CN106774948B - Touch screen and electronic device - Google Patents

Abstract

The invention discloses a touch screen which comprises a touch feedback electrode layer, a touch electrode layer, a processor, a first circuit and a second circuit. The tactile feedback electrode layer is used for providing electric tactile feedback for a user; the touch electrode layer is arranged on the touch feedback electrode layer and is used for acquiring a control position signal; the processor is used for controlling the touch screen to at least provide a first operation and a second operation, the first operation is used for realizing suspension operation according to the control position signal, and the second operation is used for controlling the tactile feedback electrode layer to provide electrotactile feedback; the first circuit is used for electrically connecting the processor and the touch electrode layer; the second circuit is used for electrically connecting the processor and the tactile feedback electrode layer; when the touch screen provides a first operation, the touch electrode layer obtains a control position signal; when the touch screen provides a second operation, the tactile feedback electrode layer generates an oscillating electric field to the human body so as to generate electrotactile sensation to the human body. The invention also discloses an electronic device.

Description

Touch screen and electronic devices

Technical Field

The present invention relates to the technical field of consumer electronics, and in particular to a touch screen and an electronic device.

Background technique

In some cases, such as when driving a car, when the touch device needs to perform simple switch or page turning operations, the driver hopes to be able to perform floating operations (i.e., not touch the touch screen); in other cases, when the touch device needs to be operated blindly, the driver hopes that the touch operation can produce an electric tactile feedback effect. Currently, there is no touch device that can have both floating control function and electric tactile feedback function.

Summary of the invention

The invention provides a touch screen and an electronic device.

A touch screen according to an embodiment of the present invention comprises:

A tactile feedback electrode layer, used to provide electrotactile feedback to the user;

A touch electrode layer, disposed on the tactile feedback electrode layer, the touch electrode layer being used to obtain a manipulation position signal;

a processor, configured to control the touch screen to provide at least a first operation and a second operation, wherein the first operation is configured to implement a hovering operation according to the manipulation position signal, and the second operation is configured to control the tactile feedback electrode layer to provide electrotactile feedback;

a first circuit, the first circuit being used to electrically connect the processor and the touch electrode layer; and

a second circuit, the second circuit being used to electrically connect the processor and the tactile feedback electrode layer;

When the touch screen provides the first operation, the processor is electrically connected to the touch electrode layer through the first circuit, and the touch electrode layer obtains the manipulation position signal;

When the touch screen provides the second operation, the processor is electrically connected to the tactile feedback electrode layer through the second circuit, and the tactile feedback electrode layer generates an oscillating electric field to the human body so that the human body generates an electric touch.

In some embodiments, the touch electrode layer includes a plurality of touch electrode blocks arranged at intervals and a plurality of electrode leads electrically connected to each touch electrode block, and the plurality of electrode leads are electrically connected to the processor.

In some embodiments, the touch screen includes a shielding layer arranged on the touch electrode layer, the shielding layer includes a plurality of conductive blocks or a plurality of insulating blocks corresponding to the plurality of touch electrode blocks and a lead shielding block arranged at intervals from the plurality of conductive blocks or the plurality of insulating blocks, and the processor is electrically connected to the shielding layer through the second circuit;

When the processor controls the touch screen to provide a first operation, the processor controls the shielding layer to be grounded;

When the processor controls the touch screen to provide a second operation, the processor is electrically connected to the shielding layer through the second circuit.

In certain embodiments, if the processor controls the touch screen to provide the first operation, the processor is electrically connected to the touch electrode layer through the first circuit, and the processor controls the tactile feedback electrode layer to be grounded through the second circuit. When the human body operates the touch screen, the touch electrode layer and the human body form a touch capacitor, and the touch capacitor is used to obtain the control position signal generated when the user operates the touch screen.

In some embodiments, if the processor controls the touch screen to provide a second operation, the processor is electrically connected to the tactile feedback electrode layer through the second circuit, and the processor controls the electrical connection of the touch electrode layer through the first circuit. When the human body operates the touch screen, the electric tactile feedback electrode layer forms a tactile feedback capacitor with the human body, and the tactile feedback capacitor is used to generate an oscillating electric field to the human body to enable the human body to generate electric touch.

In some embodiments, the first circuit includes a controller electrically connected to the touch electrode layer, the controller is used to generate a position detection signal, and the time period of the position detection signal is a touch detection period; the second circuit includes a power supply, the power supply is used to generate a feedback detection signal, and the time period of the feedback detection signal includes a first detection period and a first intermittent period;

In the first detection cycle, the feedback detection signal can provide the electrotactile feedback to the human body;

If the touch detection period is shorter than the first intermittent period, within the first intermittent period, the processor is used to control the controller to generate the position detection signal and to detect the manipulation position signal.

In some embodiments, the first detection period includes a first sub-detection period and a first sub-interval period;

In the first sub-detection period, the feedback detection signal can provide the electrotactile feedback to the human body;

If the touch detection period is shorter than the first sub-interval period, within the first sub-interval period, the processor is used to control the controller to generate the position detection signal and to detect the manipulation position signal.

In some embodiments, the feedback detection signal includes a low-frequency component and a high-frequency component, the frequency of the low-frequency component is 10 Hz-500 Hz, and the frequency of the high-frequency component is 10 KHz-500 KHz.

In some implementations, the detection frequency corresponding to the touch detection period is 1000 Hz-1 MHz.

An electronic device according to an embodiment of the present invention includes the touch screen described in any one of the above embodiments.

The electronic device and touch screen of the embodiments of the present invention can provide an electric tactile feedback effect to the human body by setting a tactile feedback electrode layer on the touch screen and controlling the operation of the tactile feedback electrode layer through a processor, and can also provide a touch control electrode layer on the touch screen and control the operation of the touch control electrode layer through a processor to achieve a floating operation.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic plan view of an electronic device according to an embodiment of the present invention;

FIG2 is a schematic cross-sectional view of a touch screen according to an embodiment of the present invention;

FIG3 is a plan view of a tactile feedback electrode layer according to an embodiment of the present invention;

FIG4 is a schematic plan view of a touch electrode layer according to an embodiment of the present invention;

FIG5 is a schematic cross-sectional view of a touch screen according to another embodiment of the present invention;

FIG6 is a schematic structural diagram of a shielding layer according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a touch screen according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of voltage-time coordinates generated by a first circuit according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of voltage-time coordinates generated by a second circuit according to an embodiment of the present invention.

Description of main component symbols:

Electronic device 200, touch screen 100, cover 10, first surface 12, second surface 14, tactile feedback electrode layer 20, first substrate 22, third surface 222, fourth surface 224, tactile feedback electrode 24, tactile feedback electrode lead 26, touch electrode layer 30, second substrate 32, fifth surface 322, sixth surface 324, touch electrode block 34, electrode lead 36, processor 40, first circuit 50, second circuit 60, shielding layer 70, conductive block 72, insulating block 72, lead shielding block 74, connecting line 76.

Detailed ways

The embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements or elements with the same or similar functions.

In addition, the embodiments of the present invention described below in conjunction with the drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

1 , the electronic device 200 includes a touch screen 100. The electronic device 200 includes but is not limited to a mobile phone, a tablet computer, a smart watch, etc. This embodiment is described by taking the electronic device 200 as a mobile phone as an example.

2 , the touch screen 100 according to the embodiment of the present invention includes a cover plate 10 , a tactile feedback electrode layer 20 , a touch control electrode layer 30 , a processor 40 , a first circuit 50 and a second circuit 60 .

The cover plate 10 includes a first surface 12 and a second surface 14 facing each other. The cover plate 10 can be made of an organic material such as glass, sapphire, polymethylmethacrylate (PMMA), polycarbonate (PC), a mixture of PC and PMMA, or an insulating material with high surface hardness. The cross-section of the cover plate 10 of the embodiment of the present invention is a rectangular sheet structure. In other embodiments, the shape of the cover plate 10 is not limited to a rectangular sheet structure, and can also be a rectangular, triangular, circular, elliptical, hexagonal or other shape in cross-section.

Please refer to FIG. 2 and FIG. 3 , the tactile feedback electrode layer 20 includes a first substrate 22, a tactile feedback electrode 24, and a tactile feedback electrode lead 26. The first substrate 22 includes a third surface 222 and a fourth surface 224 opposite to each other, the tactile feedback electrode 24 and the tactile feedback electrode lead 26 are both disposed on the fourth surface 224, and the tactile feedback electrode lead 26 is electrically connected to the tactile feedback electrode 24. The third surface 222 of the first substrate 22 in the tactile feedback electrode layer 20 is bonded to the second surface 14 of the cover plate 10 by OCA (Optically Clear Adhesive, OCA) solid optical glue, OCR (Optical Clear Resin, OCR) liquid optical glue or other non-conductive optical glue. In some embodiments, the tactile feedback electrode 24 and the tactile feedback electrode lead 26 may also be disposed on the third surface 222. In this case, the tactile feedback electrode 24, the tactile feedback electrode lead 26 and the third surface 222 in the tactile feedback electrode layer 20 are bonded to the second surface 14 by OCA glue or OCR glue. The first substrate 22 may be made of materials such as PMMA and PC, and the shape of the first substrate 22 is consistent with the shape of the cover plate 10. The area of the tactile feedback electrode 24 is slightly smaller than the area of the first substrate 22. In other words, the tactile feedback electrode 24 does not completely cover the third surface 222 or the fourth surface 224 of the first substrate 22. The tactile feedback electrode 24 and the tactile feedback electrode lead 26 are both conductive coatings with a high resistance value formed by any one of zinc tin oxide, indium tin oxide, semi-conductive transparent polymer, zinc oxide, and silicon carbide. In other embodiments, the tactile feedback electrode layer 20 may also be made of other semiconductor materials. The tactile feedback electrode layer 20 is used to provide electrical tactile feedback to the user when the user operates the touch screen 100.

Please refer to FIG. 2 and FIG. 4 together. The touch electrode layer 30 includes a second substrate 32, a plurality of touch electrode blocks 34 and a plurality of electrode leads 36. Each electrode lead 36 is connected to a corresponding touch electrode block 34. The second substrate 32 includes a fifth surface 322 and a sixth surface 324 opposite to each other. The plurality of touch electrode blocks 34 and the plurality of electrode leads 36 are all arranged on the fifth surface 322 and each electrode lead 36 is electrically connected to a touch electrode block 34. Such an arrangement facilitates the touch screen 100 to find the touch electrode block 34 with a change in power according to the change in power received by the electrode leads 36, and obtain the touch position of the user operating the touch screen 100 according to the position of the touch electrode block 34. This structural design makes the touch electrode layer 30 less disturbed when detecting the touch position of the user operating the touch screen 100, so that the touch position detection is more sensitive and the distance of the floating operation is farther. At the same time, such a setting can set the area of the touch electrode block 34 to be relatively large. In some embodiments, when the touch electrode block 34 is used as the tactile feedback electrode 24, the tactile feedback electrode 24 can provide a larger and more delicate feedback area, that is, the entire screen can provide feedback effects as much as possible, and there will be no large-area breakpoints. Multiple touch electrode blocks 34 are arranged at intervals from each other. Specifically, multiple touch electrode blocks 34 are arranged in a rectangular array on the fifth surface 322. The second substrate 32 can be made of materials such as PMMA and PC, and the shape of the second substrate 32 is consistent with the shape of the cover plate 10. In some embodiments, multiple touch electrode blocks 34 can also be arranged on the fifth surface 322 or the sixth surface 324 in a ring array or other manner. The touch electrode block 34 and the motor lead 34 can be made of materials such as graphene, carbon nanotubes, transparent conductive polymers, indium tin oxide, etc. The touch electrode layer 30 is used to obtain the control position signal generated when the user operates the touch screen 100.

The processor 40 can be electrically connected to the tactile feedback electrode layer 20 and the touch electrode layer 30. The processor 40 is used to control the touch screen 100 to provide at least a first operation and a second operation. The first operation is used to control the touch screen 100 to implement a floating operation according to the manipulation position signal, and the second operation is used to control the tactile feedback electrode layer 20 to generate electric tactile feedback to the user. The floating operation can be understood as: when the user's finger is at a certain distance from the touch electrode layer 30, the touch screen 100 is operated to generate a manipulation position signal, and the processor 40 controls the touch screen 100 according to the manipulation position signal to implement the operation of the control electronic device 200.

The first circuit 50 is electrically connected to the processor 40 and the touch electrode layer 30. The first circuit 50 includes a controller electrically connected to the touch electrode layer 30, and the controller is used to generate a position detection signal. The position detection signal is transmitted from the first circuit 50 to the touch electrode layer 30 and is used to detect the manipulation position signal generated when the user operates the touch screen 100.

The second circuit 60 is used to be electrically connected to the processor 40 and the tactile feedback electrode layer 20. The second circuit 60 includes a power supply (not shown), which is used to generate a feedback detection signal. The feedback detection signal is transmitted from the second circuit 60 to the tactile feedback electrode layer 20 and is used to generate electrical tactile feedback to the human body.

If the processor 40 controls the touch screen 100 to provide a first operation, the processor 40 controls the first circuit 50 to electrically connect the processor 40 to the touch electrode block 34 through the first circuit 50 and the electrode lead 36. The processor 40 also controls the tactile feedback electrode layer 20 to be grounded through the second circuit 60. At this time, the tactile feedback electrode layer 20 acts as a shielding conductive layer under the touch electrode layer 30 to shield the influence of the parasitic capacitance formed by the display module (e.g., display screen) and the touch electrode layer 30 (touch electrode block 34) in the electronic device 200. When there is a position detection signal on the touch electrode layer 30 (touch electrode block 34) and the user does not operate the touch screen 100, the position detection signal on the touch electrode layer 30 (touch electrode block 34) remains unchanged. When there is a position detection signal on the touch electrode layer 30 (touch electrode block 34) and the user operates the touch screen 100, the human body and the touch electrode layer 30 (touch electrode block 34) form a touch capacitor (not shown), and the position detection signal on the touch electrode layer 30 (touch electrode block 34) changes. After the position detection signal changes, the touch electrode layer 30 (touch electrode block 34) and the touch capacitor obtain the control position signal generated when the user operates the touch screen 100. In this way, the processor 40 controls the touch screen 100 to implement the floating operation according to the control position signal. Specifically, when the user's finger or a part of the body is located on the first surface 12 of the cover plate 10 or is located on one side of the first surface 12 of the cover plate 10 and is at a certain distance from the first surface 12, the user's finger or a part of the body can form a touch capacitor with the touch electrode layer 30 (touch electrode block 34), and cause the position detection signal on the touch electrode layer 30 (touch electrode block 34) to change, thereby enabling the touch electrode layer 30 (touch electrode block 34) and the touch capacitor to obtain the control position signal generated when the user operates the touch screen 100.

If the processor 40 controls the touch screen 100 to provide a second operation, the processor 40 controls the second circuit 60 to electrically connect the processor 40 to the tactile feedback electrode 24 through the second circuit 60 and the tactile feedback electrode lead 26, and the processor 40 also controls the touch electrode layer 30 to be grounded through the first circuit 50. When there is a feedback detection signal on the tactile feedback electrode layer 20 (tactile feedback electrode 24) and the user does not operate the touch screen 100, the feedback detection signal on the tactile feedback electrode layer 20 (tactile feedback electrode 24) remains unchanged. When there is a feedback detection signal on the tactile feedback electrode layer 20 (tactile feedback electrode 24) and the user operates the touch screen 100, the human body and the tactile feedback electrode layer 20 (tactile feedback electrode 24) form a tactile feedback capacitor (not shown). At this time, since the tactile feedback electrode layer 20 (tactile feedback electrode 24) and the human body are the two poles of the tactile feedback capacitor, the electric charge on the human body is controlled by the feedback detection signal on the tactile feedback electrode layer 20 (tactile feedback electrode 24). If the feedback detection signal can change the electric charge on the human body and generate an oscillating electric field, the human body directly obtains electrotactile feedback. In this way, the tactile feedback electrode layer 20 (tactile feedback electrode 24) can directly provide electrotactile feedback to the human body.

The electronic device 200 and the touch screen 100 of the embodiment of the present invention can generate electric tactile feedback to the human body by setting a tactile feedback electrode layer 20 on the touch screen 100 and controlling the operation of the tactile feedback electrode layer 20 through the processor 40; and can realize the floating operation of the touch screen 100 by setting a touch electrode layer 30 on the touch screen 100 and controlling the operation of the touch electrode layer 30 through the processor 40. Secondly, when the processor 40 controls the touch screen 100 to provide the first operation, the processor 40 also controls the tactile feedback electrode layer 20 to be grounded through the second circuit 60 so that the tactile feedback electrode layer 20 shields the touch electrode layer 30, so that the touch electrode layer 30 and the touch capacitor have a higher recognition accuracy, and the distance at which the user operates the touch screen 100 is improved. When the processor 40 controls the touch screen 100 to provide a second operation, the processor 40 also controls the touch electrode layer 30 to be grounded through the first circuit 50 so that the touch electrode layer 30 shields the tactile feedback electrode layer 20. In this way, the tactile feedback electrode layer 20 and the tactile feedback capacitor have higher recognition accuracy, thereby enhancing the electrotactile effect produced by the tactile feedback electrode layer 20 on the human body.

Please refer to FIGS. 5-7 , in some embodiments, the touch screen 100 further includes a shielding layer 70, which is disposed between the cover plate 10 and the second substrate 32. Specifically, the tactile feedback electrode 24 and the tactile feedback electrode lead 26 are disposed on the fourth surface 324, and the shielding layer 70 is disposed on the third surface 322. The shielding layer 70 includes a plurality of conductive blocks 72 or a plurality of insulating blocks 72 corresponding to each touch electrode block 34, a lead shielding block 74 spaced apart from the conductive block 72 or the insulating block 72, and a connecting line 76 electrically connected to the lead shielding block 74 and the second circuit. Please refer to FIG. 6 , specifically, when the shielding layer 70 includes the conductive block 72, the tactile feedback electrode layer 20, the conductive block 72 and the human body form a tactile feedback capacitor, or the tactile feedback electrode layer 20 and the lead shielding block 74 and the human body form a tactile feedback capacitor. Such arrangement makes the spacing between the conductive blocks 72 as small as possible, so that when the finger slides on the screen, an ideal and uniform tactile feedback effect can be obtained, and there will be no screen breakpoints or no tactile feedback areas; at the same time, the conductive blocks 72 are arranged to make the display effect of the touch screen 100 more uniform; and avoid the color difference on the touch screen 100 caused by the lack of conductive blocks 72, thereby affecting the visual effect of the touch screen 100. In some embodiments, the conductive blocks 72 can be replaced by insulating blocks 72, that is, the shielding layer 70 includes insulating blocks 72; when the shielding layer 70 includes insulating blocks 72, the tactile feedback electrode layer 20 and the human body form a tactile feedback capacitor or the tactile feedback electrode layer 20 and the lead shielding block 74 and the human body form a tactile feedback capacitor.

If the processor 40 controls the touch screen 100 to provide a first operation, the processor 40 controls the first circuit 50 to electrically connect the processor 40 to the touch electrode block 34 through the first circuit 50 and the electrode lead 36, and the processor 40 also controls the second circuit 60 to connect the processor 40 to the ground through the second circuit 60 and the control tactile feedback electrode 24, the tactile feedback electrode lead 26, the lead shielding block 74 and the connecting line 76. When there is a position detection signal on the touch electrode layer 30 (touch electrode block 34) and the user does not operate the touch screen 100, the position detection signal on the touch electrode layer 30 (touch electrode block 34) remains unchanged. When there is a position detection signal on the touch electrode layer 30 (touch electrode block 34) and the user operates the touch screen 100, the human body and the touch electrode layer 30 (touch electrode block 34) form a touch capacitor (not shown) and change the position detection signal on the touch electrode layer 30 (touch electrode block 34). The change in the position detection signal enables the touch electrode layer 30 (touch electrode block 34) and the touch capacitor to obtain the control position signal generated when the user operates the touch screen 100. In this way, the processor 40 controls the touch screen 100 to implement the floating operation according to the control position signal. In this way, since the processor 40 controls the grounding of the tactile feedback electrode 24, the tactile feedback electrode lead 26, the lead shielding block 74 and the connecting line 76 through the second circuit 60, the tactile feedback electrode layer 20 and the shielding layer 70 can shield the electrode lead 36 on the touch electrode layer 30 from generating electrical interference and electromagnetic interference to the touch capacitor composed of the touch electrode block 34 and the human body, thereby further improving the detection accuracy of the touch capacitor for detecting the touch position and further improving the control distance of the floating operation of the touch screen 100.

If the processor 40 controls the touch screen 100 to provide a second operation, the processor 40 controls the second circuit 60 to electrically connect the processor 40 to the tactile feedback electrode 24, the tactile feedback electrode lead 26, the lead shielding block 74 and the connecting line 76 through the second circuit 60, and the processor 40 also controls the touch electrode layer 30 to be grounded through the first circuit 50. At this time, the tactile feedback electrode layer 20 and the shielding layer 70 form a tactile feedback capacitor with the human body, and the tactile feedback capacitor generates an oscillating electric field and generates electric tactile feedback in the human body according to the voltage change of the tactile feedback electrode layer 20 and the shielding layer 70. Since the touch electrode layer 30 is grounded when the touch screen 100 provides the second operation, the touch electrode layer 30 will not generate electrical or electromagnetic interference to the tactile feedback capacitor, thereby improving the sensing accuracy of the tactile feedback capacitor, and thus improving the electric tactile effect of the touch screen 100.

Please refer to FIG8 and FIG9. In some embodiments, the first circuit 50 includes a controller electrically connected to the touch electrode layer 30, and the controller is used to generate a position detection signal. The time period of the position detection signal is the touch detection period T1. In the touch detection period T1, the controller can generate a position detection signal and transmit it to the touch electrode layer 30. When the user operates the touch screen 100, the human body and the touch electrode layer 30 form a touch capacitor, which changes the position detection signal on the touch electrode layer 30 and enables the touch electrode layer 30 and the processor 40 to obtain a control position signal. The processor 40 controls the touch screen 100 to achieve a floating operation according to the control position signal. The second circuit 60 includes a power supply, which is used to generate a feedback detection signal. The time period of the feedback detection signal is the feedback detection period T2. The feedback detection period T2 includes a first detection period t1 that can generate an electric tactile signal to the human body and a first intermittent period t2 that cannot generate an electric tactile feedback signal to the human body. In the first detection cycle t1, the feedback detection signal generated by the power supply is transmitted to the tactile feedback electrode layer 20. When the user operates the touch screen 100, the tactile feedback electrode layer 20 and the human body form a tactile feedback capacitor. Under the action of the feedback detection signal, the human body generates an oscillating electric field and generates electric tactile feedback. In the first intermittent cycle t2, the feedback detection signal generated by the power supply is transmitted to the tactile feedback electrode layer 20. When the user operates the touch screen 100, the tactile feedback electrode layer 20 and the human body form a tactile feedback capacitor. At this time, the human body does not generate electric tactile feedback under the action of the feedback detection signal. In some embodiments, the power supply does not generate a voltage signal in the first intermittent cycle t2, that is, the feedback detection signal at this time is zero.

Please refer to Figures 8 and 9. In some embodiments, if the touch detection period T1 is less than the first intermittent period t2, the processor 40 controls the position detection signal generated by the controller during the first intermittent period t2 and is used to detect whether the user is performing a floating operation. In this way, there is no need for the processor 40 to control the second circuit 50 to disconnect the electrical connection with the tactile feedback electrode layer 20, and the touch electrode layer 30 can also be used to detect whether the user is performing a floating operation. When the power supply does not generate a voltage signal during the first intermittent period t2, the tactile feedback electrode layer 20 and the shielding layer 70 can also have a certain shielding effect on the electrode lead 36, ensuring that the touch screen 100 has the detection accuracy to detect the touch position.

In some embodiments, the first detection period t1 includes a first sub-detection period t12 that can generate an electric tactile signal to the human body and a first sub-interval period t14 that cannot generate an electric tactile feedback signal to the human body. In the first sub-detection period t12, the feedback detection signal generated by the power supply is transmitted to the tactile feedback electrode layer 20. When the user operates the touch screen 100, the tactile feedback electrode layer 20 and the human body form a tactile feedback capacitor. Under the action of the feedback detection signal, the human body generates an oscillating electric field and generates electric tactile feedback. In the first sub-interval period t14, the feedback detection signal generated by the power supply is transmitted to the tactile feedback electrode layer 20. When the user operates the touch screen 100, the tactile feedback electrode layer 20 and the human body form a tactile feedback capacitor. Under the action of the feedback detection signal, the human body does not generate electric tactile feedback. In some embodiments, the power supply does not generate a voltage signal in the first sub-interval period t14, that is, the feedback detection signal is zero at this time. In some embodiments, if the touch detection cycle T1 is less than the first sub-interval cycle t14, the processor 40 controls the controller to generate a detection signal in the first sub-interval cycle t14 and is used to detect whether the user is performing a hovering operation. In this way, there is no need for the processor 40 to control the second circuit 50 to disconnect the electrical connection with the tactile feedback electrode layer 20, and the touch electrode layer 30 can also be used to detect whether the user is performing a hovering operation. At the same time, the processor 40 controls the controller to generate and execute as many touch detection cycle signals as possible, so that the touch screen 100 can approximately realize real-time detection of whether the user is performing a touch operation.

In some embodiments, the feedback detection signal includes a low-frequency component and a high-frequency component, the frequency of the low-frequency component is 10Hz-500Hz, and the frequency of the high-frequency component is 10KHz-500KHz. Specifically, the frequency of the low-frequency component of 10Hz-500Hz is the most sensitive frequency that can be felt by the annular corpuscles of the human body to realize the sense of touch in tactile feedback; when the frequency of the low-frequency component is not within the range of 10Hz-500Hz, the effect of the electric tactile stimulation felt by the human body is not obvious. The high-frequency component is mainly used to modulate the low-frequency component. Under the action of the high-frequency component, since the frequency is higher than the frequency range of human hearing, it can prevent the user from hearing the noise generated by the device; at the same time, under the action of the high-frequency component, the feedback detection signal can reduce the influence of dirt and water vapor on the surface of the touch interface and can be used to enhance the effect of the electric tactile stimulation received by the human body; when the frequency of the feedback detection signal is not within the range of 10KHz-500KHz, the user will hear that the device generates noise and the effect of the electric tactile stimulation received by the user is not obvious. The detection frequency corresponding to the touch detection cycle is 1000Hz-1MHz. When the frequency corresponding to the touch detection cycle is 1000Hz-1MHz, the touch screen 100 can better detect the user's floating operation on the touch screen 100; at the same time, the touch frequency is greater than the frequency of the low-frequency component, which is convenient for setting the position detection to be executed in the gap between feedback detections, and then facilitating the feedback detection and position detection to be performed in real time; when the frequency corresponding to the touch detection cycle is not in the range of 10KHz-500KHz, the touch screen 100 detects that the user's floating operation on the touch screen 100 responds too quickly or too slowly, resulting in the inability to effectively identify the user's floating operation on the touch screen 100.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (8)

1. A touch screen, characterized in that the touch screen comprises: A tactile feedback electrode layer, used for providing electrical tactile feedback to the user, the tactile feedback electrode layer comprising tactile feedback electrodes and tactile feedback electrode leads electrically connected to the tactile feedback electrodes; A touch electrode layer, arranged on the tactile feedback electrode layer, the touch electrode layer is used to obtain a control position signal, the touch electrode layer comprises a plurality of touch electrode blocks arranged at intervals and a plurality of electrode leads electrically connected to each touch electrode block, the plurality of electrode leads are electrically connected to a processor; The processor is used to control the touch screen to provide at least a first operation and a second operation, wherein the first operation is used to implement a hovering operation according to the control position signal, and the second operation is used to control the tactile feedback electrode layer to provide electrotactile feedback; a first circuit, the first circuit being used to electrically connect the processor and the touch electrode layer; and a second circuit, the second circuit being used to electrically connect the processor and the tactile feedback electrode layer; When the touch screen provides the first operation, the processor is electrically connected to the touch electrode layer through the first circuit, and the touch electrode layer obtains the manipulation position signal; When the touch screen provides the second operation, the processor is electrically connected to the tactile feedback electrode layer through the second circuit, and the tactile feedback electrode layer generates an oscillating electric field to the human body so that the human body generates an electric sense of touch, wherein the processor is electrically connected to the tactile feedback electrode layer through the second circuit, including: the processor controls the second circuit so that the processor is electrically connected to the tactile feedback electrode through the second circuit and the tactile feedback electrode lead; The touch screen includes a shielding layer arranged on the touch electrode layer, the shielding layer includes a plurality of conductive blocks or a plurality of insulating blocks corresponding to the plurality of touch electrode blocks and a lead shielding block arranged at intervals from the plurality of conductive blocks or the plurality of insulating blocks, and the processor is electrically connected to the shielding layer through the second circuit; When the processor controls the touch screen to provide a first operation, the processor controls the shielding layer to be grounded; When the processor controls the touch screen to provide a second operation, the processor is electrically connected to the shielding layer through the second circuit. 2. The touch screen as described in claim 1 is characterized in that if the processor controls the touch screen to provide the first operation, the processor is electrically connected to the touch electrode layer through the first circuit, and the processor controls the tactile feedback electrode layer to be grounded through the second circuit, and when the human body operates the touch screen, the touch electrode layer and the human body form a touch capacitor, and the touch capacitor is used to obtain the control position signal generated when the user operates the touch screen. 3. The touch screen as described in claim 1 is characterized in that if the processor controls the touch screen to provide a second operation, the processor is electrically connected to the tactile feedback electrode layer through the second circuit, and the processor controls the electrical connection of the touch electrode layer through the first circuit, and when the human body operates the touch screen, the electric tactile feedback electrode layer forms a tactile feedback capacitor with the human body, and the tactile feedback capacitor is used to generate an oscillating electric field to the human body so that the human body has an electric sense of touch. 4. The touch screen according to claim 1, wherein the first circuit comprises a controller electrically connected to the touch electrode layer, the controller is used to generate a position detection signal, and the time period of the position detection signal is a touch detection period; the second circuit comprises a power supply, the power supply is used to generate a feedback detection signal, and the time period of the feedback detection signal includes a first detection period and a first intermittent period; In the first detection cycle, the feedback detection signal can provide the electrotactile feedback to the human body; If the touch detection period is shorter than the first intermittent period, within the first intermittent period, the processor is used to control the controller to generate the position detection signal and to detect the manipulation position signal. 5. The touch screen according to claim 4, wherein the first detection period includes a first sub-detection period and a first sub-interval period; In the first sub-detection period, the feedback detection signal can provide the electrotactile feedback to the human body; If the touch detection period is shorter than the first sub-interval period, within the first sub-interval period, the processor is used to control the controller to generate the position detection signal and to detect the manipulation position signal. 6 . The touch screen according to claim 5 , wherein the feedback detection signal comprises a low-frequency component and a high-frequency component, the frequency of the low-frequency component is 10 Hz-500 Hz, and the frequency of the high-frequency component is 10 KHz-500 KHz. 7 . The touch screen according to claim 4 , wherein the detection frequency corresponding to the touch detection period is 1000 Hz-1 MHz. 8. An electronic device, characterized in that the electronic device comprises the touch screen according to any one of claims 1 to 7.