TW201710843A - Electronic device - Google Patents

Abstract

The present invention provides an electronic device. The electronic device includes a touch display unit with a touch display surface and at least one pressure sensor. The touch display surface includes a display area and a non-display area surrounding the display area. The at least one pressure sensor is disposed on one side of the touch display unit away from the display surface corresponding to the non-display area. Each pressure sensor includes at least one first elastic body and at least one second elastic body, and both of the elastic bodies have different rebound resilience. The pressure senor detects pressing force applied to the touch display surface, and converted the pressing force into electric signals according to the change of elasticity of the first elastic body and the second elastic body.

Description

Electronic device

The present invention relates to an electronic device capable of sensing touch pressure.

In recent years, touch panels have been widely used as input devices for electronic products in touch display products such as mobile phones, computers, game consoles, and televisions. However, the touch function of the existing touch panel products is mainly used to determine the touch position, and it is difficult to know the touch strength. Therefore, a pressure sensor can be added to the touch display product to detect the touch pressure. The pressure sensor generally includes an upper electrode, a lower electrode, and an elastic body disposed between the upper and lower electrodes. When a touch action is generated on the touch panel, the elastic body is elastically deformed to cause a capacitance value between the upper and lower electrodes or The resistance value changes, and the touch pressing force is detected according to the magnitude of the change. However, after repeated application of the pressure sensor, the elastomer is prone to elastic fatigue and affects the detection effect.

In view of the above, it is necessary to provide an electronic device that slows down the occurrence of elastic fatigue.

An electronic device includes: a touch display unit having a touch display surface, the touch display surface defining a touch display area and a non-touch display area surrounding the touch display area. The electronic device further includes: at least one pressure sensor disposed on a side of the touch display unit away from the touch display surface, and corresponding to the non-touch display area. Each of the pressure sensors includes at least one first elastomer and at least one second elastomer. The first elastic body and the second elastic body have different resilience, and the elastic force of the first elastic body and the second elastic body senses a magnitude of a force applied to the touch display surface and The force is converted into a corresponding electrical signal, and the electronic device performs a corresponding function based on the electrical signal.

Compared with the prior art, the pressure sensor in the electronic device of the present invention is provided with first and second elastic bodies having different resilience, so that the elastic body with stronger resilience plays the role of auxiliary support and slows the rebound resilience. The weaker elastomers are elastically fatigued due to multiple uses and thus affect the detection.

1 is a schematic cross-sectional view of an electronic device according to a first embodiment of the present invention.

2 is a schematic plan view showing the plane distribution of the first elastic body and the second elastic body in the pressure sensor of FIG. 1.

3 is a schematic view showing the structure of the pressure sensor of FIG. 2 at the position of the line III-III.

4 to 6 are schematic cross-sectional structural views of an electronic device according to a modified embodiment of a position where a pressure sensor is disposed.

Fig. 7 is a schematic cross-sectional view showing a pressure sensor according to a modified embodiment.

FIG. 8 is a schematic cross-sectional view of an electronic device according to a second embodiment of the present invention.

FIG. 9 is a schematic structural view of the pressure sensor of FIG. 8. FIG.

FIG. 10 is a cross-sectional structural diagram of an electronic device according to a third embodiment of the present invention.

11 is a schematic structural view of the pressure sensor of FIG.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1. FIG. 1 is a cross-sectional structural diagram of an electronic device 1 according to a first embodiment of the present invention. The electronic device 1 can be a touch display device such as a mobile phone, a computer, a game machine, or a television. The electronic device 1 includes a touch display unit 10 , at least one pressure sensor 140 , and a housing 150 . The touch display unit 10 has a touch display surface 100. The touch display surface 100 defines a touch display area 100a and a non-touch display area 100b surrounding the touch display area 100a. The at least one pressure sensor 140 is disposed on a side of the touch display unit 10 away from the touch display surface 100, and is located between the touch display unit 10 and the housing 150 corresponding to the non-touch display area 100b. Settings. The housing 150 includes at least two side walls 151 and a bottom wall 152 connecting the at least two side walls 151. The at least two side walls 151 and the bottom wall 152 together form a receiving cavity 153 for receiving the touch display unit 10 and the at least one pressure sensor 140. Each of the side walls 151 includes a first portion 151a and a second portion 151b, and the first portion 151a and the second portion 151b form a stepped structure. The distance between the second portion 151b and the bottom wall 152 is closer than the distance between the first portion 151a and the bottom wall 152. In this embodiment, the housing 150 includes four side walls 151 connected end to end. The four side walls 151 and the bottom wall 152 collectively define the receiving cavity 153.

The touch display unit 10 further includes a cover 110, a touch panel 120, and a display module 130. The cover plate 110 is disposed on the touch panel 120 for protection. The cover plate 110 can be made of transparent glass, film, plastic, flexible material, or the like. The touch panel 120 is disposed on the display module 130, and has a sensing area (not shown) and a non-sensing area (not shown) surrounding the sensing area, the sensing area and the touch The control display area 100a corresponds to the non-touch display area 100b. The sensing area of the touch panel 120 is formed with a sensing electrode structure (not shown) for sensing a touch operation to generate a touch signal, and the non-sensing area is formed with a plurality of leads (not shown). The plurality of leads are used to electrically connect the sensing electrode structure to a flexible printed circuit (FPC) (not shown) to transmit the touch signal to the external control circuit through the FPC.

The display module 130 further includes a display panel 131 and a backlight element 132. The display panel 131 and the backlight element 132 can be fixed by a plastic frame (not shown). The backlight element 132 can further include an optical film set, a light guide plate, a light source, a reflective sheet, and a back sheet (not shown). The optical film set, the light guide plate, the reflective sheet and the back plate are sequentially stacked, and the light source is disposed on one side of the light guide plate. The optical film set, the light guide plate, the light source and the reflective sheet are fixed by the plastic frame, and the plastic frame is further used to carry the touch panel 120. The back plate is disposed under the reflective sheet and covers the reflective sheet and the plastic frame to carry the components of the backlight element 132. The display panel is disposed above the optical film set, and the backlight element 132 is configured to provide a backlight required for the display panel 131 to display a picture. It can be understood that the display module 130 can also be a self-luminous display module, such as an organic electroluminescence display (OLED), without the need to provide the backlight element 132.

2 and FIG. 3, FIG. 2 is a plan view showing the plane distribution of the first elastic body and the second elastic body of the pressure sensor of FIG. 1, and FIG. 3 is the pressure sensor 140 of FIG. 2 at III-III. Schematic diagram of the structure at the line position. Only one embodiment of the plane distribution of the pressure sensor 140 is shown in FIG. 2 . It can be understood that the number of the pressure sensors 140 is set according to actual needs, so that the touch can be sensed at various positions as much as possible. pressure. Each of the pressure sensors 140 includes a first electrode 141, a second electrode 142 disposed opposite the first electrode 141 (see FIG. 3), and at least between the first electrode 141 and the second electrode 142. A first elastomer 143 and at least a second elastomer 144. The first elastic body 143 and the second elastic body 144 have different resilience. Sensing the magnitude of the force applied to the touch display surface 100 by the elastic change of the first elastic body 143 and the second elastic body 144 and converting the force into a corresponding electrical signal, the electronic device 1 according to the Electrical signals perform functions such as touching a lock or opening an application.

The second elastic body 144 is stronger than the first elastic body 143, and the first elastic body 143 is more susceptible to deformation than the second elastic body 144. Among them, the resilience refers to the ability of the object to quickly return to its original shape after the external force that causes the deformation of the object is removed. The at least one first elastic body 143 and the at least one second elastic body 144 are disposed side by side between the first electrode 141 and the second electrode 142 to support the first electrode 141 and the second electrode 142. Preferably, a second elastic body 144 is disposed between the adjacent two first elastic bodies 143. In the pressure sensor 140 of the embodiment, the number of the at least one first elastic body 143 is four, and the number of the at least one second elastic body 144 is four. When the touch panel 120 is touch-operated, the first elastic body 143 and the second elastic body 144 are elastically deformed, but the shape of the first elastic body 143 is larger than the shape of the second elastic body 144. variable. The second elastic body 144 is used to prevent the first elastic body 143 from being excessively deformed and functions as an auxiliary support. In addition, the second elastic body 144 also helps to slow the elastic fatigue of the first elastic body 143 in multiple uses. And affect the detection effect. The first elastic body 143 may select, for example, one of a foam, a gasket, a cushion, an adhesive tape, and a rubber sheet. Preferably, the first elastic body 143 of the present embodiment is a foam.

In the embodiment, the number of the pressure sensors 140 is one, the first electrode 141 is covered with the back surface area of the touch panel 120 corresponding to the non-touch display area 100b, and the second electrode 142 and the first An electrode 141 correspondingly covers the second portion 151b of the housing 150. Specifically, the second electrode 142 is disposed on a plane defined by the step structure of the sidewall 151, wherein the height of the second portion 151b can be adjusted according to the overall thickness of the pressure sensor 13 without the electronic device The overall thickness of 1 is affected by the thickness of the pressure sensor 13. At this time, the four corners of the touch display unit 10 are respectively provided with a first elastic body 143, and a second elastic body 144 is disposed between the two first elastic bodies 143, as shown in FIG. 2 . The contact area of each of the first elastic bodies 143 and the first electrode 141 is greater than the contact area of each of the second elastic bodies 144 and the first electrode 141. In other modified embodiments, the electronic device 1 may also be provided with a plurality of the pressure sensors 140. The plurality of pressure sensors 140 are spaced apart from the touch panel of the non-touch display area 100b. 120 is away from the side of the touch display surface 100. The plurality of first electrodes 141 corresponding to the plurality of pressure sensors 140 are disposed at intervals, and the plurality of second electrodes 142 are respectively disposed opposite to the plurality of first electrodes 141, and the first electrodes 141 and the second electrodes 142 are oppositely disposed. At least one first elastic body 143 and at least one second elastic body 144 are sandwiched between each other. For example, four pressure sensors 140 are respectively disposed at four corners of the back surface of the touch panel 120. It can be understood that a plurality of pressure sensors 140 are disposed when the plurality of first electrodes 141 are disposed. When the leads are on the same side, the plurality of first electrodes 141 are spaced apart from each other at a position where the leads are not disposed, so that the space is utilized and the wiring of the leads is not affected. In addition, the first and second elastic bodies 143 and 144 may be arranged in such a manner that one or more of the first elastic bodies 143 are disposed around each of the second elastic bodies 144.

In the above embodiment, the first electrode 141 may be formed of a metal conductive material, such as Indium Tin Oxide (ITO), Silver Nanowire (SNW), Carbon Nanotube (CNT). ) and other materials are patterned. The first electrode 141 can be connected to a flexible circuit board through lead wires (not shown) to output the pressure signal of the pressure sensor 140 to an external circuit for operation. The flexible circuit board connected to the pressure sensor 140 and the flexible circuit board connected to the touch panel 120 can share a flexible circuit board, so that it is not necessary to add a flexible circuit board specifically for the pressure sensor 140. The second electrode 142 can be formed by printing a conductive paste (such as silver paste) or a conductive ink on the second portion 151b of the housing 150.

In a modified embodiment, as shown in FIG. 4, the width of the non-touch display area 110b of the cover 110 is greater than the width of the non-sensing area of the touch panel 120, thereby exposing a portion of the end of the cover 110. The pressure sensor 140 is disposed between the exposed end of the cover plate 110 and the second portion 151b of the side wall 151. The first electrode 141 is formed on a side of the cover 110 away from the touch display surface 100 and corresponds to the non-touch display area 100b. The second electrode 142 is formed on the second portion 151b.

Referring to FIG. 5, a schematic diagram of another distribution position of the pressure sensor 140 in the electronic device 1 is described. The pressure sensor 140 is sandwiched between the display panel 131 and the housing 150 corresponding to the non-touch display area 110b. For example, the non-touch display area 110b is disposed between the display panel 131 and the second portion 151b. . The first electrode 141 is formed on the back surface of the display panel 131 and corresponds to the non-touch display area 100b. The second electrode 142 is formed on the second portion 151b.

Referring to FIG. 6, a schematic diagram of another distribution position of the pressure sensor 140 in the electronic device 1 is described. The pressure sensor 140 is disposed between the backlight element 132 and the housing 150 corresponding to the non-touch display area 110b. The corresponding non-touch display area 110b is disposed between the backlight element 132 and the bottom wall 152 of the housing. between. Specifically, the first electrode 141 is formed on a side of the back plate of the backlight element 132 away from the display panel 131 and corresponds to the non-touch display area 100b. It can be understood that when the first electrode 141 is formed on the back surface of the backlight element 132, the second electrode 142 can be directly formed on the inner surface of the bottom wall 152 of the housing 150.

In each of the above embodiments, each of the pressure sensors 140 is a capacitive pressure sensor 140. When the touch display area 100a has a touch action, the first elastic body 143 and the second elastic body 144 are deformed by the touch pressing force, and between the first electrode 141 and the second electrode 142. The spacing varies accordingly, causing a change in the capacitance between the first electrode 141 and the second electrode 142. The external control circuit determines the pressing force generated on the touch panel 120 according to the amount of change in the capacitance between the first electrode 141 and the second electrode 142.

Alternatively, as shown in FIG. 7 , the pressure sensor 140 in each of the above embodiments may also be a resistive pressure sensor 140 . At this time, the first elastic body 143 is provided with conductive particles 145. For example, a plurality of conductive particles 145 may be uniformly doped in the first elastic body 143, so that the first elastic body 143 has conductivity. The second elastic body 144 may be selectively provided with or without conductive particles 145, and may be specifically determined according to actual needs. When the touch display area 100a has a touch pressing action, the first elastic body 143 and the second elastic body 144 are elastically deformed by the touch pressing force, so that the conductive particles 145 are replaced by the first elastic body 143. The second elastic body 144 is pressed and deformed to contact each other to electrically conduct the first electrode 141 and the second electrode 142. The contact area between the conductive particles 145 changes due to the change of the touch pressure, thereby causing a change in the contact resistance value between the conductive particles 145, and the external control circuit can calculate the touch panel 120 according to the change amount of the contact resistance value. The amount of pressing force generated on it.

Please refer to FIG. 8. FIG. 8 is a cross-sectional structural diagram of an electronic device 2 according to a second embodiment of the present invention. The electronic device 2 of the present invention may be a touch display device such as a mobile phone, a computer, a game machine, or a television. The electronic device 2 includes a touch display unit 20 , at least one pressure sensor 240 , and a housing 250 . The touch display unit 20 has a touch display surface 200. The touch display surface 200 defines a touch display area 200a and a non-touch display area 200b surrounding the touch display area 200a. The at least one pressure sensor 240 is disposed on a side of the touch display unit 20 away from the touch display surface 200, and is located between the touch display unit 20 and the housing 250 corresponding to the non-touch display area 200b. Settings. The housing 250 includes at least two side walls 251 and a bottom wall 252 connecting the at least two side walls 251. The at least two side walls 251 and the bottom wall 252 together form a receiving cavity 253 for receiving the touch display unit 20 and the at least one pressure sensor 240. In this embodiment, the housing 250 includes four side walls 251 connected end to end. The four side walls 251 and the bottom wall 252 together define the receiving cavity 253.

The touch display unit 20 further includes a cover 210, a touch panel 220, and a display module 230. The cover 210 is disposed on the touch panel 220 for protection. The cover plate 210 can be made of transparent glass, film, plastic, flexible material, or the like. The touch panel 220 is disposed on the display module 230, and has a sensing area (not shown) and a non-sensing area (not shown) surrounding the sensing area, the sensing area and the touch The control display area 200a corresponds to the non-touch display area 200b. The sensing area of the touch panel 220 is formed with a sensing electrode structure (not shown) for sensing a touch operation to generate a touch signal, and the non-sensing area is formed with a plurality of leads (not shown). The plurality of leads are used to electrically connect the sensing electrode structure to a flexible printed circuit (FPC) (not shown) to transmit the touch signal to the external control circuit through the FPC.

The display module 230 further includes a display panel 231, a plastic frame 233, and a backlight element 232. The plastic frame 233 is used to fix the display panel 231 and the backlight element 232. The backlight element 232 can further include an optical film set, a light guide plate, a light source, a reflective sheet, and a back sheet (not shown). The optical film set, the light guide plate, the reflective sheet and the back plate are sequentially stacked, and the light source is disposed on one side of the light guide plate. The optical film set, the light guide plate, the light source and the reflective sheet are fixed by the plastic frame 233, and the plastic frame 233 is further used to carry the touch panel 220. The back plate is disposed under the reflective sheet and covers the reflective sheet and the plastic frame 233 to carry the components of the backlight element 232. The plastic frame 233 includes at least two opposite side plates 2330. Each of the side plates 2330 includes a first step portion 2330a and a second step portion 2330b. The first step portion 2330a and the second step portion 2330b form a stepped structure. The distance between the second step portion 2330b and the bottom wall 252 of the housing 250 is closer than the distance between the first step portion 2330a and the bottom wall 252 of the housing 250, wherein the second step portion 2330b is used to carry the pressure. The sensor 23 is adjusted in height according to the thickness of the pressure sensor 23 such that the overall thickness of the electronic device 2 is not affected by the thickness of the pressure sensor 23. It can be understood that the display module 230 can also be a self-luminous display module, such as an organic electroluminescence display (OLED), without the need to provide the backlight element 232.

Please refer to FIG. 9 together. FIG. 9 is a schematic structural view of the pressure sensor of FIG. The number of the pressure sensors 240 is set according to actual needs, so as to enable the touch pressure to be sensed at each position as much as possible. Each of the pressure sensors 240 includes a first electrode 241, a second electrode 242 disposed opposite the first electrode 241, and at least a first elastic body 243 between the first electrode 241 and the second electrode 242. And at least a second elastomer 244. The first elastic body 243 and the second elastic body 244 have different resilience. Sensing the magnitude of the force applied to the touch display surface 200 by the elastic change of the first elastic body 243 and the second elastic body 244 and converting the force into a corresponding electrical signal, the electronic device 2 according to the Electrical signals perform functions such as touching a lock or opening an application.

The second elastic body 244 is stronger than the first elastic body 243, and the first elastic body 243 is more susceptible to deformation than the second elastic body 244. Among them, the resilience refers to the ability of the object to quickly return to its original shape after the external force that causes the deformation of the object is removed. The at least one first elastic body 243 and the at least one second elastic body 244 are disposed side by side between the first electrode 241 and the second electrode 242 to support the first electrode 241 and the second electrode 242. Preferably, a second elastic body 244 is disposed between the adjacent two first elastic bodies 243. When the touch panel 220 is touch-operated, the first elastic body 243 and the second elastic body 244 are elastically deformed, and the deformation amount of the first elastic body 243 is larger than the deformation amount of the second elastic body 244. . The second elastic body 244 is used to prevent the first elastic body 243 from being excessively deformed and functions as an auxiliary support. In addition, the second elastic body 244 also helps to slow the elastic fatigue of the first elastic body 243 in multiple uses. And affect the detection effect. The first elastic body 243 may select, for example, one of a foam, a gasket, a cushion, an adhesive tape, and a rubber sheet. Preferably, the first elastic body 243 of the present embodiment is a foam.

In this embodiment, the first sensor 241 is disposed on the back surface of the touch panel 220 corresponding to the position of the non-touch display area 200b, and the second electrode 242 and the first The electrode 241 correspondingly covers the top surface of the second step portion 2330b of the plastic frame 233. At this time, a first elastic body 243 is disposed at each of the four corners of the touch display unit 20, and a second elastic body 244 is disposed between the two first elastic bodies 243. The contact area of each of the first elastic bodies 243 and the first electrode 241 is greater than the contact area of each of the second elastic bodies 244 and the first electrode 241. In other embodiments, the plurality of pressure sensors 240 are spaced apart from one side of the touch panel 220 away from the touch display surface 200, for example, four of the pressure sensors 240 are respectively The four corners of the back of the touch panel 220 are disposed. It can be understood that, in the case where a plurality of pressure sensors 240 are disposed, when the plurality of first electrodes 241 are disposed on the same side of the leads, the plurality of first electrodes 241 are spaced apart from each other at a position where the leads are not disposed. To make full use of the space without affecting the wiring of the lead. In addition, the first and second elastic bodies 243 and 244 may be arranged in such a manner that one or more of the first elastic bodies 243 are surrounded by each of the second elastic bodies 244.

In the embodiment, the first electrode 241 is formed on a side of the touch panel 220 away from the touch display surface 200 and corresponds to the non-touch display area 200b. The second electrode 242 is formed on the plastic frame 233. The top surface of the second step portion 2330b is described. The first electrode 241 can be formed of a metal conductive material, for example, by using one of Indium Tin Oxide (ITO), Silver Nanowire (SNW), and Carbon Nano Tube (CNT). .

The first electrode 241 can be connected to a flexible circuit board through lead wires (not shown) to output the touch pressure signal of the pressure sensor 240 to an external circuit for calculation. The flexible circuit board connected to the pressure sensor 240 and the flexible circuit board connected to the touch panel 220 can share a flexible circuit board, so that it is not necessary to add a flexible circuit board to the pressure sensor 240. The second electrode 242 can be formed, for example, by printing a conductive paste (such as silver paste) or a conductive ink on the second step portion 2330b of the plastic frame 233.

In a modified embodiment, the pressure sensor 240 is disposed between the cover plate 210 and the second step portion 2330b. The first electrode 241 is formed on the cover plate 210 away from the touch display. One side of the face 200 and corresponding to the non-touch display area 200b, the second electrode 242 is formed on the surface of the second step portion 2330b.

Each of the pressure sensors 240 in each of the above embodiments is a capacitive pressure sensor 240. When the touch display area 200a has a touch action, the first elastic body 243 and the second elastic body 244 are deformed by the touch pressing force, and between the first electrode 241 and the second electrode 242. The pitch changes accordingly, causing a change in the capacitance between the first electrode 241 and the second electrode 242. The external circuit calculates the pressing force generated on the touch panel 220 according to the amount of change in the capacitance between the first electrode 241 and the second electrode 242.

Optionally, each of the pressure sensors 240 in each of the above embodiments may also be a resistive pressure sensor 240. At this time, the first elastic body 243 is provided with conductive particles, for example, a plurality of conductive particles may be uniformly doped in the first elastic body 243, so that the first elastic body 243 has conductive properties. The second elastic body 244 may be selectively provided with or without conductive particles, and may be specifically determined according to actual needs. When the touch display area 200a has a touch-pressing action, the first elastic body 243 and the second elastic body 244 are elastically deformed by the touch pressing force, thereby causing the first elastic body 243 and the first elastic body 243 to be disposed. The contact resistance value between the conductive particles in the second elastic body 244 is changed, and the external circuit can calculate the pressing force generated on the touch panel 220 according to the change amount of the contact resistance value.

Please refer to FIG. 10 at the same time. FIG. 10 is a cross-sectional structural diagram of an electronic device 3 according to a third embodiment of the present invention. The electronic device 3 of the present invention may be a touch display device such as a mobile phone, a computer, a game machine, or a television. The electronic device 3 includes a touch display unit 30, at least one pressure sensor 340, and a housing 350. The touch display unit 30 has a touch display surface 300. The touch display surface 300 defines a touch display area 300a and a non-touch display area 300b surrounding the touch display area 300a. The at least one pressure sensor 340 is disposed on a side of the touch display unit 30 away from the touch display surface 300 and corresponding to the non-touch display area 300b. The housing 350 includes at least two side walls 351 and a bottom wall 252 connecting the at least two side walls 351. The at least two side walls 351 and the bottom wall 252 together form a receiving cavity 353 for receiving the touch display unit 30 and the at least one pressure sensor 340. In this embodiment, the housing 350 includes four side walls 351 connected end to end. The four side walls 351 and the bottom wall 252 together define the receiving cavity 353.

The touch display unit 30 further includes a cover 310, a touch panel 320 and a display module 330. The cover 310 is disposed on the touch panel 320 for protection. The cover plate 310 can be made of transparent glass, film, plastic, flexible material, or the like. The touch panel 320 is disposed on the display module 330, and has a sensing area 320a and a non-sensing area 320b surrounding the sensing area 320a. The sensing area 320a corresponds to the touch sensing area 320a. The non-sensing area 320b corresponds to the non-touch sensing area 320a. The display module 330 further includes a display panel 331 and a backlight element 332 for providing a backlight required for the display panel 331 to display a picture.

The touch panel 320 further includes a first sensing layer 321 and a second sensing layer 322 disposed in a stack. A first sensing electrode (not shown) is formed on the sensing region 320a of the first sensing layer 321 . The non-sensing region 320b of the first sensing layer 321 is formed with a connection connecting the first sensing electrode. The first lead (not shown). A second sensing electrode (not shown) is formed on the sensing region 320a of the second sensing layer 322, and the non-sensing region 320b of the second sensing layer 322 is formed with the first The second lead of the second sensing electrode is connected (not shown). The first sensing electrode and the second sensing electrode are perpendicular to each other and insulated from each other. The first sensing electrode and the second sensing electrode are used to sense a touch operation to generate a touch signal. The first lead and the second lead are respectively used for electrically connecting the first sensing electrode and the second sensing electrode to a flexible printed circuit (FPC) (not shown) to The touch signal is transmitted to the external control circuit through the FPC.

Please refer to FIG. 11 together. FIG. 11 is a schematic structural diagram of the pressure sensor 340 of FIG. The number of the pressure sensors 340 is set according to actual needs, so as to enable the touch pressure to be sensed when touched at each external position. Each of the pressure sensors 340 includes a first electrode 341, a second electrode 342 disposed opposite the first electrode 341, and at least a first elasticity between the first electrode 341 and the second electrode 342. Body 343 and at least one second elastomer 344. The first elastic body 343 and the second elastic body 344 have different resilience. Sensing the magnitude of the force applied to the touch display surface 300 by the elastic change of the first elastic body 343 and the second elastic body 344 and converting the force into a corresponding electrical signal, the electronic device 3 according to the Electrical signals perform functions such as touching a lock or opening an application.

The second elastic body 344 has a greater resilience than the first elastic body 343, and the first elastic body 343 is more susceptible to deformation than the second elastic body 344. Among them, the resilience refers to the ability of the object to quickly return to its original shape after the external force that causes the deformation of the object is removed. The at least one first elastic body 343 and the at least one second elastic body 344 are disposed side by side between the first electrode 341 and the second electrode 342 to support the first electrode 341 and the second electrode 342. Preferably, a second elastic body 344 is disposed between the adjacent two first elastic bodies 343. When the touch panel 320 is touch-operated, the first elastic body 343 and the second elastic body 344 are elastically deformed, but the shape of the first elastic body 343 is larger than the shape of the second elastic body 344. variable. The second elastic body 344 is used to prevent the first elastic body 343 from being excessively deformed and functions as an auxiliary support. In addition, the second elastic body 344 also helps to slow the elastic fatigue of the first elastic body 343 in multiple uses. And affect the detection effect. The first elastic body 343 may select, for example, one of a foam, a gasket, a cushion, an adhesive tape, and a rubber sheet. The first elastic body 343 of this embodiment is a foam.

In this embodiment, the pressure sensor 340 is provided with one, and the first electrode 341 and the second electrode 342 respectively cover the circumferential sides of the first sensing layer 321 and the second sensing layer 322. The area of the sensing area 320b. At this time, a first elastic body 343 is disposed on each of the four corners of the touch display unit 30, and a second elastic body 344 is disposed between the two first elastic bodies 343. The contact area of each of the first elastic bodies 343 and the first electrode 341 is larger than the contact area of each of the second elastic bodies 344 and the first electrode 341.

In another embodiment, the pressure sensor 340 may be disposed in plurality, for example, a plurality of pressure sensors 340 are respectively disposed in the plurality of corners corresponding to the non-sensing area 320b in the touch panel 320. Specifically, the plurality of first electrodes 341 of the plurality of pressure sensors 340 are spaced apart from each other in a region corresponding to the first sensing 321 and the non-sensing region 320b, and the plurality of second electrodes 342 are respectively associated with the plurality of An electrode 341 is correspondingly disposed on the circumferential side of the second sensing layer 322. It can be understood that, in the case where a plurality of pressure sensors 340 are disposed, when the plurality of first electrodes 341 are disposed on the same side as the first leads or the plurality of second electrodes 342 are disposed on the same same as the second leads On one side, the plurality of first and second electrodes 341 and 342 are respectively spaced apart from each other at positions where the first and second leads are not disposed, so as to fully utilize the space without affecting the wiring of the first and second leads. The first and second elastic bodies 343 and 344 may be arranged in such a manner that one or more of the first elastic bodies 343 are surrounded by each of the second elastic bodies 344.

In this embodiment, the first electrode 341 is formed on a side of the first sensing layer 321 away from the touch display surface 300 and corresponds to the non-sensing area 320b. The second electrode 342 is formed on the second sensing layer. The layer 322 is adjacent to one side of the touch display surface 300 and corresponds to the non-sensing area 320b. The first electrode 341 and the second electrode 342 are oppositely disposed. The first electrode 341 is formed of a metal conductive material, and can be formed by, for example, using one of Indium Tin Oxide (ITO), Silver Nanowire (SNW), or Carbon Nanotube (CNT). . The second electrode 342 can be made of the same material as the first electrode 341, or can be made of different materials. It can be understood that the first electrode 341 and the second electrode 342 can be simultaneously formed in the same conductive material layer with the first lead and the second lead, respectively.

The first electrode 341 and the second electrode 342 can be connected to a flexible circuit board through lead wires (not shown) to output the touch pressure signal of the pressure sensor 340 to an external circuit for calculation. The flexible circuit board connected to the pressure sensor 340 and the flexible circuit board connected to the touch panel 320 can share a flexible circuit board, so that it is not necessary to add a flexible circuit board specifically for the pressure sensor 340. The second electrode 342 can be formed, for example, by printing a conductive paste (such as silver paste) or a conductive ink on the housing 350.

The pressure sensor 340 is a capacitive pressure sensor 340. When the touch action is generated on the touch display area 300a, the first elastic body 343 and the second elastic body 344 are deformed by the touch pressing force, and the first electrode 341 and the second electrode 342 are The spacing between the first electrode 341 and the second electrode 342 is changed, and the amount of change between the capacitance between the first electrode 341 and the second electrode 342 is calculated. The pressing force generated by the touch panel 320 is generated.

In other implementations, the pressure sensor 340 can also be a resistive pressure sensor 340. At this time, the first elastic body 343 is provided with conductive particles, for example, a plurality of conductive particles may be uniformly doped in the first elastic body 343, so that the first elastic body 343 has conductive properties. The second elastic body 344 may be selectively provided with or without conductive particles, and may be specifically determined according to actual needs. When the touch display area 300a has a touch action, the first elastic body 343 and the second elastic body 344 are elastically deformed by the touch pressing force, thereby causing the first elastic body 343 and the first elastic body 343 to be disposed. The contact resistance value of the conductive particles in the second elastic body 344 is changed, and the pressing force generated on the touch panel 320 is calculated according to the amount of change in the contact resistance value.

In the above embodiments of the present invention, the pressure sensor is disposed in a region corresponding to the non-touch display area. When the thickness of the existing electronic device is standardized, the non-touch display area can be fully utilized for the non-touch display area. The space for transmitting the lead of the signal does not increase the thickness of the entire electronic device, and facilitates the development of multifunctionality of the electronic device.

In summary, the creation meets the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be equivalently modified or changed according to the spirit of the present invention. It should be covered by the following patent application.

1,2,3‧‧‧Electronic devices

10,20,30‧‧‧Touch display unit

100,200,300‧‧‧ touch display surface

100a, 200a, 300a‧‧‧ touch display area

100b, 200b, 300b‧‧‧ non-touch display area

110,210,310‧‧‧ cover

120,220,320‧‧‧ touch panel

320a‧‧‧Sensing area

320b‧‧‧non-sensing area

321‧‧‧First sensing layer

322‧‧‧Second sensing layer

130,230,330‧‧‧ display module

131,231,331‧‧‧ display panel

132,232,332‧‧‧ Backlight components

233‧‧‧ plastic frame

2330‧‧‧ side panels

2330a‧‧‧First Step

2330b‧‧‧second step

140,240,340‧‧‧pressure sensor

141,241,341‧‧‧first electrode

142,242,342‧‧‧second electrode

143,243,343‧‧‧First Elastomer

144,244,344‧‧‧Second elastomer

145‧‧‧ conductive particles

150, 250, 350 ‧ ‧ shell

151,251,351‧‧‧ side wall

151a‧‧‧Part 1

151b‧‧‧Part II

152,252,352‧‧‧ bottom wall

153,253,353‧‧‧ containment chamber

no

1‧‧‧Electronic device

10‧‧‧Touch display unit

100‧‧‧Touch display surface

100a‧‧‧Touch display area

100b‧‧‧ non-touch display area

110‧‧‧ cover

120‧‧‧Touch panel

130‧‧‧Display module

131‧‧‧ display panel

132‧‧‧Backlight components

140‧‧‧pressure sensor

150‧‧‧shell

151‧‧‧ side wall

151a‧‧‧Part 1

151b‧‧‧Part II

152‧‧‧ bottom wall

153‧‧‧ containment chamber

Claims (14)

An electronic device includes: a touch display unit having a touch display surface, the touch display surface defining a touch display area and a non-touch display area surrounding the touch display area; wherein the electronic device Also includes:
The at least one pressure sensor is disposed on a side of the touch display unit that is away from the touch display surface, and is disposed corresponding to the non-touch display area, each of the pressure sensors includes at least one first elastic body and at least a second elastic body having a different resilience to the second elastic body, and the elastic change of the first elastic body and the second elastic body is applied to the touch display surface The magnitude of the force converts the force into a corresponding electrical signal, and the electronic device performs a corresponding function based on the electrical signal. The electronic device of claim 1, wherein each of the pressure sensors is a capacitive pressure sensor, each of the capacitive pressure sensors further comprising a first electrode and a second electrode disposed opposite to each other, The at least one first elastic body and the at least one second elastic body are disposed between the first electrode and the second electrode. The electronic device of claim 1, wherein each of the pressure sensors is a resistive pressure sensor, each of the resistive pressure sensors further comprising a first electrode and a second electrode disposed opposite to each other, The at least one first elastic body and the at least one second elastic body are disposed between the first electrode and the second electrode, and at least the first elastic body is disposed in the first elastic body and the second elastic body There are conductive particles. The electronic device of claim 1, wherein the touch display unit further comprises a cover plate, a touch panel, a display panel and a backlight component, wherein a surface of the cover is the touch Display surface. The electronic device of claim 4, wherein the touch panel comprises a first sensing layer and a second sensing layer, the at least one pressure sensor being located at the first sensing layer and the second sensing layer Between and corresponding to the non-touch display area settings. The electronic device of claim 4, wherein the at least one pressure sensor is disposed on a surface of the cover plate away from the touch display surface. The electronic device of claim 4, wherein the at least one pressure sensor is disposed on a surface of the display panel away from the touch display surface. The electronic device of claim 4, wherein the at least one pressure sensor is formed on a surface of the backlight element away from the touch display surface. The electronic device of claim 4, wherein the touch display unit further comprises a plastic frame fixed to the display panel and the periphery of the backlight element, the plastic frame comprising at least two opposite side plates, the at least one pressure sensing The device is formed on a surface of the side panel. The electronic device of claim 1, wherein the electronic device further comprises a casing, the casing comprising at least two side walls and a bottom wall connecting the at least two side walls, the at least two side walls and the bottom wall jointly forming a The receiving cavity is configured to receive the touch display unit and the at least one pressure sensor, and the at least one pressure sensor is located between the housing and the touch display unit. The electronic device of claim 1, wherein the number of the at least one pressure sensor is plural, and the plurality of pressure sensors are spaced apart. The electronic device of claim 1, wherein the first elastic body has a rebound resilience smaller than a resilience of the second elastic body. The electronic device of claim 2 or 3, wherein the number of the at least one pressure sensor is one, and the first electrode is continuously disposed to fill the touch display unit side corresponding to the non-touch display area Area. The electronic device of claim 2 or 3, wherein a contact area of the first elastic body with the first electrode is greater than a contact area of the second elastic body with the first electrode.