CN103744558B - Intelligent dead point recognition and self-adaptation compensation method for infrared touch screen - Google Patents
Intelligent dead point recognition and self-adaptation compensation method for infrared touch screen Download PDFInfo
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- CN103744558B CN103744558B CN201310626760.9A CN201310626760A CN103744558B CN 103744558 B CN103744558 B CN 103744558B CN 201310626760 A CN201310626760 A CN 201310626760A CN 103744558 B CN103744558 B CN 103744558B
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Abstract
The invention relates to an automatic fault detection and compensation method for an infrared touch screen, in particular to an intelligent dead point recognition and self-adaptation compensation method used for conducting recognition and self-adaption compensation on dead points caused due to the fact that infrared transmitting tubes and infrared receiving tubes in the infrared touch screen are damaged or foreign bodies enter a touch area, and accordingly shielding is caused. According to the intelligent dead point recognition and self-adaptation compensation method for the infrared touch screen, the dead points (including those caused by infrared damage or foreign body shielding) of the touch screen can be recognized in real time, and self-adaptation compensation measures are taken, so that it is guaranteed that the infrared touch screen can still work at a normal resolution when the dead points exist, stability of the infrared touch screen is improved, and the service life of the infrared touch screen is prolonged. Besides, the normal work state of the infrared touch screen can be restored in real time after the dead points are repaired or the foreign bodies are removed.
Description
Technical field
The present invention relates to the fault automatic detection of infrared touch panel and compensation method, particularly in infrared touch panel because
Infrared transmitting tube and the touch dead point that infrared receiving tube damages or foreign matter entrance touch area generation is blocked and led to carry out intelligence
Can identification and adaptive equalization.
Background technology
With the lifting further of man-machine interaction demand, touch screen technology application is increasingly extensive.Touch-screen has spirit directly perceived
The characteristic lived, using the teaching of the invention it is possible to provide more friendly user interface, makes faster and more convenient operation.According to the difference of adopted technology, touch
Touch screen and can be divided into infrared touch panel, electric resistance touch screen, capacitance touch screen, surface acoustic wave touch screen etc..Wherein adopt infrared ray
The infrared touch panel of technology is the development trend touching screen products main flow, infrared touch panel and resistance, electric capacity, surface acoustic wave touch
Shielding the clear superiority compared is using optical touchless touch manner, is not subject to electric current, voltage and electrostatic interference, touch interface is not afraid of
Low and suitable rugged environment condition of contaminated, maintenance cost etc..
Infrared touch panel is to install infrared transmitting tube and infrared receiving tube in screen surrounding, by microprocessor control horizontal,
In perpendicular both direction, infrared transmitting tube scans successively, and corresponding infrared receiving tube detects and forms echelette, when touching object resistance
Carry out shadowing by the response voltage value changes of corresponding infrared receiving tube during gear IR to determine thus carrying out touch coordinate
The technology of position.
By the operation principle of infrared touch panel, the key factor of infrared touch panel normal work is infrared transmitting tube
Normal luminous and infrared receiving tube can normally produce response voltage when receiving IR.When infrared transmitting tube or red
When outer reception pipe is damaged, response magnitude of voltage will drop to minimum, thus will be considered as to have touching object entering in shadowing
Row touch operation；When there being extraneous foreign matter to be attached on screen, also IR can be blocked it is considered to be touch operation, this two
Kind of situation all can produce touch dead point, thus causing mistaken touch or touch position offset so that infrared touch panel operation irregularity.
So carrying out real-time Intelligent Recognition and compensation technique to touch precision, the resolution ratio ensureing infrared touch panel to touching dead point,
Improve job stability and the life-span of touch-screen just seems particularly critical.
Patent No. cn101369201a proposes a kind of infrared touch panel fault pipe fast searching method.The patent No.
Cn203117378u proposes a kind of infrared touch panel automatic failure detection circuit.Patent No. cn102662533a proposes a kind of elimination
Improper contact interference method in infrared touch system.Above patent has when solving and touching dead point identification and process problem
Weak point.
Wherein, cn101369201a only proposes the method judging fault pipe by infrared receiving tube magnitude of voltage, adopts this
Method not can determine that infrared transmitting tube damages or infrared receiving tube damages, and work as and have sustained touch or foreign matter to block
When, the method will be unable to judgement to be normal touch or breaks down pipe；The automatic failure detection circuit that cn203117378u proposes can
It is that infrared transmitting tube damages or infrared receiving tube damages with quick detection, and can prevent from judging by accident in the case of normal touch
For fault pipe, however it is necessary that hardware modifications are carried out to infrared touch panel, install the infrared transmitting tube array of independent control additional, cost has
Improved and can to a certain degree be increased the housing size of infrared touch panel and the difficulty of hardware circuit design and Software for Design；
Cn102662533a propose improper contact interference elimination method start when carry out improper contact detection and will be improper
Contact area shields, and other touch areas can normally use.But foreign matter occurs suddenly in infrared touch panel normal work
Enter touch area to will be unable to detect, and also cannot in real time shielding be taken when the foreign matter of improper contact removes touch area
Disappear, judged and shield when can only wait start again.In addition to this above-mentioned deficiency, three above patent does not all mention fault
How pipe carries out real-time adaptive equalization after judging and makes infrared touch panel ensure that precision and resolution ratio continue normal work
Making, thus ensure precision and the resolution ratio of touch-screen when there is to touch dead point situation, improving the working stability of infrared touch panel
Property, extend its service life.
Content of the invention
Goal of the invention
The present invention provides a kind of intelligent dead point recognition and self-adaptation compensation method for infrared touch screen, and the method can be real-time
Identify the dead point (include infrared tube damage and foreign matter blocks) of touch-screen and carry out adaptive equalization measure it is ensured that infrared touch
Touch screen still to be able to work with normal resolution in the case of having dead point, improve the stability of infrared touch panel and prolongation uses the longevity
Life, and infrared touch panel normal operating conditions can be recovered in real time after dead point is repaired or foreign matter removes.
Technical scheme:
In infrared touch panel normal work, real-time Intelligent Recognition goes out foreign matter entrance touch area or infrared tube damages
And the position (pipe number) at touch dead point producing and fault type (damage as infrared transmitting tube or infrared receiving tube, or all
Damage), storage touches dead point information, and adaptive according to position and fault type finds nearest normal of peripheral distance
Infrared tube adopts oblique scan mode to substitute the scanning of fault pipe position, changes when foreign matter removal touch area or by fault pipe
Afterwards, identify that the pipe that is out of order improves and restores it use, using normal scanning process in real time.
A kind of infrared touch panel dead point intelligent identification Method, specifically comprises the following steps that
In a1, infrared touch panel normal work, continuous touch of statistics each pair infrared tube blocks number of times, root at regular intervals
According to statistics information judge in this time period all the time by touch block as fault pipe, be identified as touching dead point.
Described a1 step, ought every countnum scan period t particularly as follows: in infrared touch panel course of normal operation
It is judged as in the front scan period that touching the infrared tube sequence number blocked is recorded in block information array blindnum [led_num],
When the continuous touch of the infrared tube of serial number bn is blocked record number of times and exceeded limit value covertime, judge this pipe due to itself
Damage or foreign matter blocks and becomes fault pipe, be recorded into dead point information array badnum [sum] by touching dead point sequence number
.badno in.
A2, tiltedly scanned the fault type to judge fault pipe, fault type using the adjacent infrared tube of fault pipe
Including: infrared transmitting tube is bad, infrared receiving tube is bad, infrared tube all damages.
Described a2 walks particularly as follows: judging that its fault type is as follows to the fault pipe of serial number bn in step a1: judges
When whether being that infrared transmitting tube damages, light the adjacent infrared transmitting tube of serial number bn-1 and bn+1 respectively, if serial number bn
Infrared receiving tube have response magnitude of voltage, then be judged to infrared transmitting tube damage, be otherwise judged to that infrared transmitting tube does not damage；Sentence
Fixed light the infrared transmitting tube of serial number bn when whether being that infrared receiving tube damages, if serial number bn-1 and bn+1's is infrared
Reception pipe at least one have response magnitude of voltage, then be judged to infrared receiving tube damage, be otherwise judged to that infrared receiving tube does not damage；
If above-mentioned two condition is damage to the judgement of infrared transmitting tube and infrared receiving tube, judge the infrared emission of serial number bn
Pipe and infrared receiving tube all damage, and fault type is recorded in information array badnum [bn] .badtype of dead point.
A kind of infrared touch panel dead point self-adapting compensation method, specifically comprises the following steps that
B1, to the infrared tube detecting into touch dead point, set up dead point compensated scanning flow process, using periphery minimum distance
Normal pipe substitutes this fault pipe, compensates the touch scanning of dead-centre position using oblique scan mode.
Described b1 step is particularly as follows: according to fault pipe sequence number bn and fault type badnum [bn] .badtype, set up dead
Point compensated scanning flow process, and compensated scanning flow process in dead point is proceeded to by normal scan flow process；In this dead point compensated scanning flow process, to event
Barrier pipe bn is substituted using the normal work infrared tube of periphery, and even infrared transmitting tube damages, when scanning serial number bn
During fault pipe, then find distance on this infrared transmitting tube both sides and can have influence on less than launch angle α of single infrared transmitting tube
Apart from covdist, and the nearest infrared transmitting tube of distance fault pipe substitutes this fault pipe and is lighted, and dead point afterwards
To determine whether there is touch using oblique scan mode in compensated scanning flow process to block；In the same manner, damage if infrared receiving tube occurs
Substitute as stated above；If the type of fault pipe bn is infrared transmitting tube and reception pipe is all damaged, in dead point compensated scanning stream
Reject the scanning of the infrared tube of serial number bn in journey, do not carry out touch and block judgement.
B2, it is all to damage to the fault type having detected, and sequence number continuously multiple infrared tubes, it is judged to foreign matter region
Disable range, foreign matter region is eliminated scanning process, shields the touch of this region and blocks judgement.
Described b2 step is particularly as follows: there is the fault type of multipair continuous infrared tube to be infrared transmitting tube in horizontal and vertical
When all damaging with infrared receiving tube, it is considered as having foreign matter to enter in touch area, compensated scanning flow process in dead point is rejected serial number
The scanning of the infrared tube of bn, does not carry out touch and blocks judgement, thus the touch shielding this foreign matter region disable range is blocked
Judge, other regions enable range can be normally carried out touch and block judgement, and keeps the touch of infrared touch panel to divide
Resolution is constant.
A kind of infrared touch panel dead point information Store and update method, comprising:
C, will the touch that obtain dead point information array badnum [sum] write microprocessor flash in store, red every time
Reading dead point information from flash after outer touch-screen start, if there is dead point, initializing dead point compensated scanning flow process, thus keeping away
Exempt to repeat already present fault pipe is judged；Meanwhile, when identifying new dead point in infrared touch panel normal work, more
Dead point information array badnum [sum] in new flash.
When d, start and carry out dead point every some cycles in normal work and reject scanning process, recover repaired event
Barrier pipe and the foreign matter region removing.
Described d step is particularly as follows: every certain number of times countnum's when infrared touch panel is started shooting and in normal work
Scan period t carries out a dead point and rejects scanning process to the dead point of storage in flash, and scan mode is equal to normal scan stream
Journey, whether the response magnitude of voltage according to infrared receiving tube is normally judging whether fault pipe is fixed or whether foreign matter has moved
Go out touch area；If it is determined that result is yes, reverts to touching dead point normal operation mode and update the dead point information in flash
Array badnum [sum]；If it is determined that result is no then it is assumed that fault Guan Wei is fixed or foreign matter does not move out touch area, no
Dead point information array badnum [sum] is updated.
Beneficial effect:
1st, the present invention all can identify emerging touch extremely in infrared touch panel start and normal work in real time
The fault pipe sequence number of point, fault type and be whether that foreign matter enters touch area and causes to block.
2nd, the present invention adopts adaptive compensation mechanism, adopts oblique scan mode normal pipe to substitute event according to fault type
Barrier pipe is scanned, and eliminates and touches showing of loss of significance because the resolution ratio caused by dead point reduces with mistaken touch, touch skew etc.
As increased the job stability of infrared touch panel, extend its service life simultaneously.
3rd, the present invention, when fault pipe is fixed or foreign matter removes touch area, can identify that dead point can be just in real time
Often work, this dead point is reverted to normal operation mode.
4th, the present invention need not be redesigned to the hardware circuit of infrared touch panel and be changed it is only necessary to update infrared touch
In screen, the software firmware of microprocessor can achieve.
Brief description
Fig. 1 is the detection of infrared touch panel dead point and adaptive equalization schematic diagram；
Fig. 2 is shielding foreign matter area schematic.
Specific embodiment
Below in conjunction with Fig. 1 and Fig. 2, an embodiment of the present invention is described in detail.
A1, infrared touch panel normal work, the scan period is t, dead point detection cycle badchecktime=countnum*
Covertime*t, block information array is blindnum [led_num], and wherein countnum is to carry out touching blocking position note
The interval times of record, during enforcement, its span is 200 1000 taking t=10ms as a example；The screening that covertime judges for dead point
Gear frequency threshold value, during enforcement, its span is 10 150；Led_num is the total quantity of infrared touch panel infrared tube.
A11, every countnum scan period, the infrared tube sequence number of current touch blocking position is recorded into and blocks letter
In breath array blindnum [led_num], corresponding sequence number is blocked number of times and is added 1 operation, and detects in array and whether there is
The condition of blindnum [led_num] > covertime is set up.
If a12 blindnum [a] > covertime, judge serial number a infrared tube due to itself damage or
Foreign matter blocks and becomes fault pipe, and sequence number a is recorded into badnum [sum] .badno=a in the information array of dead point.Wherein sum is
Dead point total quantity, a is the infrared tube sequence number of Fig. 1 mid-infrared transmitting tube ta and infrared receiving tube ra.
A2, using serial number b and e adjacent infrared tube, judge the fault pipe of serial number a using oblique scan mode therefore
Barrier type is damaged for infrared transmitting tube ta, infrared receiving tube ra damages or ta and ra all damages, and the dotted line in Fig. 1 represents tiltedly to be swept
Retouch mode.
When whether a21, judgement infrared transmitting tube ta damage, light infrared transmitting tube tb, received using infrared receiving tube ra
IR, response magnitude of voltage is vtbra；Light infrared transmitting tube te, receive IR, response using infrared receiving tube ra
Magnitude of voltage is vtera.As vtbra > in bldvolth and vtera > bldvolth two condition during at least one establishment, infrared emission
Pipe ta is judged to not damage；When two conditions are all false, infrared transmitting tube ta is judged to damage, and fault type is tbad.Wherein
Bldvolth blocks decision threshold for infrared receiving tube response voltage.
When whether a22, judgement infrared receiving tube ra damage, light infrared transmitting tube ta, received using infrared receiving tube rb
IR, response magnitude of voltage is vtarb；Light infrared transmitting tube ta, receive IR, response using infrared receiving tube re
Magnitude of voltage is vtare.As vtarb > in bldvolth and vtare > bldvolth two condition during at least one establishment, infrared receiver
Pipe ra is judged to not damage；When two conditions are all false, infrared transmitting tube ra is judged to damage, and fault type is rbad.
A23, when a21, a22 step all judges to damage, the infrared tube fault type of serial number a is allbad.
A24, the result according to a21, a22, a23 step, the fault type of the fault pipe of serial number a is stored in dead point Information Number
In group, badnum [sum] .badtype=tbad rbad allbad.
B1, set up dead point compensated scanning flow process, the normal pipe using periphery minimum distance substitutes fault pipe, scanned using oblique
Scanning is blocked in the touch that mode compensates dead-centre position.
Calculated by the angle of departure α of infrared transmitting tube substitute pipe and the maximum of fault pipe can receive spacing covdistx and
Covdisty, as shown in figure 1, horizontal covdistx=tan (α) * ywidth, longitudinal covdisty=tan (α) * xwidth, wherein
The horizontal and vertical width of xwidth and ywidth difference infrared touch panel.According to dead point information array badnum [sum], logarithm
Dead point in group carries out adaptive equalization successively, specifically in the following several ways:
If fault pipe badnum [sum] .badtype=tbad of b11 serial number a, that is, infrared transmitting tube damages, then distinguish
Search sequence number e, f ... to the left side and the infrared tube of sequence number b, c ... is searched on the right, lookup stop condition is the normal work of infrared tube
Make, or infrared tube is in badnum [sum], but badnum [sum] .badtype=rbad, or search distance and exceed
covdistx.Such as find infrared tube badnum [sum] .badtype=allbad/tbad of serial number e to the left side, then
Continue to search for the infrared tube of serial number f, infrared tube f in badnum [sum], is not normal pipe, then stop searching, the left side
Substitute pipe and be set as tf；Then proceed to the right search, the infrared tube finding serial number b not in badnum [sum], then
The right substitutes pipe and is set as tb.Then compare the distance of tf, tb and ta, chosen distance less infrared transmitting tube tb substitutes and damages
Ta, in dead point compensated scanning flow process, the infrared tube position of sequence number a is lighted using infrared transmitting tube tb, infrared receiver
Pipe ra receives mode come the scan mode to substitute normal ta transmitting, ra receives.
If fault pipe badnum [sum] .badtype=rbad of b12 serial number h, that is, infrared receiving tube rh damages, then divide
Do not search sequence number i, j ... and the following infrared tube searching sequence number l, m ... to top, searching stop condition is that infrared tube is normal
Work, or infrared tube is in badnum [sum], but badnum [sum] .badtype=tbad, or it is super to search distance
Cross covdisty.Search alternative identical with b11 step.
If fault pipe badnum [sum] .badtype=allbad of b13 serial number e, i.e. infrared transmitting tube te and infrared
Reception pipe re is all damaged, then cannot ensure to touch precision using oblique scanning alternative, so in dead point compensated scanning flow process
Middle the position of serial number e is set to not scan.
B14, being located at four corner edge infrared tubes of touch-screen in b11, b12 step, to substitute pipe search directions infrared to exist
Pipe direction is defined.Select to substitute pipe judge apart from when, the right and left then selects left side pipe to substitute apart from identical, upper and lower both sides
Apart from identical, following pipe is selected to substitute, the heavy line in Fig. 1 represents the oblique scan mode of replacement.
If in the information array of b2 dead point the infrared tube quantity of badnum [sum] .badtype=allbad laterally or
Longitudinally more than 3, as shown in Fig. 2 badnum [sum] .badno be laterally consecutive sequence number from a to d, be longitudinally continuous sequence number from n to
L, then be determined with foreign matter entrance touch area and block.Compensated scanning flow process in dead point walks above-mentioned continuous dead point according to b13
Position is both configured to not scan, this foreign matter region disable range, such as Fig. 2, is defaulted as no touch and blocks, then touching screening
Gear can shield the impact in this foreign matter region in judging, other touch areas are normal touch region enable range, such as scheme
2, normal touch can be carried out and block scanning, so can ensure that the touch resolution ratio in other regions of screen is constant.
C, touch dead point information array badnum [sum] determining a1, a2 step write the scan control of infrared touch panel
Store in the flash of microprocessor.
After c1, infrared touch panel are started shooting every time, read dead point information array badnum [sum] from flash, if sum > 0,
Then carry out 3 dead point compensated scanning flow process initial work according to dead point information, avoiding starting shooting every time all repeats dead point and sentence
Disconnected, ensure that the infrared touch panel that there is dead point can normally use after each start simultaneously.
When c2, infrared touch panel normal work, when identifying new dead point in a1, a2 step, update badnum's [sum]
Up-to-date badnum [sum] is stored in the flash of microprocessor simultaneously.
D, carry out dead point at regular intervals and reject scanning process, recover repaired fault pipe and the foreign matter area removing
Domain.
D1, when infrared touch panel is started shooting, carry out dead point reject scanning process.Read in c step and be stored in flash's
Badnum [sum] array, using normal scan flow process, such as in array, the fault pipe of serial number a, lights infrared transmitting tube to it
Ta, receives mode with infrared receiving tube ra and is scanned, if response magnitude of voltage vtara > bldvolth, judges serial number a
Fault pipe fixed, it is removed from dead point information array badnum [sum], recovery a position be normal scan, and
Update the badnum [sum] of storage in flash.When in badnum [sum], continuous fault Guan Jun of sequence number is removed, it is judged to
Foreign matter removes touch area, and the foreign matter region recovering shielding is normal scan.
D2, in infrared touch panel normal work, often the time through countnum*t carry out the dead point of d1 step and pick
Except scanning process, can identify that dead point is recovered and foreign matter removes touch area in real time, update badnum [sum] array and dead
Point compensated scanning flow process, updates flash information simultaneously.
E, infrared touch panel reach during normal work dead point detection cycle badchecktime in start or often, carry out
A1 step, if the sum of badnum [sum] array increases in a1 step, indicates new fault pipe appearance, carry out a2, b1,
B2, c walk.
Claims (9)
1. a kind of infrared touch panel dead point intelligent identification Method, step is as follows:
In a1, infrared touch panel normal work, continuous touch of statistics each pair infrared tube blocks number of times, at regular intervals according to system
Meter information judge in this time period all the time by touch block as fault pipe, be identified as touching dead point, it is characterized in that, described a1
Step is particularly as follows: in infrared touch panel course of normal operation, judge in countnum scan period t is by present scanning cycle
It is recorded in block information array blindnum [led_num] for touching the infrared tube sequence number blocked, infrared when serial number bn
Pipe is continuous to be touched when blocking record number of times and exceeding limit value covertime, judges that this pipe is damaged due to itself or foreign matter blocks
And become fault pipe, it is recorded into touching dead point sequence number in information array badnum [sum] .badno of dead point.
2. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 1, is characterized in that, also include: a2, utilization
The adjacent infrared tube of fault pipe is tiltedly scanned the fault type to judge fault pipe, and fault type includes: infrared transmitting tube
Bad, infrared receiving tube is bad, infrared tube all damages.
3. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 2, is characterized in that, described a2 step is concrete
For: its fault type is as follows to be judged to the fault pipe of serial number bn in step a1: when determining whether infrared transmitting tube damage,
Light the adjacent infrared transmitting tube of serial number bn-1 and bn+1 respectively, if the infrared receiving tube of serial number bn has response voltage
Value, then be judged to that infrared transmitting tube damages, be otherwise judged to that infrared transmitting tube does not damage；Determine whether infrared receiving tube to damage
When, light the infrared transmitting tube of serial number bn, if the infrared receiving tube of serial number bn-1 and bn+1 at least one have response electricity
Pressure value, then be judged to that infrared receiving tube damages, be otherwise judged to that infrared receiving tube does not damage；If above-mentioned two condition is to infrared
Penetrate pipe and the judgement of infrared receiving tube be damage, then judge that the infrared transmitting tube of serial number bn and infrared receiving tube all damage,
Fault type is recorded in information array badnum [bn] .badtype of dead point.
4. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 3, is characterized in that, infrared touch panel dead point
The step of self-adapting compensation method is as follows:
B1, to the infrared tube detecting into touch dead point, set up dead point compensated scanning flow process, normal using periphery minimum distance
Pipe substitutes this fault infrared tube, compensates the touch scanning of dead-centre position using oblique scan mode.
5. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 4, is characterized in that, described b1 step is concrete
For: according to fault pipe sequence number bn and fault type badnum [bn] .badtype, set up dead point compensated scanning flow process, and by normal
Scanning process proceeds to dead point compensated scanning flow process；In this dead point compensated scanning flow process, fault pipe bn is adopted with the normal work of periphery
Substituted as infrared tube, even infrared transmitting tube damages, when scanning the fault pipe of serial number bn, then in this infrared emission
Pipe both sides find distance less than launch angle α of single infrared transmitting tube can have influence on apart from covdist, and distance fault
The nearest infrared transmitting tube of pipe substitutes this fault pipe and is lighted, and is scanned using oblique in dead point compensated scanning flow process afterwards
Mode is blocked determining whether there is touch；In the same manner, also substitute as stated above if infrared receiving tube occurring and damaging；If fault pipe bn
Type be that infrared transmitting tube and reception pipe are all damaged, then reject the infrared tube of serial number bn in dead point compensated scanning flow process
Scanning, does not carry out touch and blocks judgement.
6. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 5, is characterized in that, also include: b2, to
The fault type detecting is all to damage, and sequence number continuously multiple infrared tubes, is judged to foreign matter region disable range,
Foreign matter region is eliminated scanning process, shields the touch of this region and block judgement.
7. a kind of infrared touch panel dead point intelligent identification Method as claimed in claim 6, is characterized in that, described b2 step is concrete
For: when to have the fault type of multipair continuous infrared tube in horizontal and vertical be that infrared transmitting tube and infrared receiving tube all damage,
It is considered as the scanning having foreign matter to enter the infrared tube rejecting serial number bn in touch area in dead point compensated scanning flow process, do not enter
Judgement is blocked in row touch, thus judgement is blocked in the touch shielding this foreign matter region disable range, other regions enable
Range can be normally carried out touch and block judgement, and keep infrared touch panel touch resolution ratio constant.
8. a kind of infrared touch panel dead point information Store and update method, is characterized in that, comprising:
Deposit in c, the flash of touch dead point information array badnum [sum] write microprocessor that claim 1-3 is obtained
Storage, reading dead point information from flash after each infrared touch panel start, if there is dead point, initializing dead point compensated scanning stream
Journey, thus avoid repeating already present fault pipe is judged；Meanwhile, identify in infrared touch panel normal work new
During dead point, update dead point information array badnum [sum] in flash.
9. a kind of infrared touch panel dead point information Store and update method as claimed in claim 8, is characterized in that, when d, start
Reject scanning process with carrying out dead point every some cycles in normal work, recover repaired fault pipe and the foreign matter removing
Region, particularly as follows: every scan period t pair of certain number of times countnum when infrared touch panel is started shooting and in normal work
In flash, the dead point of storage carries out a dead point rejecting scanning process, and scan mode is equal to normal scan flow process, according to infrared
Whether the response magnitude of voltage of reception pipe normally judges whether fault pipe is fixed or whether foreign matter has moved out touch area；
If it is determined that result is yes, reverts to touching dead point normal operation mode and update dead point information array badnum in flash
[sum]；If it is determined that result is no then it is assumed that fault Guan Wei is fixed or foreign matter does not move out touch area, not to dead point information
Array badnum [sum] is updated.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104182092B (en) * | 2014-08-04 | 2017-03-29 | 深圳市巨浪科教设备有限公司 | Infrared touch screen positioning method and system |
| CN106201064B (en) * | 2016-06-24 | 2019-07-09 | 青岛海信电器股份有限公司 | Touch localization method, device and touch screen |
| CN106770815B (en) * | 2016-11-24 | 2019-10-11 | 浙江三雷模塑有限公司 | Touch-control optimization method and device suitable for terminal device |
| CN107291306A (en) * | 2017-06-23 | 2017-10-24 | 努比亚技术有限公司 | A kind of touch detecting method and terminal |
| CN107506073B (en) * | 2017-08-08 | 2020-05-05 | 维沃移动通信有限公司 | Touch screen detection method and device, mobile terminal and computer readable storage medium |
| CN112445380B (en) * | 2020-12-08 | 2022-04-01 | 安徽鸿程光电有限公司 | Infrared touch control method, device and all-in-one machine |
| CN113867568B (en) * | 2021-09-29 | 2023-10-13 | 四川长虹教育科技有限公司 | Method for dynamically detecting and repairing infrared touch by infrared interaction large screen |
| CN114201079B (en) * | 2021-12-06 | 2023-09-22 | 苏州长风航空电子有限公司 | Reliability verification method and system for infrared touch screen |
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