TWI629632B - Touch processor and method - Google Patents

Abstract

The invention provides a touch processor and a touch method. The touch processor is electrically coupled to a touch panel, and the touch panel includes M driving electrodes and N sensing electrodes to perform the following steps: determining that at least one first driving electrode and a first external object touch or approach the At least one first sensing electrode; and performing a first mutual capacitance detection on X the driving electrodes and Y the sensing electrodes, wherein the X driving electrodes include the at least one first driving electrode and the Y sensing electrodes The measuring electrode includes the at least one first sensing electrode, and X is less than M and Y is less than or equal to N.

Description

Touch processor and touch method

The invention relates to a touch processor and a touch method, in particular to a touch processor and a touch method that detect movement of external objects.

A conventional mutual capacitive sensor includes an insulating surface layer, a first conductive layer, a dielectric layer, and a second conductive layer. The first conductive layer and the second conductive layer each have a plurality of first conductive layers. And a second conductive strip, these conductive strips may be composed of a plurality of conductive sheets and connecting wires connected in series with the conductive sheets.

During mutual capacitance detection, one of the first conductive layer and the second conductive layer is driven, and the other of the first conductive layer and the second conductive layer is detected. For example, driving signals are provided to each of the first conductive bars one by one, and corresponding to each of the first conductive bars to which a driving signal is provided, the signals of all the second conductive bars are detected to represent the first conductive to which the driving signal is provided. Capacitively coupled signal at the intersection between the strip and all second conductive strips. Thereby, the capacitive coupling signals representing the intersections between all the first conductive bars and the second conductive bars can be obtained, and become a capacitance value image.

Based on this, the capacitance value image when not touched can be obtained as a reference, and the difference between the reference and the subsequently detected capacitance value image can be used to determine whether it is approached or covered by an external conductive object, and further To determine the location to be approached or covered.

However, if a conductive substance crosses more than two conductive strips on the insulating surface layer, when it is not approached or covered by an external conductive object, the capacitive image may also change due to the capacitive coupling between the conductive substance and the conductive strip. This leads to misjudgment. For example, water stains on the insulation surface When more than two conductive strips are crossed, the capacitance value image will be changed, which is mistaken for finger pressure.

It can be seen that the above-mentioned prior art obviously has inconveniences and defects, and further improvement is needed. In order to solve the above-mentioned problems, the relevant manufacturers have made every effort to find a solution, but for a long time no applicable design has been developed and the general products and methods have no appropriate structure and methods to solve the above problems. Obviously, it is a problem that relevant industry operators are anxious to solve. Therefore, how to create a new technology is really one of the important R & D topics at present, and it has become a goal that the industry needs to improve.

The object of the present invention and its technical problems are solved by using the following technical solutions. According to a touch processor provided by the present invention, a touch panel is electrically coupled. The touch panel includes M driving electrodes and N sensing electrodes, and the touch processor performs the following steps: judging a first external At least one first driving electrode and at least one first sensing electrode that are touched or approached by the object; and performing a first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes, wherein the X driving electrodes Including the at least one first driving electrode and the Y sensing electrodes including the at least one first sensing electrode, X is less than M and Y is less than or equal to N.

The objective of the present invention and its technical problems can also be achieved by using the following technical solutions. A touch method according to the present invention is applied to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes, and the touch processor performs the following steps: judging a first external object touch At least one first driving electrode and at least one first sensing electrode that are touched or approached; and performing a first mutual capacitance detection on X the driving electrodes and Y the sensing electrodes, wherein the X driving electrodes include the At least one first driving electrode, the Y sensing electrodes include the at least one first sensing electrode, X is less than M, and Y is less than or equal to N.

The purpose of the present invention and its technical problems can also be solved by using the following technical methods Case to achieve. A touch processor according to the present invention is electrically coupled to a touch panel. The touch panel includes a plurality of first conductive bars and a plurality of second conductive bars. The touch processor performs the following steps: Sequentially provide driving signals to all the first conductive strips; when each first conductive strip is provided with a driving signal, the signals of all the second conductive strips are detected to obtain a first one-dimensional sensing corresponding to the first conductive strips Information; generating first-dimensional sensing information based on all the first-dimensional sensing information; determining whether at least one external object approaches or covers the touch panel according to the first-dimensional sensing information; and in accordance with the first When one piece of dimensional sensing information determines that at least one external object approaches or covers the touch panel, the touch processor further performs the following steps: according to the first piece of dimensional sensing information, determines that the at least one external object is close to or Covering at least one first one-dimensional coordinate and at least one second one-dimensional coordinate of the touch panel; respectively according to the at least one first one-dimensional coordinate and the at least one second one-dimensional coordinate The target determines at least one mutual capacitance detection range, and performs mutual capacitance detection on the at least one mutual capacitance detection range to generate a second unitary dimension sensing corresponding to the at least one mutual capacitance detection range. Information; and determining at least one third-dimensional coordinate and at least one fourth-dimensional coordinate based on the second-dimensional sensing information.

100‧‧‧Position detection device

110‧‧‧ Display

120‧‧‧Touch Panel

120A‧‧‧First sensing layer

120B‧‧‧Second sensing layer

130‧‧‧Drive / detection unit

140‧‧‧Conductive strip

160‧‧‧controller

161‧‧‧Processor

162‧‧‧Memory

170‧‧‧Host

171‧‧‧Central Processing Unit

173‧‧‧Storage Unit

11,13,14,16‧‧‧conductive sheet

12‧‧‧Second connection line

15‧‧‧The first connection line

17‧‧‧ insulating substrate

18‧‧‧ Insulation

19‧‧‧ Insulated Surface

21‧‧‧shielded conductive strip

140B, 22‧‧‧Second conductive strip

140A, 23‧‧‧ the first conductive strip

24‧‧‧ opening

25‧‧‧Conductive sheet

PWM‧‧‧Pulse Width Modulation Signal

S‧‧‧Signal

71‧‧‧The first touch panel

72‧‧‧Second touch panel

73, 74‧‧‧ Conductive bar coupled to ground potential

802-822‧‧‧step

EO1‧‧‧First External Object

EO2‧‧‧Second External Object

1A and 1B are schematic diagrams of a position detection system.

1C to 1F are schematic diagrams of the structure of the sensing layer.

2A and 2B are schematic diagrams of a capacitive sensor with a shielded conductive strip.

FIG. 2C is a schematic diagram of two-dimensional mutual capacitance detection.

FIG. 2D is a schematic diagram of full-screen drive detection.

FIG. 2E is a schematic flowchart of performing full-screen driving detection and then performing two-dimensional mutual capacitance detection according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram of full-screen drive detection and two-dimensional mutual capacitance according to a second embodiment of the present invention. Schematic diagram of the process of determining the position of the result of the type detection.

4A to 4C are schematic flowcharts of determining a position based on a result of full-screen drive detection and mutual capacitance detection according to a third embodiment of the present invention.

FIG. 5A is a schematic flowchart of updating a reference according to a fourth embodiment of the present invention.

FIG. 5B is a schematic flowchart of an update benchmark according to a fifth embodiment of the present invention.

FIG. 6 is a schematic flowchart of a touch panel communication according to a sixth embodiment of the present invention.

FIG. 7 is a schematic diagram of communication using a touch panel according to a seventh embodiment of the present invention.

FIG. 8A is a schematic flowchart of a touch method according to an embodiment of the present invention.

FIG. 8B is a schematic flowchart of a touch method according to an embodiment of the present invention.

FIG. 9A is a schematic diagram of detecting a first external object in a first period.

FIG. 9B is a schematic diagram of detecting a first external object in a second period.

FIG. 10A is a schematic diagram of detecting a first external object and a second external object in a first period.

FIG. 10B is a schematic diagram of detecting a first external object and a second external object in a second period.

The present invention will be described in detail in the following examples. However, with the exception of the disclosed embodiments, the scope of the present invention is not limited by these embodiments, but the scope of subsequent patent applications shall prevail. In order to provide a clearer description and enable ordinary people in the art to understand the invention, the parts in the diagram are not drawn according to their relative sizes. The proportions of certain sizes or other related dimensions may be highlighted. It appears exaggerated, and the irrelevant details have not been completely drawn in order to simplify the illustration.

Referring to FIG. 1A, the present invention provides a position detection device 100 including a touch panel 120 and a driving / detecting unit 130. The touch panel 120 has a sensing layer. In an example of the present invention, a first sensing layer 120A and a second sensing layer 120B may be included. The sensing layer 120A and the second sensing layer 120B have a plurality of conductive strips 140, respectively. The plurality of first conductive strips 140A of the first sensing layer 120A and the plurality of second conductive strips 140B of the second sensing layer 120B intersect. Stacked. In another example of the present invention, the plurality of first conductive stripes 140A and the second conductive stripes 140B may be disposed in a coplanar sensing layer. The driving / detecting unit 130 generates a sensing information according to the signals of the plurality of conductive bars 140. For example, in self-capacitance detection, the conductive strip 140 being driven is detected, and in mutual-capacitance detection, a portion of the conductive strip 140 not directly driven by the driving / detecting unit 130 is detected. In addition, the touch panel 120 may be disposed on the display 110, and a shielding layer (not shown) may be disposed between the touch panel 120 and the display 110 or may not be disposed. In a preferred example of the present invention, in order to make the thickness of the touch panel 120 thinner, there is no shielding layer disposed between the touch panel 120 and the display 110.

The position detection device 100 of the present invention may be applied to a computer system, as an example shown in FIG. 1B, and includes a controller 160 and a host 170. The controller includes a driving / detecting unit 130 to operatively couple the touch panel 120 (not shown). In addition, the controller 160 may include a processor 161 to control the driving / detecting unit 130 to generate sensing information. The sensing information may be stored in the memory 162 for the processor 161 to access. In addition, the host 170 constitutes the main body of the computing system, and mainly includes a central processing unit 171, a storage unit 173 for access by the central processing unit 171, and a display 110 for displaying a calculation result.

In another example of the present invention, the controller 160 and the host 170 include a transmission interface. The control unit transmits data to the host through the transmission interface. Those skilled in the art can infer that the transmission interface includes but is not limited to UART, USB, Various wired or wireless transmission interfaces such as I2C, Bluetooth, WiFi, and IR. In an example of the present invention, the transmitted data may be a position (such as a coordinate), a recognition result (such as a gesture code), a command, sensing information, or other controller 160 Available information.

In an example of the present invention, the sensing information may be initial sensing information generated by the control of the processor 161, and the host 170 may perform position analysis, such as position analysis, gesture determination, command recognition, and the like. . In another example of the present invention, the sensing information may be analyzed by the processor 161 first, and then the determined position, gesture, command, etc. may be submitted to the host 170. The present invention includes, but is not limited to, the foregoing examples. Those skilled in the art can infer the interaction between the other controller 160 and the host 170.

Please refer to FIG. 1C, which is a pattern of a capacitive touch panel, including a plurality of conductive plates and a plurality of connection lines. These connection lines include a plurality of first connection lines and a plurality of second connection lines. These first connecting lines are arranged in a first direction (such as one of horizontal or vertical), and connect a part of the conductive sheets to form a plurality of conductive bars arranged in the first direction. Similarly, the second connecting lines are arranged in a second direction (such as the other in the horizontal direction or the vertical direction), and connect another part of the conductive sheets to form a plurality of conductive bars arranged in the second direction.

These conductive bars (the first conductive bar and the second conductive bar) may be made of transparent or opaque materials, for example, they may be made of transparent indium tin oxide (ITO). It can be divided into single-layer structure (SITO; Single ITO) and double-layer structure (DITO; Double ITO) in structure. Those of ordinary skill in the art can infer the materials of other conductive strips, and will not repeat them here. For example, carbon nanotubes.

In this example, the vertical direction is used as the first direction and the horizontal direction is used as the second direction. Therefore, the vertical conductive bar is the first conductive bar, and the horizontal conductive bar is the second conductive bar. Those skilled in the art can infer that the above description is an example of the invention and is not intended to limit the invention. For example, a horizontal direction may be used as the first direction, and a vertical direction may be used as the second direction. In addition, the number of the first conductive bars and the number of the second conductive bars may be the same or different. For example, the first conductive bar has N bars and the second conductive bar has M bars.

FIG. 1E is a cross-sectional view at II in FIG. 1C, including an insulating substrate 17 (substrate), a part of the second conductive strip (including the conductive sheet 11, the second connection line 12, and the conductive sheet 13), the insulating layer 18, and A part of the first conductive strip (including the first connection line 15) and the insulating surface layer 19. In an example of the present invention, the base 17, the insulating layer 18, and the insulating surface layer 19 may be made of transparent or opaque materials, such as glass or plastic film. Those skilled in the art can infer other examples in this example. The composition method is not repeated here.

In an example of the present invention, FIG. 1D is a cross-sectional view at II-II in FIG. 1C, and is a schematic structural diagram of a double-layer capacitive touch panel, including an insulating substrate 17 (substrate) and a part of a second conductive strip. (Including the second connection line 12), the insulating layer 18, and a part of the first conductive strip (including the conductive sheet 14, the first connection line 15, and the conductive sheet 16) and the insulating surface layer 19. In other words, in an example of the present invention, the capacitive touch panel includes an insulating surface layer, a first sensing layer having the first conductive strip, an insulating layer, and an The second sensing layer. In another example of the present invention, the capacitive touch panel is a rectangle having two opposite long sides and two opposite short sides, wherein the first conductive strip is arranged in parallel with the opposite two short sides, and the The second conductive strips are arranged in parallel with two opposite long sides.

In an example of the present invention, FIG. 1F is a cross-sectional view at II in FIG. 1C, which is a schematic structural diagram of a single-layer capacitive touch panel, including an insulating substrate 17 (substrate) and a part of a second conductive strip ( It includes the second connection line 12), the insulating layer 18, and a part of the first conductive strip (including the conductive sheet 14, the first connection line 15, and the conductive sheet 16) and the insulating surface layer 19. The conductive strips 14 and 15 of the first conductive strip are coplanar with the second connection line 12 of the second conductive strip, and the first connection line 15 is framed. The bridge way crosses the second connection line 12, wherein the first connection line 15 and the second connection line 12 are isolated by an insulating layer 18. Those of ordinary skill in the art can infer other bridging methods, which are not repeated here. For example, compared to the upward bridge method of this example, the downward bridge method may be used.

A guarding or shielding conductive strip can be added between the first conductive strip and the second conductive strip. The shielding conductive strip can increase the amount of change in the detected mutual electrical coupling signal, and can also reduce the amount of external conductive objects. Noise and negative touch caused by flowing from a capacitive touch panel to an external conductive object through an external conductive object and then flowing into the capacitive touch panel. When the shielding conductive strip is interposed between the first conductive strip and the second conductive strip, and the shielding conductive strip is provided with a DC potential or is coupled to the system ground, the shielding conductive strip shields the first conductive strip and the second conductive strip. The direct capacitive coupling between the strips increases the amount of change in the mutual electrical coupling signal that can be affected by external conductive objects coupled to the ground.

For example, FIG. 2A and FIG. 2B are schematic diagrams of a capacitive sensor with a shielded conductive strip. The shielded conductive strips 21 and the first conductive strips 23 are staggered and exposed to each other. 24 makes the conductive sheet 25 of the second conductive strip 22 and the first conductive strip 22 be exposed to each other.

Referring to FIG. 2C, when performing two-dimensional mutual capacitance detection, an AC driving signal (such as a pulse width modulation signal PWM) is sequentially provided to each of the first conductive bars 23 and passes through the second conductive The signal S of the strip 22 obtains one-dimensional sensing information corresponding to each conductive strip to which a driving signal is provided, and the sensing information corresponding to all the first conductive strips 23 constitutes two-dimensional sensing information. The one-dimensional sensing information may be generated based on the signal of the second conductive strip 22, or may be generated based on a difference between the signal of the second conductive strip 22 and a reference. In addition, the sensing information can be based on the signal's current, voltage, capacitive coupling, The amount of charge or other electronic properties is generated and can exist in analog or digital form. In this example, the driving signal is provided to one of the first conductive strips 23 in turn. Those skilled in the art can infer that the driving signal is provided to adjacent two of the first conductive strips 23 in turn. Or more.

For example, in an example of the present invention, a driving signal is alternately provided to one of the first conductive bars, and when a driving signal is provided to each of the first conductive bars in the first conductive bar, Detect the signals of all the second conductive strips to obtain one-dimensional sensing information corresponding to the first conductive strips provided with driving signals based on the signals of all the second conductive strips, and collect each of the first One-dimensional sensing information of a conductive bar generates one-dimensional sensing information. In another example of the present invention, one pair of the first conductive strips is alternately provided with a driving signal, and the driving signals are simultaneously provided for each pair of the first conductive strips in the first conductive strip. When detecting the signals of all the second conductive strips to obtain one-dimensional sensing information of the first conductive strips corresponding to the provided driving signals based on the signals of all the second conductive strips, and collecting each corresponding to the provided driving signals The one-dimensional sensing information of the first conductive strip of the first conductive strip generates a two-dimensional sensing information.

A person with ordinary knowledge in the technical field can infer that the position of each external conductive object coupled to the ground is determined according to the two-dimensional sensing information. For example, a watershed algorithm, a connected object method, or other image segmentation methods are used to determine the proximity or touch range of each external conductive object coupled to the ground, and then further determine the location. For example, the centroid position is calculated based on the signal value of the approaching or touching range of the external conductive object. When no external conductive object approaches or covers the touch panel, or the system does not determine that the external conductive object approaches or covers the touch panel, the position detection device can be determined by the The signal from the second conductive strip generates a reference. The sensing information may be generated based on the signal of the second conductive bar, or generated based on the signal of the second conductive bar minus the reference. In the former, the difference between the sensing information and the reference can be used to judge the positive touch and / or the negative touch, while the latter is a better example of the present invention. The difference between the sensing information itself and the reference can be directly used to judge Positive and / or negative touch. The benchmark may be obtained during the initial stage of the position detection device and / or iteratively obtained during the operation phase of the position detection device.

In the following description, a positive touch is caused when an external conductive object approaches or covers the touch panel, and the part corresponding to the positive touch in the sensing information is regarded as the positive touch sensing information. Conversely, the part of the sensing information that exhibits the opposite characteristics to the positive touch sensing information is collectively called negative touch sensing information, which indicates a negative touch. The formation of positive touch sensing information is not necessarily caused by external conductive objects approaching or covering the touch panel, and the proximity of external conductive objects to or covering the touch panel is only one of the reasons for forming a positive touch. The sensing information includes, but is not limited to, one-dimensional sensing information or two-dimensional sensing information. In addition, the formation of a negative contact does not necessarily have an external conductive object or any substance located in the corresponding position. Furthermore, the positive touch sensing information may be sensing information corresponding to or similar to that caused by a positive touch, and not necessarily caused by an actual external conductive object approaching or covering the touch panel. For example, when the one-dimensional sensing information presents the signal value of the conductive bar, the positive touch sensing information can be a positive value that is increasing and decreasing, or a negative value that is decreasing and increasing, and the negative touch sensing information and the positive touch sensing information in contrast. For another example, when the one-dimensional sensing information shows the difference between the conductive strip and another conductive strip, the positive touch sensing information can be a positive value that increases and then decreases and a negative value that decreases and then increases, that is, a positive value first. Then it is negative, and the negative touch sensing information is opposite to the positive touch sensing information.

When a conductive substance is adhered to the insulating surface layer, such as water, the sensing information may vary due to the size of the area to which the conductive substance adheres. When the area where the conductive substance is attached is small, Capacitive coupling between conductive materials and conductive strips may present negative touch sensing information. However, when the area to which the conductive substance is attached is large, the capacitive coupling between the conductive substance and the conductive strip may present positive touch sensing information in addition to negative touch sensing information. When water is distributed in many areas, many positive touch sensing information and negative touch sensing information may be presented, causing misjudgment.

If only negative touch sensing information is displayed in the sensing information, but no positive touch sensing information is present, it can be determined that the insulating surface is adhered with a conductive substance. In addition, if negative touch sensing information exists in the sensing information, and positive touch sensing information exists on the edge of the negative touch sensing information, it can also be determined that a conductive substance is attached to the insulating surface layer. When it is determined that a conductive substance is attached to the insulating surface layer, the system or the user may be prompted to attach the conductive substance to the insulating surface layer and wait for further disposal. For example, the update of the reference may be suspended or the position of any detected external conductive object may not be provided until the adhesion of the conductive material is eliminated. However, the above-mentioned situation is limited to that the adhesion of the conductive material is small.

In addition, the present invention proposes one-dimensional mutual capacitive detection with full screen driven (hereinafter referred to as full screen driven detection). Please refer to FIG. 2D. In a preferred example of the present invention, the position detection device must be capable of simultaneously providing driving signals to all the first conductive strips, hereinafter referred to as simultaneously providing driving signals (such as pulse width modulation signals PWM) to All the first conductive bars are driven in full screen. At each full-screen driving, at least one dimension of sensing information is generated according to the signals of all or part of the conductive strips. As mentioned earlier, the one-dimensional mutual-capacitance detection of full-screen driving also has its benchmark. In addition, when the shielded conductive strips 21 are present on the touch panel, the full-screen driving further includes providing driving signals to all the shielded conductive strips 21 simultaneously, that is, simultaneously providing the driving signals to all of the first conductive strips 23 and the shielded conductive stripes 21. In the following description, in the case of full-screen driving detection, the first conductive strips 23 that provide driving signals at the same time also mean that the driving signals are provided to all at the same time. Of the shield conductive strip 21. If only the first conductive strips 23 and the second conductive strips 22 are present on the touch panel, and the shielded conductive strips are not present, the full-screen driving only includes driving signals provided to all the first conductive strips at the same time.

If only a driving signal is provided to a single conductive strip, the driving signal may be capacitively coupled to other conductive strips through the attached conductive substance, causing negative or positive contact. When all the first conductive strips of the full screen are provided with driving signals, the potential of each first conductive strip is the same, and the above-mentioned problem will not occur.

In addition, when all the first conductive bars of the full screen are provided with driving signals, the approach or coverage of external conductive objects will present positive touch sensing information, which can be used to determine whether there is the approach or coverage of external conductive objects, Proximity or coverage of one-dimensional coordinates of a conductive strip that is close to or covered, and / or an external conductive object.

For example, a driving signal is provided to all the first conductive strips at the same time, and when the first conductive strip is simultaneously provided with a driving signal, the signals of all the second conductive strips are detected to obtain the signals of all the second conductive strips. One-dimensional sensing information. When each value of the one-dimensional sensing information is a signal representing one of the second conductive bars, a threshold value may be used to determine whether there is at least one value in the one-dimensional sensing information that exceeds the threshold value. When at least one value exceeds the threshold value, it means that at least one external conductive object coupled to the ground approaches or touches the touch panel.

In an example of the present invention, when the touch panel has the aforementioned shielding conductive strip. When performing full-screen driving detection, the driving signal is provided to the shielded conductive strip and the first conductive strip simultaneously. When two-dimensional mutual capacitance detection is performed, when a driving signal is provided, the shielding conductive strip is simultaneously provided with a DC potential or a ground coupled to the system.

For example, a detection device for a touch panel according to the present invention includes a touch panel. The touch panel includes a plurality of first conductive bars, a plurality of second conductive bars, and a plurality of shielded conductive bars. A first conductive bar, a second conductive bar, and a shielded conductive bar are exposed to each other; a controller, the controller performs a full-screen drive detection, including: simultaneously providing a driving signal to all the first conductive bars and all the shielded conductive bars; At the same time, when a driving signal is provided to all the first conductive bars and all the shielded conductive bars, the mutual capacitive coupling signals of all the second conductive bars are detected to obtain a one-dimensional sensing based on the signals of all the second conductive bars. Information; and determining whether at least one external conductive object coupled to the ground approaches or covers the touch panel according to one-dimensional sensing information; and the controller determining that at least one external conductive object coupled to the ground is approaching based on one-dimensional sensing information Or when covering the touch panel, perform a two-dimensional mutual capacitance detection to obtain a two-dimensional sensing information, and judge based on the two-dimensional sensing information The position of each external conductive object coupled to the ground, wherein the two-dimensional mutual capacitance detection includes: alternately providing a driving signal to different one or more conductive bars in the first conductive bar, and providing all shielded conductive Strip DC potential; each time a different one or more conductive strips in the first conductive strip are provided with a driving signal, the signals of all the second conductive strips are detected to obtain the interaction based on all the second conductive strips. The capacitively coupled signal generates one-dimensional sensing information corresponding to the first conductive strip provided with the driving signal; and gathers one-dimensional sensing information corresponding to the first conductive strip provided with the driving signal to generate a two-dimensional sense Test information.

In addition, the one-dimensional sensing information can also be generated in a manner of difference or double difference. For example, when each value of the one-dimensional sensing information represents the difference of the signals of one of the pair of the second conductive strips, it may be determined whether at least one of the one-dimensional sensing information is located adjacent to each other. A zero-crossing between a positive value and a negative value of At least one zero intersection indicates that at least one external conductive object coupled to the ground is approaching or touching the touch panel. Wherein, the “adjacent” described in the “adjacent” and “negative” means that there is no value or only zero value between the positive value and the negative value. In addition, in an example of the present invention, values falling within a predetermined range of zero values are all considered as zero values, where the range of zero values includes zero. Since the capacitive touch panel detection is susceptible to interference from external noise, the use of a zero value range can reduce misjudgment and purify the data singularity. In an example of the present invention, it is assumed that the signals of the second conductive strips are S1, S2, ..., Sn, respectively, and the one-dimensional sensing information uses a difference, and the value of the one-dimensional sensing information depends on The sequence is S1-S2, S2-S3, ..., Sn-1-Sn.

When each value of the one-dimensional sensing information represents the difference between the signal differences of the two pairs of second conductive strips in the second conductive strip, a threshold value may be used to determine whether the one-dimensional sensing information exceeds the At least one value of the threshold value. When at least one value exceeds the threshold value, it means that at least one external conductive object coupled to the ground approaches or touches the touch panel. In addition, it is also possible to determine whether there is at least one value between two zero crossings that exceeds the threshold value. When there is at least one value between two zero crossings that exceeds the threshold value, it means that at least one is at least one coupled to the ground. An external conductive object approaches or touches the touch panel. In an example of the present invention, it is assumed that the signals of the second conductive strips are S1, S2, ..., Sn, respectively, and the one-dimensional sensing information is a value of double difference and one-dimensional sensing information. The order is ((S2-S3)-(S1-S2)), ((S3-S4)-(S2-S3)), ..., ((Sn-1-Sn)-(Sn-2- Sn-1)). In a preferred mode of the present invention, the one-dimensional sensing information is a double difference.

In brief, in the foregoing example, it may be determined whether there is a value exceeding the threshold value or a zero crossing to determine whether at least one external conductive object coupled to the ground approaches or touches the touch panel. Those with ordinary knowledge in the technical field can infer that one-dimensional sensing data The signal may also be in a form other than a signal value, a difference value, or a double difference value, for example, each value is a difference between non-adjacent signal values, which is not limited in the present invention.

In a best mode of the present invention, the position detection device must have the ability to simultaneously provide driving signals to all the first conductive bars and the ability to detect the second conductive bars. That is, while driving in full screen, one-dimensional sensing information is generated according to the signal of the second conductive strip. The detection of the second conductive strips can be scanning one by one, scanning multiple strips at the same time, and scanning all the second conductive strips simultaneously to obtain the corresponding sensing information of all the second conductive strips, which is referred to as full-screen drive detection in the following description. . In other words, the full-screen driving detection includes detecting the mutual capacitive coupling signals of all the detected conductive bars (such as all the second conductive bars) when driving all the driven conductive bars (such as all the first conductive bars).

With sufficient resolution, as the size of the touch panel increases, the number of conductive bars also increases. However, the controller can be used to detect the pins of the conductive bars at the same time. In the two-dimensional mutual-capacitance detection, only a single axial conductive strip is needed for detection, such as the aforementioned second conductive strip. Therefore, as long as the position detection device increases the capability of full-screen driving, it can directly use the original structure for detecting the second conductive strip to perform full-screen driving detection. In a preferred example of the present invention, the number of the second conductive bars is smaller than the number of the first conductive bars.

In another example of the present invention, the position detection device must be capable of simultaneously providing driving signals to all the first conductive bars and capable of detecting all the conductive bars. That is, while driving in full screen, the first one-dimensional sensing information is generated according to the signal of the first conductive strip, and the second one-dimensional sensing information is generated according to the signal of the second conductive strip. Compared to the previous example, the position detection device must also have the ability to detect the first conductive strip.

To sum up, in the full-screen drive detection, if there is no approach of external conductive objects Or covering, whether or not the conductive substance is attached, the positive touch will not be determined, that is, the sensing information will not present the positive touch sensing information. In an example of the present invention, the full screen driving detection is used to determine whether there is a positive touch or whether an external conductive object is approaching or covering. In another example of the present invention, a conductive bar that is judged to be approached or covered by an external conductive object is detected by full-screen driving detection, which may be only the covered second conductive bar, or the covered first conductive bar and Second conductive strip. In still another example of the present invention, coordinates are detected by full-screen driving. One-dimensional coordinates can be determined from a single one-dimensional sensing information, or the aforementioned first one-dimensional sensing information and the second one-dimensional can be used. The sensing information judges the first-dimensional coordinate and the second-dimensional coordinate respectively, that is, the two-dimensional coordinate.

The aforementioned position detection device may have the capabilities of full-screen drive detection and two-dimensional mutual capacitance detection. For example, the driving signal may be provided to all, multiple or one first conductive strip at the same time, and one-dimensional sensing information or two-dimensional sensing information is detected by the second conductive strip.

Please refer to FIG. 2E, which is a schematic flowchart of a full-screen driving detection and then a two-dimensional mutual capacitance detection according to the first embodiment of the present invention. As shown in step 210, full-screen driving detection is performed to generate one-dimensional sensing information. Next, as shown in step 220, it is determined whether to perform two-dimensional mutual capacitance detection according to one-dimensional sensing information. For example, if one-dimensional sensing information determines that an external conductive object is approaching or covering, as shown in step 230, two-dimensional mutual capacitance detection is performed to generate two-dimensional sensing information, and then as shown in step 240, Determine the position of the external conductive object according to the two-dimensional sensing information.

In step 220, if it is not determined that the external conductive object is approaching or covering, then return to step 210 and perform full-screen driving detection again. In an example of the present invention, a full screen is performed. The period of driving detection is fixed, that is, during a period of continuous full-screen driving detection, the interval between two adjacent full-screen driving detections is one detection period. In any detection cycle, if the approach or coverage of external conductive objects is not judged, it only needs to consume the power for one full-screen drive detection, otherwise, it needs to consume the power for one full-screen drive detection and perform N-dimensional one-dimensional interactions. Capacitive detection (that is, two-dimensional mutual capacitance detection) power. The aforementioned detection cycle can be adjusted according to requirements. For example, in the power saving mode, the detection cycle time can be lengthened to save power, and in the normal mode, the detection cycle can be shortened to increase the detection frequency. That is, the rate of reporting points (coordinates) is increased. In contrast, in another example of the present invention, the detection period may not be fixed. For example, in step 220, it is determined that there is no approach or coverage of an external conductive object, and then step 210 is performed again. For example, in normal mode, unless two-dimensional full mutual-capacitance detection is required, full-screen drive detection is repeatedly performed. If it is necessary to perform two-dimensional full mutual capacitance detection, perform step 210 after performing step 230 or after performing steps 230 and 240.

In addition, full-screen drive detection is performed based on a first detection frequency. After a preset time or number of times, there is no approach or coverage of external conductive objects. Instead, full-screen drive detection is performed based on a second detection frequency. Until the approach or coverage of the external conductive object is detected, then change back to full screen drive detection based on the first detection frequency. For example, the driving signal is provided to all the first conductive strips at a first frequency, and after a preset time or number of times is provided to all the first conductive strips at the first frequency, it is determined that there is an external conduction coupled to the ground. When an object approaches or covers the touch panel, the driving signal is provided to all the first conductive bars at a second frequency, where the first frequency is faster than the second frequency. In addition, when the driving signal is provided to all the first conductive bars at a second frequency, when it is determined that an external conductive object coupled to the ground approaches or covers the touch panel, the driving signal is provided to all the first conductive bars at a first frequency. article.

In addition, after the two-dimensional mutual-capacitance detection is performed to determine the approach or coverage of an external conductive object, the two-dimensional mutual-capacitance detection can be continued, and steps 210 and 220 are skipped, and no full-screen drive detection is performed. Until the two-dimensional mutual capacitance detection does not judge the approach or coverage of external conductive objects.

Accordingly, in an example of the present invention, when a driving signal is provided to all the first conductive bars at the same time, the mutual capacitive coupling signals of all the second conductive bars are detected to obtain signals based on all the second conductive bars. Generate one-dimensional sensing information and determine whether at least one external conductive object coupled to the ground approaches or covers the touch panel based on the one-dimensional sensing information to determine whether to perform a two-dimensional mutual capacitance detection, where the two-dimensional mutual capacitance detection Capacitive detection is the detection of the mutual capacitive coupling signals of all the second conductive strips when a part of the first conductive strips is provided with a driving signal.

Please refer to FIG. 3, which is a schematic flowchart of determining a position based on a result of full-screen drive detection and two-dimensional mutual capacitance detection according to a second embodiment of the present invention. As shown in step 310, full screen driving detection is performed to generate one or two one-dimensional sensing information. For example, one-dimensional sensing information is generated according to the signals of the first conductive bar or the second conductive bar, or corresponding signals are generated according to the signals of the first conductive bar and the second conductive bar. The first one-dimensional sensing information on the first conductive strip and the second one-dimensional sensing information corresponding to the second conductive strip. Next, as shown in step 320, it is determined whether there is at least one external conductive object approaching or covering according to the one-dimensional sensing information. If there is no approach or coverage of at least one external conductive object, proceed to step 310; otherwise, as shown in step 330, determine the conductive strip that is approached or covered by the external conductive object according to the one-dimensional sensing information, and proceed as step As shown in 340, at least one mutual capacitance is determined according to a conductive strip approached or covered by an external conductive object. Detection range. Next, as shown in step 350, mutual capacitance detection is performed on the mutual capacitance detection range, and a two-dimensional sensing is generated based on mutual capacitive coupling at all overlaps in the mutual detection range. Information. For example, the capacitive coupling of overlapping touches outside the mutual capacitance detection range is designated as a preset value (such as a zero value), and detected by combining with the capacitive coupling according to the mutual capacitance detection range. The value obtained produces a two-dimensional sensing information. Next, as shown in step 360, the position of each external conductive object is determined according to the two-dimensional sensing information. After that, step 310 is continued. The aforementioned two-dimensional sensing information may also be an incomplete full-screen image, showing only the capacitive coupling in the mutual capacitance detection range, and then determining the position of each external conductive object.

In an example of the present invention, one-dimensional sensing information is generated according to the signal of the first conductive strip, and the mutual capacitance detection range is all overlaps of the first conductive strip approached or covered by an external conductive object. Office. In other words, the driving signals are provided to the first conductive strips that are approached or covered by external conductive objects one by one, and when each first conductive strip is provided with a driving signal, two-dimensional sensing information is generated based on the signals of all the second conductive strips. . Compared with two-dimensional full mutual capacitance detection, the advantages of this example can save a lot of time.

In another example of the present invention, one-dimensional sensing information is generated according to the signal of the second conductive strip, and the mutual capacitance detection range is all intersections of the second conductive strip approached or covered by an external conductive object. Overlap. In other words, the driving signals are provided to the first conductive strips one by one, and when each of the first conductive strips is provided with a driving signal, a two-dimensional sensing is generated based on the signal of the second conductive strip approached or covered by an external conductive object. Information. Compared with the two-dimensional full mutual capacitance detection, this example can ignore the noise outside the mutual capacitance detection range.

In a preferred example of the present invention, the first conductive strip and the The signal of the second conductive bar generates the first one-dimensional sensing information and the second one-dimensional sensing information, and the mutual capacitance detection range is between the first conductive bar and the second conductive bar which are approached or covered by an external conductive object All overlaps. In other words, the driving signal is provided to the first conductive strip approached or covered by the external conductive object one by one, and when each first conductive strip is provided with the driving signal, the driving signal is based on the signal of the second conductive strip approached or covered by the external conductive object. Generate two-dimensional sensing information. Compared with two-dimensional full mutual capacitance detection, the advantages of this example can save a lot of time and ignore the noise outside the mutual capacitance detection range.

In addition, in an example of the present invention, it can be determined that at least one external conductive object coupled to the ground approaches or covers the touch panel according to the first-dimensional sensing information, including: sensing information according to the first-dimensional sensing information. Determine the first-dimensional coordinates of each external conductive object coupled to the ground; detect the signals of all the second conductive strips to obtain a second-dimensional sensing information based on the signals of all the second conductive strips; according to the second The one-dimensional sensing information determines a second-dimensional coordinate of each external conductive object coupled to the ground; a two-dimensional coordinate formed by each first-dimensional coordinate corresponding to each second-dimensional coordinate, respectively; respectively The overlap between the first conductive strip and the second conductive strip closest to each two-dimensional coordinate is taken as the corresponding overlap; and the detected overlap corresponding to each two-dimensional coordinate is performed separately. Capacitive detection detects a mutual capacitive coupling signal at the corresponding overlap of each two-dimensional coordinate to determine each of the external conductive objects coupled to the ground. Dimensional coordinates.

The mutual capacitance detection for any detected overlap may be providing a driving signal to at least one first conductive strip including the first conductive strip overlapped at the detected overlap, and detecting The measurement includes a signal of a second conductive strip overlapping at the detected overlap to detect a mutual capacitive coupling signal at each overlap. Where the overlap on the same first conductive strip may be Therefore, when the driving signal is provided to at least one first conductive strip including the first conductive strip overlapping at the detected overlap, the driving signal is simultaneously detected. The signal of the two-dimensional coordinate of the external conductive object coupled to the ground exceeds a threshold value.

In another example of the present invention, determining that at least one external conductive object coupled to the ground approaches or covers the touch panel according to the first one-dimensional sensing information and / or the second one-dimensional sensing information includes: One-dimensional sensing information or a mutual-capacitance detection range is determined based on the first-dimensional sensing information and the second-dimensional sensing information; mutual-capacitance detection is performed on the mutual-capacitance detection range, based on Mutual capacitive coupling signals at the intersections of all the first conductive bars and the second conductive bars in the mutual capacitance detection range generate a two-dimensional sensing information; and each of them is determined based on the two-dimensional sensing information. Location of external conductive objects coupled to ground.

The mutual capacitance detection range may be determined based on the first one-dimensional sensing information or the first one-dimensional sensing information and the second one-dimensional sensing information to determine that an external conductive object coupled to the second is approaching or touching. Where all the first conductive strips on the first conductive strip overlap with the second conductive strip, or where all the first conductive strips approached or touched by the external conductive object coupled to the first conductive strip Decide. Please refer to FIG. 4A, which is a schematic flowchart of determining a position based on a result of full-screen drive detection and mutual capacitance detection according to a third embodiment of the present invention. As shown in step 410, full-screen driving detection is performed to generate a one-dimensional sensing information. Next, as shown in step 420, it is determined whether there is at least one external conductive object approaching or covering according to the one-dimensional sensing information. If there is no approach or coverage of at least one external conductive object, step 410 is continued; otherwise, as shown in step 430, at least one first-dimensional coordinate is determined according to the one-dimensional sensing information. Then, according to step 440, at least one first mutual capacitance detection range is determined according to at least one conductive bar corresponding to the one-dimensional coordinate, and according to step 450, It is shown that mutual capacitance detection is performed on the first mutual capacitance detection range to determine at least one second one-dimensional coordinate corresponding to each first one-dimensional coordinate. For example, two first one-dimensional coordinates are determined in step 430, and two mutual capacitance detection ranges are determined by two conductive bars closest to the two first one-dimensional coordinates in step 440, and step 450 Inter-electric detection is performed to generate one-dimensional sensing information corresponding to each first one-dimensional coordinate, and further to determine at least one second one-dimensional coordinate corresponding to each first one-dimensional coordinate. The first one-dimensional coordinate and the second one-dimensional coordinate may form a two-dimensional coordinate, such as (first one-dimensional coordinate, second one-dimensional coordinate) or (second one-dimensional coordinate, first one-dimensional coordinate).

For example, when driving signals are provided to the first conductive strips at the same time, the signals of all the second conductive strips are detected to obtain first-dimensional sensing information based on the signals of all the second conductive strips. In addition, determining that an external conductive object coupled to the ground is close to or covering the touch panel according to the one-dimensional sensing information further includes: determining at least one first-dimensional coordinate according to the first-dimensional sensing information; and according to each first A one-dimensional coordinate determines a first mutual capacitance detection range, and a mutual capacitance detection is performed on the first mutual capacitance detection range to generate a second corresponding to each first one-dimensional coordinate. One-dimensional sensing information; generating at least one second-dimensional coordinate corresponding to each first-dimensional coordinate based on a second-dimensional sensing information corresponding to each first-dimensional coordinate; and according to each The first one-dimensional coordinate and each corresponding second-dimensional coordinate generate a two-dimensional coordinate.

Please refer to FIG. 4B, which may include step 460, determine at least a second mutual capacitance detection range according to the second-dimensional coordinates, and include step 470, for the second mutual capacitance. Mutual-capacitance detection is performed in the type detection range to determine a third-dimensional coordinate corresponding to each of the second-dimensional coordinate. The second-dimensional coordinate and the first The three-dimensional coordinate may constitute a two-dimensional coordinate, such as (a third-dimensional coordinate, a second-dimensional coordinate) or (a second-dimensional coordinate, a third-dimensional coordinate).

For example, when driving signals are provided to the first conductive strips at the same time, the signals of all the second conductive strips are detected to obtain first-dimensional sensing information based on the signals of all the second conductive strips. In addition, when it is determined according to the one-dimensional sensing information that an external conductive object coupled to the ground approaches or covers the touch panel, the method further includes: determining at least one first one-dimensional coordinate according to the first-dimensional sensing information; Each first-dimensional coordinate determines a first mutual-capacitance detection range, and mutual-capacitance detection is performed on the first mutual-capacitance detection range to generate a first-dimensional coordinate corresponding to each first-dimensional coordinate. A second one-dimensional sensing information; at least one second one-dimensional coordinate corresponding to each first one-dimensional coordinate is generated based on one second one-dimensional sensing information corresponding to each first one-dimensional coordinate; respectively based on Each second-dimensional coordinate determines a second mutual-capacitance detection range, and mutual-capacitance detection is performed on the second mutual-capacitance detection range to generate a corresponding second-dimensional coordinate. One third-dimensional sensing information; generating at least one first corresponding to each second-dimensional coordinate according to the third-dimensional sensing information corresponding to each second-dimensional coordinate A dimension coordinate; and generate a second dimension based on each of the corresponding coordinates and a third dimension coordinate of each dimension twelve coordinates.

In FIG. 4A, each first-dimensional coordinate paired with each corresponding second-dimensional coordinate represents the position of one of the external conductive objects. In addition, when the external conductive object is determined, the process proceeds to step 410. In FIG. 4B, each third-dimensional coordinate corresponding to each second-dimensional coordinate represents the position of one of the external conductive objects. In addition, when the external conductive object is determined, the process proceeds to step 410.

Please refer to FIG. 4C, which is a schematic flowchart of determining a position based on a result of full-screen drive detection and mutual capacitance detection according to a third embodiment of the present invention. As shown in step 410, full-screen driving detection is performed to generate two one-dimensional sensing information. Next, as shown in step 420, it is determined whether there is at least one external conductive object approaching or covering according to the one-dimensional sensing information. If there is no approach or coverage of at least one external conductive object, proceed to step 410; otherwise, as shown in step 480, determine all possible two-dimensional coordinates according to the one-dimensional sensing information, and according to the described The two-dimensional coordinates determine at least one mutual capacitance detection range, and as shown in step 490, the two-dimensional coordinates corresponding to the positive touch are determined according to the mutual capacitance detection range.

Obviously, with the above-mentioned full-screen drive detection, whether or not there are any water stains or other conductive objects that are not coupled to the external ground on the touch panel, it can be determined whether there are any external conductive objects that are coupled to the external ground approaching or covering . Furthermore, when it is determined that an external conductive object coupled to an external ground is approaching or covered, two-dimensional mutual capacitance detection can be used to determine whether an external conductive object coupled to an external ground is near or touched outside the range. Coupled with water stains or other conductive objects on the external ground. When determining the range of water stains or other conductive objects that are not coupled to the external ground, you can use any coordinates that are not detected in the range of water stains or other conductive objects that are not coupled to the external ground, or display clean Information or signals on the surface of the touch panel to prompt the exclusion of interference from water stains or other conductive objects that are not coupled to the external ground.

In another example of the present invention, two-dimensional mutual capacitance detection is performed first, and then full-screen drive detection is performed. Full-screen drive detection can determine the conductive strips that are approached or covered by external conductive objects that are coupled to the external ground, and can be compared with the two-dimensional sensing information generated by two-dimensional mutual capacitance detection, which can detect the external coupling of the external ground Non-coupling beyond conductive strips that are near or covered by conductive objects Water stains on the outside ground or other conductive objects.

With the operation of the system, the influence and interference of the external environment on the touch panel has been changing. In order to adapt to such changes, it can be overcome by periodically or irregularly updating the benchmark. Therefore, the update of the benchmark can be performed continuously, during the process of full-screen drive detection and / or mutual capacitance detection.

During the mutual capacitance detection, if there is a conductive substance attached to the touch panel, the corresponding negative touch or negative touch with a positive touch around it will appear in the two-dimensional sensing information. At this time, if the benchmark is updated, the benchmark will be Including the negative touch. Before the next benchmark update, as long as the external conductive object is not located in the negative contact area, the position of the external conductive object can be detected normally. However, if the conductive material is wiped off, the area that originally showed negative touch in the baseline will show positive touch on the two-dimensional sensing information, causing a judgment error.

Through the above-mentioned comparison of the one-dimensional sensing information generated by the full-screen driving detection, there is an inconsistent positive touch between the two-dimensional sensing information and the one-dimensional sensing information, which can reflect the existence of the above problems, so mutual capacitance is performed. Baseline detection of type detection solves the above problems. For example, one-dimensional projection of the two-dimensional sensing information to generate one-dimensional sensing information, or summing up the values corresponding to the overlaps on each of the second conductive bars separately can also generate one-dimensional sensing information. The one-dimensional sensing information derived from the two-dimensional sensing information can be used to compare with the one-dimensional sensing information generated by full-screen drive detection to determine whether there is a non-corresponding positive touch and to determine whether to perform mutual capacitance in advance Updated benchmarks for style detection.

In addition, only the two-dimensional full mutual-capacitance detection can also determine whether there is a possibility that a conductive substance adheres to the touch panel. For example, in the two-dimensional sensing information, only negative touches are displayed but not positive touches, or positive touches only appear around negative touches and there are no positive touches that exceed the threshold value. It is determined that the touch panel may have conductive substances attached to it. In an example of the present invention, it can be directly estimated that a conductive substance adheres to the touch panel. In another example of the present invention, in this case, a full-screen driving detection is additionally performed to confirm whether an external conductive object approaches or covers.

In an example of the present invention, the reference is updated when no external conductive object approaches or covers the touch panel. For example, the full-screen drive detection is used to determine whether an external conductive object is approaching or covering the touch panel. The baseline update is performed when no external conductive object is approaching or covering the touch panel. This can include full-screen drive detection or / Updated benchmarks with mutual capacitance detection. For another example, the two-dimensional sensing information generated by the two-dimensional full mutual capacitance detection is used to determine whether an external conductive object approaches or covers the touch panel, and the benchmark is updated when no external conductive object approaches or covers the touch panel. .

Please refer to FIG. 5A, which is a schematic flowchart of an update benchmark according to a fourth embodiment of the present invention. Compared to FIG. 2E, as shown in step 250, it is further determined whether or not there is no at least one external conductive object coupled to the ground close to or covering the touch panel according to the one-dimensional sensing information to determine whether it lasts for a preset time. If at least one external conductive object coupled to the ground has not approached or covered the touch panel for more than a preset time, as shown in step 210, full-screen driving detection is continued. On the contrary, if it is determined that at least one external conductive object coupled to the ground does not approach or cover the touch panel for a preset time based on the one-dimensional sensing information, a two-dimensional mutual capacitance is performed as shown in steps 260 and 270. Type detection to obtain a two-dimensionality sensing information to update a benchmark based on the two-dimensionality sensing information. The step of updating the reference in FIG. 5A may be performed by the aforementioned controller 160. In an example of the present invention, updating a reference based on two-dimensional sensing information is based on two-dimensional sensing information as a new reference or two-dimensional sensing information and the original The benchmark average serves as the new benchmark. In addition, the position of each external conductive object coupled to the ground is determined based on the amount of change between the two-dimensional sensing information and the reference mutual capacitive coupling signal.

For example, a detection device for a touch panel according to the present invention includes a touch panel. The touch panel includes a plurality of first conductive bars and a plurality of second conductive bars. A controller executes a full screen. Driving detection includes: simultaneously providing a driving signal to all the first conductive bars; when simultaneously providing a driving signal to all the first conductive bars, detecting the mutual capacitive coupling signals of all the second conductive bars to obtain a basis The signals of all the second conductive bars generate one-dimensional sensing information; and determine whether at least one external conductive object coupled to the ground approaches or covers the touch panel according to the one-dimensional sensing information; and the controller senses according to one-dimensional sensing When the information determines that there is no at least one external conductive object coupled to the ground approaching or covering the touch panel for a preset period of time, a two-dimensional mutual capacitance detection is performed to obtain a two-dimensional sensing information based on the two-dimensional sensing The measurement information updates a benchmark, wherein the two-dimensional mutual capacitance detection includes: alternately providing a driving signal to a different one of the first conductive bars. Multiple conductive strips; each time a different one or more conductive strips in the first conductive strip are provided with a driving signal, the signals of all the second conductive strips are detected to obtain the interaction based on all the second conductive strips; The capacitively coupled signal generates one-dimensional sensing information corresponding to the first conductive strip provided with the driving signal; and gathers one-dimensional sensing information corresponding to the first conductive strip provided with the driving signal to generate a two-dimensional sense Test information.

When it is determined according to the one-dimensional sensing information that at least one external conductive object coupled to the ground approaches or touches the touch panel, a two-dimensional mutual capacitance detection is performed to obtain a two-dimensional sensing information to The measurement information determines the position of each external conductive object coupled to the ground.

When the touch panel device is held, it is possible that the hand holding the handheld device is approaching or covering the touch panel when the device is turned on. If the baseline is updated at this time, the initial baseline obtained will include positive touch sensing information, causing the location of the positive touch sensing information in the baseline to fail to reflect the approach or coverage of external conductive objects, even if the positive positive touch sensing information is subsequently caused If you remove the touch panel with your finger or palm, the part may still not be able to reflect the approach or coverage of the external conductive object, for example, the position of the external conductive object approaching or covering the part cannot be normally determined.

Please refer to FIG. 5B, which is a schematic flowchart of an update benchmark according to a fifth embodiment of the present invention. The present invention proposes to store an original datum in advance. The original datum can be stored in a non-volatile storage unit, so it will not disappear even if the power is turned off. First, as shown in steps 510 and 520, the obtained reference IS will be compared with the original reference DS. If there is a match, a normal operation (operation) is performed as shown in step 530; otherwise, the original is compared as shown in step 540. Whether the benchmark matches the acquired sensing information (one-dimensional sensing information or two-dimensional sensing information). If they do not match, perform normal operations (operations) as shown in step 560; otherwise, update as shown in step 550. Benchmark.

Under normal circumstances, the benchmark is updated when no external conductive object approaches or covers the touch panel or no conductive substance is attached to the touch panel, so the normal benchmarks obtained (including the original benchmark DS) should not show positive touch. Or negative touch. Assume that the original reference DS is normal, and external conductive objects are approaching or covered when the reference IS is updated. Then, when the sensing information RS is obtained, the comparison between the original reference DS and the reference IS will not be performed at this time. Therefore, the sensing information RS and the reference DS are compared again. If the two match, it means that there is no external conductive object approaching or covering the touch panel or no conductive substance is attached to the touch panel, and the reference IS can be updated immediately. If the two do not match, the baseline IS cannot be updated and normal operations can only continue. For example, keep your hand pressed on the touch surface Board, not only the benchmark presents a positive touch, but the subsequent sensing information RS also presents a positive touch, both of which are the same, so even if a hand is pressed on the touch panel, it will not be judged that an external conductive object is approaching or touching, and then ignored There is a part of the hand that is pressed when the computer is turned on, but other parts of the touch panel can still work normally. Once the hand is continuously pressed to remove the touch panel when it is turned on, if the other parts are not approached or covered by external conductive objects, in step 540, it is determined that the sensing information RS matches the original reference DS, and the benchmark can be performed. Update. If in step 540, the other parts still have the approach or coverage of the external conductive object, continue to operate normally until the reference IS is updated when there is no approach or coverage of the external conductive object. In addition, if the original reference DS is abnormal, the sensing information RS will not match the original reference DS, and the normal operation may still be continued as shown in step 560.

The above benchmarks can be applied to self-capacitance detection, mutual capacitance detection, or full-screen drive detection.

In addition, the baseline update can be all baseline updates or partial baseline updates. As mentioned earlier, self-capacitance detection and full-screen drive detection generate one-dimensional sensing information. When this is used as a benchmark, the baseline update is all updates. In mutual capacitance detection, the two-dimensional sensing information is composed of one-dimensional sensing information corresponding to each first conductive strip (the first conductive strip provided with a driving signal), so the update of the benchmark can be only The corresponding partial reference update is performed for a single first conductive strip, that is, only one of the plurality of one-dimensional sensing information in the reference is updated.

The touch panel of the present invention can also be used for transmitting and receiving information, that is, the touch panel can be used for capacitive communication, and the above-mentioned controller provides driving signals to one or more of the touch panels. Or all of the first conductive strips can provide signal transmission, and one or more or all of the second conductive strips can be detected by the controller. It is used to receive signals, so that the two touch panels can perform unidirectional or bidirectional communication.

In an example of the present invention, the touch panel can communicate face to face, that is, the touch panel performs capacitive communication face to face through an insulating surface layer. For example, the touch panels of two handheld devices are stacked face to face for capacitive communication. In another example of the present invention, the touch panel may perform capacitive communication through a human body. For example, a user touches the touch panel of a handheld device with one hand and touches the touch panel of another handheld device with the other hand, and uses the human body as a conductive medium for capacitive communication. As another example, when the first user and the second user touch the touch panel of the first handheld device and the touch panel of the second handheld device, respectively, when the first-hand user contacts the second user's body, the user can make The first handheld device and the touch panel of the second handheld device perform capacitive communication. A person with ordinary knowledge in the art can infer that capacitive communication is not limited to one-to-one communication, but also can perform many-to-many communication, and is not present in the human body as a conductive medium, or other conductive media . For example, the two touch panels can be placed in the pockets of two different people, and when the two people shake hands or touch, the two touch panels can communicate.

Accordingly, the present invention provides a touch panel communication method, which uses a first touch panel to communicate with a second touch panel. The first touch panel and the second touch panel have a detection mode, which respectively detects the approach or touch of an external conductive object. In addition, the first touch panel and the second touch panel have a communication mode to exchange or transmit information through capacitive coupling communication between the first touch panel and the second touch panel. Therefore, a first touch panel and a second touch panel constitute a communication system. In an example of the present invention, the detection mode and the communication mode may be performed alternately. In another example of the present invention, a user interface may be used to switch between the detection mode and the communication mode.

Please refer to FIG. 6, which is a schematic flowchart of a communication method for a touch panel according to a sixth embodiment of the present invention. As shown in step 610, a first touch panel and a second touch panel are provided. Next, as shown in steps 620 and 630, the approach or touch of an external conductive object is detected in a detection mode of the first touch panel and the second touch panel, respectively, and between the first touch panel and the second touch panel. A communication mode of the control panel communicates via capacitive coupling between the first touch panel and the second touch panel to exchange or transmit information.

For example, the first touch panel has a transparent insulating layer and a conductive layer, and information is transmitted through the conductive layer capacitively coupled to the second touch panel via the transparent insulating layer. In contrast, the second touch panel has a transparent insulating layer and a conductive layer, and the information is received through the conductive layer capacitively coupled to the first touch panel via the transparent insulating layer. The capacitive coupling between the first touch panel and the second touch panel may be that the first touch panel is capacitively coupled to the second touch panel through capacitive coupling with at least one external conductive object. For example, the first touch panel and the second touch panel respectively have a plurality of first conductive bars that are provided with a driving signal in a detection mode and a plurality of second conductive bars that are provided with a capacitive coupling signal by a driving signal. The first touch panel and the second touch panel communicate with each other by the first conductive strip and / or the second conductive strip approached or touched by an external conductive object. The signal transmission can be transmitted in analog or digital mode. In a preferred example of the present invention, the signal is transmitted in digital encoding. For example, it can be a binary string or packet. The number of bits in a single transmission can be Fixed can also be variable. For example, it can be a fixed-length balanced code, a Berger Code, or a packet with a packet header. For example, capacitive communication can use the handshaking mechanism as a touch on the transmitting end. The panel sends a transmission request with an encoded signal or packet. The touch panel at the receiving end responds to the transmission confirmation with a signal or packet after receiving and confirming the transmission request. Those skilled in the art can infer other serial communication protocols.

When two touch panels come close to or come into contact with each other, a touch panel can provide a driving signal to the conductive strip and detect the signal of the conductive strip to confirm the existence of another touch panel, and then perform capacitive communication. In an example of the present invention, a driving signal may be provided by a first touch panel. If a second touch panel is in contact with the first touch panel or is within a preset distance, the first touch panel is conductive. The signal of the bar is relatively smaller than the signal of the conductive bar of the first touch panel when the second touch panel is not in contact or within a preset distance, so that it can be confirmed whether capacitive communication can be performed. At the same time, the conductive strips of the second touch panel are also capacitively coupled by the driving signals of the first touch panel. By detecting the conductive strips of the second touch panel, it can also be informed that capacitive communication can be performed.

In an example of the present invention, the controller performing capacitive communication has the capability of identifying the conductive strips that receive signals. For example, when a first touch panel or a first group of transmitting conductive strips of a first touch panel is provided with a driving signal, a first bar or a first group of receiving conductive strips of a second touch panel is capacitively coupled, and the second When the controller of the touch panel detects the signals of the conductive bars, it can determine the conductive bars that are capacitively coupled. In this case, the second touch panel may select one or more conductive strips as a second or a second group of conductive strips in addition to the first or first group of receiving conductive strips, and provide driving. signal. Similarly, the first touch panel can detect a second bar or a second group of conductive bars that are capacitively coupled to the driving signal transmitted by the second touch panel. In other words, the capacitive communication of the touch panel provided by the present invention may be simplex or full duplex. Since the touch panels are not necessarily aligned flat when placed face to face, and the size or number of conductive bars of the first touch panel and the second touch panel are not necessarily the same, the capacitive communication of the touch panel provided by the present invention Suitable for touch panels that are misaligned or have different sizes or different numbers of conductive bars.

The touch panel communication of the present invention includes, but is not limited to, simplex, half-duplex, and full-duplex. The capacitive coupling between the first touch panel and the second touch panel is a direct capacitive coupling of the first touch panel and the second touch panel facing each other, where the first touch panel and the second touch panel face each other. It includes a first area and a second area. The first touch panel and the second touch panel perform half-duplex or full-duplex transmission through capacitive coupling in the first region and the second region. In an example of the present invention, the first touch panel and the second touch panel each have a plurality of conductive bars, and the conductive bars of the first touch panel in the first area and the conductive areas of the second touch panel in the second area. The bars do not overlap.

One or more transmitting conductive bars and one or more receiving conductive bars corresponding to the first touch panel and the second touch panel may be referred to as a group of communication conductive bars. In other words, the capacitive communication of the touch panel provided by the present invention can separate multiple groups of communication conductive strips, and can simultaneously provide multiple groups of communication for multi-bit parallel communication or multi-group serial communication. In an example of the present invention, two groups of communication conductive strips can perform dual-rail communication. The first group of communication conductive strips and the second group of communication conductive strips only have a group of communication conductive strips transmitting signals at the same time. One group of communication conductive strips represents 1 when transmitting a signal, and the second group of communication conductive strips represents 0 when transmitting a signal, thereby confirming whether the signal is transmitted correctly.

In addition, the first touch panel may first detect a part of the hand approaching or covering the touch panel, and provide driving signals to be transmitted by one or more conductive bars covered by a conductive medium, which can save a lot of power compared to full-screen driving . Similarly, the second touch panel may also first detect a portion where the conductive medium approaches or covers the touch panel, and one or more conductive bars covered by the conductive medium receive signals.

A person with ordinary knowledge in the art can infer that the touch surface provided by the present invention The capacitive communication of the board can be used to transmit sound data, image data, text data, commands, or other information. It is especially suitable for mobile phones, tablets, touch pads or other devices with touch panels, and is not limited to handheld devices. In addition, the aforementioned touch panel is not limited to a projected capacitive touch panel, and may also be a surface capacitive touch screen, a resistive touch screen, or the like. For example, the aforementioned first touch panel for communication is a surface capacitive touch panel, and the second touch panel is a projected capacitive touch panel.

Please refer to FIG. 7, which is a schematic diagram of communication using a touch panel according to a seventh embodiment of the present invention, which is an optimal mode. When the capacitive touch panel is provided with a driving signal, the ground potential of the first touch panel 71 is provided to at least one conductive strip 73 of the first touch panel 71, and the ground potential of the second touch panel 72 is provided to At least one conductive strip 74 of the second touch panel 72 makes the first touch panel 71 and the second touch panel 72 to be electrically coupled with a conductive strip provided with a ground potential, thereby reducing the first touch panel and the second touch panel. Control panel indirect ground potential difference.

For example, the conductive strips of the first touch panel arranged in the first direction are provided with a driving signal, and the conductive strips of the second touch panel are provided with a ground potential, and the conductive strips of the second touch panel aligned in the first direction are provided. A conductive strip that is grounded and aligned in the second direction is used to detect the transmitted data. For another example, a plurality of consecutively arranged conductive strips of the first touch panel are provided with a driving signal, all other conductive strips are provided with a ground potential, and the conductive strips of the second touch panel without a detection signal are provided. Ground potential.

In a preferred mode of the present invention, the first touch panel has the aforementioned shielding conductive strip, and the shielding conductive strip is provided with a ground potential.

In an example of the present invention, in the foregoing step 630, during communication, at least a portion of the first touch panel and the second touch panel are respectively provided with a ground potential, and the first touch panel and the first touch panel The two touch panels are capacitively coupled face-to-face with at least a portion of the ground potential provided to approach the ground potential between the first touch panel and the second touch panel. The capacitive coupling between the first touch panel and the second touch panel is a direct capacitive coupling between the first touch panel and the second touch panel, where the first touch panel and the second touch panel face each other. The area includes a first area and a second area. The first touch panel and the second touch panel perform half-duplex or full-duplex transmission through capacitive coupling in the first area and the second area.

In a first example of the present invention, the first touch panel and the second touch panel respectively have a plurality of first conductive bars that are provided with a driving signal in a detection mode and a plurality of first conductive bars that provide a capacitive coupling signal due to the driving signals. Two conductive strips. The first conductive strip communicates with the first and second areas, and the second conductive strip described in the detection mode is provided with a ground potential.

In a second example of the present invention, the first touch panel and the second touch panel respectively have a plurality of first conductive bars that are provided with a driving signal in a detection mode and a plurality of first conductive bars that provide a capacitive coupling signal due to the driving signals. Two conductive strips. The first conductive strip and the second area communicate with each other through a second conductive strip, and the first conductive strip described in the detection mode is provided with a ground potential.

In a third example of the present invention, the first touch panel and the second touch panel respectively have a plurality of first conductive strips that are provided with a driving signal in a detection mode and a plurality of first conductive strips that provide a capacitive coupling signal due to the driving signal. There are two conductive strips, and the area where the first touch panel and the second touch panel face each other further includes a third area. The second conductive strip communicates in the first area and the second area, and in the detection mode, The third conductive strip is provided with a ground potential.

In a fourth example of the present invention, the first touch panel and the second touch panel are respectively A plurality of first conductive strips provided with a driving signal in a detection mode and a plurality of second conductive strips provided with a capacitive coupling signal due to the driving signal, wherein in the communication mode, the first conductive strips and the second conductive strips One of the conductive bars is simultaneously provided with a driving signal, and the other of the first conductive bar and the other of the second conductive bars are simultaneously provided with a ground signal.

According to the above method, in order to obtain the movement trajectory of an external object, a first full-screen mutual capacitance detection must be performed at a first time point to obtain a first unitary dimension sensing information, thereby judging that the external object is in the first At a point in time, a first-dimensional coordinate of a touch panel is touched. Then, a second full-screen mutual capacitance detection is performed at a second time point to obtain a second unitary dimension sensing information, thereby determining that the external object touches a second of the touch panel at the second time point.贰 Dimensional coordinates. Then, the foregoing steps are repeated to obtain the movement track of the external object.

For example, the touch panel includes M driving electrodes and N sensing electrodes. At the first time point, while driving a first driving electrode, N sensing electrodes are sequentially detected to obtain the N driving electrodes corresponding to the N driving electrodes. Electrical signal of the sensing point. Accordingly, in order to obtain electrical signals corresponding to N sensing points of the N sensing electrodes of each driving electrode, M driving electrodes must be driven, and each driving electrode must detect N sensing electrodes. electrode. Therefore, performing a full-screen mutual capacitance detection requires driving a total of M times and detecting M x N times, which is quite time-consuming and power-consuming.

Therefore, the present invention proposes a touch method, which is applied to the touch panel described above. The touch method includes the following steps. As shown in FIG. 8, in step 802, in a first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N first electrical signals. In step 804, at least one first driving electrode and at least one first sensing electrode touched or approached by the first external object are detected according to the MxN first electrical signals. In steps In 808, in a second period, a first mutual capacitance detection is performed on the X driving electrodes and the Y sensing electrodes to obtain X x Y second electrical signals. The M driving electrodes include the X driving electrodes, where X is less than M. The N driving electrodes include the Y driving electrodes, where Y is less than or equal to N.

After step 804, a first touch position of the first external object in the first period may be determined according to the M x N first electrical signals, as shown in step 810. After step 808, a second touch position of the first external object in the second period can be determined according to the X x Y second electrical signals, as shown in step 812.

Furthermore, after step 808, steps 804 and 808 can be repeatedly performed to detect the movement track of the first external object.

In addition, multiple external objects can be detected simultaneously during the first period, and multiple external objects can also be detected simultaneously during the second period. For example, in step 814, at least one second driving electrode and at least one second sensing electrode touched or approached by a second external object are detected according to the M x N first electrical signals. In step 818, during a second period, a second mutual capacitance detection is performed on the J driving electrodes and the K sensing electrodes to obtain J x K second electrical signals. The M driving electrodes include the J driving electrodes, where J is less than M. The N driving electrodes include the K driving electrodes, where K is less than or equal to N.

After step 814, a third touch position of the second external object in the first period can be determined according to the M x N first electrical signals, as shown in step 820. After step 818, a fourth touch position of the second external object in the second period may be determined according to the J x K second electrical signals, as shown in step 822.

Furthermore, after step 818, steps 814 and steps can be performed repeatedly. 818 to detect the movement track of the second external object.

Please refer to FIG. 9A, a touch panel includes M driving electrodes and N sensing electrodes. In a first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N first electrical signals. According to the M x N first electrical signals, the third and fourth driving electrodes and the third and fourth sensing electrodes that the first external object EO1 touches or approaches are detected. In a second period, the third and fourth driving electrodes and the third and fourth sensing electrodes are selected to perform a first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes. The X strips of the driving electrodes include the third and fourth driving electrodes, and the Y strips of the sensing electrodes include the third and fourth sensing electrodes.

Therefore, as shown in FIG. 9B, in the second period, the first mutual capacitance detection system is performed on five driving electrodes and five sensing electrodes, wherein the five driving electrodes include the second driving electrode to the sixth driving electrode. The driving electrodes, the five sensing electrodes include a second sensing electrode to a sixth sensing electrode. In this way, the movement track of the first external object can be detected without completely detecting the full screen.

In another embodiment, as shown in FIG. 10A, according to the M x N first electrical signals in the first period, the third and fourth items touched or approached by the first external object EO1 are detected at the same time. The driving electrodes and the third and fourth sensing electrodes, and the sixth and seventh driving electrodes and the fourth and fifth sensing electrodes touched or approached by a second external object EO2.

As shown in FIG. 10B, in the second period, the third and fourth driving electrodes and the third and fourth sensing electrodes are selected to perform the first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes. Electrodes, and the sixth and seventh driving electrodes and the fourth and fifth sensing electrodes are selected to perform a second mutual capacitance detection on the J driving electrodes and the K sensing electrodes.

For example, in the second period, the first mutual capacitance detection is performed on five drives. The electrodes and five sensing electrodes, wherein the five driving electrodes include the second driving electrode to the sixth driving electrode, and the five sensing electrodes include the second sensing electrode to the sixth sensing electrode. In the same second period, the second mutual capacitance detection is performed on five driving electrodes and five sensing electrodes, wherein the five driving electrodes include the fourth driving electrode to the eight driving electrode, and the five driving electrodes The sensing electrode includes a third sensing electrode to a seventh sensing electrode.

The above X and J may be any integer greater than 1, but less than M. The above Y and K may be any integer greater than 1, but less than or equal to N.

Furthermore, in the above-mentioned full-screen mutual capacitance detection, when a driving electrode is driven, the N first electrical signals are obtained in D sub-periods. In each sub-period, the first electrical signals of N / D sensing points are continuously detected, where Y is less than or equal to N / D. For example, the touch panel includes 60 sensing electrodes, and a multiplexer can be electrically coupled to 20 sensing electrodes. In each sub-period, the multiplexer is electrically coupled to 20 sensing electrodes for mutual capacitance detection. Therefore, only 20 first electrical signals can be detected in each sub-period, so a complete mutual capacitance detection corresponding to a driving electrode needs to be performed in 3 sub-periods.

According to the above, the present invention proposes a touch processor electrically coupled to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes, wherein the touch processor performs the following steps: judging at least one first A first driving electrode and at least one first sensing electrode touched or approached by an external object; and performing a first mutual capacitance detection on X driving electrodes and Y sensing electrodes, wherein the X driving The electrodes include the at least one first driving electrode, and the Y sensing electrodes include the at least one first sensing electrode, where X is less than M and Y is less than or equal to N.

In one embodiment of the present invention, the touch processor determines the at least one first driving electrode and the at least one first sensing electrode in a first period, and in a second period, the touch The control processor performs the first mutual capacitance detection, wherein the second period is shorter than the first period.

In another embodiment of the present invention, the touch processor performs a full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain M x N first electrical properties. signal. Subsequently, according to the M x N first electrical signals, the touch processor detects the at least one first driving electrode and the at least one first sensing electrode, thereby determining whether the first external object is in the first A first touch position of the time period.

The above-mentioned full-screen mutual capacitance detection includes the following steps: sequentially driving each driving electrode; detecting the first electrical signals of the driving electrodes corresponding to the N sensing points of the N sensing electrodes by using mutual capacitance detection Where the N first electrical signals are obtained in D sub-periods, and in each sub-period, the first electrical signals of N / D sensing points are continuously detected, where Y is less than or equal to N / D And obtaining the M x N first electrical signals according to the N first electrical signals of each driving electrode.

In another embodiment of the present invention, the touch processor obtains X x Y second electrical signals according to the first mutual capacitance detection, so as to determine a second external object in the second period of time. Touch the position.

In another embodiment of the present invention, the touch processor determines at least one second driving electrode and at least one second sensing electrode touched or approached by a second external object during the first period. Subsequently, the touch processor performs a second mutual capacitance detection on the J driving electrodes and the K sensing electrodes during the second period, wherein the J driving electrodes include the at least one second driving electrode and the K sensing electrodes The measuring electrode includes the at least one second sensing electrode, where J is less than M and K is less than or equal to N.

In another embodiment of the present invention, the touch processor performs a full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain M x N An electrical signal. Subsequently, the touch processor detects the at least one second driving electrode and the at least one second sensing electrode according to the M x N first electrical signals, thereby determining whether the second external object is at the first A third touch position of the time period.

In another embodiment of the present invention, the touch processor obtains J x K second electrical signals according to the second mutual capacitance detection, so as to determine a fourth of the second external object in the second period. Touch the position.

According to the above, the present invention proposes a touch method applied to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes. The touch method includes the following steps: determining at least one first driving electrode and at least one first sensing electrode that a first external object touches or approaching; and performing a first mutual capacitance detection on the X driving electrodes and Y sensing electrodes, wherein the X driving electrodes include the at least one first driving electrode, the Y sensing electrodes include the at least one first sensing electrode, X is less than M, and Y is less than or equal to N.

In a first period, determine the at least one first driving electrode and the at least one first sensing electrode, and perform the first mutual capacitance detection in a second period, wherein the second period is longer than the first period. short.

In another embodiment of the present invention, during the first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N first electrical signals; and According to the M x N first electrical signals, the at least one first driving electrode and the at least one first sensing electrode that are touched or approached by the first external object are detected, thereby determining the first external object A first touch position during the first period.

The above-mentioned full-screen mutual capacitance detection includes the following steps: sequentially driving each driving electrode; and using mutual capacitance detection, the driving electrode corresponding to N of the N sensing electrodes is driven. The first electrical signals of the sensing points, wherein the N first electrical signals are obtained in D sub-periods, and the first electrical signals of N / D sensing points are continuously detected in each sub-period Wherein Y is less than or equal to N / D; and the M x N first electrical signals are obtained according to N first electrical signals of each driving electrode.

The above touch method further includes: obtaining X x Y second electrical signals according to the first mutual capacitance detection to determine a second touch position of the first external object in the second period.

The above touch method further includes: determining, during the first period, at least one second driving electrode and at least one second sensing electrode that a second external object touches or approaches; and during the second period, executing a The second mutual capacitance is detected at J driving electrodes and K sensing electrodes, wherein J driving electrodes include the at least one second driving electrode, K sensing electrodes include the at least one second sensing electrode, J Less than M, K is less than or equal to N.

In another embodiment of the present invention, in the first period, the full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain the M x N first electrical signals. Then, the at least one second driving electrode and the at least one second sensing electrode are detected according to the M x N first electrical signals, so as to determine a third of the second external object in the first period. Touch the position.

The touch method described above further includes: obtaining J x K second electrical signals according to the second mutual capacitance detection to determine a fourth touch position of the second external object in the second period.

Furthermore, the present invention proposes a touch method, which is applied to the touch panel described above. The touch method includes the following steps. As shown in FIG. 8, in step 802, in a first period, execution A full-screen mutual capacitance is detected at the M driving electrodes and the N sensing electrodes to obtain M x N first electrical signals. In step 804, at least one first driving electrode and at least one first sensing electrode touched or approached by the first external object are detected according to the MxN first electrical signals. In step 806, a first driving electrode of the at least one first driving electrode is selected, and a first sensing electrode of the at least one first sensing electrode is selected. In step 808, in a second period, a first mutual capacitance detection is performed on the X driving electrodes and the Y sensing electrodes to obtain X x Y second electrical signals. The M driving electrodes include the X driving electrodes, and the X driving electrodes include the first driving electrode selected, where X is less than M. The N driving electrodes include the Y driving electrodes, and the Y sensing electrodes include the selected first sensing electrodes, where Y is less than N.

After step 804, a first touch position of the first external object in the first period may be determined according to the M x N first electrical signals, as shown in step 810. After step 808, a second touch position of the first external object in the second period can be determined according to the X x Y second electrical signals, as shown in step 812.

Furthermore, after step 808, steps 806 to 808 can be repeatedly performed to detect the movement track of the first external object.

In addition, multiple external objects can be detected simultaneously during the first period, and multiple external objects can also be detected simultaneously during the second period. For example, in step 814, at least one second driving electrode and at least one second sensing electrode touched or approached by a second external object are detected according to the M x N first electrical signals. In step 816, a second driving electrode of the at least one second driving electrode is selected, and a second sensing electrode of the at least one second sensing electrode is selected. In step 818, in a second period, a second mutual capacitance detection is performed on the J driving electrodes and K sensing electrodes to obtain J x K second electrical signals. The M driving electrodes include the J driving electrodes, and the J driving electrodes include the selected second driving electrode, where J is less than M. The N driving electrodes include the K driving electrodes, and the K sensing electrodes include the selected second sensing electrodes, where K is less than N.

After step 814, a third touch position of the second external object in the first period can be determined according to the M x N first electrical signals, as shown in step 820. After step 818, a fourth touch position of the second external object in the second period may be determined according to the J x K second electrical signals, as shown in step 822.

Furthermore, after step 818, steps 816 to 818 can be repeatedly performed to detect the movement track of the second external object.

Please refer to FIG. 9A, a touch panel includes M driving electrodes and N sensing electrodes. In a first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N first electrical signals. According to the M x N first electrical signals, the third and fourth driving electrodes and the third and fourth sensing electrodes that the first external object EO1 touches or approaches are detected. In a second period, the fourth driving electrode and the fourth sensing electrode are selected to perform a first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes. The X bars of the driving electrodes include a 4th drive electrode, and the Y bars of the sensing electrodes include a 4th sensing electrode.

Therefore, as shown in FIG. 9B, in the second period, the first mutual capacitance detection system is performed on five driving electrodes and five sensing electrodes, wherein the five driving electrodes include the second driving electrode to the sixth driving electrode. The driving electrodes, the five sensing electrodes include a second sensing electrode to a sixth sensing electrode. In this way, the movement track of the first external object can be detected without completely detecting the full screen.

In another embodiment, as shown in FIG. 10A, according to the M x N first electrical signals in the first period, the third and fourth items touched or approached by the first external object EO1 are detected at the same time. The driving electrodes and the third and fourth sensing electrodes, and the sixth and seventh driving electrodes and the fourth and fifth sensing electrodes touched or approached by a second external object EO2.

As shown in FIG. 10B, in the second period, the fourth driving electrode and the fourth sensing electrode are selected to perform the first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes, and select The sixth driving electrodes and the fifth sensing electrodes perform a second mutual capacitance detection on the J driving electrodes and the K sensing electrodes.

For example, in the second period, the first mutual capacitance detection is performed on 5 driving electrodes and 5 sensing electrodes, wherein the 5 driving electrodes include the second driving electrode to the sixth driving electrode, and the 5 The strip sensing electrodes include the second sensing electrode to the sixth sensing electrode. In the same second period, the second mutual capacitance detection is performed on five driving electrodes and five sensing electrodes, wherein the five driving electrodes include the fourth driving electrode to the eight driving electrode, and the five driving electrodes The sensing electrode includes a third sensing electrode to a seventh sensing electrode.

The above X and J may be any integer greater than 1, but less than M. The above-mentioned Y and K may be any integer greater than 1, but less than N.

However, the first mutual capacitance detection is performed on the second driving electrode to the sixth driving electrode, and the second sensing electrode to the sixth sensing electrode. Therefore, in the second period, it is only necessary to sequentially drive the second driving electrode to the eighth driving electrode, and detect the second sensing electrode to the seventh sensing electrode with mutual capacitance to obtain the first Movement trajectories of the external object EO1 and the second external object EO2.

Furthermore, in the above-mentioned full-screen mutual capacitance detection, when a driving electrode is driven, In the D sub-periods, the N first electrical signals are obtained. In each sub-period, the first electrical signals of N / D sensing points are continuously detected, where Y is less than or equal to N / D. For example, the touch panel includes 60 sensing electrodes, and a multiplexer can be electrically coupled to 20 sensing electrodes. In each sub-period, the multiplexer is electrically coupled to 20 sensing electrodes for mutual capacitance detection. Therefore, only 20 first electrical signals can be detected in each sub-period, so a complete mutual capacitance detection corresponding to a driving electrode needs to be performed in 3 sub-periods.

According to the above, the present invention proposes a touch processor, which is electrically coupled to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes. The touch processor performs the following steps: A first driving electrode and a first sensing electrode touched by an external object; and performing a first mutual capacitance detection on X of the driving electrodes and Y of the sensing electrodes, wherein the X driving electrodes include the first A driving electrode. The Y sensing electrodes include the first sensing electrode. X is less than M and Y is less than N.

In one embodiment of the present invention, the touch processor determines the first driving electrode and the first sensing electrode in a first period, and the touch processor executes the first interaction in a second period. Capacitance detection, wherein the second period is shorter than the first period.

In another embodiment of the present invention, the touch processor performs a full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain M x N first electrical properties. signal. Subsequently, according to the M x N first electrical signals, the touch processor detects at least one first driving electrode and at least one first sensing electrode touched or approached by the first external object, thereby determining the A first touch position of the first external object in the first period, wherein the at least one first driving electrode includes the first driving electrode, and the at least one first sensing electrode includes the first sensing electrode.

The above-mentioned full-screen mutual capacitance detection includes the following steps: sequentially driving each driving electrode; detecting the first electrical signals of the driving electrodes corresponding to the N sensing points of the N sensing electrodes by using mutual capacitance detection Where the N first electrical signals are obtained in D sub-periods, and in each sub-period, the first electrical signals of N / D sensing points are continuously detected, where Y is less than or equal to N / D And obtaining the M x N first electrical signals according to the N first electrical signals of each driving electrode.

In another embodiment of the present invention, the touch processor obtains X x Y second electrical signals according to the first mutual capacitance detection, so as to determine a second external object in the second period of time. Touch the position.

In another embodiment of the present invention, the touch processor determines a second driving electrode and a second sensing electrode touched by a second external object during the first period. Subsequently, the touch processor performs a second mutual capacitance detection on the J driving electrodes and the K sensing electrodes during the second period, wherein the J driving electrodes include the second driving electrodes and the K sensing electrodes Including the second sensing electrode, J is less than M and K is less than N.

In another embodiment of the present invention, the touch processor performs a full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain M x N first electrical properties. signal. Subsequently, the touch processor detects at least a second driving electrode and at least a second sensing electrode that the second external object touches or approaches based on the M x N first electrical signals, thereby determining the A third touch position of the second external object in the first period, wherein the at least one second driving electrode includes the second driving electrode, and the at least one second sensing electrode includes the second sensing electrode.

In another embodiment of the present invention, the touch processor detects the Obtain J x K second electrical signals to determine a fourth touch position of the second external object in the second period.

According to the above, the present invention proposes a touch method applied to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes. The touch method includes the following steps: determining a first driving electrode and a first sensing electrode touched by a first external object; and performing a first mutual capacitance detection on the X driving electrodes and the Y sensing electrodes. The measuring electrodes, wherein the X driving electrodes include the first driving electrode, and the Y sensing electrodes include the first sensing electrode, X is less than M and Y is less than N.

In a first period, the first driving electrode and the first sensing electrode are determined, and in a second period, the first mutual capacitance detection is performed, wherein the second period is shorter than the first period.

The touch method described above further includes: performing a full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain M x N first electrical signals; and The M x N first electrical signals detect the at least one first driving electrode and the at least one first sensing electrode touched or approached by the first external object to determine whether the first external object is in A first touch position in the first period, wherein the at least one first driving electrode includes the first driving electrode, and the at least one first sensing electrode includes the first sensing electrode.

The above-mentioned full-screen mutual capacitance detection includes the following steps: sequentially driving each driving electrode; detecting the first electrical property of the driving electrode corresponding to the N sensing points of the N sensing electrodes by mutual capacitance detection Signals, where the N first electrical signals are obtained in D sub-periods, and in each sub-period, the first electrical signals of N / D sensing points are continuously detected, where Y is less than or equal to N / D; and obtaining the M x N according to the N first electrical signals of each driving electrode First electrical signals.

The above touch method further includes: obtaining X x Y second electrical signals according to the first mutual capacitance detection to determine a second touch position of the first external object in the second period.

The above touch method further includes: during the first period, determining a second driving electrode and a second sensing electrode touched by a second external object; and performing a second mutual capacitance during the second period. Detected on J driving electrodes and K sensing electrodes, where J driving electrodes include the second driving electrode, and K sensing electrodes include the second sensing electrode, J is less than M and K is less than N.

The above touch method further includes: performing the full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain the M x N first electrical signals; and According to the M x N first electrical signals, at least one second driving electrode and at least one second sensing electrode that are touched or approached by the second external object are detected, thereby determining whether the second external object is in the A third touch position in the first period, wherein the at least one second driving electrode includes the second driving electrode, and the at least one second sensing electrode includes the second sensing electrode.

The touch method described above further includes: obtaining J x K second electrical signals according to the second mutual capacitance detection to determine a fourth touch position of the second external object in the second period.

Furthermore, the present invention further provides a touch processor, which is electrically coupled to a touch panel. The touch panel includes a plurality of first conductive bars and a plurality of second conductive bars. The touch processor performs the following steps: : Sequentially provide driving signals to all the first conductive strips; when each first conductive strip is provided with a driving signal, detect the signals of all the second conductive strips to obtain a signal corresponding to the first One-first-dimensional sensing information of the conductive strips; first-dimensional sensing information is generated based on all the first-dimensional sensing information; and whether at least one external object approaches or covers is determined based on the first-dimensional sensing information. The touch panel.

When it is determined that at least one external object approaches or covers the touch panel according to the first unitary dimension sensing information, the touch processor further performs the following steps: the at least one unit is determined according to the first unitary dimension sensing information. An external object approaches or covers at least one first-dimensional coordinate and at least one second-dimensional coordinate of the touch panel; at least one mutual capacitance is determined according to the at least one first-dimensional coordinate and the at least one second-dimensional coordinate, respectively. Mutual detection range, and performing mutual capacitance detection on the at least one mutual capacitance detection range to generate second second dimension sensing information corresponding to the at least one mutual capacitance detection range; and according to the first The two-dimensional dimension sensing information determines at least one third-dimensional coordinate and at least one fourth-dimensional coordinate.

In one embodiment of the present invention, the at least one external object includes a first external object, and the touch processor further performs the following steps: judging that the first external object corresponds to the first external object according to the first unitary dimension sensing information. The first one-dimensional coordinate and the second one-dimensional coordinate determine a first mutual capacitance detection range; and perform mutual capacitance detection on the first mutual capacitance detection range to generate a value corresponding to the first The second-dimensional sensing information of the mutual capacitance detection range; and the third-dimensional coordinate and the fourth-dimensional coordinate corresponding to the first external object are determined according to the second-dimensional sensing information.

The at least one external object further includes a second external object, and the touch processor further performs the following steps: judging the first one-dimensional coordinate and The second one-dimensional seat to determine a second mutual capacitance detection range; at the same time, the second mutual capacitance detection range and the second mutual capacitance detection range are performed Mutual capacitance detection to generate the second-dimensional sensing information corresponding to the first mutual-capacitance detection range and the second mutual-capacitance detection range; and judging based on the second-dimensional sensing information The third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the first external object and the third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the second external object are output.

Accordingly, the present invention further proposes a touch method applied to a touch panel. The touch panel includes a plurality of first conductive bars and a plurality of second conductive bars. The touch method includes the following steps: Driving signals on all the first conductive strips; when each first conductive strip is provided with a driving signal, detecting the signals of all the second conductive strips to obtain the first one-dimensional sensing information corresponding to the first conductive strips; Generate first-dimensional sensing information based on all first-dimensional sensing information; determine whether at least one external object approaches or covers the touch panel according to the first-dimensional sensing information.

When it is determined that at least one external object approaches or covers the touch panel according to the first unitary dimension sensing information, the touch method further includes the following steps: the at least one external unit is determined according to the first unitary dimension sensing information. An object approaches or covers at least one first one-dimensional coordinate and at least one second one-dimensional coordinate of the touch panel; at least one mutual capacitance type is determined according to the at least one first one-dimensional coordinate and the at least one second one-dimensional coordinate, respectively. A detection range, and performing mutual capacitance detection on the at least one mutual capacitance detection range to generate a second-dimensional sensing information corresponding to the at least one mutual capacitance detection range; and according to the second (2) The dimensional sensing information determines at least one third-dimensional coordinate and at least one fourth-dimensional coordinate.

In an embodiment of the present invention, the at least one external object includes a first external object, and the touch method further includes the following steps: judging the corresponding to the first external object according to the first unitary dimension sensing information. The first one-dimensional coordinate and the second one-dimensional coordinate to determine A first mutual-capacitance detection range; performing mutual-capacitance detection on the first mutual-capacitance detection range to generate the second-dimensional sensing information corresponding to the first mutual-capacitance detection range; And judging the third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the first external object according to the second-dimensional sensing information.

The at least one external object further includes a second external object, and the touch method further includes the following steps: judging the first one-dimensional coordinate corresponding to the second external object and the first external dimension according to the first-dimensional sensing information. The second one-dimensional block determines a second mutual capacitance detection range; at the same time, mutual capacitance detection is performed on the second mutual capacitance detection range and the second mutual capacitance detection range to generate a response corresponding to The second mutual-capacitance detection range and the second mutual-dimension detection range of the second mutual-capacitance detection range; and determining the corresponding to the first external object according to the second mutual-capacitance detection information The third one-dimensional coordinate and the fourth one-dimensional coordinate and the third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the second external object.

The first mutual capacitance detection range and the second mutual capacitance detection range may be separated or overlapped.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of patent application for the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed by the present invention should be included in the following The scope of patent applications.

Claims (20)

A touch processor is electrically coupled to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes, wherein the touch processor performs the following steps: in a first period, determines a first At least one first driving electrode and at least one first sensing electrode touched or approached by an external object, and determining at least one second driving electrode and at least one second sensing electrode touched or approached by a second external object; and In a second period, a first mutual capacitance detection is performed on the X driving electrodes and the Y sensing electrodes, wherein the X driving electrodes include the at least one first driving electrode and the Y sensing electrodes include The at least one first sensing electrode, X is less than M, Y is less than or equal to N, and a second mutual capacitance detection is performed on the J driving electrodes and the K sensing electrodes, wherein the J driving electrodes include the at least one The second driving electrodes, the K sensing electrodes include the at least one second sensing electrode. According to the touch processor of the first patent application range, the second period is shorter than the first period. According to the touch processor of the second patent application scope, it is further executed: during the first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N An electrical signal; and detecting the at least one first driving electrode and the at least one first sensing electrode according to the M x N first electrical signals, thereby determining whether the first external object is at the first A first touch position of the time period. According to the touch processor of claim 3, the full-screen mutual capacitance detection includes the following steps: driving each driving electrode in sequence; the driving electrode driven by mutual capacitance detection corresponds to the N sensing electrodes The first electrical signals of the N sensing points of the measuring electrode, wherein the N first electrical signals are obtained in D sub-periods, and in each sub-period, the N / D sensing points are continuously detected. A first electrical signal, wherein Y is less than or equal to N / D; and obtaining the M x N first electrical signals according to the N first electrical signals of each driving electrode. According to the touch processor of the second item of the patent application, the execution is further performed: according to the first mutual capacitance detection, X x Y second electrical signals are obtained to determine a first external object in the second period. Second touch position. According to the touch processor of item 2 of the patent application, where J is less than M and K is less than or equal to N. According to the touch processor of item 6 of the patent application, it is further executed: during the first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N An electrical signal; and detecting the at least one second driving electrode and the at least one second sensing electrode according to the M x N first electrical signals, thereby determining whether the second external object is at the first A third touch position of the time period. According to the touch processor in the second item of the patent application, it is further executed: according to the second mutual capacitance detection, J x K second electrical signals are obtained to determine a second external object in the second time period. Fourth touch position. A touch method is applied to a touch panel. The touch panel includes M driving electrodes and N sensing electrodes, wherein the touch processor performs the following steps: in a first period, determines a first external object Touching or approaching at least one first driving electrode and at least one first sensing electrode, and determining at least one second driving electrode and at least one second sensing electrode being touched or approached by a second external object; and executing a The first mutual capacitance is detected at X driving electrodes and Y sensing electrodes, wherein the X driving electrodes include the at least one first driving electrode, and the Y sensing electrodes include the at least one first sensing electrode. , X is less than M, Y is less than or equal to N, and a second mutual capacitance detection is performed on the J driving electrodes and the K sensing electrodes, wherein the J driving electrodes include the at least one second driving electrode and the K driving electrodes The sensing electrode includes the at least one second sensing electrode. The touch method according to item 9 of the scope of patent application, wherein the second period is shorter than the first period. According to the touch method of the patent application No. 10, it is further executed: during the first period, a full-screen mutual capacitance detection is performed on the M driving electrodes and the N sensing electrodes to obtain M x N first electrodes. Electrical signals; and detecting the at least one first driving electrode and the at least one first sensing electrode that are touched or approached by the first external object according to the M x N first electrical signals, thereby determining A first touch position of the first external object in the first period. The touch method according to item 11 of the scope of patent application, wherein the full-screen mutual capacitance detection includes the following steps: sequentially driving each driving electrode; the driving electrode driven by mutual capacitance detection corresponds to the N sensing The first electrical signals of the N sensing points of the electrode, wherein the N first electrical signals are obtained in D sub-periods, and in each sub-period, the first electrical signals of the N / D sensing points are continuously detected An electrical signal, wherein Y is less than or equal to N / D; and obtaining the M x N first electrical signals according to the N first electrical signals of each driving electrode. The touch method according to item 10 of the patent application scope further includes: obtaining X x Y second electrical signals based on the first mutual capacitance detection to determine a first external object in the second time period. Second touch position. According to the touch method of claim 10, J is less than M and K is less than or equal to N. The touch method according to item 14 of the patent application scope further includes: performing the full-screen mutual capacitance detection on the M driving electrodes and the N sensing electrodes during the first period to obtain the M x N number of An electrical signal; and detecting the at least one second driving electrode and the at least one second sensing electrode according to the M x N first electrical signals, thereby determining whether the second external object is at the first A third touch position of the time period. The touch method according to item 10 of the patent application scope further includes: obtaining J x K second electrical signals according to the second mutual capacitance detection to determine a first external object in the second time period. Four touch positions. A touch processor is electrically coupled to a touch panel. The touch panel includes a plurality of first conductive bars and a plurality of second conductive bars. The touch processor performs the following steps: sequentially provides driving signals to All the first conductive strips; when each of the first conductive strips is provided with a driving signal, the signals of all the second conductive strips are detected to obtain a first one-dimensional sensing information corresponding to the first conductive strips; One-dimensional sensing information generates first-dimensional sensing information; determining whether at least one external object approaches or covers the touch panel according to the first-dimensional sensing information; and sensing based on the first-dimensional sensing information. When the information determines that there is at least one external object approaching or covering the touch panel, the touch processor further performs the following steps: it is determined that the at least one external object approaches or covers the touch panel according to the first dimensional sensing information. At least one first one-dimensional coordinate and at least one second one-dimensional coordinate; determine at least one mutual according to the at least one first one-dimensional coordinate and the at least one second one-dimensional coordinate, respectively. Capacitive detection range, and performing mutual capacitance detection on the at least one mutual capacitance detection range to generate second second dimension sensing information corresponding to the at least one mutual capacitance detection range; and according to the The second-dimensional sensing information determines at least one third-dimensional coordinate and at least one fourth-dimensional coordinate. The touch processor according to item 17 of the patent application, wherein the at least one external object includes a first external object, and the touch processor further performs the following steps: judging a response based on the first unitary dimension sensing information The first one-dimensional coordinate and the second one-dimensional coordinate of a first external object determine a first mutual capacitance detection range; and perform mutual capacitance detection on the first mutual capacitance detection range to generate The second-dimensional sensing information corresponding to the first mutual capacitance detection range; and determining the third one-dimensional coordinate and the first corresponding to the first external object according to the second-dimensional sensing information Coordinates of the Four One Dimension. According to the touch processor of claim 18, wherein the at least one external object further includes a second external object, and the touch processor further performs the following steps: judging the The first one-dimensional coordinate of the second external object and the second one-dimensional coordinate should be used to determine a second mutual capacitance detection range; at the same time, the second mutual capacitance detection range and the second mutual capacitance type Mutual capacitance detection is performed in the detection range to generate second second dimension sensing information corresponding to the first mutual capacitance detection range and the second mutual capacitance detection range; and according to the second mutual dimension The sensing information determines the third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the first external object and the third one-dimensional coordinate and the fourth one-dimensional coordinate corresponding to the second external object. According to the touch processor of item 19 of the patent application scope, wherein the first mutual capacitance detection range is separated or overlapped with the second mutual capacitance detection range.