TW201426440A - Touch display panel and touch display device - Google Patents

Abstract

A touch display panel and a touch display device. The first transparent conductive layer, the insulating layer and the second transparent conductive layer are disposed on the same side of the color filter substrate, and the touch scan lines and the touch sensing lines are disposed on one side of the active device array substrate to increase the touch. The production yield of the display panel.

Description

Touch display panel and touch display device

The present invention relates to a touch display panel and a touch display device, and more particularly to a touch display panel and a touch display device that can improve yield.

At present, the design of the capacitive touch panel mainly includes the design of an indium tin oxide (ITO) layer on the glass and then bonding it to the tempered glass, which is called GG (Glass Glass), and also has indium tin oxide. The layer is made on a film made of polyethylene terephthalate (PET) and then bonded to a tempered glass, called GFF (Glass Film Film), but the above design will make touch And the thickness of the display module is thickened, the bonding process also increases the cost, and reduces the yield. The metal traces connected to the ITO at the periphery also increase the thickness of the border. To solve the above problem, a single piece of glass is developed. One Glass Solution (OGS) method, the indium tin oxide layer is made on a large piece of tempered glass, and then the cut glass is used, but the edge is not strengthened after the cutting, and the tempered glass used is used to strengthen the depth. Shallow, so the strength of a single piece of glass may not be sufficient for the product.

Therefore, the panel manufacturing end has developed an on-cell product, and the indium tin oxide layer is formed on the other side of the color filter, that is, the color resistance is required to be respectively formed on the front and back sides of the glass. Indium tin oxide layer, but because of the need to turn the glass over the process, it is not only easy to have the risk of electrostatic discharge (ESD), but also easy to create in the color resistive surface. Scratch, because the metal trace connecting the indium tin oxide layer is on the color filter, the flexible printed circuit (FPC) bonding space must be additionally designed on the color filter. Affects the size of the border.

Therefore, there is an in-cell development requirement that the indium tin oxide layer required for the touch panel is formed on the inner side of the color filter or the array glass substrate, and the indium tin oxide layer can be protected not only in the process. It is also possible to reserve a bonding pad on the side of the color filter.

The invention provides a touch display panel and a touch display device, which can improve product yield and display quality.

The invention provides a touch display panel comprising a color filter substrate, an active device array substrate, a first transparent conductive layer, an insulating layer and a second transparent conductive layer. The active device array substrate has a plurality of touch scan lines and a plurality of touch sensing lines. The first transparent conductive layer is disposed on the color filter substrate. The insulating layer is disposed on the first transparent conductive layer and has a plurality of first openings corresponding to the touch sensing lines. The second transparent conductive layer is disposed on the insulating layer, and has a plurality of second openings corresponding to the touch sensing lines. Each of the touch scan lines is electrically connected to the second transparent conductive layer, and each touch sensing line passes through the corresponding first opening. And electrically connecting to the first transparent conductive layer, wherein the first transparent conductive layer, the insulating layer and the second transparent conductive layer are located between the color filter substrate and the active device array substrate.

The present invention also provides a touch display device including the above touch Display panel, touch panel control unit, and switch unit. The touch panel control unit is coupled to the plurality of touch sensing lines, and transmits a plurality of touch scanning signals to the plurality of touch scanning lines, and receives a plurality of touch sensing signals from the plurality of touch sensing lines. The switch unit is coupled to the plurality of touch scan lines, the common voltage, and the touch panel control unit, and is controlled by a switching signal to switch the touch scan line to a common voltage during the display period, and the touch is controlled during the touch period. The scan line switch is connected to the touch panel control unit.

In an embodiment of the invention, the touch display device further includes a timing controller that provides a common voltage and controls timing of the scan line driving circuit and the data line driving circuit of the touch display device.

In an embodiment of the invention, the switching signal is output by the touch panel control unit or the timing controller.

In an embodiment of the invention, the touch panel control unit is disposed on one side of the color filter substrate or on the side of the active device array substrate.

In an embodiment of the invention, the active device array substrate comprises a pixel unit array, and the touch sensing line is located outside the array formed by the pixel unit.

In an embodiment of the invention, the touch display panel is a half source driving panel.

In one embodiment of the present invention, the touch display panel further includes a plurality of optical spacers disposed between the color filter substrate and the active device array substrate and covered by the second transparent conductive layer. The touch scan lines and the touch sense lines are electrically connected to the first transparent conductive layer and the second transparent conductive layer respectively by corresponding optical spacers.

In an embodiment of the invention, the first transparent conductive layer comprises a plurality of first strip electrode patterns, and the first strip electrode patterns are parallel to each other.

In an embodiment of the invention, the second transparent conductive layer includes a plurality of second strip electrode patterns, and the second strip electrode patterns are parallel to each other and the second strip electrode patterns are arranged in the first strip. The arrangement direction of the electrode patterns is substantially perpendicular.

Based on the above, the first transparent conductive layer, the insulating layer and the second transparent conductive layer required for touch detection are disposed on the same side of the color filter substrate, and the touch scan line and the touch sense are The measuring line is disposed on the side of the active device array substrate, wherein the touch sensing line can be electrically connected to the first transparent conductive layer through the insulating layer and the corresponding first opening and the second opening of the second transparent conductive layer, thereby increasing The production yield of the touch display panel.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1 is a schematic diagram of a touch display panel according to an embodiment of the invention. Please refer to FIG. 1 . The touch display panel 100 includes a color filter substrate 102, an active device array substrate 104, a first transparent conductive layer 106, an insulating layer 108, and a second transparent conductive layer 110. The color filter substrate 102 has red, green and blue (RGB) color resists thereon, and the first transparent conductive layer 106 and the second transparent conductive layer 110 may be, for example, an indium tin oxide layer. The first transparent conductive layer 106, the insulating layer 108, and the second transparent conductive layer 110 are located between the color filter substrate 102 and the active device array substrate 104, and are disposed in RGB. The same side of the color resistance. The first transparent conductive layer 106 is disposed on the color filter substrate 102. In this embodiment, the first transparent conductive layer 106 includes a plurality of first strip electrode patterns 106A, and the first strip electrode patterns 106A are parallel to each other. Arranged in order. The insulating layer 108 is disposed on the first transparent conductive layer 106, and the second transparent conductive layer 110 is disposed on the insulating layer 108. In this embodiment, the second transparent conductive layer 110 includes a plurality of second strip electrode patterns 110A. The second strip electrode patterns 110A are arranged in parallel with each other and arranged in a direction substantially perpendicular to the direction in which the first strip electrode patterns are arranged.

In addition, as shown in FIG. 2A, a schematic diagram of a touch display panel according to another embodiment of the present invention, the active device array substrate 104 includes a pixel unit array 202 formed by a plurality of pixel units, and a plurality of scanning lines G1 and a plurality of The data line S1, the plurality of touch scan lines Tx, and the plurality of touch sensing lines Rx. Each of the pixel units may include, for example, an active component (eg, a thin film transistor), a liquid crystal capacitor, and a storage capacitor. The scanning line G1 and the data line S1 are used to drive the pixel unit to display pixel data. In this embodiment, the touch display panel 100 is a half source driving panel (HSD), that is, two adjacent paintings. The prime unit shares a data line S1, thereby halving the number of data lines.

The touch scanning line Tx and the touch sensing line Rx of the embodiment can be disposed in the position of the originally reduced data line in the half source driving panel, that is, one piece can be disposed between two adjacent data lines S1. The touch sensing line Tx or the touch scanning line Rx can avoid the decrease of the aperture ratio and reduce the area of the peripheral border of the touch display panel 100. The touch sensing line Rx is electrically connected to the first transparent conductive layer 106, and the touch scan line Tx Then, it is electrically connected to the second transparent conductive layer 110.

FIG. 2B is a schematic cross-sectional view of the touch display panel 100. Referring to FIG. 2B , in detail, the touch display panel 100 may include a plurality of optical spacers 204 . For convenience of description, FIG. 2B only shows a part of the structure. The touch sensing line Rx and the first transparent conductive layer 106 and the touch scan line Tx and the second transparent conductive layer 110 can be electrically connected by the optical spacer 204. As shown in FIG. 2B, the insulating layer 108 has a first opening O1 corresponding to the touch sensing line Rx, and the second transparent conductive layer 110 also has a second opening O2 corresponding to the touch sensing line Rx. The optical spacer 204 is disposed in the color filter. The light sheet substrate 102 and the active device array substrate 104 are covered by the second transparent conductive layer 110. In this way, the touch sensing line Rx can be electrically connected to the first transparent conductive layer 106 via the first opening O1 and the second opening O2 by the corresponding optical spacer 204. On the other hand, the touch scan line Tx can also be electrically connected to the second transparent conductive layer 110 by the corresponding optical spacer 204.

Thus, by forming the touch sensing line Rx and the touch scanning line Tx on the active device array substrate 104 side, the touch sensing line Rx or the touch scanning line Tx can be improved on the color filter substrate 102. In the case where the yield is lowered, it is only necessary to increase the mask process of the two layers, such as the insulating layer 108 and the touch sensing line Rx, without the problem that the labor cost rises. In addition, there is no need to perform a bonding operation on the touch panel, and the display quality of the touch display panel 100 can be improved without adding a touch glass or a touch film.

It should be noted that in some embodiments, in order to prevent the signal on the touch sensing line Rx from being interfered by the signal near the pixel unit, the touch sense may also be The line Rx is disposed at the outer edge of the area of the pixel unit array 202. As shown in FIG. 3A, the touch display panel 300 of the present embodiment is different from the touch display panel 100 in that the touch sensing line Rx and the first transparent are different. The connection point of the conductive layer 106 is outside the range of the pixel unit array 202. Since the active device array substrate 104 can use the yellow light process to form the touch sensing line Rx, the frame area of the touch display panel 300 is not increased.

FIG. 3B is a schematic cross-sectional view of the touch display panel 300. Referring to FIG. 3B , the touch sensing line Rx of the present embodiment can be electrically connected to the first transparent conductive layer 106 via the first opening O1 and the second opening O2 by the optical spacer 204 corresponding thereto. At this time, the positions of the first opening O1 and the second opening O2 are located at the outer edge of the region of the pixel unit array 202, that is, the insulating layer 108 and the second transparent conductive layer 110 in the region of the pixel unit array 202 do not need to make an opening. The touch sensing line Rx is electrically connected. In addition, since the touch sensing line Rx has been pulled out of the area of the pixel unit array 202, the metal lines between the two adjacent data lines S1 are the touch scanning lines Tx.

FIG. 4 is a schematic diagram of a touch display device according to an embodiment of the invention. Referring to FIG. 4 , the touch display device 400 includes a touch display panel 402 , a touch panel control unit 404 , a switch unit 406 , and a timing controller 408 . The touch display panel 402 can be, for example, the touch display panels 100 and 200 mentioned in the above embodiments, and thus the structure thereof will not be described in detail herein. The touch panel control unit 404 is coupled to the touch sensing line Rx and the switch unit 406. The switch unit 406 is coupled to the timing controller 408 for outputting common The output of the voltage Vcom.

The touch panel control unit 404 is configured to transmit a plurality of touch scan signals St to the touch scan lines Tx, and receive a plurality of touch sensing signals Sr from the touch sensing lines Rx. The switch unit 406 is controlled by a switching signal SW1 to switch the touch scan line Tx to the common voltage Vcom or the touch panel control unit 404. The switching signal SW1 may be output by the touch panel control unit 404 or the timing controller 408. In addition, the timing controller 408 is also used to control the timing of the scan line driving circuit and the data line driving circuit of the touch display device 400.

In this embodiment, the second transparent conductive layer 110 on the side of the color filter substrate 102 must be used as a common electrode to provide a common voltage Vcom required for driving the liquid crystal, and also needs to transmit the touch scanning signal St. Therefore, the switch unit 406 is required to switch, wherein when the touch display panel 402 is in the display period, the switch unit 406 switches the touch scan line Tx to the common voltage Vcom, and when the touch display panel 402 is in the touch period, The switch unit 406 switches the touch scan line Tx to the touch panel control unit 404. Since the display frequency of the general display is 60 Hz to 120 Hz, and the frequency of the touch scanning signal St is 10 kHz to 50 kHz, the switching operation of the switch unit 406 does not significantly affect the display screen or the touch operation, and the touch is reduced. The quality of use of the display device.

In summary, the first transparent conductive layer, the insulating layer and the second transparent conductive layer required for touch detection are disposed on the same side of the color filter substrate, and the touch scan lines and touches are touched. The sensing line is disposed on one side of the active device array substrate, wherein the touch sensing line can be insulated and second The corresponding first opening and the second opening of the transparent conductive layer are electrically connected to the first transparent conductive layer, so that the manufacturing yield of the touch display panel can be increased. In addition, the touch display panel and the touch display device as taught in the above embodiments further include at least the following advantages:

1. Avoid a decrease in aperture ratio

2. Reduce the area of the peripheral border of the touch display panel

3. Avoid rising labor costs

4. No need to fit the touch panel, increase the touch glass or touch film, and improve the display quality of the touch display panel.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 300, 402‧‧‧ touch display panel

102‧‧‧Color filter substrate

104‧‧‧Active component array substrate

106‧‧‧First transparent conductive layer

108‧‧‧Insulation

110‧‧‧Second transparent conductive layer

106A‧‧‧First strip electrode pattern

110A‧‧‧Second strip electrode pattern

202‧‧‧ pixel element array

204‧‧‧Light spacers

400‧‧‧Touch display device

404‧‧‧Touch Panel Control Unit

406‧‧‧Switch unit

408‧‧‧ timing controller

G1‧‧‧ scan line

S1‧‧‧ data line

Tx‧‧‧ touch scan line

Rx‧‧‧ touch sensing line

O1‧‧‧ first opening

O2‧‧‧ second opening

Vcom‧‧‧Common voltage

St‧‧‧ touch scan signal

Sr‧‧‧ touch sensing signal

SW1‧‧‧Switch signal

FIG. 1 is a schematic diagram of a touch display panel according to an embodiment of the invention.

FIG. 2A is a schematic diagram of a touch display panel according to another embodiment of the present invention.

2B is a schematic cross-sectional view of the touch display panel.

FIG. 3A is a schematic diagram of a touch display panel according to another embodiment of the present invention.

FIG. 3B is a schematic cross-sectional view of the touch display panel.

FIG. 4 is a schematic diagram of a touch display device according to an embodiment of the invention.

100‧‧‧Touch display panel

102‧‧‧Color filter substrate

104‧‧‧Active component array substrate

106‧‧‧First transparent conductive layer

108‧‧‧Insulation

110‧‧‧Second transparent conductive layer

204‧‧‧Light spacers

O1‧‧‧ first opening

O2‧‧‧ second opening

Tx‧‧‧ touch scan line

Rx‧‧‧ touch sensing line

Claims (17)

A touch display panel includes: a color filter substrate; an active device array substrate having a plurality of touch scan lines and a plurality of touch sensing lines; and a first transparent conductive layer disposed on the color filter An insulating layer disposed on the first transparent conductive layer and having a plurality of first openings corresponding to the touch sensing lines; and a second transparent conductive layer disposed on the insulating layer, corresponding to the substrate Each of the touch sensing lines is electrically connected to the second transparent conductive layer, and each of the touch sensing lines passes through the corresponding first openings and the second openings. Electrically connecting to the first transparent conductive layer, wherein the first transparent conductive layer, the insulating layer and the second transparent conductive layer are located between the color filter substrate and the active device array substrate. The touch display panel of claim 1, wherein the active device array substrate comprises a pixel unit array, and the touch sensing lines are located outside the array formed by the pixel units. The touch display panel of claim 1, wherein a touch sensing line or a touch scan line is disposed between adjacent data lines of the touch display panel. The touch display panel of claim 1, wherein the touch display panel is a half source driving panel. The touch display panel as described in claim 1 further includes: a plurality of optical spacers disposed between the color filter substrate and the active device array substrate and covered by the second transparent conductive layer, wherein the touch scan lines and the touch sensing lines are respectively Corresponding optical spacers are electrically connected to the first transparent conductive layer and the second transparent conductive layer. The touch display panel of claim 1, wherein the first transparent conductive layer comprises a plurality of first strip electrode patterns, and the first strip electrode patterns are parallel to each other. The touch display panel of claim 2, wherein the second transparent conductive layer comprises a plurality of second strip electrode patterns, the second strip electrode patterns are parallel to each other and the second strip electrodes are The arrangement direction of the patterns is substantially perpendicular to the arrangement direction of the first strip electrode patterns. A touch display device includes: a touch display panel comprising: a color filter substrate; an active device array substrate having a plurality of touch scan lines and a plurality of touch sensing lines; and a first transparent conductive layer And disposed on the color filter substrate; an insulating layer disposed on the first transparent conductive layer, having a plurality of first openings corresponding to the touch sensing lines; and a second transparent conductive layer disposed on the The plurality of second openings corresponding to the touch sensing lines are electrically connected to the second transparent conductive layer, and each of the touch sensing lines is corresponding to the first The opening and the second openings are electrically connected to the first transparent conductive a layer, wherein the first transparent conductive layer, the insulating layer and the second transparent conductive layer are located between the color filter substrate and the active device array substrate; and a touch panel control unit coupled to the touch sense a plurality of touch scan signals are transmitted to the touch scan lines, and a plurality of touch sensing signals are received from the touch sensing lines; and a switch unit coupled to the touch scan lines and a common The voltage and the touch panel control unit are controlled by a switching signal to switch the touch scan lines to the common voltage during a display period, and switch the touch scan lines to a touch period during a touch period. The touch panel control unit. The touch display device of claim 8, further comprising: a timing controller that provides the common voltage and controls timing of the scan line driving circuit and the data line driving circuit of the touch display device. The touch display device of claim 9, wherein the switching signal is output by the touch panel control unit or the timing controller. The touch panel display unit of the invention, wherein the touch panel control unit is disposed on one side of the color filter substrate or on the side of the active device array substrate. The touch display device of claim 8, wherein the active device array substrate comprises a pixel unit array, and the touch sensing lines are located outside the array formed by the pixel units. The touch display device of claim 8, wherein a touch sensing line is disposed between adjacent data lines of the touch display panel Or a touch scan line. The touch display device of claim 8, wherein the touch display panel is a half source drive panel. The touch display device of claim 8, further comprising: a plurality of optical spacers disposed between the color filter substrate and the active device array substrate, and being disposed by the second transparent conductive layer The second transparent conductive layer is electrically connected to the first transparent conductive layer and the second transparent conductive layer respectively by the corresponding second transparent conductive layer on the corresponding optical spacers. . The touch display device of claim 8, wherein the first transparent conductive layer comprises a plurality of first strip electrode patterns, and the first strip electrode patterns are parallel to each other. The touch display device of claim 15, wherein the second transparent conductive layer comprises a plurality of second strip electrode patterns, the second strip electrode patterns are parallel to each other and the second strip electrodes are The arrangement direction of the patterns is substantially perpendicular to the arrangement direction of the first strip electrode patterns.