Touch positioning method, medium and device

Abstract

The application discloses a touch positioning method, medium and device, and the method comprises the following steps: when a target emitting device is shielded by an object to be positioned, the emitting light intensity of the laser emitted by the target emitting device is acquired; the receiving light intensity of the laser reflected by the object to be positioned to a target receiving device is measured; the first distance from the target receiving device to the target emitting device is acquired; the first equation among the reflected light intensity, the second distance and the receiving light intensity is constructed; the second equation among the third distance, the reflected light intensity and the emitting light intensity is constructed; the third equation among the first distance, the second distance and the third distance is constructed; the first equation, the second equation and the third equation are solved to calculate the third distance; and the positioning position of the object to be positioned is obtained according to the position of the target emitting device and the third distance. The embodiment of the application can accurately calculate the positioning position of the object to be positioned.

Description

Technical Field

[0001] This invention relates to the field of electronic technology, and in particular to a touch positioning method, medium, and device. Background Technology

[0002] In the prior art, when using laser for touch positioning, a laser angle measuring device and a laser emitting device are respectively set on the touch panel, so that the laser emitting device emits laser towards the touch object. When the touch object reflects the laser, the incident angle of the reflected laser received by each of the multiple laser angle measuring devices is measured, and the multiple incident angles are calculated to obtain the positioning position of the touch object.

[0003] It is evident that in existing technologies, when using lasers for touch positioning, it is necessary to measure the incident angle of the reflected laser. Therefore, in order to accurately obtain the incident angle of the reflected laser, there are also requirements regarding the shape of the object being touched. This makes it difficult to locate objects with unknown shapes and also makes it impossible to accurately obtain the location of the object without measuring the angle. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a touch positioning method, medium, and device. By utilizing known emitted light intensity, received light intensity, and a first distance, and unknown reflected light intensity, a second distance, and a third distance, three equations are constructed. These equations are solved simultaneously to obtain the third distance. Based on the third distance and the position of the target transmitting device, the positioning position of the object to be positioned is obtained, thereby accurately calculating the positioning position of the object to be positioned.

[0005] To achieve the above objectives, embodiments of the present invention provide a touch positioning method applicable to touch screens. The touch screen includes a laser emitting device and a laser receiving device disposed on the same single-sided surface, wherein the direction in which the laser emitting device emits laser light is perpendicular to the single-sided surface of the touch screen. The touch positioning method includes:

[0006] When the object to be located blocks the laser emitted by any laser emitting device, the blocked laser emitting device is taken as the target emitting device, and the emitted light intensity of the laser emitted by the target emitting device is obtained;

[0007] Measure the received light intensity of the laser reflected from the object to be located to different laser receiving devices;

[0008] Select a target receiving device from among the laser receiving devices that have received the laser, and obtain a first distance between the target receiving device and the target transmitting device;

[0009] Construct a first equation relating the reflected light intensity of the laser light reflected from the object to be located to the target receiving device, the second distance from the object to be located to the target receiving device, and the received light intensity;

[0010] Construct a second equation relating the third distance from the object to be located to the target transmitting device, the reflected light intensity, and the emitted light intensity;

[0011] Construct a third process between the first distance, the second distance, and the third distance;

[0012] The third distance is calculated by simultaneously solving the first equation, the second equation, and the third equation.

[0013] The location of the object to be located is obtained based on the position of the target launching device and the third distance.

[0014] Furthermore, the touch screen includes multiple laser emitting devices and several laser receiving devices spaced apart on the same single side; lasers are emitted outward through all the laser emitting devices.

[0015] Furthermore, selecting a target receiving device from among the laser receiving devices that have received laser light includes: selecting the laser receiving device with the highest received light intensity from among the laser receiving devices that have received laser light as the target receiving device.

[0016] Furthermore, the first equation satisfies the condition that the reflected light intensity divided by the square of the second distance equals the received light intensity.

[0017] Furthermore, the second equation satisfies the condition that the emitted light intensity divided by the square of the third distance equals the reflected light intensity.

[0018] Furthermore, the third process satisfies the condition that the square of the first distance plus the square of the third distance equals the square of the second distance.

[0019] Furthermore, the laser receiving device is a phototube, and the laser emitting device is an infrared laser tube.

[0020] Furthermore, obtaining the location of the object to be located based on the position of the target transmitting device and the third distance includes: establishing a coordinate system with the side surface of the touch screen where the laser transmitting device and the laser receiving device are located as the zero point of the vertical coordinate axis and the leftmost side of the side surface of the touch screen as the zero point of the horizontal coordinate axis; obtaining the location of the object to be located by using the horizontal coordinate of the location of the target transmitting device as the horizontal coordinate of the object to be located and the third distance as the vertical coordinate of the object to be located.

[0021] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the touch positioning method as described in any of the preceding embodiments.

[0022] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executed by the processor, wherein the processor executes the program to implement the steps of the touch positioning method as described in any of the preceding embodiments.

[0023] The present invention has the following beneficial effects:

[0024] This invention, applicable to touchscreens, includes a laser emitting device and a laser receiving device disposed on the same single side, with the laser emitting device emitting laser light perpendicular to the single-side surface of the touchscreen. When an object to be located blocks the laser light emitted by any laser emitting device, the blocked laser emitting device is designated as the target emitting device, and the intensity of the emitted laser light is obtained. The intensity of the received laser light reflected from the object to be located to different laser receiving devices is measured. A target receiving device is selected from the laser receiving devices that have received the laser light, and the intensity of the laser light emitted by the target receiving device is obtained. The invention establishes a first distance for the device; constructs a first equation between the reflected light intensity of the laser light reflected from the object to be positioned to the target receiving device, a second distance from the object to be positioned to the target receiving device, and the received light intensity; constructs a third equation between the object to be positioned to the target transmitting device, the reflected light intensity, and the emitted light intensity; constructs a third equation between the first distance, the second distance, and the third distance; solves the first equation, the second equation, and the third equation simultaneously to calculate the second distance; and obtains the positioning position of the object to be positioned based on the position of the target transmitting device and the third distance. In this embodiment of the invention, when using laser for touch positioning, three equations are constructed using known emitted light intensity, received light intensity, and a first distance, and unknown reflected light intensity, second distance, and third distance. The third distance is obtained by solving the equations simultaneously, and the positioning position of the object to be positioned is obtained based on the third distance and the position of the target transmitting device. Therefore, the positioning position of the object to be positioned can be accurately calculated without measuring the incident angle of the reflected laser. Furthermore, this invention can complete the positioning of the object to be positioned without prior knowledge of its shape. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating an embodiment of a touch positioning method provided by the present invention;

[0026] Figure 2This is a schematic diagram of an embodiment of a touch positioning method provided by the present invention when the object to be positioned is not blocked by the laser.

[0027] Figure 3 This is a schematic diagram of an embodiment of a touch positioning method provided by the present invention when the object to be positioned is blocked by a laser.

[0028] Figure 4 This is a schematic diagram of the positional relationship of an embodiment of a touch positioning method provided by the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] See Figure 1 This is a flowchart illustrating an embodiment of the touch positioning method provided by the present invention. The method is applicable to touchscreens, which include a laser emitting device and a laser receiving device disposed on the same single-sided surface, wherein the direction in which the laser emitting device emits laser light is perpendicular to the single-sided surface of the touchscreen. The method includes steps S1 to S8, as follows:

[0031] Preferably, the touch screen includes multiple laser emitting devices and several laser receiving devices spaced apart on the same single side; lasers are emitted outward through all the laser emitting devices.

[0032] Specifically, such as Figure 2 As shown, the multiple black circles represented by label 1 are laser receiving devices, the multiple white circles represented by label 2 are laser emitting devices, and the black rectangle represented by label 3 is the laser emitted outward by the laser emitting device. The laser receiving devices and laser emitting devices are arranged alternately on the touch screen.

[0033] Preferably, the laser receiving device is a phototube, and the laser emitting device is an infrared laser tube.

[0034] S1, when the object to be located blocks the laser emitted by any laser emitting device, the blocked laser emitting device is taken as the target emitting device, and the emitted light intensity of the laser emitted by the target emitting device is obtained;

[0035] Specifically, it utilizes the narrow beam characteristics of lasers, especially infrared lasers, so that the object to be located can reflect the laser beam it blocks onto the laser receiving device.

[0036] Specifically, the emitted light intensity is the light intensity at the instant the laser is emitted from the target emitting device, and the magnitude of the emitted light intensity can be adjusted by setting the relevant parameters of the laser emitting device.

[0037] S2, Measure the received light intensity of the laser reflected from the object to be located to different laser receiving devices;

[0038] Specifically, such as Figure 3 As shown, the object to be located reflects the laser light it blocks onto different laser receiving devices. For each laser receiving device that receives the laser light, the intensity of the received laser light must be measured.

[0039] S3, Select a target receiving device from the laser receiving devices that have received the laser, and obtain the first distance between the target receiving device and the target transmitting device;

[0040] Preferably, selecting a target receiving device from the laser receiving devices that have received the laser includes: selecting the laser receiving device with the highest received light intensity from the laser receiving devices that have received the laser as the target receiving device.

[0041] For example, the farther the laser receiving device is from the object to be located, the weaker the laser light reflected onto it. Therefore, this target receiving device is the laser receiving device closest to the target transmitting device. Generally, laser receiving devices located on both sides of the target transmitting device receive the reflected laser light from the object to be located, and the measured intensity of the received light is the same (the distance from the target transmitting device is equal). Therefore, there will be two laser receiving devices with the same strongest light intensity, and either one can be chosen as the target receiving device. It is worth noting that in this embodiment, the laser receiving device with the strongest light intensity is selected as the target receiving device. In other embodiments, the receiving devices with the second, third, ... light intensities can also be selected as the target receiving device; no specific limitation is made here.

[0042] S4, construct a first equation relating the reflected light intensity of the laser light reflected from the object to be located to the target receiving device, the second distance from the object to be located to the target receiving device, and the received light intensity;

[0043] Specifically, when the surface of the object to be located blocks the laser, the laser is reflected in other directions in the form of light reflection, and the light intensity corresponding to the instant the laser is reflected from the surface of the object to be located is the reflected light intensity.

[0044] Preferably, the first equation satisfies the condition that the reflected light intensity divided by the square of the second distance equals the received light intensity.

[0045] Specifically, the expression for the first equation is as follows:

[0046]

[0047] Where C is the received light intensity, B is the reflected light intensity, and L2 is the second distance.

[0048] S5, construct a second equation relating the third distance from the object to be located to the target transmitting device, the reflected light intensity, and the emitted light intensity;

[0049] Preferably, the second equation satisfies the condition that the emitted light intensity divided by the square of the third distance equals the reflected light intensity.

[0050] Specifically, the expression for the second equation is as follows:

[0051]

[0052] Where B is the reflected light intensity, A is the emitted light intensity, and L3 is the third distance.

[0053] S6, construct a third process between the first distance, the second distance, and the third distance;

[0054] Preferably, the third distance satisfies the condition that the square of the first distance plus the square of the third distance equals the square of the second distance.

[0055] Specifically, the expression for the third-party program is as follows:

[0056]

[0057] Where L1 is the first distance, L2 is the second distance, and L3 is the third distance.

[0058] S7, Solve the first equation, the second equation, and the third equation simultaneously to calculate the third distance;

[0059] Specifically, the third distance is the vertical height distance between the object to be located and the plane where the touch screen is located. In this embodiment of the invention, after constructing the first equation, the second equation, and the third equation, since the emitted light intensity, received light intensity, and the first distance in the parameters are known parameters (i.e., they do not need to be calculated and can be directly measured or preset by the system, such as L1 being the distance between the laser receiving device and the laser emitting device), and the reflected light intensity, the second distance, and the third distance in the parameters are unknown parameters, under the premise of three equations and three unknowns, the three equations can be solved simultaneously to obtain the three unknown parameters.

[0060] Specifically, different laser receiving devices can be selected as target receiving devices, and then different third distances can be calculated accordingly. The average of all third distances can then be taken to obtain the final third distance, thereby reducing the impact of measurement errors and improving the positioning accuracy of the object to be located.

[0061] In this embodiment of the invention, when the object to be located blocks the laser emitted by any laser emitting device, the object will reflect the laser light illuminating it. This reflected laser light will then be received by multiple laser receiving devices, and a target receiving device will be selected from among these devices. (See reference...) Figure 4 , Figure 4 In this diagram, A represents the emitted light intensity of the target transmitting device, B represents the reflected light intensity of the object to be located, C represents the received light intensity of the target receiving device, D represents the first distance, L1 represents the third distance, and L2 represents the second distance.

[0062] S8, the positioning position of the object to be located is obtained based on the position of the target launching device and the third distance.

[0063] Preferably, obtaining the location of the object to be located based on the position of the target transmitting device and the third distance includes: establishing a coordinate system with the side surface of the touch screen where the laser transmitting device and laser receiving device are located as the zero point of the vertical coordinate axis and the leftmost side of the side surface of the touch screen as the zero point of the horizontal coordinate axis; obtaining the location of the object to be located by using the horizontal coordinate of the location of the target transmitting device as the horizontal coordinate of the object to be located and the third distance as the vertical coordinate of the object to be located. Since the coordinate axes are fixed and the location of the target transmitting device is fixed, the horizontal coordinate of the location of the target transmitting device is known.

[0064] Compared to existing technologies, the touch positioning method disclosed in this invention, when using laser for touch positioning, constructs three equations using known emitted light intensity, received light intensity, and a first distance, and unknown reflected light intensity, a second distance, and a third distance. Solving these equations simultaneously yields the third distance among the three unknowns. Based on the third distance and the position of the target transmitting device, the positioning position of the object to be positioned is obtained. Therefore, the positioning position of the object to be positioned can be accurately calculated without measuring the incident angle of the reflected laser. Furthermore, this invention can complete the positioning of the object to be positioned without prior knowledge of its shape.

[0065] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the touch positioning method as described in any of the preceding embodiments.

[0066] This invention also provides a computer device, including: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a touch positioning method program. When the processor executes the computer program, it implements the steps described in the various touch positioning method embodiments above, for example... Figure 1 Steps S1 to S8 are shown.

[0067] For example, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the computer device.

[0068] The computer device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The computer device may include, but is not limited to, a processor and memory.

[0069] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting various parts of the computer device via various interfaces and lines.

[0070] The memory can be used to store the computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory and by calling data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0071] Wherein, if the modules / units integrated into the computer device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary hardware platforms, and of course, it can also be implemented entirely by hardware. Based on this understanding, all or part of the technical solution of the present invention that contributes to the background art can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

[0073] The present invention has the following beneficial effects:

[0074] This invention, applicable to touchscreens, includes a laser emitting device and a laser receiving device disposed on the same single side, with the laser emitting device emitting laser light perpendicular to the single-side surface of the touchscreen. When an object to be located blocks the laser light emitted by any laser emitting device, the blocked laser emitting device is designated as the target emitting device, and the intensity of the emitted laser light is obtained. The intensity of the received laser light reflected from the object to be located to different laser receiving devices is measured. A target receiving device is selected from the laser receiving devices that have received the laser light, and the intensity of the laser light emitted by the target receiving device is obtained. The invention establishes a first distance for the device; constructs a first equation between the reflected light intensity of the laser light reflected from the object to be positioned to the target receiving device, a second distance from the object to be positioned to the target receiving device, and the received light intensity; constructs a third equation between the object to be positioned to the target transmitting device, the reflected light intensity, and the emitted light intensity; constructs a third equation between the first distance, the second distance, and the third distance; solves the first equation, the second equation, and the third equation simultaneously to calculate the second distance; and obtains the positioning position of the object to be positioned based on the position of the target transmitting device and the third distance. In this embodiment of the invention, when using laser for touch positioning, three equations are constructed using known emitted light intensity, received light intensity, and a first distance, and unknown reflected light intensity, second distance, and third distance. The third distance is obtained by solving the equations simultaneously, and the positioning position of the object to be positioned is obtained based on the third distance and the position of the target transmitting device. Therefore, the positioning position of the object to be positioned can be accurately calculated without measuring the incident angle of the reflected laser. Furthermore, this invention can complete the positioning of the object to be positioned without prior knowledge of its shape.

[0075] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A touch positioning method, characterized in that, Applicable to a touch screen, the touch screen includes a laser emitting device and a laser receiving device disposed on the same single side, and the direction in which the laser emitting device emits laser light is perpendicular to the single side surface of the touch screen; then, the touch positioning method includes: When the object to be located blocks the laser emitted by any laser emitting device, the blocked laser emitting device is taken as the target emitting device, and the emitted light intensity of the laser emitted by the target emitting device is obtained; Measure the received light intensity of the laser reflected from the object to be located to different laser receiving devices; Select a target receiving device from among the laser receiving devices that have received the laser, and obtain the first distance between the target receiving device and the target transmitting device; Construct a first equation relating the reflected light intensity of the laser light reflected from the object to be located to the target receiving device, the second distance from the object to be located to the target receiving device, and the received light intensity; Construct a second equation relating the third distance from the object to be located to the target transmitting device, the reflected light intensity, and the emitted light intensity; Construct a third process between the first distance, the second distance, and the third distance; The third distance is calculated by simultaneously solving the first equation, the second equation, and the third equation; wherein, by selecting different laser receiving devices as target receiving devices, different initial third distances are calculated accordingly, and the third distance is obtained by taking the average of all the initial third distances; The location of the object to be located is obtained based on the position of the target launching device and the third distance.

2. The touch positioning method as described in claim 1, characterized in that, The touch screen includes multiple laser emitting devices and several laser receiving devices spaced apart on the same side; lasers are emitted outwards by all the laser emitting devices.

3. The touch positioning method as described in claim 1, characterized in that, Selecting a target receiving device from among the laser receiving devices that have received the laser includes: Select the laser receiving device with the highest received light intensity from the laser receiving devices that receive the laser as the target receiving device.

4. The touch positioning method as described in claim 1, characterized in that, The first equation satisfies the condition that the reflected light intensity divided by the square of the second distance equals the received light intensity.

5. The touch positioning method as described in claim 1, characterized in that, The second equation satisfies that the emitted light intensity divided by the square of the third distance equals the reflected light intensity.

6. The touch positioning method as described in claim 1, characterized in that, The third process satisfies the condition that the square of the first distance plus the square of the third distance equals the square of the second distance.

7. The touch positioning method as described in claim 1, characterized in that, The laser receiving device is a phototube, and the laser emitting device is an infrared laser tube.

8. The touch positioning method as described in claim 1, characterized in that, The step of obtaining the location of the object to be located based on the location of the target launching device and the third distance includes: A coordinate system is established with the side surface of the touch screen where the laser emitting device and the laser receiving device are located as the zero point of the vertical axis and the leftmost side of the side surface of the touch screen as the zero point of the horizontal axis. The location of the target object is obtained by using the x-coordinate of the target launching device as the x-coordinate of the object to be located and the third distance as the y-coordinate of the object to be located.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the touch positioning method as described in any one of claims 1 to 8.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executed by the processor, characterized in that, When the processor executes the program, it implements the touch positioning method as described in any one of claims 1 to 8.

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