CN101719042B - Method for improving scanning speed of infrared touch screen - Google Patents
Method for improving scanning speed of infrared touch screen Download PDFInfo
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- CN101719042B CN101719042B CN2010100193881A CN201010019388A CN101719042B CN 101719042 B CN101719042 B CN 101719042B CN 2010100193881 A CN2010100193881 A CN 2010100193881A CN 201010019388 A CN201010019388 A CN 201010019388A CN 101719042 B CN101719042 B CN 101719042B
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Abstract
The invention provides a method for improving the scanning speed of a touch screen, which comprises the following steps of: A. sequentially scanning all infrared transmitting pipes and receiving pipes in the transverse direction and the longitudinal direction and detecting whether a touch object exists or not; B. when the touch object is detected, recording the frequency N for continuously detecting the touch object in set cycle time; when N is larger than or equal to 2, calculating the average speed V of the touch object moving to N from N-1, calculating an angle A in the moving direction of the touch object and recording coordinates (X,Y) of the touch object when moving to the N touch point, wherein the current speed is V0, and the scanning cycle of a controller is T; C. when V is larger than or equal to a set value V1, the V1 is smaller than a preset speed threshold value VMAX, calculating a new detecting area which is a first closed area adopting a line segment using the coordinates (X,Y) as an initial point as a middle axis in the moving direction of the touch object; when V is smaller than V1, calculating a new detecting area which is a second closed area adopting the coordinates (X,Y) as a center; and D. scanning the infrared transmitting pipes and the receiving pipes in the new detecting area in the transverse direction and the longitudinal direction and judging whether the touch object exists or not, if so, turning to the step B; and otherwise, turning to the step A. The method adjusts and scans the detecting area according to the difference of the moving speed of the touch object and improves the scanning speed and the touch precision.
Description
Technical field
The present invention relates to the infrared touch panel applied technical field, particularly a kind of infrared touch scan method and control device thereof, infrared touch system.
Background technology
Infrared touch system makes man-machine interaction more directly perceived as a kind of novel computer entry device.The infrared touch technology also is applied in fields such as information household appliances, public information, electronic game, business automation equipment except being applied in portable personal information products field.Infrared touch system of the prior art generally includes two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array on horizontal and vertical.Under the situation of single-point touches; These two groups of infrared transmitting tubes and infrared receiving tube periodically scan display screen; According to laterally and the position of the infrared receiving tube that changes of the reception signal vertically, can confirm that the touch point is at difference position coordinates constantly.
But because each scan period all will be carried out run-down to infrared transmitting tube and infrared receiving tube on laterally reaching vertically, need expend for a long time, the fast inadequately problem of response speed can occur; Special the number of needed infrared transmitting tube and infrared receiving tube is more for the bigger infrared touch system of display screen, and the run-down required time is longer, the slow problem of infrared touch system response speed more can occur.
The method of more existing at present raising infrared touch system sweep velocitys; As shorten service time of every pair of infrared transmitting tube and infrared receiving tube; But owing to shortened the service time of infrared transmitting tube; In order to make infrared receiving tube in service time, can receive the signal that infrared transmitting tube is launched, then must increase the emissive power of infrared transmitting tube, long-time high power work can shorten the serviceable life of infrared transmitting tube.
The conventional way that recomputates the method for new surveyed area in the prior art is: touch objects is with the speed V of maximum possible
MAXAt (V laterally or when vertically moving
MAXRefer to the highest permission translational speed, when promptly touch objects moved to be lower than this speed, touch apparatus could operate as normal, surpassed and then can't detect, and generally this speed is all far above the normal touch translational speed, general V
MAX=3 meter per seconds), in the cycle length of region-wide each frame of scanning, the infrared emission that the distance that the calculating touch objects moves can be crossed over receives the quantity N to pipe
Ir, be the center with the touch objects that detects, N is respectively got in both sides on horizontal and vertical
IrIt is surveyed area that individual infrared emission receives the rectangle that pipe is formed.The scanning area that this method is calculated is still too big, still is not ideal enough to improving sweep velocity.
Summary of the invention
According to the problem that exists in the above-mentioned prior art, the object of the present invention is to provide a kind of direction and speed that moves according to touch objects, adjust scanning area in real time to improve the method for scanning speed of infrared touch screen.
A kind of method that improves scanning speed of infrared touch screen, it may further comprise the steps:
The controller of A, infrared touch panel scans horizontal and vertical all infrared transmitting tubes and the receiving tube gone up successively, and whether detect has touch objects to exist;
B, when detecting touch objects; Be recorded in setting cycle and continue to detect the times N of touch objects in the time, when N >=2, calculate touch objects and move to the average velocity V of N from N-1, the angle of calculating the touch objects moving direction is A; And the coordinate of meter record touch objects when moving to N touch point is (X; Y), present speed is V0, and the scan period of said controller is T;
C, as average velocity V during more than or equal to setting value V1, this V1 is less than pre-set velocity threshold value V
MAX, calculate new surveyed area and be: (X Y) for the line segment of starting point is first enclosed region of axis with coordinate on the touch objects moving direction; The lateral length of this first enclosed region is greater than V0*T*Cos (A), and the longitudinal length of this first enclosed region is greater than V0*T*Sin (A);
As average velocity V during less than setting value V1, calculating new surveyed area is that (X Y) is second enclosed region at center, and said second enclosed region is that (X is L for the length of side value at center Y) with coordinate with coordinate
IrSquare area: (X-L
Ir/ 2, X+L
Ir/ 2), (Y-L
Ir/ 2, Y+L
Ir/ 2); Wherein, L
Ir=N
Ir* pipe width, said N
IrFor touch objects in region-wide scan period time T with pre-set velocity threshold value V
MAXIn the quantity apart from the infrared emission receiving tube that can cross over horizontal or that vertically move;
Horizontal and vertical infrared transmitting tube and the receiving tube of in the new surveyed area of the controller of D, infrared touch panel scanning judged whether touch objects, if touch objects is arranged then jump to step B, otherwise jumps to steps A.
Further, among the said step C as | Cos (A) | in the time of＜1/5, the lateral length value of this first enclosed region is V0*T/2, as | Sin (A) | in the time of＜1/5, the longitudinal length value of this first enclosed region is V0*T/2.
Said first enclosed region and second enclosed region are rectangle.
Also comprise among the said step B calculating in region-wide scan period time T touch objects with pre-set velocity threshold value V
MAXAt the quantity N apart from the infrared emission receiving tube that can cross over horizontal or that vertically move
Ir, length L
Ir=N
Ir* pipe width=V
MAX* T, said V1 is less than V
MAXAs average velocity V during more than or equal to setting value V1, said first enclosed region can be for (X, Y) for the line segment of starting point is cornerwise square, the span of the length of this line segment is L with coordinate on the touch objects moving direction among the said step C
IrExtremely
Said V1 equals V
MAX/ 2.Said first enclosed region also comprises: (X is that the line segment of starting point is as cornerwise the 3rd enclosed region Y) with coordinate on the opposite direction of touch objects moving direction.
Again further; As average velocity V during more than or equal to setting value V1, the length value of said line segment is specially for
said square area among the said step C:
When 90 °＞A>=0 °, said square area does
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A));
When 180 °＞A>=90 °, said square area is (X-L
Ir* Sin (A-45), X+L
Ir* Cos (A-45)),
When 270 °＞A>=180 °, said square area does
(Y-L
Ir* Sin (A-135), Y+L
Ir* Cos (A-135));
When 360 °＞A>=270 °, said square area is (X-L
Ir* Cos (A-225), X+L
Ir* Sin (A-225)),
As average velocity V during less than setting value V1, said second enclosed region is that (X is L for the length of side value at center Y) with coordinate among the said step C
IrSquare area: (X-L
Ir/ 2, X+L
Ir/ 2), (Y-L
Ir/ 2, Y+L
Ir/ 2).
Said step C comprises that also the trend that the current touch objects of calculating moves is to quicken or deceleration; If slow down,, calculate new surveyed area and do as average velocity V during more than or equal to setting value V2
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A)), as average velocity V during less than setting value V2, calculating new surveyed area is (X-L
Ir/ 2, X+L
Ir/ 2), (Y-L
Ir/ 2, Y+L
Ir/ 2); Said V2 is less than V1.
The inventive method is according to the different adjustment of touch objects translational speed scanography zone, and the scanning area of comparing prior art reduces 40%-50%, has improved sweep velocity, has also reduced the horizontal and vertical mistiming of going up scanning simultaneously, has improved the touch precision.
Description of drawings
Fig. 1 is the hardware system block diagram that a kind of method that improves scanning speed of infrared touch screen of the present invention is being suitable for;
Fig. 2 is a kind of process flow diagram that improves the method for scanning speed of infrared touch screen of the present invention;
Fig. 3 is that a kind of scanning area that improves the method for scanning speed of infrared touch screen of the present invention is selected synoptic diagram;
The synoptic diagram of the movement angle A of the touch objects that is scanned on the infrared touch panel among the present invention during Fig. 4.
Embodiment
The invention provides a kind of method that improves scanning speed of infrared touch screen, to the defective that prior art exists, only upgrade controller software improves the scanning detection speed to reach.
Method of the present invention is on the hardware platform of existing infrared touch panel, to realize not extra increase hardware cost.Infrared touch screen systems around mounted in pairs infrared transmission module and infrared receiving module; Infrared transmission module is made up of decoding scheme, driving circuit and infrared transmitting tube; Infrared receiving module is made up of decoding scheme, driving circuit and infrared receiving tube, and all infrared emission and infrared reception have been formed the infrared scan net to pipe.Controller can be selected any one infrared transmitting tube and infrared receiving tube through data bus by each transmitter module and the decoding scheme of accepting in the module; Controller scans the horizontal and vertical infrared signal the intensity all or appointed area that successively; Detect the situation of blocking of the infrared signal in the infrared scan net and judge that no touch is arranged; And the calculating touch coordinate, be sent to computing machine.
The conventional way that recomputates the method for new surveyed area in the prior art is the speed V of touch objects with maximum possible
MAXAt (V laterally or when vertically moving
MAXRefer to the highest permission translational speed speed, when promptly touch objects moved to be lower than this speed, touch apparatus could operate as normal, surpassed and then can't detect, and generally this speed is all far above the normal touch translational speed, general V
MAX=3 meter per seconds), in the cycle length of region-wide each frame of scanning, the infrared emission that the distance that the calculating touch objects moves can be crossed over receives the quantity N to pipe
Ir, be the center with the touch objects that detects, N is respectively got in both sides on horizontal and vertical
IrIt is surveyed area that individual infrared emission receives the rectangle that pipe is formed.
In the touch objects moving process, according to direction and the speed that touch objects moves, adjust scanning area in real time, in the touch objects low speed moving process, mainly with translational speed decision touch area; In the touch objects high-speed mobile process, decide the touch area, can also insert a plurality of velocity step ladders at low speed and at a high speed as required, select with further optimization touch area with translational speed and direction.
Touch objects is in the low-speed motion process, and direction is easy to change, but the scope that moves in its short time but is limited; What at this moment play a decisive role is the speed of touch objects; And aspect effect is less, can select a fixing zone as scanning area, and the zone should be greater than being the zone at center with current touch point; Horizontal and vertical length L＞the 2*V*T in this zone (V: present speed, T: the current used time of scanning one frame);
After touch objects reached certain speed, its directivity was strengthened gradually, and the moving direction of touch objects is difficult to take place than about-face, so new scanning area can be chosen on the moving direction of touch objects at short notice; Area size is determined that by current translational speed this zone is length L＞V*T*Cos (A) transversely, (V:0 present speed, T: current used time of scanning one frame; A: current direction of motion, when Cos (A)=0, get L >=V*T/2); Length L＞V*T*Sin (A) is vertically gone up in this zone, (V: present speed, T: current used time of scanning one frame; A: current direction of motion, when Sin (A)=0, get L >=V*T/2).This scanography zone can also extend upward certain zone the negative side of touch objects moving direction, can guarantee higher reliability.
With reference to figure 1 and Fig. 2, a kind of method that improves the touch-screen sweep velocity provided by the invention, it may further comprise the steps:
S01, controller scan horizontal and vertical all infrared emission that go up successively and receive pipe, and whether detect has touch objects to exist, if do not detect touch objects then continue execution in step S01;
S02, when detecting touch objects; Be recorded in setting cycle and continue to detect the times N of touch objects in the time; When N>=2, calculate touch objects moves to N from N-1 average velocity V; And the coordinate of meter record touch objects when moving to N touch objects for (X, Y), calculating in region-wide scan period time T touch objects with pre-set velocity V
MAXAt the quantity N apart from the infrared emission receiving tube that can cross over horizontal or that vertically move
Ir, length L
Ir=N
Ir* pipe width=V
MAX* T; And judge that current movement tendency is to quicken or deceleration;
If the S03 present speed is a boost phase, as V>=V
1The time (said V1 is less than maximal rate V
MAX, general V1=V
MAX/ 2), employing method one is calculated new surveyed area, and promptly calculate new surveyed area and be: (X Y) for the line segment of starting point is first enclosed region of axis with coordinate on the touch objects moving direction; This enclosed region can be circle or ellipse or rectangular area; The general selection used square area, and promptly (X, Y) for the line segment of starting point is cornerwise square area, the span of the length of this line segment is L with coordinate on the touch objects moving direction
IrExtremely
Best value does
Also can select to use diameter to do
Border circular areas;
As V＜V
1The Shi Caiyong method two calculates new surveyed area; Promptly calculate new surveyed area for (X Y) is second enclosed region at center with coordinate; This enclosed region can be circle or ellipse or rectangular area; Generally also select to use square area, promptly calculate new surveyed area for (X Y) is the square area at center, and the span of this foursquare length of side is V*T to V1*T with coordinate; The best is length of side L
IrSquare area; If present speed is the decelerating phase, as V>=V
2Shi Caiyong said method one calculates new surveyed area, as V＜V
2Shi Caiyong said method two calculates new surveyed area; V2 is less than V1;
S04, horizontal and vertical infrared transmitting tube and the receiving tube of in the new inspection area of controller scanning have judged whether touch objects, carry out if having then jump to S02, carry out otherwise jump to S01;
Employing method one is calculated new surveyed area in the inventive method, and specific as follows: touch objects is with the speed V of maximum possible
MAXLaterally or when moving vertically, in cycle length, promptly scan horizontal and vertical all infrared tubes of going up in the needed time cycle with region-wide each frame of scanning, calculate the quantity N of the infrared emission receiving tube that distance that touch objects moves can cross over
Ir, length is L
Ir=N
Ir* pipe width=V*T chooses a zone in the touch objects moving direction, establish touch article coordinate for (X, Y), the angle of moving direction is A (like Fig. 4, A＜90 °), on moving direction, gets
For cornerwise square is a surveyed area, is converted into the horizontal and vertical surveyed area of going up and is:
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A)), concrete is broken down as follows:
When 90 °＞A>=0 °, surveyed area does
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A));
When 180 °＞A>=90 °, surveyed area is (X-L
Ir* Sin (A-45), X+L
Ir* Cos (A-45)),
When 270 °＞A>=180 °, surveyed area does
(Y-L
Ir* Sin (A-135), Y+L
Ir* Cos (A-135));
When 360 °＞A>=270 °, surveyed area is (X-L
Ir* Cos (A-225), X+L
Ir* Sin (A-225)),
Selecting the method one in zone mainly is to estimate the zone that touch objects possibly occur, and is not what formula of absolute employing in the selection in zone.
Adopt method two to calculate new surveyed area in the inventive method, specific as follows: touch objects is with the speed V of maximum possible
MAXLaterally or when moving vertically, in cycle length, calculate the quantity N of the infrared emission receiving tube that distance that touch objects moves can cross over region-wide each frame of scanning
Ir, length is L
Ir=N
Ir* pipe width, this moment touch article coordinate be (X, Y), the angle of moving direction is A, so transversely selecting regional method is to get (X-L
Ir/ 2, X+L
Ir/ 2); The same method that vertically goes up the selection zone is to get (Y-L
Ir/ 2, Y+L
Ir/ 2).
The inventive method is selected zones of different with friction speed; Main consideration finds that in test finger speed when mobile generally can directly not become at a high speed by low speed, but individual the acceleration or moderating process arranged; May vary in the direction of motion in low-speed motion stage, when selecting the zone with V
MAXThe quantity that/2 infrared emission that in a frame, can cross over for the speed calculation touch objects receive pipe is N
Ir/ 2 (general V
MAX=3 meter per seconds, and the normal writing speed of common people all is lower than 1 meter per second, even get V
MAX/ 2=1.5 meter per second is a low speed and separation at a high speed, also is enough to satisfy design requirement) be that horizontal and vertical each N of both sides of going up is set at the center with current touch objects
Ir/ 2 is surveyed area; And its direction of motion does not have the change greater than 90 degree when high-speed motion, if big variation is arranged, will inevitably experience a decelerating phase, so quickening in the moving process setting speed greater than V when touch objects
1For getting into high-speed motion, the zone of setting so mainly is chosen in gets N on the direction of motion
Ir, and on its contrary direction, only detect N
Ir/ 10 infrared emission receiving tube quantity, when touch objects in the deceleration moving process setting speed less than V
2Be low-speed motion, then adopt method two to come regions, the V here
1And V
2Can be the same or different, scheme is to select V preferably
1＞V
2
The inventive method is compared of the prior art with 2*L according to the different adjustment of touch objects translational speed scanography zone
IrFor the square area area of the length of side has reduced 40%-50%, dwindled scanning area, improved sweep velocity, also reduced the horizontal and vertical mistiming of going up scanning simultaneously, improved the touch precision.
The method of raising scanning speed of infrared touch screen of the present invention; Speed through moving according to touch objects is provided with different scanning areas with direction; Some infrared emission receive pipe as surveyed area before and after when touch objects speed is low, selecting touch objects; When touch objects speed reached preset value, the zone on the selected touch objects moving direction was a surveyed area.Adopt the inventive method to reduce infrared emission and receive the number to pipe, improved sweep velocity, counting of gathering in the identical time is more, and person's handwriting is better, and it is higher to touch accuracy of detection.
Hardware system figure in Fig. 1 the inventive method, the 101st, receiver module; The 102nd, transmitter module; The 103rd, the main control module; The 104th, with the data bus that transmitter module is connected with receiver module, master controller can be selected any a pair of infrared emission receiving tube in transmitter module and the receiver module through data bus, can light infrared transmitting tube and gather infrared signal intensity; The 105th, display device, promptly all infrared scan zones.Wherein main control module is responsible for accomplishing control, logic determines and the computing work in the technique scheme, comprises above-mentioned be used for the calculating method one of new surveyed area and the algorithm of method two.
Fig. 3 is that the present invention improves scanning speed of infrared touch screen method scanning area selection synoptic diagram; The 301st, a touch track in the touch area; 302, the 303, the 304th, in the part touch point that infrared touch panel scans; A plurality of touch points are arranged in touch track,, after detecting 302,303,304 touch point, can select 305,306,307 zones as new scanning area according to the method for prior art; And, can select 308,309,310 zones as new scanning area according to the inventive method; When the position that touches 302, current touch track is in boost phase, but speed V＜V1; Can select scanning area according to method two, when the position that touches 303, current touch track is in boost phase; But speed V＞V1 can select scanning area according to method one, when the position that touches 304; Current touch track is in the decelerating phase, but speed V＜V1 selects scanning area according to method two.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (7)
1. method that improves scanning speed of infrared touch screen is characterized in that may further comprise the steps:
The controller of A, infrared touch panel scans horizontal and vertical all infrared transmitting tubes and the receiving tube gone up successively, and whether detect has touch objects to exist;
B, when detecting touch objects; Be recorded in setting cycle and continue to detect the times N of touch objects in the time, when N >=2, calculate touch objects and move to the average velocity V of N from N-1, the angle of calculating the touch objects moving direction is A; And the coordinate of record touch objects when moving to N touch point is (X; Y), present speed is V0, and the scan period of said controller is T;
C, as average velocity V during more than or equal to setting value V1, this V1 is less than pre-set velocity threshold value V
MAXCalculating new surveyed area is: on the touch objects moving direction with coordinate (X; Y) for the line segment of starting point be first enclosed region of axis, the lateral length of this first enclosed region is greater than V0*T*Cos (A), and the longitudinal length of this first enclosed region is greater than V0*T*Sin (A);
As average velocity V during less than setting value V1, calculating new surveyed area is that (X Y) is second enclosed region at center, and said second enclosed region is that (X is L for the length of side value at center Y) with coordinate with coordinate
IrSquare area: (X-L
Ir/ 2, X+L
Ir/ 2), (Y-L
Ir/ 2, Y+L
Ir/ 2); Wherein, L
Ir=N
Ir* pipe width, said N
IrFor touch objects in region-wide scan period time T with pre-set velocity threshold value V
MAXIn the quantity apart from the infrared emission receiving tube that can cross over horizontal or that vertically move;
Horizontal and vertical infrared transmitting tube and the receiving tube of in the new surveyed area of the controller of D, infrared touch panel scanning judged whether touch objects, if touch objects is arranged then jump to step B, otherwise jumps to steps A.
2. a kind of method that improves scanning speed of infrared touch screen according to claim 1 is characterized in that first enclosed region among the said step C and second enclosed region are rectangle.
3. a kind of method that improves scanning speed of infrared touch screen according to claim 2; It is characterized in that; Among the said step C, when | Cos (A) | in the time of＜1/5, the lateral length of said first enclosed region is V0*T/2; When | Sin (A) | in the time of＜1/5, the longitudinal length of said first enclosed region is V0*T/2.
4. a kind of method that improves scanning speed of infrared touch screen according to claim 3 is characterized in that, also comprise among the said step B calculating in time T touch objects with pre-set velocity threshold value V
MAXAt the quantity N apart from the infrared emission receiving tube that can cross over horizontal or that vertically move
Ir, length L
Ir=N
Ir* pipe width=V
MAX* T;
As average velocity V during more than or equal to setting value V1, said first enclosed region is that (X, Y) for the line segment of starting point is cornerwise rectangle, the span of this cornerwise length is L with coordinate on the touch objects moving direction among the said step C
IrExtremely
5. a kind of method that improves scanning speed of infrared touch screen according to claim 3; It is characterized in that; Said first enclosed region also comprises: (X is that the line segment of starting point is as cornerwise the 3rd enclosed region Y) with coordinate on the opposite direction of touch objects moving direction.
6. a kind of method that improves scanning speed of infrared touch screen according to claim 4; It is characterized in that; Among the said step C as average velocity V during more than or equal to setting value V1; The length value of said line segment is
, and said square area is specially:
When 90 °＞A>=0 °, said square area does
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A));
When 180 °＞A>=90 °, said square area is (X-L
Ir* Sin (A-45), X+L
Ir* Cos (A-45)),
When 270 °＞A>=180 °, said square area does
(Y-L
Ir* Sin (A-135), Y+L
Ir* Cos (A-135));
When 360 °＞A>=270 °, said square area is (X-L
Ir* Cos (A-225), X+L
Ir* Sin (A-225)),
7. a kind of method that improves scanning speed of infrared touch screen according to claim 6 is characterized in that, said step C comprises that also the trend that the current touch objects of calculating moves is to quicken or deceleration; If slow down,, calculate new surveyed area and do as average velocity V during more than or equal to setting value V2
(Y-L
Ir* Sin (45-A), Y+L
Ir* Cos (45-A)),
As average velocity V during less than setting value V2, calculating new surveyed area is (X-L
Ir/ 2, X+L
Ir/ 2), (Y-L
Ir/ 2, Y+L
Ir/ 2); Said V2 is less than V1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102184061B (en) * | 2011-06-14 | 2013-05-29 | 广州视睿电子科技有限公司 | Infrared tube detection method and device of touch screen |
| CN102305924A (en) * | 2011-06-24 | 2012-01-04 | 广州视睿电子科技有限公司 | Infrared positioning method and equipment |
| CN102455830B (en) * | 2011-11-30 | 2014-07-23 | 广东威创视讯科技股份有限公司 | Infrared touch device and method |
| CN103455194B (en) * | 2013-02-04 | 2016-12-28 | 南昌欧菲光科技有限公司 | touch screen scanning method, system and device |
| CN104635997A (en) * | 2013-11-13 | 2015-05-20 | 天津联远融众科技有限公司 | Infrared interaction electronic whiteboard and signal processing method thereof |
| CN104898900B (en) * | 2015-06-25 | 2018-05-01 | 广州华欣电子科技有限公司 | A kind of method and infrared touch frame of the scanning of infrared touch frame |
| CN113129438B (en) * | 2020-01-15 | 2023-06-23 | 阿里巴巴集团控股有限公司 | Method and device for improving precision of lane line and readable storage medium |
| CN112433642B (en) * | 2020-11-19 | 2022-10-18 | 湖北久之洋红外系统股份有限公司 | Method for improving scanning speed of infrared touch screen |
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| CN101162417A (en) * | 2006-10-13 | 2008-04-16 | 北京汇冠新技术有限公司 | Method for improving infrared touch screen response speed |
| CN101477429A (en) * | 2009-01-20 | 2009-07-08 | 贺伟 | Infrared touch screen scanning method |
| CN101551729A (en) * | 2009-05-13 | 2009-10-07 | 广东威创视讯科技股份有限公司 | Infrared touch scanning method and control device, infrared touch system of the same |
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|---|---|
| CN101719042A (en) | 2010-06-02 |
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