CN103995623B - Non-contact type touch screen control device - Google Patents

Abstract

The invention provides a non-contact touch screen control device, which belongs to the field of optoelectronics and is used to solve the problems that the existing non-contact touch screen control scheme is complicated to implement, has poor reliability and cannot perform non-contact operation on a long-distance large touch screen. The non-contact touch screen control device provided by the present invention includes: a hand-held light-emitting device that provides light beams in a first specified wavelength range; a touch screen film that is pasted on the surface of the touch capacitive screen to be controlled, from the surface of the touch capacitive screen to be controlled to the outside In the direction of the touch screen, the touch screen film sequentially includes a first transparent protective layer, a multi-point isolation layer, a photoelectric induction layer and a second transparent protective layer; when the photoelectric induction layer is irradiated by the light beam of the first specified wavelength range Breakdown occurs, and the irradiated part of the breakdown is in contact with the surface of the capacitive touch screen to be controlled through the multi-point isolation layer and the first transparent protective layer. The device has a simple structure, is not limited by the size of the touch screen and the external environment, and has high control reliability on the touch screen.

Description

A non-contact touch screen control device

technical field

The invention relates to the field of optoelectronics, in particular to a non-contact touch screen control device.

Background technique

In the past five years, smart phones have occupied the first place in the mobile communication terminal market. At the same time, in order to meet the diverse life and entertainment needs of consumers, various application software have emerged. While providing services, they also New requirements are put forward for the operation method of the mobile terminal, that is, the interaction between the user and the device. The traditional 12-key operation and the later full-keyboard equipment are far from being able to satisfy the operation functions provided by the various apps for users. At this time, the touch display technology emerges as the times require, and uses the simplest and most convenient way to enable consumers to complete operations. , to achieve an unprecedented human-computer interaction experience. This technology is also applied to various terminal devices such as tablet PCs, notebook computers, and large display screens, quickly occupying the market. It is the most natural input method. With the improvement of modern people's requirements for space saving and aesthetic and interactive human-machine display interface, the traditional mechanical button method has been gradually replaced by the touch screen.

According to the technical principles, touch screens can be roughly divided into five basic types: vector pressure sensing technology touch screens, resistive technology touch screens, capacitive technology touch screens, infrared technology touch screens, and surface acoustic wave technology touch screens. Among them, the early vector pressure sensing technology touch screen has withdrawn from the stage of history. Although the infrared touch screen is cheap, its outer frame is broken, which is prone to light interference and distortion in the case of a curved surface, so it is rarely used. The positioning of the resistive touch screen is accurate, but the price is quite high, and it is afraid of being scratched and easily damaged. The surface acoustic wave touch screen solves various defects of the previous touch screen. It is clear and anti-violence, and is suitable for various occasions. The defect is that water droplets and dust on the surface of the screen will make the touch screen dull or even unable to work. The design theory of capacitive touch screen is good. Although its image distortion problem needs to be improved, it is still one of the most widely used touch devices at this stage. The principle is to paste a layer of transparent metal capacitor on the glass surface. These special metal capacitors The substance is called a metal layer, and there are multiple touch positioning units on the metal layer. When a finger (conductor) touches the metal layer, the capacitance of the electric shock will change, so that the frequency of the oscillator connected to it will change, and the position information of the touch point can be determined by measuring the frequency change.

With the development of smart terminals, touch screens have become an indispensable display device. However, although touch screens are convenient to operate, they require complete finger touch operations, which often cannot meet the needs of use, especially in conferences and classrooms. Touch screen, which brings a lot of inconvenient constraints to the original smooth man-machine interactive operation. In addition to the restrictions on operation, full touch operation with bare hands is likely to cause some dirt and damage to the screen, and it is also not conducive to hygiene considerations. If there is a way to complete the operation of the touch screen under non-touch conditions and realize a good human-computer interaction function, it will be a great progress in the control operation of the intelligent terminal.

Although the existing touch screen technology is convenient to operate, it has certain restrictions, such as the need for our own fingers to fully touch it, which brings certain operational problems. For example, in the cold winter, what we often encounter is that hands with gloves cannot operate touch screen products. In addition, the hand touch method is difficult to be applied to a long-distance large-scale touch display screen. With the development of science and technology, touch screens have been widely used whether it is campus teaching, company conference presentations, or even our home LCD TVs, but most large touch screens are usually just Page turning and light point indication can not complete other complicated operations at all; at the same time, the distance and screen size limit make it impossible for us to perform manual operations in real time, which wastes good touch screen resources in vain, and at the same time Once the interaction of consumers in use is reduced, returning to the original non-touch display stage. In addition to operational limitations, full touch operation with bare hands is likely to cause some damage to the screen. The long-term existence of these oil stains and stains not only affects the display of the screen, but also has a great impact on the sensitivity of the operation. Many consumers Those who have found that the long-term use of the touch screen will produce unresponsive operation, or even the phenomenon of sliding screen, which greatly affects the smooth user experience brought by the smart terminal. However, in public places, some touch-screen devices are used by a large number of floating population, and bare-handed operation does not meet the considerations of sanitation and health and convenience. The practical and convenient touch-screen has become a way for the spread of diseases.

Therefore, there is a need for a non-contact touch screen control scheme, which can realize the control of the touch screen without touching the touch screen. Many scholars at home and abroad have proposed a variety of ideas and solutions to the above-mentioned related and similar problems, roughly as follows.

The first one, which is also the most concentrated and has the most users, is based on the idea of image processing. One or more cameras are placed at a designated position in front of the screen, and their angles and positions have relatively clear requirements, and then a short-term rapid collection of many operating images in front of the screen. The PC collects the image, compares it with the original image, and draws the operation conclusion through complex analysis algorithm, and instructs the display screen to operate. This idea is applied in different patents and papers, involving laser pointer pointer operations, gesture operations, and even some three-dimensional gesture operations. However, the disadvantage of this solution is that it has very high requirements on the environment, and it needs to set up an external camera device to connect with the touch screen display and PC, which is not universally applicable and portable, and the computer also needs to go through complex algorithms and image processing. Technical analysis is required to complete the above operations. A powerful database is needed to support the storage and analysis of images collected multiple times, so as to complete the analysis and comparison of images and ensure the accuracy of operation recognition. At the same time, the image collection requires certain considerations for the environment, light, operator clothing, etc. The situation is complex and inevitably produces recognition errors.

The second is to make a fuss about the screen itself, laying two capacitive layers with a certain gap between them, and the touch positioning units between the two capacitive layers are staggered. Because as the area of the touch unit on the metal layer of the capacitive screen itself increases, non-contact input can be realized, that is, the finger does not have to be in full contact with the screen, but when there is a certain distance, the increased touch positioning unit can be used. Capacitance change caused by the movement of the operating object is sensed. However, due to the increase in the area of the touch positioning unit, the number of touch units will decrease when the total area of the capacitive screen is fixed, which will further reduce the accuracy of the input. This scheme uses multi-layer capacitive layers to improve non-contact The position detection accuracy of the operation on contact. Although this solution effectively and conveniently realizes non-contact operation, it has certain restrictions on the distance of non-contact, and it is still powerless for the operation of large screens. It is not very meaningful for the human-computer interaction experience of non-contact operation screens.

Third, it is also a very popular solution at present, that is, eye control operation. When the eyeball is irradiated by the infrared beam, it will reflect the infrared spot on the cornea, and the infrared spot will form a horizontal and vertical angle difference with the center of the pupil, and the angle difference will change with the rotation of the eyeball. The built-in camera above the screen is a tiny detection device that reads the difference and compares it to a pre-stored benchmark for the separation angle of the eye-controlled focus points. Then, after a series of image processing, line of sight analysis, motion analysis, etc., the screen device is notified to complete the operation. This method seems novel and convenient, but because the daily movements of the eyes are too complicated, it is inevitable that additional operations will occur during the operation, such as blinking, turning the eyes to look elsewhere, etc. These inadvertent small movements will also be collected by the micro-detection device It can be seen that as an operational instruction, it will bring a lot of extra calculations, and at the same time, it will cause operational misjudgments. In addition, this method has a high degree of limitation. The screen must have a front camera or an external camera, and the eyes must be within the range that the detection device can capture. For small terminals such as mobile phones and tablet computers, the It can meet the requirements, but the operation cannot be realized for the large-scale display screen at a long distance.

To sum up, the existing touch screens have the problems that direct operation with hands is easy to cause certain damage to the touch screen, it is easy to infect diseases, and in many occasions, there are problems that the touch screen cannot be directly operated by hands, and the existing The solution of controlling the touch screen has the problems of complex implementation, poor reliability and the inability to perform non-contact operation on a long-distance large touch screen.

Contents of the invention

The present invention provides a non-contact touch screen control device, which is used to solve the problems that the existing touch screen is easy to cause certain damage to the touch screen when directly operated by hand, is easy to infect diseases, and cannot be directly used to operate the touch screen in many occasions, and The existing non-contact touch screen control scheme has the problems of complex implementation, poor reliability and inability to perform non-contact operation on long-distance large touch screens.

In order to solve the above technical problems, the present invention provides a non-contact touch screen control device, which includes: a hand-held light emitting device that provides light beams in the first specified wavelength range; a touch screen film that is pasted on the surface of the touch capacitive screen to be controlled, In the outward direction of the surface of the touch capacitive screen to be controlled, the touch screen film sequentially includes a first transparent protective layer, a multi-point isolation layer, a photoelectric sensing layer and a second transparent protective layer; When the light beam of the first specified wavelength range emitted by the handheld light-emitting device is irradiated, the irradiated part breaks down, and the irradiated part of the breakdown occurs through the multi-point isolation layer and the first transparent protective layer and the touch capacitance to be controlled. contact with the screen surface.

Preferably, the handheld lighting device includes a first beam generating transmitter, a power supply device, an MCU processor, a first switch, and a beam control unit; the power supply device is connected to all components in the handheld lighting device that require power and is Its power supply; the first switch and the light beam control unit are all connected to the MCU processor; the first switch is a fast rebound switch button, which is used to make the first switch of the MCU processor when it is in a pressed state A trigger terminal takes effect; the light beam control unit is used to enable the second trigger terminal of the MCU processor to take effect in the working state; the MCU processor controls the first trigger terminal or the second trigger terminal during the effective period A beam generation transmitter continuously generates the beam of the first designated wavelength range and emits it from a designated position; wherein, the priority of the MCU processor to respond to the effective state of the second trigger terminal is higher than that of the first trigger terminal. Status response priority.

Preferably, the beam control unit includes a beam splitting mirror group and a control block arranged in a chute; the beam splitting mirror group is arranged in the light emitting direction of the first beam generating emitter, and is used to divide the A beam of the first specified wavelength range emitted by the first beam generating transmitter is divided into two beams of the first specified wavelength range with a certain angle and emitted; the control block slides in the chute under the control of the user , when the control block is within the first specified range in the chute, the beam control unit is in a non-working state, and when the control block is within the second specified range in the chute, the beam control unit In the working state; the control block is also connected with the beam splitter group, and is used to drive the corresponding lenses of the beam splitter group to move when it moves within the second specified range in the chute, so as to adjust The included angle between the two beams of the first specified wavelength range output by the beam splitter mirror group.

Preferably, the handheld lighting device also includes a second switch connected to the MCU processor and a second light beam generating emitter; the second switch is used to trigger the third trigger of the MCU processor when the switch is closed. terminal takes effect; the MCU processor controls the second beam generation transmitter to continuously generate a beam of the second specified wavelength range and emit it from a specified position during the period when the third trigger terminal takes effect; the MCU processor controls the third trigger The priority of the response to the active state of the first trigger is lower than the priority of the response to the active state of the first trigger.

Preferably, when the control block moves within the second specified range in the chute, the included angle adjustment range of the two beams of the first specified wavelength range output by the beam splitter mirror group is from 0° to 100° .

Preferably, the second specified wavelength range is 650-660nm.

Preferably, the first specified wavelength range is 515-520nm.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

The non-contact touch screen control device provided by the present invention can realize the operation of the non-contact touch screen through the cooperation of the hand-held light-emitting device and the touch-screen film of special structure by controlling the light beam of a special wavelength through the hand-held light-emitting device, and realize the click on the touch screen , long press, multi-point operation, zoom in, zoom out and other controls, and realize the return function through the third switch, which completely restores the multi-finger operation of the touch screen mobile phone. This device does not need to change the structure of the original touch screen. For different devices, such as smart phones, tablet computers, large touch display screens, etc., just paste the touch screen film that matches the size of the touch screen surface on the touch screen surface, and you can use the handheld The non-contact touch operation of the light-emitting device has the advantages of a wide range of applications and is not limited by the size of the device itself and the external environment. Compared with the existing non-contact touch screen control scheme, there is no need to set up a camera device, and there is no need to store algorithms and image libraries. The operation is immediate, the structure is simple, and it has strong mobility, and the control reliability of the touch screen High, with good market prospects and practical application value.

Description of drawings

FIG. 1 is a schematic structural diagram of a non-contact touch screen control device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a preferred implementation of the handheld light emitting device in the non-contact touch screen control device provided by the present invention;

Fig. 3 is a schematic diagram of another preferred implementation of the handheld lighting device in the non-contact touch screen control device provided by the present invention;

Fig. 4 is a physical appearance diagram of a preferred implementation of the handheld lighting device shown in Fig. 3 .

[Description of Reference Signs]:

1. Hand-held lighting equipment;

2. Touch screen film;

3. Touch capacitive screen;

11. The first beam generating transmitter;

12. Power supply device;

13. MCU processor;

14. The first switch;

15. Beam control unit;

16. The second switch;

17. A second beam generating transmitter;

18. Chute;

19. Control block;

20. Light outlet;

21. The first transparent protective layer;

22. Multi-point isolation layer;

23. Photoelectric sensing layer;

24. The second transparent protective layer.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

In order to solve the problem that the existing non-contact touch screen control scheme in the prior art is complicated to implement, has poor reliability and cannot perform non-contact operation on a long-distance large touch screen, an embodiment of the present invention provides a non-contact touch screen control device, As shown in FIG. 1 , the device includes a hand-held lighting device 1 and a touch screen film 2 that are used in conjunction. Wherein, the hand-held light-emitting device 1 provides light beams in the first specified wavelength range; the touch screen film 2 is attached to the surface of the touch capacitive screen 3 to be controlled, and the touch screen film 2 It includes in sequence: a first transparent protective layer 21 , a multi-point isolation layer 22 , a photoelectric induction layer 23 and a second transparent protective layer 24 . Wherein, the second transparent protective layer 24 is directly in contact with the air, is a transparent protective layer, has high transparency, does not affect the display function, and prevents impurities in the air and solid objects from wearing and tearing the film core layer at the same time, which plays a very good role. Protective function. The multi-point isolation layer 22 separates some gaps between the photosensitive layer 23 and the touch capacitive screen 3 below. The first transparent protective layer 21 is used to protect the multi-point isolation layer 22 and prevent abrasion between it and the capacitive touch screen 3 . The photosensitive layer 23 is similar to a photosensitive sensor that can detect light in the first specified wavelength range. When it is irradiated by the light beam in the first specified wavelength range from the handheld light emitting device, the irradiated part breaks down, and the irradiated part of the breakdown passes through multiple points. The isolation layer 22 and the first transparent protective layer 21 are in contact with the touch positioning unit on the surface of the touch capacitive screen 3 to be controlled, then the capacitance of the touch capacitive screen 3 at the contact position changes, so that the vibration at the place connected to the touch capacitive screen 3 If the frequency of the sensor changes, the function of the touch capacitive screen 3 itself can obtain the position information of the touch point by measuring the change of the frequency. Since the working principle of the touch capacitive screen 3 is the prior art and not the focus of the present invention, it will not be repeated here.

Figure 2 is a schematic diagram of a preferred implementation of the handheld lighting device in the non-contact touch screen control device provided by the present invention, the handheld lighting device includes a first beam generating transmitter 11, a power supply device 12, an MCU processor 13, a first switch 14 and beam control unit 15. Wherein, the power supply device 11 is connected to and supplies power to all components in the handheld lighting device that require power. The first switch 14 and the light beam control unit 15 are all connected with the MCU processor 13; A trigger terminal takes effect; the light beam control unit 15 is used to enable the second trigger terminal of the MCU processor 13 to take effect in the working state; the MCU processor 13 controls the first beam generating emitter during the period when the first trigger terminal or the second trigger terminal takes effect 11 Continuously generate light beams in the first specified wavelength range and emit them from a specified position; wherein, the MCU processor 13 has a higher priority in responding to the valid state of the second trigger terminal than to the valid state of the first trigger terminal. For example, an existing MCU processor with at least two trigger terminals with different priorities can be selected for use, and then the first switch 14 is connected between the first trigger terminal of the MCU processor 13 and the high level circuit that can make it effective In this way, when the first switch 14 is pressed, the first trigger terminal of the MCU processor 13 can be connected to a high-level circuit that can make it take effect. When the first switch 14 pops up, the MCU processor 13 The high-level circuit connected to the first trigger end of the MCU processor 13 to enable it to take effect is disconnected, thereby realizing the control of the first switch 14 on the first trigger end of the MCU processor 13 . The control of the second trigger terminal of the MCU processor 13 by the light beam control unit 15 can be realized by using a similar principle.

It can be seen that, when the light beam control unit 15 of the hand-held light-emitting device shown in FIG. The user uses the hand-held light-emitting device to click on the touch capacitive screen under the touch screen film. And when the light beam control unit 15 is in the working state for a long time, the hand-held light-emitting device can continuously provide the light beam in the first specified wavelength range, so that the user can use the light beam to irradiate the touch screen film for a long time. Complete the long-time pressing function on the touch capacitive screen, or hold the hand-held light-emitting device to move the light beam in the first specified wavelength range on the touch screen film, and realize the linear sliding effect on the touch screen similar to that of a finger operating the touch screen.

Preferably, in order to realize an operation similar to two fingers simultaneously clicking on the screen to realize multi-touch, a function such as enlarging a picture or displaying a page is completed. The light beam control unit in the above-mentioned handheld lighting device provided by the embodiment of the present invention includes a beam splitter group and a control block arranged in a chute. The beam splitting mirror group is arranged on the light output direction of the first beam generating transmitter, and is used to divide a beam of the first specified wavelength range beam emitted by the first beam generating transmitter into two beams of the first specified wavelength with a certain angle Ranged beams are emitted. The control block slides in the chute under the control of the user. When the control block is within the first designated range in the chute, the beam control unit is in a non-working state, and when the control block is within the second designated range within the chute, the beam control unit is in the Working state; the control block is also connected with the beam splitter group, and is used to drive the corresponding lens movement of the beam splitter group when it moves within the second designated range in the chute, so as to adjust the output of the two beams of the beam splitter group. The included angle of a beam of light in a specified wavelength range. Thus, by adjusting the control block to slide back and forth within the second specified range in the chute, the beam divergence angle of the first specified wavelength range output by the handheld device can be changed from large to small or from small to large, that is, to achieve irradiation on the touch screen. The light spots on the film change from large to small or from small to large, so as to achieve the operation effect similar to the multi-touch operation of fingers on the touch screen. Preferably, when the control block moves within the second specified range in the chute, the included angle adjustment range of the two beams of the first specified wavelength range output by the beam splitter group is 0° to 100°.

Fig. 3 shows another preferred implementation structure schematic diagram of the hand-held light-emitting device in the non-contact touch-screen control device provided by the present invention, the hand-held light-emitting device in the non-contact touch-screen control device can also include a The second switch 16 and the second beam generating emitter 17. The second switch 16 is used to enable the third trigger terminal of the MCU processor 13 to take effect when the switch is closed; the MCU processor 13 controls the second beam generation transmitter 17 to continuously generate the beam of the second specified wavelength range during the period when the third trigger terminal is valid. And make it shoot out from the specified position; the MCU processor's response priority to the effective state of the third trigger terminal is lower than the response priority to the effective state of the first trigger terminal. Wherein, the touch screen film in the non-contact touch screen control device has no effect on the light beam in the second specified wavelength range, that is, the light beam in the second specified wavelength range irradiates the photoelectric sensor in the touch screen film 2 shown in FIG. When on the layer 23, the photosensitive layer 23 will not be broken down. At this time, the light beam in the second specified wavelength range only plays a function similar to the pointing screen of the existing laser pointer on the touch capacitive screen 3.

Preferably, the above-mentioned first specified wavelength range is the green light band of 515-520nm.

Preferably, the above-mentioned second specified wavelength range is 650-660nm, which is the red light band commonly used by existing laser pointers.

FIG. 4 is a physical appearance diagram of a preferred implementation of the handheld lighting device shown in FIG. 3 . In Fig. 4, the "POWER" button is the first switch 14, and the "ON/OFF" button is the second switch 16, and the light beam control unit includes a beam splitter group (not shown in Fig. 4, inside the device) and is arranged in a The control block 19 in the chute 18, the "Break" area shown on the lower side of the chute 18 is within the first specified range for the beam control unit to be in the non-working state, and the word "Hold" reaches the chute 18 in the figure The leftmost end is the second specified range for the beam control unit to be in the working state; the light outlet 20 in FIG. 4 is the light outlet of the first beam generation transmitter 11 and the second beam generation transmitter 17 . The first beam generating transmitter 11 , the power supply device 12 , the MCU processor 13 and the second beam generating transmitter 17 in FIG. 3 are arranged inside the device, so they are not shown in FIG. 4 .

The specific operation functions of the handheld light emitting device shown in Figure 4 are as follows:

1) Press the second switch "ON/OFF", the second switch is in the working state of the switch closed, at this time, if the control block 19 is in the "Break" position, and the first switch "POWER" button is not pressed, the MCU will process The third trigger terminal of the device 13 takes effect, and the MCU processor 13 controls the second light beam generation transmitter 17 to continuously generate the light beam of the second specified wavelength range (such as the red light beam of λ=650～660nm) and make the light beam pass through the light outlet 20 At this time, the handheld device is similar to an ordinary laser pointer, and only has the function of indicating the screen. The user can use the beam emitted by it to indicate the position on the touch screen.

2) When the user needs to complete the click operation on the touch capacitive screen 3, he only needs to lightly press the first switch "POWER" button. At this time, if the control block 19 is in the "Break" position, the first trigger of the MCU processor 13 The MCU processor 13 controls the first light beam generation transmitter 11 to continuously generate a light beam (such as a green light beam of λ=515-520nm) in the first specified wavelength range during the period when the "POWER" button is pressed, and makes the light beam Emit from the light outlet 20, and stop the first beam generating emitter 11 to generate a beam of the first specified wavelength range when the "POWER" button is quickly bounced back, thereby realizing the imitation effect of touching the touch capacitive screen 3 with a finger.

3) If you need to keep pressing the touch capacitive screen 3 for a long time, you can push the control block 19 to the "Hold" word of the chute 18 to the leftmost area to make the second trigger terminal of the MCU processor 13 take effect. At this time, the MCU processor 13 will control the first beam generating transmitter 11 to keep generating the beam of the first specified wavelength range. In the "Hold" position, the angle between the two beams of the first specified wavelength range emitted by the light outlet 20 is 0 degrees. , when the control block 19 is pushed to the left side of the chute 18 shown in the figure, the angle between the two beams of the first specified wavelength range emitted from the light outlet 20 will increase continuously, so that the angle between the two beams of emitted light can be changed. The corners are similar to two fingers clicking on the capacitive touch screen 3 at the same time, which helps realize multi-touch operations and complete functions such as zooming in on pictures or displaying pages. It can be seen that by pushing and pulling the control block 19 to control the angle of the light beam, the operation is very convenient and free.

The non-contact touch screen control device provided by the embodiment of the present invention can realize the operation of the non-contact touch screen through the cooperation of the hand-held light-emitting device and the touch-screen film of special structure by controlling the light beam of special wavelength through the hand-held light-emitting device, and realize the control of the touch screen. Click, long press, multi-point operation, zoom in, zoom out and other controls, and realize the return function through the third switch, which completely restores the multi-finger operation of the touch screen mobile phone. This device does not need to change the structure of the original touch screen. For different devices, such as smart phones, tablet computers, large touch display screens, etc., just paste the touch screen film that matches the size of the touch screen surface on the touch screen surface, and you can use the handheld The non-contact touch operation of the light-emitting device has the advantages of a wide range of applications and is not limited by the size of the device itself and the external environment. Compared with the existing non-contact touch screen control scheme, there is no need to set up a camera device, and there is no need to store algorithms and image libraries. The operation is immediate, the structure is simple, and it has strong mobility, and the control reliability of the touch screen High, with good market prospects and practical application value.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A non-contact touch screen control device, characterized in that, comprising: a hand-held light emitting device providing a beam of light in a first specified wavelength range; The touch screen film is pasted on the surface of the touch capacitive screen to be controlled, and in the direction outward from the surface of the touch capacitive screen to be controlled, the touch screen film successively includes a first transparent protective layer, a multi-point isolation layer, a photoelectric sensor layer and a second transparent protective layer; the photosensitive layer is punctured when irradiated by the light beam of the first specified wavelength range from the handheld light-emitting device, and the irradiated portion of the breakdown passes through the multi-point The isolation layer and the first transparent protective layer are in contact with the touch positioning unit on the surface of the touch capacitive screen to be controlled, and the capacitance of the touch capacitive screen at the contact position changes, so that the frequency of the oscillator connected to the touch capacitive screen changes, and the touch capacitive screen obtains the position information of the touch point by measuring the change of the frequency. 2. The non-contact touch screen control device according to claim 1, wherein the handheld light emitting device comprises a first light beam generating emitter, a power supply device, an MCU processor, a first switch and a light beam control unit; The power supply device is connected to and supplies power to all components in the handheld light emitting device that require power; Both the first switch and the light beam control unit are connected to the MCU processor; the first switch is a fast rebound switch button, which is used to make the first trigger terminal of the MCU processor Take effect; the light beam control unit is used to make the second trigger end of the MCU processor take effect in the working state; The MCU processor controls the first beam generation transmitter to continuously generate the beam of the first specified wavelength range and emit it from a specified position during the period when the first trigger terminal or the second trigger terminal is effective; wherein, the MCU The response priority of the processor to the valid state of the second trigger terminal is higher than that of the processor to the valid state of the first trigger terminal. 3. The non-contact touch screen control device according to claim 2, wherein the light beam control unit comprises a beam splitter group and a control block arranged in a chute; The beam splitting mirror group is arranged in the light emitting direction of the first beam generating emitter, and is used to divide a beam of a beam of a first specified wavelength range emitted by the first beam generating emitter into beams with a certain included angle. Two beams of light beams in the first specified wavelength range are emitted; The control block slides in the chute under the control of the user, and the beam control unit is in a non-working state when the control block is within a first specified range in the chute, and the control block is in the The light beam control unit is in the working state when within the second specified range in the chute; the control block is also connected to the beam splitter group for moving within the second specified range in the chute The corresponding lenses of the beam splitting mirror group are driven to move at the same time, so as to adjust the angle between the two beams of the first specified wavelength range output by the beam splitting mirror group. 4. The non-contact touch screen control device according to claim 3, wherein the handheld light emitting device further comprises a second switch connected to the MCU processor and a second light beam generating transmitter; The second switch is used to enable the third trigger terminal of the MCU processor to take effect when the switch is closed; the MCU processor controls the second beam generation transmitter to continuously generate the second designated The light beam in the wavelength range is emitted from a designated position; the priority of the response of the MCU processor to the valid state of the third trigger terminal is lower than that of the response priority to the valid state of the first trigger terminal. 5. The non-contact touch screen control device according to claim 3, wherein when the control block moves within the second specified range in the chute, the two beams output by the beam splitter mirror group The included angle adjustment range of the light beam in the first designated wavelength range is 0 degree to 100 degree. 6. The non-contact touch screen control device according to claim 4, characterized in that, the second specified wavelength range is 650-660 nm. 7. The non-contact touch screen control device according to any one of claims 1 to 5, wherein the first specified wavelength range is 515-520 nm.