KR101658149B1 - Display Device Including Touch Panel - Google Patents

Abstract

The present invention relates to a touch panel integrated display device for reducing the number of boards used and reducing the visibility of wiring by changing the structure in the vicinity of a case top by forming a touch panel on the back side of one substrate of a liquid crystal panel, A panel-integrated display device includes: a display panel including an active area in the center and an outer area surrounding the active area; and a plurality of pixels arranged in a direction intersecting with the active area on one surface of the display panel First and second pad electrodes formed on the one surface of the display panel so as to correspond to edges of the outer area and first and second pad electrodes formed on the one surface of the display panel, And first and second routing lines for connecting the first and second electrodes to each other; A polarizer formed on the one surface of the display panel so as to cover the first and second electrodes, the first and second pad electrodes, and the first and second routing wirings; And a case top for casing the polarizing plate and the display panel at the edge of the polarizing plate.

Description

[0001] The present invention relates to a touch panel integrated type display device,

The present invention relates to a touch panel, and more particularly, to a touch panel integrated type display device in which a touch panel is formed on the rear side of one substrate of a liquid crystal panel to reduce the number of boards used and change the structure in the vicinity of the case top .

In recent years, as the information age has come to a full-fledged information age, a display field for visually representing electrical information signals has been rapidly developed. In response to this, various flat panel display devices having excellent performance of thinning, lightweighting, Flat Display Device) has been developed to replace CRT (Cathode Ray Tube).

Specific examples of such flat panel display devices include a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display (FED) (Electro Luminescence Display Device: ELD). In general, a flat panel display panel that realizes an image is an essential component. The flat panel display panel has a pair of light emitting or polarizing material layers interposed therebetween And a transparent insulating substrate facing each other.

In a liquid crystal display device, an image is displayed by adjusting the light transmittance of a liquid crystal using an electric field. To this end, the image display apparatus includes a display panel having a liquid crystal cell, a backlight unit for irradiating the display panel with light, and a drive circuit for driving the liquid crystal cell.

The display panel is formed such that a plurality of gate lines and a plurality of data lines intersect to define a plurality of unit pixel regions. At this time, each pixel region includes a thin film transistor array substrate and a color filter array substrate facing each other, a spacer positioned to maintain a constant cell gap between the two substrates, and a liquid crystal filled in the cell gap.

The thin film transistor array substrate includes gate lines and data lines, a thin film transistor formed as a switching element for each intersection of the gate lines and the data lines, a pixel electrode formed in a unit of a liquid crystal cell and connected to the thin film transistor, And an applied alignment film. The gate lines and the data lines are supplied with signals from the driving circuits through respective pad portions.

The thin film transistor supplies a pixel voltage signal supplied to the data line in response to a scan signal supplied to the gate line.

The color filter array substrate includes color filters formed in units of liquid crystal cells, a black matrix for separating color filters and reflecting external light, a common electrode for supplying a reference voltage commonly to the liquid crystal cells, .

The thin film transistor substrate thus manufactured and the color filter array substrate are aligned by aligning each other, then the liquid crystal is injected and sealed.

As described above, there is an increasing demand for a touch panel capable of recognizing a touch area and transmitting other information in response to the touch area through a hand or a separate input device. Currently, such a touch panel is applied to the outer surface of a liquid crystal display device.

The touch panel is simple, has few malfunctions, is easy to carry, can input characters without any other input device, and has a merit that a user can easily recognize a usage method.

Such a touch panel senses the coordinates of a contact point, and a metal electrode is formed on the upper plate or the lower plate, and a resistive type (Resistive type A capacitance type in which an equal potential is formed on the conductive film and a position where the voltage change of the upper and lower plates is sensed according to the contact, a LC value derived as the electronic pen touches the conductive film is read, And an electromagnetic induction type (electro magnetic type) for sensing.

Among them, a touch panel of a capacitive type includes a plurality of X electrodes and a plurality of Y electrodes formed on a transparent substrate so as to be arranged to cross each other with an insulating layer therebetween, and is formed between the X electrode and the Y electrode And determines whether or not the corresponding portion is contacted.

According to the touch sensing method, a resistance method, a capacitance method, and an infrared sensing prevention are categorized. Recently, in consideration of convenience of manufacturing method and sensing power, recently, a capacitance method is attracting attention.

Hereinafter, a conventional touch panel-attached liquid crystal display device will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a conventional touch panel-attached liquid crystal display device, and FIG. 2 is a cross-sectional view showing a corresponding relationship with a case top in a conventional touch panel-attached liquid crystal display device.

1, a conventional touch panel-attached liquid crystal display device includes first and second substrates 1 and 2 opposed to each other, a liquid crystal layer 3 filled between the first and second substrates 1 and 2, A liquid crystal panel 10 including first and second polarizers 4a and 4b attached to the back surface of the first substrate 2 and the back surface of the second substrate 2; A touch panel 20 driven in a capacitive manner and a cover glass 30 for protecting the upper portion of the touch panel 20.

On the first substrate 1 of the liquid crystal panel 10 are formed gate lines and data lines which intersect with each other to define pixel regions and data lines which are formed at intersections of the gate lines and the data lines A thin film transistor (TFT) and a thin film transistor array in which pixel electrodes (not shown) are formed in the pixel region are formed.

A PCB (Printed Circuit Board) 8 for driving the gate line and the data line is further formed on one side of the first substrate 1 of the liquid crystal panel 10.

On the second substrate 2, a black matrix layer, a color filter layer, and a common electrode (not shown, Vcom (applied voltage)) are formed.

In order to protect the touch panel 20, a cover glass 30 is further formed on the touch panel.

Here, the touch panel 20 has a different internal structure according to the method. For example, as shown in FIG. 2, a touch sensing method using a capacitance change at a touch point is referred to as a capacitance method.

In this type of structure, first and second electrodes 24 (not shown) are formed on the substrate 21 in a direction intersecting with each other. Sensing by the capacitance value formed between the first and second electrodes .

Here, the first electrode 24 is formed in a pattern spaced apart from one direction, and the spaced patterns are electrically connected to the lower substrate 21 through the connecting metal 22. A first insulating layer 23 is interposed between the connection metal 22 and the first electrode 24 and a contact hole is formed in the first insulating layer 23 to connect the connection metal 22 and the first Electrode 24 is connected.

On the other hand, a pad electrode 42, to which a signal is transmitted and applied to be controlled by an external driving circuit 35a, is formed on the layer forming the connecting metal 22, And a routing line 32 for transmitting signals to the first electrodes 24 and the second electrodes (not shown), respectively.

A second insulating layer 25 may be further formed on the first insulating layer 23 including the first electrode 24 to protect the first electrode 24. In this case, the first and second insulating films 24 and 25 may not be formed on the outer side so that the pad electrode 42 is opened. Meanwhile, the second electrode may be formed on the second insulating layer 25 in a direction crossing the first electrode 24.

A touch driving circuit 35a for driving the touch panel is further formed on one side of the touch panel 20. More specifically, a driving chip 36 is mounted on a flexible substrate 35, As shown in FIG. The flexible substrate 35 is bonded to the pad electrode 42 of the substrate 21 and a driving signal is transmitted to the touch panel 20 from the driving chip 36.

When such a touch panel is applied to a liquid crystal display device, for example, a polarizing plate 26 is formed on the second insulating film 25, and the upper side and the side surface of the touch panel are covered with a case top 50 .

In recent years, due to the trend of narrow bezel, the area of the outer frame gradually decreases, the area of the case top 50 functioning as case water is reduced, and the area of the touch panel 20 Is exposed as it is, and this portion is visible to the user.

However, the conventional touch panel type liquid crystal display device has the following problems.

First, according to the low-bezel tendency, if the area of the case top is reduced to assemble with the touch panel, there is a phenomenon that the routing wiring of the touch panel for connection between the electrode and the pad electrode is visible to the user.

Second, in order to prevent the flow of the touch panel when the touch panel is assembled in the case top, the light-shielding tape may be attached to the inner surface of the case top of the touch panel so as to cover the portion corresponding to the routing wiring, In the process, such a light-shielding tape is a portion to be corresponded to the inside of the case top, and when exposed to the outside of the case top, it is directly exposed, and the appearance quality is lowered.

Third, in the conventional touch panel type liquid crystal display device, the touch panel and the liquid crystal panel are formed separately from each other, and then the two are bonded together through the adhesive layer. The number of the glass substrates, A total of four to five substrates for both the touch panel and the cover glass were required, making it impossible to make the entire liquid crystal display slim. That is, for example, the thickness of the glass substrate is about 0.7 T (mm), and the glass substrate is used as the thickest part in the device. These glass substrates are used in touch glasses, liquid crystal panels, and cover glasses for protecting the touch panel .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a touch panel, which is formed on the rear side of a substrate of a liquid crystal panel, An object of the present invention is to provide an integrated display device.

According to an aspect of the present invention, there is provided a touch panel integrated type display device including a display panel including an active area in the center and an outer area surrounding the active area; First and second pad electrodes formed on the one surface of the display panel and corresponding to the edges of the outer region, First and second wiring lines for connecting the first and second pad electrodes to the first and second electrodes, respectively; and a second wiring line formed on the one surface of the display panel so as to cover the first and second routing lines, A polarizing plate formed on the one surface of the display panel so as to cover the first and second electrodes, the first and second pad electrodes, and the first and second routing wirings; And a case top for casing the polarizing plate and the display panel at the edge of the polarizing plate.

The visibility shielding pattern is a black resin.

Here, the first electrode may include first diamond patterns formed of a plurality of spaced apart transparent electrodes, and a connecting metal of another layer connecting the first diamond patterns, and the second electrode may include a plurality of spaced apart second diamond patterns And a connection pattern for connecting the first diamond patterns and the second diamond patterns are formed integrally with a transparent electrode. In this case, it is preferable that the first diamond patterns of the first electrode and the second diamond patterns and the connection pattern of the second electrode are formed in the same layer as the transparent electrode.

An insulating film is further formed between the one surface of the display panel and the first diamond patterns, the second diamond patterns, and the connection pattern, and the insulating film includes a contact hole, One electrode and the connection metal are electrically connected. At this time, the first and second pad electrodes and the first and second routing wires and the connection metal are formed of the same metal in the same layer.

Here, the visible light shielding pattern may be formed on the insulating film.

The display panel is any one of a liquid crystal display panel, an electrophoretic display panel, an organic light emitting display panel, and a plasma display panel.

The flexible printed circuit board may be connected to the driving unit of the display panel. In this case, the driving unit of the display panel may be a bent type or a flat type.

Meanwhile, the polarizer is formed by opening the pad electrode. At this time, the visible light shielding pattern may be integrally formed on the polarizing plate. Here, the visibility shielding pattern is a black resin.

The visibility shielding pattern is formed on the polarizing plate so as to correspond to an area of the display panel excluding the active area.

In this case, the polarizing plate is composed of a laminate of an optical layer and first and second protective layers on and under the optical layer, and the visible light shielding pattern is formed on one of the optical layer, the first protective layer and the second protective layer .

The polarizing plate is composed of a laminate of an optical layer and first and second protective layers above and below the optical layer, and the visible light shielding pattern is formed on the surface of the first protective layer or the second protective layer.

The above-described touch panel integrated display device of the present invention has the following effects.

The routing wiring exposed from the casing water is further formed with a visibility shielding pattern so as to cover this portion, thereby improving the problem that the routing wiring is visible to the user.

In this case, the visibility shielding pattern is formed so as to cover the routing wiring on the side adjacent to the user. When the routing wiring is exposed to the outside, the reflected light is prevented from being reflected by the external light and interference light can be emitted from the bottom.

Further, the visibility shielding pattern is formed together in the process of forming a touch panel or the process of forming a polarizing plate, so that an effect of preventing visibility can be obtained without increasing the number of steps.

1 is a cross-sectional view of a conventional touch panel-attached liquid crystal display device
2 is a cross-sectional view showing a corresponding relationship with a case top in a conventional touch panel-attached liquid crystal display device
3 is a cross-sectional view showing an active region of the touch panel integrated display device of the present invention
Fig. 4 is a plan view showing the entire area of the touch panel including the active area of Fig.
5 is a structural cross-sectional view of a touch panel integrated display device taken along line I-I ', II-II' of FIG. 4 according to the first embodiment of the present invention
6 is a structural cross-sectional view of a touch panel integrated display device according to a second embodiment of the present invention, taken along line I-I ', II-II'
7 is a plan view of a touch panel of a touch panel integrated display device according to a third embodiment of the present invention
Figs. 8A and 8B are a plan view and a cross-sectional view of a polarizing plate attached on the touch panel in Fig. 7
9A and 9B are cross-sectional views showing a modification of the polarizing plate in the touch panel integrated display device according to the third embodiment of the present invention

Hereinafter, a touch panel integrated display device of the present invention will be described in detail with reference to the accompanying drawings.

First, the connection relationship between the active area of the touch panel integrated display device of the present invention, the pad area of the touch panel, and the FPC will be described.

FIG. 3 is a cross-sectional view illustrating an active area of the touch panel integrated display device according to the present invention, and FIG. 4 is a plan view showing the entire area of the touch panel including the active area of FIG.

3 and 4, a touch panel integrated display device according to the present invention includes a first substrate 100 and a second substrate 200, which are opposed to each other, and a display device formed integrally with the touch panel 400 is a liquid crystal panel. A liquid crystal panel 1000 including a liquid crystal layer 300 filled between the first and second substrates 100 and 200 and a liquid crystal panel 1000 including a touch panel 400).

Here, on the first substrate 100 in the liquid crystal panel 1000, a plurality of gate lines and data lines that define pixel regions intersecting with each other, and thin film transistor arrays (not shown) including thin film transistors formed in the pixel regions Is formed.

A black matrix layer 201, a color filter layer 202 (R 202a, G 202b, and B 202c), and a common electrode (not shown) corresponding to the thin film transistor array are formed on the second substrate 200 203 are formed.

At this time, the black matrix layer 201 is formed corresponding to the gate line, the data line, and the thin film transistor of the thin film transistor array.

The color filter layer 202 is formed corresponding to each pixel region.

The common electrode 203 is formed on the black matrix layer 201 and the color filter layers 202 (R, G, B) over the entire surface of the second substrate 200.

A liquid crystal layer 300 is formed between the first and second substrates 100 and 200 including the thin film transistor array and the color filter array. The liquid crystal layer 300 is formed on the edges of the first and second substrates 100 and 200, A seal pattern 250 is further formed to define a region where the liquid crystal layer 300 is filled.

In this case, the seal pattern 250 is a non-display area. On the second substrate 200, the black matrix layer 201 is extended to cover the seal pattern 250 to prevent light leakage.

That is, the area inside the seal pattern 250 is defined as a display area (active area) where the actual display is performed.

A touch panel 400 including a plurality of layers including first and second electrodes is formed on the back side of the second substrate 200 by using the second substrate 200 as a formation surface of the touch panel do.

Here, the touch panel 400 includes a first electrode 403 formed in parallel in the X-axis direction and a plurality of second electrodes 404 formed in parallel in the Y-axis direction.

The first electrode 403 and the second electrode 404 are spaced apart from each other on the insulating layer 402 formed on the backside of the second substrate 200. The first electrode 403 and the second electrode 404 The two electrodes 404 are formed in the shape of a diamond in the sensing region and have different configurations of intersections between the first and second electrodes 403 and 404. That is, the first electrode 403 side is connected to the adjacent diamond shapes through the connection metal 401 connected through the contact hole 402a provided in the insulating film 402, so that the diamond- A common signal is applied to the first electrode 403. A common signal is applied to the second electrode 404 in the Y-axis direction, including a connection pattern of a thin width, which connects the adjacent diamond shapes to each other, on the second electrode 404 side.

The first and second electrodes 403 and 404 are formed of transparent electrodes such as indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO) Is made of a highly conductive material such as molybdenum (Mo) or a molybdenum alloy (for example, Mo / AlNd), silver, copper, aluminum or an alloy of these metals so that the thin- Try to think.

Here, the connection portion of the first electrode 403 is made of a connection metal having high conductivity, and the connection portion of the second metal 404 is made of a transparent electrode, so that a resistance difference between the two electrodes can be generated. The total area of the second electrode 404 may be reduced to less than that of the first electrode 403 to reduce the influence of the resistance difference.

The insulating layer 402 including the contact hole 402a may be an inorganic insulating layer such as an oxide layer or a nitride layer, or an organic insulating layer such as a photo-acryl layer.

The first and second polarizers 110 and 120 are formed on the lower surface of the first substrate 100 of the liquid crystal panel 1000 and the upper surface including the first and second electrodes 403 and 404 do.

Here, since the surface on which the touch panel 400 is formed is not provided with a separate glass substrate or a plastic substrate and the back surface of the second substrate 200 is used for omitting the substrate and the laminating step, (120) is positioned on the upper surface of the touch panel (400).

The first and second polarizing plates 110 and 120 may be provided with adhesive layers on opposite surfaces of the first substrate 100 or the first and second electrodes 403 and 404, And adheres to the lower surface of the first substrate 100 and the first and second electrodes 403 and 404 on the back surface side of the second substrate 200.

In this case, a separate interlayer insulating film (see FIG. 4B) is formed between the upper surfaces of the first and second electrodes 403 and 404 and the second polarizer 120 to protect the first and second electrodes 403 and 404 (See 405 of FIG. In this case, the interlayer insulating film 405 may be formed of the same material as the insulating film 402 described above, for example, an inorganic insulating film such as a nitride film or an oxide film, or an organic insulating film such as photoacryl.

A touch pad area is defined on one side of the touch panel 400. The touch pad area includes a flexible printed circuit (FPC) including a touch controller 431 having pad electrodes 421 to generate a touch driving signal, (Not shown).

The pad electrodes 421 are formed at the same time as the connection metal 401 is formed and the routing wirings 411 for applying signals to the first and second electrodes 403 and 404 are also formed . A routing contact wiring 415 for contact between the routing wiring 411 and the first electrode 403 or the second electrode 404 is formed at each end of the first and second electrodes 403 and 404 .

The pad electrode 421 overlaps with a part of the seal pattern 250 and is electrically connected to the second substrate 250. The pad electrode 421 overlaps the seal pattern 250 on the liquid crystal panel 100 side, 200).

On the other hand, the liquid crystal panel described as an example of the display device in the above-described example may be replaced with an organic light emitting display panel, an electrophoretic display panel, a plasma display panel, or the like.

Hereinafter, a structure for improving the visibility of the routing wiring in the touch panel integrated type display device of the present invention will be described according to embodiments.

* First Embodiment *

FIG. 5 is a structural cross-sectional view of a touch panel integrated display device according to a first embodiment of the present invention, taken along line I-I ', II-II' of FIG.

The touch panel integrated display device according to the first embodiment of the present invention includes a display panel 1000 including an active area in the center and an outer area surrounding the active area, A plurality of first electrodes 403 and a plurality of second electrodes 404 arranged in a direction intersecting with the active area and corresponding to the edges of the outer area on the one surface of the display panel 1000; The first and second pad electrodes 421 and 422 are formed so as to connect the first and second pad electrodes 421 and 423 to the first and second electrodes 403 and 404, Shielding pattern 160 formed on the one surface of the display panel 1000 so as to cover the first and second routing wirings 411 and the first and second electrodes 403 and 404 and the first and second pad electrodes 421 and the first and second routing wirings 411, A second polarizing plate 120 formed on the one surface of the board 1000 and a case top 170 casing the second polarizing plate 120 and the display panel 1000 at the edge of the second polarizing plate 120, .

The display panel 1000 includes a first substrate 100 and a second substrate 200 facing each other and a first substrate 100 and a second substrate 100 facing each other, And a liquid crystal layer 300 filled between the first and second substrates 200 and 200. The first substrate 100 and the first polarizer 110 are further formed on the lower side of the first substrate 100 so that light passing through the liquid crystal layer 300 together with the second polarizer 120 is blocked .

The surface of the display panel on which the touch panel is formed is bonded to the upper surface of the second substrate 200 on the second substrate 200 in the process of forming the touch panel layers A color filter layer array including a black matrix layer 201 and a color filter layer 202 is formed on the second substrate 200 by inverting the second substrate 200 do.

The visible light shielding pattern 160 is a black resin and is an organic insulating film. The visible light shielding pattern 160 covers the entire outer area (area of the touch panel except the active area) to cover the area where the routing wiring 411 is formed As shown in FIG. In this case, the visible light shielding pattern 160 is an organic insulating layer in order to prevent signal interference to the routing wiring 411 to which an electrical signal is applied.

A black matrix layer 201 having a light shielding function is formed in the color filter array of the second substrate 200 on the lower side where the routing wiring 411 is located. However, since the black matrix layer 201 alone can not completely block the reflected light from the routing wiring 411 when external light enters, without the visibility shielding pattern 160, there is a risk that the reflected light is visible to the user. The shielding pattern 160 is formed in a shape that covers the routing wiring 411.

4, the first electrode 403 includes first diamond patterns formed of a plurality of spaced apart transparent electrodes, and another layer of the connection metal 401 connecting the first diamond patterns The second electrode 404 is formed by integrating a plurality of spaced apart second diamond patterns and a connection pattern connecting the second diamond patterns into a transparent electrode. In this case, it is preferable that the first diamond patterns of the first electrode 403 and the second diamond patterns and the connection pattern of the second electrode are formed in the same layer as the transparent electrode in order to reduce the number of masks used. In the illustrated cross-section, the touch panel is used for forming a connection metal 401, for forming a contact hole for connection between the first electrode 403 and the connection metal 401, and for forming the first and second electrodes 403, 404) for forming a pattern of a mask pattern.

Here, a first insulating layer 402 is further formed between the one surface of the display panel 1000 and the first diamond patterns, the second diamond patterns, and the connecting pattern, and the first insulating layer may include a contact hole And the first electrode 403 and the connection metal 401 are electrically connected through the contact hole 402a. At this time, the first and second pad electrodes 421, the first and second routing wirings 411 and the connection metal 401 are formed of the same metal in the same layer.

An unexplained reference numeral 415 denotes a routing contact electrode which is formed of the same layer and the same metal as the layer of the connecting metal 401 and has a first electrode 403 and a second electrode 404, .

In the first embodiment, a second insulating layer 405 is further formed on the first insulating layer 402 including the first and second electrodes 403 and 404. In this case, the second insulating layer 405 may be omitted for protecting the first and second electrodes 403 and 404. The second polarizing plate 120 formed on the second polarizing plate 120 may also serve as a protective function.

In the first embodiment, the visible light shielding pattern 160 is formed in the touch panel formation process. The second insulating film (not shown) is formed on the routing interconnection 160 so as to cover the routing interconnection 160 formed in the outer region. 402). ≪ / RTI > And may be formed on the first insulating layer 401 when the second insulating layer 402 is omitted.

In this case, even if the case top 170, which covers the casing, does not cover the entire outer area, the visibility shielding pattern 160 covers the routing wiring 160, and reflection at the routing wiring 160 at the site So that the lower part of the transmitted light is not transmitted.

Meanwhile, although the display panel 1000 is a liquid crystal display panel, it may be formed of any one of electrophoretic display panel, organic light emitting display panel, and plasma display panel.

For example, when the display panel 1000 is a liquid crystal display panel, a COF (Chip) corresponding to one side of the first substrate 100 and connected to the pad electrode 105 corresponding to the end of the gate line and the data lines On Film 130 and a PCB 150 connected to the other side of the COF 130 are further formed.

Here, the COF 130 may include a plurality of drive ICs (not shown) for transferring signals of data lines or gate lines corresponding to the plurality of data lines or gate lines, 140). In some cases, the signal of the gate lines may be formed in a line on glass (LOG) shape at the edge of the first substrate 100, and a gate driving signal may be transmitted at the LOG. In this case, a part of the COF 130 may further include a connection wiring connected to a gate driving signal output terminal of the PCB 150, and may be connected to the pad electrode of the LOG wiring.

The PCB 150 is connected to the other side of the COF 130 and includes a controller (not shown) for receiving image data from a host system (not shown) to process the image data to a panel and generating various control signals, And a power supply unit for generating and generating a voltage level of the voltage.

In addition, when the gate driver is provided in the form of an LOG wiring, a separate gate PCB is not required, and the PCB 150 can be configured with only one source PCB formed corresponding to the pad electrodes of the data lines.

The pad electrode 421 at the edge of the surface of the second substrate 200 is connected to the flexible printed circuit board 430 to apply a driving signal through the driving chip 431 on the flexible printed circuit board 430 .

Here, the method of forming the touch panel integrated type liquid crystal display device is as follows.

That is, a connection metal 401 and a routing contact electrode 415 are formed in the active region and a routing wiring 411 and a pad electrode 421 are formed in the peripheral region on the back surface of the second substrate 200.

A first insulating layer 402 is formed to cover the connection metal 401, the routing contact electrode 415 and the routing wiring and a contact hole 402a exposing the connection metal 401 is formed.

A first electrode 403 connected to the connection metal 401 is formed through the contact hole 4021 and a second electrode 404 is formed in a direction intersecting the first electrode 403.

Next, a second insulating layer 405 is formed on the first insulating layer 402 to cover the first and second electrodes 403 and 404.

Then, a visible light shielding pattern 160 is formed in a shape covering the routing wiring 160 in the outer area. At this time, the visibility shielding pattern 160 is formed by applying black resin and then developing and exposing it through a photo process.

After the touch panel 400 is formed on the back side of the second substrate 200 and the second substrate 200 is inverted to form a color filter array on the second substrate 200, A thin film transistor array is formed on the first substrate 100.

After the seal pattern 250 is formed on the edge of one of the first and second substrates 100 and 200, the adhesion process is performed to form a liquid crystal layer 300 between the first and second substrates. Or a seal pattern 250 is formed on one of the first and second substrates 100 and 200. A liquid crystal is dropped on one substrate and then the liquid crystal is dropped onto the substrate And a counter substrate are bonded together to define a liquid crystal layer 300 between the first and second substrates 100 and 200. [

The process of attaching the first polarizing plate 110 and the second polarizing plate 120 on the lower surface of the first substrate 100 and the touch panel 400 on the second substrate 200 are respectively proceeded.

The connection process with the FPC 430 including the touch controller 431 and the pad electrode 421 of the touch panel 400 on the back side of the second substrate 200 is then proceeded.

The pad electrode 105 of the first substrate 100 and the PCB 150 are connected to each other via a COF 130 bonded to one side of the PCB 150. The COF 130 includes a drive IC 140 for transmitting a drive waveform to be inputted to a gate line or a data line.

Then, the FPC 430 is attached to the side surface of the second substrate 200 so that the touch electrode formed on one side of the second substrate 200 can be stuck through the touch controller 431 .

The first and second polarizing plates 110 and 120 include a display region of the liquid crystal panel 1000 and overlap the inner portion of the seal pattern 250.

In this case, at least the second polarizing plate 120 is formed so that the second polarizing plate 120 is opened to the upper side of the pad electrode 421 so that the pad electrode 421 is exposed. This is for connection between the pad electrode 421 and the flexible printed circuit board (FPC) 430.

The FPC 430 connected to the pad electrode 421 is connected to the PCB 150 and is folded down to the lower portion of the liquid crystal panel 1000. The FPC 430 is connected to the pad electrode 421. The pad electrode 421 is formed outside the second polarizer 120, All.

The flexible printed circuit board is connected to the driving unit of the display panel. In this case, the driving unit of the display panel includes a bent type bent not only in the illustrated flat type but also folded back to the back side of the lower first substrate 100 ) Type can be applied.

* Second Embodiment *

6 is a structural cross-sectional view of a touch panel integrated display device according to a second embodiment of the present invention, taken along line I-I ', II-II' of FIG.

6, the touch panel integrated type liquid crystal display device according to the second embodiment of the present invention includes the FPC 430 instead of the FPC 430, in which the wire 470 extends from the back side of the second substrate 200 to the side And directly connected to the COF 130 including the drive IC 131 of the liquid crystal display panel 1000. [

* Third Embodiment *

FIG. 7 is a plan view of a touch panel of a touch panel integrated display device according to a third embodiment of the present invention, and FIGS. 8A and 8B are a plan view and a sectional view of a polarizer attached on the touch panel in FIG.

In the above-described embodiments, an example in which a visible light shielding pattern is formed on the touch panel side and an example in which a visible light shielding pattern is formed on the polarizing plate side in the touch panel integrated display device according to the third embodiment described later is shown.

7, the touch panel 400 of the touch panel integrated display device according to the third embodiment of the present invention has an active area A / A where the center thereof is displayed and sensed, Is defined as an outer region.

A flexible printed circuit board 430 connected to the routing wiring 411 and pad electrodes (not shown) formed at the ends of the routing wiring 411 is formed in the outer area.

8A and 8B, a visible light shielding pattern 125 is formed on the second polarizing plate 120 (upper polarizing plate) located on the touch panel 400 except for the active area.

The second polarizing plate 200 is formed to open the pad electrode side and is relatively smaller than the size of the touch panel 400 and overlaps a part of the outer area of the touch panel 400.

In this case, the visible light shielding pattern 125 may be integrally formed on the polarizing plate. Here, the visibility shielding pattern is composed of black resin components, and is formed on the polarizing plate in correspondence with an area of the display panel (see 1000 in FIG. 5) except for the active area.

9A and 9B are cross-sectional views showing a modification of the polarizing plate in the touch panel integrated type display apparatus according to the third embodiment of the present invention.

9A, in the touch panel integrated display device according to the third embodiment of the present invention, the polarizing plate 120 includes an optical layer 121 and first and second protective layers 121, Shielding pattern 125 is formed on the surface of the second protective layer 123 by surface treatment. In this case, for example, an exposure process, a slit coating, a printing process, or the like can be applied to the surface treatment.

In this case, the optical layer 121 constituting the polarizing plate 120 is made of PVA (Polyvinyl Alcohol) film and is stretched uniaxially. Then, iodine molecules or dichroic dyes are stretched between the PVA polymers in one direction ), Thereby allowing only light in one direction to pass therethrough and absorbing light in the other direction, thereby taking on the function of the polarizer.

The first and second protective layers 122 and 123 formed on the upper and lower surfaces of the optical layer 121 are for protecting the optical layer 121 and are TAC (triacetate cellulose) (121).

The visible light shielding pattern 125 may be formed on the first passivation layer 122 although only the example formed on the surface of the second passivation layer 123 is shown.

9B, the polarizing plate 120 is composed of a laminate of an optical layer 121 and first and second protective layers 122 and 123 above and below the optical layer 121, The light shielding pattern 125 may be formed in the optical layer 121 and the first and second protective layers 122 and 123.

For example, when the visible light shielding pattern 125 is included in the optical layer 121, when the iodine molecule or the dichroic dye is oriented, a visible light shielding pattern 125 is formed on a portion corresponding to the active region outer region Can be defined.

Meanwhile, the method used in the touch panel can be applied to both a mutual capacitive type and a self capacitive type. For example, a case where a driving voltage is applied to the first electrode and a voltage drop that is changed according to whether the second electrode is touched is referred to as a mutual capacitive type, and the first and second A self-capacitance method in which a voltage is sequentially applied to the electrodes, and a change depending on the touch is detected and detected for each of the first and second electrodes.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Will be apparent to those of ordinary skill in the art.

100: first substrate 105: (liquid crystal panel) pad electrode
110: first polarizer 120: second polarizer
130: COF 131, 140: Drive IC
150: PCB 160: Visible shading pattern
170: Case top 200: Second substrate
201: black matrix layer 202: color filter layer
203: common electrode 250: seal pattern
300: liquid crystal layer 400: touch panel
401: connecting metal 402: insulating film
402a: Contact hole 403: First electrode
404: second electrode 405: interlayer insulating film
411: routing wiring 415: routing contact electrode
421: (touch panel) pad electrode 430: FPC
470: wire

Claims (15)

A display panel including a central active region and an outer peripheral region surrounding the active region;
A plurality of first electrodes and a plurality of second electrodes arranged on one surface of the display panel in a direction intersecting with the active areas and intersecting with each other;
First and second pad electrodes formed on the one surface of the display panel so as to correspond to the edges of the outer area and first and second pad electrodes respectively corresponding to the first and second pad electrodes, A second routing wiring;
A polarizing plate formed on the one surface of the display panel so as to cover the first and second electrodes, the first and second pad electrodes, and the first and second routing wirings;
A visual shield pattern integrally formed on the polarizing plate, the visibility shield pattern being positioned corresponding to the outer area, the first and second routing interconnection lines; And
And a case top for casing the polarizing plate and the display panel at an edge of the polarizing plate. The method according to claim 1,
Wherein the visibility shielding pattern is a black resin. The method according to claim 1,
Wherein the first electrode includes first diamond patterns composed of a plurality of spaced transparent electrodes and another metal layer connecting the first diamond patterns,
Wherein the second electrode is formed by integrating a plurality of spaced second diamond patterns and a connection pattern connecting the second diamond patterns into a transparent electrode. The method of claim 3,
Wherein the first diamond patterns of the first electrode and the second diamond patterns and the connection pattern of the second electrode are formed in the same layer as the transparent electrode. 5. The method of claim 4,
An insulating film is further formed between the one surface of the display panel and the first diamond patterns, the second diamond patterns, and the connection pattern,
Wherein the insulating layer has a contact hole, and the first electrode and the connection metal are electrically connected through the contact hole. The method of claim 3,
Wherein the first and second pad electrodes and the first and second routing wirings and the connection metal are formed of the same metal in the same layer. The method according to claim 1,
Wherein the display panel is one of a liquid crystal display panel, an electrophoretic display panel, an organic light emitting display panel, and a plasma display panel. 6. The method of claim 5,
Wherein the visible light shielding pattern is located above the insulating film. 8. The method of claim 7,
Wherein the flexible printed circuit board is connected to the driving unit of the display panel. The method according to claim 1,
And the polarizing plate exposes the pad electrode.
delete delete delete The method according to claim 1,
Wherein the polarizing plate is composed of a laminate of an optical layer and first and second protective layers above and below the optical layer, and the visibility shielding pattern is formed on the optical layer, the first protective layer and the second protective layer Wherein the touch panel is a touch panel. The method according to claim 1,
Wherein the polarizing plate is formed of a laminate of an optical layer and first and second protective layers on and under the optical layer and the visible light shielding pattern is formed on the surface of the first protective layer or the second protective layer A touch panel integrated display device.

Images