WO2019153356A1

WO2019153356A1 - Touch-control display panel and touch-control display device

Info

Publication number: WO2019153356A1
Application number: PCT/CN2018/076554
Authority: WO
Inventors: 张琨; 苏伟盛; 林源城
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-02-12
Filing date: 2018-02-12
Publication date: 2019-08-15
Also published as: CN111801643A

Abstract

The present invention relates to a touch-control display panel, comprising a first flexible substrate, a touch sensing layer and a display layer which are sequentially arranged in a stacked manner. The touch sensing layer is arranged on a surface of the first flexible substrate. The display layer comprises a first surface and a second surface which are arranged opposite each other, wherein the first surface is attached to a surface of the touch sensing layer; the display layer emits light and the light is emitted from a second surface so as to display an image; the second surface is also used to receive a touch operation; and the touch sensing layer is used to sense the touch operation. Further disclosed is a touch-control display device comprising the touch-control display panel.

Description

Touch display panel and touch display device

Technical field

The present invention relates to a touch display technology, and in particular to a touch display panel and a touch display device with high display quality.

Background technique

With the wide application of intelligent electronic products, flexible touch display technology has also received more and more attention. At present, the main development direction of the flexible display technology is an Organic Light-Emitting Diode (OLED). When a touch function is required, the touch sensing elements are independent of the display panel and are closer to the display surface. The user makes settings, that is, the flexible touch display panel is generally an on-cell. Such a setting structure may make the thickness of the touch display panel and the corresponding electronic product larger, which is not conducive to the thinning development of the electronic product, and the preparation process is also difficult, and also affects the flexibility of the OLED touch display product.

Summary of the invention

In order to solve the defect of the thickness of the flexible touch display panel, a touch display panel with a simple structure and a small thickness is provided.

Further, a touch display device including the foregoing touch display panel is further provided.

The embodiment of the invention discloses a touch display panel, which comprises a first flexible substrate, a touch sensing layer and a display layer which are sequentially stacked. The touch sensing layer is disposed on the surface of the first flexible substrate. a display layer, the display layer includes a first surface and a second surface disposed opposite to each other, the first surface abuts a surface of the touch sensing layer, the display layer emits light and exits from the second surface to display An image, the second surface is further configured to receive a touch operation, and the touch sensing layer is configured to sense the touch operation.

The present application also discloses a touch display device including the foregoing touch display panel.

Compared with the prior art, the touch sensing layer in the touch display panel is located between the display layer and the first flexible substrate, that is, on the side of the display layer away from the image display surface, so that the image of the display layer is not displayed. The touch sensing layer is disposed directly on the surface of the first flexible substrate, that is, the touch sensing layer and the first flexible substrate are not disposed or spaced apart from each other, thereby effectively reducing the thickness of the touch display panel. , simplifies the structure of the touch display panel.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying for creative labor.

1 is a schematic side view of a touch display panel according to an embodiment of the invention;

2 is a schematic structural view of a specific layer of a touch display panel according to a first embodiment of the present invention;

3 is a schematic structural view of a touch display panel layer in a second embodiment of the present invention as shown in FIG. 1;

4 is a pattern of the first electrode layer and the second electrode layer as shown in FIG. 2 or FIG. 3;

Figure 5 is a pattern structure of the cathode layer shown in Figure 2;

6 is a pattern of the cathode layer shown in FIG. 4-5 matching the first electrode layer and the second electrode layer;

7 is a schematic view showing a pattern structure of a light-emitting layer in the display layer shown in FIG. 2;

8 is a schematic view showing a pattern structure of a light-emitting layer and a first electrode layer and a second electrode layer in the display layer shown in FIG. 2;

FIG. 9 is a schematic diagram showing the planar structure of a touch display device according to an embodiment of the invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The structure of the touch display panel will be specifically described below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a schematic side view of a touch display panel according to an embodiment of the invention. As shown in FIG. 1 , the touch display panel 10 includes a first flexible substrate 11 , a touch sensing layer 13 , and a display layer 15 which are sequentially stacked in the light emitting direction F1 . The light emitting direction F1 is perpendicular to the direction of the plane where the touch display panel 10 is located.

The display layer 15 is for emitting light and displaying an image, including the first surface 151 and the second surface 153 disposed opposite to each other, wherein the first surface 151 directly conforms to the surface of the touch sensing layer 13. The light emitted by the display layer 15 is emitted from the second surface 153 to display an image, that is, the image displayed by the user's eye E in the direction adjacent to the second surface. At the same time, the second surface 153 is also used to receive a touch operation, for example, a touch operation of receiving the user's finger FI.

The touch sensing layer 13 is disposed between the display layer 13 and the first flexible substrate 11 for sensing the touch operation.

The first flexible substrate 11 includes a third surface 111 and a fourth surface 113. The touch sensing layer 11 is disposed on the fourth surface 113, that is, the touch sensing layer 13 and the display layer 15 are disposed on the first flexible substrate. 11 one side of the fourth surface 113. The material of the first flexible substrate 11 may be a polyimide resin, that is, the first flexible substrate 11 may be a PI layer.

Please refer to FIG. 2 , which is a schematic structural diagram of a specific layer of the touch display panel in the first embodiment of the present invention as shown in FIG. 1 .

As shown in FIG. 2, in the touch display panel 10, the touch sensing layer 13 includes a first electrode layer 131 and a second electrode layer which are insulated from each other and cooperate with each other for sensing a touch operation applied to the second surface 153 of the display layer 15. 133 and a second flexible substrate 132. The first electrode layer 131 and the second electrode layer 133 are sequentially disposed along the light emitting direction F1, and the second flexible substrate 132 is disposed between the first electrode layer 131 and the second electrode layer 133. The material of the second flexible substrate 132 is the same as the material of the first flexible substrate 11, and is a polyimide resin.

Preferably, the surface of the second flexible substrate 132 adjacent to the display layer 15 further includes a first electrode protection layer 134, that is, the first electrode protection layer 134 is disposed on the first surface 151 of the second flexible substrate 132 and the display layer 15. between. The first electrode protection layer 134 is used to protect the touch sensing layer 13, and the material thereof may be a transparent material such as SiO, SiN or SiO2.

The display layer 15 includes a driving control layer 154, an anode layer 155, a light emitting layer 156, a cathode layer 157, a polarizing layer 158, and a protective layer 159 which are sequentially stacked in the light emitting direction F1 from the first surface 151.

After the anode layer 155 and the cathode layer 157 are applied as voltages to the two electrodes, the light-emitting layer 153 is driven to emit light from the second surface 153 along the light-emitting direction F1.

The driving control layer 154 is used to control the anode layer 155 and the cathode layer 157 to drive the light emitting layer 156 to emit light for image display, that is, the driving control layer 154 controls the loading time of the anode layer 155 and the cathode layer 157 and loads The voltage magnitude is such that the light-emitting layer 153 is driven to emit light of a corresponding brightness for image display.

In this embodiment, the driving control layer 154 is a thin film transistor array layer (TFT layer). The material of the light-emitting layer 156 is an organic light-emitting material (Organic Light-Emitting). It can be understood that the light-emitting layer 156 specifically includes an electron transport layer, a multi-color organic light-emitting layer, a hole transport layer, and the like, wherein the multi-color organic light-emitting layer may be composed of red (R), green (G), and blue (B). The pixel unit of the three-color organic light-emitting material is composed.

Please refer to FIG. 3 , which is a structural diagram of a layer of a touch display panel according to a second embodiment of the present invention as shown in FIG. 1 .

As shown in FIG. 3 , the structure of the touch display panel 20 is substantially the same as that of the touch display panel 10 in the first embodiment. The difference is that the touch sensing layer 23 and the touch sensing layer 13 are different in structure.

Specifically, the touch sensing layer 23 includes a first electrode layer 231, a second electrode protective layer 234, a second electrode layer 233, and the like which are insulated from each other and cooperate with each other for sensing a touch operation applied to the second surface 253 of the display layer 25. Two flexible substrates 232. The first electrode layer 131, the second electrode thin layer 234, and the second electrode layer 133 are sequentially disposed on the second surface 213 of the first flexible substrate 21 in the light-emitting direction F1. The second flexible substrate 232 is disposed on the surface of the second electrode layer 233 , that is, the second flexible substrate 233 is disposed between the second electrode layer 233 and the first surface 251 of the display layer 25 . The second electrode protection layer 234 is used to insulate the first electrode layer 231 from the second electrode layer 233 to prevent mutual conduction therebetween. The material of the second electrode protection layer 234 may be a transparent material such as SiO, SiN, SiO 2 or the like.

It can be seen that the first electrode layer 131 and the second electrode layer 133 are spaced apart from the surface of the first flexible substrate 11 and the second flexible substrate 132, that is, according to the first structure. The flexible substrate 11, the first electrode layer 131, the second flexible substrate 132, and the second electrode layer 133 are sequentially stacked; or the first electrode layer 231 and the second electrode layer 233 are disposed on the first flexible substrate 21 and the second flexible layer Between the substrates 232, that is, the first flexible substrate 21, the first electrode layer 231, and the second electrode layer 233 are laminated in this order.

Please refer to FIG. 4 , which is a pattern of the first electrode layer and the second electrode layer as shown in FIG. 2 or FIG. 3 .

The first electrode layer 131 includes a plurality of first electrodes TX extending along the first direction X and insulated from each other and arranged at a first distance D1 along the second direction Y.

The second electrode layer 133 includes a plurality of second electrodes RX extending along the second direction Y and insulated from each other and arranged along the first direction X by a second distance D2. Wherein the first direction X is perpendicular to the second direction Y.

The second electrode RX has a first dimension S1 along the second direction, that is, the width of the second electrode RX is the first dimension S1.

In this embodiment, the first electrode TX is a touch driving electrode, that is, receiving a driving signal, and the second electrode RX is a touch sensing electrode for outputting a sensing signal, and the plurality of first electrodes TX and multiple The two electrodes RX cooperate with each other to sense the touch operation of the finger FI. Of course, the first electrode TX can also serve as a touch sensing electrode, and correspondingly, the second electrode RX serves as a touch driving electrode.

Preferably, the first electrode TX and the second electrode RX have a non-linear shape, such as a continuous wavy line shape, a continuous trapezoidal shape, or the like, such that the first electrode TX and the second electrode RX are both R, G, and B pixel units. There is no overlap in the light-emitting direction F1, so that it is possible to effectively prevent the signals of the pixel unit and the first electrode TX and the second electrode RX from interfering with each other.

In this embodiment, the first electrode TX and the second electrode RX are each a plurality of consecutive trapezoidal configurations, wherein the first electrode TX is formed by a trapezoid V1 protruding in a first direction X, and the second electrode RX is along a second The trapezoidal V2 in which the direction Y is convex is formed. The position CR at which the first electrode TX and the second electrode RX intersect is located between the adjacent two trapezoids V1 in the first electrode X and the two trapezoidal V2 adjacent to the second electrode RX. between.

Please refer to FIG. 5, which is a pattern structure of the cathode layer shown in FIG. 2.

As shown in FIG. 5, the cathode layer 157 includes a plurality of cathodes C extending along the second direction, insulated from each other and spaced apart by a third distance D3 along the first direction X, and alternately disposed along the first direction X and the cathode C. The first gap G1. The dimension of the first gap G1 along the first direction X is also the third distance D3, and the shape of the first gap G1 is the same as the shape of the second electrode RX.

In this embodiment, the plurality of cathodes C are electrically connected to each other and receive the same voltage.

Please refer to FIG. 6, which is a pattern of the cathode layer with the second electrode layer shown in FIG. 4-5.

Referring to FIGS. 4-5 and 6, the second electrode RX corresponds to the positional arrangement between the adjacent two cathodes C, that is, each of the second electrodes RX is disposed corresponding to a first gap G1. The width third distance D3 of the first gap G1 is greater than or equal to the first dimension S1 of the second electrode along the second direction Y.

Therefore, the position CR of the second electrode RX and the first electrode TX can be prevented from overlapping with the cathode C, so that the signals of the cathode C and the first electrode TX and the second electrode RX can be effectively prevented from interfering with each other to ensure interference. At the same time, the sensing of the image display and the touch operation is accurately performed.

Please refer to FIG. 7 , which is a schematic diagram of the pattern structure of the light-emitting layer 156 in the display layer 15 shown in FIG. 2 .

As shown in FIG. 7, the light emitting layer 156 includes a plurality of first pixel rows P1 arranged along the second direction Y, wherein each of the first pixel rows P1 includes a plurality of along the first direction X. The first color sub-pixel unit G of the fourth distance D4 is spaced. In this embodiment, the color of the first color sub-pixel unit G is green.

The light emitting layer 156 further includes a second pixel column P2 arranged along the first direction X, the second pixel column P2 including a plurality of second color sub-pixel units spaced apart by a fifth distance D5 along the second direction Y.

Preferably, the second pixel column P2 includes second color sub-pixel units R and third color sub-pixel units B that are alternately disposed. The color of the second color sub-pixel unit R is red, and the color of the third color sub-pixel unit B is blue.

In this embodiment, the first color sub-pixel unit G, the second color sub-pixel unit R, and the third color sub-pixel unit B are all diamond-shaped.

Please refer to FIG. 8 , which is a schematic diagram of a pattern structure of the light emitting layer 156 and the first electrode layer TX and the second electrode layer RX as shown in FIG. 2 . As shown in FIG. 8 , each first electrode TX corresponds to a first pixel row. P1 is set, and the first electrode TX is adjacent to the first pixel row P1 but does not overlap the first pixel row P1. The shape of the first electrode TX is also generally corresponding to a plurality of trapezoids in which the first color of the first pixel row P1 is continuous from the shape of the pixel unit G, wherein each trapezoid is semi-enclosed in a manner of adjacent to a first color. Sub-pixel unit G.

Each of the second electrodes RX is disposed corresponding to one second pixel column P2, and the first electrode RX is adjacent to the second pixel column P2 but does not overlap the second pixel column P2.

The shape of the second electrode RX also corresponds to a plurality of trapezoidal shapes in which the shapes of the second color sub-pixel unit R and the third color sub-pixel unit B in the second pixel column P2 are continuous, wherein each trapezoid is half The surrounding is adjacent to a second color sub-pixel unit R or a third color sub-pixel unit B.

It should be noted that the number of the first electrodes TX may be less than the number of the first pixel rows P1, and the number of the second electrodes RX may be less than the number of the second pixel columns P2. For example, a first electrode TX is disposed corresponding to each of the three first pixel rows P1, and a second electrode RX is disposed corresponding to each of the three second pixel columns P2. Of course, the specific first electrode TX and the second electrode RX are disposed. The quantity and quantity can be adjusted according to the actual situation, and not limited to this.

Compared with the prior art, the touch sensing layers 13 and 23 of the

touch display panels

10 and 20 are located between the display layers 15 and 25 and the first

flexible substrates

11 and 21, that is, located at the display layers 15 and 25 away from the image. Displaying one side of the surface so as not to affect the image display of the display layers 15, 25, and simultaneously, the touch sensing layers 13, 23 are directly disposed on the surface of the first flexible substrate, that is, the touch sensing layers 13, 23 and The other

flexible layers

11 and 21 are not disposed or spaced apart from each other, thereby effectively reducing the thickness of the

touch display panels

10 and 20 and simplifying the structure of the

touch display panels

10 and 20.

Further, the cathode layer 157 is provided with the first gap G1 corresponding to the second electrode RX, so that the signals of the cathode C and the first electrode TX and the second electrode RX can be effectively prevented from interfering with each other, so as to ensure accurate image display and touch operation at the same time. Sensing.

At the same time, the first electrode TX and the second electrode RX do not overlap with the pixel unit, so that the signals of the pixel unit and the first electrode TX and the second electrode RX can be effectively prevented from interfering with each other.

Please refer to FIG. 9 , which is a schematic plan view of the touch display device 100 including the

touch display panels

10 , 20 , as shown in FIG. 1-7 , wherein the

touch display panels

10 , 20 can be located in the touch shown in FIG. 9 a . The front surface 10a of the control display device 100 may be disposed on the back surface 10b of the touch display device 100 shown in FIG. 9b. It can be understood that the front surface 10a of the touch display device 100 is the side on which the image display is performed, and the back surface 10b of the touch display device 100 is the side facing the front surface 10a away from the image, and is usually a casing (not labeled). When the

touch display panels

10 and 20 are located on the back of the touch display device 100, the

touch display panels

10 and 20 can be used as the back fingerprint recognition.

The touch display device 100 can be a mobile communication terminal, such as a mobile phone or a tablet computer, or a display device having a touch function, and is not limited thereto.

The principles and embodiments of the present invention are described herein with reference to specific examples. The description of the above embodiments is only for the purpose of understanding the core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, There is a change in the scope of the present invention and the scope of the application, and the contents of the present specification should not be construed as limiting the invention.

Claims

A touch display panel, comprising:

a first flexible substrate;

a touch sensing layer disposed on the surface of the first flexible substrate;

a display layer, the display layer includes a first surface and a second surface disposed opposite to each other, the first surface conforms to a surface of the touch sensing layer, and the display layer emits light and exits from the second surface to display An image, the second surface is further configured to receive a touch operation, and the touch sensing layer is configured to sense the touch operation.
The touch display panel according to claim 1, wherein the first flexible substrate comprises oppositely disposed third surfaces and fourth surfaces, and the touch sensing layer is disposed on the fourth surface, the touch The sensing layer includes a first electrode layer and a second electrode layer insulated from each other and cooperating for sensing a touch operation applied to the second surface, the first electrode layer and the second electrode layer being perpendicular to The fourth surface is disposed in sequence away from the direction of the first flexible substrate.
The touch display panel of claim 1 , wherein the touch sensing layer comprises an insulated second flexible substrate, and the second flexible substrate is disposed on the first electrode layer and the second electrode layer between.
The touch display panel of claim 1 , wherein the touch sensing layer comprises an insulated second flexible substrate, and the second flexible substrate is disposed on the second electrode layer and the first surface between.
The touch display panel according to claim 3 or 4, wherein when the second flexible substrate is disposed between the first electrode layer and the second electrode layer, the second electrode layer A first electrode protection layer is further included between the first surface and the first electrode protection layer for insulating the second electrode layer from the display layer.
The touch display panel according to claim 3 or 4, wherein when the second flexible substrate is disposed between the second electrode layer and the first surface, the first electrode layer and The second electrode layer further includes a second electrode protection layer for insulating the first electrode layer and the second electrode layer from each other.
The touch display panel according to any one of claims 1 to 4, wherein:

The first electrode layer includes a plurality of first electrodes extending along the first direction, insulated from each other, and disposed at a first distance along the second direction, the second electrode layer including a plurality of extending along the second direction, a second electrode that is insulated from each other and disposed at a second distance along the first direction, the first direction being perpendicular to the second direction, the first electrode and the second electrode being non-linear.
The touch display panel according to claim 7, wherein the display layer comprises a driving control layer, an anode layer, a light emitting layer, and a light emitting layer, which are sequentially stacked from the first surface and adjacent to the second surface direction. a cathode layer, the driving control layer is configured to control the anode layer and the cathode layer to drive the light emitting layer to emit light for image display, and the cathode layer comprises a plurality of extending along the second direction, mutually insulated and along a cathode disposed at a third distance apart from the first direction;

The second electrode is disposed corresponding to a position between two adjacent cathodes, and the third distance is greater than or equal to a size of the second electrode in the second direction.
The touch display panel according to claim 8, wherein:

The light emitting layer includes a plurality of first pixel rows arranged along the second direction, wherein each of the first pixel rows includes a plurality of first color sub-ranges spaced apart by a fourth distance along the first direction Pixel unit

a second pixel column arranged along the first direction, the second pixel column comprising a plurality of second color sub-pixel units and third color sub-pixel units spaced apart by a fifth distance along the second direction and alternately disposed;

Each of the first electrodes is disposed corresponding to one first pixel row, and the first electrode is adjacent to the first pixel row and the first color sub-pixel unit does not overlap;

Each of the second electrodes is disposed corresponding to one second pixel column, and the second electrode is adjacent to the second pixel column and the second color sub-pixel unit does not overlap.
A touch display device comprising the touch display panel according to any one of claims 1-9.