TWI720605B - Method for recognizing the pressure of touch parts - Google Patents

Abstract

The present invention provides a method for recognizing the pressure of a touch element, including the following steps: determining whether a touch element generates a touch range on a touch interface, wherein the touch range includes a plurality of scanning points; calculating each scanning point in the touch range A sense of measurement and conversion into a touch energy volume; conversion of the touch energy volume to generate a pressure data; according to the pressure data to simulate different strokes; the present invention obtains the pressure data to output the thickness of the corresponding line without active The stylus can simulate the strokes of a pencil.

Description

Method for recognizing the pressure of touch parts

A method for recognizing the pressure of a touch element, especially refers to a method of simulating different strokes according to the pressure of the touch element in a touch panel.

As the technology of touch-sensitive mobile devices such as mobile phones and tablets is becoming more and more sophisticated, more and more people use products with touch-sensitive screens, except for devices with small screens such as mobile phones and tablets, to large sizes of 50 and 60 inches. The screens all have touch functions for added convenience. In the development process of touch panels, in addition to more and more humane functions, using touch panels as tools for writing and painting has also become an important development direction.

The touch panel can digitally store the writing, drawing, and sketching made on the panel. Whether it is storing text or drawing files or sending text or drawing files to other devices, it is more convenient than traditional paper records. But in order to have the experience of writing and drawing on paper like holding a pencil on the touch panel, you must use an active stylus or touch products, through the three-axis gyroscope or capacitor in the stylus The output and sensor components are connected and exchanged with the touch panel. When the inclination or pressure of the stylus changes, the changed information is actively transmitted to the touch panel. The processor of the touch panel calculates the corresponding result. Output the strokes the user wants. Therefore, in order to simulate the strokes of pencils and brushes on the existing touch panels, active touch products must be used, and the production cost of active touch products is higher, so the cost of use increases, and the touch controls must be paired in advance. Supplies and touch panels, and the touch panel must have high-intensity computing functions to provide real-time and precise strokes, not only the design The cost of the device has increased significantly, and the trouble level encountered by the user will also increase. Active touch products usually have a built-in battery to actively calculate the pressure level, and they also need to bear the cost of power consumption.

In order to reduce the cost burden of using touch products and increase the convenience of use, the present invention proposes a method for recognizing the pressure of a touch element. By calculating the pressure of the touch element and outputting corresponding thick and thin lines, the passive touch element can be used to experience the pencil's Brush strokes reduce the cost of use.

To achieve the above object, the present invention provides a method for identifying the pressure of a touch element, which is executed by a touch device having a touch interface and a touch element; the method includes: determining whether the touch interface generates a touch range, wherein The touch range includes a plurality of scanning points; a sensory measurement of each scanning point in the touch range is calculated and converted into a touch energy volume; the touch energy volume is converted to generate a pressure data; different strokes are simulated according to the pressure data .

The present invention can calculate the pressure exerted by the touch element on the touch interface, and convert it into a pen stroke such as a pencil to simulate the color depth of the line, which is more similar to the touch feeling of a simulated pencil.

The present invention further includes the following steps: calculating a position of a report point in the touch range; calculating a basic distance between each scanning point in the touch range and the position of the report point, and obtaining a maximum distance, wherein the maximum distance is the distance from the report point The distance between one of the farthest scan points of the point position and the reported point position; the inclination angle of the touch element is calculated according to the maximum distance; different strokes are simulated according to the inclination angle of the touch element and the pressure data.

The present invention uses the reported point position and the basic distance obtained in the touch range to calculate the maximum distance, and converts the maximum distance into the inclination angle of the touch element. The touch interface is based on The inclination angle outputs lines with different thicknesses. When the user operates the touch device through a touch device such as a finger or a passive stylus, he can simulate the use of a pencil on the touch device by adjusting the inclination angle of the touch device and the touch device. The feel of the operation, whether you are writing or sketching, you can experience the thick and thin strokes like pencil writing.

Furthermore, this project can be executed on the touch device by means of an application. The user can directly download the application of this project and operate on the touch device, and only need to use passive touch products to experience the writing touch of the pencil. There is no need to purchase additional equipment such as active capacitive pens, and there is no need to modify the original structure of the touch device, which is simple and versatile in use.

10: Touch interface

20, 20A, 20B: touch parts

30, 30A, 30B, 30C, 30D: touch range

31: Report position

32,32’: the farthest scan point

D1, D2, D3: Maximum distance

41~46: Touch energy volume

50, 51, 52, 53, 50A, 50B: wide pen range

Figure 1: A schematic diagram of the touch range corresponding to the touch element of the present invention.

Figure 2: A schematic diagram of the touch energy volume corresponding to each pressure value of the present invention.

Figure 3: A flowchart of the steps of the first preferred embodiment of the present invention.

Figure 4: A flowchart of the steps of the second preferred embodiment of the present invention.

Fig. 5: A schematic diagram of the maximum distance corresponding to each touch range of the present invention.

Fig. 6: A schematic diagram of the maximum distance corresponding to each inclination angle of the present invention.

Figures 7A-7C: schematic diagrams of line thickness corresponding to each inclination angle of the present invention.

Fig. 8: A schematic diagram of outputting wide pen strokes according to the direction angle of the present invention.

The present invention provides a method for recognizing the pressure of a touch element, which is executed by a touch device having a touch interface 10 and a touch element 20. In this case, by calculating the sensory measurement of each scanning point in the touch range where the touch element 20 is in contact with the touch interface 10, the pressure applied by the touch element 20 on the touch interface 10 is calculated. When the touch element 20 is used in the touch interface 10, When writing or drawing on the touch interface 10, make the touch interface 10 According to the pressure of the touch element 20, the thickness of the handwriting and the line can be converted, and the stroke of a pencil can be simulated when using passive products. The touch element can be 20 passive capacitive pens, fingers and other passive devices.

In the first preferred embodiment of the present invention, the method of detecting the pressure of the touch element 20 is used to further simulate the feel of a pencil.

Referring to FIG. 1, when the touch element 20 touches the touch interface 10, a touch range 30 formed by a plurality of scanning points is generated on the touch interface 10, and the touch interface 10 calculates the touch range A sense measurement of each scanning point within 30, and a touch energy volume calculated based on the sense measurement of each scanning point within the touch range 30. In the preferred embodiment, the touch energy volume is within the touch range The sum of the sensory measurements of these complex scan points in 30. Please further refer to FIG. 2, the touch interface 10 calculates the pressure applied by the touch element 20 according to the touch energy volume to generate a pressure data, wherein the touch energy volume is positively correlated with the pressure applied by the touch element 20. As shown in FIG. 2, for example, when the pressure applied by the touch element 20 is lighter, the touch energy volume 44 is lower; when the pressure applied by the touch element 20 is higher, the touch energy volume becomes larger , Make the touch energy volume 45 greater than the touch energy volume 44; when the pressure applied by the touch element 20 is greater, the touch energy volume is greater, so that the touch energy volume 46 is greater than the touch energy volume 45 .

In addition, in the step, the touch interface 10 uses the calculated pressure data to further correspond to output lines with darker or lighter colors. Wherein, the pressure applied by the touch element 20 is positively correlated with the color intensity of the output line. When the pressure applied by the touch element 20 is greater, the touch interface 10 outputs a darker line according to the pen pressure data; when the touch element 20 The smaller the applied pressure is, the lighter lines are output from the touch interface 10.

Referring to FIG. 3, based on the above description, the step flow of the first preferred embodiment of the present invention includes the following steps:

S101: Determine whether the touch interface 10 generates the touch range 30, wherein the touch range 30 includes a plurality of scanning points.

S102: Calculate the sensory measurement of each scanning point in the touch range 30 and convert it into the touch energy volume.

S103: Convert the touch energy volume to generate a pressure data.

S104: Simulate different strokes according to the pressure data.

Wherein, in step S101, when the touch element 20 touches the touch interface 10, the touch device determines that the touch area 30 is formed where the touch element 20 contacts the touch interface 10, wherein the touch Range 30 contains multiple sweep points. The touch interface 10 is preset with a preset threshold value. Generally speaking, in order to prevent false touches by fingers or other objects, the touch device first scans the scanning points on the touch interface 10 and determines the sensory measurement of each scanning point. When there are multiple scanning points, the sensory measurement is all When the predetermined threshold value is exceeded, the touch interface 10 generates a touch signal and determines that the touch range 30 is generated; when the sensory measurements of the scanning points are lower than the predetermined threshold value, the touch interface 10 The touch signal is not generated.

In step S102, the touch interface 10 calculates the sensory measurement of each scan point in the touch range 30, and converts it into the touch energy volume. Wherein, the sensory measurement may be the capacitance change caused by the touch element 20 contacting the touch interface 10.

In the second preferred embodiment of the present invention, different strokes can be further simulated according to the inclination angle of the touch element 20.

As shown in FIG. 1, when the touch element 20 touches the touch interface 10 at different angles, the shape of the touch area 30 will also change accordingly. For example, when the touch element 20A of FIG. 1 is perpendicular to the touch interface 10, the touch area 30A is approximately circular; when the touch element 20B and the touch interface 10 are at a non-perpendicular angle, the touch area 30B is approximately In the shape of an egg.

Please refer to FIG. 4 and FIG. 5, the method of the present invention further includes the following steps:

S201: Determine whether the touch interface 10 generates the touch range 30, wherein the touch range 30 includes a plurality of scanning points.

S202: Calculate the sensory measurement of each scanning point in the touch range 30 and convert it into the touch energy volume, and determine whether the touch energy volume exceeds an effective value.

S203: When the touch energy volume exceeds the effective value, calculate a point position 31 of the touch range 30.

S204: Calculate a basic distance between each scan point in the touch range 30 and the report point position 31, and obtain a maximum distance, where the maximum distance is one of the farthest scan points from the report point position 31 and the The distance between reporting points 31.

S205: Calculate the inclination angle of the touch element 20 according to the maximum distance.

S206: Simulate different strokes according to the inclination angle of the touch element 20.

In step S203, the touch interface 10 determines whether the generation of the touch range 30 is a normal operation of the user, or a malfunction caused by the user or other external forces accidentally touching. The method is that if the touch energy volume exceeds the effective value, the touch interface 10 determines that this is a valid operation, and calculates the report point position 31 of the touch range 30. Wherein, the report point position 31 is a point, which represents the actual position clicked on the touch interface 10; the report point position 31 is obtained from the plural scanning points through an algorithm calculation, for example, where the plural scanning points are densest It is calculated as the reporting point position 31, or the position of the scanning point with the largest sensing measurement in the touch range 30 is calculated as the reporting point position 31. Since the method of obtaining the reporting point position 31 belongs to the conventional technology, it will not be repeated here.

If the touch energy volume is lower than the effective value, the touch interface 10 determines that this is an invalid operation and does not operate, so as to ensure that the touch device will not operate due to accidental touch or noise.

In step S204, after confirming that it is a valid operation, the touch interface 10 further calculates the basic distance between each scanning point and the reporting point position 31. Since the touch range 30 is formed by a plurality of scanning points, the distance between each scanning point in the touch range 30 and the reporting point position 31 is different. The touch interface 10 then obtains the maximum distance according to the plural basic distances, where the maximum distance is determined by the The largest value in the basic distance is obtained, which represents the farthest distance between the farthest scanning point 32 and the reporting point position 31 in the touch range 30.

As shown in FIG. 5, the touch range 30 represents the state where the touch element 20 is perpendicular to the touch interface 10, so the touch range 30 is approximately circular, and the maximum distance D1 can be regarded as the radius of the circle; The touch range 30C represents the state where the touch element 20 is inclined to the touch interface 10, so the touch range 30C is approximately egg-shaped, and the maximum distance D2 is from the reporting point position 31 to the farthest scanning point 32; The touch range 30D represents the state where the touch element 20 is more inclined to the touch interface 10, and the maximum distance D3 is from the report point position 31 to the farthest scanning point 32'.

Referring to FIG. 6, in step S205, the touch interface 10 converts the inclination angle of the touch element 20 according to the maximum distance. The touch interface 10 stores a comparison list in advance. The comparison list includes a plurality of inclination angle data corresponding to different maximum distances, and each inclination angle data represents the angle between the touch element 20 and the horizontal plane of the touch interface 10. For example, as shown in FIG. 6, when the maximum distance D1 is 1 cm, the touch energy volume 41 is a normal value, which represents that the touch element 20 is perpendicular to the horizontal plane of the touch interface 10; when the maximum distance D2 is 1.5 cm, the touch energy volume 42 is greater than the touch energy volume 41, which represents that the touch element 20 is inclined at 45° to the horizontal plane of the touch interface 10; when the maximum distance D3 is 2 cm, the touch energy volume 43 is greater than the The touch energy volume 42 represents that the touch element 20 is inclined at 10° to the horizontal plane of the touch interface 10.

Referring to FIGS. 7A-7C, in step S206, the touch interface 10 outputs a wide pen range according to the continuously obtained plural inclination data, and the wide pen range represents lines of different thicknesses. For example, the inclination data is inversely proportional to the output line. When the value of the inclination data is smaller, it means that the angle between the touch element 20 and the horizontal plane of the touch interface 10 is smaller, the wide pen range is wider, and the output is The thicker the line is; the larger the value of the inclination data, the larger the angle between the touch element 20 and the horizontal plane of the touch interface 10, the narrower the wide pen range, and the thinner the output line. As shown in FIG. 7A, when the touch element 20 writes or draws in a manner perpendicular to the touch interface 10, the wide pen range 51 output by the touch interface 10 is larger. As shown in FIG. 7B, when the touch element 20 is inclined at 45° to the horizontal plane of the touch interface 10 to write or draw, the wide pen range 52 output by the touch interface 10 is relatively thick; FIG. 7C As shown, when the touch element 20 is operated at a 10° tilt to the horizontal plane of the touch interface 10, the wide pen range 53 output by the touch interface 10 is thicker, thereby simulating a stroke like a pencil.

In the third preferred embodiment of the present invention, the direction angle of the touch element 20 can be used to simulate the strokes of a pen similar to a highlight pen or a marker pen. Referring to FIG. 8, the touch interface 10 can detect the direction in which the report point 31 points to the farthest scanning point 32 to obtain a direction angle of the inclination of the touch element 20, and output a wide pen stroke according to the direction angle. A width direction of the wide brush stroke is parallel to the direction angle.

For the convenience of description, the direction of the touch interface 10 to the left and right of FIG. 8 is defined as the X-axis direction, and the direction of the touch interface 10 to the top and bottom of FIG. 7 is the Y-axis direction, and the direction angle is the included angle with the positive X-axis. . Taking the touch range 30 in the upper right corner as an example, the touch interface 10 detects that the direction from the reporting point 31 to the farthest scanning point 32 is facing the X-axis direction, and it is determined that the touch element 20 is 0° toward the X-axis Tilt and the direction angle is 0°. When the touch element 20 touches the touch interface 10 and moves up and down in the Y-axis direction, the touch interface 10 outputs a wide pen range 50 to simulate a pen stroke with a wide line like a microphone pen or a highlight pen.

Taking the touch range 30B in the lower right corner as an example, the touch interface 10 detects the reporting point 31 to the farthest scanning point 32 facing the X-axis direction of 315° (-45°), and determines the direction of the touch element 20 The X axis is inclined at 315° and the direction angle is 315° (-45°). When the touch element 20 contacts the touch interface 10 and moves back and forth toward the first and third quadrants of the XY coordinate axis, the touch interface 10 outputs the wide pen range 50A.

Take the following touch range 30E as an example. The touch interface 10 detects the position of the report point 31 to the farthest scanning point 32 facing the X axis 270° (-90°), and determines that the touch element 20 is in the X direction. The axis is inclined at 270° and the direction angle is 270° (-90°). When the touch element 20 contacts the touch interface 10 and moves left and right in the X-axis direction, the touch interface 10 outputs the wide pen range 50B.

The present invention outputs corresponding thick and thin lines by calculating the pressure and inclination angle of the touch element 20, and simulates as much as possible the pen method similar to the touch of a pencil, which can replace the high-cost active touch products. You can experience the strokes of a pencil with passive supplies. In addition, the present invention may further adopt a pressure detection method to calculate the pressure of the touch element 20 to output lines corresponding to the color depth, and further simulate the pen method similar to the touch of a pencil, and the experience effect is better.

Claims (8)

A method for recognizing the pressure of a touch element is executed by a touch device having a touch interface and a touch element. The method includes: determining whether the touch interface generates a touch range, wherein the touch range includes multiple scans Point; Calculate a sense measurement of each scanning point in the touch range and convert it into a touch energy volume; convert the touch energy volume to generate a pressure data; calculate the position of a reported point in the touch range; calculate the touch A basic distance between each scanning point in the range and the reporting point position, and obtaining a maximum distance, where the maximum distance is the distance between one of the farthest scanning points from the reporting point position and the reporting point position; The maximum distance calculates the inclination angle of the touch element; and simulates different strokes according to the inclination angle of the touch element and the pressure data. The method for recognizing the pressure of a touch element according to claim 1, wherein the touch energy volume is the sum of the sensory measurements of the plurality of scanning points in the touch range. A method for recognizing the pressure of a touch element is executed by a touch device having a touch interface and a touch element. The method includes: determining whether the touch interface generates a touch range, wherein the touch range includes multiple scans Point; Calculate a sense measurement of each scanning point in the touch range and convert it into a touch energy volume; convert the touch energy volume to generate a pressure data; determine whether the touch energy volume exceeds an effective value; when the If the volume of touch energy exceeds the effective value, calculate the position of a report point in the touch range; calculate a basic distance between each scan point in the touch range and the position of the report point, and obtain a maximum distance, where the maximum distance is the distance The distance between the farthest one of the farthest scanning point of the report point and the position of the report point; Calculate the inclination angle of the touch element according to the maximum distance; simulate different strokes according to the inclination angle of the touch element and the pressure data. According to the method for recognizing the pressure of a touch element as described in claim 3, the volume of touch energy is positively correlated with the pressure applied by the touch element. According to the method for identifying the pressure of a touch element in claim 3, if the touch energy volume is lower than the effective value, the touch interface is determined as an invalid operation, and the touch interface does not act. According to the method for recognizing the pressure of a touch element in claim 5, the touch interface pre-stores a comparison list, and the comparison list includes different inclination angle data corresponding to the maximum distance. According to the method for identifying the pressure of a touch element as described in claim 6, the maximum distance is positively correlated with the inclination angle of the touch element. According to the method for recognizing the pressure of a touch element as described in claim 6, the touch interface detects the direction in which the report point points to the farthest scanning point to obtain a direction angle of the touch element tilt, and outputs a wide pen according to the direction angle Brushstrokes.

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