KR20080012127A - Display device and menufacturing method thereof - Google Patents

Abstract

A display device and a manufacturing method thereof are provided to remove a PCB(Printed Circuit Board) for a touch panel by supplying a sensor signal to the touch panel by a PCB for a display panel, thereby reducing production cost and process cost. A display device comprises a display panel(10), a first sensor electrode(81), a third substrate(40), a second sensor electrode(82), sensor lines(71-76), contact electrodes(101-108) and short points(61~64). A first substrate(20) and a second substrate(30) are formed to each other in the display panel. The first sensor electrode is formed on the first substrate. The third substrate is formed at a predetermined distance from the first substrate. The second sensor electrode is formed in the rear of the third substrate to contact the first sensor electrode when a user touches the second sensor electrode. The sensor lines are connected to the first and second sensor electrodes respectively and electrically. The contact electrodes are formed on the second and third substrates. The short points are formed between the contact electrodes on the second and third substrates to connect the contact electrodes.

Description

Display device and manufacturing method thereof {DISPLAY DEVICE AND MENUFACTURING METHOD THEREOF}

1 is an exploded perspective view illustrating a display device according to a first embodiment of the present invention.

FIG. 2 is a plan view illustrating a display panel of the display device illustrated in FIG. 1.

3 is a diagram illustrating a third substrate for a touch panel of the display device illustrated in FIG. 1.

4 to 6 are plan views illustrating display devices according to mounting positions of a driver for a touch panel.

FIG. 7 is a cross-sectional view illustrating a cross section taken along line II ′ of the display device illustrated in FIG. 1.

FIG. 8 is a cross-sectional view illustrating a cross section taken along line II-II ′ of the display device illustrated in FIG. 1.

9 is a cross-sectional view illustrating a cross section after the touch panel is pressed.

10 is a cross-sectional view illustrating a display device according to a second exemplary embodiment of the present invention.

11 is a flowchart illustrating a manufacturing method of the display device illustrated in FIG. 1.

12 is an exploded perspective view illustrating a display device according to a third exemplary embodiment of the present invention.

FIG. 13 is a plan view illustrating a display panel of the display device illustrated in FIG. 12.

FIG. 14 is a plan view illustrating a third substrate of the display device illustrated in FIG. 12.

FIG. 15 is a flowchart illustrating a method of manufacturing the display device illustrated in FIG. 12.

<Brief Description of Drawings>

10: display panel 12: organic light emitting display panel

20: first substrate 30: second substrate

36: sealing material 40: third substrate

50: flexible circuit film 61 to 64: first to fourth short point

71: first sensor line 72: second sensor line

73: third sensor line 74: fourth sensor line

75: first auxiliary sensor line 76: second auxiliary sensor line

81: first sensor electrode 82: second sensor electrode

85: first connection electrode 86: second connection electrode

101 to 108: first to eighth contact electrodes

100: touch panel 110: spacer

120: adhesive 130: thin film transistor array

131: planarization film 132: partition wall

150: organic light emitting diode 151: organic light emitting layer

152: anode electrode 153: cathode electrode

201: 9th contact electrode 202: 10th contact electrode

210: fifth short point 211 to 214: sixth to ninth short point

220: fifth sensor line 230: linearization pattern

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a method for manufacturing the same, and more particularly, to a low cost thin and light display device and a method for manufacturing the same.

There are various types of displays for displaying an image, such as a cathode ray tube, a liquid crystal display, a plasma display panel, an electro luminescence display, and the like. In order to easily input information on the screen, such display apparatuses use a touch panel attached to the upper portion of the display apparatus to input information corresponding to the position when the user presses the surface with a pressing means such as a pen or a finger to use the input apparatus.

In a display device having a touch panel, when a user presses the touch panel with a pen or a finger, an analog coordinate signal of a position is connected to a sensor electrode, a sensor line connected to the sensor electrode, and a sensor line to supply a sensor signal. It is supplied to the driver for a touch panel through the circuit board for panels. The driver for the touch panel converts the input analog coordinate signal into a digital coordinate signal and supplies it to the system.

The system generates a digital data signal corresponding to the digital coordinate signal and supplies the same to the driver for the touch panel. The data signal in digital form is supplied to the driver for the display device through the circuit board for the liquid crystal panel. The digital data signal supplied to the driver for the display device is converted into an analog data signal and supplied to the signal line of the display device. Accordingly, the display device implements an image of the pressing point of the touch panel.

At this time, the circuit board for the touch panel is attached to the touch panel by a connection process such as soldering. However, in the touch panel circuit board connection process, a connection failure such as disconnection or poor soldering of the connection portion formed on the touch panel circuit board occurs. In addition, since a conventional display device includes a circuit board for a touch panel and a circuit board for a display device, the process is complicated because two connection processes are required to attach each circuit board. In addition, the conventional display device has a problem that it is difficult to reduce the thickness due to the circuit board for the touch panel.

Accordingly, an aspect of the present invention is to provide a display device in which a signal is directly supplied from a display device to a touch panel and a method of manufacturing the same.

In order to solve the above technical problem, the present invention is a second sensor electrode; A sensor line electrically connected to each of the first and second sensor electrodes; Contact electrodes formed on the second and third substrates; And a short point formed between the contact electrodes on the second and third substrates to connect them.

In addition, when the first and second sensor electrodes are connected, a driver for a touch panel, in which a coordinate signal for the connected point is input, is further provided.

In this case, the touch panel driver is mounted in the display panel driver for driving at least one of the gate line and the data line formed on the second substrate.

And a plurality of signal lines connecting the contact electrodes to the display panel driver.

Here, the driver for the touch panel is mounted on a printed circuit board connected with the second substrate via a flexible circuit film.

The third substrate may be an optical film, a polarizing plate, or a glass substrate.

The short point is preferably formed of a conductive metal material including at least one of gold and silver.

In addition, it is preferable to further include a spacer for maintaining a cell gap between the first and second sensor electrodes.

The sensor line may include first and second sensor lines electrically connected to two opposite sides of the first sensor electrode. Third and fourth sensor lines electrically connected to the remaining side edges of the second sensor electrode on which the first and second sensor lines are not formed; And first and second auxiliary sensor lines formed on a rear surface of the third substrate and electrically connected to the first and second sensor lines, respectively.

In this case, the contact electrodes formed on the second substrate include first to fourth contact electrodes supplying reference voltages to the first to fourth sensor lines, and are formed on the third substrate to form the third and fourth sensors. And fifth to eighth contact electrodes connected to a line and one end of each of the first and second auxiliary sensor lines and formed to correspond to the first to fourth contact electrodes, respectively.

The short points may include first to fourth short points electrically connecting the first to fourth contact electrodes and the fifth to eighth contact electrodes, respectively.

The sensor lines may include first to fourth sensor lines electrically connected to the first sensor electrodes of the first substrate. And a fifth sensor line electrically connected to side edges of the second sensor electrode of the third substrate.

First to fourth contact electrodes formed on the second substrate and supplying a reference voltage to the first to fourth sensor lines; Fifth to eighth contact electrodes formed on the third substrate and formed to correspond to the first to fourth contact electrodes; A ninth contact electrode formed on the second substrate to supply a sensor signal from the fifth sensor line to the outside; And a tenth contact electrode connected to the fifth sensor line of the third substrate and formed to correspond to the ninth contact electrode.

The short points may include first to fourth short points electrically connecting the first to fourth contact electrodes and the fifth to eighth contact electrodes, respectively; And a fifth short point formed between the ninth contact electrode and the tenth contact electrode to electrically connect them.

And sixth to ninth short points electrically connecting the fifth to eighth contact electrodes and the first to fourth sensor lines, respectively.

And a linearization pattern formed at an edge of the first sensor electrode to form an equipotential of the first sensor electrode.

In order to solve the above technical problem, the present invention includes forming at least one contact electrode on a second substrate of the display panel in which the first substrate and the second substrate face each other; Forming a first sensor electrode on the first substrate; Forming a second sensor electrode on a rear surface of the third substrate facing the first substrate; Forming sensor lines electrically connected to the first and second sensor electrodes of the first and third substrates; Forming a contact electrode on the third substrate, the contact electrode corresponding to the contact electrode of the second substrate and electrically connected to the sensor line on the rear surface of the third substrate; And forming a short point connecting the corresponding contact electrodes of the second and third substrates to each other.

The forming of the sensor line may include forming first and second sensor lines on two opposite sides of the first sensor electrode of the first substrate; Forming first and second auxiliary sensor lines corresponding to the first and second sensor lines on the third substrate; And forming third and fourth sensor lines on the remaining both sides of the second sensor electrode except the sides on which the first and second auxiliary sensor lines are formed.

The method may further include forming a spacer for maintaining a cell gap between the first and second sensor electrodes after the forming of the first and second sensor electrodes.

The forming of the sensor line may include forming first to fourth sensor lines connected to the first sensor electrode; And forming a fifth sensor line connected with the second sensor electrode.

In the forming of the fifth sensor line, the fifth sensor line further includes forming a closed curve along an outer edge of the second sensor electrode.

In addition, after the forming of the first sensor electrode, the method may further include forming a linearization pattern for an equipotential of the first sensor electrode.

Other technical problems and advantages of the present invention in addition to the above technical problem will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a display device according to a first exemplary embodiment of the present invention, FIG. 2 is a plan view of the display panel shown in FIG. 1, and FIG. 3 is a third substrate shown in FIG. 1. One floor plan.

1 to 3, a display device according to a first embodiment of the present invention includes a display panel 10 displaying an image, a touch panel 100 formed on the display panel 10, and a display panel ( 10) and a flexible circuit film 50 for supplying driving signals and sensor signals to each of the touch panel 100.

Specifically, the display panel 10 will be described with an example of a liquid crystal panel including a first substrate 20, a first substrate 20 and a second substrate 30 bonded to each other with the liquid crystal interposed therebetween. do.

The first substrate 20 includes a common electrode having a color filter formed on a rear surface thereof and forming an electric field facing the pixel electrode. The first substrate 20 may further include a black matrix to prevent light leakage.

The second substrate 30 includes a thin film transistor array. The thin film transistor array includes a thin film transistor connected to a gate line and a data line in a pixel region formed by intersections of a gate line, a data line, a gate line, and a data line formed between the gate line and the gate insulating layer, and a pixel connected to the thin film transistor. An electrode.

The second substrate 30 is formed with first to fourth contact electrodes 101 to 104 for supplying a reference voltage to the third substrate 40. The first to fourth contact electrodes 101 to 104 are formed in respective corner regions on both sides of the lower end of the second substrate 30. The first to fourth contact electrodes 101 to 104 are formed by the same process when the thin film transistor array of the second substrate 30 is formed. In addition, signal lines 109 connected to the first to fourth contact electrodes 101 to 104 are further formed.

The signal lines 109 apply a reference voltage applied from an external touch panel controller (not shown) to the first to fourth contact electrodes 101 to 104, and touch the sensor signal detected by the touch panel 100. It is applied by the driver for a panel (not shown).

The touch panel 100 is formed by bonding the third substrate 40 to the first substrate 20 of the display panel 10.

The touch panel 100 may include the first sensor electrode 81 formed on the upper surface of the first substrate 20, the second sensor electrode 82 formed on the rear surface of the third substrate 40, and the first sensor electrode 81. First and second sensor lines 71 and 72 formed at both sides, and third and fourth sensor lines 73 and 74 formed at both sides of the second sensor electrode 82 are included.

The first sensor electrode 81 is formed to correspond to the display area of the display panel 10.

The first and second sensor lines 71 and 72 are formed to face each other with the first sensor electrode 81 therebetween. In this case, the first and second sensor lines 71 and 72 are formed by floating in the Y-axis direction as shown in FIG. 2. However, the first and second sensor lines 71 and 72 may be formed in the X-axis direction. The first and second sensor lines 71 and 72 are formed to be in direct contact with each of the left and right sides of the first sensor electrode 81, or are stacked on each of the left and right sides of the first sensor electrode 81. Or by a first connection electrode 85 that electrically connects the first and second sensor lines 71 and 72 to the first sensor electrode 81.

A plurality of first connection electrodes 85 are formed between the first sensor line 71 and the first sensor electrode 81 and between the second sensor line 72 and the first sensor electrode 81. The first connection electrode 85 is formed of the same metal as either the first sensor line 71 or the first sensor electrodes 81.

Third and fourth sensor lines 73 and 74 are formed on both sides of the second sensor electrode 82 and the second sensor electrode 82 to supply a reference voltage to the rear surface of the third substrate 40. The first and second auxiliary sensor lines 75 and 76 to be electrically connected to the first and second sensor lines 71 and 72 are formed on the rear surface of the third substrate 40. In addition, the third substrate 40 includes fifth and sixth contact electrodes 105 and 106 formed at one end of the third and fourth sensor lines 73 and 74, and first and second auxiliary sensor lines 75. And seventh and eighth contact electrodes 107 and 108 formed at one end of the 76.

The third substrate 40 uses a transparent substrate such as a transparent film, a polarizing plate, or a glass substrate. The second sensor electrode 82 is formed on the rear surface of the transparent substrate.

The second sensor electrode 82 is formed to face the first sensor electrode 81.

The third and fourth sensor lines 73 and 74 are formed to be electrically connected to the second sensor electrode 82. In this case, the third and fourth sensor lines 73 and 74 are formed in the vertical direction with the first and second sensor lines 71 and 72.

The third sensor line 73 is formed on the upper side of the second sensor electrode 82 in the X axis direction, and the fourth sensor line 74 is formed on the lower side of the second sensor electrode 82 in the X axis direction. do.

Here, the third and fourth sensor lines 73 and 74 are formed to be in direct contact with each of the upper and lower sides of the second sensor electrode 82 so as to be electrically connected to the second sensor electrode 82. It is laminated | stacked on the sensor electrode 82, or is connected via the 2nd connection electrode 86. FIG. In the embodiment of the present invention, it will be described that the third and fourth sensor lines 73 and 74 are electrically connected to the second sensor electrode 82 through the second connection electrode 86.

The second connection electrode 86 electrically connects the upper side of the second sensor electrode 82 and the third sensor line 73. The second connection electrode 86 electrically connects the lower side of the second sensor electrode 82 and the fourth sensor line 74. In this case, the second connection electrode 86 is formed of the same material as any one of the third and fourth sensor lines 73 and 74 or the second sensor electrode 82. In addition, a plurality of second connection electrodes 86 may be formed.

The fifth contact electrode 105 is formed at one end of the third sensor line 73. That is, the fifth contact electrode 105 is formed in the lower left corner region of the third substrate 40.

The sixth contact electrode 106 is formed at one end of the fourth sensor line 74. That is, the sixth contact electrode 106 is formed in the lower right corner region of the third substrate 40.

Meanwhile, the fifth and sixth contact electrodes 105 and 106 may be formed in the same corner region.

The first auxiliary sensor line 75 is formed to correspond to the first sensor line 71 shown in FIG. 2, and the second auxiliary sensor line 76 is formed to correspond to the second sensor line 72. The first and second auxiliary sensor lines 75 and 76 are formed of the same conductive material as the third and fourth sensor lines 73 and 74.

One end of each of the first and second auxiliary sensor lines 75 and 76 is formed with seventh and eighth contact electrodes 107 and 108.

The seventh and eighth contact electrodes 107 and 108 are preferably formed to be insulated from the fifth and sixth contact electrodes 105 and 106, respectively. In addition, the seventh and eighth contact electrodes 107 and 108 are formed to be separated from each other at left and right edges of the third substrate 40. In this case, the seventh and eighth contact electrodes 107 and 108 may be formed on both edge regions of the third substrate 40.

The fifth to eighth contact electrodes 105 to 108 are electrically connected to the first to fourth contact electrodes 101 to 104 through the first to fourth short points 61 to 64.

The flexible circuit film 50 is attached to one side of the display panel 10 to supply a panel driving signal to the display panel 10 and to supply a reference voltage to the touch panel 100. In this case, the reference voltage supplied from the driver for the touch panel is supplied to at least one of the first to fourth short points 61 to 64 through the signal lines 109 formed on the display panel 10. In addition, the flexible circuit film 50 supplies the sensor signal from the touch panel 100 to the driver for the touch panel. The sensor signal supplied from the touch panel 100 is supplied to the driver for the touch panel through the other one of the first to fourth short points 61 to 64.

4 to 6 are plan views of display apparatuses shown for respective positions in which a driver for a touch panel is mounted.

Referring to FIG. 4, the touch panel driver 250 is mounted on the display panel 10. The driver 250 for the touch panel is connected to the signal lines 109 respectively connected to the short points 61 to 64 shown in FIG. 3 to supply a reference voltage to the touch panel 100, and from the touch panel 100. To detect the sensor signal.

Meanwhile, the touch panel driver 250 may be mounted on the printed circuit board 51 as shown in FIG. 5. That is, the touch panel driver 250 is mounted on the printed circuit board 51 on which the display panel driver 160 for driving the display panel 10 is mounted. In this case, the printed circuit board 51 is electrically connected to the display panel 10 through the flexible circuit film 50.

As shown in FIG. 6, the touch panel driver may be formed in the display panel driver 170 for driving the display panel 10 and mounted on the display panel 10. In this case, the display panel driver 170 having the touch panel driver therein is mounted on the printed circuit board 51. The display panel driver 170 in which the touch panel driver is embedded may be mounted on the display panel 10.

FIG. 7 is a cross-sectional view illustrating a cross section taken along line II ′ of the display device illustrated in FIG. 1.

Referring to FIG. 7, the first substrate 20 and the third substrate 40 are bonded by the adhesive 120. The adhesive 120 is formed along the edge region of the first substrate 20. The adhesive 120 is formed to overlap the areas where the first to fourth sensor lines 71 to 74 and the first and second auxiliary sensor lines 75 and 76 are formed.

The first short point 61 connects the first and seventh contact electrodes 101 and 107 formed on the second substrate 30, and the third short point 63 connects the third and fifth contact electrodes 103,. 105). Although not shown in FIG. 7, the second short point connects the second and eighth contact electrodes between the second substrate 30 and the third substrate 40, and the fourth short point is the fourth and sixth points. Connect the contact electrode.

FIG. 8 is a cross-sectional view illustrating a cross section taken along line II-II ′ of the display device illustrated in FIG. 1.

Referring to FIG. 8, the display device includes an auxiliary short point 78 that electrically connects each of the first and second sensor lines 71 and 72 and each of the first and second auxiliary sensor lines 75 and 76. do.

The auxiliary short point 78 may connect the first and second sensor lines 71 and 72 formed on the first substrate 20 and the first and second auxiliary sensor lines 75 and 76 formed on the third substrate 40. Connect electrically. Accordingly, the reference voltage applied to the first and second auxiliary sensor lines 75 and 76 is supplied to the first and second sensor lines 71 and 72 through the auxiliary short point 78. In addition, a plurality of auxiliary short points 78 may be formed between the first sensor line 71 and the first auxiliary sensor line 75, and between the second sensor line 72 and the second auxiliary sensor line 76. A plurality may be formed in the.

As illustrated in FIG. 8, the touch panel 100 further includes a spacer 110 that maintains a cell gap between the first and second sensor electrodes 81 and 82.

The spacer 110 is formed on the first sensor electrode 81. In this case, the spacer 110 may be formed on the second sensor electrode 82.

The spacer 110 maintains a gap between the pressed regions when the first sensor electrodes 81 and the second sensor electrodes 82 are pressed by the user. The height of the spacer 110 is smaller than the gap formed by the first and second sensor electrodes 81 and 82. The spacer 110 is formed of a transparent and insulating material and uses an ultraviolet curable material or a heat curable material.

As shown in FIG. 9, when the pressure is applied to the third substrate 40, the spacer 110 may be bent by the first sensor electrode 81 and the first sensor electrode 81 formed on the first substrate 20 while the third substrate 40 is bent. The area where the second sensor electrodes 82 of the three substrates 40 abut each other is appropriately adjusted. In other words, the interval between the spacers 110 is preferably formed such that the first sensor electrode 81 and the second sensor electrode 82 abut each other when the user applies pressure to the third substrate 40. . In addition, the distance between the spacers 110 may be adjusted so that the area where the first sensor electrode 81 and the second sensor electrode 82 contact each other is not too wide.

10 is a cross-sectional view illustrating a display device according to a second exemplary embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along the line II ′ of FIG. 1, and has the same components except that the display panel is an organic light emitting display panel. Therefore, duplicate descriptions of the same components will be omitted.

In detail, the organic light emitting display panel 12 has first and second sensor lines 71 and 72 electrically connected to the first sensor electrode 81 and the first sensor electrode 81 to supply a reference voltage. ) Is formed, and includes a first substrate 20 encapsulating the second substrate 30, which will be described later, and a second substrate 30 on which the thin film transistor array 130 and the organic light emitting diode 150 are formed.

The thin film transistor array 130 supplies current to the organic light emitting diode 150 and the organic light emitting diode 150 formed for each pixel region formed by crossing the gate line and the gate line. It includes a power line. The thin film transistor array 130 includes a switching transistor for controlling the organic light emitting diode 150, a driving transistor, and a storage capacitor charging a data voltage supplied to the switching transistor.

The organic light emitting diode 150 is formed on the planarization layer 131 formed on the thin film transistor array 130. The organic light emitting diode 150 is formed between the anode electrode 152 connected to the power line, the cathode electrode 153 supplied with a voltage lower than the voltage supplied to the power line, and between the anode electrode 152 and the cathode electrode 153. An organic light emitting layer 151 for generating light is included. The organic light emitting layer 151 is inherent in the region provided as the partition wall 132.

The second substrate 30 includes the first and third contact electrodes 101 and 103 described with reference to FIG. 1. In addition, although not shown in FIG. 10, the second substrate 30 includes second and fourth contact electrodes.

In order to protect the second substrate 30 including the above-described components and the organic light emitting layer 151 formed on the second substrate 30 from moisture, the second substrate 30 is sealed with the first substrate 20. At this time, the sealing member 36 is sealed between the first substrate 20 and the second substrate 30.

The organic light emitting display panel 12 emits light toward the first substrate 20. For example, the first substrate 20 is formed of a glass substrate, a thin plastic substrate, or the like, which is a transparent material. In this case, a transparent absorbent may be further formed on the lower surface of the first substrate 20.

As described above, the first sensor electrode 81 and the first and second sensor lines 71 and 72 are formed on the first substrate 20.

The third substrate 40 is formed to face the first substrate 20, and has one side end of the second sensor electrode 82, the third sensor line 73, and the third sensor line 73 on a transparent substrate. And a seventh contact electrode 107 formed at one end of the fifth 105, the first auxiliary sensor line 75, and the first auxiliary sensor line 75. Although not shown in FIG. 10, the third substrate 40 may include a fourth sensor line connected to the second sensor electrode 82, a sixth contact electrode formed at one end of the fourth sensor line, and a second auxiliary sensor line. And an eighth contact electrode formed at one end of the second auxiliary sensor line.

The first and third substrates 20 and 40 are bonded by the adhesive 120 to form the touch panel 100. In this case, the first and third short points 61 electrically connecting the first and fifth contact electrodes 101 and 105 and the third and seventh contact electrodes 103 and 107 formed on the second substrate 30, respectively. , 63). In other words, the first short point 61 connects the first contact electrode 101 and the seventh contact electrode 107, and the third short point 63 connects the third contact electrode 103 and the fifth contact electrode. Connect 105. In this case, although the second and fourth short points are not shown in FIG. 7, similarly to the first and third short points 61 and 63, the second short points are the second contact electrode 102 and the eighth shown in FIG. 1. The contact electrode 108 is connected, and the fourth short point connects the third contact electrode 103 and the sixth contact electrode 106. The first to fourth short points 61 to 64 are formed of a conductive metal material such as gold and silver.

The upper surface of the first sensor electrode 81 further includes a spacer 110 for maintaining a cell gap between the first sensor electrode 81 and the second sensor electrode 82. An auxiliary short point 78 is formed between the first and second sensor lines 71 and 72 and the first and second auxiliary sensor lines 75 and 76 to form the first and second sensor lines 71 and 72. And the first and second auxiliary sensor lines 75 and 76 are electrically connected to each other.

The display device described with reference to FIGS. 1 to 10 detects the coordinates of the position where the touch is generated through the reference voltage supplied from the touch panel driver 250.

Specifically, the first sensor electrode 81 formed on the touch panel 100 has a constant potential formed at equal intervals by reference voltages of different potentials applied to the first and second sensor lines 71 and 72. Similarly to the first sensor electrode 81, the second sensor electrode 82 also has a constant potential formed at equal intervals by reference voltages of different potentials applied to the third and fourth sensor lines 73 and 74. .

When a touch is generated on any part of the touch panel 100, the reference voltage is supplied to the first and second sensor lines 71 and 72 when the X-axis coordinate is detected. The touch panel driver (not shown) supplies reference voltages of different potentials through the first and second short points 61 and 62. Subsequently, reference voltages applied to the first and second short points 61 and 62 are applied to the first and second auxiliary sensor lines 75 and 76 connected to the seventh and eighth contact electrodes 107 and 108. . The applied reference voltage is supplied to the first and second sensor lines 71 and 72 connected to the first and second auxiliary sensor lines 75 and 76 through the auxiliary short point 78. The potential of the touched point of the first sensor electrode 81 is set via the second sensor electrode 82 through the reference voltages supplied to the first and second sensor lines 71 and 72. The X-axis coordinates are detected by supplying the touch panel driver 250 through any one of lines 73 and 74. FIG.

The touch panel driver 250 supplies reference voltages having different potentials through the third and fourth contact electrodes 103 and 104 at a next time. The reference voltages applied through the third and fourth contact electrodes 103 and 104 are connected to the fifth and sixth contact electrodes 105 and 106 through the third and fourth short points 63 and 64. It is applied to the fourth sensor lines 73 and 74. Thereafter, the potential detected by the second sensor electrode 82 is transferred to the touch panel driver 250 through one of the first and second sensor lines 71 and 72 through the first sensor electrode 81. Y-axis coordinate is detected by supplying.

The touch panel driver 250 combines the detected coordinates, respectively, to finally calculate the coordinates at which the touch is made.

11 is a flowchart illustrating a manufacturing method of the display device illustrated in FIG. 1. Description of this will be described with reference to the same reference numerals for the same components in relation to Figures 1 to 10.

Referring to FIG. 11, in the method of manufacturing the display device according to the first exemplary embodiment, forming the first to fourth contact electrodes on the display panel (S10) and forming the first sensor electrode on the display panel is performed. (S20), forming first and second sensor lines (S30), forming first to fourth short points (S40), forming a second sensor electrode on a third substrate (S50), Forming the third and fourth sensor lines (S60), forming the eighth through eighth contact electrodes (S70), and bonding the first and third substrates (S80).

First, forming the first to fourth contact electrodes on the display panel (S10) forms the first to fourth contact electrodes 101 to 104 on the second substrate 30 of the display panel 10. In the display panel 10, the first substrate 20 and the second substrate 30 are bonded to each other by the seal line 35. The first to fourth contact electrodes 101 to 104 may be formed at the same time when the thin film transistor array of the second substrate 30 is formed. The first to fourth contact electrodes 101 to 104 have a lower end portion of the second substrate 30, that is, the second substrate 30 is moved to the outside after the bonding of the first substrate 20 and the second substrate 30. Form in the exposed area. In this case, the first and third contact electrodes 101 and 103 are formed on the left side of the second substrate 30, and the second and fourth contact electrodes 102 and 104 are formed on the right region of the second substrate 30. desirable.

Next, the forming of the first sensor electrode (S20) may include transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO) on the upper surface of the first substrate 20. The first sensor electrode 81 is formed of a material. The first sensor electrode 81 is formed on the first substrate 20 through printing, sputtering, or the like.

Next, in the forming of the first and second sensor lines (S30), the first and second sensor lines 71 and 72 may be electrically connected to the first sensor electrode 81 on the first substrate 20. Form. In this case, the first and second sensor lines 71 and 72 are formed at both sides of the first sensor electrode 81 in the Y-axis direction. Here, the first and second sensor lines 71 and 72 may be formed in the X-axis direction. The first and second sensor lines 71 and 72 are formed by printing, sputtering or the like. In this case, it is preferable that the first and second sensor lines 71 and 72 use a material having a small internal resistance such as gold, silver, and copper.

Here, the first connection electrode 85 may be further formed to connect the first sensor electrode 81 and the first and second sensor lines 71 and 72. For example, when the first and second sensor lines 71 and 72 are formed to float without being connected to both sides of the first sensor electrode 81, the first sensor electrode may be formed through the first connection electrode 85. Electrically connects 81 to first and second sensor lines 71 and 72. In this case, at least one first connection electrode 85 is formed between the first sensor electrode 81 and the first sensor line 71, and between the first sensor electrode 81 and the second sensor line 72. At least one is formed. The first connection electrode 85 uses a printing method or a sputtering method. The first connection electrode 85 may be formed of the same material as the first sensor electrode 81 or the first and second sensor lines 71 and 72, or may be formed of a conductive metal material. However, the first connection electrode 85 is preferably formed of the same metal material as any one of the first and second sensor lines 71 and 72 or the first sensor electrode 81 in consideration of contact resistance and the like. . In this case, the first connection electrode 85 may be simultaneously formed at the step of forming the first sensor electrode 81 or the step of forming the first and second sensor lines 71 and 72.

Next, in step S40 of forming the first to fourth short points, the first to fourth short points 61 to 64 are formed on the first to fourth contact electrodes 101 to 104, respectively. When the first to fourth short points 61 to 64 are formed, it is preferable to use metal having low internal resistance and high conductivity such as gold, silver, or a metal including the same.

In the forming of the first to fourth short points, the auxiliary short points 78 may be formed on the first and second sensor lines 71 and 72. The auxiliary short point 78 is preferably formed of the same metal material as the first to fourth short points 61 to 64.

Next, a third substrate is provided to form a touch panel on the display panel. At this time, a polarizing plate or a transparent thin film is used as a 3rd board | substrate. In order to form the touch panel on the third substrate, the display panel may be formed by a separate process from forming the display panel.

In detail, in operation S50 of forming the second sensor electrode on the third substrate, the second sensor electrode 82 is formed on the rear surface of the third substrate 40 to face the first sensor electrode 81. Like the first sensor electrode 81, the second sensor electrode 82 is a transparent conductive metal, for example, a transparent conductive metal such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO). Use The second sensor electrode 82 is formed in the same manner as the method of forming the first sensor electrode 81.

Next, in the forming of the third and fourth sensor lines (S60), the third and fourth sensor lines 73 and 74 are formed on both sides of the second sensor electrode 82. The third and fourth sensor lines 73 and 74 are formed on the rear surface of the third substrate 40 to be electrically connected to the second sensor electrode 82. In this case, the third and fourth sensor lines 73 and 74 are formed in the vertical direction, that is, the X axis direction, with the first and second sensor lines 71 and 72. Here, when the first and second sensor lines 71 and 72 are formed in the X-axis direction, the third and fourth sensor lines 73 and 74 are preferably formed in the Y-axis direction. The third and fourth sensor lines 73 and 74 are formed of the same metal as the first and second sensor lines 71 and 72. That is, the third and fourth sensor lines 73 and 74 may be formed of a metal material having a small internal resistance such as gold and silver copper.

Here, when the third and fourth sensor lines 73 and 74 are formed, the first and second auxiliary sensor lines 75 and 76 are formed. The first and second auxiliary sensor lines 75 and 76 may be formed to correspond to the first and second sensor lines 71 and 72. The first and second auxiliary sensor lines 75 and 76 are formed of the same metal material as the third and fourth sensor lines 73 and 74. The first and second auxiliary sensor lines 75 and 76 may be formed to be insulated from the third and fourth sensor lines 73 and 74.

In addition, a second connection electrode 86 connecting the second sensor electrode 82 and the third and fourth sensor lines 73 and 74 may be further formed. Since the second connection electrode 86 is formed in the same manner as the method of forming the first connection electrode 85, a detailed description thereof will be omitted.

Next, forming the fifth to eighth contact electrodes (S70) may include the fifth and sixth contact electrodes 105, which are formed at one end of the third and fourth sensor lines 73 and 74 on the rear surface of the third substrate. 106). The fifth and sixth contact electrodes 105 and 106 are preferably formed in the lower edge portion of the third substrate 40. In addition, since the fifth contact electrode 105 is formed at one end of the third sensor line 73, in order to connect the third sensor line 73 to the fifth contact electrode 105, the third substrate ( 40 is formed to extend the third sensor line 73 along the periphery.

When the fifth and sixth contact electrodes 105 and 106 are formed, the seventh and eighth contact electrodes 107 and 108 connected to one end of the first and second auxiliary sensor lines 75 and 76 are formed. . Here, the seventh and eighth contact electrodes 107 and 108 are formed to be insulated from the fifth and sixth contact electrodes 105 and 106. These fifth to eighth contact electrodes 105 to 108 are the same as the same metal material when forming the third and fourth sensor lines 73 and 74 and the first and second auxiliary sensor lines 75 and 76. It can form by a process.

Next, in the bonding step S80, an adhesive is formed on any one of the first and third substrates 20 and 40, the two substrates are aligned, and then bonded. Here, the adhesive 120 is preferably formed to overlap the region where the first to fourth sensor lines 74 are formed. Each of the first to fourth short points 61 to 64 electrically connects each of the first to fourth contact electrodes 101 to 104 and each of the fifth to eighth contact electrodes 105 to 108 through the bonding process. .

Meanwhile, the method may further include forming a spacer 110 on the first sensor electrode 81 or the second sensor electrode 82. That is, a spacer 110 formed of a transparent insulating material is formed to maintain a cell gap between the first sensor electrode 81 and the second sensor electrode 82.

12 is a perspective view illustrating a display device according to a third exemplary embodiment of the present invention, FIG. 13 is a plan view illustrating an upper portion of a display panel of the display device illustrated in FIG. 12, and FIG. 3 is a plan view showing a substrate.

12 to 14, the display device according to the third embodiment of the present invention is attached to the display panel 10, the touch panel 100 formed on the display panel 10, and the display panel 10. Flexible circuit film 50 to be included. Here, since the flexible circuit film 50 is the same as the flexible circuit film 50 illustrated in FIG. 1, the same description will be omitted.

Here, a ninth contact electrode 201 is formed on the second substrate 30 of the display panel 10 to apply a sensor signal detected by the touch panel 100 toward the second substrate 30. The ninth contact electrode 201 is formed in the lower left corner of the second substrate 30 as shown in FIG. 12. However, the ninth contact electrode 201 may be formed in the lower right corner corner region of the second substrate 30.

The touch panel 100 includes first and fourth sensor lines 71 to 74 connected to the first sensor electrode 81 and the first sensor electrode 81 formed on the first substrate 20 on the display panel 10, respectively. And a second sensor electrode 82 formed on the rear surface of the third substrate 40, and a fifth sensor line 220 electrically connected to the second sensor electrode 82. Here, the first and fourth short points 61 to 64 and the sensor signals from the fifth sensor line 220 for supplying a reference voltage to the first to fourth sensor lines 71 to 74 are connected to the flexible circuit film ( And a fifth short point 210 for supplying it to 50).

The first sensor electrode 81 is formed of a transparent conductive metal such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or the like. First to fourth sensor lines 71 to 74 are formed at the edge of the first sensor electrode 81.

The first to fourth sensor lines 71 to 74 are formed of a metal material having a low specific resistance such as gold and silver. The first to fourth sensor lines 71 to 74 are electrically connected to the first sensor electrode 81. Here, the first to fourth sensor lines 71 to 74 are formed in direct contact with the first sensor electrode 81 or electrically connected to each other through the first connection electrode 85. In this case, the first connection electrode 85 may be formed of the same material as any one of the first to fourth sensor lines 71 to 74 or the first sensor electrode 81.

The first and second sensor lines 71 and 72 are formed on both sides of the first sensor electrode 81 in the Y-axis direction, respectively.

The third and fourth sensor lines 73 and 74 are formed on both sides of the first sensor electrode 81 in the X axis direction. In addition, the third and fourth sensor lines 73 and 74 may be formed to contact the upper and lower sides of the first sensor electrode 81 or may be formed to be stacked on the upper and lower sides of the first sensor electrode 81. . In addition, the third and fourth sensor lines 73 and 74 may be electrically connected to each other through the first sensor electrode 81 and the second connection electrode 86.

In addition, the linearization pattern 230 may be further included on the first substrate 20 to be electrically connected to the first sensor electrode 81. As shown in FIG. 13, the linearization pattern 230 is preferably formed on the first sensor electrode 81 along the edge of the first sensor electrode 81.

In the linearization pattern 230, when a reference voltage is applied from the first sensor line 71 formed on the left side of the first sensor electrode 81, the applied reference voltage is equal to the entire left side of the first sensor electrode 81. To form. In addition, the linearization pattern 230 causes the reference voltage applied from the second sensor line 72 formed on the right side of the first sensor electrode 81 to form the same potential on the entire right side of the first sensor electrode 81. . Accordingly, when the reference voltage is supplied to the first and second sensor lines 71 and 72, the linearization pattern 230 may equalize the potentials of the points separated by the same distance from one side of the first sensor electrode 81. do.

In addition, the linearization pattern 230 is the same with respect to the reference voltage applied to the third and fourth sensor lines 73 and 74 with respect to one side of the upper and lower sides of the first sensor electrode 81 as described above. Make the potentials at distance equal to each other.

The second sensor electrode 82 is formed to face the first sensor electrode 81. The second sensor electrode 82 is preferably formed of a transparent conductive material.

The fifth sensor line 220 is formed to be electrically connected to the second sensor electrode 82. In particular, the fifth sensor line 220 may be formed in a closed curve along the edge of the second sensor electrode 82 and may be stacked on the upper surface of the edge of the second sensor electrode 82. The fifth sensor line 220 detects a sensor signal from the second sensor electrode 82.

The fifth to eighth contact electrodes 105 to 108 corresponding to the first to fourth contact electrodes 101 to 104 are further formed on the rear surface of the third substrate 40.

The fifth to eighth contact electrodes 105 to 108 may be formed of gold, silver, or a conductive material including the same, and may be divided in both corner regions of the third substrate 40. In this case, the fifth and seventh contact electrodes 105 and 107 are formed in the left corner region, and the sixth and eighth contact electrodes 106 and 108 are formed in the right corner region. However, the fifth and seventh contact electrodes 105 and 107 may be formed in the right corner region, and the sixth and eighth contact electrodes 106 and 108 may be formed in the left corner region. In addition, the fifth and sixth contact electrodes 105 and 106 may be formed in one corner region of the left and right sides, and the seventh and eighth contact electrodes 107 and 108 may be formed in the remaining corner region.

Here, the seventh contact electrode 107 is connected to the auxiliary sensor line 77 for supplying a reference voltage to the third sensor line 73. The auxiliary sensor line 77 is formed long along the left side of the second sensor electrode 82. The auxiliary sensor line 77 may be formed along the right side of the second sensor electrode 82.

The tenth contact electrode 202 is formed to be connected to the fifth sensor line 220. The tenth contact electrode 202 is formed on one side of both edge regions of the third substrate 40 and is formed to correspond to the ninth contact electrode 201 shown in FIG. 10. The tenth contact electrode 202 is preferably formed of the same metal material as the fifth sensor line 220.

The first to fourth short points 61 to 64 are the first to fourth contact electrodes 101 to 104 of the second substrate 30 and the fifth to eighth contact electrodes 105 to 104 of the third substrate 40. 108 is electrically connected. The fifth short point 210 electrically connects the ninth contact electrode 201 of the second substrate 30 and the tenth contact electrode 202 of the third substrate 40. Accordingly, the sensor signal from the fifth sensor line 210 is supplied to the flexible circuit film 50 through the second substrate 30. The first to fourth short points 61 to 64 are preferably formed of a conductive material including gold, silver, and the like.

In addition, the display device may include sixth to ninth short points for connecting the first to fourth sensor lines 71 to 74 formed on the first substrate 20 to the first to fourth contact electrodes 101 to 104. 211 to 214). The sixth short point 211 electrically connects the fifth contact electrode 105 and the first sensor line 71. The seventh short point 212 electrically connects the sixth contact electrode 106 and the second sensor line 72. The eighth short point 213 electrically connects one end 117 of the auxiliary sensor line 77 and the third sensor line 73. The ninth short point 214 electrically connects the eighth contact electrode 108 and the fourth sensor line 74.

The reference voltages applied to the third substrate 40 are supplied to the first to fourth sensor lines 71 to 74 through the sixth to ninth short points 211 to 214.

As illustrated in FIG. 12, the touch panel 100 includes a spacer 110 for maintaining a cell gap between the first sensor electrode 81 and the second sensor electrode 82.

The spacer 110 is formed on any one side of the first sensor electrode 81 or the second sensor electrode 82. The spacer 110 is preferably formed of a transparent insulating material.

Meanwhile, unlike FIG. 12, the positions of the first to fourth sensor lines 71 to 74 and the fifth sensor line 220 may be interchanged. In other words, the first to fourth sensor lines 71 to 74 may be formed on the third substrate 40, and the fifth sensor line 220 may be formed on the first substrate 20. In this case, the sixth to ninth short points 211 to 214 may not be used. However, when a touch is generated by the user, the third substrate 40 may be bent and cracks may be generated in the second sensor electrode 82, thereby decreasing sensitivity. Therefore, it is more preferable that the first to fourth sensor lines 71 to 74 are formed on the first substrate 20, and the fifth sensor line 220 is formed on the third substrate 40.

In the touch panel 100, when a touch is generated, the second sensor electrode 82 contacts the first sensor electrode 81. At this time, the external touch panel controller (not shown) recognizes the touches of the first and second sensor electrodes 81 and 82 and then applies a reference voltage for measuring the coordinates of the X-axis or the Y-axis to the first sensor electrode 81. ) Is applied. The reference voltage applied to the first sensor electrode 81 is a reference voltage to the third and fourth sensor lines 73 and 74 while the reference voltage applied to the first and second sensor lines 71 and 72 is applied. This is not authorized. In order to recognize the X-axis coordinates, a reference voltage is applied through the first and second sensor lines 71 and 72, and a potential is recognized by the second sensor electrode 82 at the touch point of the first sensor electrode 81. The driver transmits the driver for the touch panel through the fifth sensor line 220.

The method for recognizing the Y-axis coordinates is also the same as described above.

15 is a flowchart illustrating a method of manufacturing a display device according to a second embodiment of the present invention. Hereinafter, FIG. 15 will be described with reference to FIG. 12.

Referring to FIG. 15, in the method of manufacturing the display device according to the exemplary embodiment, forming the first to fourth contact electrodes and the ninth contact electrode on the second substrate (S110) and the first sensor on the first substrate Forming an electrode (S120), forming first to fourth sensor lines on the first substrate (S130), forming short points (S140), and forming a fifth sensor line on the third substrate (S150), forming a second sensor electrode on the third substrate (S160), forming a fifth to eighth contact electrode and a tenth contact electrode on the third substrate (S170), and the first substrate and the third Bonding the substrate (S180).

In detail, the forming of the first to fourth contact electrodes and the ninth contact electrodes on the display panel (S110) may include the first to fourth contact electrodes 101 to 104 on the second substrate 30 of the display panel 10. ) And a ninth contact electrode 201. The display panel 10 may be a liquid crystal panel or an organic light emitting panel. In this case, the first to fourth contact electrodes 101 to 104 may be formed in the step of forming the thin film transistor array of the second substrate 30 to reduce the process time and cost. The first to fourth contact electrodes 101 to 104 are formed at both corner regions not overlapping with the first substrate 20. When the first to fourth contact electrodes 101 to 104 are formed, the ninth contact electrode 201 is formed on either side of both edge regions of the second substrate 30 using the same process and the same material.

Next, in the step S110 of forming the first sensor electrode on the first substrate, the first sensor electrode is formed on the first substrate 20 through printing or screen printing. As the first sensor electrode 81, a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO) is used.

Next, the linearization pattern 230 may be further formed on the first sensor electrode 81. The linearization pattern 230 may be formed along the edge of the first sensor electrode 81.

Next, in the forming of the first to fourth sensor lines on the first substrate (S130), the first to fourth sensor lines may be electrically connected to the first sensor electrode 81 on the first substrate 20. 71 to 74). In this case, the first to fourth sensor lines 71 to 74 are formed by a printing method or a sputtering method. It is preferable that the first to fourth sensor lines 71 to 74 use a material having a small internal resistance such as gold, silver, and copper.

The first and second sensor lines 71 and 72 of the first to fourth sensor lines 71 to 74 are formed in the Y-axis direction of the first substrate 20, and the third and fourth sensor lines 73, 74 is formed in the X-axis direction. The method may further include forming first and second connection electrodes 85 and 86 for connecting with the first sensor electrode 81 when each of the first to fourth sensor lines 71 to 74 is floated. do.

The first and second connection electrodes 85 and 86 may be formed of the same material in the same process as the first sensor electrode 81 in the step in which the first sensor electrode 81 is formed, or the first to fourth sensor lines ( 71 to 74 may be formed of the same material in the same process as the first to fourth sensor lines 71 to 74 in the step of forming.

Next, in the forming of the first to ninth short points (S140), the first to fourth short points 61 to 64 are formed on the first to fourth contact electrodes 101 to 104, respectively, The fifth short point 210 is formed in the contact electrode 201. The sixth to ninth short points 211 to 214 are formed on each of the first to fourth sensor lines 71 to 74. The first to ninth short points 61, 62, 63, 64, 211, 212, 213, and 214 may be formed of gold, silver, or a conductive material containing them.

Next, a method of manufacturing the third substrate of the touch panel will be described.

In the forming of the second sensor electrode on the third substrate (S150), the second sensor electrode 82 is formed on the rear surface of the third substrate 40 so as to face the first sensor electrode 81. The second sensor electrode 82 is formed in the same manner as the first sensor electrode 81 by printing or sputtering, and may be formed of indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or the like. It is formed of a transparent conductive material.

Next, forming the fifth sensor line (S160) forms a fifth sensor line 220 connected to the second sensor electrode 82 on the back surface of the third substrate 40. The fifth sensor line 220 is formed of a metal material having low resistance such as gold, silver, copper, or the like by a printing or sputtering method. In this case, the fifth sensor line 220 is formed along the outer edge of the second sensor electrode 82. In this case, the method may further include forming a connection electrode electrically connecting the fifth sensor line 220 and the second sensor electrode 82.

Next, in the forming of the fifth to eighth contact electrodes and the tenth contact electrode (S170), the fifth to eighth contact electrodes 105 to 108 are formed on the rear surface of the third substrate 40. It is formed to correspond to the contact electrodes 101 to 104. In this case, one side end of each of the fifth to eighth contact electrodes 105 to 108 is formed symmetrically with the first to fourth contact electrodes 101 to 104. The other ends of the fifth, sixth, and eighth contact electrodes 105, 106, and 108 are formed to overlap the first, second, and fourth sensor lines 71, 72, and 74. In addition, an auxiliary sensor line 77 connected to the other end of the seventh contact electrode 107 is further formed. Here, the end of the auxiliary sensor line 77 is preferably formed to at least overlap the third sensor line (73).

The tenth contact electrode 202 is formed to be electrically connected to the fifth sensor line 220 and to correspond to the ninth contact electrode 201.

The fifth to eighth contact electrodes 105 to 108, the tenth contact electrode 202, and the auxiliary sensor line 77 are formed of a metal material having a low internal resistance such as gold or silver on the back surface of the third substrate 40. do. In this case, the fifth to eighth contact electrodes 104 to 108 are formed to float with each other, and the tenth contact electrode 202 is formed to be electrically connected to the fifth sensor line 220. The fifth to eighth contact electrodes 104 to 108 may be formed using a printing or sputtering method.

The fifth to eighth contact electrodes 104 to 108 and the tenth contact electrode 202 may be simultaneously formed in step S160 of forming the fifth sensor line.

Next, in the bonding step S180, an adhesive is formed on the edge of the first substrate 20, and the first substrate 20 and the third substrate 40 are aligned and bonded to complete the touch panel. In this case, each of the first to fourth short points 61 to 64 electrically connects one end of each of the first to fourth contact electrodes 101 to 104 and each of the fifth to eighth contact electrodes 105 to 108. do. Similarly, the fifth short point 210 electrically connects the ninth contact electrode 201 and the tenth contact electrode 202.

Here, the method may further include forming a spacer on any one of the first sensor electrode 81 and the second sensor electrode 82. In the forming of the spacer, a transparent insulating material is formed on the first sensor electrode 81 or the second sensor electrode 82 to maintain a cell gap between the first sensor electrode 81 and the second sensor electrode 82. . The forming of the spacer 110 may include forming a first sensor electrode (S120), forming a second sensor electrode 150, forming a first to fourth sensor line (S130), and 5 may be formed before or after any one of forming a sensor line (S160) and forming a first to ninth short point (S140).

As described above, the display device and the manufacturing method thereof according to the present invention can remove the touch panel circuit board by supplying a sensor signal supplied to the touch panel to the display panel circuit board. Accordingly, it is possible to reduce material costs and process costs.

In addition, since the circuit board for the touch panel is removed, a thin and light display device can be provided.

In the detailed description of the invention described above with reference to the preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge of the present invention described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the spirit and scope of the art.

Claims (22)

A display panel in which the first substrate and the second substrate face each other; A first sensor electrode formed on an upper surface of the first substrate; A third substrate formed at a predetermined distance from the first substrate; A second sensor electrode formed on a rear surface of the third substrate and connected to the first sensor electrode when the user touches it; A sensor line electrically connected to each of the first and second sensor electrodes; Contact electrodes formed on the second and third substrates; And And a short point formed between the contact electrodes on the second and third substrates to connect them. The method of claim 1, When the first and second sensor electrodes are connected, the display device further comprises a touch panel driver for inputting a coordinate signal for the connected point The method of claim 2, And the touch panel driver is mounted in a display panel driver for driving at least one of a gate line and a data line formed on the second substrate. The method of claim 3, wherein And a plurality of signal lines connecting the contact electrodes and the driver. The method of claim 2, The driver for the touch panel is mounted on a printed circuit board connected to the second substrate through a flexible circuit film. The method of claim 1, The third substrate is any one of an optical film, a polarizing plate and a glass substrate. The method of claim 1, And the short point is formed of a conductive metal material including at least one of gold and silver. The method of claim 1, The display device further comprises a spacer maintaining a cell gap between the first and second sensor electrodes. The method of claim 1, The sensor line is First and second sensor lines electrically connected to two opposite sides of the first sensor electrode, respectively; Third and fourth sensor lines electrically connected to the remaining side edges of the second sensor electrode on which the first and second sensor lines are not formed; And And first and second auxiliary sensor lines formed on a rear surface of the third substrate and electrically connected to the first and second sensor lines, respectively. The method of claim 9, The contact electrode formed on the second substrate includes first to fourth contact electrodes supplying a reference voltage to the first to fourth sensor lines. Fifth to eighth formed on the third substrate and connected to one end of the third and fourth sensor lines and the first and second auxiliary sensor lines, respectively; and corresponding to the first to fourth contact electrodes, respectively. A display device comprising a contact electrode. The method of claim 10, The short point is And first to fourth short points electrically connecting the first to fourth contact electrodes and the fifth to eighth contact electrodes, respectively. The method of claim 1, The sensor line is First to fourth sensor lines electrically connected to the first sensor electrodes of the first substrate; And And a fifth sensor line electrically connected to side edges of the second sensor electrode of the third substrate. The method of claim 12, First to fourth contact electrodes formed on the second substrate and supplying a reference voltage to the first to fourth sensor lines; Fifth to eighth contact electrodes formed on the third substrate and formed to correspond to the first to fourth contact electrodes; A ninth contact electrode formed on the second substrate to supply a sensor signal from the fifth sensor line to the outside; And And a tenth contact electrode connected to the fifth sensor line of the third substrate and formed to correspond to the ninth contact electrode. The method of claim 13, The short point is First to fourth short points electrically connecting the first to fourth contact electrodes and the fifth to eighth contact electrodes, respectively; And And a fifth short point formed between the ninth contact electrode and the tenth contact electrode to electrically connect them. The method of claim 14, And a sixth to ninth short point electrically connecting the fifth to eighth contact electrodes and the first to fourth sensor lines, respectively. The method of claim 12, And a linearization pattern formed at an edge of the first sensor electrode to form an equipotential of the first sensor electrode. Forming at least one contact electrode on a second substrate of the display panel in which the first substrate and the second substrate face each other; Forming a first sensor electrode on the first substrate; Forming a second sensor electrode on a rear surface of the third substrate facing the first substrate; Forming a sensor line electrically connected to the first and second sensor electrodes of the first and third substrates; Forming a contact electrode on the third substrate, the contact electrode corresponding to the contact electrode of the second substrate and electrically connected to the sensor line on the rear surface of the third substrate; And And forming a short point connecting the corresponding contact electrodes of the second and third substrates. The method of claim 17, Forming the sensor line Forming first and second sensor lines on two opposite sides of the first sensor electrode of the first substrate; Forming first and second auxiliary sensor lines corresponding to the first and second sensor lines on the third substrate; And And forming third and fourth sensor lines on the remaining sides of the second sensor electrode except the sides on which the first and second auxiliary sensor lines are formed. The method of claim 17, After forming the first and second sensor electrodes And forming a spacer to maintain a cell gap between the first and second sensor electrodes. The method of claim 17, Forming the sensor line Forming first to fourth sensor lines connected to the first sensor electrodes; And And forming a fifth sensor line connected to the second sensor electrode. The method of claim 20, In the forming of the fifth sensor line And the fifth sensor line is formed as one closed curve along the outer edge of the second sensor electrode. The method of claim 20, After forming the first sensor electrode And forming a linearization pattern for the equipotential of the first sensor electrode.

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