed to a minimum required in a film on glass (FOG) or tape automated bonding (TAB) process. Characterized in that arranged in the form.

A touch image display device and a method of manufacturing the same according to an embodiment of the present invention having the above characteristics are improved by improving the pad structure of the touch input panel and the attachment structure with the flexible printed circuit board. And interference of the image display panel driving circuit can be prevented.

In particular, by preventing signal interference between the flexible circuit board that transmits the touch detection driving signal and the touch detection signal and the image display panel driving circuit, it is possible to prevent defects such as signal transmission error and malfunction, thereby improving driving reliability of the touch image display device. You can.

In addition, since the flexible circuit board of the touch input panel and the image display panel driving circuit are configured so as not to overlap, the assembly thickness of the flexible circuit board and the image display panel driving circuit can be reduced and a problem that may occur during the assembly process due to a step is required. I can solve it.

1 is an exploded perspective view schematically illustrating a touch type image display device according to an exemplary embodiment of the present invention.
FIG. 2 is a front perspective view specifically showing first and second pad regions to which the first flexible circuit board of FIG. 1 is attached. FIG.
3 is a layout view illustrating first and second pad regions of the touch panel illustrated in FIG. 2.
4 is a layout view of the first flexible circuit board shown in FIGS. 1 and 2.
FIG. 5 illustrates the first pad region shown in FIG. 2 in more detail.

Hereinafter, a touch type image display device and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition to the liquid crystal display and the organic light emitting diode display, a video display device according to the present invention may be a plasma display panel, a field emission display, or the like. The technical features of the present invention may be applied to all of the above flat panel display devices, but for the convenience of description, an example applied to the organic light emitting diode display device will be described.

1 is an exploded perspective view schematically illustrating a touch image display device according to an exemplary embodiment of the present invention.

The touch type image display device illustrated in FIG. 1 includes an image display panel 20 including a plurality of pixel areas to display an image; A driving integrated circuit 33 driving the image display panel 20; A touch panel 40 attached to the front of the image display panel 20 to output a touch detection signal according to a touch position; First to attach to one side of the touch panel 40 in a branched manner so as not to overlap or overlap the driving integrated circuit 33 of the image display panel 20 to transmit the drive signal and the touch detection signal of the touch panel 40. Flexible Printed Circuit Board 42; And a second flexible printed circuit board 30 which transmits data signals and control signals to the image display panel 20 and the driving integrated circuit 33 thereof.

The touch panel 40 is disposed in front of the image display panel 20, and the image display module to which the first and second flexible circuit boards 42 and 30 are attached is mounted and fixed to the support main 2. Then, the image display module assembled to the front and the inside including the support main 2 is fixed to the inside of the bottom case 5.

In the image display panel 20, a plurality of sub pixels are arranged in a matrix form in each pixel area to display an image. Each sub pixel independently drives an organic light emitting diode and an organic light emitting diode. A diode driving circuit is provided. Specifically, one sub pixel includes a diode driving circuit connected to each gate line, a data line, and a first power supply line, and a light emitting diode connected between the diode driving circuit and the second power supply line. Here, the diode driving circuits respectively supply the analog image signal from the connected data line to the organic light emitting diode while charging the supplied analog image signal to maintain the light emitting state.

The driving integrated circuit 33 generates gate control signals for driving the gate lines of the image display panel 20 by itself, and sequentially uses the gate on signals (eg, gate voltages of low or high logic). Create and print The pulse width of the gate on signal is self-controlled to sequentially supply the gate on signals to the gate lines. Accordingly, the driving integrated circuit 33 allows the diode driving circuits connected to the gate lines to be driven in units of gate lines.

In addition, the driving integrated circuit 33 converts digital image data input or stored externally into an analog voltage, that is, an analog data voltage. In this case, the driving integrated circuit 33 generates a gamma voltage set by subdividing a plurality of levels of reference gamma voltages to correspond to grayscale values (for example, 0 to 255 grayscale values) of the digital image data, and then generate a gamma voltage set. The digital image data is converted into an analog data signal using a voltage set. The converted data signals are sequentially supplied to each data line.

The driving integrated circuit 33 is disposed on one end of the image display panel 20, that is, on one end of the lower substrate 20a in a chip on glass manner, and has a second flexibility on the mounting surface of the driving integrated circuit 33. The circuit board 30 is attached. The second flexible circuit board 30 is a circuit board on which a complicated circuit is formed on a flexible insulating film, and is a substrate using a heat resistant plastic film such as PET (polyester) or PI (polyimide), which is a flexible material. The second flexible printed circuit board 30 is disposed and assembled in a form that surrounds some side surfaces of the image display panel 20 and its lower structures when the image display apparatus is assembled.

The touch panel 40 is attached to the front of the image display panel 20 to transmit a touch detection signal according to the touch position to the first flexible printed circuit board 42. Here, the touch panel 40 detects the touch position by any one of a touch sensing method such as a resistive method, a capacitive method, and infrared sensing prevention. Hereinafter, in consideration of convenience and detection power of the manufacturing method, the capacitive method is used. An example in which the touch panel 40 is applied will be described.

The capacitive touch panel 40 includes a plurality of touch sensors including a plurality of first channels and second channels (not shown) that cross each other. Each of the plurality of first and second channels has a bar shape, and the plurality of first and second channels cross each other to form a plurality of touch sensors. Here, a driving signal is sequentially applied to the first channels, and a touch detection signal whose level changes with touch is detected from the second channels. The plurality of first and second channels may be formed in a diamond pattern or other polygonal shape having symmetry in addition to the bar shape.

The first flexible printed circuit board 42 is branched so as not to overlap with the driving integrated circuit 33 and attached to the first and second pad regions of the touch panel 40, respectively. In more detail, the first flexible printed circuit board 42 is branched in a “Y” shape so as not to overlap or overlap with the driving integrated circuit 33 of the image display panel 20, and branched in a “Y” shape. The first and second pads at one end of each side formed by being separated from each other are attached to the first and second pad areas separately disposed at one side of the touch panel 40.

The first and second pads are formed at one end of each branch branched in a “Y” shape, and the first and second pads of the touch panel 40 may be formed using a film on glass (FOG) method or a tape automated bonding (TAB) method. Respectively attached to the pad area.

When the touch panel 40 is attached to the front surface of the image display panel 20, the first flexible circuit board 42 and the second flexible circuit board 30 may be partially supported by the side of the image display panel 20 and the support main 2. It is bent in a form surrounding a part of the side) and arranged along the back of the support main (2). Then, the image display module in which the assembly of the support main 2 is completed is accommodated in the bottom case 5 to complete the assembly of the touch image display device.

FIG. 2 is a front perspective view specifically showing first and second pad regions to which the first flexible circuit board of FIG. 1 is attached. 3 is a layout diagram illustrating first and second pad regions of the touch panel illustrated in FIG. 2.

2 and 3, first and second pad regions electrically contacting and attaching to the pads of the first flexible printed circuit board 42 may be formed in regions adjacent to both corners of one side of the touch panel 40. 40a and 40b are disposed respectively. In other words, the first and second pad areas are separately disposed adjacent to both corners of one side of the touch panel 40, respectively, and the first and second pad areas are electrically connected to the first channels. Second electrodes 55 electrically connected to the electrodes 50 and the second channels are respectively disposed. The driving signals are supplied to the first electrodes 50 through the first flexible circuit board 42 to transmit the driving signals to the first channels constituting the touch sensor. The touch detection signal is supplied to the second electrodes 55 from the second channels constituting the touch sensor, and outputs the touch detection signal to the outside through the first flexible printed circuit board 42.

4 is a layout view of the first flexible circuit board shown in FIGS. 1 and 2.

2 and 4, the first flexible printed circuit board 42 is branched in a “Y” shape so as not to overlap or overlap with the driving integrated circuit 33 disposed on one side of the image display panel 20. Separately formed first and second pads of one end are attached to the first and second pad regions 40a and 40b separately disposed on the touch panel 40, respectively. Therefore, the driving integrated circuit 33 of the image display panel 20 is disposed between the first flexible printed circuit board 42 and the branched in the "Y" form without overlapping or overlapping the first flexible printed circuit board 42. .

The first flexible circuit board 42 may be made of a heat resistant plastic film such as a flexible material such as PET (polyester) or PI (polyimide), and may be, for example, a printed circuit board (PCB) or a film on PCB (FPCB). have.

FIG. 5 is a diagram illustrating the first pad region illustrated in FIG. 2 in more detail.

Referring to FIG. 5, in the first and second pad regions 40a and 40b, the first channel region 40c and the second electrode 50 having the first electrodes 50 electrically connected to the first channel lines TxL are disposed. The second channel region 40d on which the second electrodes 55 are electrically connected to the channel lines RxL is disposed.

Upper and lower contact holes 50a are formed in each of the first electrodes 50 of the first channel region 40c, and the second electrodes 55 of the second channel region 40d are contact holes. It is formed smaller in a narrower width than the first electrodes 50 in the non-formed state.

The first electrodes 50 of the first channel region 40c are bonded and conductive through a metal material such as silver (Ag) during the FOG or TAB process, which is bonded to any pad of the first flexible circuit board 40. Accordingly, the first electrodes 50 are formed with contact holes 50a which are electrically connected up and down by a metal material, so that the size of the contact hole 50a to be processed and the spread and alignment tolerances of the metal material are formed. As it occurs, there is a limit to reducing the size.

On the other hand, since the second electrodes 55 of the second channel region 40d output the touch detection signal transmitted through the second channel lines RxL to the outside, there is no need to configure a contact hole. Therefore, the second electrodes 55 of the second channel region 40d may be formed smaller than the sizes of the first electrodes 50 to the minimum size required by the FOG or TAB process. By minimizing the size and forming width of the second electrodes 55 to reduce the second channel region 40d, the first and second pad regions 40a and 40b are adjacent to both corners of the touch panel 40, respectively. It can be separated and formed easily.

As shown in FIG. 5, the second electrodes 55 of the second channel region 40d may be formed within the second channel region 40d while allowing their size and formation width to be formed to the minimum required by the FOG or TAB process. The second electrodes 55 adjacent to each other may be arranged in a zigzag form. As such, when the second electrodes 55 adjacent to each other are arranged in a zigzag form, the width or the width of the second channel region 40d may be further reduced as compared with the configuration in which the second electrodes 55 are arranged side by side. Therefore, the driving integrated circuit 33 can be more easily arranged in the area between the first flexible circuit boards 42 branched in the "Y" shape.

As described above, the touch type image display device and the manufacturing method thereof according to the present invention improve the pad structure 40a and 40b forming structure of the touch panel 40 and the attachment structure with the first flexible circuit board 42. The interference between the first flexible printed circuit board 42 and the driving integrated circuit 33 of the image display panel 20 can be prevented.

In particular, by preventing signal interference between the first flexible printed circuit board 42 that transmits the touch detection driving signal, the touch detection signal, and the like, and the driving integrated circuit 33 of the image display panel 20, signal transmission errors and malfunctions, etc. It is possible to improve the driving reliability of the touch type video display device by preventing a bad phenomenon.

In addition, since the first flexible printed circuit board 42 and the driver integrated circuit 33 of the touch panel 40 are configured not to overlap, the thickness of the assembly of the first flexible printed circuit board 42 and the driver integrated circuit 33 may be reduced. It is possible to solve the problem that may occur in the assembly process by the step.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

2: support main 5: bottom case
20: image display panel 30: second flexible circuit board
33: driving integrated circuit 40: touch panel
42: first flexible printed circuit board 40a: first pad area
40b: second pad area 40c: first channel area
40d: second channel region 50: first channel
55: second channel

Claims (13)

An image display panel including a plurality of pixel regions to display an image;
A driving integrated circuit driving the image display panel;
A touch panel attached to a front surface of the image display panel to output a touch detection signal according to a touch position, and having first and second pad regions disposed separately; And
And a first flexible circuit board attached to one side of the touch panel in a branched manner so as not to overlap with the driving integrated circuit of the image display panel to transmit the driving signal and the touch detection signal of the touch panel.
The first and second electrodes disposed on the first and second pad regions respectively have different sizes. The method of claim 1,
The first flexible circuit board is
Branched to form a "Y" so as not to overlap or overlap the driving integrated circuit of the image display panel,
And first and second pads at end portions separated from each other by being branched in a “Y” shape to be attached to the first and second pad regions respectively disposed on one side of the touch panel. The method of claim 2,
The first and second pad regions are
It is disposed separately adjacent to both corners of one side of the touch panel,
And each of the first electrodes electrically connected to the first channels and the second electrodes electrically connected to the second channels are disposed in the separated first and second pad areas, respectively. The method of claim 3, wherein
The first and second pad regions may be
A first channel region in which the first electrodes are electrically connected to first channel lines and a second channel region in which the second electrodes are electrically connected to second channel lines are provided;
Each of the first electrodes is formed with contact holes vertically connected to each other, and the second electrodes are smaller in width than the first electrodes without contact holes being formed. The method of claim 4, wherein
The second electrodes
A touch type in which the second electrodes adjacent to each other in the second channel region are arranged in a zigzag form while the size and the forming width thereof are formed to the minimum required in a film on glass (FOG) or tape automated bonding (TAB) process. Video display. Configuring an image display panel displaying an image and a driving integrated circuit driving the image display panel;
Configuring a touch panel having a first pad area and a second pad area disposed on the front surface of the image display panel and outputting a touch detection signal according to a touch position; And
Configuring a first flexible circuit board attached to one side of the touch panel in a branched manner so as not to overlap or overlap with the driving integrated circuit of the image display panel to transmit the driving signal and the touch detection signal of the touch panel; Include,
The first and second electrodes disposed on the first and second pad regions, respectively, have different sizes. The method of claim 6,
The step of configuring the first flexible printed circuit board
Forming the first flexible circuit board so as to be branched in a “Y” shape so as not to overlap or overlap with a driving integrated circuit of the image display panel; and
And attaching the first and second pads at one end of each side, which are separated from each other by being branched in a “Y” form, to the first and second pad areas separately disposed at one side of the touch panel. Method of manufacturing a video display device. The method of claim 7, wherein
The first and second pad regions are
It is formed to be separated adjacent to each of both corners of one side of the touch panel,
Manufacturing the touch type image display device in which the first electrodes electrically connected to the first channels and the second electrodes electrically connected to the second channels are disposed in the separated first and second pad areas, respectively. Way. The method of claim 8,
The first and second pad regions may be
A first channel region in which the first electrodes are electrically connected to first channel lines and a second channel region in which the second electrodes are electrically connected to second channel lines are provided;
Each of the first electrodes is provided with contact holes vertically connected to each other, and the second electrodes are formed to have a narrower width than the first electrodes with no contact holes. Way. The method of claim 9,
The second electrodes
The second electrodes adjacent to each other in the second channel region are arranged in a zigzag form while the size and the forming width thereof are formed to the minimum required in a film on glass (FOG) or tape automated bonding (TAB) process. A method of manufacturing a touch type video display device. The method of claim 1,
And the second electrode has a line width smaller than that of the first electrode. The method of claim 11,
And the second electrode of the first and second pad areas is disposed closer to the driving integrated circuit than the first electrode of the first and second pad areas. The method of claim 11,
The first and second pad regions may include a first channel region in which the first electrodes are disposed, and a second channel region in which the second electrodes are disposed.
The second channel area of each of the first and second pad areas is disposed between the first channel areas of each of the first and second pad areas,
And a driving integrated circuit disposed in an area between the second channel area of each of the first and second pad areas.

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