Touch display device

Abstract

The invention discloses a touch display device. A touch layer is arranged on one side, adjacent to a light-emitting unit, of a driving circuit layer; the driving circuit layer comprises a plurality of first transistors, and the touch layer comprises a plurality of second transistors; wherein the second transistor is used for detecting a touch light signal emitted by the touch light pen and converting the touch light signal into light current, and the second transistor is located between the adjacent light emitting units; and the vertical projection of the second transistor on the driving circuit layer is overlapped with at least one first transistor. The aperture ratio of the touch display device can be improved.

Description

Technical Field

[0001] The present invention relates to the field of touch control technology, and in particular to a touch control display device. Background Art

[0002] Interactive electronic whiteboards have attracted much attention because they can be used in education, business, office, military and other fields. According to the technical principle, interactive electronic whiteboards can be divided into four types: pressure-sensitive electronic whiteboards, electromagnetic electronic whiteboards, infrared electronic whiteboards and optical electronic whiteboards. Among them, optical electronic whiteboards have attracted much attention because they are not affected by strong light in front of the screen, have high touch accuracy, and have smooth writing.

[0003] Optical electronic whiteboards use light pen touch technology to achieve near-end writing and far-end remote control. Light pen touch technology is a new technology different from existing infrared, electromagnetic waves, resistors, capacitors, etc. It uses advanced TFT-based photoelectric conversion technology to obtain and identify the position of the light pen on the screen and convert the physical coordinates of the light pen on the screen into logical coordinates and control instructions of the computer screen through a specific algorithm, so as to realize control functions such as touch annotation of the light pen on the screen and achieve natural human-computer interaction. The principle of this technology is to add a photosensitive TFT array on the basis of the original display array, and completely concentrate the photosensitive TFT on the panel. Using the sensitivity of the photosensitive TFT to light, when the light of the light pen hits the display screen, the photosensitive array outputs different photoelectric signals, so that the IC can recognize, convert, and judge, and finally form an image command. In terms of response speed and touch accuracy, light pen touch technology is superior to other touch technologies. However, the existing touch display devices using light pen touch technology have the problem of low aperture ratio. Summary of the invention

[0004] The present invention provides a touch display device to improve the aperture ratio of the touch display device.

[0005] According to one aspect of the present invention, there is provided a touch display device, comprising:

[0006] An array substrate and a plurality of light emitting units arranged on one side of the array substrate;

[0007] The array substrate comprises a substrate, and a driving circuit layer and a touch layer arranged on a side of the substrate adjacent to the light-emitting unit, wherein the touch layer is arranged on a side of the driving circuit layer adjacent to the light-emitting unit;

[0008] The driving circuit layer includes a plurality of first transistors, and the touch layer includes a plurality of second transistors; wherein the second transistors are used to detect touch light signals emitted by the touch light pen and convert the touch light signals into photocurrents, and the second transistors are located between adjacent light emitting units;

[0009] A vertical projection of the second transistor on the driving circuit layer overlaps with at least one of the first transistors.

[0010] Optionally, the second transistor includes a first gate layer, a first active layer and a first source-drain layer; the first gate layer is arranged on a side of the first active layer adjacent to the substrate, and the first source-drain layer is arranged on a side of the first active layer away from the substrate.

[0011] Optionally, the channel width of the first active layer is greater than or equal to 4 microns and less than or equal to 6 microns.

[0012] Optionally, the first active layer includes a channel region, a source region, a drain region and an edge region;

[0013] The channel region is located between the source region and the drain region; the first source-drain electrode layer includes a source electrode and a drain electrode, the source electrode is located in the source region, and the drain electrode is located in the drain region;

[0014] The edge region is located at a side of the drain region away from the source region, and / or the edge region is located at a side of the source region away from the drain region;

[0015] The width of the edge region is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers.

[0016] Optionally, the drain region surrounds a portion of the edge of the source region, and / or the drain region is U-shaped or arc-shaped.

[0017] Optionally, the material used for the first gate layer is a light-shielding conductive material, and the material used for the first source and drain layer is a light-transmitting conductive material.

[0018] Optionally, the material used for the first gate layer includes at least one of Al and Mo;

[0019] The material used for the first source-drain electrode layer includes light-transmitting metal oxide.

[0020] Optionally, along a thickness direction of the touch layer, the first active layer is undulating.

[0021] Optionally, a plurality of the second transistors are arranged in an array, and adjacent second transistors are separated by a plurality of light-emitting units.

[0022] Optionally, the first transistor includes a second gate layer, a second active layer and a second source-drain layer; the second gate layer is arranged on a side of the second active layer adjacent to the substrate, and the second source-drain layer is arranged on a side of the second active layer away from the substrate;

[0023] The second gate layer is made of the same material as the first gate layer; the second source and drain layer is made of a light-shielding conductive material;

[0024] The touch display device further includes:

[0025] Touch scan line and touch output line;

[0026] The touch scan line is electrically connected to the first gate layer, the first source-drain layer includes a source electrode and a drain electrode, and the touch output line is electrically connected to the source electrode;

[0027] The touch scan line is disposed in the same layer as the first gate layer, and the touch output line is disposed in the same layer as the first source and drain layer;

[0028] The light emitting unit is an organic light emitting unit or a liquid crystal light emitting unit.

[0029] In the touch display device of the embodiment of the present invention, the array substrate includes a substrate, a driving circuit layer and a touch layer arranged on a side of the substrate adjacent to the light-emitting unit, the touch layer is arranged on a side of the driving circuit layer adjacent to the light-emitting unit; the driving circuit layer includes a plurality of first transistors, the touch layer includes a plurality of second transistors; the second transistors are located between adjacent light-emitting units; the vertical projection of the second transistor on the driving circuit layer overlaps with at least one first transistor. By arranging the touch layer to be located on a side of the driving circuit layer adjacent to the light-emitting unit, the second transistors are located between adjacent light-emitting units, and the second transistors and the first transistors are arranged independently, the positions of the second transistors and the first transistors can be arranged more freely, the area of ​​the non-display area can be reduced, and the aperture ratio of the touch display device can be increased, and the second transistor can shield the light for the first transistor, thereby reducing the reliability problems of the first transistor such as afterimage and low-frequency crosstalk caused by light leakage.

[0030] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a cross-sectional view of a touch display device provided by an embodiment of the present invention;

[0033] Figure 2 yes Figure 1 A partial enlarged view of

[0034] Figure 3 is a top view of a second transistor;

[0035] Figure 4 is a partial enlarged view of another touch display device provided by an embodiment of the present invention;

[0036] Figure 5 is a partial enlarged view of another touch display device provided by an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the arrangement of the second transistor. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] An embodiment of the present invention provides a touch display device, Figure 1 is a cross-sectional view of a touch display device provided by an embodiment of the present invention, Figure 2 yes Figure 1 A partial enlarged view of Figure 2 yes Figure 1 An enlarged view of the structure in the dashed box 100. Figure 1 and Figure 2 , the touch display device comprises:

[0041] An array substrate 10 and a plurality of light emitting units 20 disposed on one side of the array substrate 10;

[0042] The array substrate 10 includes a substrate 11, and a driving circuit layer 12 and a touch layer 13 disposed on a side of the substrate 11 adjacent to the light emitting unit 20. The touch layer 13 is disposed on a side of the driving circuit layer 12 adjacent to the light emitting unit 20.

[0043] The driving circuit layer 12 includes a plurality of first transistors 121, and the touch layer 13 includes a plurality of second transistors 131; wherein the second transistors 131 are used to detect the touch light signal emitted by the touch light pen and convert the touch light signal into a photocurrent, and the second transistors 131 are located between adjacent light emitting units 20;

[0044] A vertical projection of the second transistor 131 on the driving circuit layer 12 overlaps with at least one first transistor 121 .

[0045] Specifically, the vertical projection of the second transistor 131 on the driving circuit layer 12 may overlap with one, two or more first transistors 121. This arrangement enables the second transistor 131 to better shield light and prevent light from irradiating the first transistor 121.

[0046] The substrate 11 may be a flexible substrate or a rigid substrate, and the material of the substrate 11 may be glass or polyimide. The driving circuit layer 12 is used to send a driving signal to the light-emitting unit 20 to drive the light-emitting unit 20 to emit light. The driving circuit layer 12 may include a plurality of driving circuits, each of which is electrically connected to a light-emitting unit 20, and each of which is used to send a driving signal to its corresponding light-emitting unit 20. The driving circuit may include one, two or more first transistors 121. The material used for the first active layer 33 may be a-si.

[0047] The touch layer 13 is used to identify the touch operation of the stylus light pen. After the touch light signal emitted by the stylus light pen is irradiated to the second transistor 131, the second transistor 131 converts the light signal into a current and outputs a photocurrent signal, and the touch position of the stylus light pen can be determined according to the photocurrent signal. Exemplarily, a plurality of second transistors 131 can be arranged in an array, and the touch position of the stylus light pen can be determined by detecting the photocurrent output by each second transistor 131. The first source-drain electrode layer 34 can include a source electrode and a drain electrode.

[0048] The related art sets the first transistor 121 and the second transistor 131 on the same layer. In order to ensure the working performance requirements of the first transistor 121 and the second transistor 131, it is difficult to arrange the first transistor 121 and the second transistor 131, so that the touch display device has a larger non-display area, which affects the aperture ratio of the touch display device. In this embodiment, by setting the touch layer 13 to be located on the side of the driving circuit layer 12 adjacent to the light-emitting unit 20, the second transistor 131 and the first transistor 121 are independently arranged, and the position setting of the second transistor 131 and the first transistor 121 can be more free, which can reduce the area of ​​the non-display area and improve the aperture ratio of the touch display device. In addition, the second transistor 131 is located between adjacent light-emitting units 20, and the second transistor 131 has a larger photosensitive area. The second transistor 131 can block light for the first transistor 121, reducing the reliability problems such as afterimage and low-frequency crosstalk caused by light leakage of the first transistor 121.

[0049] On the other hand, the second transistor 131 includes a first gate layer 31 , a first active layer 33 and a first source-drain layer 34 ; the first gate layer 31 is disposed on a side of the first active layer 33 adjacent to the substrate 11 , and the first source-drain layer 34 is disposed on a side of the first active layer 33 away from the substrate 11 .

[0050] In the touch display device of the embodiment of the present invention, the array substrate 10 includes a substrate 11 and a driving circuit layer 12 and a touch layer 13 arranged on a side of the substrate 11 adjacent to the light-emitting unit 20, and the touch layer 13 is arranged on a side of the driving circuit layer 12 adjacent to the light-emitting unit 20; the driving circuit layer 12 includes a plurality of first transistors 121, and the touch layer 13 includes a plurality of second transistors 131; the second transistors 131 are located between adjacent light-emitting units 20; the second transistors 131 include a first gate layer 31, a first active layer 33 and a first source-drain layer 34; the first gate layer 31 is arranged on a side of the first active layer 33 adjacent to the substrate 11, and the first source-drain layer 34 is arranged on a side of the first active layer 33 away from the substrate 11. By arranging the touch layer 13 to be located on the side of the driving circuit layer 12 adjacent to the light-emitting unit 20, the second transistor 131 is located between the adjacent light-emitting units 20, and the second transistor 131 and the first transistor 121 are independently arranged, the positions of the second transistor 131 and the first transistor 121 can be arranged more freely, the area of ​​the non-display area can be reduced, and the aperture ratio of the touch display device can be improved. The second transistor 131 can block light for the first transistor 121, thereby reducing reliability issues such as afterimages and low-frequency crosstalk caused by light leakage of the first transistor 121.

[0051] On the basis of the above embodiment, the material used for the first gate layer 31 is a light-shielding conductive material, and the material used for the first source-drain electrode layer 34 is a light-transmitting conductive material.

[0052] The light-transmitting conductive material may include a light-transmitting metal oxide or a light-transmitting metal, etc. For example, the light-transmitting metal oxide may be indium tin oxide, etc. The material used in the first source-drain electrode layer 34 is a light-transmitting conductive material, so that the second transistor 131 has a larger photosensitive area and a larger photocurrent, thereby improving the photosensitivity of the second transistor 131, and the material used in the first gate layer 31 is a light-shielding conductive material, so that the first gate layer 31 can shield the light for the first transistor 121, thereby reducing the reliability problems such as afterimage and low-frequency crosstalk caused by light leakage of the first transistor 121.

[0053] Figure 3 is a top view of a second transistor, Figure 2 yes Figure 3 The cross-sectional view of the second transistor along the section line AA, refer to Figure 2 and Figure 3 , based on the above embodiment, optionally, the channel width D1 of the first active layer 33 is greater than or equal to 4 microns and less than or equal to 6 microns.

[0054] Specifically, if the channel width D1 is too long, the photocurrent will decrease. If the channel width D1 is too small, the photosensitive area of ​​the second transistor 131 will decrease, which will also cause the photocurrent to decrease. By setting the channel width D1 to be greater than or equal to 4 microns and less than or equal to 6 microns, the photosensitivity of the second transistor 131 is optimized, the photocurrent is larger, and the photosensitivity is higher. Exemplarily, the channel width D1 of the first active layer 33 can be 4 microns, 4.5 microns, 5 microns, 5.5 microns or 6 microns, etc.

[0055] Figure 4 is a partial enlarged diagram of another touch display device provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 3 and Figure 4 , the first active layer 33 includes a channel region 331 , a source region 332 , a drain region 333 edge region 334 ;

[0056] The channel region 331 is located between the source region 332 and the drain region 333 ; the first source-drain electrode layer includes a source electrode 341 and a drain electrode 342 , the source electrode 341 is located in the source region 332 , and the drain electrode 342 is located in the drain region 333 ;

[0057] The edge region 334 is located on a side of the drain region 333 away from the source region 332 , and / or the edge region 334 is located on a side of the source region 332 away from the drain region 333 ;

[0058] The width D2 of the edge region 334 is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers.

[0059] Specifically, refer to Figure 3, the source electrode 341 covers the source region 332, and the drain electrode 342 covers the drain region 333. The source region 332 and the drain region 333 are arranged opposite to each other, and the area between the source region 332 and the drain region 333 is the channel region 331. Only the side of the drain region 333 away from the source region 332 may have the edge region 334, or only the side of the source region 332 away from the drain region 333 may have the edge region 334, or both the side of the drain region 333 away from the source region 332 and the side of the source region 332 away from the drain region 333 may have the edge region 334. By setting the width D2 of the edge region 331 to be greater than or equal to 1.5 microns and less than or equal to 2.5 microns, the photosensitivity area of ​​the second transistor can be increased, the photocurrent can be increased, the photosensitivity can be further improved, and the touch sensitivity can be improved.

[0060] On the basis of the above embodiment, optionally, the drain region 333 surrounds a portion of the edge of the source region 332 .

[0061] This arrangement ensures that the second transistor 131 has a smaller size while allowing the channel region 331 to have a larger area, thereby ensuring that the second transistor 131 has a larger photosensitivity area, increasing the photocurrent, further improving photosensitivity, and enhancing touch sensitivity.

[0062] Based on the above embodiment, optionally, the drain region 333 has a U-shape or an arc shape.

[0063] Specifically, the U-shaped and arc-shaped drain region 333 are easier to manufacture, and setting the drain region 333 to be U-shaped or arc-shaped can reduce the difficulty of the manufacturing process.

[0064] On the basis of the above embodiment, optionally, the material used for the first gate layer 31 includes Al and Mo; the material used for the first source and drain layer 34 includes a light-transmitting metal oxide.

[0065] Specifically, the first gate layer 31 can adopt an Al / Mo stacked structure. Both Al and Mo have good conductivity and good light-shielding effect. The first gate layer 31 adopts Al and Mo, which ensures that the first gate layer 31 has good conductivity and the conduction performance of the second transistor 131, while ensuring that the first gate layer 31 can better shield light.

[0066] Figure 5 is a partial enlarged diagram of another touch display device provided by an embodiment of the present invention. Figure 5 Optionally, along the thickness direction of the touch layer 13 , the first active layer 33 is undulating.

[0067] Exemplarily, along the thickness direction of the touch layer 13, the cross-sectional shape of the first active layer 33 is wavy, zigzag, or other shapes with ups and downs. The first active layer 33 is arranged to have ups and downs, so that the first active layer 33 has a larger area, the second transistor 131 has a larger photosensitive area, and the photosensitivity of the second transistor 131 is further improved.

[0068] Figure 6 is a schematic diagram of the arrangement of the second transistor, based on the above embodiment, referring to Figure 6 Optionally, a plurality of second transistors 131 are arranged in an array, and adjacent second transistors 131 are separated by a plurality of light-emitting units.

[0069] This arrangement can reduce the structural complexity of the touch layer and the driving difficulty while ensuring the touch accuracy. For example, a second transistor can be placed every 4 rows and 12 columns of light-emitting units, that is, there are 4 light-emitting units between two adjacent second transistors 131 in the column direction, and there are 12 light-emitting units between two adjacent second transistors 131 in the row direction.

[0070] On the basis of the above embodiment, optionally, the first transistor 121 includes a second gate layer 41, a second active layer 43 and a second source-drain layer 44; the second gate layer 41 is arranged on a side of the second active layer 43 adjacent to the substrate 11, and the second source-drain layer 44 is arranged on a side of the second active layer 43 away from the substrate 11;

[0071] The second gate layer 41 and the first gate layer 31 are made of the same material; the second source-drain electrode layer 44 is made of a light-shielding conductive material.

[0072] Specifically, the driving circuit layer 12 further includes a second gate insulating layer 42, the touch layer 13 further includes a first gate insulating layer 32, a first insulating layer 45 is further included between the touch layer 13 and the driving circuit layer 12, and a second insulating layer 35 is further included between the touch layer 13 and the light-emitting unit 20. The first gate insulating layer 32 is arranged between the first gate layer 31 and the first active layer 32, and the second gate insulating layer 42 is arranged between the second gate layer 41 and the second active layer 43. The second gate layer 41 and the first gate layer 31 are made of the same material, so that the second gate layer 41 and the first gate layer 31 can be prepared by the same process, reducing the process cost. The second source and drain layer 44 is made of a light-shielding conductive material, so that the second source and drain layer 44 can block the light entering the second active layer 43, further reducing the reliability problems such as afterimage and low-frequency crosstalk caused by light leakage of the first transistor 121. Exemplarily, the second source and drain layer 44 can adopt a Mo / Al / Mo structure.

[0073] Based on the above embodiment, optionally, refer to Figure 3-Figure 6 , the touch display device further comprises:

[0074] Touch scanning line 50 and touch output line 60;

[0075] The touch scan line 50 is electrically connected to the first gate layer 32 , the first source-drain layer 34 includes a source electrode 341 and a drain electrode 342 , and the touch output line 60 is electrically connected to the source electrode 341 ;

[0076] The touch scan line 50 is disposed in the same layer as the first gate layer 32 , and the touch output line 60 is disposed in the same layer as the first source-drain layer 44 .

[0077] Among them, the touch scan line 50 is used to transmit a scan signal to the first gate layer 32 to turn on the corresponding second transistor 131, and the touch output line 60 is used to output a photocurrent signal. The irradiation position of the touch light pen and the touch position can be determined by detecting the photocurrent signal output by each second transistor 131. The touch display panel also includes a drain signal line 70, which is connected to the drain 342 and connected to a fixed potential.

[0078] Based on the above embodiment, optionally, the light-emitting unit is an organic light-emitting unit or a liquid crystal light-emitting unit.

[0079] Specifically, when the light-emitting unit is an organic light-emitting unit, the light-emitting unit may include a first electrode, a second electrode and an organic light-emitting layer disposed between the first electrode and the second electrode. When the light-emitting unit is a liquid crystal light-emitting unit, the light-emitting unit includes a pixel electrode, a common electrode and a liquid crystal layer.

[0080] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0081] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch display device, characterized in that: include: An array substrate and a plurality of light emitting units arranged on one side of the array substrate; The array substrate comprises a substrate, and a driving circuit layer and a touch layer arranged on a side of the substrate adjacent to the light-emitting unit, wherein the touch layer is arranged on a side of the driving circuit layer adjacent to the light-emitting unit; The driving circuit layer includes a plurality of first transistors, and the touch layer includes a plurality of second transistors; wherein the second transistors are used to detect touch light signals emitted by the touch light pen and convert the touch light signals into photocurrents, and the second transistors are located between adjacent light emitting units; A vertical projection of the second transistor on the driving circuit layer overlaps with at least one of the first transistors.

2. The touch display device according to claim 1, characterized in that: The second transistor includes a first gate layer, a first active layer and a first source-drain layer; the first gate layer is arranged on a side of the first active layer adjacent to the substrate, and the first source-drain layer is arranged on a side of the first active layer away from the substrate.

3. The touch display device according to claim 2, characterized in that: The channel width of the first active layer is greater than or equal to 4 micrometers and less than or equal to 6 micrometers.

4. The touch display device according to claim 2, characterized in that: The first active layer includes a channel region, a source region, a drain region and an edge region; The channel region is located between the source region and the drain region; the first source-drain electrode layer includes a source electrode and a drain electrode, the source electrode is located in the source region, and the drain electrode is located in the drain region; The edge region is located at a side of the drain region away from the source region, and / or the edge region is located at a side of the source region away from the drain region; The width of the edge region is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers.

5. The touch display device according to claim 4, characterized in that: The drain region surrounds a portion of the edge of the source region, and / or the drain region is in a U-shape or an arc shape.

6. The touch display device according to claim 2, characterized in that: The material used for the first gate layer is a light-shielding conductive material, and the material used for the first source and drain layer is a light-transmitting conductive material.

7. The touch display device according to claim 2, characterized in that: The material used for the first gate layer includes at least one of Al and Mo; The material used for the first source-drain electrode layer includes light-transmitting metal oxide.

8. The touch display device according to claim 2, wherein: The first active layer has undulating heights along the thickness direction of the touch layer.

9. The touch display device according to claim 1, characterized in that: A plurality of the second transistors are arranged in an array, and adjacent second transistors are separated by a plurality of light emitting units.

10. The touch display device according to claim 2, characterized in that: The first transistor comprises a second gate layer, a second active layer and a second source-drain layer; the second gate layer is arranged on a side of the second active layer adjacent to the substrate, and the second source-drain layer is arranged on a side of the second active layer away from the substrate; The second gate layer is made of the same material as the first gate layer; the second source and drain layer is made of a light-shielding conductive material; The touch display device further includes: Touch scan line and touch output line; The touch scan line is electrically connected to the first gate layer, the first source-drain layer includes a source electrode and a drain electrode, and the touch output line is electrically connected to the source electrode; The touch scan line is disposed in the same layer as the first gate layer, and the touch output line is disposed in the same layer as the first source and drain layer; The light emitting unit is an organic light emitting unit or a liquid crystal light emitting unit.

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