CN111324240B - High-density scanning method and circuit for infrared touch frame, touch frame and electronic equipment - Google Patents
High-density scanning method and circuit for infrared touch frame, touch frame and electronic equipment Download PDFInfo
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- CN111324240B CN111324240B CN202010085454.9A CN202010085454A CN111324240B CN 111324240 B CN111324240 B CN 111324240B CN 202010085454 A CN202010085454 A CN 202010085454A CN 111324240 B CN111324240 B CN 111324240B
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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
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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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Abstract
The invention relates to an infrared touch technology, and particularly discloses a high-density scanning method, a circuit, a touch frame and electronic equipment for an infrared touch frame, wherein the method comprises the steps that a controller controls a transmitter of the infrared touch frame to sequentially send infrared signals to each corresponding group of receivers for scanning; the controller determines coordinates of the occlusion region. The high-density scanning method of the infrared touch frame can perform scanning with high precision and fast speed, and avoids the problem that the traditional scanning mode is long in time.
Description
Technical Field
The invention relates to an infrared touch technology, in particular to a high-density scanning method and circuit for an infrared touch frame, the touch frame and electronic equipment.
Background
Nowadays, the touch screen technology is widely applied, and the scanning method related to the touch screen is more and more important, and the scanning speed of the scanning method influences the identification precision of touch points on the touch screen to a great extent.
Generally, an infrared transmitting tube and an infrared receiving tube are closely arranged on a frame of the infrared pair tube touch screen, and a touch point is identified by scanning whether a shelter exists in the infrared pair tube. The existing scanning method mainly comprises global scanning and area scanning, wherein the global scanning is full lamp tube scanning, all pairs of lamp tubes are scanned at least one scanning angle in each scanning period, and the scanning process of one-time touch point identification is finished and is called as one scanning period; the transceiving of a pair of infrared tubes is called as the scanning of the pair of infrared tubes; if there are multiple pairs of infrared tubes, it is said that there are multiple scan angles.
However, in the traditional scanning method, in a touch screen with a large number of infrared geminate transistors, especially a large-size touch screen, the scanning time is too long, the more the lighting tubes are, the more the angles are, the longer the response time is, but the higher the recognition accuracy is, but the cost is also greatly improved. If the response time is required to be fast, the accuracy can only be degraded.
Disclosure of Invention
The invention aims to provide a high-density scanning method and circuit for an infrared touch frame, the touch frame and electronic equipment, and solves the problems of long scanning time, low precision, complex calculation and the like of the existing scanning method.
The invention provides a high-density scanning method of an infrared touch frame, which comprises the steps that a controller controls a transmitter of the infrared touch frame to sequentially send infrared signals to corresponding receivers for scanning; the controller determines coordinates of the occlusion region.
As a preferred scheme, the step of controlling the transmitter of the infrared touch frame to sequentially send the infrared signals to each corresponding group of receivers by the controller for scanning includes:
grouping receivers on the long edge of the infrared touch frame according to the sequence from left to right, wherein each group is provided with M receivers, and numbering the receivers;
the controller controls the long edge of the infrared touch frame to send infrared signals to each group of receivers to scan according to the sequence from left to right;
grouping receivers on the short edge of the infrared touch frame according to the sequence from top to bottom, wherein each group is provided with M receivers, and numbering the receivers;
and the controller controls the short edge of the infrared touch frame to send infrared signals to each group of receivers for scanning according to the sequence from top to bottom.
Preferably, the determining the coordinates of the occlusion region by the controller includes:
numbering the transmitters, acquiring the numbers and the numbers of the shielded long-edge transmitters and receivers, and determining a first shielded area according to the numbers and the numbers;
the controller calculates a first one-dimensional coordinate of the occluded area according to the first occluded area;
acquiring the numbers and the numbers of the shielded short-edge transmitter and the shielded short-edge receiver, and determining a second shielded area according to the numbers and the numbers;
the controller calculates a second one-dimensional coordinate of the occluded area according to the second occluded area;
the controller determines the coordinates of the occluded area according to the first one-dimensional coordinates and the second one-dimensional coordinates.
Preferably, the determining the first occluded area according to the number and the number includes:
comparing the number of the blocked long-side transmitters and receivers, taking the transmitters or receivers on one side with less number as vertexes, and forming a triangular first blocked area with the corresponding transmitters or receivers;
and comparing the number of the blocked short-side transmitters and receivers, taking the transmitters or receivers on one side with less number as vertexes, and forming a triangular second blocked area with the corresponding transmitters or receivers.
In match with the method, the invention provides a high-density scanning control circuit of an infrared touch frame on the other hand, which comprises an infrared transmitting circuit, a receiving circuit and a controller; the controller executes the infrared touch frame high-density scanning control method.
Preferably, the receiving circuit comprises a signal selector and receiving lamps which are arranged and connected in a matrix manner;
in which the receiver is divided into N1Row and Y1Columns;
the signal selector is used for selecting from Y1Middle selection of M1Number of columns, the number of signal selectors and the number of columns M1Same wherein M1Is a positive integer not less than 1; if M is1＝Y1The control circuit does not need to set a signal selector.
Matched with the method, the invention provides an infrared touch frame on one hand, which comprises the infrared touch frame high-density scanning control circuit;
wherein the controller comprises:
the control unit is used for controlling the transmitters of the infrared touch frames to sequentially send infrared signals to the corresponding receivers for scanning;
the acquisition unit is used for acquiring the serial numbers of the transmitter and the receiver of the shielded area when the control unit scans the shielded area;
and the calculating unit is used for calculating the coordinates of the first shielded area according to the serial numbers of the transmitter and the receiver.
In match with the method, the invention further provides electronic equipment comprising the infrared touch frame.
The invention has the following beneficial effects:
according to the scheme of the invention, the infrared signals sent by each group of receivers are scanned in sequence, so that a high-density scanning effect is achieved, the problem of long scanning time when the touch screen is too large and the used angle is too large can be avoided, the problem of complex calculation is also avoided, and the response time is ensured while the accuracy is improved by adopting the group scanning.
Drawings
FIG. 1 is a scanning flow chart of a high-density scanning method for an infrared touch frame according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a local optical network distribution of a high-density scanning method for an infrared touch frame according to a preferred embodiment of the present invention;
FIG. 3 is a flow chart of a method for determining coordinates in a high-density scanning method of an infrared touch frame according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of another local optical network distribution of the high-density scanning method for the infrared touch frame according to the preferred embodiment of the present invention;
fig. 5 is a schematic structural diagram of an infrared touch frame according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a high-density scanning method for an infrared touch frame, including a controller controlling transmitters of the infrared touch frame to sequentially transmit infrared signals to corresponding receivers for scanning; the controller determines coordinates of the occlusion region.
The preferred embodiment of the invention scans the infrared signals sent by each group of receivers in sequence, so that the effect of high-density scanning is achieved, the problem of long scanning time when the touch screen is too large and the used angles are too many can be avoided, the problem of complex calculation is also avoided, and the response time is ensured while the accuracy is improved by adopting the group scanning.
In a preferred embodiment of the present invention, the controlling, by the controller, the transmitter of the infrared touch frame to sequentially transmit the infrared signals to each corresponding group of receivers for scanning includes:
grouping receivers on the long edge of the infrared touch frame according to the sequence from left to right, wherein each group is provided with M receivers, and numbering the receivers;
the controller controls the long edge of the infrared touch frame to send infrared signals to each group of receivers to scan according to the sequence from left to right;
grouping receivers on the short edge of the infrared touch frame according to the sequence from top to bottom, wherein each group is provided with M receivers, and numbering the receivers;
and the controller controls the short edge of the infrared touch frame to send infrared signals to each group of receivers for scanning according to the sequence from top to bottom.
Specifically, M is a positive integer not less than 1, after receivers on the long side or the short side are grouped, infrared signals are sequentially sent to each group for scanning according to the sequence from left to right, and the receivers in the same group receive the infrared signals at the same time, so that touch frames which are very long and have a very large number of receivers can be divided into a plurality of groups for scanning, namely, the scanning time is shortened, and meanwhile, more light rays are scanned to a shielding object, so that the accuracy is higher, and the effect is faster.
Referring to fig. 3, in a preferred embodiment of the present invention, the determining the coordinates of the occlusion region by the controller includes:
numbering the transmitters, acquiring the numbers and the numbers of the shielded long-edge transmitters and receivers, and determining a first shielded area according to the numbers and the numbers;
the controller calculates a first one-dimensional coordinate of the occluded area according to the first occluded area;
acquiring the numbers and the numbers of the shielded short-edge transmitter and the shielded short-edge receiver, and determining a second shielded area according to the numbers and the numbers;
the controller calculates a second one-dimensional coordinate of the occluded area according to the second occluded area;
the controller determines the coordinates of the occluded area according to the first one-dimensional coordinates and the second one-dimensional coordinates.
Specifically, a first shielded area is determined by acquiring the number and the number of a certain side of emitter and receiver, and the first shielded area contains all shielded light rays, so that corresponding one-dimensional coordinates can be obtained only by calculating the area; in the prior art, a great number of occluded areas need to be determined, and a plurality of occluded areas need to be calculated so as to determine corresponding coordinates; therefore, calculation of the shielded area is saved by acquiring the number and the number of the transmitter and the receiver on a certain side, accurate results can be obtained only by screening one or more transmitters and receivers, response time is short, and the sensitivity of the touch frame is higher.
Referring to fig. 4, in the preferred embodiment of the present invention, determining the first occluded area according to the number and number includes:
comparing the number of the blocked long-side transmitters and receivers, taking the transmitters or receivers on one side with less number as vertexes, and forming a triangular first blocked area with the corresponding transmitters or receivers;
and comparing the number of the blocked short-side transmitters and receivers, taking the transmitters or receivers on one side with less number as vertexes, and forming a triangular second blocked area with the corresponding transmitters or receivers.
Specifically, the number of the transmitters and the receivers on the long side or the short side of the shielding light is obtained, the shielded area of the triangle is determined, the shielded area with the minimum number contains all the shielded light, the accuracy is guaranteed, the calculation is simpler, and the response is quicker.
In match with the above method, a preferred embodiment of the present invention provides a high-density scanning control circuit for an infrared touch frame, which includes an infrared transmitting circuit, a receiving circuit and a controller; the controller executes the infrared touch frame high-density scanning control method.
In a preferred embodiment of the present invention, the receiving circuit includes a signal selector and receiving lamps arranged in a matrix;
in which the receiver is divided into N1Row and Y1Columns;
the signal selector is used for selecting from Y1Middle selection of M1Number of columns, the number of signal selectors and the number of columns M1Same wherein M1Is a positive integer not less than 1; if M is1＝Y1The control circuit does not need to set a signal selector.
Referring to fig. 5, in accordance with the above method, another aspect of the present invention provides an infrared touch frame, which includes the infrared touch frame high-density scanning control circuit;
wherein the controller comprises:
the control unit is used for controlling the emitters of the infrared touch frames to sequentially send infrared signals to the corresponding receivers for scanning;
the acquisition unit is used for acquiring the serial numbers of the transmitter and the receiver of the shielded area when the control unit scans the shielded area;
and the calculating unit is used for calculating the coordinates of the first shielded area according to the serial numbers of the transmitter and the receiver.
In accordance with the foregoing method, a further aspect of the preferred embodiments of the present invention provides an electronic device, including the infrared touch frame described above.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. A high-density scanning method of an infrared touch frame is characterized by comprising the steps that a controller controls emitters of the infrared touch frame to sequentially send infrared signals to each corresponding group of receivers for scanning; the controller determines coordinates of an occlusion region;
the controller controls the transmitter of the infrared touch frame to sequentially send the infrared signals to each group of corresponding receivers for scanning, and the method comprises the following steps:
grouping receivers on the long edge of the infrared touch frame according to the sequence from left to right, wherein each group is provided with M receivers, and numbering the receivers;
the controller controls the long edge of the infrared touch frame to send infrared signals to each group of receivers to scan according to the sequence from left to right;
grouping receivers on the short edge of the infrared touch frame according to the sequence from top to bottom, wherein each group is provided with M receivers, and numbering the receivers;
the controller controls the short edge of the infrared touch frame to send infrared signals to each group of receivers to scan according to the sequence from top to bottom;
the controller determining coordinates of the occlusion region includes:
numbering the transmitters, acquiring the numbers and the numbers of the shielded long-edge transmitters and receivers, and determining a first shielded area according to the numbers and the numbers;
the controller calculates a first one-dimensional coordinate of the occluded area according to the first occluded area;
acquiring the numbers and the numbers of the shielded short-edge transmitter and the shielded short-edge receiver, and determining a second shielded area according to the numbers and the numbers;
the controller calculates a second one-dimensional coordinate of the occluded area according to the second occluded area;
the controller determines the coordinates of the shielded area according to the first one-dimensional coordinates and the second one-dimensional coordinates;
determining the first occluded area according to the number and the number comprises:
comparing the number of the blocked long-side transmitters and receivers, taking the transmitters or receivers on one side with less number as vertexes, and forming a triangular first blocked area with the corresponding transmitters or receivers;
and comparing the number of the blocked short-edge transmitters and receivers, taking the transmitters or receivers on one edge with the smaller number as vertexes, and forming a triangular second blocked area with the corresponding transmitters or receivers.
2. A high-density scanning control circuit of an infrared touch frame is characterized by comprising an infrared transmitting circuit, a receiving circuit and a controller; wherein the controller performs the infrared touch frame high density scanning control method of claim 1.
3. The infrared touch frame high density scanning control circuit of claim 2, wherein the receiving circuit comprises a signal selector and receiving lamps arranged in a matrix;
in which the receiver is divided into N1Row and Y1Columns;
the signal selector is used for selecting from Y1Middle selection M1Columns, the number of signal selectors and the number of columns M1Same wherein M1Is a positive integer not less than 1; if M is1＝Y1The control circuit does not need to set a signal selector.
4. An infrared touch frame, characterized by comprising the infrared touch frame high-density scanning control circuit of claim 2;
wherein the controller comprises:
the control unit is used for controlling the emitters of the infrared touch frames to sequentially send infrared signals to the corresponding receivers for scanning;
the acquisition unit is used for acquiring the serial numbers of the transmitter and the receiver of the shielded area when the control unit scans the shielded area;
and the calculating unit is used for calculating the coordinates of the first shielded area according to the serial numbers of the transmitter and the receiver.
5. An electronic device characterized by comprising the infrared touch frame of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085454.9A CN111324240B (en) | 2020-01-31 | 2020-01-31 | High-density scanning method and circuit for infrared touch frame, touch frame and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010085454.9A CN111324240B (en) | 2020-01-31 | 2020-01-31 | High-density scanning method and circuit for infrared touch frame, touch frame and electronic equipment |
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| CN111324240A CN111324240A (en) | 2020-06-23 |
| CN111324240B true CN111324240B (en) | 2022-06-03 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885567A (en) * | 2014-03-11 | 2014-06-25 | 青岛海信电器股份有限公司 | Method for rousing touch terminal and touch terminal |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885567A (en) * | 2014-03-11 | 2014-06-25 | 青岛海信电器股份有限公司 | Method for rousing touch terminal and touch terminal |
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