TWM557388U - Touch display sysyem with pressure detection - Google Patents

Abstract

The present utility model relates to a touch display system with pressure detection which includes a touch sensing layer and a display module. The display module further comprises a conductive cover layer. The touch sensing layer disposes on the display module and insulate from the conductive cover layer. The conductive cover layer is used for providing pressure detection in a first timing and providing ground in the second timing. The present utility model doesn't need set up a pressure detecting layer so that touch display system can have more simply structure and reduce the cost.

Description

Touch display system with pressure sensing

The present invention relates to the field of touch display, in particular to a touch display system with pressure sensing.

Touch display panels are widely used in various consumer electronics devices, such as: portable electronic products such as smart phones, tablet computers, cameras, e-books, MP3 players, or display screens for operating control devices. In recent years, touch display panels that can sense the amount of pressing force (also known as three-dimensional touch sensing) have received widespread attention.

To implement the pressure sensing method in the prior art, generally, an additional pressure sensor is required on the structure to achieve the pressure sensing function. However, the pressure sensor usually includes a supporting substrate and a pressure sensing electrode layer formed on the supporting substrate, and the pressure sensor is then attached to the touch display panel by a bonding method. Therefore, integrating the pressure sensing function in the touch display panel will cause the overall thickness of the touch display panel to increase and increase the cost. Therefore, the industry urgently needs to propose a new solution for integrating pressure sensing technology to overcome the problems of increased thickness and high cost of the existing touch display panel with pressure sensing.

This creation provides a touch-sensitive display system with pressure sensing, which uses the existing conductive mask layer in the display module as the pressure sensing electrode layer, and is matched with the switching design of the operating state of the conductive mask layer. Realize pressure sensing function.

In order to solve the above technical problems, the present invention provides the following technical solutions: A touch display system with pressure sensing includes a touch sensing layer and a display module. The display module further includes a conductive shielding layer. The control sensing layer is disposed on the display module and is insulated from the conductive mask layer, wherein the conductive mask layer is used to provide pressure sensing at the first timing and is used to provide pressure sensing at the second timing. The display module provides ground.

Preferably, the touch sensing layer includes a first axial electrode and a second axial electrode which intersects with the first axial electrode and is insulated.

Preferably, a control unit is included, the control unit is electrically connected to the touch sensing layer and the conductive shielding layer, and controls the operation state of the touch sensing layer and the conductive shielding layer in a time-sharing manner.

Preferably, at a first timing, the control unit controls the first axial electrode and the second axial electrode to be in a floating state, and senses a background capacitance between the conductive shielding layer and a ground terminal. A pressure sensing signal generated; at a second timing, the control unit provides a driving signal to the first axial electrode, and senses a capacitance between the second axial electrode and the first axial electrode A touch sensing signal is generated, and the conductive shielding layer is controlled to be grounded.

Preferably, the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving circuit module communicates with the first circuit switch through the circuit switch. The axial electrode is electrically connected, the touch sensing circuit module is electrically connected to the second axial electrode through the circuit switch, and the pressure sensing circuit module is electrically connected to the conductive shielding layer through the circuit switch. .

Preferably, the control unit further includes a signal control module, which is electrically connected to a plurality of the circuit switches and is used to control the connection state of each of the circuit switches.

Preferably, at a first timing, the signal control module controls the circuit switch connected to the first axial electrode and the second axial electrode to float, and controls the circuit switch connected to the conductive shielding layer. Conducted to the pressure sensing circuit module; at a second timing, the signal control module controls the circuit switch connected to the first axial electrode to conduct to the driving circuit module and controls the second axial electrode The connected circuit switch is electrically connected to the touch sensing circuit module, and controls the circuit switch connected to the conductive shielding layer to be grounded.

Preferably, at a first timing, the control unit provides a driving signal to the first axial electrode, and senses a touch generated by a capacitance between the second axial electrode and the first axial electrode. Control the sensing signal and a pressure sensing signal generated by sensing a capacitance between the conductive shielding layer and the first axial electrode; at a second timing, the control unit provides the driving signal to the first An axial electrode, sensing the touch sensing signal generated by the capacitance between the second axial electrode and the first axial electrode, and controlling the conductive shielding layer to a grounded state.

Preferably, the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving circuit module communicates with the first circuit switch through the circuit switch. The axial electrode is electrically connected, the touch sensing circuit module is electrically connected to the second axial electrode through the circuit switch, and the pressure sensing circuit module is electrically connected to the conductive shielding layer through the circuit switch. .

Preferably, the control unit further includes a signal control module, which is electrically connected to the circuit switches and is used to control the connection state of each of the circuit switches.

Preferably, at a first timing, the signal control module controls the circuit switch connected to the first axial electrode to conduct to the driving circuit module, and controls the circuit switch connected to the second axial electrode to conduct. In the touch sensing circuit module, and controlling the circuit switch connected to the conductive shielding layer to be conductive to the pressure sensing circuit module; at a second timing, the signal control module controls the first axis The circuit switch connected to the electrodes is conducted to the driving circuit module, and the circuit switch connected to the second axial electrode is controlled to be connected to the touch sensing circuit module, and the circuit switch connected to the conductive shielding layer is controlled. The circuit switch is grounded.

Preferably, the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving circuit module is electrically connected to the first axial electrode. The touch sensing circuit module is electrically connected to the second axial electrode. The pressure sensing circuit module is electrically connected to the conductive shielding layer through the circuit switch.

Preferably, the control unit further includes a signal control module. Group, which is electrically connected to the circuit switch and is used to control the connection state of each of the circuit switches.

Preferably, at the first timing, the signal control module controls the circuit switch connected to the conductive mask layer to be conducted to the pressure sensing circuit module; at the second timing, the signal control module controls the conductive circuit. The circuit switch connected to the mask layer is grounded.

Preferably, the conductive shielding layer is a conductive layer with a patterned structure or a conductive layer with a complete planar structure.

In summary, the touch display system with pressure sensing provided by this creation uses the existing conductive mask layer in the display module as the pressure sensing layer, and is matched with the operating state of the conductive mask layer. The switching design is used to perform time-sharing scanning, thereby realizing the pressure sensing function without affecting the function of the display module. Therefore, compared with the prior art, the present invention can realize the pressure sensing function in the touch display system without setting an additional pressure sensing layer, which can simplify the structure of the pressure sensing and reduce the cost.

10‧‧‧Touch display system

101‧‧‧finger

11‧‧‧Control unit

111‧‧‧Signal Control Module

112‧‧‧Drive circuit module

113‧‧‧touch sensing circuit module

114‧‧‧Pressure sensing circuit module

120‧‧‧Display Module

121‧‧‧ touch sensing layer

1211‧‧‧First axial electrode

1212‧‧‧Second axial electrode

122‧‧‧ conductive mask layer

123‧‧‧display unit

20‧‧‧Touch display system

21‧‧‧Control unit

221‧‧‧ touch sensing layer

222‧‧‧ conductive mask layer

223‧‧‧display unit

90‧‧‧Touch display panel

901‧‧‧ cover

902‧‧‧ touch sensing layer

903‧‧‧Upper polarizer

904‧‧‧ conductive mask layer

905‧‧‧color filter

907‧‧‧LCD layer

908‧‧‧ thin film transistor component layer

909‧‧‧ substrate

910‧‧‧ bottom polarizer

911‧‧‧ backlight

S‧‧‧circuit switch

TX1-TXn‧‧‧ cable

RX1-RXm‧‧‧ cable

RX‧‧‧ cable

FIG. 1 is a schematic structural diagram of a touch display panel provided by the author.

FIG. 2 is a schematic diagram of a frame of a touch display system with pressure sensing in the first embodiment of the present invention.

FIG. 3 is a module schematic diagram of a control unit in the touch display system with pressure sensing shown in FIG. 2.

FIG. 4 is a schematic diagram of the equivalent capacitance of the touch display system with pressure sensing shown in FIG. 2.

FIG. 5 is a module schematic diagram of another embodiment of the control unit in the touch display system with pressure sensing shown in FIG. 3.

FIG. 6 is a schematic structural diagram of a touch display system with pressure sensing according to the second embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a modified embodiment of the touch display system with pressure sensing in the second embodiment of the present invention.

In order to make the purpose of this creation, technical solutions and advantages more clear, the following further describes this creation in detail with reference to the drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the creation, and are not used to limit the creation.

Please refer to FIG. 1, which provides a touch display panel 90. The touch display panel 90 includes a cover plate 901, a touch sensing layer 902, and a display module 120 which are disposed in order from top to bottom. The touch sensing layer 902 is used to detect a touch position, and the touch sensing layer 902 can be attached to the cover plate 901 through an optical adhesive (not shown), or can be directly used by photolithography. The manufacturing process is formed on the surface of the cover plate 901, which is not limited in this embodiment. After that, the cover plate 901 integrated with the touch sensing layer 902 is attached to the display module 120 through another optical adhesive (not shown).

The display module 120 in this embodiment may be, for example, a lateral electric field effect display panel (In-Plain Switching, IPS). An upper polarizer 903, a conductive mask layer 904, a color filter layer 905, a liquid crystal layer 907, a thin film transistor module layer 908, a substrate 909, a lower polarizer 910, and a backlight plate 911 are disposed next. Among them, those skilled in the art can understand that the structure of the display panel 120 is not limited to the embodiment, and any display panel structure including the conductive mask layer 904 is a range that can be applied and adjusted in the present invention.

In this creation, the conductive mask layer 904 existing in the display module 120 is used to scan in a time-sharing manner by switching the operating state. The conductive mask layer 904 is designed to provide grounding for the display module 120 and The touch display system 90 is provided with a pressure sensing function. It is added that the conductive shielding layer 904 in the display module 120 is used to eliminate the accumulated charge on the surface of the display module 120 when it is grounded, and to reduce the electrostatic interference of the external environment, so as to avoid affecting the display effect of the display module 120 .

Referring to FIG. 2, the first embodiment of the present invention specifically provides a touch display system 10 with pressure sensing, which includes a display module 120 and a touch sensing layer 121. The display module 120 in this embodiment may adopt the overall structural design of the display module 120 as shown in FIG. 1. In order to simplify the description here, only the conductive mask layer 122 and the display unit 123 are used to represent the description. The masking layer 122 is the conductive masking layer 904 in the touch display panel 90 of FIG. 1, and the display unit 123 includes the layers other than the conductive masking layer 904 in the touch display panel 90 of FIG. 1. . The touch sensing layer 121 is configured to provide position sensing of a touch position for the touch display system 10 having pressure sensing.

In this embodiment, the touch sensing layer 121 is disposed on a display mode. It is arranged on the group 120 and is insulated from the conductive mask layer 122. Specifically, the touch sensing layer 121 may be adhered to the display module 120 through an optical adhesive (not shown), so as to be at least insulated from the conductive shielding layer 122 of the display module 120 through the optical adhesive. Settings.

As shown in FIG. 2, the touch display system 10 with pressure sensing further includes a control unit 11. The control unit 11 is electrically connected to the touch sensing layer 121 and the conductive mask layer 122 and controls the touch control in a time-sharing manner. The operating state of the sensing layer 121 and the conductive shielding layer 122. Wherein, the conductive shielding layer 122 is used to provide pressure sensing at the first timing, and is used to provide ground for the display module 120 at the second timing.

Further, the conductive mask layer 122 of this embodiment has no electrode pattern, that is, the conductive mask layer 122 is a conductive layer with a complete planar structure. The touch sensing layer 121 includes a first axial electrode 1211 and a second axial electrode 1212, wherein the first axial electrode 1211 and the second axial electrode 1212 intersect and are disposed to be insulated, as shown in FIG. 2, the first The axial electrode 1211 and the second axial electrode 1212 are arranged in an array of n rows × m columns of a diamond pattern. Of course, those skilled in the art can understand that the specific implementation of the touch sensing layer 121 in this embodiment is not limited by this creation. Any electrode pattern and electrode stack structure design that can be used to sense the touch position are It belongs to the scope of application that this creation can cover.

The first axial electrode 1211 and the control unit 11 are respectively electrically connected through the connection lines TX1-TXn, and the second axial electrode 1212 and the control unit 11 are also electrically connected respectively. The conductive shielding layer 122 and the control unit 11 are electrically connected through a connection line RX. The arrangement of the connecting lines is beneficial to each electrode between the control unit 11 and the touch sensing layer 121 and the conductive shielding layer 122 Signals are transmitted between each other.

In this embodiment, in order to use the conductive mask layer 122 in the display module 120 as a pressure sensing layer, the control unit 11 performs time-sharing scanning by controlling the operating state of the conductive mask layer 122, that is, the control unit 11 will conduct electricity The mask layer 122 is switched to operate in a pressure sensing or grounding state, and the signal scanning is divided into a first timing and a second timing, so that the conductive mask layer 122 is used to provide pressure sensing during the first timing. The conductive shielding layer 122 is used to provide ground for the display module 120 at the second timing.

In this embodiment, the pressure sensing method of the conductive shielding layer 122 may specifically adopt a self-capacitive type or a mutual-capacitive type to sense a capacitance change amount generated by a finger press. More specifically, because the greater the finger pressing force, the larger the contact area between the finger and the cover plate 901, and when the finger has a larger contact area, it is relatively increased in sensing (in the self-capacitive type). The capacitance value of sensing) or reducing (for mutual capacitance sensing) will be larger, so this embodiment allows the capacitive sensing method to be used for pressure sensing.

When the pressure sensing method of the conductive shielding layer 122 is a self-capacitive sensing design, at a first timing, the control unit 11 controls the first axial electrode 1211 and the second axial electrode 1212 to be in a floating state ( Floating), and senses a pressure sensing signal generated by a background capacitor between the conductive shielding layer 122 and a ground terminal (not shown); at a second timing, the control unit 11 provides a driving signal to the first The axial electrode 1211 senses a touch sensing signal generated by a capacitance between the second axial electrode 1212 and the first axial electrode 1211, and controls the conductive shielding layer 122 to a ground state.

When the pressure sensing method of the conductive shielding layer 122 is mutual capacitance In the design of the type sensing, the control unit 11 provides a driving signal to the first axial electrode 1211 at a first timing, and senses a capacitor between the second axial electrode 1212 and the first axial electrode 1211. A touch sensing signal generated and a pressure sensing signal generated by sensing a capacitance between the conductive shielding layer 122 and the first axial electrode 1211; at a second timing, the control unit 11 provides a driving signal to The first axial electrode 1211 senses a touch sensing signal generated by a capacitance between the second axial electrode 1212 and the first axial electrode 1211 and controls the conductive shielding layer 122 to a grounded state.

As shown in FIGS. 2 and 3, the control unit 11 further includes a signal control module 111, a driving circuit module 112, a touch sensing circuit module 113, a pressure sensing circuit module 114, and a plurality of circuit switches S. Please refer to FIGS. 2 and 3 at the same time. The driving circuit module 112 is connected to the touch sensing layer 121 through the circuit switch S and the connection lines TX1-TXn, and is specifically connected to the first axial electrode 1211 of the touch sensing layer 121. ; The touch sensing circuit module 113 is connected to the touch sensing layer 121 through the circuit switch S and the connection lines RX1-RXm, specifically connected to the first axial electrode 1212 of the touch sensing layer 121; the pressure sensing circuit The module 114 may be connected to the conductive shielding layer 122 through a circuit switch S and a connection line (RX or TX).

The signal control module 111 is electrically connected to the circuit switch S, and can send a switching signal to control the connection state of each circuit switch S. The design of the control unit 11 in this embodiment through the design of the circuit switch S is applicable to the self-capacitive and mutual-capacitive pressure sensing methods used for the conductive shielding layer 122 described above.

Under the structure of the control unit 11 shown in FIG. 3, the following uses the self-capacitive and mutual-capacitive pressure sensing methods to match the points of the control unit 11. The scan sensing design is used for illustration.

Example of a self-capacitive pressure sensing method: At a first timing (time t1), the signal control module 111 controls the circuit switch S connected to the first axial electrode 1211 and the second axial electrode 1212 to float. That is, the first axial electrode 1211 and the second axial electrode 1212 are not connected to the driving circuit module 112 and the touch sensing circuit module 113 respectively; in addition, the circuit switch S connected to the conductive shielding layer 122 is controlled Conducted to the pressure sensing circuit module 114. In this regard, in this embodiment, at the first timing, the driving circuit module 112 and the touch sensing circuit module 113 do not perform touch position sensing; the pressure sensing circuit module 114 uses self-capacitive sensing The conductive mask layer 122 is scanned for pressure sensing.

At the second timing (time t2), the signal control module 111 controls the circuit switch S connected to the first axial electrode 1211 to be turned on to the driving circuit module 112, and controls the circuit switch S connected to the second axial electrode 1212. It is electrically connected to the touch sensing circuit module 113; in addition, the circuit switch S connected to the conductive shielding layer 122 is grounded. In this regard, at the second timing in this embodiment, the driving circuit module 112 and the touch sensing circuit module 113 interact with the touch sensing layer 121 (the first axial electrode 1211 and the second axial electrode 1212). Capacitive sensing for touch position sensing; at this time, the conductive mask layer 122 is in a grounded state and is used to provide a desired grounding effect for the display module 123.

It is added that, in an embodiment, the ground terminal of the circuit switch S connected to the conductive shielding layer 122 may be, for example, a metal frame or a metal casing (not shown) designed to be electrically connected to the touch display system 10. , Or it may be designed that the conductive shielding layer 122 is electrically connected to a circuit where the control unit 11 is located The ground terminal on the board (not shown) is not limited by this creation.

An embodiment of the mutual-capacitance pressure sensing method: at a first timing (time t1), the signal control module 111 controls the circuit switch S connected to the first axial electrode 1211 to be turned on to the driving circuit module 112, and The circuit switch S connected to the second axial electrode 1212 is controlled to be electrically connected to the touch sensing circuit module 113, and the circuit switch S connected to the conductive shielding layer 122 is controlled to be electrically connected to the pressure sensing circuit module 114. In this regard, at the first timing of this embodiment, the driving circuit module 112 and the touch sensing circuit module 113 perform the touch sensing layer 121 (the first axial electrode 1211 and the second axial electrode 1212). Mutual capacitance sensing for touch position sensing; at this time, the pressure sensing circuit module 114 scans the conductive mask layer 122 with mutual capacitance sensing for pressure sensing.

At the second timing (time t2), the signal control module 111 controls the circuit switch S connected to the first axial electrode 1211 to be turned on to the driving circuit module 112, and controls the circuit switch S connected to the second axial electrode 1212. It is electrically connected to the touch sensing circuit module 113 and controls the circuit switch S connected to the conductive shielding layer 122 to ground. In this regard, at the second timing in this embodiment, the driving circuit module 112 and the touch sensing circuit module 113 interact with the touch sensing layer 121 (the first axial electrode 1211 and the second axial electrode 1212). Capacitive sensing for touch position sensing; at this time, the conductive mask layer 122 is in a grounded state and is used to provide a desired grounding effect for the display module 123.

Further, the principle of pressure sensing of the touch display system 10 with pressure sensing is as shown in FIG. 4, wherein the finger 101, the touch sensing layer 121, the conductive shielding layer 122, and the ground terminal GND respectively Represents a conductor, and two conductors separated by a space or a dielectric layer can form a capacitor.

If the conductive mask layer 122 adopts a self-capacitive sensing method, when the finger 101 touches or presses the touch display system 10 with pressure sensing, the finger 101 and the conductive mask are generated due to the intervention of the finger 101 The capacitance between the layers 122 will form a series connection with the background capacitance between the conductive shielding layer 122 and the ground terminal GND. Therefore, the pressure sensing circuit module 114 will sense the distance between the conductive shielding layer 122 and the ground terminal GND. Background capacitance value plus the capacitance value between the finger 101 and the conductive mask layer 122, and the capacitance change between the summed capacitance value and the original background capacitance value is the pressure sensing The pressure sensing signal sensed by the circuit module 114. The greater the pressure of the finger 101, the greater the contact area between the finger 101 and the surface of the touch display system 10 with pressure sensing. Correspondingly, the capacitance value between the finger 101 and the conductive shielding layer 122 will also increase. Bigger. According to this, the pressure sensing circuit module 114 can determine the pressing pressure channel of the finger 101 by the magnitude of the capacitance change amount sensed.

If the mutual capacitance scanning method is adopted, when the finger 101 touches or presses the touch display panel 10 with pressure sensing, the capacitance between the finger 101 and the touch sensing layer 121 due to the finger 101's intervention will be Forms a parallel connection with the capacitance between the original touch sensing layer 121 and the conductive shielding layer 122. Therefore, the pressure sensing circuit module 114 will sense the capacitance between the touch sensing layer 121 and the conductive shielding layer 122. The capacitance value is subtracted from the capacitance value between the finger 101 and the touch sensing layer 121, and this reduced capacitance value is the same as the capacitance capacitance between the touch sensing layer 121 and the conductive shielding layer 122. Capacitance between values The amount of change is the pressure sensing signal sensed by the pressure sensing circuit module 114. In the same way, the pressure sensing circuit module 114 can also determine the pressing pressure channel of the finger 101 by the magnitude of the sensed capacitance change.

Please refer to FIG. 5. In this modified embodiment, the control unit 11 also includes a signal control module 111, a driving circuit module 112, a touch sensing circuit module 113, a pressure sensing circuit module 114, and a circuit switch. S. The difference from the embodiment shown in FIG. 4 is that the driving circuit module 112 of this embodiment is directly electrically connected to the touch sensing layer 121 (the first axial electrode 1211) through the connecting lines TX1-TXn. Similarly, the touch-sensing circuit module 113 is directly electrically connected to the touch-sensing layer 121 (the second axial electrode 1212) through the connection lines RX1-RXm. In addition, the pressure sensing circuit module 114 is still connected to the conductive shielding layer 122 through the circuit switch S and the connection line RX or TX. In this regard, the signal control module 111 is electrically connected to the circuit switch S, and the signal control module 111 can also send a switching signal to control the connection state of the circuit switch S.

Compared with the embodiment in FIG. 3, the structure of the control unit 11 in this embodiment can effectively save the volume occupied by the circuit switch S connected to the touch sensing layer 121, but the control unit in this embodiment 11 is only applicable to the mutual-capacitance-type pressure sensing method for the conductive shielding layer 122.

Under the structure of the control unit 11 shown in FIG. 5, the mutual-capacitive pressure sensing method and the time-sharing scanning sensing design of the control unit 11 are used to explain as follows: At the first timing (time t1), The signal control module 111 controls the circuit switch S connected to the conductive shielding layer 122 to conduct pressure sensing electricity. 路 模 114。 Road module 114. In this regard, at the first timing of this embodiment, the driving circuit module 112 and the touch sensing circuit module 113 perform the touch sensing layer 121 (the first axial electrode 1211 and the second axial electrode 1212). Mutual capacitance sensing for touch position sensing; at this time, the pressure sensing circuit module 114 scans the conductive mask layer 122 with mutual capacitance sensing for pressure sensing.

At the second timing (time t2), the signal control module 111 controls the circuit switch S connected to the conductive shielding layer 122 to ground. In this regard, at the second timing in this embodiment, the driving circuit module 112 and the touch sensing circuit module 113 interact with the touch sensing layer 121 (the first axial electrode 1211 and the second axial electrode 1212). Capacitive sensing for touch position sensing; at this time, the conductive mask layer 122 is in a grounded state and is used to provide a desired grounding effect for the display module 123.

In some embodiments of the present invention, the control unit 11 may use an existing touch circuit chip, or may be a newly set sensing circuit chip. In this creation, it is only necessary to change its signal scanning and processing method, and use the conductive mask layer 904 already existing in the touch display panel 90 (which includes the IPS panel) shown in FIG. 1 to make the pressure sense. The touch display system 10 has a three-dimensional touch sensing function.

In this creation, in the process of sensing the conductive mask layer 122 using a self-capacitive scanning or a mutual-capacitive scanning method, the matching requirements for the touch electrodes of the touch sensing layer 121 may preferably be: In the self-capacitive scanning method, the gap between the first axial electrode 1211 and the second axial electrode 1212 can be small, and the size of the gap can be reduced during the self-capacitive scanning of the conductive mask layer 122. will affect The amount of capacitance change of the pressing force finally obtained.

If the mutual capacitance scanning method is adopted, the gap between the first axial electrode 1211 and the second axial electrode 1212 needs to be larger to reduce the original distance between the first axial electrode 1211 and the second axial electrode 1212. To avoid the mutual capacitance sensing effect on the conductive shielding layer 122.

Please refer to FIG. 6. The second embodiment of the present invention also provides a touch display system 20 with pressure sensing, which includes at least a touch sensing layer 221, a conductive mask layer 222, and a display provided from top to bottom. Unit 223.

The difference from the pressure-sensitive touch display system 10 in FIG. 3 is that the conductive mask layer 222 has an electrode pattern, that is, the conductive mask layer 222 is a conductive layer with a patterned structure. Specifically, as shown in FIG. 6, the conductive mask layer 222 may be patterned into a plurality of strip-shaped electrodes.

It is further explained that, because the conductive mask layer 222 is mainly used to provide pressure sensing and grounding functions, rather than to accurately sense the touch position, in a preferred embodiment, the conductive mask layer 222 The multiple electrodes do not need to be electrically connected to the control unit 21 through a separate connection line, but only need to connect all electrodes in parallel or in series first, and finally be electrically connected to the control unit 21 through a connection line. To save the wiring area of the connection line.

In some other embodiments of the present invention, as shown in FIG. 7, the conductive mask layer 222 'may be patterned into a plurality of curved electrodes, and the plurality of electrodes are arranged in series.

In some preferred embodiments of the present invention, the conductive mask layer 222 ′ may be further patterned into a shape such as a radial shape, a spiral shape, or a polyline shape. One or a combination of several electrodes.

In this embodiment, the number and shape of the electrodes of the conductive shielding layer 222 (222,) are listed as examples only, and not as a limitation of this creation. In practical applications, whether the conductive mask layer 222 (222 ') has a specific pattern design does not affect the accuracy and sensitivity of the three-dimensional touch sensing.

Compared with the prior art, the touch display system with pressure sensing provided by this creation has the following advantages: The touch display system with pressure sensing provided by this creation includes a touch sensing layer and a The display module scans the conductive mask layer included in the display module in a time-sharing manner, so that the conductive mask layer is used to provide pressure sensing at the first timing, and the conductive mask layer is at the second timing. The timing is used to provide ground for the display module. Specifically, the existing conductive mask layer in the display module is used as the pressure sensing layer, and the switching design of the operating state of the conductive mask layer is used for time-sharing scanning, so as not to affect the display module. The function realizes the pressure sensing function under the function. Therefore, compared with the prior art, the present invention can realize the pressure sensing function in the touch display system without setting an additional pressure sensing layer, which can simplify the structure of the pressure sensing and reduce the cost.

In this creation, a control unit is used to control the operation state of the touch sensing layer and the conductive mask layer in a time-sharing manner. The control unit can further sense a capacitance between the first axial electrode and the second axial electrode. A touch-sensing signal generated can also be used for pressure sensing of the conductive mask layer using self-capacitive sensing or mutual-capacitive sensing. The control unit's time-sharing control method can avoid the interference of signals between the position sensing and pressure sensing of touching or pressing, and reduce the pressure. Sensing the signal-to-noise ratio of the signal to achieve more accurate position and pressure sensing of touch and press.

The above is only a preferred embodiment of this creation, and is not intended to limit this creation. Any modification, equivalent replacement, and improvement made within the principles of this creation shall be included in the scope of protection of this creation.

10‧‧‧Touch display system

11‧‧‧Control unit

120‧‧‧Display Module

121‧‧‧ touch sensing layer

1211‧‧‧First axial electrode

1212‧‧‧Second axial electrode

122‧‧‧ conductive mask layer

123‧‧‧display unit

TX1-TXn‧‧‧ cable

RX1-RXm‧‧‧ cable

RX‧‧‧ cable

Claims (15)

A touch display system with pressure sensing includes: a touch sensing layer; and a display module. The display module further includes a conductive shielding layer, and the touch sensing layer is disposed on the display module. The conductive shielding layer is disposed above the conductive shielding layer, wherein the conductive shielding layer is used to provide pressure sensing at the first timing, and is used to provide ground to the display module at the second timing. The touch display system according to claim 1, wherein the touch sensing layer includes a first axial electrode and a second axial electrode that intersects the first axial electrode and is insulated from the first axial electrode. The touch display system shown in claim 2, wherein the touch display system includes a control unit, the control unit is electrically connected to the touch sensing layer and the conductive mask layer, and controls the touch control in a time-sharing manner. The operating state of the sensing layer and the conductive shielding layer. The touch display system shown in claim 3, wherein, at a first timing, the control unit controls the first axial electrode and the second axial electrode to be in a floating state, and senses the conductive mask layer A pressure sensing signal generated by a background capacitance between a ground terminal and a ground terminal; at a second timing, the control unit provides a driving signal to the first axial electrode and senses the second axial electrode and the A touch sensing signal generated by a capacitor between the first axial electrodes, and controlling the conductive shielding layer to a ground state. The touch display system shown in claim 4, wherein the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving The circuit module is electrically connected to the first axial electrode through the circuit switch, the touch sensing circuit module is electrically connected to the second axial electrode through the circuit switch, and the pressure sensing circuit module is connected through the circuit switch. The circuit switch is electrically connected to the conductive shielding layer. The touch display system shown in claim 5, wherein the control unit further includes a signal control module electrically connected to a plurality of the circuit switches, and is used to control the connection of each of the circuit switches. status. The touch display system shown in claim 6, wherein, at a first timing, the signal control module controls the circuit switch connected to the first axial electrode and the second axial electrode to float, and controls The circuit switch connected to the conductive shielding layer is conducted to the pressure sensing circuit module; at a second timing, the signal control module controls the circuit switch connected to the first axial electrode to be conducted to the driving circuit module. And control the circuit switch connected to the second axial electrode to be electrically connected to the touch sensing circuit module, and control the circuit switch connected to the conductive shield layer to be grounded. The touch display system shown in claim 3, wherein, at a first timing, the control unit provides a driving signal to the first axial electrode, and senses the second axial electrode and the first axial electrode. Electricity between electrodes A touch sensing signal generated by the capacitor and a pressure sensing signal generated by sensing a capacitor between the conductive mask layer and the first axial electrode; at a second timing, the control unit provides the Driving a signal to the first axial electrode, sensing the touch sensing signal generated by the capacitance between the second axial electrode and the first axial electrode, and controlling the conductive shielding layer to be grounded status. The touch display system shown in claim 8, wherein the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving The circuit module is electrically connected to the first axial electrode through the circuit switch, the touch sensing circuit module is electrically connected to the second axial electrode through the circuit switch, and the pressure sensing circuit module is connected through the circuit switch. The circuit switch is electrically connected to the conductive shielding layer. The touch display system shown in claim 9, wherein the control unit further includes a signal control module, which is electrically connected to the circuit switches and is used to control the connection state of each of the circuit switches. The touch display system shown in claim 10, wherein, at a first timing, the signal control module controls the circuit switch connected to the first axial electrode to be turned on to the driving circuit module, and controls the The circuit switch connected to the second axial electrode is turned on to the touch sensing circuit module, and the circuit switch connected to the conductive shield layer is turned on to the pressure sensor. Test circuit module; at a second timing, the signal control module controls the circuit switch connected to the first axial electrode to be turned on to the driving circuit module, and controls the circuit switch connected to the second axial electrode It is electrically connected to the touch sensing circuit module and controls the circuit switch connected to the conductive shielding layer to ground. The touch display system shown in claim 8, wherein the control unit includes a driving circuit module, a touch sensing circuit module, a pressure sensing circuit module, and a plurality of circuit switches, wherein the driving A circuit module is electrically connected to the first axial electrode, the touch sensing circuit module is electrically connected to the second axial electrode, and the pressure sensing circuit module is connected to the conductive shielding layer through the circuit switch. Electrical connection. The touch display system shown in claim 12, wherein the control unit further includes a signal control module, which is electrically connected to the circuit switches, and is used to control the connection state of each of the circuit switches. The touch display system shown in claim 13, wherein, at the first timing, the signal control module controls the circuit switch connected to the conductive mask layer to be turned on to the pressure sensing circuit module; In sequence, the signal control module controls the circuit switch connected to the conductive shield layer to ground. The touch display system according to any one of claims 1 to 14, wherein the conductive mask layer is a conductive layer with a patterned structure Or a conductive layer with a complete planar structure.