WO2012068933A1 - 一种红外触摸屏多点识别方法及一种红外触摸屏 - Google Patents
一种红外触摸屏多点识别方法及一种红外触摸屏 Download PDFInfo
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- WO2012068933A1 WO2012068933A1 PCT/CN2011/081006 CN2011081006W WO2012068933A1 WO 2012068933 A1 WO2012068933 A1 WO 2012068933A1 CN 2011081006 W CN2011081006 W CN 2011081006W WO 2012068933 A1 WO2012068933 A1 WO 2012068933A1
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- Prior art keywords
- touch point
- infrared
- axis
- touch
- calibration
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Classifications
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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
-
- 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
-
- 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
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
Definitions
- the invention belongs to the field of optoelectronic technology, and particularly relates to an infrared touch screen multi-point identification method and an infrared touch screen.
- the traditional multi-point recognition method of infrared touch screen mainly adopts the logic elimination method, including the partition method and the time division method.
- the time-sharing method assumes that the multi-touch operation is a time-sharing touch, and the operation interval takes several milliseconds.
- the second touch point operation produces a corresponding "Ghost" point, which is commonly referred to as "ghost point” in the country, and the real The second touch point is diagonal to the first touch point, so the "ghost point" can be eliminated by the time-sharing method.
- the partitioning method requires the entire touch screen to be physically divided into several areas. Each touch screen may have 2, 3, or 4 areas, and each area is positioned with a single touch operation to eliminate the "ghost point" generated when the touch point moves.
- the present invention provides an identification method for enabling an infrared touch screen to recognize a plurality of touch points by performing only one set of detecting elements to complete a full-screen scan, the infrared touch screen including an infrared transmitting tube and an infrared
- the receiving tube, the touch detection area and the processing unit the infrared light emitted by the infrared transmitting tube is received by the at least two infrared receiving tubes through the touch detection area, wherein the method comprises the following steps:
- the step of obtaining the first set of calibration touch points is to calculate a center of gravity of a boundary of the first calibration touch point obtained by the first direction off-axis scan.
- the step of acquiring the second set of calibration touch points is to calculate a center of gravity of a boundary of the second calibration touch point obtained by the second direction off-axis scan.
- the first direction off-axis is an off-axis that is at an angle opposite to the in-axis direction in a counterclockwise direction
- the second direction off-axis is an off-axis that is at an angle to the in-axis direction in a clockwise direction
- the first direction off-axis is an off-axis that is at an angle to the in-axis direction at a clockwise direction
- the second-direction off-axis is an off-axis that forms an angle with the in-axis direction in a counterclockwise direction.
- the angle between the off-axis of the first direction and the in-axis direction is the same as the angle between the off-axis of the second direction and the in-axis direction.
- determining a boundary of the quasi-touch point is reading at least one of in-axis scan data, in-axis and off-axis scan data, off-axis scan data of the infrared transmitting tube and the infrared receiving tube to obtain an accurate boundary of the touch point .
- the step of obtaining the set of quasi-touch points is to calculate the center of gravity of the boundary of the quasi-touch point.
- the steps to exclude ghost points and determine the actual touch points are:
- the quasi-touch point is a ghost point; and the sum of the distance between the quasi-touch point of the same numbered position and the first calibration touch point and the second calibration touch point is less than X, then the quasi-touch point is a real touch point, Where X>x>0.
- the steps to exclude ghost points and determine the actual touch points are: Comparing the first set of calibration touch points with the second set of calibration touch points, if the distance between the first calibration touch point and the second calibration touch point of the same number position is greater than Y, the quasi-touch corresponding to the number position The point is a ghost point; if the distance between the first calibration touch point and the second calibration touch point of the same number position is less than y, the quasi-touch point corresponding to the number position is a real touch point, where Y>y>0.
- the present invention also provides an infrared touch screen capable of identifying a plurality of touch points, the touch screen comprising:
- a first plurality of infrared emission tubes and a first plurality of infrared receiving tubes positioned along opposite edges of the touch detection area, and infrared light emitted by each of the first plurality of infrared emission tubes is Receiving by at least two infrared receiving tubes of the first plurality of infrared receiving tubes;
- a second plurality of infrared emission tubes and a second plurality of infrared receiving tubes positioned along the other two opposite edges of the touch detection area, and infrared light emitted by each of the second plurality of infrared emission tubes is Receiving, by the at least two infrared receiving tubes of the second plurality of infrared receiving tubes;
- a first processing module controlling activation of the first and second plurality of infrared transmitting tubes and controlling activation of the first and second plurality of infrared receiving tubes, and recording in-axis and off-axis scan data of the infrared transmitting tube and the infrared receiving tube ;
- the second processing module calculates the touch position of the one or more touch objects located on the touch detection area by reading the in-axis and off-axis scan data recorded in the first processing module a plurality of times.
- the second processing module is configured to:
- the acquiring the first set of calibration touch points is calculating a center of gravity of a boundary of the first calibration touch point acquired by the first direction off-axis scan.
- the acquiring the second calibration touch point set is obtained by calculating the second direction off-axis scan The first calibrated the center of gravity of the boundary of the touch point.
- the first direction off-axis is an off-axis that is at an angle opposite to the in-axis direction in a counterclockwise direction
- the second direction off-axis is an off-axis that is at an angle to the in-axis direction in a clockwise direction
- the first direction off-axis is an off-axis that is at an angle to the in-axis direction at a clockwise direction
- the second-direction off-axis is an off-axis that forms an angle with the in-axis direction in a counterclockwise direction.
- the angle between the off-axis of the first direction and the in-axis direction is the same as the angle between the off-axis of the second direction and the in-axis direction.
- the determining the boundary of the quasi-touch point is to read at least one of in-axis scan data, in-axis and off-axis scan data, and off-axis scan data of the infrared transmitting tube and the infrared receiving tube to obtain a touch point. Precise boundaries.
- the acquiring the set of quasi-touch points is calculating a center of gravity of a boundary of the quasi-touch point.
- the eliminating ghost points, determining the real touch points includes:
- the quasi-touch point is a ghost point. If the sum of the distance between the quasi-touch point of the same numbered position and the first calibration touch point and the second calibration touch point is less than X, the quasi-touch point is a real touch point. , where X>x>0.
- the eliminating ghost points, determining the real touch points includes:
- the quasi-touch corresponding to the number position is a ghost point. If the distance between the first calibration touch point and the second calibration touch point of the same number position is less than y, the quasi-touch point corresponding to the number position is a real touch point, where Y>y>0.
- the infrared touch screen multi-point identification method and the infrared touch screen provided by the present invention have at least the following advantages:
- the infrared touch screen multi-point identification method completes a full-screen scan on the basis of only one set of detecting components, and improves the algorithm to read the scan data multiple times to obtain a quasi-touch point set and a first calibration touch.
- a set of points and a second set of calibration touch points comparing the set of quasi-touch points with the first set of calibration touch points, the second set of calibration touch points, if the quasi-touch points of the same numbered position and the two calibration touches If the sum of the pitches of the points is greater than X, the quasi-touch points are ghost points.
- the quasi-touch point is a real touch point, where X>x>0; or the first calibration touch point is set and Comparing the second set of calibration touch points, if the distance between the two calibration touch points of the same number position is greater than Y, the corresponding quasi-touch point is a ghost point, and if the distance between the two calibration touch points of the same number position is less than y, then The corresponding quasi-touch point is a real touch point, where Y>y>0.
- the infrared touch screen adds a first processing module and a second processing module, and the first processing module controls activation of the first and second plurality of infrared transmitting tubes and controls the first and second plurality of infrared receiving tubes Activating, and recording in-axis and off-axis scan data of the infrared transmitting tube and the infrared receiving tube; the second processing module calculates the located position by reading the in-axis and off-axis scan data recorded in the first processing module a plurality of times Touching the touch location of one or more touch objects on the detection zone.
- the infrared touch screen can recognize multiple touch points by performing a full-screen scan with only one set of detecting elements.
- FIG. 1 is a schematic structural view of an embodiment of an infrared touch screen according to the present invention.
- FIG. 2 is a schematic diagram of obtaining a quasi-touch point by the infrared touch screen shown in FIG. 1;
- FIG. 3 is a schematic diagram of acquiring the first calibration touch point by the infrared touch screen shown in FIG. 1;
- FIG. 4 is a schematic diagram of acquiring the second calibration touch point by the infrared touch screen shown in FIG. 1;
- FIG. 5 is an infrared touch screen shown in FIG. 1 for removing ghost points, and identifying a schematic representation of the actual touch point;
- FIG. 6 is a schematic flow chart of an embodiment of a multi-point recognition method for an infrared touch screen according to the present invention. detailed description
- FIG. 1 is a schematic structural view of an embodiment of an infrared touch screen according to the present invention, the infrared touch screen comprising: two opposite edges along the touch detection area 101 (shown as touch detection area 101 in this embodiment)
- the first plurality of infrared transmitting tubes 102x and the first plurality of infrared receiving tubes 103x positioned in the X-axis direction, the infrared light emitted by each of the first plurality of infrared transmitting tubes 102x is At least two of the first plurality of infrared receiving tubes 103x are received; along the other two opposite edges of the touch detection area 101 (shown in the present embodiment as the y-axis direction of the touch detection area 101)
- the second processing module 105 first reads scan data of the infrared transmitting tube and the infrared receiving tube to determine a boundary of the quasi-touch point, wherein the boundary of the quasi-touch point is determined to be in the axis of the infrared transmitting tube and the infrared receiving tube. Scanning at least one of data, in-axis and off-axis scan data, off-axis scan data to obtain a precise boundary of the touch point, and then the second processing module calculates a center of gravity of a boundary of the quasi-touch point, the center of gravity being a quasi-touch point Coordinate position to obtain a set of quasi-touch points. As shown in FIG. 2, touch points A, B, C, and D are quasi-touch point sets.
- the second processing module 105 further reads scan data of the infrared emitting tube and the infrared receiving tube which are aligned in the first direction of the first direction in the first processing module, wherein the first direction is off-axis and the in-axis direction An off-axis that forms an angle in a counterclockwise direction, and calculates a center of gravity of a boundary of the first calibration touch point acquired by the first direction off-axis scan, the center of gravity being a coordinate position of the first calibration touch point, thereby obtaining a first calibration Touch the point set.
- the first direction off-axis is at an angle ⁇ with the in-axis direction
- the touch points A1, Bl, Cl, and D1 are the first set of calibration touch points.
- the second processing module 105 further reads scan data of the infrared emitting tube and the infrared receiving tube which are orthogonally aligned in the second direction recorded in the first processing module, wherein the second direction is off-axis and the in-axis direction Clip in a clockwise direction The off-axis of the angle, and then calculating the center of gravity of the boundary of the second calibration touch point acquired by the second direction off-axis scan, the center of gravity being the coordinate position of the second calibration touch point, thereby obtaining a second set of calibration touch points.
- the second direction off-axis is at an angle ⁇ with the in-axis direction
- the touch points ⁇ 2, ⁇ 2, C2, and D2 are the second set of calibration touch points.
- the second processing module 105 compares the quasi-touch point set with the first calibration touch point set and the second calibration touch point set, if the quasi-touch point of the same number position and the first calibration If the sum of the distances of the touch point and the second calibration touch point is greater than X, the quasi-touch point is a ghost point; if the sum of the quasi-touch point of the same numbered position and the distance between the first calibration touch point and the second calibration touch point is less than X , the quasi-touch point is a real touch point, where X > x > 0.
- the second processing module 105 compares the first set of calibration touch points with the second set of calibration touch points; if the distance between the first calibration touch point and the second calibration touch point of the same numbered position is greater than Y, then The quasi-touch point corresponding to the numbered position is a ghost point; if the distance between the first calibration touch point and the second calibration touch point of the same numbered position is less than y, the quasi-touch point corresponding to the numbered position is a real touch point, wherein , Y>y>0.
- A, Al, and A2 belong to the same numbered position
- B, Bl, and B2 belong to the same numbered position
- C, Cl, and C2 belong to the same numbered position
- D, D1, and D2 belong to the same numbered position
- a and c are smaller than x, b and d are greater than X, then the quasi-touch points A, C are real touch points, the quasi-touch points B, D are ghost points; or the spacing of two calibration touch points comparing the same numbered positions , that is, the size of A1A2, B1B2, C1C2, and D1D2 is compared.
- A1A2 and C1C2 are smaller than y, B1B2 and D1D2 are greater than Y, then the quasi-touch points A and C are real touch points, and the quasi-touch points B and D are ghost points.
- the first direction off-axis may be an off-axis that forms an angle with the in-axis direction in a clockwise direction
- the second direction off-axis may be an off-axis that forms an angle with the in-axis direction in a counterclockwise direction.
- the angle between the off-axis of the first direction and the in-axis direction is the same as the angle between the off-axis of the second direction and the in-axis direction.
- the infrared touch screen of the present invention is also capable of recognizing a plurality of touch points of two or more points, the principle of which is the same as identifying two touch points.
- FIG. 6 is a schematic flowchart diagram of an embodiment of an infrared touch screen multi-point identification method according to the present invention, where the infrared touch screen includes an infrared transmitting tube, an infrared receiving tube, and a touch detection area. And the processing unit, the infrared light emitted by the infrared transmitting tube is received by the at least two infrared receiving tubes through the touch detection area, and the method comprises the following steps:
- step 601 driving the infrared transmitting tube and the infrared receiving tube to scan the touch detection area and save the scan data;
- the infrared touch screen shown in FIG. 1 performs this step.
- the first processing module 104 controls activation of the first plurality of infrared transmitting tubes 102x and the second plurality of infrared transmitting tubes 102y and controls the first plurality of infrared receiving tubes 103x.
- step 602 the scanning data of at least the infrared emitting tube and the infrared receiving tube aligned in the axis are read, the boundary of the quasi-touch point is determined, and the quasi-touch point set is obtained.
- the infrared touch screen shown in FIG. 1 performs this step.
- the second processing module reads scan data of the infrared transmitting tube and the infrared receiving tube recorded in the first processing module to determine a boundary of the quasi-touch point, wherein Determining the boundary of the quasi-touch point is to read at least one of the in-axis scan data, the in-axis and off-axis scan data, and the off-axis scan data of the infrared emitter tube and the infrared receiver tube to obtain the precise boundary of the touch point, and then the second processing module
- the center of gravity of the boundary of the quasi-touch point is calculated, and the center of gravity is the coordinate position of the quasi-touch point, thereby acquiring the quasi-touch point set.
- touch points A, B, C, and D are quasi-touch point sets.
- step 603 the scan data of the infrared transmitting tube and the infrared receiving tube aligned in the first direction are read to obtain the first set of calibration touch points.
- the infrared touch screen shown in FIG. 1 performs this step. Specifically, the second processing module reads the first direction off-axis aligned infrared transmitting tube and the infrared receiving tube recorded in the first processing module, and then the first The second processing module calculates a center of gravity of a boundary of the first calibration touch point acquired by the first direction off-axis scan, and the center of gravity is a coordinate position of the first calibration touch point, thereby obtaining a first calibration touch point set. As shown in FIG. 3, the first direction off-axis is at an angle a to the in-axis direction, and the touch points Al, Bl, Cl, and D1 are the first set of calibration touch points.
- step 604 the scan data of the infrared transmitting tube and the infrared receiving tube aligned in the second direction are read to obtain a second set of calibration touch points.
- the infrared touch screen shown in FIG. 1 performs this step, specifically, the second processing module reads Taking an infrared transmitting tube and an infrared receiving tube that are off-axis aligned in a second direction recorded in the first processing module, and then the second processing module calculates a center of gravity of a boundary of the second calibration touch point acquired by the second direction off-axis scanning And the center of gravity is a coordinate position of the second calibration touch point, thereby obtaining a second calibration touch point set.
- the second direction off-axis is at an angle ⁇ to the in-axis direction
- the touch points ⁇ 2, B2, C2, and D2 are the second set of calibration touch points.
- step 605 Go to step 605 to compare the quasi-touch point set, the first calibration touch point set, and the second calibration touch point set, exclude ghost points, and determine a real touch point.
- the infrared touch screen shown in FIG. 1 performs this step.
- the second processing module 105 compares the quasi-touch point set with the first calibration touch point set and the second calibration touch point set. If the sum of the quasi-touch point of the same numbered position and the distance between the first calibration touch point and the second calibration touch point is greater than X, the quasi-touch point is a ghost point; if the quasi-touch point of the same numbered position and the first calibration touch point The sum of the pitches of the second calibration touch points is less than X, and the quasi-touch points are real touch points, where X > x > 0. Still alternatively, the second processing module compares the first set of calibration touch points with the second set of calibration touch points.
- the quasi-touch point corresponding to the number position is a ghost point; if the first calibration touch point and the second calibration touch of the same number position If the pitch of the dots is smaller than y, the quasi-touch point corresponding to the numbered position is a real touch point, where Y>y>0.
- A, Al, and A2 belong to the same numbered position
- B, Bl, and B2 belong to the same numbered position
- C, Cl, and C2 belong to the same numbered position
- D, D1, and D2 belong to the same numbered position
- X, x, Y and y are preset decision thresholds.
- the first direction off-axis may be an off-axis that forms an angle with the in-axis direction in a clockwise direction
- the second direction off-axis may also be a counterclockwise direction with the in-axis direction.
- the off-axis of the angle Preferably, the angle between the off-axis of the first direction and the in-axis direction is the same as the first
- the angle between the off-axis of the two directions and the in-axis direction is the same.
- the infrared touch screen multi-point recognition method according to the present invention is also capable of recognizing a plurality of touch points of two or more points, the principle of which is the same as identifying two touch points.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11842901.8A EP2645213A4 (en) | 2010-11-26 | 2011-10-20 | METHOD FOR MULTIPOINT RECOGNITION ON INFRARED TOUCH SCREEN AND SCREEN OF THIS TYPE |
US13/989,723 US9395849B2 (en) | 2010-11-26 | 2011-10-20 | Infrared touch screen multi-point recognizing method and infrared touch screen |
KR1020137015253A KR20130136485A (ko) | 2010-11-26 | 2011-10-20 | 적외선 터치 스크린 멀티-포인트 인식 방법 및 적외선 터치 스크린 |
Applications Claiming Priority (2)
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CN2010105624304A CN102479000A (zh) | 2010-11-26 | 2010-11-26 | 一种红外触摸屏多点识别方法及一种红外触摸屏 |
CN201010562430.4 | 2010-11-26 |
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WO2012068933A1 true WO2012068933A1 (zh) | 2012-05-31 |
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PCT/CN2011/081006 WO2012068933A1 (zh) | 2010-11-26 | 2011-10-20 | 一种红外触摸屏多点识别方法及一种红外触摸屏 |
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US (1) | US9395849B2 (zh) |
EP (1) | EP2645213A4 (zh) |
KR (1) | KR20130136485A (zh) |
CN (1) | CN102479000A (zh) |
WO (1) | WO2012068933A1 (zh) |
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CN103472958A (zh) * | 2013-08-27 | 2013-12-25 | 合肥工业大学 | 一种基于红外多点触摸计算坐标的新算法 |
CN103472958B (zh) * | 2013-08-27 | 2016-08-10 | 合肥工业大学 | 一种基于红外多点触摸计算坐标的方法 |
CN105760023A (zh) * | 2016-02-18 | 2016-07-13 | 广州华欣电子科技有限公司 | 一种红外对管触摸屏的扫描方法及装置 |
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CN109542276A (zh) * | 2018-11-22 | 2019-03-29 | 青岛海信商用显示股份有限公司 | 一种触控点识别方法及装置和显示设备 |
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CN102479000A (zh) | 2012-05-30 |
EP2645213A1 (en) | 2013-10-02 |
KR20130136485A (ko) | 2013-12-12 |
EP2645213A4 (en) | 2016-03-16 |
US20130234993A1 (en) | 2013-09-12 |
US9395849B2 (en) | 2016-07-19 |
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