CN115547218A

CN115547218A - Drive circuit and drive method

Info

Publication number: CN115547218A
Application number: CN202110732675.5A
Authority: CN
Inventors: 林明傳; 王文宏; 傅傳志
Original assignee: TPK Touch Solutions Xiamen Inc
Current assignee: TPK Touch Solutions Xiamen Inc
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30

Abstract

A driving circuit and a driving method are provided, the driving circuit includes at least one light emitting element, a driving line, a data line, a touch sensor and a reading line. The driving line is electrically coupled to the first end of the at least one light emitting element. The data line is electrically coupled to the second end of the at least one light emitting device. The driving line is electrically coupled to the first end of the touch sensor. The readout line is electrically coupled to the second end of the touch sensor. The read line is electrically isolated from the data line. The driving circuit of the present disclosure integrates the at least one light emitting device and the driving line of the touch sensor, thereby greatly reducing the circuit area, and rapidly charging the touch sensor through the driving line by using the driving signal provided to the at least one light emitting device.

Description

Drive circuit and drive method

Technical Field

The present disclosure relates to a driving circuit. In particular, to a driving circuit with touch sensing.

Background

In the current technology, with the popularization of touch panels, in order to provide better use experience, touch display devices are increasingly thinner and lighter, the space for accommodating circuits is reduced, and the requirement of users for sensing accuracy is also increased. How to reduce the area of the lines and pins in the touch panel and provide better sensing accuracy is an important issue in the art.

Disclosure of Invention

The present disclosure provides a driving circuit, which includes at least one light emitting device, a driving line, a data line, a touch sensor, and a readout line. The driving line is electrically coupled to the first end of the at least one light emitting element. The data line is electrically coupled to the second end of the at least one light emitting device. The driving line is electrically coupled to the first end of the touch sensor. The reading line is electrically coupled to the second end of the touch sensor, wherein the reading line is electrically isolated from the data line.

In the driving circuit of the present disclosure, the touch sensor includes a first electrode and a second electrode. The first electrodes are arranged along a first direction and are electrically coupled with the driving lines. The second electrodes are arranged along a second direction and electrically coupled to the readout lines. The second direction is different from the first direction. In the visible region, the first electrode and the second electrode are electrically insulated.

The drive circuit of the document also comprises a control circuit. The control circuit is electrically coupled to the driving line and the readout line. The control circuit is used for carrying out the following steps. Providing a driving signal to the driving line during the light emitting period, wherein the driving signal drives at least one light emitting element through the driving line and charges the touch sensor at the same time; and receiving a sensing signal from the touch sensor along the reading line in a sensing period, wherein the light emitting period is overlapped with the sensing period.

In the driving circuit of the present disclosure, the control circuit is electrically coupled to the data line, and the control circuit is further configured to perform the following steps. And providing a data signal to the at least one light-emitting element through the data line, so that the at least one light-emitting element emits light according to the data signal and the driving signal during the light-emitting period.

In some embodiments of the present disclosure, the sensing period is smaller than the light-emitting period, and the light-emitting period is a pulse width of the driving signal, such that the sensing period does not overlap a rising edge and a falling edge of the driving signal.

In the driving circuit of the present disclosure, the touch sensor includes a first electrode. The first end of the first electrode is electrically coupled to the driving line, and the second end of the first electrode is electrically coupled to the readout line.

The driving circuit of the present disclosure is sequentially operated in a light-emitting period, a sensing period, and a reset period, and further comprises a control circuit for performing the following steps. Providing a driving signal to the driving line during the light emitting period to drive at least one light emitting element and charge the touch sensor; during the sensing period, receiving a sensing signal from the touch sensor along a reading line; during the reset period, a reset signal is provided to the touch sensor along the read line to reset the potential of the touch sensor.

A driving method is used for operating a driving circuit, wherein the driving circuit comprises at least one light-emitting element and a touch sensor, wherein a first end of the at least one light-emitting element is electrically coupled with a first end of the touch sensor, and a second end of the at least one light-emitting element is electrically isolated from a second end of the touch sensor. During the light emitting period, a driving signal is provided to the first end of the at least one light emitting element and the first end of the touch sensor to drive the at least one light emitting element to emit light and charge the touch sensor. And receiving a sensing signal from the second end of the touch sensor during a sensing period, wherein the light emitting period is overlapped with the sensing period.

In the driving circuit of the present disclosure, the sensing period is smaller than the light-emitting period, and the light-emitting period is a pulse width of the driving signal, such that the rising edge and the falling edge of the driving signal are not overlapped in the sensing period.

A driving method is used for operating a driving circuit, wherein the driving circuit comprises at least one light-emitting element and a touch sensor, wherein a first end of the at least one light-emitting element is electrically coupled with a first end of the touch sensor, and a second end of the at least one light-emitting element is electrically isolated from a second end of the touch sensor. During the light emitting period, a driving signal is provided to the first end of the at least one light emitting element and the first end of the touch sensor to drive the at least one light emitting element to emit light and charge the touch sensor. During the sensing period, a sensing signal is received from the second end of the touch sensor. And during the reset period, providing a reset signal to the second end of the touch sensor so as to reset the potential of the touch sensor.

The driving circuit of the present disclosure is sequentially operated in a light-emitting period, a sensing period, and a reset period.

A driving circuit comprises at least one first light-emitting element, at least one second light-emitting element, at least one third light-emitting element, a plurality of driving lines, a plurality of data lines and a plurality of first electrodes. The driving lines include a first driving line electrically coupled to a first end of at least one first light emitting device, a second driving line electrically coupled to a first end of at least one second light emitting device, and a third driving line electrically coupled to a first end of at least one third light emitting device. The data lines are electrically coupled to the second end of the at least one first light emitting device, the second end of the at least one second light emitting device, and the second end of the at least one third light emitting device, respectively. The first driving line is electrically coupled to a first one of the first electrodes, the second driving line is electrically coupled to a second one of the first electrodes, and the third driving line is electrically coupled to a third one of the first electrodes.

The driving circuit of the document further comprises a plurality of reading lines and a plurality of second electrodes. The plurality of second electrodes are electrically coupled to the plurality of readout lines, respectively, wherein the plurality of first electrodes are arranged along a first direction, the plurality of second electrodes are arranged along a second direction, and the first direction is different from the second direction.

The driving circuit of the document further comprises a control circuit, wherein the control circuit is used for carrying out the following steps. Providing a driving signal to the first driving line during the light emitting period, wherein the driving signal drives at least one first light emitting element to emit light through the first driving line and charges a first one of the first electrodes at the same time; during the sensing period, a plurality of sensing signals are respectively received from the second electrodes, wherein the light-emitting period is overlapped with the sensing period.

The drive circuit of the document also comprises a first reading line. The first readout line is electrically coupled to a first one of the first electrodes, a second one of the first electrodes, and a third one of the first electrodes.

The driving circuit of the document further comprises a second reading line, a first resistor, a second resistor and a third resistor. The second reading line is electrically coupled to the fourth one of the first electrodes, the fifth one of the first electrodes and the sixth one of the first electrodes. The first resistor is electrically coupled between a first one of the first electrodes and a fourth one of the first electrodes. The second resistor is electrically coupled between a second one of the first electrodes and a fifth one of the electrodes. The third resistor is electrically coupled between a third one of the first electrodes and a sixth one of the first electrodes.

In summary, the driving circuit of the disclosure integrates the at least one light emitting device and the driving line of the touch sensor to greatly reduce the circuit area, and the touch sensor is rapidly charged through the driving line by using the driving signal provided to the at least one light emitting device.

Drawings

The foregoing and other objects, features, advantages and embodiments of the disclosure will be apparent from the following more particular description of the embodiments, as illustrated in the accompanying drawings in which:

fig. 1 is a circuit architecture diagram of a driving circuit according to an embodiment of the disclosure;

FIG. 2 is a circuit diagram of a driving circuit according to an embodiment of the disclosure;

FIG. 3 is a functional block diagram of a driving circuit according to an embodiment of the present disclosure;

FIG. 4 is a timing diagram of signals of the driving circuit of FIG. 2 according to an embodiment of the disclosure;

FIG. 5 is a functional block diagram of a driving circuit according to an embodiment of the present disclosure;

FIG. 6 is a timing diagram of signals of the driving circuit of FIG. 5 according to an embodiment of the disclosure;

fig. 7 and 8 are schematic views illustrating a light-emitting device lamp panel according to an embodiment of the disclosure.

[ notation ] to show

In order to make the aforementioned and other objects, features, advantages and embodiments of the present disclosure more comprehensible, the following description is given:

100,100a,100b drive circuit

110, 100a1-100a3, 100b1-100b3, 100c1-100 c3, at least one light-emitting element

120 touch sensor

121 u 1 to 121 u 3,121a1 to 121a3,121b1 to 121b3,121c1 to 121c3 first electrode

122 _u1-122 _3. Second electrode

130 control circuit

132 scanning module

134 output module

136 read module

136a analog-to-digital conversion circuit

136b read circuit

140,140 u 1-140 u 3 drive line

150,150 u 1-150 u 3 data line

160,160 u 1-160 u 3 reading line

170 control module

171 touch control processing unit

172 interface module

173 memory storage module

174 data and timing processing module

175 light emitting element driving module

176 light emitting element control module

177 touch control driving module

DSP-digital signal processing circuit

ADC (analog-to-digital converter)

Rx _1 to Rx _ n reading unit

S1, S2, S3 drive signals

Q1, Q2, Q3 data signals

P0 pin

D1 first direction

D2 the second direction

P1, P2 time period

TP1 scanning period

TP2 sensing period

TP3 reset period

Detailed Description

The following detailed description is provided to best understand the aspects of the present disclosure, but not to limit the scope of the disclosure, and the description of the structural operations is not intended to limit the order of execution, and any structures resulting from the rearrangement of elements to produce an apparatus with equivalent performance are intended to be encompassed by the present disclosure. Moreover, the drawings are for illustrative purposes only and are not drawn to scale in accordance with industry standard and conventional practice, and the dimensions of the various features may be arbitrarily increased or decreased for clarity of illustration. In the following description, like elements will be described with like reference numerals for ease of understanding.

The numbers 1 to n in the element numbers and signal numbers used in the specification and drawings are only for convenience of referring to individual elements and signals, and are not intended to limit the number of the elements and signals to a specific number. In the present specification and drawings, if an element number or a signal number is used without specifying an index of the element number or the signal number, the element number or the signal number refers to any unspecified element or signal in an element group or a signal group.

Furthermore, as used herein, the terms "comprising," including, "" having, "" containing, "and the like are open-ended terms that mean" including, but not limited to. Further, as used herein, "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "connected" or "coupled," it can be referred to as being "electrically connected" or "electrically coupled. "connected" or "coupled" may also be used to indicate that two or more elements are in mutual engagement or interaction. Moreover, although terms such as "first," "second," … are used herein to describe various elements, such terms are used only to distinguish elements or operations described in the same technical terms.

Referring to fig. 1, fig. 1 is a circuit architecture diagram of a driving circuit 100 according to an embodiment of the disclosure. As shown in fig. 1, the driving circuit 100 includes at least one light emitting device 110, a touch sensor 120, a control circuit 130, a driving line 140, a data line 150, and a readout line 160. The control circuit 130 includes a scan module 132, an output module 134, a read module 136, and a plurality of pins P0.

In some embodiments, the at least one light emitting element 110 may be implemented by a micro light emitting diode, a sub-millimeter light emitting diode, a light emitting diode, or other light emitting elements.

In the structure, the driving line 140 is electrically coupled to the first end of the at least one light emitting device 110 and the first end of the touch sensor 120, and the driving line 140 is electrically coupled to the scanning module 132 through the pin P0. The scanning module 132 provides a driving signal S1 to the driving line 140 to drive the at least one light emitting element 110 to emit light and charge the touch sensor 120.

It should be noted that, since the scanning module 132 is electrically coupled to the at least one light emitting device 110 and the touch sensor 120 through the driving line 140, the scanning module 132 provides the driving signal S1 to the at least one light emitting device 110 and the touch sensor 120 at the same time. To better explain how to drive at least one light emitting device 110 to emit light and charge the touch sensor 120 at the same time, the following embodiments will be described in detail.

The data line 150 is electrically coupled to the second end of the at least one light emitting device 110, and the data line 150 is electrically coupled to the output module 134 through the pin P0. The output module 134 provides a data signal Q1 to the data line 150 to control the brightness or brightness of the at least one light emitting element 110.

The readout line 160 is electrically coupled to the second end of the touch sensor 120, and the readout line 160 is electrically coupled to the readout module 136 through the pin P0. The reading module 136 reads the sensing signal of the touch sensor 120.

Referring to fig. 2, fig. 2 is a circuit architecture diagram of a driving circuit 100a according to an embodiment of the disclosure. As shown in fig. 2, the driving circuit 100a includes at least one light emitting element 110a1 to 110a3, 110b1 to 110b3, and 110c1 to 110c3, a control circuit 130, driving lines 140_1 to 140_3, data lines 150_1 to 150_, and reading lines 160 _1to 160_ _3. The control circuit 130 includes a scan module 132, an output module 134, a read module 136, and a plurality of pins P0.

In the embodiment of fig. 2, at least one of the light emitting elements 110a1 to 110a3, 110b1 to 110b3, and 110c1 to 110c3 is implemented by 3 light emitting elements connected in series with each other. In other embodiments, the at least one light emitting element 110a1 to 110a3, 110b1 to 110b3, and 110c1 to 110c3 may be implemented by 1, 2, 4, 6 or other numbers of light emitting elements connected in series. The light emitting elements may be implemented by micro-leds, sub-millimeter leds, or other light emitting elements.

In the embodiment of fig. 2, only three first electrodes 121\ u 1 to 121 \, three second electrodes 121 \ -u 1 to 121 \, and corresponding numbers of driving lines 140 \ -u 1 to 140 \ -u 3, data lines 150 \ -u 1 to 150 \ -u 3, and reading lines 160 \ -u 1 to 160 \ -u 3 will be described as examples. In practical examples, the driving circuit 100a may include a greater number of first electrodes, second electrodes, and a corresponding number of driving lines, data lines, and readout lines.

It is noted that the touch sensor 120 in fig. 1 can be implemented by any one of the first electrodes 121 _1to 121 _3and any one of the second electrodes 122 _1to 122 _3in fig. 2. In the visible region, the first electrodes 121 _1-121 _3and the second electrodes 122 _1-122 _3are electrically insulated from each other for mutual capacitance sensing. The first electrodes 121 _1to 121 _3extend along the second direction D2 and are sequentially arranged along the first direction D1, and the second electrodes 122 _1to 122 _3extend along the first direction and are sequentially arranged along the second direction D2. The first electrodes 121 _1to 121 _3each include a plurality of first electrode units connected in series along the second direction D2, and the second electrodes 122 _1to 122 _3each include second electrode units connected in series along the second direction D2. In some embodiments, the first electrode unit and the second electrode unit may be diamond-shaped. However, the first electrode unit and the second electrode unit may have other shapes, which is not limited to this. The first electrodes 121 _1to 121 _3and the second electrodes 122 _1to 122 _3may be implemented by a metal material (e.g., molybdenum aluminum molybdenum, copper, silver, titanium, etc.) or a transparent conductive material (e.g., indium tin oxide, zinc oxide, graphene, etc.).

In the structure, the driving line 140_1 is electrically coupled to the first end of at least one of the light emitting devices 110a1 to 110a3 and the end of the first electrode 121_1, and the driving line 140_1 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S1 to the driving line 140_1 to drive at least one of the light emitting elements 110a1 to 110a3 to emit light and charge the touch sensor 121_1.

The driving line 140\ u 2 is electrically coupled to the first end of at least one of the light emitting elements 110b1 to 110b3 and one end of the first electrode 121 \ u 2, and the driving line 140 \ u 2 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S2 to the driving line 140_2 to drive at least one of the light emitting elements 110b1 to 110b3 to emit light and charge the touch sensor 121_2.

The driving line 140_3 is electrically coupled to the first end of at least one of the light emitting devices 110c1 to 110c3 and one end of the first electrode 121_3, and the driving line 140_3 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S3 to the driving line 140_3 to drive at least one of the light emitting elements 110c1 to 110c3 to emit light and charge the touch sensor 121_3.

The data line 150\ 1 is electrically coupled to the second end of the at least one light emitting device 110a1, 110b1, and 110c1, and the data line 150_1 is electrically coupled to the output module 134 through the pin P0. The data line 150\ u 2 is electrically coupled to the second end of the at least one light emitting device 110a2, 110b2, and 110c2, and the data line 150_2 is electrically coupled to the output module 134 via the pin P0. The data line 150\ u 3 is electrically coupled to the second end of the at least one light emitting device 110a3, 110b3, and 110c3, and the data line 150_3 is electrically coupled to the output module 134 via the pin P0. The output module 134 provides the data signals Q1 to Q3 to the data lines 150 _1to 150 _3to control the brightness or brightness of at least one of the light emitting elements 110a1 to 110a3, 110b1 to 110b3, or 110c1 to 110c3, respectively.

The readout lines 160 _1to 160 _3are electrically isolated from the data lines 150 _1to 150 _3. The readout lines 160 _1to 160 _3are electrically coupled to one ends of the second electrodes 122 _1to 122_3, respectively, and the readout lines 160 _1to 160 _3are electrically coupled to the readout module 136 through the pin P0, respectively. The reading module 136 is used for reading the sensing signals of the second electrodes 122 _1to 122 _3.

For better understanding of the way the control circuit 130 reads the sensing signal, please refer to fig. 2 and fig. 3 together. FIG. 3 is a functional block diagram of a driving circuit 100a according to an embodiment of the present disclosure. As shown in fig. 3, the control circuit 130 includes a scan module 132, an output module 134, and a read module 136. The scanning module is used for providing driving signals S1-S3 respectively. The output module 134 is used for providing data signals Q1-Q3.

The reading module 136 includes a digital signal processing circuit DSP, an analog-to-digital conversion circuit 136a, and a reading circuit 136b. The analog-to-digital conversion circuit 136a includes a plurality of analog-to-digital converters ADC. The read circuit 136b includes read units Rx _1 to Rx _ n. The reading units Rx _1 to Rx _ n are electrically coupled to the plurality of analog-to-digital converters ADC, respectively. The second electrodes 122 _1to 122 _3are electrically coupled to the reading units Rx _1 to Rx _3 via a plurality of pins P0.

In some embodiments, each of the reading units Rx _1 to Rx _3 can be implemented by at least one switch, and the logic level of the enable signal is received and determined by turning on or off the switch, so as to read the sensing signal of the second electrodes 122 _1to 122 _3.

In some embodiments, the control circuit 130 also includes a control module 170. The control module 170 includes a touch processing unit 171, an interface module 172, a memory storage module 173, a data and timing processing module 174, a light emitting device driving module 175, a light emitting device control module 176, and a touch driving module 177. As shown in fig. 3, the touch processing unit 171 can store the sensing signals received from the reading module 136 in the memory storage module 173, and control the data and timing processing module 174 and the touch driving module 177 through the control interface module 172 according to the sensing signals. The touch driving module 177 is used for controlling the scanning module 132. The data and timing processing module 174 is used to control the light emitting device driving module 175 and the light emitting device control module 176. The light emitting element driving module 175 controls the scanning module 132 and the output module 134.

In some embodiments, the control module 170 can control the scanning frequency of the scanning module 132 according to the sensing signals transmitted by the reading module 136 from the second electrodes 122_1 to 122_3, so as to provide better touch sensing experience in cooperation with the user operation mode.

Referring to fig. 2, fig. 3 and fig. 4, fig. 4 is a timing diagram of signals of the driving circuit 100a of fig. 2 according to an embodiment of the disclosure. As shown in FIG. 4, when the driving signal S1 is at a high logic level, the driving signal S2 is at a low logic level and the driving signal S3 (not shown) is at a low logic level. In this case, the driving signal S1 is transmitted from the scan module 132 to the at least one light emitting element 110a1 to 110a3 and the first electrode 121' u 1 through the driving line 140_1, so that the at least one light emitting element 110a1 to 110a3 emits light during the high logic level of the driving signal S1 and simultaneously charges the first electrode 121_1. At this time, if the enabling signals received by the readout units Rx _1 to Rx _3 are at a high logic level due to a finger (or a foreign object, not shown) touching or approaching the touch sensor 120, the sensing signals can be received through the circuit paths from the readout lines 160 _1to 160 _3to the readout module 136.

In some embodiments, the pulse width of the driving signal can be regarded as the light emitting period of at least one of the light emitting devices 110a1 to 110a3, and the enable signal at the high logic level can be regarded as the sensing period of the reading units Rx _1 to Rx _3. It should be noted that in the embodiment of fig. 2, the sensing period overlaps the high logic level period of the driving signal, and the sensing period may be shorter than the high logic level period of the driving signal, so that the rising edge and the falling edge of the driving signal are not overlapped in the sensing period, and the sensing signal is not affected by the pull-up and the pull-down of the pulse of the driving signal.

Referring to fig. 5, fig. 5 is a functional block diagram of a driving circuit 100b according to an embodiment of the disclosure. The driving circuit 100b includes at least one light emitting element 110a1 to 110a3, 110b1 to 110b3, and 110c1 to 110c3, a control circuit 130, driving lines 140 \ u 1 to 140 \, data lines 150 \ -u 1 to 150 \, readout lines 160 \ -u 1 to 160 \, and first electrodes 121a1 to 121a3,121b1 to 121b3, and 121c1 to 121c3. The control circuit 130 includes a scan module 132, an output module 134, a read module 136, and a plurality of pins P0.

The touch sensor 120 in fig. 1 may be implemented by any one of the first electrodes 121a1 to 121a3,121b1 to 121b3, and 121c1 to 121c3 in fig. 5.

Compared with the driving circuit 100a in the embodiment of fig. 2, the driving circuit 100b in the embodiment of fig. 5 is different in that the first electrode in the driving circuit 100b is self-capacitance sensing instead of mutual capacitance sensing, and thus the driving circuit 100b does not have the second electrode, but consists of the first electrodes 121a1 to 121a3,121b1 to 121b3, and 121c1 to 121c3. The first electrodes 121a1 to 121a3,121b1 to 121b3, and 121c1 to 121c3 may be implemented by a metal material (e.g., molybdenum aluminum molybdenum, copper, silver, titanium, etc.) or a transparent conductive material (e.g., indium tin oxide, zinc oxide, graphene, etc.).

Structurally, the first electrodes 121a1 to 121a3 are electrically connected in series with each other along the second direction D2. The first electrodes 121b1 to 121b3 are electrically connected in series with each other along the second direction D2. The first electrodes 121c1 to 121c3 are electrically connected in series with each other along the second direction D2.

The driving line 140\ u 1 is electrically coupled to the first ends of the at least one light emitting elements 110a1 to 110a3 and the first end of the first electrode 121a1, and the driving line 140 \ u 1 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S1 to the driving line 140\ u 1 to drive at least one of the light emitting elements 110a1 to 110a3 to emit light and charge the touch sensors 121a1 to 121a 3.

The driving line 140\ u 2 is electrically coupled to the first ends of the at least one light emitting elements 110b1 to 110b3 and the first end of the first electrode 121b1, and the driving line 140 \ u 2 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S2 to the driving line 140_2 to drive at least one of the light emitting elements 110b1 to 110b3 to emit light and charge the touch sensors 121b1 to 121b 3.

The driving line 140_3 is electrically coupled to the first ends of the at least one light emitting elements 110c1 to 110c3 and the first end of the first electrode 121c1, and the driving line 140_3 is electrically coupled to the scanning module 132 through the pin P0. The scan module 132 provides a driving signal S3 to the driving line 140_3 to drive at least one of the light emitting elements 110c1 to 110c3 to emit light and charge the touch sensors 121c1 to 121c3.

The data line 150\ u 1 is electrically coupled to the second end of the at least one light emitting device 110a1, 110b1, and 110c1, and the data line 150_1 is electrically coupled to the output module 134 via the pin P0. The output module 134 provides the data signals Q1 to Q3 to the data lines 150 _1to 150 _3to control the brightness or brightness of at least one of the light emitting elements 110a1 to 110a3, 110b1 to 110b3, or 110c1 to 110c3, respectively.

The readout line 160\ u 1 is electrically coupled to the first electrodes 121a1, 121b1 and 121c1. The readout line 160\ 1 is used for receiving the sensing signal of the first electrode 121a1, 121b1 or 121c1. The readout line 160\ u 2 is electrically coupled to the first electrodes 121a2, 121b2 and 121c2. The readout line 160\ u 2 is used for receiving a sensing signal of the first electrode 121a2, 121b2 or 121c2. The readout line 160\ 3 is electrically coupled to the first electrodes 121a3,121b 3, and 121c3. The readout line 160\ 3 is used for receiving the sensing signal of the first electrode 121a3,121b 3 or 121c3.

It is noted that the resistors R0 are respectively connected in series between the first electrodes, for example, between the first electrodes 121a1 and 121a2, between the first electrodes 121a2 and 121a3, between the first electrodes 121b1 and 121b2, or between the first electrodes 121c1 and 121c2. In some embodiments, the resistor R0 may have a higher resistance value, so that when a finger (or a foreign object, not shown) touches or approaches the touch sensor 120, the touched position is not determined by mistake after receiving and determining the logic levels of the enable signals transmitted by Rx1 to Rxn.

Other detailed connection relationships of the driving circuit 100b are substantially the same as those of the driving circuit 100a in the embodiment of fig. 2, and the control circuit 130 in the driving circuit 100b can also be implemented by the control circuit 130 of fig. 3, which is not described herein again.

Please refer to fig. 3, fig. 5 and fig. 6. Fig. 6 is a timing diagram of signals of the driving circuit 100b of fig. 5 according to an embodiment of the disclosure. As shown in fig. 6, the time periods P1 and P2 of the driving circuit 100b can be divided into a scanning period TP1 (i.e., a period in which the light emitting element receives a signal to emit light), a sensing period TP2, and a reset period TP3. The scanning period TP1 (light emission period) does not overlap the sensing period TP2.

In a scanning period TP1 of the time period P1 (i.e., the period in which the light emitting device receives the signal to emit light), the driving signal S1 is at a high logic level, the driving signal S2 is at a low logic level, and the enable signals and the ground control signal (reset signal) of the reading units Rx _ 0-Rx _3 are at a low logic level. In this case, the driving signal S1 is transmitted from the scan module 132 to the at least one light emitting element 110a1 to 110a3 and the first electrode 121a1 to 121a3 through the driving line 140 v 1, so that the at least one light emitting element 110a1 to 110a3 emits light and charges the first electrode 121 u a1 to 121 v a3 at the same time.

In the sensing period TP2 of the time period P1, if a finger (or a foreign object, not shown) touches or approaches the touch sensor 120, the enable signals received by the readout units Rx _ 1-Rx _3 are at a high logic level, and the enable signals are transmitted to the readout module 136, so as to obtain the sensing signals from the first electrodes 121 _a1-121 _ _a3.

In the reset period TP3 of the time period P1, the read units Rx _1 Rx _3 are grounded through a ground control signal (reset signal), i.e., the circuit path from the read lines 160 _1to 160 _u3 to the ground (not shown) is turned on, so that the potentials of the first electrodes 121_a1 to 121 _ua 3 are reset.

Please refer to fig. 7 and fig. 8. Fig. 7 and 8 are schematic views of a light-emitting device lamp panel according to an embodiment of the disclosure. In some embodiments, the at least one light emitting element 110 is disposed on the lamp panel and spaced apart from each other by 2-10 mm. Therefore, the touch sensor 120 can be disposed between the plurality of at least one light emitting element 110.

The driving circuits 100,100a, and 100b of the present disclosure integrate at least one light emitting device 110 and the driving line 140 of the touch sensor 120, so as to greatly reduce the circuit area and reduce the pins of the control circuit 130, and the driving signal has a pulse with high current to rapidly charge the touch sensor 120. Further, by controlling the light emitting period of the at least one light emitting device 110 and the sensing period of the touch sensor 120, signal interference to the touch sensor 120 when the at least one light emitting device 110 is driven to emit light is reduced, thereby improving touch sensing accuracy.

Although the present disclosure has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the disclosure, and therefore, the scope of the disclosure is to be determined by the appended claims.

Claims

1. A driving circuit, comprising:

at least one light emitting element;

a driving line electrically coupled to the first end of the at least one light emitting device;

a data line electrically coupled to the second end of the at least one light emitting device;

a touch sensor, wherein the driving wire is electrically coupled to a first end of the touch sensor; and

and a reading line electrically coupled to the second end of the touch sensor, wherein the reading line is electrically isolated from the data line.

2. The driving circuit of claim 1, wherein the touch sensor comprises:

a first electrode arranged along a first direction and electrically coupled to the driving line; and

a second electrode arranged along a second direction, electrically coupled to the readout line, wherein the second direction is different from the first direction; wherein,

in the visible region, the first electrode and the second electrode are electrically insulated.

3. The driving circuit of claim 2, further comprising a control circuit electrically coupled to the driving line and the readout line, wherein the control circuit is configured to:

providing a driving signal to the driving line during a light emitting period, wherein the driving signal drives the at least one light emitting element through the driving line and charges the touch sensor at the same time; and

and receiving a sensing signal from the touch sensor along the reading line in a sensing period, wherein the light-emitting period is overlapped with the sensing period.

4. The driving circuit of claim 3, wherein the control circuit is electrically coupled to the data line, and the control circuit is further configured to:

and providing a data signal to the at least one light-emitting element through the data line, so that the at least one light-emitting element emits light according to the data signal and the driving signal during the light-emitting period.

5. The driving circuit of claim 3, wherein the sensing period is shorter than the emitting period, and the emitting period is a pulse width of the driving signal such that the sensing period does not overlap a rising edge and a falling edge of the driving signal.

6. The driving circuit of claim 1, wherein the touch sensor comprises:

a first electrode having a first end electrically coupled to the driving line and a second end electrically coupled to the readout line.

7. The driving circuit of claim 6, wherein the driving circuit sequentially operates in a light emitting period, a sensing period, and a reset period, and further comprising a control circuit, wherein the control circuit is configured to:

providing a driving signal to the driving line during the light emitting period to drive the at least one light emitting element and charge the touch sensor; and

during the sensing period, receiving a sensing signal from the touch sensor along the reading line; and

during the reset period, a reset signal is provided to the touch sensor along the read line to reset the potential of the touch sensor.

8. A driving method for operating a driving circuit, wherein the driving circuit includes at least one light emitting device and a touch sensor, wherein a first end of the at least one light emitting device and a first end of the touch sensor are electrically coupled, and a second end of the at least one light emitting device and a second end of the touch sensor are electrically isolated, wherein the driving method includes:

providing a driving signal to the first end of the at least one light-emitting element and the first end of the touch sensor during a light-emitting period so as to drive the at least one light-emitting element to emit light and charge the touch sensor; and

and receiving a sensing signal from the second end of the touch sensor in a sensing period, wherein the light-emitting period is overlapped with the sensing period.

9. The driving method as claimed in claim 8, wherein the sensing period is shorter than the emitting period, and the emitting period is a pulse width of the driving signal such that the sensing period does not overlap a rising edge and a falling edge of the driving signal.

10. A driving method for operating a driving circuit, wherein the driving circuit includes at least one light emitting device and a touch sensor, wherein a first end of the at least one light emitting device and a first end of the touch sensor are electrically coupled, and a second end of the at least one light emitting device and a second end of the touch sensor are electrically isolated, wherein the driving method includes:

providing a driving signal to the first end of the light-emitting element and the first end of the touch sensor during a light-emitting period so as to drive the at least one light-emitting element to emit light and charge the touch sensor;

receiving a sensing signal from the second end of the touch sensor during a sensing period; and

and during a reset period, providing a reset signal to the second end of the touch sensor so as to reset the potential of the touch sensor.

11. The driving method as claimed in claim 10, wherein the driving circuit operates in the light-emitting period, the sensing period and the reset period sequentially.

12. A driving circuit, comprising:

at least one first light emitting element;

at least one second light-emitting element;

at least one third light-emitting element;

a plurality of driving lines, each of the driving lines including a first driving line electrically coupled to the first end of the at least one first light emitting device, a second driving line electrically coupled to the first end of the at least one second light emitting device, and a third driving line electrically coupled to the first end of the at least one third light emitting device;

a plurality of data lines electrically coupled to the second end of the at least one first light emitting device, the second end of the at least one second light emitting device, and the second end of the at least one third light emitting device, respectively; and

the driving circuit comprises a plurality of first electrodes, a plurality of second electrodes and a plurality of third electrodes, wherein the first driving line is electrically coupled to a first one of the first electrodes, the second driving line is electrically coupled to a second one of the first electrodes, and the third driving line is electrically coupled to a third one of the first electrodes.

13. The driving circuit according to claim 12, further comprising:

a plurality of read lines; and

the plurality of second electrodes are respectively electrically coupled with the plurality of reading lines, wherein the plurality of first electrodes are arranged along a first direction, the plurality of second electrodes are arranged along a second direction, and the first direction is different from the second direction.

14. The driving circuit of claim 13, further comprising a control circuit, wherein the control circuit is configured to:

providing a driving signal to the first driving line during a light emitting period, wherein the driving signal drives the at least one first light emitting element to emit light through the first driving line and simultaneously charges the first one of the first electrodes on the first row; and

and respectively receiving a plurality of sensing signals from the second electrodes in a sensing period, wherein the light-emitting period is overlapped with the sensing period.

15. The driving circuit according to claim 12, further comprising:

a first readout line electrically coupled to the first one of the first electrodes, the second one of the first electrodes, and the third one of the first electrodes.

16. The driving circuit according to claim 15, further comprising:

a second read line electrically coupled to a fourth one of the first electrodes, a fifth one of the first electrodes, and a sixth one of the first electrodes;

a first resistor electrically coupled between the first one of the first electrodes and the fourth one of the electrodes;

a second resistor electrically coupled between the second one of the first electrodes and the fifth one of the electrodes; and

a third resistor electrically coupled between the third one of the first electrodes and the sixth one of the electrodes.