WO2016032085A1

WO2016032085A1 - Method for scanning touch panel and touch integrated circuit for performing same

Info

Publication number: WO2016032085A1
Application number: PCT/KR2015/003751
Authority: WO
Inventors: 홍원철; 송준; 김한경; 김영욱
Original assignee: 주식회사 동부하이텍
Priority date: 2014-08-29
Filing date: 2015-04-15
Publication date: 2016-03-03
Also published as: KR20160026041A

Abstract

A method for scanning a touch panel and a touch integrated circuit are disclosed. A touch driver sequentially provides driving signals to odd-numbered driving lines of a touch panel, and a signal processing unit sequentially detects sensing signals corresponding to the odd-numbered driving lines from sensing lines of the touch panel in order to obtain first scan data. Then, the touch driver sequentially provides driving signals to even-numbered driving lines of the touch panel, and the signal processing unit sequentially detects sensing signals corresponding to the even-numbered driving lines from the sensing lines in order to obtain second scan data.

Description

Touch panel scanning method and touch integrated circuit for performing the same

Embodiments of the present invention relate to a touch panel scanning method and a touch integrated circuit for performing the same. More particularly, the present invention relates to a method for scanning a touch panel to detect a touch signal or gesture by a user, and a touch integrated circuit for performing the same.

The touch panel may be used as an input device of a smart device including a display panel and an application processor. The touch panel may be classified into a resistive type, a capacitive type, an electro magnetic type, and the like.

As an example, a mutual capacitance type touch panel may detect a touch position by measuring a mutual capacitance changed by a touch of a conductor between a driving line and a sensing line.

The mutual capacitance type touch panel may include a plurality of driving lines and a plurality of sensing lines crossing the driving lines. When driving signals are sequentially provided to the driving lines, mutual capacitance generated by the provision of the driving signals from the sensing lines may be detected. The driving lines and the sensing lines may be connected to a touch integrated circuit, and the touch integrated circuit may provide the driving signals and obtain touch signals from the sensing lines.

The touch integrated circuit may sequentially provide driving signals to the driving lines, and sequentially detect sensing signals corresponding to the driving lines from the sensing lines. However, when the touch panel is operated in the full scan mode as described above, power consumption of the touch panel may be increased.

Embodiments of the present invention for solving the above problems are to provide a touch panel scanning method that can reduce the power consumption of the touch panel and a touch integrated circuit suitable for performing the same.

According to an aspect of the present invention for achieving the above object, the touch panel scanning method, comprising sequentially providing drive signals to the odd-numbered driving lines of the touch panel, from at least some of the sensing lines of the touch panel And sequentially detecting sensing signals corresponding to the odd-numbered driving lines to obtain first scan data.

According to embodiments of the present disclosure, the method may further include sequentially providing driving signals to even-numbered driving lines of the touch panel, and corresponding to the even-numbered driving lines from the at least some sensing lines. The method may further include obtaining second scan data by sequentially detecting the sensing signals.

According to embodiments of the present invention, the first scan data may be obtained from odd or even sensing lines among the sensing lines.

In example embodiments, the first scan data may be obtained from odd-numbered sensing lines among the sensing lines. In this case, the method may include sequentially providing driving signals to the odd-numbered driving lines, and sequentially detecting sensing signals corresponding to the odd-numbered driving lines from even-numbered sensing lines of the touch panel. The method may further include obtaining second scan data.

The method may further include sequentially providing driving signals to even-numbered driving lines of the touch panel, and sequentially detecting sensing signals corresponding to the even-numbered driving lines from the odd-numbered sensing lines. Acquiring 3 scan data; sequentially providing driving signals to the even-numbered driving lines; sequentially detecting sensing signals corresponding to the even-numbered driving lines from the even-numbered sensing lines; The method may further include obtaining 4 scan data.

According to another aspect of the present invention for achieving the above object, a touch integrated circuit, a touch driver for providing drive signals to the drive lines of the touch panel, and a signal processor for detecting the sensing signals from the sensing lines of the touch panel And a controller for controlling operations of the touch driver and the signal processor. In this case, the touch driver sequentially provides driving signals to odd-numbered driving lines among the driving lines, and the signal processor sequentially processes sensing signals corresponding to the odd-numbered driving lines from at least some of the sensing lines. The first scan data may be obtained by detecting the data.

According to embodiments of the present invention, the touch driver sequentially provides driving signals to even-numbered driving lines of the touch panel, and the signal processor is configured to provide the even-numbered driving lines from the at least some sensing lines. Second scan data may be obtained by sequentially detecting corresponding sensing signals.

In example embodiments, the first scan data may be obtained from odd-numbered sensing lines among the sensing lines. After the first scan data is obtained, the touch driver sequentially provides driving signals to the odd-numbered driving lines, and the signal processor corresponds to the odd-numbered driving lines from even-numbered sensing lines of the touch panel. The second scan data may be obtained by sequentially detecting the sensing signals.

After the second scan data is obtained, the touch driver sequentially provides driving signals to even-numbered driving lines of the touch panel, and the signal processor corresponds to the even-numbered driving lines from the odd-numbered sensing lines. The sensing signals may be sequentially detected to obtain third scan data. Subsequently, the touch driver sequentially provides driving signals to the even-numbered driving lines, and the signal processor sequentially detects sensing signals corresponding to the even-numbered driving lines from the even-numbered sensing lines and sequentially generates a fourth signal. Scan data can be obtained.

According to the embodiments of the present invention as described above, in order to obtain scan data constituting one frame, driving signals may be selectively provided to odd or even driving lines, and sensing signals may be odd and And / or from even numbered sensing lines. Accordingly, power consumption of the touch panel may be greatly reduced as compared with the case in which the touch panel is operated in the full scan mode.

1 is a block diagram illustrating a smart device using a touch integrated circuit according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a touch panel and a touch integrated circuit shown in FIG. 1.

3 and 4 are schematic views for explaining a touch panel scanning method according to an embodiment of the present invention.

5 is a schematic diagram illustrating a full scan mode of a touch panel.

6 to 9 are schematic views for explaining a touch panel scanning method according to another embodiment of the present invention.

The invention is now described in more detail with reference to the accompanying drawings showing embodiments of the invention. However, the present invention should not be construed as limited to the embodiments described below and may be embodied in various other forms. The following examples are provided to fully convey the scope of the invention to those skilled in the art, rather than to allow the invention to be fully completed.

When an element is described as being disposed or connected on another element or layer, the element may be placed or connected directly on the other element, and other elements or layers may be placed therebetween. It may be. Alternatively, where one element is described as being directly disposed or connected on another element, there may be no other element between them. Terms such as first, second, third, etc. may be used to describe various items such as various elements, compositions, regions, layers and / or parts, but the items are not limited by these terms. Will not.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Also, unless stated otherwise, all terms including technical and scientific terms have the same meaning as would be understood by one of ordinary skill in the art having ordinary skill in the art. Such terms, such as those defined in conventional dictionaries, will be construed as having meanings consistent with their meanings in the context of the related art and description of the invention, and ideally or excessively intuitional unless otherwise specified. It will not be interpreted.

Embodiments of the invention are described with reference to schematic illustrations of ideal embodiments of the invention. Accordingly, changes from the shapes of the illustrations, such as changes in manufacturing methods and / or tolerances, are those that can be expected sufficiently. Accordingly, embodiments of the invention are not to be described as limited to the particular shapes of the areas described as the illustrations, but include variations in the shapes, and the areas described in the figures are entirely schematic and their shapes. Is not intended to describe the precise shape of the region nor is it intended to limit the scope of the invention.

1 is a block diagram illustrating a smart device using a touch integrated circuit according to an exemplary embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating the touch panel and the touch integrated circuit illustrated in FIG. 1.

1 and 2, a smart device 100 generally includes a touch panel 110, a display panel 120 disposed below the touch panel 110, and a touch connected to the touch panel 110. An integrated circuit 130 and an application processor 140 for operating an application program according to the signals detected by the touch integrated circuit 130 may be included.

As the touch panel 110, for example, a mutual capacitance type touch panel may be used.

As illustrated in FIG. 2, the touch panel 110 may include a plurality of driving lines 112 and sensing lines 114 that vertically cross the driving lines 112. The sensing lines 114 may be disposed on the driving lines 112, and an insulating layer (not shown) may be disposed between the driving lines 112 and the sensing lines 114. .

According to an embodiment of the present disclosure, the touch integrated circuit 130 may include a touch driver 132 for providing driving signals to the driving lines 112 of the touch panel 110, and the touch panel 110 of the touch panel 110. A signal processor 134 for detecting electrical signals generated from the sensing lines 114, that is, sensing signals, and converting the electrical signals into digital signals, and the touch driver 132 and the signal processor 134. The controller 136 may control an operation of the control unit and transmit a command corresponding to the digital signals to the application processor 140.

The smart device 100 may execute a low power mode to reduce power consumption, and the display panel 120 may be turned off in the low power mode.

For example, the low power mode may be executed through a power button (not shown) of the smart device 100. Alternatively, when the state in which the touch signal is not input continues for a preset time, the low power mode is automatically executed. It may be. In particular, the low power mode may be executed while a sound source playing program such as a music player is executed.

The touch panel scanning method according to an exemplary embodiment of the present invention uses the touch panel 110 while the low power mode of the display panel 120 is executed as described above, that is, while the display panel 120 remains off. It may be used to detect an input touch signal or gesture. According to an embodiment of the present invention, the touch integrated circuit 130 may be operated in a partial scan mode to reduce power consumption of the touch panel 110.

3 and 4 are schematic diagrams for describing a touch panel scanning method according to an embodiment of the present invention, Figure 5 is a schematic diagram for explaining a full scan mode of the touch panel.

3 and 4, the partial scan mode of the touch panel 110 may be executed while the display panel 120 is operated in the low power mode. That is, the partial scan mode of the touch panel 110 may be used to detect the touch signal or gesture while the display panel 120 is kept off.

According to an embodiment of the present invention, a driving signal on odd-numbered or even-numbered

driving lines

112A or 112B of the driving lines 112 to detect the touch signal or gesture while the partial scan mode is executed. May be provided and sensing signals corresponding to the driving signals may be received from the sensing lines 114.

For example, the first scan data constituting the first frame sequentially provides driving signals to the odd-numbered driving lines 112A and senses received from the sensing lines 114 as shown in FIG. 3. May include signals. That is, as shown in FIG. 3, the first scan data includes sensing signals obtained after providing the first driving signal D1, sensing signals obtained after providing the third driving signal D3, Sensing signals obtained after providing the fifth driving signal D5 and sensing signals obtained after providing the seventh driving signal D7 may be included.

In addition, the second scan data constituting the second frame sequentially provides driving signals to the even-numbered driving lines 112B and the sensing signals received from the sensing lines 114 as shown in FIG. 4. It may include. That is, as shown in FIG. 4, the second scan data includes sensing signals obtained after providing the second driving signal D2, sensing signals obtained after providing the fourth driving signal D4, Sensing signals obtained after providing the sixth driving signal D6 and sensing signals obtained after providing the eighth driving signal D8 may be included.

The controller 136 may repeatedly acquire the first scan data and the second scan data to detect the touch signal or gesture.

As described above, each of the frames is configured by sensing signals received from the sensing lines 114 after driving signals are selectively provided to the odd or even driving

lines

112A or 112B. The power consumption of 110 can be greatly reduced.

When the display panel 120 is turned on, the operation mode of the touch panel 110 may be switched from the partial scan mode to the full scan mode. The full scan mode may be used to improve linearity and accuracy of the touch panel 110. Specifically, as shown in FIG. 5, driving signals may be sequentially provided to the driving lines 112, and scan data may be obtained using electrical signals detected from the sensing lines 114. Can be. That is, the driving signals may be sequentially provided to all the driving lines 112 in every frame, and the sensing signals may be sequentially obtained from all the scanning lines 114.

According to another embodiment of the present invention, the touch driver 132 selectively provides driving signals to the odd or even driving

lines

112A or 112B while the touch panel 110 is operated in the partial scan mode. The signal processor 134 may selectively receive sensing signals from odd or even sensing

lines

114A or 114B.

For example, the first scan data constituting the first frame sequentially provides driving signals to the odd-numbered driving lines 112A and is received from the odd-numbered sensing lines 114A, as shown in FIG. 6. The sensing signals may be included. That is, as shown in FIG. 6, the first scan data includes sensing signals obtained from the odd-numbered sensing lines 114A and the third driving signal D3 after providing the first driving signal D1. Sensing signals obtained from the odd-numbered sensing lines 114A after providing a fifth driving signal D5 and sensing signals obtained from the odd-numbered sensing lines 114A after providing a fifth driving signal D5 After providing the signal D7, the detection signal may include sensing signals obtained from the odd-numbered sensing lines 114A.

As shown in FIG. 7, the second scan data constituting the second frame sequentially provides driving signals to the odd-numbered driving lines 112A and senses the sensing signals received from the even-numbered sensing lines 114B. It may include. That is, as shown in FIG. 7, the first scan data includes sensing signals obtained from the even-numbered sensing lines 114B and the third driving signal D3 after providing the first driving signal D1. Sensing signals obtained from the even-numbered sensing lines 114B after providing a fifth driving signal, and sensing signals obtained from the even-numbered sensing lines 114B after a fifth driving signal D5 is provided. After providing the signal D7, the sensing signals may be obtained from the even-numbered sensing lines 114B.

As shown in FIG. 8, the third scan data constituting the third frame sequentially supplies driving signals to the even-numbered driving lines 112B and senses the sensing signals received from the odd-numbered sensing lines 114A. It may include. That is, as shown in FIG. 8, the third scan data includes sensing signals acquired from the odd-numbered sensing lines 114A and the fourth driving signal D4 after providing the second driving signal D2. Sensing signals acquired from the odd-numbered sensing lines 114A after providing the sixth driving signal and sensing signals acquired from the odd-numbered sensing lines 114A after providing the sixth driving signal D6 After providing the signal D8, the sensing signal may include sensing signals obtained from the odd-numbered sensing lines 114A.

As shown in FIG. 9, the fourth scan data constituting the fourth frame sequentially supplies driving signals to the even-numbered driving lines 112B and senses the sensing signals received from the even-numbered sensing lines 114B. It may include. That is, as shown in FIG. 9, the fourth scan data includes sensing signals obtained from the even-numbered sensing lines 114B and the fourth driving signal D4 after providing the second driving signal D2. Sensing signals obtained from the even-numbered sensing lines 114B after supplying?, Sensing signals obtained from the even-numbered sensing lines 114B and eighth driving after providing a sixth driving signal D6 After providing the signal D8, the sensing signal may include sensing signals obtained from the even-numbered sensing lines 114B.

The controller 136 may repeatedly acquire the first to fourth scan data in order to recognize the touch signal or gesture. At this time, the order of acquiring the first to fourth scan data may be changed, whereby the scope of the present invention is not limited.

As described above, each frame is selectively sensed from the odd or even sensing

lines

114A or 114B after drive signals are selectively provided to the odd or even driving

lines

112A or 112B. The power consumption of the touch panel 110 may be greatly reduced since the signal is configured by the signals.

The touch panel scanning method according to the embodiments of the present invention as described above may be preferably used while the smart device 100 is operated in a low power mode. In particular, the touch panel scanning method may be used to operate functions of an application program operated in an off state of the display panel 120 or an environment setting program of the smart device 100. For example, as shown in FIG. 1, the application program may include a sound source playback program, a flash on / off program, and the like. The configuration program may be a WiFi mode, a Bluetooth mode, a short range communication mode, or a ring tone. Mode, vibration mode, and the like.

For example, when the touch signal or gesture is input in the partial scan mode of the touch panel 110, the controller 136 transmits a command corresponding to the input touch signal or gesture to the application processor 140. Can be. The application processor 140 may execute an event corresponding to the command while keeping the display panel 120 in an off state.

According to the embodiments of the present invention as described above, the driving signals may be selectively provided to the odd-numbered or even-numbered

driving lines

112A or 114B to obtain scan data constituting one frame, and sensing The signals may be obtained from odd and / or even sensing lines 114A and / or 114B. Accordingly, power consumption of the touch panel 110 may be greatly reduced as compared with the case in which the touch panel 110 is operated in the full scan mode.

Therefore, embodiments of the present invention as described above can be preferably used for the manufacture of touch integrated circuits and touch panels.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

Sequentially providing driving signals to odd-numbered driving lines of the touch panel; And

And sequentially detecting sensing signals corresponding to the odd-numbered driving lines from at least some of the sensing lines of the touch panel to obtain first scan data.
The method of claim 1, further comprising: sequentially providing driving signals to even-numbered driving lines of the touch panel; And

And sequentially detecting sensing signals corresponding to the even-numbered driving lines from the at least some sensing lines to obtain second scan data.
The method of claim 1, wherein the first scan data is obtained from odd or even sensing lines of the touch panel.
The method of claim 1, wherein the first scan data is obtained from odd-numbered sensing lines of the touch panel.
The method of claim 4, further comprising: sequentially providing driving signals to the odd-numbered driving lines; And

And sequentially detecting sensing signals corresponding to the odd-numbered driving lines from even-numbered sensing lines of the touch panel to obtain second scan data.
The method of claim 5, further comprising: sequentially providing driving signals to even-numbered driving lines of the touch panel;

Acquiring third scan data by sequentially detecting sensing signals corresponding to the even-numbered driving lines from the odd-numbered sensing lines;

Sequentially providing driving signals to the even-numbered driving lines; And

And sequentially detecting sensing signals corresponding to the even-numbered driving lines from the even-numbered sensing lines to obtain fourth scan data.
A touch driver to provide driving signals to the driving lines of the touch panel;

A signal processor detecting sensing signals from sensing lines of the touch panel; And

A control unit for controlling the operation of the touch driver and the signal processor,

The touch driver sequentially provides driving signals to odd-numbered driving lines among the driving lines, and the signal processor sequentially detects sensing signals corresponding to the odd-numbered driving lines from at least some of the sensing lines. And acquire first scan data.
8. The touch driver of claim 7, wherein the touch driver sequentially provides driving signals to even-numbered driving lines of the touch panel, and wherein the signal processing unit senses corresponding to the even-numbered driving lines from the at least some sensing lines. And sequentially detecting the signals to obtain second scan data.
The touch integrated circuit of claim 7, wherein the first scan data is obtained from odd or even sensing lines among the sensing lines.
The touch integrated circuit of claim 7, wherein the first scan data is obtained from odd-numbered sensing lines among the sensing lines.
The touch driver of claim 10, wherein after the first scan data is acquired, the touch driver sequentially provides driving signals to the odd-numbered driving lines, and the signal processor is configured to provide the odd-numbered data from even-numbered sensing lines of the touch panel. And sensing second signals corresponding to the first driving lines to obtain second scan data.
The display device of claim 11, wherein after the second scan data is obtained, the touch driver sequentially provides driving signals to even-numbered driving lines of the touch panel, and the signal processor is further configured to provide the even-numbered signals from the odd-numbered sensing lines. Third sensing data is sequentially obtained by detecting sensing signals corresponding to the first driving lines,

After the third scan data is acquired, the touch driver sequentially provides driving signals to the even-numbered driving lines, and the signal processor is configured to sense signals corresponding to the even-numbered driving lines from the even-numbered sensing lines. And sequentially scan the signals to obtain fourth scan data.