CN113760112A

CN113760112A - Display device

Info

Publication number: CN113760112A
Application number: CN202010493626.6A
Authority: CN
Inventors: 林源城; 袁泽
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-12-07

Abstract

The application provides a display device, including: the touch control module is arranged on the display module and comprises an electrode layer, a lead layer and a shielding layer which are sequentially stacked, the electrode layer comprises a plurality of spaced induction blocks, and the induction blocks are used for acting with fingers to generate touch control signals; the lead layer comprises a plurality of lead lines, and each lead line is electrically connected with one induction block so as to transmit the touch signal; the shielding layer is arranged between the lead layer and the display module, and is used for shielding electric signal interference between the electrode layer and the display module. The display device provided by the application can realize multi-finger simultaneous touch.

Description

Display device

Technical Field

The application relates to the technical field of electronic equipment, in particular to a display device.

Background

The flexible display screen has the characteristic of being deformable and bendable, so that the application range is wider and wider. In the related art, a touch screen in a flexible display screen realizes detection of a finger touch position by a mutual capacitance or self-capacitance principle. The self-capacitance is formed between the conductive film and the ground electrode, and when a finger touches the touch screen, the capacitance of the finger is superposed on the capacitance of the touch screen, so that the capacitance of the touch screen is increased. Mutual capacitance is two poles of a capacitor formed by two groups of electrodes respectively, and when a finger touches the touch screen, the coupling between the two electrodes is changed, so that the capacitance between the two electrodes is changed. Compared with a mutual capacitance touch screen, the capacitance change caused by human touch in the self-capacitance touch screen is larger.

However, during touch detection, the self-capacitance touch screen detects the capacitance changes before and after the touch of the transverse and longitudinal electrode arrays respectively, and determines the transverse coordinate and the longitudinal coordinate. When multiple fingers touch simultaneously, ghost points appear in coordinates obtained by combining the multiple horizontal coordinates and the multiple vertical coordinates. Obviously, in the related art, the scheme of the self-capacitance touch screen in the flexible display screen cannot really realize simultaneous multi-finger touch. Therefore, it is a technical problem to be solved to provide a self-capacitance touch screen capable of realizing multi-finger simultaneous touch.

Disclosure of Invention

The application provides a display device capable of realizing multi-finger simultaneous touch.

The application provides a display device. The display device comprises a display module and a touch module. The touch module is arranged on the display module and comprises an electrode layer, a lead layer and a shielding layer which are sequentially stacked, the electrode layer comprises a plurality of spaced induction blocks, and the induction blocks are used for acting with fingers to generate touch signals; the lead layer comprises a plurality of lead lines, and each lead line is electrically connected with one induction block so as to transmit the touch signal; the shielding layer is arranged between the lead layer and the display module, and is used for shielding electric signal interference between the electrode layer and the display module.

The electrode layer of the touch module in the display device comprises a plurality of spaced sensing blocks, and the sensing blocks are used for acting with fingers to generate touch signals. In other words, when a single finger touches, the capacitance value of the corresponding sensing block changes. When a plurality of fingers touch, capacitance values of a plurality of induction blocks corresponding to the plurality of fingers are changed. Each induction block is connected through an independent lead line, so that self-capacitance multi-finger touch control can be realized. The stack structure design scheme of the electrode layer, the lead layer and the shielding layer can increase the induction area of the electrode layer, reduce the touch blind area and realize the miniaturization of the display device. Furthermore, the shielding layer shields the electric signal interference between the electrode layer and the display module, so that a higher signal-to-noise ratio can be realized, and the induction performance of the touch module is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic external view of a display device according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of another display device provided in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a pixel unit layer of a display device according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a structure of an electrode layer and a lead layer of a display device according to an embodiment of the present disclosure.

Fig. 8 is a partially enlarged schematic view of the display device shown in fig. 7.

Fig. 9 is a schematic structural diagram of a touch module of a display device according to an embodiment of the present disclosure.

Fig. 10 is a schematic view illustrating another structure of a touch module of a display device according to an embodiment of the disclosure.

Fig. 11 is a schematic structural diagram of an electrode layer, a lead layer and a shielding layer according to an embodiment of the present disclosure.

Fig. 12 is a schematic stacked view of a touch module of a display device according to an embodiment of the present disclosure.

Fig. 13 is a schematic stacked view of a display device according to an embodiment of the present application.

Detailed Description

The display device provided by the application can be an independent display screen or an electronic device provided with the display screen.

The display screen may be a capacitive touch screen. The capacitive touch screen senses the touch behavior of the screen surface in an electric field induction mode. In one embodiment, the capacitive touch screen is coated with a uniform Indium Tin Oxide (ITO) semiconductor transparent conductive film, the ITO is electrically connected to a controller through a conductive wire, and a uniform electric field is generated on the surface of the touch screen during operation. When the grounded object touches the surface of the touch screen, the electrodes sense the change of the charges on the surface of the touch screen, and the coordinates of a touch point are determined.

The electronic device may be a Mobile phone, a tablet Computer, a desktop Computer, a laptop Computer, an electronic reader, a handheld Computer, an electronic display screen, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, a media player, a watch, or other devices having a capacitive touch screen.

The embodiment of the application is described by taking a flexible display screen as an example, but a hard display screen is also applicable to the application, and is not repeated in the following.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a display device 100 according to an embodiment of the present disclosure. In the embodiment of the present application, the length direction of the display device 100 is defined as the X-axis direction. The width direction of the display device 100 is defined as the Y-axis direction. The thickness direction of the display device 100 is defined as the Z-axis direction. Hereinafter, the longitudinal direction, the width direction, and the thickness direction will be simply referred to.

As shown in fig. 1, the display device 100 includes a display module 10 and a touch module 20 disposed on the display module 10. Specifically, the display module 10 and the touch module 20 are disposed along the thickness direction. In one embodiment, the touch module 20 may be attached to the display module 10 by an optical adhesive. In another embodiment, the touch module 20 may be fabricated on an encapsulation film of the display module 10. The touch module 20 is closer to the outer surface of the display device 100 than the display module 10 in the thickness direction. In the embodiment of the present application, the display module 10 and the touch module 20 can be bent to realize the characteristic that the display device 100 can be bent and deformed.

Alternatively, as shown in fig. 2, the display module 10 may include a light emitting layer 101 and an encapsulation layer 102. The light emitting layer 101 is for emitting light. The light emitting layer 101 may include a flexible substrate, a driving substrate, and a display unit. The flexible substrate may be a plastic substrate, a metal aluminum foil, thin glass, or the like. The driving substrate includes a hydrogenated amorphous silicon Thin Film Transistor (TFT), a polysilicon TFT, an organic TFT, an oxide TFT, and the like. The Display unit may be an Organic Light Emitting Display (OLED) or the like. The encapsulation layer 102 includes an organic material layer and/or an inorganic material layer. The encapsulation layer 102 can prevent water and oxygen from invading the conductive circuit or reduce the impact on the display module 10.

In one embodiment, as shown in fig. 3, the light emitting layer 101 includes a cathode 110, an organic light emitting layer 111, an anode 112, a thin Film transistor layer 113, and a Polyimide Film 114 (PI) sequentially disposed along a thickness direction. The polyimide film 114 serves as a base material. The anode 112 and the cathode 110 are connected to an external controller, and the controller controls the thin film transistor 113 to drive the organic light emitting layer 111 to emit light. The encapsulation layer 102 includes a first inorganic layer 120, an organic layer 121, and a second inorganic layer 122 sequentially arranged in a thickness direction.

Alternatively, referring to fig. 3 and 4, the organic light emitting layer 111 includes a pixel unit layer 115. The pixel unit layer 115 includes a plurality of pixel units 115a arranged in an array. Each pixel unit 115a includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. A plurality of pixel cells 115a form a grid gap 115b therebetween.

As shown in fig. 5, the touch module 20 includes an electrode layer 201, a lead layer 202, and a shielding layer 203, which are sequentially stacked. Specifically, the electrode layer 201, the lead layer 202, and the shield layer 203 are stacked in this order in the thickness direction. Here, "stacked in order" indicates an arrangement relationship of the electrode layer 201, the lead layer 202, and the shield layer 203 in the thickness direction. It is understood that other film layers may be disposed between the electrode layer 201 and the lead layer 202, and between the lead layer 202 and the shielding layer 203. Alternatively, the electrode layer 201 is bonded to the lead layer 202, and the lead layer 202 is bonded to the shield layer 203.

Specifically, referring to fig. 5, the electrode layer 201 includes a plurality of spaced apart sensing blocks 210. The sensing block 210 is used for acting with a finger to generate a touch signal. It can be understood that a capacitance is formed between the sensing blocks 210 and the ground, and when a finger touches any one of the sensing blocks 210, the capacitance between the sensing block 210 and the ground changes. When the plurality of fingers touch the plurality of sensing blocks 210, capacitance values between the plurality of sensing blocks 210 and the ground are all changed. It should be noted that, in the present application, a commonly used touch operation "finger touch" is taken as an example for explanation. In other embodiments, the sensing unit may be other parts of a human body or other objects capable of changing the capacitance between the sensing block 210 and the ground when touching. Here, "spaced" means that there is a gap between adjacent sensing blocks 210. The gap between spaced sensing blocks 210 cannot be too small to ensure less interference between adjacent sensing blocks 210. Meanwhile, the gap between the spaced sensing blocks 210 cannot be too large, so as to avoid the occurrence of a touch blind area. Optionally, a plurality of spaced apart sensing blocks 210 are located on the same plane. The plane of the sensing block 210 is substantially parallel to the XY-plane. In other embodiments, the electrode layer 201 may further include a first dielectric substrate 215 encasing the plurality of spaced apart sense bumps 210. The first insulating dielectric substrate 215 may be a silicon nitride film or the like. The first dielectric substrate 215 is used to insulate the plurality of spaced apart sensing blocks 210.

Specifically, referring to fig. 5, the lead layer 202 includes a plurality of lead lines 220. Each of the lead lines 220 is electrically connected to one of the sensing blocks 210 to transmit the touch signal. The lead layer 202 is used to lead out a plurality of sensing blocks 210 located at different positions through lead lines 220 so as to be electrically connected with an external controller. Alternatively, the plurality of lead lines 220 are located on the same plane. The plane of the lead lines 220 is substantially parallel to the XY plane. The lead line 220 represents a connection line having a conductive function. The plurality of lead lines 220 may be the same size or different sizes. In one embodiment, the lead lines 220 comprise metallic conductive wires. The width dimensions of the lead lines 220 are substantially the same, and the length dimensions of the lead lines 220 are different. The lead line 220 may have a linear shape, a sheet shape, a bar shape, a columnar shape, or the like. The number of lead lines 220 may be greater than, equal to, or less than the number of sense blocks 210. In one embodiment, the number of lead lines 220 is equal to the number of sensing blocks 210. One lead line 220 is electrically connected to one sensing block 210. One end of each of the lead lines 220 is electrically connected to the corresponding sensing block 210, and the other end of each of the lead lines 220 extends in the longitudinal direction of the display device 100. The other ends of the plurality of lead lines 220 are substantially flush along the length of the display device 100. Of course, in other embodiments, the other ends of the plurality of lead lines 220 may extend in the width direction of the display device 100. The other ends of the plurality of lead lines 220 may be substantially flush in the width direction of the display device 100. In other embodiments, the lead layer 202 may further include a second insulating dielectric substrate 223 encasing the plurality of lead lines 220. The second insulating dielectric substrate 223 may be a silicon nitride film or the like. The second insulating dielectric substrate 223 is provided to insulate the plurality of lead lines 220.

Specifically, referring to fig. 5, the shielding layer 203 is disposed between the lead layer 202 and the display module 10. In other words, the shielding layer 203 is disposed on the side of the lead layer 202 away from the electrode layer 201, and includes the electrode layer 201, the lead layer 202, the shielding layer 203, and the display module 10 in this order in the thickness direction. The shielding layer 203 is used for shielding the electric signal interference between the electrode layer 201 and the display module 10. The shield layer 203 may include a metal substrate. The shield layer 203 may also include various patterned conductive substrates. In one embodiment, the orthographic projection of the shielding layer 203 on the plane of the sensing block 210 covers each sensing block 210. In another embodiment, the shielding layer 203 includes a plurality of metal substrates, one metal substrate being disposed opposite to one sensing block 210 in a thickness direction.

Further, as shown in fig. 6, the display device 100 further includes a cover 30 and a polarizer 40. Optionally, the touch module 20 is fabricated on the package layer 102 of the display module 10. The cover plate 30 and the polarizer 40 are sequentially arranged on one side of the touch module 20 departing from the display module 10. The polarizer 40 is used to polarize light. The cover plate 30 is used to protect the polarizer 40. The cover plate 30 and the polarizer 40 have light transmittance. In one embodiment, the cover plate 30, the polarizer 40, the electrode layer 201, the lead layer 202, the shielding layer 203, the first inorganic layer 120, the organic layer 121, the second inorganic layer 122, the cathode 110, the organic light emitting layer 111, the anode 112, the thin film transistor layer 113, and the PI thin film 114 are sequentially disposed along the thickness direction.

By providing a display device 100, an electrode layer 201 of a touch module 20 in the display device 100 includes a plurality of spaced apart sensing blocks 210, and the sensing blocks 210 are used for acting with a finger to generate a touch signal. In other words, when a single finger touches, the capacitance value of the corresponding sensing block 210 changes. When a plurality of fingers touch, capacitance values of the sensing blocks 210 corresponding to the plurality of fingers change. Each sensing block 210 is connected through an independent lead line 220, so that self-capacitance multi-finger touch can be realized. The stacked design scheme of the electrode layer 201, the lead layer 202 and the shielding layer 203 can increase the sensing area of the electrode layer 201, reduce the touch blind area, and realize the miniaturization of the display device 100. Further, the shielding layer 203 shields the electric signal interference between the electrode layer 201 and the display module 10, so that a higher signal-to-noise ratio can be realized, and the sensing performance of the touch component is improved.

The following embodiments illustrate the structure of the touch module 20, and it is understood that the structure of the touch module 20 of the present application includes, but is not limited to, the following embodiments.

In one embodiment, referring to fig. 7 and 8, the plurality of sensing blocks 210 are located on the same plane of the electrode layer 201. The plurality of sensing blocks 210 are arranged in an array. Optionally, the plurality of sensing blocks 210 are arranged in M rows and N columns. Wherein M and N are integers greater than or equal to 1. Optionally, M is greater than N. Each sensing block 210 is in a grid shape. The sensing blocks 210 may be triangular meshes, rectangular meshes, polygonal meshes, and other patterns of meshes. Of course, M may also be less than or equal to N in other embodiments. It is to be understood that the sensing block 210 of the present application is not limited to a grid shape. In other embodiments, the sensing block 210 may also be a rectangular block, a triangular block, other patterns, etc. made of transparent material.

By arranging the sensing block 210 in a grid shape, when the sensing block 210 is made of opaque material, the sensing block 210 can be prevented from blocking the light of the display module 10.

Further, referring to fig. 7 and 8, the orthographic projection of the sensing block 210 on the pixel unit layer 115 is located in the grid gap 115b between the pixel units 115 a. Specifically, each of the sensing blocks 210 includes a plurality of first conductive portions 211 arranged laterally and a plurality of second conductive portions 212 arranged longitudinally. The first conductive portion 211 and the second conductive portion 212 form a first gap 216. The orthographic projections of the first and second

conductive portions

211 and 212 on the pixel cell layer 115 are located within the grid gaps 115b between the pixel cells 115 a. The first gap 216 is opposite to a red sub-pixel, a green sub-pixel, or a blue sub-pixel on the pixel unit layer 115. Wherein the orthographic projection of each sensing block 210 on the pixel unit layer 115 can cover one or more pixel units 115 a. When each sensing block 210 covers one pixel unit 115a, the orthographic projection of the first conductive part 211 and the second conductive part 212 on the pixel unit layer 115 is located at the grid gap 115b between the red sub-pixel, the green sub-pixel and the blue sub-pixel on the pixel unit 115 a. When each sensing block 210 covers a plurality of pixel units 115a, the orthographic projection of the first conductive part 211 and the second conductive part 212 on the pixel unit layer 115 is located at a grid gap 115b between sub-pixels on the pixel unit 115a, or at a grid gap 115b between two pixel units 115 a.

In one embodiment, referring to fig. 8 and 9, the plurality of lead lines 220 are located on the same plane of the lead layer 202. And the plane of the plurality of lead lines 220 is substantially parallel to the plane of the plurality of sensing blocks 210. The plurality of lead lines 220 may be arranged in sequence or in parallel. Optionally, the orthographic projection of the plurality of lead lines 220 on the pixel cell layer 115 is located within the grid gaps 115b between the pixel cells 115 a. Of course, in other embodiments, the lead lines 220 may be made of a transparent material, and the orthographic projection of the lead lines 220 on the pixel unit layer 115 may be located on the red sub-pixels, the green sub-pixels and the blue sub-pixels.

Optionally, referring to fig. 9, the shielding layer 203 includes a conductive substrate 230. The orthographic projection of the conductive substrate 230 on the electrode layer 201 covers the sensing block 210. The shielding layer 203 may be a continuous layer of transparent conductive material covering the sub-pixels.

Optionally, referring to fig. 10, the shielding layer 203 includes a plurality of conductive mesh plates 231 disposed at intervals. The orthographic projection of each conductive grid plate 231 on the electrode layer 201 covers a corresponding one of the sensing blocks 210. In one embodiment, the number of the conductive mesh plates 231 on the shielding layer 203 is the same as the number of the sensing blocks 210. The orthographic projection of one conductive grid plate 231 on the electrode layer 201 covers a corresponding one of the sensing blocks 210.

Specifically, referring to fig. 10 and 11, the conductive grid plate 231 includes a plurality of third conductive portions 213 arranged in a transverse direction and a plurality of fourth conductive portions 214 arranged in a longitudinal direction. The orthographic projection of the third conductive part 213 on the electrode layer 201 at least partially covers the first conductive part 211 on the corresponding sensing block 210. The orthographic projection of the fourth conductive part 214 on the electrode layer 201 at least partially covers the second conductive part 212 on the corresponding sensing block 210. Optionally, the orthographic projection of the third conductive part 213 on the electrode layer 201 covers all of the first conductive parts 211 on the corresponding sensing blocks 210. The orthographic projection of the fourth conductive part 214 on the electrode layer 201 covers all the second conductive parts 212 on the corresponding sensing blocks 210. Optionally, the length and width of the third conductive portion 213 are greater than the first conductive portion 211. The fourth conductive portion 214 has a length and width greater than the second conductive portion 212. Optionally, the third conductive portion 213 and the fourth conductive portion 214 are enclosed to form a plurality of second voids 217, each second void 217 corresponds to the first void 216 enclosed by the first conductive portion 211 and the second conductive portion 212 one by one, and the area of the second void 217 is smaller than the area of the corresponding first void 216 enclosed by the first conductive portion 211 and the second conductive portion 212. The area of each second gap 217 formed by enclosing the third conductive portion 213 and the fourth conductive portion 214 is larger than that of each sub-pixel to avoid blocking the sub-pixel. In this embodiment, the covering relationship between the conductive grid plate 231 and the corresponding sensing block 210 can ensure that the shielding layer 203 has a better shielding effect.

Optionally, as shown in fig. 12, the touch module 20 further includes a first insulating layer 204 and a plurality of first conductive vias 240 penetrating through the first insulating layer 204.

Optionally, the material of the first insulating layer 204 may be a resin insulating layer, a fiber insulating layer, a plastic insulating layer, a composite insulating layer, a film insulating layer, or the like. For example, the first insulating layer 204 may be transparent fiberglass, transparent mylar, pressure sensitive adhesive, or the like.

In one embodiment, the first insulating layer 204 is disposed between the electrode layer 201 and the lead line 220. Specifically, the first insulating layer 204 is sandwiched between the electrode layer 201 and the lead layer 202.

The first conductive via 240 is used to electrically connect the sensing block 210 and the lead line 220. In one embodiment, a conductive layer is disposed within the first conductive via 240. One end of the conductive layer is electrically connected to the sensing block 210, and the other end is electrically connected to the lead line 220. In another embodiment, the conductive bumps extend beyond the conductive layer filling the vias and electrically connect to the lead lines 220.

By disposing the first insulating layer 204 between the electrode layer 201 and the lead line 220, a short circuit between the sensing block 210 and the lead line 220 can be avoided. Through setting up first electrically conductive via 240 and electrically connecting induction block 210 and lead wire 220, for the mode of directly connecting lead wire 220 at the plane that induction block 210 is located, can increase the area of electrode layer 201 induction zone, reduce the touch-control blind area to improve touch-control performance.

Further, as shown in fig. 12, the touch module 20 further includes a second insulating layer 205 and a plurality of second conductive vias 251 penetrating through the second insulating layer 205.

Alternatively, the material of the second insulating layer 205 may be a resin insulating layer, a fiber insulating layer, a plastic insulating layer, a composite insulating layer, a film insulating layer, or the like. For example, the second insulating layer 205 may be transparent glass fiber, transparent polyester film, pressure sensitive adhesive, or the like.

In one embodiment, as shown in fig. 12, the second insulating layer 205 is used to insulate the lead line 220 from the shielding layer 203. The second insulating layer 205 is sandwiched between the lead line 220 and the shielding layer 203. It is understood that the electrode layer 201, the lead line 220, the second insulating layer 205, and the shielding layer 203 are sequentially disposed in the thickness direction. By providing the second insulating layer 205 between the lead line 220 and the shield layer 203, a short circuit between the lead line 220 and the shield layer 203 can be avoided.

The second conductive via 251 is used to electrically connect the lead line 220 and the shield layer 203. One end of the second conductive via 251 is electrically connected to the lead line 220. The other end of the second conductive via 251 is electrically connected to the shielding layer 203. In one embodiment, a conductive layer is disposed in the second conductive via 251. One end of the conductive layer is electrically connected to the lead line 220. The other end is electrically connected with the shielding layer 203. In another embodiment, the conductive bumps extend beyond the conductive layer filling the vias and are electrically connected to the shield layer 203.

In one embodiment, the number of lead lines 220 is greater than the number of sensing blocks 210. A portion of the lead lines 220 is used to electrically connect the sensing block 210 and the controller, so that sensing signals can be transmitted between the sensing block 210, the lead lines 220 and the controller. The other part of the lead line 220 is used for electrically connecting the shielding layer 203 and the controller so as to enable the shielding signal to be transmitted between the shielding layer 203, the lead line 220 and the controller. In one embodiment, the controller is configured to send the same electrical signal to the electrode layer 201 and the shielding layer 203 when the electrode layer 201 is in operation. In this embodiment, since the potential difference between the electrode layer 201 and the shield layer 203 is small, a problem of a large load when the distance between the electrode layer 201 and the shield layer 203 is small can be avoided. In other embodiments, the shielding layer 203 may also be directly electrically connected to the ground or the electrical signal on the shielding layer 203 and the electrode layer 201 may be different.

By arranging the second conductive via 251 to electrically connect the shielding layer 203 and the lead line 220, the same electrical signal can be sent to the electrode layer 201 and the shielding layer 203 through the controller, thereby avoiding the problem of large load when the distance between the electrode layer 201 and the shielding layer 203 is small. In addition, the lead lines 220 electrically connecting the sensing block 210 and the controller, and the lead lines 220 electrically connecting the shielding layer 203 and the controller are all located on the lead line 220 layer, so that the size of the touch module 20 in the thickness direction can be reduced. The second conductive via 251 penetrates through the second insulating layer 205, which can reduce the potential difference between the shielding layer 203 and the electrode layer 201, and improve the shielding performance.

Further, referring to fig. 12 and 13, the touch module 20 further includes a buffer layer 206. The buffer layer 206 is disposed between the shielding layer 203 and the display module 10. The touch module 20 includes an electrode layer 201, a first insulating layer 204, a lead line 220, a second insulating layer 205, a shielding layer 203, and a buffer layer 206 in sequence along a thickness direction. In one embodiment, the buffer layer 206 is disposed between the shielding layer 203 and the display module 10. In other words, the buffer layer 206 has the same area as the shield layer 203. In another embodiment, the buffer layer 206 includes a plurality of buffer portions disposed adjacently or at intervals, and the plurality of buffer portions are sandwiched between the shielding layer 203 and the display module 10. The buffer layer 206 may be an inorganic buffer layer 206, for example: silica, zinc oxide, and the like. In other embodiments, the cushioning layer 206 may also be a layer of glue.

By disposing the buffer layer 206 between the shielding layer 203 and the display module 10, the buffer layer 206 can prevent the packaging layer 102 from being damaged by the process when the touch module 20 is fabricated on the packaging layer 102 of the display film set.

Optionally, as shown in fig. 13, the touch module 20 includes a first wire bonding region 221 for electrically connecting to an external circuit. The first wire bonding region 221 may be located on the lead layer 202 of the touch module 20.

Optionally, as shown in fig. 13, the display module 10 is electrically connected to an external controller through a metal trace. In one embodiment, one end of the metal trace is connected to the electrode on the display module, and the other end of the metal trace forms a second wire bonding region 222 for electrically connecting to the external circuit. The second wire bonding region 222 may be located on a metal wiring layer of the display module 10.

In one embodiment, the first wire bonding region 221 and the second wire bonding region 222 are both located on the wire layer 202. In this embodiment, both the first wire bond region 221 and the second wire bond region 222 may be electrically connected to an external controller through wire vias in the wire layer 202. In this embodiment, the first wire bonding regions 221 and the second wire bonding regions 222 are located on the same layer, and the bonding and packaging of the circuit and the pins on the touch module 20 and the display module 10 can be completed at one time in the manufacturing process of the display device 100.

The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A display device, comprising:

a display module; and

the touch module is arranged on the display module and comprises an electrode layer, a lead layer and a shielding layer which are sequentially stacked, the electrode layer comprises a plurality of spaced induction blocks, and the induction blocks are used for acting with fingers to generate touch signals; the lead layer comprises a plurality of lead lines, each lead line is electrically connected with one induction block, and each induction block independently transmits the touch signal through the corresponding lead line; the shielding layer is arranged between the lead layer and the display module, and is used for shielding electric signal interference between the electrode layer and the display module.

2. The display device according to claim 1, wherein the touch module further comprises a first insulating layer and a plurality of first conductive vias penetrating through the first insulating layer, the first insulating layer is disposed between the electrode layer and the lead line layer, one ends of the first conductive vias are electrically connected to the sensing blocks, and the other ends of the first conductive vias are electrically connected to the lead line.

3. The display device according to claim 1, wherein the shielding layer comprises a light-transmissive conductive substrate, and an orthographic projection of the conductive substrate on the electrode layer covers the sensing blocks.

4. The display device according to claim 1, wherein the shielding layer comprises a plurality of conductive mesh plates arranged at intervals, and an orthographic projection of each conductive mesh plate on the electrode layer covers a corresponding one of the sensing blocks.

5. The display device according to claim 4, wherein the sensing blocks are in a grid shape.

6. The display device according to claim 5, wherein each sensing block encloses a plurality of first gaps arranged at intervals, each conductive grid plate encloses a plurality of second gaps arranged at intervals, the first gaps and the second gaps are arranged correspondingly, and the area of the second gaps is smaller than that of the first gaps.

7. The display device according to claim 1, wherein the display module comprises a pixel unit layer, the pixel unit layer comprises a plurality of pixel units arranged in an array and a grid gap surrounding the plurality of pixel units, and an orthogonal projection of the sensing block on the pixel unit layer is located in the grid gap.

8. The display device according to any one of claims 1 to 7, wherein the touch module further comprises a second insulating layer and a plurality of second conductive vias penetrating through the second insulating layer, the second insulating layer is disposed between the lead layer and the shielding layer, one end of each second conductive via is electrically connected to the lead line, and the other end of each second conductive via is electrically connected to the shielding layer.

9. The display device according to any one of claims 1 to 7, wherein the shielding layer is connected to a ground electrode.

10. A display device as claimed in any one of claims 1 to 7, further comprising a controller for sending the same electrical signals to the electrode layer and the shielding layer when the electrode layer is in operation.

11. The display device according to claim 10, wherein the touch module further comprises a first wire bonding area for electrically connecting the controller, the display module further comprises a second wire bonding area for electrically connecting the controller, and the first wire bonding area and the second wire bonding area are located in the same layer.

12. The display device according to any one of claims 1 to 7, wherein the touch module further comprises a buffer layer, and the buffer layer is disposed between the shielding layer and the display module; the display module further comprises an encapsulation layer and a light-emitting layer, wherein the encapsulation layer is arranged between the buffer layer and the light-emitting layer; the display device further comprises a cover plate and a polaroid, the cover plate and the polaroid are sequentially arranged on one side, deviating from the electrode layer, of the buffer layer, the polaroid is used for polarizing light, and the cover plate is used for protecting the polaroid.