CN108287623B

CN108287623B - Detecting device and method of touch screen

Info

Publication number: CN108287623B
Application number: CN201711311121.8A
Authority: CN
Inventors: 叶尚泰
Original assignee: Egalax Empia Technology Inc
Current assignee: Egalax Empia Technology Inc
Priority date: 2013-01-23
Filing date: 2013-01-23
Publication date: 2021-07-23
Anticipated expiration: 2033-01-23
Also published as: CN103941898A; CN108287623A; CN103941898B

Abstract

The invention provides a detection device and a detection method of a touch screen, wherein the detection device of the touch screen comprises the touch screen, a controller and a memory, and only provides the position of a pen in a preset range but not provides the positions of all objects in the preset range, such as the position of a palm, when the approach or the touch of the pen is detected. And, unless the pen is no longer detected for more than the preset time, providing the position of the object except the pen within the preset range again.

Description

Detecting device and method of touch screen

The application is a divisional application of an invention patent application with the application number of 201310025286.4 and the name of a detection device and a method for a touch screen, and the application date of the original application is 2013, 01, 23.

Technical Field

The present invention relates to a capacitive writing device, and more particularly, to a touch screen detection device and method.

Background

A conventional mutual capacitive sensor (mutual capacitive sensor) includes an insulating surface layer, a first conductive layer, a dielectric layer, and a second conductive layer, wherein the first conductive layer and the second conductive layer respectively have a plurality of first conductive strips and second conductive strips, and the conductive strips may be formed by a plurality of conductive strips and connecting lines serially connected to the conductive strips.

In the 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, the driving signal is provided to each of the first conductive strips one by one, and corresponding to each of the first conductive strips provided with the driving signal, the signals of all the second conductive strips are detected to represent the capacitive coupling signals at the intersections between the first conductive strips provided with the driving signal and all the second conductive strips. Therefore, the capacitive coupling signals representing the intersections between all the first conductive strips and the second conductive strips can be obtained to form capacitance value images.

Therefore, the capacitance value image when the touch panel is not touched can be taken as a reference, whether the touch panel is approached or covered by an external conductive object or not can be judged by comparing the difference between the reference and the capacitance value image detected subsequently, and the approached or covered position can be further judged.

However, the difference between the baseline and the subsequently detected capacitance value image is not significantly related to the area of the external conductive object close to or covering the touch screen, and therefore a large enough area is required to be recognized. Such limitations make it necessary for the tip of a passive capacitive stylus to be large, with a diameter of about 4mm or more, making it difficult to see the tip during writing and to accurately write at the desired location.

Further, since the Palm may touch or approach the touch panel during writing, the Palm is disregarded (Palm rejection) except for the position where other external objects are provided. However, the pen may leave the touch screen for a short time during writing, so that the system mistakenly assumes that the hand detection mode is recovered, and the position of the palm is misreported, thereby causing writing errors.

It is thus seen that the above-described prior art is clearly associated with inconveniences and drawbacks that will greatly advance the art. In order to solve the above problems, related manufacturers have tried to solve the problems without diligent attention, but it has not been known that suitable designs have been developed and completed for a long time, and general products and methods have not had appropriate structures and methods to solve the above problems, which is obviously a problem that related manufacturers want to solve. Therefore, how to create a new technology is one of the important research and development issues, and is also an object of great improvement in the industry.

Disclosure of Invention

The invention aims to provide a detection device and a detection method of a touch screen, which only provide the position of a pen in a preset range and do not provide the positions of all objects in the preset range, such as the position of a palm, when detecting the approach or touch of the pen; and, unless the pen is no longer detected for more than the preset time, providing the position of the object except the pen within the preset range again.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, a detecting device for a touch screen comprises: the touch screen is used for detecting a signal of approaching or touching an external conductive object on the touch screen; the controller is used for recording the position of each pen and the area which is close to or touched by other external conductive objects except the pen within the preset range or the preset range of the position of each pen when at least one external conductive object is judged to be the pen according to the signals of the touch screen; and a memory storing flags corresponding to each pen, each flag corresponding to a predetermined range of the corresponding pen, each flag being set to a true value when the controller detects the presence of the corresponding pen, and each flag being set to a false value only when the controller does not detect the presence of the corresponding pen for more than a predetermined time; wherein the controller does not provide the position of all external conductive objects within the predetermined range corresponding to each flag being set to true.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the above-mentioned detection device for a touch screen, only one pen is provided and the predetermined range is the entire touch screen, wherein the controller only provides the position of the pen when the flag corresponding to the pen is set to true value, and does not provide the positions of the external conductive objects except the pen.

In the above detecting device of the touch screen, the corresponding preset range is maintained within the latest preset range when the position of the pen corresponding to each flag is not detected.

In the above-mentioned detection device for a touch screen, the range of the hand moves along with the position movement of the corresponding pen.

In the above detecting device of the touch screen, the controller deletes each flag set as a false value, and adds a flag of a position of a pen when detecting the pen without the corresponding flag.

The purpose of the invention and the technical problem to be solved can also be realized by adopting the following technical scheme. According to the detection method of the touch screen provided by the invention, the method comprises the following steps: providing a signal for approaching or touching an external conductive object on the touch screen; when at least one external conductive object is judged to be a pen according to the signals of the touch screen, recording the position of each pen and the area which is close to or touched by other external conductive objects except the pen within the preset range or the preset range of the position of each pen; providing flags corresponding to the position of each pen, and each flag corresponding to a preset range of the position of the corresponding pen; setting the corresponding flag to true value when the position of each pen is detected; setting the flag as a false value when the pen corresponding to each flag is not detected for more than a preset time; and providing the position of each pen and the position of each external conductive object which is not in the preset range corresponding to each flag set to be true.

In the detection method of the touch screen, only one pen is provided and the predetermined range is the whole touch screen, wherein the controller only provides the position of the pen when the flag corresponding to the pen is set to true value, and does not provide the positions of the external conductive objects except the pen.

In the detection method of the touch screen, the corresponding preset range is maintained within the latest preset range when the position of the pen corresponding to each flag is not detected.

In the detection method of the touch screen, the range of the hand moves along with the position movement of the corresponding pen.

In the detection method of the touch screen, the controller deletes each flag set as a false value, and adds a flag of a pen position when detecting a pen position without a corresponding flag.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, a detecting device for a touch screen comprises: the touch screen is used for detecting a signal of approaching or touching an external conductive object on the touch screen; the controller judges whether each external conductive object is a pen or not according to the signal of the touch screen; and a memory storing flags corresponding to each pen, each flag being set to a true value when the controller detects the presence of the corresponding pen, and each flag being set to a false value only when the controller does not detect the presence of the corresponding pen for more than a predetermined time; wherein the controller only provides the position of each pen when at least one flag corresponding to the pen is set to a true value.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the detection method of the touch screen provided by the invention, the method comprises the following steps: providing a signal for approaching or touching an external conductive object on the touch screen; judging whether each external conductive object is a pen or not according to the signal of the touch screen; providing a flag corresponding to each pen; setting the corresponding flag to true value when each pen is detected; setting the flag as a false value when the pen corresponding to each flag is not detected for a predetermined time; and providing only the position of each pen when at least one flag corresponding to the pen is set to true.

The method for detecting a touch screen further includes deleting each flag set as a false value.

By the technical scheme, the invention at least has the following advantages and beneficial effects: by means of the invention, when the palm is stuck to the touch screen to hold the pen for writing, the pen leaves the touch screen for a short time and the palm can still be ignored.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIGS. 1A and 1B are schematic diagrams of a mutual capacitance sensor.

Fig. 1C to 1E are schematic diagrams of a small-nib capacitive pen approaching or contacting a touch screen according to a first embodiment of the invention.

Fig. 1F to 1G are schematic diagrams illustrating a method for determining proximity or contact of a capacitive stylus with a small pen point according to a first embodiment of the invention.

FIG. 2A is a flowchart illustrating a process of detecting a small-area proximity or contact according to a first embodiment of the present invention.

Fig. 2B to 2G are schematic diagrams illustrating a first region and a second region according to a first embodiment of the invention.

Fig. 3A and 3B are schematic diagrams of a capacitance pen according to a second embodiment of the invention.

Fig. 4A and 4B are schematic diagrams illustrating an operation of a capacitive stylus according to a third embodiment of the invention.

Fig. 4C is a schematic diagram of a shielding conductive strip according to a third embodiment of the invention.

FIG. 4D is a circuit diagram of a synchronous phase according to a third embodiment of the present invention.

Fig. 5A to 5F are schematic diagrams illustrating a method for writing with palm neglecting hand according to a fourth embodiment of the present invention.

Fig. 6 and 7 are schematic flow charts of a method for writing with palm-disregarding hand according to a fourth embodiment of the present invention.

[ description of main element symbols ]

100: the position detection device 110: display device

120. 34, 51: the touch screen 120A: first sensing layer

120B: driving/detecting unit of second sensing layer 130

140: conductive strip

140A, Tx1, Tx 2: first conductive strip

140B, Rx 2: second conductive strip 160 controller

161: the processor 162: memory device

170: the host computer 171: central processing unit

173: storage unit P: capacitance pen

V1, V2, V3, V23, V32: capacitive coupling variation

PWM: pulse width modulation signal T1: first threshold value

T2: second threshold limit 30: capacitance pen

31: conductive pen body 32: conductive pen head

33: contact portion 35: deformed contact portion

40: conductive pen body 41: conductive pen head

St, Sr: signal 43: shielding conductive strip

A1: first amplifier a 2: a second amplifier

SC: control signal BPF: bandwidth filter

45: adders 46, 47: switch with a switch body

52: the pen 53: hand (W.E.)

54: pen contact area 55: area of hand contact

56: image 57: area of pen proximity or touch

58: hand approach or touch area 59: range of

Detailed Description

The present invention will be described in detail with reference to some examples. However, the invention is capable of other embodiments in addition to those disclosed. The scope of the invention is not limited by the embodiments, but is subject to the claims. In order to provide a clear description and an understanding of the present invention, the various parts are not drawn to scale relative to each other, some dimensions are exaggerated relative to other dimensions, and irrelevant details are not shown in full for the sake of clarity.

Referring to fig. 1A, a position detecting device 100 suitable for the present invention includes a touch screen 120 and a driving/detecting unit 130. The touch screen 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 first sensing layer 120A and the second sensing layer 120B have a plurality of conductive strips 140, respectively, wherein the plurality of first conductive strips 140A of the first sensing layer 120A overlap the plurality of second conductive strips 140B of the second sensing layer 120B. In another example of the present invention, a plurality of first conductive strips 140A and second conductive strips 140B can be disposed in a coplanar sensing layer. The driving/detecting unit 130 generates sensing information according to signals of the plurality of conductive strips 140. For example, in the self-capacitance detection, the driven conductive bar 140 is detected, and in the mutual capacitance detection, the part of the conductive bar 140 that is not directly driven by the driving/detecting unit 130 is detected. The touch screen 120 may be disposed on the display 110, and a shielding layer (not shown) may be disposed between the touch screen 120 and the display 110 or not. In the preferred embodiment of the present invention, no shielding layer is disposed between the touch screen 120 and the display 110 in order to make the thickness of the touch screen 120 thinner.

The first conductive strips and the second conductive strips may be a plurality of row conductive strips and a plurality of column conductive strips arranged in rows or columns, a plurality of first dimension conductive strips and a plurality of second dimension conductive strips arranged in a first dimension and a second dimension, or a plurality of first axis conductive strips and a plurality of second axis conductive strips arranged along a first axis and a second axis. In addition, the first conductive strips and the second conductive strips may be overlapped orthogonally or non-orthogonally. For example, in a polar coordinate system, one of the first conductive strips or the second conductive strips may be arranged radially, and the other of the first conductive strips or the second conductive strips may be arranged annularly. Furthermore, one of the first conductive strip or the second conductive strip can be a driving conductive strip, and the other of the first conductive strip or the second conductive strip can be a detecting conductive strip. The "first dimension" and "second dimension", "first axis" and "second axis", "driving" and "detecting", "driven" and "detected" conductive strips can be used to refer to the "first" and "second" conductive strips, including but not limited to orthogonal grid structures (orthogonal grids), and other geometric configurations having overlapping (intersecting) conductive strips with first and second dimensions.

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

In another example of the present invention, the controller 160 and the host 170 include a transmission interface, and the control unit transmits data to the host through the transmission interface, which can be known by those skilled in the art to include but not limited to UART, USB, I2C, Bluetooth, WiFi, IR, and other wired or wireless transmission interfaces. In examples of the present invention, the transmitted data may be location (e.g., coordinates), recognition results (e.g., gesture codes), commands, sensing information, or other information that may be provided by the controller 160.

In the present example, the sensing information may be initial sensing information (initial sensing information) generated by the processor 161, and the initial sensing information is submitted to the host 170 for location analysis, such as location analysis, gesture determination, command recognition, and the like. In another example of the present invention, the sensed information may be analyzed by the processor 161 and then the determined position, gesture, command, etc. is submitted to the host 170. The present invention includes, but is not limited to, the aforementioned examples, and one of ordinary skill in the art can understand the interaction between the other controllers 160 and the host 170.

In the overlapping area of each conductive strip, the upper and lower conductive strips form two poles. Each overlap region can be regarded as a pixel (pixel) in an image (image), and when one or more external conductive objects are close to or touch, the image can be regarded as a touched image (such as a structure (pattern) of a sensing device touched by a finger).

When the driven conductive strip is provided with a driving signal, the driven conductive strip itself forms self capacitance (self capacitance), and each overlapped area on the driven conductive strip forms mutual capacitance (mutual capacitance). The self-capacitance detection detects the self-capacitance of all the conductive strips, and is particularly suitable for determining the approach or contact of a single external conductive object.

In the mutual capacitance detection, when the driven conductive strips are provided with the driving signals, all the detected conductive strips arranged in different dimensions from the driven conductive strips detect the capacitance or capacitance variation of all the overlapping areas on the driving conductive strips, so as to be regarded as row pixels in the image. Accordingly, the pixels of all the rows are collected to form the image. When one or more external conductive objects approach or touch, the image can be regarded as a photographed image, and is particularly suitable for judging the approach or the touch of the external conductive objects.

The conductive strips (the first conductive strips and the second conductive strips) may be made of transparent or opaque material, such as transparent Indium Tin Oxide (ITO). The structure can be divided into a Single-layer Structure (SITO) and a Double-layer structure (DITO). Those skilled in the art can deduce the material of other conductive strips, which is not described herein. For example, carbon nanotubes.

In an example of the present invention, the transverse direction is used as the first direction, and the longitudinal direction is used as the second direction, so that the transverse conductive strip is the first conductive strip, and the longitudinal conductive strip is the second conductive strip. It will be understood by those skilled in the art that the foregoing description is illustrative of the invention and is not to be construed as limiting the invention. For example, the longitudinal direction may be the first direction, and the lateral direction may be the second direction. In addition, the number of the first conductive strips and the number of the second conductive strips may be the same or different, for example, the first conductive strips have N strips, and the second conductive strips have M strips.

During the two-dimensional mutual capacitance detection, the alternating driving signals are sequentially provided to each first conductive strip, and the one-dimensional sensing information corresponding to each conductive strip provided with the driving signals is obtained through the signals of the second conductive strips, and the two-dimensional sensing information is formed by collecting the sensing information corresponding to all the first conductive strips. The one-dimensional sensing information may be generated according to the signal of the second conductive strip, or may be generated according to a difference between the signal of the second conductive strip and a reference. In addition, the sensing information may be generated according to the current, voltage, capacitive coupling amount, charge amount or other electronic characteristics of the signal, and may exist in an analog or digital form.

When no external conductive object is actually close to or covers the touch screen, or the system does not judge that the external conductive object is close to or covers the touch screen, the position detection device can generate a reference by the signal of the second conductive strip, and the reference represents stray capacitance on the touch screen. The sensing information may be generated according to the signal of the second conductive strip or generated by subtracting the reference from the signal of the second conductive strip.

In the prior art, a capacitive pen (capacitive pen) is generally used as an extension of a hand, and an area in contact with a touch screen needs to be close to a normal area of the touch screen contacted by a finger, so that a sufficient signal change can be obtained to correctly determine a contacted position. The area is approximately the area that covers the intersection of the plurality of conductive strips.

Referring to fig. 1C to 1E, a capacitance pen with a small pen point according to a first embodiment of the invention is shown. The pen tip of the capacitance pen P is in contact coupling with the pen body, so that a hand holding the pen body can be in capacitive coupling with the touch screen through the pen tip. In addition, the diameter of the contact between the tip of the capacitive pen P and the touch screen is less than about 3mm, and in a preferred example of the present invention, the diameter of the contact between the tip of the capacitive pen P and the touch screen is about 2.2 mm. In mutual capacitance detection, when a driving signal (e.g., pulse-width modulation (PWM)) is provided to a first conductive strip (e.g., first conductive strip Tx1 or Tx2), the variation of capacitive coupling at each intersection on the first conductive strip is detected by each second conductive strip (e.g., second conductive strip Rx2) that intersects the first conductive strip. When the capacitive pen P approaches or touches the intersection (e.g., the intersection of the first conductive strip Tx2 and the second conductive strip Rx2), the detected capacitive coupling variation V1 may be greater than the first threshold T1, but when the capacitive pen P moves to the middle of two intersections (e.g., the intersection of the first conductive strip Tx1 and the second conductive strip Rx2 and the intersection of the first conductive strip Tx2 and the second conductive strip Rx2), the capacitive coupling variations V2 and V3 at the two intersections are lower than the first threshold T1, so that the pen position cannot be determined.

Therefore, referring to fig. 1F and 1G, when the change amount of the capacitive coupling at the intersection is higher than the second threshold T2 but not higher than the first threshold T1, the change amount of the capacitive coupling at the adjacent intersection (e.g., V23, V32) is added to determine whether the change amount exceeds the threshold to determine whether the capacitive pen P is located between the two intersections.

In an example of the present invention, the sum of the capacitive coupling variations may be a sum of the capacitive coupling variations at one or more intersections of the same driven conductive strip (first conductive strip). For example, when a first conductive strip is provided with a driving signal, the values of the capacitive coupling variations detected by consecutive second conductive strips form sensing information corresponding to the first conductive strip, and each of the sensing information is greater than the second threshold and smaller than the first threshold, which may be the previous value or the next value in the sum sensing information, and then determines whether the value is greater than the first threshold.

In another example of the present invention, the sensing information (one-dimensional sensing information) corresponding to the plurality of conductive bars constitutes an image (two-dimensional sensing information). Each of the sensing information is greater than the second threshold and less than the first threshold, and is the capacitance coupling variation at the adjacent intersection in the sum image.

Referring to fig. 2A, a method for detecting a capacitive pen with a small pen point according to the present embodiment is shown. In step 210, an image of the capacitive coupling variations is obtained. The image of the capacitive coupling variation may be obtained by first obtaining an image of the touch screen when the touch screen is not being touched or touched by any external conductive object, and then obtaining the image again or successively. The variation of the image acquired each time and the reference image is a capacitive coupling variation image. The value of the capacitive coupling variation image corresponds to a plurality of driven conductive strips (first conductive strips), and the value corresponding to each driven conductive strip is generated according to signals of a plurality of detected conductive strips. Each driven conductive strip (e.g., the first conductive strip) and the detected conductive strip (e.g., the second conductive strip) can correspond to the horizontal coordinate and the vertical coordinate, respectively. When the driving signal is provided to the driven conductive bar each time, the coordinates of each intersection on the driven conductive bar are the two-dimensional coordinates of the intersection of the overlapped driven conductive bar and the detected conductive bar, such as (the coordinates of the driven conductive bar, the coordinates of the detected conductive bar).

In the present invention, two or more driven conductive strips adjacent to each other may be driven at a time. For example, when there are N first conductive strips, a driving signal is simultaneously provided to two adjacent first conductive strips each time, at least one of the two first conductive strips driven each time is different, and the driving is performed N-1 times in total. For only one first conductive strip is driven each time, a capacitive coupling variation image (two-dimensional sensing information) composed of N pieces of one-dimensional sensing information is generated, and for two adjacent first conductive strips, N-1 capacitive coupling variation images composed of one-dimensional sensing information are generated each time. In this example, the coordinates of each intersection are two-dimensional coordinates consisting of the coordinates of the center between two driven conductive bars and the coordinates of the detected conductive bar.

Next, in step 220, each intersection where the detected value is smaller than the first threshold and larger than the second threshold is used as the detected intersection. Then, in step 230, each first region is detected, the first region includes a detected intersection and an adjacent intersection, the detected intersection and the adjacent intersection correspond to different driven conductive strips, and the sum of the values of the first region (the sum of the detected intersection and the adjacent intersection) is greater than the first threshold. Next, in step 240, each second area is detected, the second area includes four intersections (the intersection is detected to be three other intersections), each intersection is adjacent to two other intersections in the second area, and the sum of the values corresponding to the second area (the sum of the values at the intersection is detected to be three other intersections) is greater than the first threshold. In an example of the present invention, the second region is detected when no first region is detected. In another example of the present invention, the second region is detected regardless of whether any first region is detected. In step 250, when the value of the adjacent or neighboring intersection of the first region or the second region is smaller than the third threshold, it is determined that the first region or the second region is a region where the external conductive object is close to or in contact with.

Referring to fig. 2B to 2G, the arrays shown represent a plurality of intersections (intersection 00, intersection 01, …, intersection 04, intersection 10, intersection 11, intersection … and intersection 44) where 5 first conductive strips (driven conductive strips) and 5 second conductive strips (detected conductive strips) intersect, where

intersection

00,01,02,03,04 is the intersection on first conductive strip T0,

intersection

10,11,12,13,14 is the intersection on first conductive strip T1, and so on.

Assuming that the intersection 22 is detected as a detected intersection in step 220, the possible first area is the

intersection

12,22 or the

intersection

22,32 in step 230, as shown in fig. 2B and 2C, respectively. When the sum of the values of the

intersections

12,22 is greater than the first threshold, the

intersections

12,22 are detected as the first area. Alternatively, when the sum of the values of the

intersections

22,32 is determined to be greater than the first threshold, the

intersections

22,32 are detected as the first area. Conversely, if neither the sum of the values at

intersections

12,22 nor the sum of the values at

intersections

22,32 exceeds the first threshold, then the first region is not detected.

In addition, in step 240, the possible second regions are the

intersections

11,12,21,22 of fig. 2D, the

intersections

12,13,22,23 of fig. 2E, the

intersections

21,22,31,32 of fig. 2F and the

intersections

22,23,32,33 of fig. 2G, respectively, as shown in fig. 2D to 2G. When the sum of the values at the four intersections in any of fig. 2D-2G exceeds the first threshold, the second region is detected. In contrast, when the sum of the values at the four intersections in the graphs of fig. 2D to 2G without any graph exceeds the first threshold, the second region is not detected.

In addition, in step 250, it is assumed that the first region is as shown in fig. 2B. In an example of the present invention, the adjacent intersections of the first area may be

intersections

02,11,13,21,23, 32. In another example of the present invention, the proximity intersection of the first region may be 01,02,03,11,13,21,23,31,32, 33. The adjacent or neighboring intersections of fig. 2C-2G and so on will not be described again.

In addition, in the best mode of the invention, the second threshold and the third threshold are 1/2 and 1/4 of the first threshold, respectively, wherein the first threshold > the second threshold > the third threshold. Those skilled in the art can understand the first threshold, the second threshold and the third threshold, and the invention is not limited to the first threshold, the second threshold and the third threshold.

In a preferred embodiment of the present invention, the tip of the capacitive stylus is a thin tip with a maximum width of about 2mm to 3mm, which is smaller than the shortest distance between two parallel conductive bars or between two parallel driven conductive bars. For example, less than the distance between the center of a conductive strip and the center of another adjacent conductive strip or less than the distance between the center of a first conductive strip and the center of another adjacent first conductive strip.

The algorithm provided in accordance with FIG. 2A is as follows. DD [ i ] [ j ] represents the intersection being detected in step 220.

In light of the foregoing, the present invention is directed to an apparatus for detecting small area contact or proximity. According to step 210, the present invention includes an apparatus for obtaining an image of capacitive coupling variations from a capacitive touch screen. The capacitive touch screen is provided with a plurality of driven conductive strips provided with driving signals and a plurality of detected conductive strips providing capacitive coupling variation. Each time the driving signal is provided, one or more driven conductive strips simultaneously provided with the driving signal and one or more intersections of each detected conductive strip generate capacitive coupling, and each value of the capacitive coupling variation image is the capacitive coupling variation of one of the intersections.

According to step 220, the present invention includes means for detecting each detected intersection from the image of the capacitive coupling variations, wherein the detected intersection has a value less than a first threshold and greater than a second threshold.

According to step 230, the present invention includes means for detecting each first region, each first region includes one of the detected intersections and an adjacent intersection adjacent to the detected intersection, and the sum of the values of the first regions is greater than a first threshold.

According to step 240, the method includes detecting each of the second regions, each of the second regions including four adjacent intersections including one of the detected intersections, and the sum of the values of the second regions is greater than a first threshold. As described above, the second region may be detected when no first region is detected, or the second region may be detected regardless of whether any first region is detected.

According to step 250, the present invention includes means for determining the first area or the second area that the external conductive object approaches or contacts when the at least one first area or the at least one second area is detected, wherein the values of all intersections adjacent to the first area or the second area that the external conductive object approaches or contacts are smaller than a third threshold value.

The touch screen may have a plurality of driven conductive strips provided with driving signals and a plurality of detected conductive strips providing capacitive coupling variation, and capacitive coupling is generated at one or more intersections of one or more driven conductive strips simultaneously provided with the driving signals and each detected conductive strip each time the driving signals are provided. Based on the capacitive coupling, the detected conductive strip provides a capacitive coupling variation at the intersection, and each value of the capacitive coupling variation image is the capacitive coupling variation at one of the intersections.

As described above, in the present example, the first threshold > the second threshold > the third threshold. For example, the second threshold value is 1/2 and the third threshold value is 1/4 of the first threshold value. In addition, in the best mode of the invention, the maximum width of the small area approaching or contacting is less than or equal to the distance between the centers of two adjacent conductive strips. For example, the maximum width of the small area close to or in contact with the conductive strip is less than or equal to 3mm, and the distance between the centers of the two conductive strips is less than or equal to 6.5 mm. The two adjacent conductive strips can be two driven conductive strips or detected conductive strips which are arranged in parallel and adjacent.

The maximum width of the small-area approach or contact refers to the maximum width of the touch screen of the present invention for detecting the application range of the small-area approach or contact, and does not refer to the maximum width of the touch screen of the present invention for detecting the approach and contact of the external conductive object. When the approach and contact of the external conductive object is larger than the maximum width of the small area approach or contact, a general detection method can be adopted, for example, the direct judgment is not carried out by judging the first area or the second area. Therefore, the invention can detect the approach and the contact of a common external conductive object and can also detect the small-area approach or the contact of the external conductive object. For example, when the external conductive object is a pen, the area of the pen coupled to the touch screen in proximity or contact is less than or equal to the maximum width of the aforementioned small area in proximity or contact. For another example, when the external conductive object is close to (e.g., floating above) the touch screen, the area of the external conductive object capacitively coupled to the touch screen is relatively smaller than the area of the external conductive object contacting the touch screen and capacitively coupled to the touch screen, and the maximum width of the external conductive object capable of capacitively coupling to the touch screen is smaller than or equal to the aforementioned small area proximity or contact area, which can be regarded as the proximity of the small area external conductive object.

Accordingly, in an example of the present invention, the method further includes: and detecting each intersection with the value larger than the first threshold value by using the capacitive coupling variation image, and judging that the small area of each external conductive object is close to or contacted with a single intersection when at least one intersection with the value larger than the first threshold value is detected, wherein all the intersections adjacent to the single intersection with the small area of each external conductive object being close to or contacted with each other are smaller than the first threshold value.

In the present example, step 250 is performed after step 230. Furthermore, step 250 may also be performed after step 240. In another example of the present invention, step 250 is performed after

steps

230 and 240 are performed.

Referring to fig. 3A and 3B, a capacitive pen 30 according to a second embodiment of the invention includes a conductive pen body 31 and a conductive pen tip 32. The conductive pen point is in contact coupling with the conductive pen body, when the conductive pen body is in contact with a hand or a human body of a held pen, the conductive pen point is in contact coupling with the hand or the human body through the conductive pen body, and the conductive pen point is in coupling with the ground through the human body. In the present embodiment, the conductive tip 32 is made of a conductive fiber, which is hardened by optical hardening or thermal hardening after being glued. In addition, the conductive pen tip 32 further includes a contact portion 33, wherein the contact portion 33 is hardened to a different degree than a portion of the non-contact portion of the conductive pen tip 32, the contact portion 33 is softer than the portion of the non-contact portion of the conductive pen tip 32, and when writing on the touch screen 34, the contact portion 33 is deformed due to resistance or touch pressure, and becomes a deformed contact portion 35, thereby increasing the contact area. In a preferred embodiment of the present invention, the contact diameter between the contact portion 33 and the touch screen 34 is between about 3mm and 1 mm. In an example of the present invention, the conductive tip is a bundled (collecting) conductive fiber extending in the same direction as the conductive body, in other words, each conductive fiber extends from the conductive body to the tip, and part or all of the conductive fibers extend from the contact portion to the contact portion. The gluing of the conductive fibres may be by means of a conductive glue. Those skilled in the art can deduce the material of the conductive fiber (e.g., conductive polyester, conductive polyamine, etc.) and the conductive adhesive (e.g., ultraviolet light-cured conductive adhesive), and will not be described herein again.

In addition, the conductive pen tip may further include a conductive support portion (not shown), and the conductive support portion may be made of metal or nonmetal, such as copper rod or graphite rod. In addition, the top end of the contact portion may further include a recessed portion, which provides a space for the contact portion 33 to be recessed inward, and may be larger than a space without the recessed portion. The contact portion 33 is conical, and the apex of the cone may be provided with the aforementioned notch.

In the present example, the maximum width of the contact portion 33 contacting the touch screen 34 is smaller than the distance between the center lines of the two conductive strips arranged in parallel on the touch screen 34. In the present embodiment, the contact portion 33 contacts at most two parallel conductive strips. In another example of the present invention, the contact portion 33 contacts at most two adjacent intersections.

Accordingly, a capacitive writing device of the present invention includes: capacitive pen, touch-sensitive screen and control circuit. The capacitance pen comprises a conductive pen body and a conductive pen point, wherein the conductive pen body is in contact coupling with the conductive pen point, the conductive pen point comprises a contact part and a non-contact part, the contact part is softer than the non-contact part, the conductive pen point is glued by conductive fibers, and part or all of the conductive fibers extend from the non-contact part to the contact part. In addition, the touch screen is provided with a plurality of driven conductive strips provided with driving signals and a plurality of detected conductive strips providing capacitive coupling variation, and capacitive coupling is generated at the intersection of one or more driven conductive strips simultaneously provided with the driving signals and each detected conductive strip each time the driving signals are provided. In addition, when the capacitive pen is held on the touch screen by an external conductive object (such as the aforementioned hand or human body), the control circuit determines the position of the capacitive pen on the touch screen according to the variation of the capacitive coupling generated at the intersection.

According to the above-mentioned apparatus for detecting a small-area contact or proximity, the detection circuit may include: a device for obtaining an image of capacitive coupling variation from a capacitive touch screen, wherein each value of the image of capacitive coupling variation is a capacitive coupling variation at one of the intersections; means for detecting intersections where each value is greater than a first threshold from the capacitive coupling variation image; and means for determining a single intersection of each capacitive pen approaching or touching when at least one intersection having a value greater than a first threshold is detected, wherein all intersections adjacent to the single intersection of each capacitive pen approaching or touching are less than the first threshold.

The detection circuit may also include: a device for obtaining an image of capacitive coupling variation from a capacitive touch screen, wherein each value of the image of capacitive coupling variation is a capacitive coupling variation at one of the intersections; means for detecting each detected intersection from the capacitive coupling variance image, wherein the detected intersection has a value less than a first threshold and greater than a second threshold; and means for detecting each first region, each first region including one of the detected intersections and an adjacent intersection adjacent to the detected intersection, and a sum of values of the first regions being greater than a first threshold; and means for determining that the stylus is proximate to or in contact with the first area when the at least one first area is detected, wherein values of all intersections adjacent to the first area proximate to or in contact with the capacitive stylus are less than a third threshold.

Furthermore, the detection circuit may further include: means for detecting each second region when no first region is detected, each second region including four adjacent intersections including the detected intersection, and a sum of values of the second regions being greater than a first threshold; and means for determining that the stylus is proximate to or in contact with the second area when the at least one second area is detected, wherein values of all intersections adjacent to the second area proximate to or in contact with the capacitive stylus are less than a third threshold.

In the best mode of the invention, the first threshold > the second threshold > the third threshold. For example: the second threshold is 1/2 of the first threshold and the third threshold is 1/4 of the first threshold.

In addition, in the exemplary embodiment of the present invention, the maximum width of the contact between the capacitive pen and the touch screen is smaller than the distance between the centers of two parallel-arranged adjacent conductive strips, wherein the two parallel-arranged adjacent conductive strips are the driven conductive strips or the detected conductive strips. In another example of the present invention, each of the determined first or second areas of the capacitive pen in proximity to or in contact with the touch screen is the first or second area of the capacitive pen in proximity to or in contact with the touch screen, respectively, wherein the maximum width of the pen in contact with the touch screen is less than or equal to 3 mm.

Referring to fig. 4A and 4B, a capacitive pen according to a third embodiment of the invention includes a conductive pen body 40 and a conductive pen tip 41. Referring to FIG. 4A, when the conductive tip 41 approaches or touches the touch screen, the conductive tip 41 capacitively couples with the driven conductive strips to which the driving signal (e.g., PWM) is provided, and the capacitive stylus provides an output signal capacitively coupled with the touch screen during the period when the driving signal is no longer provided to any driven conductive strip according to the capacitively coupled driving signal, as shown in FIG. 4B. The output signal will capacitively couple with conductive strips of the touch screen to provide a detected signal, e.g. at least one first conductive strip Tx to provide signal St, and at least one second conductive strip Rx to provide signal Sr. According to the scanning of the first conductive strip Tx and the second conductive strip Rx, the position of the capacitive pen can be determined according to the signals St and Sr.

The capacitive pen may be a built-in power supply device for the hard capacitive pen to provide the power required in the process of outputting the signal. In addition, the capacitance pen can generate the power required in the process of outputting the signal by external electromagnetic induction. Referring to fig. 4C, the capacitive touch screen includes at least one shielding conductive line 43, which is provided with a dc signal in a first mode (or period) to shield the conductive strips from external noise. In addition, the shielding wire 43 is supplied with an ac signal in the second mode to form a coil to provide a magnetic field, so that the capacitive stylus can obtain part or all of the required power through electromagnetic induction of the magnetic field provided by the shielding wire 43. The number of turns of the coil around the conductive strip may be one or more. In addition, the capacitive stylus may further include a capacitor or a power storage device (e.g., a battery) that stores power from the coil, and may further continue to provide power to the capacitive stylus when power to the coil ceases.

Fig. 4D shows a signal conversion circuit inside the capacitance pen. The main components include a first amplifier A1, a summer 45, a second amplifier A2, and a bandwidth filter (BPF). When the driving signal is coupled to the conductive nib 41, the capacitively coupled signal is amplified by the first amplifier. In addition, the adder, the second amplifier and the bandwidth filter form an oscillation feedback loop for providing an output signal which is synchronous with the phase of the touch screen signal, and the output signal is output by the pen point.

As will be understood by those skilled in the art, the adder 45, the second amplifier a2 and the bandwidth filter BPF form an oscillation feedback loop. The working frequency of the oscillation feedback loop is the same as the frequency of the driving signal, and the phase of the delayed driving signal may be different from the phase of the driving signal before the oscillation feedback loop receives the driving signal. When the delayed driving signal is transmitted to the touch screen, the control circuit can detect the delayed driving signal according to the phase of the original driving signal.

In the exemplary embodiment of the present invention, the two terminals of the oscillation feedback loop further include switches (switches 46 and 47), respectively, controlled by the control signal SC provided by the control circuit. The switch can be used for delaying the output signal from the pen head so as to be staggered with the time when the driving signal is provided. For example, the control signal is provided according to the output of a counter or a controller (not shown), and the output signal of the feedback loop is allowed to be output from the conductive pen tip after a certain number of counts or a certain period of time. Accordingly, the driving signal is amplified by the first amplifier a1 and then provided to the oscillation feedback loop through the switch 46, at this time, the switch 46 is turned on and the switch 47 is turned off according to the control signal SC, and the output signal of the second amplifier a2 in the oscillation feedback loop is synchronized with the phase of the driving signal after a period of time. After a certain number of counts or a period of time has elapsed, the control signal SC controls the switch 46 to be off and the switch 47 to be on, so that a delayed driving signal after the certain number of counts or the period of time has elapsed can be output from the conductive pen tip 41. Those skilled in the art can understand that the receiving of the driving signal and the outputting of the delayed driving signal can be performed by different electrodes, but in the best mode of the present invention, the receiving of the driving signal and the outputting of the delayed driving signal are performed by the same electrode, and the receiving of the driving signal and the outputting of the delayed driving signal performed by a single electrode do not occur simultaneously.

In accordance with the above, the present invention provides a wireless capacitive writing device comprising: touch-sensitive screen, electric capacity pen and controller. The capacitive pen is provided with a conductive pen point and a signal conversion circuit, the conductive pen point receives a driving signal from the touch screen, and the driving signal can be received by the electrode or the coil. The signal conversion circuit generates a delay driving signal in a delay preset time according to the driving signal, and the delay driving signal is transmitted to the touch screen through the conductive pen point, wherein the driving signal and the delay driving signal have the same frequency and phase. The delayed drive signal may be present before the drive signal is received, but is not output from the conductive stylus. After receiving the driving signal, the signal conversion circuit synchronizes the delay driving signal with the driving signal, and the delay driving signal is output by the conductive pen point after counting for a certain number of times or after a period of time.

The controller detects the position of the at least one external conductive object according to the change of the capacitive coupling of the driving signal between the touch screen and the at least one external conductive object in the passive mode, and detects the position of the capacitive pen according to the delay driving signal received by the capacitive pen in the active mode. In addition, in the passive mode, the controller detects the position of the at least one external conductive object while the driving signal is provided, and in the active mode, the controller detects the position of the capacitive stylus while the driving signal is not provided.

In addition, in the active mode, the driving signal may be provided to one conductive strip at a time by scanning, until all of the first conductive strips, all of the second conductive strips, or all of the conductive strips (including all of the first conductive strips and the second conductive strips) are provided. Alternatively, the controller may be provided to a plurality of conductive strips at the same time, for example, the controller may be provided to all of the first conductive strips, all of the second conductive strips, or all of the conductive strips (including all of the first conductive strips and the second conductive strips) at the same time. In the best mode of the present invention, the driving signal of the active mode is limited to a predetermined frequency, which is different from the frequency of the driving signal of the passive mode. In the passive mode, the position of the external conductive object can be achieved by the self-capacitance detection or mutual capacitance detection.

In the present invention, the capacitance pen has a battery inside, which may be a dry battery or a storage battery, to provide the power required by the capacitance pen. In another example of the present invention, the capacitive stylus has an internal capacitor therein, which can temporarily store power and discharge the power to provide the capacitive stylus power. For example, the touch screen further includes a shielding conductive strip, in the passive mode, the shielding conductive strip is provided with a dc signal to shield the conductive strip from external noise, and in the active mode, the shielding conductive strip is provided with an ac signal, and the shielding conductive strip forms a first coil to generate an electromagnetic signal when the ac signal is provided. As shown in fig. 4C, the shielding conductive strip may surround all of the first conductive strips, all of the second conductive strips, or all of the conductive strips (including all of the first conductive strips and the second conductive strips). In the present invention, the driving signal received by the capacitive stylus is an electromagnetic signal generated by the first coil, and may be provided only by the first coil and not by the part or all of the conductive strips, or may be provided by the first coil and the part or all of the conductive strips simultaneously. It will be appreciated by those skilled in the art that the power received by the capacitive stylus may also be provided by other forms of external coil, such as one or more coils that do not surround the conductive strip. In an exemplary embodiment of the invention, the capacitive stylus further includes a second coil, and electromagnetic induction of electromagnetic signals of the second coil and the first coil provides power for the signal conversion circuit to generate the delay driving signal. In addition, the internal capacitor stores power generated by the second coil through electromagnetic induction.

From the foregoing description, it can be seen that the stylus of the present invention is particularly suitable for use with a cordless stylus.

Referring to fig. 5A to 5F, a writing method for ignoring hands according to a fourth embodiment of the invention is provided. As shown in fig. 5A, when the pen 52 is out of the detection range of the touch screen 51, the flag Fin is initially set to 0 (or false) or not set. When the pen 52 is within the detection range of the touch screen 51, as shown in fig. 5B, the flag Fin is set to 1 (or true). In the present example, when the flag Fin is set to 1, the controller provides only the position of the pen 52, disregards the position of the hand 53 holding the pen 52 or disregards the proximity and contact to the touch screen 51 other than the pen 52.

In the present example, when the flag Fin is set to 1, the controller will continuously determine and record the approach or contact of the hand 53 to the hand contact area 55 of the touch screen 51 by capacitive detection, as shown in fig. 5C and 5D. Such as by mutual capacitance detection, providing an image 56, and detecting an area 58 of the image 56 that is being approached or touched by the hand 53. In another example of the present invention, the area 58 that is approached or touched by the hand 53 can be contained in a predetermined range 59 (e.g., rectangular or polygonal) in a summary manner. When the pen 52 is a capacitive stylus, when the pen 52 approaches or contacts the touch screen 51 at the pen contact area 54, an area 57 approached or contacted by the pen 52 is also generated in the image. In yet another example of the present invention, the pen 52 may be an electromagnetic pen, and thus, the area 57 that is approached or contacted by the pen 52 is not generated in the image. The position of the electromagnetic pen is detected by an electromagnetic panel having a plurality of coils. In the following description, when the flag Fin is set to 1, the area 58 that is approached or touched by the hand 53 is recorded as a recording area or a recording image. It will be understood by those skilled in the art that the pen 52 may be an active capacitive pen or a passive capacitive pen, or other pens capable of being recognized by a touch screen, and the invention is not limited thereto.

When the flag Fin is set to 1, it is necessary that the pen 52 is not detected for more than a predetermined time, and the flag Fin is set to 0 again. In the present example, the recording area is an area 58 that is only detected and recorded within a distance from the pen touch area 54 that is being approached or touched by the hand 53. During writing, the pen 52 may be moved away or lifted to a position where it is not detected by the touch screen 51, and if the recording area still has the hand 53 approaching or touching, the flag Fin is still set to 1, as shown in fig. 5D. It is also possible that the hand 53 leaves the touch screen 51 but still detects that the pen 52 is still within the detection range of the touch screen 51, and the flag Fin is still set to 1, as shown in fig. 5E.

In other words, once the flag is set to 1, the flag is reset to 0 unless the pen 52 is no longer detected by the controller (not within the detection range of the touch screen 51) for a predetermined time, as shown in fig. 5F.

Therefore, the hand can achieve a hand neglect (Palm Rejection) mode in the writing process, and even if the pen leaves the surface of the touch screen due to writing, the pen is still in the hand neglect mode, and the position is not misinformed.

In light of the above, the present invention provides a method for detecting a touch screen, please refer to fig. 6. As shown in step 610, a signal of the proximity or touch of an external conductive object on the touch screen is provided. Then, as shown in step 620, when it is determined that at least one external conductive object is a pen according to the signal of the touch screen, the position of each pen is recorded, and the preset range of the position of each pen or the area touched or approached by another external conductive object outside the pen within the preset range is recorded. Also, as shown in step 630, flags corresponding to the position of each pen are provided, and each flag corresponds to a predetermined range of the corresponding pen position. In addition, as shown in step 640, the corresponding flag is set to true when the position of each pen is detected. Next, as shown in step 650, the flags are set to false values when the pen corresponding to each flag is not detected for a predetermined time. In addition, as shown in step 660, the position of each pen and the position of each external conductive object that is not within the predetermined range corresponding to each flag set to true are provided.

The steps 620 to 660 can be performed by the controller, and the flags can be stored in a memory for the controller to access. Accordingly, the present invention provides a detection device for a touch screen, which includes a touch screen, a controller and a memory. The signal for detecting the approach or touch of the external conductive object on the touch screen may be the touch screen, or may be an electromagnetic type, an infrared type, an Analog Matrix Resistance (AMR), a resistive type, an optical type, a surface acoustic wave type, or the like. The touch screen is not limited to a single type, and may be a composite of two types. Such as an electromagnetic detection pen, which detects two types of complex forms of hand by capacitance. Or a resistance type detection pen, which detects the composite form of two types of hands by capacitance type. Therefore, any touch panel that can distinguish between a pen and a hand can be applied to this embodiment. For example, a single type of touch screen, such as capacitive or analog matrix resistive, is used to detect whether the pen or hand is detected based on the detected proximity or touch area of the external conductive object.

The controller adds a flag of the position of the pen when detecting the position of the pen without the corresponding flag. The flag may be deleted when set as a dummy value, or may be deleted after being set as a dummy value for a certain period of time, or may be deleted at intervals of time. The controller provides the position of each pen and the position of each external conductive object that is not within the predetermined range corresponding to each flag set to true.

Since the pen may be off the touch screen surface during writing, the controller may not detect the pen, and the flag corresponding to the pen off the touch screen surface remains within the latest predetermined range. In other words, the corresponding predetermined range of the flag moves with the movement of the corresponding pen position, and when the pen is not detected (absent), the flag is maintained in the latest predetermined range.

In the best mode of the invention, only one pen is limited, so that the invention can be applied to most systems and touch screens, and the application range is the widest. When the pen has only one and the predetermined range is the whole touch screen, the flag of the pen is set to true value, only the position of the pen is provided, and the positions of other external conductive objects except the pen are not provided. Of course, as in the previous example, the predetermined range is slightly larger than the palm size, and the pen flag is set to true, which is the position of the pen and the position of each external conductive object that is not within the predetermined range.

In addition, the controller can track the position of each external conductive object, which can be determined according to the history track of each external conductive object, or the external conductive object can be determined as the same external conductive object if the external conductive object leaves the touch screen and then returns to the touch screen, and the last position before the external conductive object leaves and the position after the external conductive object returns are within the range defined in advance, and the external conductive object still corresponds to the original flag as long as the original flag is still true.

Referring to fig. 7, another detection method of a touch screen is provided in the present invention. First of all. As shown in step 710, a signal of the proximity or touch of an external conductive object on the touch screen is provided. Then, in step 720, it is determined whether each external conductive object is a pen according to the touch screen signal. Also, as shown in step 730, flags corresponding to the position of each pen are provided. In addition, as shown in step 740, the corresponding flag is set to true when the position of each pen is detected. Next, as shown in step 750, the flags are set to false values when the pen corresponding to each flag is not detected for a predetermined time. In addition, as shown in step 760, only the position of each pen is provided when at least one flag corresponding to the pen is set to true.

The steps 720 to 760 can be performed by the controller, and the flags can be stored in a memory for access by the controller. Accordingly, the present invention provides a detection device for a touch screen, which includes a touch screen, a controller and a memory. Other related contents are already described in the foregoing, and are not described herein again.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A touch processor connected to a touch panel, comprising:

when detecting that a pen approaches the touch panel but the hand holding the pen is not close to the touch panel, setting a preset area of the touch panel, wherein the preset area corresponds to the position of the pen to eliminate a proximity signal in the preset area, and the area of the preset area is smaller than that of the touch panel, and the proximity signal in the preset area is generated by the hand holding the pen;

when the pen is detected to leave the touch panel and the hand is close to the preset area, maintaining the preset area to continuously eliminate the close signal of the hand in the preset area; and

when the pen is detected to leave the touch panel for more than a preset time, the preset area is cancelled.

2. The touch processor of claim 1, wherein the predetermined area moves along a moving track of the hand position.

3. The touch processor of claim 1, wherein the predetermined area moves along a moving track corresponding to a position of the pen, and when it is detected that the pen leaves the touch panel for a predetermined time and the hand is still close to the predetermined area, a latest or earliest predetermined area is maintained to continuously exclude the hand close signal in the predetermined area.

4. The touch processor of claim 1, wherein the proximity signal of at least one external conductive object is output when the at least one external conductive object is proximate outside the predetermined region.

5. The touch processor of claim 1, further comprising the following steps when detecting that the pen is proximate to the touch panel:

detecting whether a preset area corresponding to the pen exists or not;

if the preset area corresponding to the pen exists, the preset area moves along with the position of the pen; and

if the preset area corresponding to the pen does not exist, the preset area is set.

6. The touch processor of claim 1, wherein when the predetermined area is the entire touch panel, only the proximity signal of the pen is output, and no proximity signal of an external conductive object other than the pen is output.

7. The touch processor of claim 1, wherein when at least one external conductive object approaches or touches the touch panel, the touch panel generates a signal corresponding to the approach or touch position of the external conductive object as the approach signal.

8. The touch processor of claim 1, wherein the hand position is within the predetermined area and the pen position is within the predetermined area or outside the predetermined area.

9. A touch method, comprising:

when detecting that a pen approaches a touch panel but a hand holding the pen is not close to the touch panel, setting a preset area of the touch panel, wherein the preset area corresponds to the position of the pen to eliminate a proximity signal in the preset area, and the area of the preset area is smaller than that of the touch panel, and the proximity signal in the preset area is generated by the hand holding the pen;

10. The touch method of claim 9, wherein the predetermined area moves along a moving track of the hand position.

11. The touch method of claim 9, wherein the predetermined area moves along a moving track of a position of the pen, and when it is detected that the pen leaves the touch panel for a predetermined time and the hand is still close to the predetermined area, a latest or earliest predetermined area is maintained to continuously exclude the hand close signal in the predetermined area.

12. The touch method of claim 9, wherein when at least one external conductive object approaches the predetermined region, a proximity signal of the at least one external conductive object is output.

13. The method of claim 9, further comprising the following steps when detecting that the pen is near the touch panel:

detecting whether a preset area corresponding to the pen exists or not;

14. The touch method of claim 9, wherein when the predetermined area is the entire touch panel, only the proximity signal of the pen is output, and no proximity signal of an external conductive object other than the pen is output.

15. The touch method of claim 9, wherein when at least one external conductive object approaches or touches the touch panel, the touch panel generates a signal corresponding to the approach or touch position of the external conductive object as the approach signal.

16. The touch method of claim 9, wherein the hand position is located within the predetermined area, and the pen position is located within the predetermined area or outside the predetermined area.