CN111078061B - Infrared touch screen, control method and system thereof - Google Patents
Infrared touch screen, control method and system thereof Download PDFInfo
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- CN111078061B CN111078061B CN201911225247.2A CN201911225247A CN111078061B CN 111078061 B CN111078061 B CN 111078061B CN 201911225247 A CN201911225247 A CN 201911225247A CN 111078061 B CN111078061 B CN 111078061B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 101
- 230000007246 mechanism Effects 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000005070 sampling Methods 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 17
- 230000000903 blocking effect Effects 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses an infrared touch screen, a control method and a control system thereof, wherein the control method comprises the following steps: a signal intensity detection step of detecting the signal intensity received by the infrared receiving tube in each infrared pair tube; an infrared touch screen state acquisition step of acquiring the state of the infrared touch screen according to the signal intensity detected in each signal intensity detection step; judging whether the touch screen is required to be driven and controlled according to whether the touch screen is in a shielded state or not; if the touch screen is in a shielded state, driving the touch screen to be unfolded when the touch screen needs to be unfolded; and if the touch screen is in the unfolding state, driving the touch screen to be folded when the touch screen needs to be folded. The infrared touch screen, the control method and the control system thereof can acquire the state of the touch screen and can further control the touch screen as required.
Description
Technical Field
The invention belongs to the technical field of touch screens, relates to an infrared touch screen, and particularly relates to a control method and a control system of the infrared touch screen.
Background
The infrared touch screen comprises an infrared transmitting and receiving sensing element arranged on the outer frame of the touch screen, an infrared detection network is formed on the surface of the screen, and any touch object can change the infrared rays on the contact points to realize the operation of the touch screen. The infrared touch screen is similar to the surface acoustic wave touch screen in implementation principle, and uses infrared transmitting and receiving sensing elements. The elements form an infrared detection network on the surface of the screen, and an object (such as a finger) in touch operation can change the infrared rays of the contact points and then be converted into the coordinate positions of touch control to realize the response of the operation. On an infrared touch screen, a circuit board device arranged on four sides of the screen is provided with infrared transmitting tubes and infrared receiving tubes, and an infrared matrix crossing horizontally and vertically is correspondingly formed.
In some application modes, such as the application in a drawing type whiteboard, the existing infrared touch screen cannot be used or the whiteboard is in a contracted hidden state or an expanded state, which brings inconvenience to intelligent control of the device.
In view of this, there is an urgent need to design a new infrared touch screen in order to overcome the above-mentioned drawbacks of the existing touch screen.
Disclosure of Invention
The invention provides an infrared touch screen, a control method and a control system thereof, which can acquire state data of the touch screen, including whether the touch screen is in a contracted hidden state or in an expanded use state.
In order to solve the technical problems, according to one aspect of the present invention, the following technical scheme is adopted:
a control method of an infrared touch screen, the control method comprising:
a signal intensity detection step of detecting the signal intensity received by the infrared receiving tube in each infrared pair tube;
an infrared touch screen state acquisition step of acquiring the state of the infrared touch screen according to the signal intensity detected in each signal intensity detection step; and
judging whether the touch screen is required to be driven and controlled according to whether the touch screen is in a shielded state or not; if the touch screen is in a shielded state, driving the touch screen to be unfolded when the touch screen needs to be unfolded; and if the touch screen is in the unfolding state, driving the touch screen to be folded when the touch screen needs to be folded.
As an embodiment of the present invention, the control method further includes: and a shielding judgment step, judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detection unit.
In the shielding judging step, if the signal intensity detected by the infrared receiving tube is smaller than a set first threshold value, judging that the corresponding infrared receiving tube is not shielded; if the signal intensity detected by the infrared receiving tube is larger than the set second threshold value, judging that the corresponding infrared pair tube is blocked.
As one embodiment of the present invention, the control method further includes a shielding boundary determining step of determining a shielding boundary according to the signal intensities detected in the signal intensity detecting steps, and if the difference in the signal intensities detected by the adjacent infrared receiving tubes is greater than a set third threshold, determining that the shielding boundary is located in a region corresponding to the adjacent infrared receiving tube.
As one embodiment of the present invention, the control method further includes a shutter movement determining step of determining a shutter movement direction according to the signal intensity change rule detected in each signal intensity detecting step;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared touch screen is judged to be gradually released from shielding towards the set second direction.
As one embodiment of the present invention, the infrared touch screen further includes an infrared screen and a cover, each infrared pair of tubes is disposed on the infrared screen, and the infrared screen is retractable in the cover.
In the step of determining the movement of the shielding object, if each signal intensity detecting unit detects that the signal intensity received by each infrared receiving tube in the set range is sequentially enhanced along the set first direction, the infrared screen is determined to shrink into the shielding object; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared screen is judged to be pulled away from the cover gradually.
As one embodiment of the present invention, the signal strength detecting step includes:
collecting analog signals received by an infrared receiving tube;
converting the received analog signal into a digital signal;
and converting the digital signal into a numerical value capable of representing the signal intensity for comparison in the shielding judgment step.
An infrared touch screen comprises an infrared touch screen body, a touch screen driving mechanism and an infrared touch screen coverage detection module;
the infrared touch screen coverage detection module is connected with the infrared touch screen body and used for acquiring the state of the infrared touch screen body;
the touch screen driving mechanism is connected with the infrared touch screen coverage detection module and is used for acquiring the state of the infrared touch screen body from the infrared touch screen coverage detection module and judging whether the infrared touch screen needs to be driven and controlled according to the state of the infrared touch screen body;
if the infrared touch screen body is in a shielded state, and the infrared touch screen body needs to be unfolded, the touch screen driving mechanism can drive the infrared touch screen body to be unfolded;
if the infrared touch screen body is in an unfolding state, and the infrared touch screen body needs to be folded, the touch screen driving mechanism can drive the infrared touch screen body to be folded.
A control system for an infrared touch screen, the control system comprising: the control circuit is respectively connected with the touch screen driving mechanism and the infrared touch screen coverage detection device;
the touch screen body comprises a plurality of infrared pair tubes, and each infrared pair tube comprises an infrared emission tube and an infrared receiving tube; the infrared touch screen coverage detection device is connected with the infrared touch screen and used for acquiring the state of the infrared touch screen; the infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is connected with a corresponding infrared receiving tube respectively and is used for detecting the signal intensity received by each infrared receiving tube;
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity;
the input end of the coverage detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the coverage detection circuit outputs signals representing shielding states.
The coverage detection circuit comprises a plurality of comparators, the non-inverting input end of each comparator is connected with the corresponding signal intensity detection circuit, the inverting input end of each comparator is connected with a set reference signal, and the output end of each comparator outputs a signal representing the shielding state of the corresponding infrared pair tube;
the input end of the control circuit is connected with the output end of the infrared touch screen coverage detection device, the output end of the control circuit is connected with the touch screen driving mechanism, and a control command for driving the infrared touch screen to act can be sent to the touch screen driving mechanism.
A control system for an infrared touch screen, the control system comprising: the touch screen driving mechanism and the infrared touch screen coverage detection module;
the infrared touch screen coverage detection module is connected with the infrared touch screen and used for acquiring the state of the infrared touch screen;
the touch screen driving mechanism is connected with the infrared touch screen coverage detection module and is used for acquiring the state of the infrared touch screen from the infrared touch screen coverage detection module and judging whether the infrared touch screen needs to be driven and controlled according to the state of the infrared touch screen;
if the infrared touch screen is in a shielded state, and the infrared touch screen needs to be unfolded, the touch screen driving mechanism can drive the infrared touch screen to be unfolded;
if the infrared touch screen is in an unfolding state, and the infrared touch screen needs to be folded, the touch screen driving mechanism can drive the infrared touch screen to be folded.
As one embodiment of the invention, the infrared touch screen comprises a plurality of infrared pair tubes, and each infrared pair tube comprises an infrared emission tube and an infrared receiving tube; the infrared touch screen coverage detection module comprises:
the signal intensity detection units are respectively connected with the corresponding infrared receiving tubes and are used for detecting the signal intensity received by each infrared receiving tube; and
the shielding judging unit is used for judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detecting unit; if the signal intensity detected by the infrared receiving tube is smaller than a set first threshold value, judging that the corresponding infrared pair tube is not shielded; if the signal intensity detected by the infrared receiving tube is larger than the set second threshold value, judging that the corresponding infrared pair tube is blocked.
As one embodiment of the present invention, the signal strength detecting unit includes a sampling circuit, an analog-to-digital conversion circuit, and a signal strength conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity for comparison by the shielding judgment unit;
the infrared touch screen coverage detection module further includes:
the shielding object boundary judgment unit is used for judging the shielding object boundary according to the signal intensity detected by each signal intensity detection unit, and judging that the shielding object boundary is positioned in the area corresponding to the adjacent infrared receiving tube if the signal intensity difference detected by the adjacent infrared receiving tube is larger than a set third threshold value;
the shielding object movement judging unit is used for judging the movement direction of the shielding object according to the change rule of the signal intensity detected by each signal intensity detecting unit; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, judging that the infrared touch screen releases shielding gradually towards the set second direction;
the infrared touch screen also comprises an infrared screen and a cover, each infrared pair of tubes is arranged on the infrared screen, and the infrared screen can be contracted in the cover;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, the shielding object movement judgment unit judges that the infrared screen is contracted into the cover;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened in sequence along the set second direction, the shielding object movement judgment unit judges that the infrared screen is pulled away from the cover gradually.
The invention has the beneficial effects that: the control method of the infrared touch screen can acquire the state data of the touch screen, including whether the touch screen is in a contracted hidden state or in an expanded use state, and can further control the touch screen according to the state.
Drawings
FIG. 1 is a flowchart of an infrared touch screen control method according to an embodiment of the invention.
FIG. 2 is a schematic diagram of an infrared touch screen blocked by a blocking object according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a principle that the intensity of a received signal of an infrared receiving tube is increased in a blocked state in an embodiment of the invention.
FIG. 4 is a schematic diagram illustrating an infrared touch screen control system according to an embodiment of the invention.
Fig. 5 is a schematic diagram illustrating an infrared touch screen coverage detection module according to an embodiment of the invention.
FIG. 6 is a schematic diagram illustrating a composition of a shielding determination unit according to an embodiment of the invention.
FIG. 7 is a schematic diagram illustrating a composition of a barrier boundary determining unit according to an embodiment of the invention.
Fig. 8 is a schematic diagram illustrating an infrared touch screen coverage detection device according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the claims of the invention.
The description of this section is intended to be illustrative of only a few exemplary embodiments and the invention is not to be limited in scope by the description of the embodiments. It is also within the scope of the description and claims of the invention to interchange some of the technical features of the embodiments with other technical features of the same or similar prior art.
The invention discloses a control method of an infrared touch screen, and FIG. 1 is a flow chart of the control method of the infrared touch screen in an embodiment of the invention; referring to fig. 1, in an embodiment of the present invention, the control method includes:
step S1, detecting the signal intensity received by an infrared receiving tube in each infrared pair tube;
step S2, acquiring the state of the infrared touch screen according to the signal intensity detected in the signal intensity detection steps; and
step S3, judging whether the touch screen needs to be driven and controlled according to whether the touch screen is in a shielded state; if the touch screen is in a shielded state, driving the touch screen to be unfolded when the touch screen needs to be unfolded; and if the touch screen is in the unfolding state, driving the touch screen to be folded when the touch screen needs to be folded.
In one embodiment, the step S1 of detecting signal strength includes: collecting analog signals received by an infrared receiving tube; converting the received analog signal into a digital signal; and converting the digital signal into a numerical value capable of representing the signal intensity for comparison in the shielding judgment step. In one embodiment, the signal strength detection step includes: the analog signals received by the infrared receiving tube are collected through the sampling circuit; the analog signals acquired by the acquisition circuit are converted into digital signals through an analog-to-digital conversion circuit; and converting the digital signal into a numerical value capable of representing the signal intensity through a signal intensity conversion circuit for comparison in the shielding judgment step.
In an embodiment of the present invention, each pair of infrared receiving tubes of the infrared pair of tubes receives an analog signal, the sampling circuit collects the analog signal received by the infrared receiving tubes, the analog-to-digital conversion circuit converts the analog signal collected by the collecting circuit into a digital signal, the signal strength conversion circuit converts the digital signal into a value (for example, 0 to 255, but may be other values) capable of representing the signal strength, and then in step S2, the judgment is performed according to the value of the 0 to 255 number. For example: the value of the number in the normal state is 100, and the value of the number in the covering state can reach 200, so that whether the infrared receiving tube in the corresponding area is blocked or not can be judged.
In an embodiment of the present invention, step S2 includes: and a shielding judgment step, judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detection unit. In one embodiment, if the signal intensity detected by the infrared receiving tube is smaller than a set first threshold value, judging that the corresponding infrared receiving tube is not shielded; if the signal intensity detected by the infrared receiving tube is larger than the set second threshold value, judging that the corresponding infrared pair tube is blocked.
In an embodiment of the present invention, step S2 includes a barrier boundary determining step, determining a barrier boundary according to the signal intensities detected in the signal intensity detecting steps, and if the difference between the signal intensities detected by the adjacent infrared receiving tubes is greater than a set third threshold, determining that the barrier boundary is located in a region corresponding to the adjacent infrared receiving tube.
In an embodiment of the present invention, step S2 includes a step of determining a movement direction of the obstruction according to a change rule of signal intensity detected in each signal intensity detection step; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared touch screen is judged to be gradually released from shielding towards the set second direction.
In an embodiment of the invention, the infrared touch screen further includes an infrared screen and a cover, each infrared pair of tubes is disposed on the infrared screen, and the infrared screen is retractable in the cover. In an embodiment, in the step of determining the movement of the shielding object, if each signal intensity detection unit detects that the signal intensities received by each infrared receiving tube in the set range are sequentially enhanced along the set first direction, it is determined that the infrared screen is contracted into the shielding object; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared screen is judged to be pulled away from the cover gradually.
FIG. 2 is a schematic diagram of an infrared touch screen being blocked by a blocking object according to an embodiment of the present invention; referring to fig. 2, in an embodiment of the present invention, the infrared touch screen further includes an infrared screen 10 and a cover 13, each infrared pair is disposed on the infrared screen 10, and the infrared screen 10 can be retracted within the cover 13. In an embodiment, if each signal intensity detecting unit 1 detects that the signal intensity received by each infrared receiving tube 12 in the set range is sequentially increased along the set first direction, the shelter movement judging unit 5 judges that the infrared screen is contracted into the cover; if each signal intensity detecting unit 1 detects that the signal intensity received by each infrared receiving tube 12 in the set range is sequentially weakened along the set second direction, the shelter movement judging unit 5 judges that the infrared screen is gradually pulled away from the cover.
FIG. 3 is a schematic diagram of the infrared receiving tube according to an embodiment of the present invention, in which the intensity of the received signal is increased in a blocked state; referring to fig. 3, when the infrared pair of tubes of the infrared screen 10 is blocked by the blocking object 13, the corresponding infrared receiving tube 12 can receive the light directly emitted by the infrared transmitting tube 11, and can receive the light reflected by the blocking object 13, so that the received signal is stronger. In an embodiment of the present invention, the first threshold and the second threshold are adjusted according to the flatness of the shielding object 13, so as to make the detection more accurate.
The invention discloses an infrared touch screen and a control system thereof, wherein the infrared touch screen comprises an infrared touch screen body and a control system, and the control system comprises a touch screen driving mechanism and an infrared touch screen coverage detection module; the infrared touch screen coverage detection module is connected with the infrared touch screen body and used for acquiring the state of the infrared touch screen body; the touch screen driving mechanism is connected with the infrared touch screen coverage detection module and is used for acquiring the state of the infrared touch screen body from the infrared touch screen coverage detection module and judging whether the infrared touch screen needs to be driven and controlled according to the state of the infrared touch screen body. If the infrared touch screen body is in a shielded state, and the infrared touch screen body needs to be unfolded, the touch screen driving mechanism can drive the infrared touch screen body to be unfolded; if the infrared touch screen body is in an unfolding state, and the infrared touch screen body needs to be folded, the touch screen driving mechanism can drive the infrared touch screen body to be folded.
FIG. 4 is a schematic diagram illustrating the components of an infrared touch screen control system according to an embodiment of the present invention; referring to fig. 4, the control system includes: the touch screen driving mechanism 1 and the infrared touch screen cover detection module 2. The infrared touch screen coverage detection module 2 is connected with the infrared touch screen 10 and is used for acquiring the state of the infrared touch screen 10; such as whether in an occluded or deployed state, the particular location to which deployment is to take place, etc.
The touch screen driving mechanism 1 is respectively connected with the infrared touch screen coverage detection module 2 and the infrared touch screen 10, and is used for acquiring the state of the infrared touch screen acquired from the infrared touch screen coverage detection module, and judging whether the infrared touch screen 10 needs to be driven and controlled according to the state of the infrared touch screen 10.
If the infrared touch screen 10 is in a shielded state, and the infrared touch screen 10 needs to be unfolded, the touch screen driving mechanism 1 drives the infrared touch screen 10 to be unfolded; if the infrared touch screen 10 is in the unfolded state, and the infrared touch screen 10 needs to be folded, the touch screen driving mechanism 1 drives the infrared touch screen 10 to be folded.
In an embodiment, the touch screen driving mechanism 1 may include a control circuit, where the control circuit is configured to obtain a state of the infrared touch screen from the infrared touch screen coverage detection device 2, and determine whether to drive and control the infrared touch screen 10 according to the state of the infrared touch screen 10; when control of the infrared touch screen 10 is required, a corresponding control command can be sent to the touch screen driving mechanism 1. In an embodiment, the control circuit is present separately from the touch screen drive mechanism 1.
FIG. 5 is a schematic diagram illustrating a composition of an infrared touch screen coverage detection module according to an embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating an infrared touch screen being blocked by a blocking object according to an embodiment of the present invention; referring to fig. 2 and 5, in an embodiment of the present invention, the infrared touch screen 10 includes a plurality of infrared pairs of tubes, each of which includes an infrared transmitting tube 11 and an infrared receiving tube 12; the infrared touch screen coverage detection module 2 comprises a plurality of signal intensity detection units 21 and a shielding judgment unit 22.
Each signal intensity detection unit 21 is connected to a corresponding infrared receiving tube 12, and is used for detecting the signal intensity received by each infrared receiving tube 12; the shielding judging unit 22 is used for judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detecting unit 21; if the signal intensity detected by the infrared receiving tube 12 is smaller than the set first threshold value, judging that the corresponding infrared pair tube is not shielded; if the signal intensity detected by the infrared receiving tube 12 is larger than the set second threshold value, the corresponding infrared pair tube is judged to be blocked.
FIG. 6 is a schematic diagram showing the constitution of a signal strength detecting unit according to an embodiment of the invention; referring to fig. 6, in an embodiment, the signal strength detecting unit 21 includes a sampling circuit 211, an analog-to-digital conversion circuit 212 and a signal strength conversion circuit 213; the sampling circuit 211 is used for collecting analog signals received by the infrared receiving tube 12; the analog-to-digital conversion circuit 212 is configured to convert the analog signal collected by the sampling circuit 211 into a digital signal; the signal strength conversion circuit 213 is configured to convert the digital signal into a value capable of representing the signal strength, for comparison by the occlusion determination unit 22. In one embodiment, the sampling circuit 211 may be part of the infrared receiver tube 12.
In one embodiment of the present invention, each pair of infrared receiving tubes 12 receives signals, the sampling circuit 211 collects analog signals received by the infrared receiving tubes, the analog-to-digital conversion circuit 212 is configured to convert the analog signals collected by the sampling circuit into digital signals, the signal strength conversion circuit 213 converts the digital signals into a value (0-255) capable of representing the signal strength, and then the shielding judgment unit 22 judges according to the magnitude of the 0-255 digits. For example: the value of the number in the normal state is 100, and the value of the number in the covering state can reach 200, so that whether the infrared receiving tube in the corresponding area is blocked or not can be judged.
FIG. 7 is a schematic diagram illustrating a composition of a shielding determination unit according to an embodiment of the invention; referring to fig. 7, in an embodiment of the invention, the input end of the shielding judging unit 22 is respectively connected to each signal intensity detecting unit 21, and the output end of the shielding judging unit 22 outputs a signal representing the shielding state of the infrared receiving tube. In an embodiment, the shielding judging unit 22 includes a plurality of first comparators 221, the non-inverting input end of each first comparator 221 is connected to a corresponding signal strength detecting unit 21 (specifically, a corresponding signal strength converting circuit 213), the inverting input end of each first comparator 221 is connected to a set reference signal, and the output end of each first comparator 221 outputs a signal representing the shielding state of the corresponding infrared pair tube.
With continued reference to fig. 5, in an embodiment of the present invention, the infrared touch screen coverage detection module 2 further includes a shielding boundary determining unit 23 configured to determine a shielding boundary according to the signal intensities detected by the signal intensity detecting units 21, and determine that the shielding boundary is located in a region corresponding to the adjacent infrared receiving tube if the difference of the signal intensities detected by the adjacent infrared receiving tube is greater than a set third threshold; in an embodiment of the present invention, the shielding boundary judging unit 23 judges that the shielding boundary is located between the adjacent infrared receiving tubes.
FIG. 8 is a schematic diagram illustrating the composition of a barrier boundary determining unit according to an embodiment of the invention; referring to fig. 8, in an embodiment, the barrier boundary determining unit 23 includes a plurality of second comparators 231, and the non-inverting input terminal and the inverting input terminal of each second comparator 231 are respectively connected to the output terminals of the two first comparators 221 for detecting whether the blocked states of the two adjacent infrared receiving tubes 12 are the same or not, and the output terminals of the second comparators 231 output signals indicating whether the blocked states of the two adjacent infrared receiving tubes 12 are the same or not.
With continued reference to fig. 5, in an embodiment of the present invention, the infrared touch screen coverage detection module 2 further includes a shutter movement determination unit 24 for determining a movement direction of the shutter according to the change rule of the signal intensity detected by each signal intensity detection unit 21. If the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared touch screen is judged to be gradually released from shielding towards the set second direction.
FIG. 3 is a schematic diagram of an infrared touch screen being blocked by a blocking object according to an embodiment of the present invention; referring to fig. 3, in an embodiment of the present invention, the infrared touch screen further includes a cover device 13, each infrared pair is disposed on the touch screen body, and the touch screen body 1 can be retracted in the cover device. In an embodiment of the present invention, if each signal strength detecting unit 21 detects that the signal strength received by each infrared receiving tube 12 in the set range is sequentially increased along the set first direction, the shelter movement judging unit 24 judges that the infrared screen is contracted into the covering device; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the shielding object movement judgment unit judges that the infrared screen is pulled away from the cover device step by step.
FIG. 4 is a schematic diagram of the principle that the intensity of the received signal of the infrared receiving tube becomes larger in a blocked state according to an embodiment of the present invention; referring to fig. 4, when the infrared pair of tubes of the touch screen body 1 is blocked by the blocking object 13, the corresponding infrared receiving tube 12 can receive the light directly emitted by the infrared emitting tube 11, and can receive the light reflected by the blocking object 13, so that the received signal is stronger. In an embodiment of the present invention, the first threshold and the second threshold are adjusted according to the flatness of the shielding object 13, so as to make the detection more accurate.
In summary, the infrared touch screen, the control method and the control system thereof can acquire the state data of the touch screen, including whether the touch screen is in a contracted hidden state or in an expanded use state, and can further control the touch screen according to the state as required.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The description and applications of the present invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternatives and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other assemblies, materials, and components, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (8)
1. A control method of an infrared touch screen, the control method comprising:
a signal intensity detection step of detecting the signal intensity received by the infrared receiving tube in each infrared pair tube;
an infrared touch screen state acquisition step of acquiring the state of the infrared touch screen according to the signal intensity detected in each signal intensity detection step; and
judging whether the touch screen is required to be driven and controlled according to whether the touch screen is in a shielded state or not; if the touch screen is in a shielded state, driving the touch screen to be unfolded when the touch screen needs to be unfolded; if the touch screen is in the unfolding state, driving the touch screen to be folded when the touch screen needs to be folded;
the infrared touch screen also comprises an infrared screen and a cover, each infrared pair of tubes is arranged on the infrared screen, and the infrared screen can be contracted in the cover;
the infrared touch screen state acquisition step comprises a shielding object movement judgment step, and if each signal intensity detection unit detects that the signal intensity received by each infrared receiving tube in the set range is sequentially enhanced along the set first direction, the infrared screen is judged to shrink into the shielding object; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared screen is judged to be pulled away from the cover gradually.
2. The control method of an infrared touch screen according to claim 1, wherein:
the control method further includes: a shielding judging step of judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detecting unit;
in the shielding judging step, if the signal intensity detected by the infrared receiving tube is smaller than a set first threshold value, judging that the corresponding infrared receiving tube is not shielded; if the signal intensity detected by the infrared receiving tube is larger than the set second threshold value, judging that the corresponding infrared pair tube is blocked.
3. The control method of an infrared touch screen according to claim 1, wherein:
the control method further includes:
a shielding object boundary judgment step of judging a shielding object boundary according to the signal intensity detected in each signal intensity detection step, and judging that the shielding object boundary is positioned in a region corresponding to the adjacent infrared receiving tube if the signal intensity difference detected by the adjacent infrared receiving tube is larger than a set third threshold value;
a shelter movement judging step of judging the movement direction of the shelter according to the change rule of the signal intensity detected by each signal intensity detecting step; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared touch screen is judged to be gradually released from shielding towards the set second direction.
4. The control method of an infrared touch screen according to claim 1, wherein:
the signal strength detection step includes:
collecting analog signals received by an infrared receiving tube;
converting the received analog signal into a digital signal;
and converting the digital signal into a numerical value capable of representing the signal intensity for comparison in the shielding judgment step.
5. The infrared touch screen is characterized by comprising an infrared touch screen body, a touch screen driving mechanism and an infrared touch screen coverage detection module;
the infrared touch screen coverage detection module is connected with the infrared touch screen body and used for acquiring the state of the infrared touch screen body;
the touch screen driving mechanism is connected with the infrared touch screen coverage detection module and is used for acquiring the state of the infrared touch screen body from the infrared touch screen coverage detection module and judging whether the infrared touch screen needs to be driven and controlled according to the state of the infrared touch screen body;
if the infrared touch screen body is in a shielded state, and the infrared touch screen body needs to be unfolded, the touch screen driving mechanism can drive the infrared touch screen body to be unfolded;
if the infrared touch screen body is in an unfolding state, and the infrared touch screen body needs to be folded, the touch screen driving mechanism can drive the infrared touch screen body to be folded;
the infrared touch screen also comprises an infrared screen and a cover, each infrared pair of tubes is arranged on the infrared screen, and the infrared screen can be contracted in the cover;
the infrared touch screen coverage detection module is also used for judging the movement of the shielding object, and if each signal intensity detection unit detects that the signal intensity received by each infrared receiving tube in the set range is sequentially enhanced along the set first direction, the infrared screen is judged to shrink into the shielding object; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared screen is judged to be pulled away from the cover gradually.
6. A control system for an infrared touch screen, the control system comprising: the touch screen driving mechanism and the infrared touch screen coverage detection module;
the infrared touch screen coverage detection module is connected with the infrared touch screen and used for acquiring the state of the infrared touch screen;
the touch screen driving mechanism is connected with the infrared touch screen coverage detection module and is used for acquiring the state of the infrared touch screen from the infrared touch screen coverage detection module and judging whether the infrared touch screen needs to be driven and controlled according to the state of the infrared touch screen;
if the infrared touch screen is in a shielded state, and the infrared touch screen needs to be unfolded, the touch screen driving mechanism can drive the infrared touch screen to be unfolded;
if the infrared touch screen is in an unfolding state, and the infrared touch screen needs to be folded, the touch screen driving mechanism can drive the infrared touch screen to be folded;
the infrared touch screen also comprises an infrared screen and a cover, each infrared pair of tubes is arranged on the infrared screen, and the infrared screen can be contracted in the cover;
the infrared touch screen coverage detection module is also used for judging the movement of the shielding object, and if each signal intensity detection unit detects that the signal intensity received by each infrared receiving tube in the set range is sequentially enhanced along the set first direction, the infrared screen is judged to shrink into the shielding object; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, the infrared screen is judged to be pulled away from the cover gradually.
7. The control system of an infrared touch screen as set forth in claim 6, wherein:
the infrared touch screen comprises a plurality of infrared pair tubes, and each infrared pair tube comprises an infrared emission tube and an infrared receiving tube; the infrared touch screen coverage detection module comprises:
the signal intensity detection units are respectively connected with the corresponding infrared receiving tubes and are used for detecting the signal intensity received by each infrared receiving tube; and
the shielding judging unit is used for judging whether the corresponding infrared pair tube is shielded or not according to the signal intensity detected by each signal intensity detecting unit; if the signal intensity detected by the infrared receiving tube is smaller than a set first threshold value, judging that the corresponding infrared pair tube is not shielded; if the signal intensity detected by the infrared receiving tube is larger than the set second threshold value, judging that the corresponding infrared pair tube is blocked.
8. The control system of an infrared touch screen of claim 7, wherein:
the signal intensity detection unit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity for comparison by the shielding judgment unit;
the infrared touch screen coverage detection module further includes:
the shielding object boundary judgment unit is used for judging the shielding object boundary according to the signal intensity detected by each signal intensity detection unit, and judging that the shielding object boundary is positioned in the area corresponding to the adjacent infrared receiving tube if the signal intensity difference detected by the adjacent infrared receiving tube is larger than a set third threshold value;
the shielding object movement judging unit is used for judging the movement direction of the shielding object according to the change rule of the signal intensity detected by each signal intensity detecting unit; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, judging that the infrared touch screen is gradually shielded towards the set first direction; if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened along the set second direction, judging that the infrared touch screen releases shielding gradually towards the set second direction;
the infrared touch screen also comprises an infrared screen and a cover, each infrared pair of tubes is arranged on the infrared screen, and the infrared screen can be contracted in the cover;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, the shielding object movement judgment unit judges that the infrared screen is contracted into the cover;
if the signal intensity detection units detect that the signal intensity received by the infrared receiving tubes in the set range is weakened in sequence along the set second direction, the shielding object movement judgment unit judges that the infrared screen is pulled away from the cover gradually.
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Address after: 313000 3 three or four floors of No. 769, seven Li Ting Road, Huzhou, Zhejiang Applicant after: Jiage Technology (Zhejiang) Co.,Ltd. Address before: 313000 3 three or four floors of No. 769, seven Li Ting Road, Huzhou, Zhejiang Applicant before: ZAAG TECH Inc. |
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Denomination of invention: Infrared touch screen, its control method and system Granted publication date: 20230822 Pledgee: South Taihu New Area sub branch of Huzhou Bank Co.,Ltd. Pledgor: Jiage Technology (Zhejiang) Co.,Ltd. Registration number: Y2024980022933 |