TWI856643B - Touch sensing data scale conversion method, electronic chip and information processing device - Google Patents

Abstract

The present invention mainly discloses a scale transformation method of touch sensing data, which is performed by a touch chip and includes the following steps: receiving a first touch sensing data including M×N first sensing values from a touch panel, and determining a stretching direction according to the first touch sensing data and a predetermined physical size; and performing a scale transformation operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data including X×Y second sensing values. In short, when the method of the present invention is applied, the touch chip can adjust the horizontal and vertical ratio of the first touch sensing data to be equal to the physical ratio of the display screen. In this way, the touch chip can simultaneously divide the touch area of the touch panel to improve the accuracy of calculating the touch position coordinates of the finger according to the sensing value.

Description

Touch sensing data scale conversion method, electronic chip and information processing device

The present invention relates to the field of touch technology, and in particular to a method for scaling touch sensing data by scaling touch sensing data according to the physical size of a touch panel.

It is known that touch devices have been widely used in various electronic devices. FIG1 shows a block diagram of a known smart phone with touch function. As shown in FIG1, the smart phone 2a has a touch device 1a, and the touch device 1a mainly includes: A touch panel 11a, a readout circuit 12a and a data processing unit 13a, wherein the touch panel 11a includes a sensor array, and the sensor array includes M×N capacitance sensors. When the user's finger touches the glass cover of the smart phone 2a, the readout circuit 12a can read a touch sensing data containing M×N capacitance values from the M×N capacitance sensors. Finally, after performing relevant data processing on the touch sensing data, the data processing unit 13a can calculate the position coordinates of the user's finger, and then report the position coordinates to the host computer (such as the application processor or application software of a smart phone).

To explain in more detail, in actual applications, the horizontal and vertical ratio (or width-to-length ratio) of the touch panel 11a including M×N capacitance sensors is not necessarily equal to the physical ratio of the screen of the smart phone. Therefore, the prior art provides a scale conversion unit 131a in the data processing unit 13a to multiply the touch sensing data including M×N capacitance values by a scaling factor to convert it into touch sensing data including X×Y capacitance values, thereby making the horizontal and vertical ratio of the touch sensing data arranged in a matrix equal to the physical ratio of the screen of the smart phone. However, when the touch panel 11a is simultaneously divided into touch areas, the data scale conversion scheme adopted in the prior art will cause the touch sensing data to lose the accuracy of the position coordinates after being multiplied by the scaling factor.

From the above description, it can be seen that a new scale transformation method of touch sensing data is urgently needed in this field.

The main purpose of the present invention is to provide a scale conversion method for touch sensing data, which is performed by a touch chip. When the method of the present invention is applied, the touch chip can adjust the horizontal and vertical scales of the touch sensing data received from a touch panel to be equal to the physical scale of the display screen. In this way, the touch chip can simultaneously perform touch area division on the touch panel to improve the accuracy of calculating the touch position coordinates of the finger based on the sensing value.

To achieve the above-mentioned purpose, the present invention proposes an embodiment of the data scale conversion method, which is executed by an electronic chip used to form a touch device together with a touch panel, and includes the following steps: Receiving a first touch sensing data including M×N first sensing values from the touch panel, and determining a stretching direction according to the first touch sensing data and a predetermined physical size; wherein M and N are both positive integers; and Performing a scale conversion operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data including X×Y second sensing values; wherein X and Y are both positive integers.

In one embodiment, the touch panel and a display panel together form a touch display panel, and the predetermined physical size is a width-to-length ratio of a display area of the display panel, and the width-to-length ratio is Y:X.

In a feasible embodiment, the scale transformation operation includes the following steps: When the stretching direction is longitudinal, the least common multiple between X and M is calculated, and then a first coefficient and a second coefficient are calculated using the greatest common multiple, X and M; and A numerical adjustment operation is performed on the M×N first sensing values using the first coefficient and the second coefficient, thereby obtaining the X×Y second sensing values.

In one embodiment, the electronic chip uses the following mathematical formulas (1) and (2) to calculate the first coefficient and the second coefficient: ··········································(1); ······································· (2); wherein A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple between X and M.

In one embodiment, the electronic chip completes the numerical value adjustment operation by executing the following mathematical formulas (3), (4) and (5): ········································(3); ·······································(4); ······················· (5); wherein U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B; wherein, is the second sensing value at the mth row and nth column, is the first sensing value in the Uth row and the nth column, and is the first sensing value in the U-1th row and the nth column.

In another feasible embodiment, the scale transformation operation includes the following steps: When the stretching direction is horizontal, the least common multiple between Y and N is calculated, and then a first coefficient and a second coefficient are calculated using the greatest common multiple, Y and N; and A numerical adjustment operation is performed on the M×N first sensing values using the first coefficient and the second coefficient, thereby obtaining the X×Y second sensing values.

In one embodiment, the electronic chip uses the following mathematical formulas (i) and (ii) to calculate the first coefficient and the second coefficient: ···········································(i); ······································ (ii); wherein A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple between Y and N.

In one embodiment, the electronic chip performs the numerical value adjustment operation by executing the following mathematical formulas (iii), (iv) and (v): ······································· (iii); ·······································(iv); ······················ (v); wherein U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B; wherein, is the second sensing value of the mth row and nth column, is the first sensing value in the mth row and the Uth column, and is the first sensing value in the mth row and the U-1th column.

Furthermore, the present invention also discloses an electronic chip, which is used to form a touch device together with a touch panel; the electronic chip executes the touch sensing data scale conversion method of the present invention as described above, so as to convert a first touch sensing data including M×N first sensing values received from the touch panel into a second touch sensing data including X×Y second sensing values. In one embodiment, the electronic chip is any one selected from the group consisting of a touch chip and a touch and display driver integration (TDDI) chip.

Furthermore, the present invention discloses an information processing device, which is characterized by comprising a touch device, and the touch device includes a touch panel and at least one electronic chip of the present invention as described above. In one embodiment, the information processing device is any one selected from the group consisting of an electronic door lock with a touch function, a door machine with a touch function, an ATM with a touch function, a flat-panel display device, a smart TV, a smart phone, a tablet computer, an all-in-one computer, a laptop computer, an ATM, and an in-vehicle entertainment device.

In order to enable the Review Committee to further understand the structure, features, purpose, and advantages of the present invention, the following are attached with drawings and detailed descriptions of preferred specific embodiments.

Please refer to FIG. 2 , which is a block diagram of a touch device to which a scale transformation method of touch sensing data of the present invention is applied. As shown in FIG. 2 , the touch device 1 is integrated into an electronic device such as a smart phone, and mainly includes a touch panel 11 and an electronic chip 12, wherein the touch panel 11 and a display panel together form a touch display panel, and include a sensor array, and the sensor array includes M×N capacitive sensors. In addition, in a feasible embodiment, the electronic chip 12 can be a touch chip or a touch and display drive integration (TDDI) chip, and a scale transformation method of touch sensing data of the present invention is integrated into the electronic chip 12 in the form of a scale transformation unit 121. When the user's finger touches the glass cover of the smart phone, the electronic chip 12 reads a first touch sensing data including M×N first sensing values (i.e., capacitance values) from the M×N capacitance sensors. If the horizontal and vertical ratio (or width-to-length ratio) of the first touch sensing data (i.e., array data) is equal to the physical ratio of the screen of the smart phone, the electronic chip 12 then processes the first touch sensing data to calculate a position coordinate of the user's finger, and then reports the position coordinate to the host computer 2 (e.g., the application processor or application software of the smart phone).

If the horizontal and vertical ratios of the first touch sensing data are not equal to the physical ratio of the screen of the smart phone, the electronic chip 12 activates the scale conversion unit 121, thereby executing a scale conversion method of touch sensing data of the present invention to convert the first touch sensing data including M×N first sensing values into a second touch sensing data including X×Y second sensing values. FIG. 3 is a flow chart of a scale conversion method of touch sensing data of the present invention. As shown in FIG. 3, the method flow first executes step S1: receiving a first touch sensing data including M×N first sensing values from the touch panel 11, and determining a stretching direction according to the first touch sensing data and a predetermined physical size. Wherein, M and N are both positive integers, and the predetermined physical size is a width-to-length ratio of a display area of the display panel, for example, Y:X. Specifically, FIG. 4 is a diagram of first touch sensing data including 5×3 first sensing values. As shown in FIG. 4 , the horizontal and vertical ratio of the first touch sensing data is 3:5 (i.e., N:M). Therefore, if the physical ratio of the display screen is 3:6 (i.e., Y:X), it is necessary to vertically stretch the first touch sensing data.

Next, the method flow is to execute step S2: perform a scale transformation operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data including X×Y second sensing values; wherein X and Y are both positive integers. In a feasible embodiment, the scale transformation operation includes the following steps: when the stretching direction is the longitudinal direction, calculate the least common multiple between X and M, and then use the greatest common multiple, X and M to calculate a first coefficient and a second coefficient. The electronic chip 12 uses the following mathematical formulas (1) and (2) to complete the calculation of the first coefficient and the second coefficient: ·············································································(1) ·············································(2)

In the above formulas (1) and (2), A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple between X and M. Further, the scale transformation operation further includes the following step: using the first coefficient and the second coefficient to perform a numerical adjustment operation on the M×N first sensing values, thereby obtaining the X×Y second sensing values. Specifically, the electronic chip 12 completes the numerical adjustment operation by executing the following mathematical formulas (3), (4) and (5): ··········································(3) ·········································(4) ···························(5)

In the above equations (3), (4), and (5), U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B. In addition, is the second sensing value at the mth row and nth column, is the first sensing value in the Uth row and the nth column, and is the first sensing value of the U-1th row and the nth column. For example, the horizontal and vertical ratio of the first touch sensing data is 3:5 (i.e., N:M) and the physical ratio of the display screen is 3:6 (i.e., Y:X), then A=30/5 and B=30/6. Finally, the 5×3 first sensing values can be adjusted to the 6×3 second sensing values using the above formula (5). FIG5 is a diagram of the second touch sensing data including 6×3 second sensing values.

Furthermore, in another feasible embodiment, the scale transformation operation includes the following steps: when the stretching direction is horizontal, the least common multiple between Y and N is calculated, and then a first coefficient and a second coefficient are calculated using the greatest common multiple, Y and N. For example, the horizontal and vertical ratio of the first touch sensing data is 3:5 (i.e., N:M). Therefore, if the physical ratio of the display screen is 4:5 (i.e., Y:X), it is necessary to stretch the first touch sensing data horizontally. The electronic chip 12 uses the following mathematical formulas (i) and (ii) to complete the calculation of the first coefficient and the second coefficient: ··············································(i) ·············································(ii)

In the above formulas (i) and (ii), A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple between Y and N. Further, the scale transformation operation further includes the following steps: using the first coefficient and the second coefficient to perform a numerical adjustment operation on the M×N first sensing values, thereby obtaining the X×Y second sensing values. Specifically, the electronic chip 12 completes the numerical adjustment operation by executing the following mathematical formulas (iii), (iv) and (v): ·········································(iii) ········································(iv) ···························(v)

In the above formulas (iii), (iv), and (v), U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B. In addition, is the second sensing value at the mth row and nth column, is the first sensing value in the mth row and the Uth column, and is the first sensing value of the mth row and the U-1th column. For example, the horizontal and vertical ratio of the first touch sensing data is 3:5 (i.e., N:M) and the physical ratio of the display screen is 4:5 (i.e., Y:X), then A=30/3 and B=30/4. Finally, the 5×3 first sensing values can be adjusted to the 5×4 second sensing values using the above formula (v).

Thus, the above has completely and clearly described a touch sensing data scale transformation method of the present invention; and, from the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a method for scaling touch sensing data, which is performed by a touch chip. When the method of the present invention is applied, the touch chip can adjust the horizontal and vertical scales of the touch sensing data received from a touch panel to be equal to the physical scale of the display screen. In this way, the touch chip can simultaneously perform touch area division on the touch panel to improve the accuracy of calculating the touch position coordinates of the finger based on the sensing value.

(2) In addition, the present invention also discloses an electronic chip, which is used to form a touch device together with a touch panel; the electronic chip executes the touch sensing data scaling method of the present invention as described above to transform a first touch sensing data including M×N first sensing values received from the touch panel into a second touch sensing data including X×Y second sensing values. In one embodiment, the electronic chip is any one selected from the group consisting of a touch chip and a touch and display driver integration (TDDI) chip.

(3) Furthermore, the present invention discloses an information processing device, characterized in that it includes a touch device, and the touch device includes a touch panel and at least one electronic chip of the present invention as described above. In one embodiment, the information processing device is any one selected from the group consisting of an electronic door lock with a touch function, a door machine with a touch function, an ATM with a touch function, a flat-panel display device, a smart TV, a smart phone, a tablet computer, an all-in-one computer, a laptop computer, an ATM, and an in-vehicle entertainment device.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment. Any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by people familiar with the art do not deviate from the scope of the patent rights of this case.

In summary, this case shows that its purpose, means and effects are very different from the known technology, and it is the first invention that is practical and indeed meets the patent requirements for invention. We sincerely request the review committee to examine this carefully and grant a patent as soon as possible to benefit the society. This is our utmost prayer.

1a: Touch device 11a: Touch panel 12a: Readout circuit 13a: Data processing unit 131a: Scale conversion unit 2a: Smart phone 1: Touch device 11: Touch panel 12: Electronic chip 121: Scale conversion unit S1: Receive a first touch sensing data including M×N first sensing values from the touch panel, and determine a stretching direction according to the first touch sensing data and a predetermined physical size S2: Perform a scale conversion operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data including X×Y second sensing values

FIG. 1 is a block diagram of a known smart phone with a touch function; FIG. 2 is a block diagram of a touch device to which a scale transformation method of touch sensing data of the present invention is applied; FIG. 3 is a flow chart of a scale transformation method of touch sensing data of the present invention; FIG. 4 is a diagram of first touch sensing data including 5×3 first sensing values; and FIG. 5 is a diagram of second touch sensing data including 6×3 second sensing values.

S1: Receive a first touch sensing data including M×N first sensing values from the touch panel, and determine a stretching direction based on the first touch sensing data and a predetermined physical size

S2: Perform a scale transformation operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data containing X×Y second sensing values

Claims (7)

A scale transformation method for touch sensing data is performed by an electronic chip used to form a touch device together with a touch panel, and includes the following steps: receiving a first touch sensing data including M×N first sensing values from the touch panel, and determining a stretching direction according to the first touch sensing data and a predetermined physical size; wherein M and N are both positive integers; and performing a scale transformation operation on the first touch sensing data along the stretching direction, thereby obtaining a second touch sensing data including X×Y second sensing values. A second touch sensing data of a value; wherein X and Y are both positive integers; wherein the scale transformation operation comprises the following steps: when the stretching direction is the longitudinal direction, calculating the least common multiple between X and M, then calculating a first coefficient and a second coefficient using formulas (1) and (2); and performing a numerical adjustment operation on the M×N first sensing values using the first coefficient and the second coefficient, thereby obtaining the X×Y second sensing values, wherein the formulas (1) and (2) are expressed as follows:

Wherein, A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple. A method for scaling touch sensing data as described in claim 1, wherein the touch panel and a display panel together form a touch display panel, and the predetermined physical size is a width-to-length ratio of a display area of the display panel, and the width-to-length ratio is Y:X. The scale conversion method of touch sensing data as described in claim 1, wherein the electronic chip completes the numerical adjustment operation by executing the following mathematical equations (3), (4) and (5): U = mA / B ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． (3); V = mA % B ． ...

Wherein, U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B; wherein, DL _{m , n} is the second sensing value of the m th row and n th column, DR _{U , n} is the first sensing value of the U th row and n th column, and DR _{U -1, n} is the first sensing value of the U-1 th row and n th column. A scale transformation method for touch sensing data is performed by an electronic chip used to form a touch device together with a touch panel, and includes the following steps: receiving a first touch sensing data including M×N first sensing values from the touch panel, and determining a stretching direction according to the first touch sensing data and a predetermined physical size; wherein M and N are both positive integers; and performing a scale transformation operation on the first touch sensing data along the stretching direction, thereby obtaining a second sensing value including X×Y A second touch sensing data of; wherein X and Y are both positive integers; wherein the scale transformation operation comprises the following steps: when the stretching direction is the horizontal direction, calculating the least common multiple between Y and N, then calculating a first coefficient and a second coefficient using formulas (i) and (ii); and performing a numerical adjustment operation on the M×N first sensing values using the first coefficient and the second coefficient, thereby obtaining the X×Y second sensing values; wherein the formulas (i) and (ii) are expressed as follows:

Wherein, A is the first coefficient, B is the second coefficient, and Lcm is the least common multiple. The method for scaling touch sensing data as claimed in claim 4, wherein the electronic chip performs the numerical adjustment operation by executing the following mathematical formulas (iii), (iv) and (v): U = mA / B ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． (iii): V = mA % B ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． (iv);

Wherein, U is the quotient obtained by dividing mA by B, and V is the remainder obtained by dividing mA by B; wherein, DL _{m , n} is the second sensing value of the mth row and nth column, DR _{m , U} is the first sensing value of the mth row and Uth column, and DR _{m , U -1} is the first sensing value of the mth row and U-1th column. An electronic chip is used to form a touch device together with a touch panel; the electronic chip is characterized in that the electronic chip executes the touch sensing data scale conversion method described in any one of claim 1 to claim 5 to convert a first touch sensing data containing M×N first sensing values received from the touch panel into a second touch sensing data containing X×Y second sensing values. An information processing device, characterized in that it includes a touch device, and the touch device includes a touch panel and at least one electronic chip as described in claim 6.

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