CN104142759A - Light path detection method and system of infrared touch screen - Google Patents
Light path detection method and system of infrared touch screen Download PDFInfo
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- CN104142759A CN104142759A CN201310164425.1A CN201310164425A CN104142759A CN 104142759 A CN104142759 A CN 104142759A CN 201310164425 A CN201310164425 A CN 201310164425A CN 104142759 A CN104142759 A CN 104142759A
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Abstract
The invention relates to a light path detection method and system of an infrared touch screen. The detection method comprises the following steps: acquiring light intensity value of each scanning light path of the infrared touch screen; comparing the acquired light intensity value of each scanning light path with a preset threshold value; displaying the scanning light path by the first mode when the light intensity value of the scanning light is more than the preset threshold; displaying the scanning light path by the second mode when the light intensity value of the scanning light path is not greater than the preset threshold; shielding all scanning light paths of the infrared screen at the same time or in sequence; determining whether each scanning light path is displayed by the first mode or the second mode while being shielded; if the first mode is adopted, determining that the scanning light path works normally; if the second mode is adopted, determining that the scanning light path works abnormally. With the adoption of the detection method and system, the abnormally-worked scanning light paths of the infrared touch screen can be quickly detected, thus the testing efficiency can be greatly raised, and the manual testing operation is simplified.
Description
Technical field
The present invention relates to a kind of light path detection method of touch-screen, specifically a kind of light path detection method and system of infrared touch panel, belongs to touch-screen detection technique field.
Background technology
Along with the development of touching technique, touch-screen as one simply and easily human-computer interaction device be used widely.At present, the kind of touch-screen mainly comprises resistive touch screen, capacitive touch screen, surface acoustic wave touch screen, optical touch screen and infrared touch panel etc.For resistive touch screen and capacitive touch screen, infrared touch panel has advantages such as not being subject to electric current, voltage and electrostatic interference, suitable rugged environment condition, and the range of application of infrared touch panel is wider.
Infrared touch panel is to utilize infrared ray matrix densely covered in X, Y-direction to detect the also touch operation of consumer positioning, surrounding at infrared touch panel is installed a circuit board housing, circuit board housing four limits arrange infrared emission component and infrared receiver component, infrared emission component and any one infrared receiver component of opposite side form one group of infrared tube.Infrared emission component transmitting infrared light in one group of infrared tube, as the infrared receiver component in this group infrared tube receives this infrared light, explanation does not touch, otherwise infrared light is blocked and judges and have touch.User is in the time of touch screen, and the touch objects such as finger are blocked at least two infrared rays anyhow through this position, judges the position of touch point on screen by detecting the state of every group of infrared tube.Usually, infrared receiver component can be quantized into a light intensity value detecting when these infrared lights, judges whether infrared light is blocked, thereby judge the break-make situation of scanning optical path by the size of comparing this light intensity value and default threshold value; Therefore, threshold value choose the judgement of scanning optical path break-make situation most important.In the ideal situation, in the time that infrared light is not blocked, light intensity value reaches a fixed value, is called standard of luminous intensity value; In the time that infrared light is blocked, light intensity value can reduce to zero.So, only need get one zero to the numerical value between standard of luminous intensity value as threshold value, judge the break-make of scanning optical path with this threshold value: when light intensity value is during higher than threshold value, scanning optical path is for logical; When light intensity value is during lower than threshold value, scanning optical path is for disconnected.
But infrared touch panel uses in actual environment, due to disturbing factors such as the noises in surround lighting, circuit, makes in the time that infrared light is blocked, light intensity value is non-vanishing, sometimes also can be very large.If threshold value is still according to arbitrarily choosing under perfect condition, the threshold value of choosing may be less than the light intensity value in environment for use, and then in the time that infrared light is blocked, still judge that scanning optical path is path, cause testing result to be made mistakes, thereby affect the judgement of position, touch point.Therefore, choosing of threshold value also needs to consider the light intensity value in environment for use, can not only arbitrarily choose according to perfect condition.
The light intensity value existing when infrared light is blocked is actually noise generation, in the time that noise is too large, can make testing result make mistakes, thereby affect the judgement of position, touch point, therefore, still larger infrared light of light intensity value after must detecting these and being blocked, and carry out analyzing and processing.Owing to just can obtain existing when these are blocked the infrared light of light intensity value in the situation that being blocked, therefore must obtain by the mode of manual intervention.
The mode of the light intensity value in existing detection environment for use is generally: first, on the circuit board of infrared touch panel, Infrared signals all in infrared touch panel is drawn and received on oscillograph, check each Infrared by oscillograph.The in the situation that of no touch, check the light intensity value of infrared light in the time not being blocked; Then touch and shelter from corresponding infrared light, check light intensity value when infrared light is blocked; If light intensity value when one infrared light is blocked is greater than threshold value, illustrate that corresponding light path noise is too large, need to carry out analyzing and processing.
Although above-mentioned detection mode can detect the light intensity value of infrared light, because infrared light is very many, be hundreds of to several thousand, therefore use this detection mode to check that whole infrared lights waste time and energy; And, although above-mentioned detection mode has detected the light intensity value that noise produces,, be also not easy accurately to navigate to infrared emission component and the infrared receiver component that this light intensity value is corresponding, and then cannot carry out next step analyzing and processing.
Summary of the invention
Technical matters to be solved by this invention is the technical matters that the light path detection method of infrared touch panel in prior art wastes time and energy, thereby a kind of light path detection method and system of high efficiency infrared touch panel are provided.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A light path detection method for infrared touch panel, comprises the steps:
S1: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
S2: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
Described light path detection method, described step S2 further comprises:
S211: block successively each described scanning optical path of infrared screen, meanwhile, gather the light intensity value of all described scanning optical paths;
S212: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
Described light path detection method, described step S2 further comprises:
S221: by all light path set of described scanning optical path composition;
S222: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
S223: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
Described light path detection method, described light intensity value comprises the light intensity value size of infrared emission component numbering, infrared receiver component numbering and this scanning optical path of each described scanning optical path; After described step S2, also further comprise the light intensity value size of the abnormal described scanning optical path of output services.
Described light path detection method, after described step S2, is also further included in the step of the abnormal described scanning optical path of shielding work in the process of locating touch point.
Described light path detection method, after described step S2, also further comprise the steps: progressively to increase described predetermined threshold value, until all described light intensity value of the scanning optical path collecting is all less than or equal to the described predetermined threshold value after increase, the described predetermined threshold value after increasing is as new predetermined threshold value.
Described light path detection method, abnormal described scanning optical path of working shows with the first color, described scanning optical path working properly shows with the second color that is different from described the first color.
Described light path detection method, abnormal described scanning optical path of working shows with the first brightness, described scanning optical path working properly shows with the second brightness that is different from described the first brightness.
A light path detection for infrared touch panel, comprising:
Comparison module: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
Judge module: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
Described light path detection, described judge module further comprises:
Gather submodule: block successively each described scanning optical path of infrared screen, meanwhile, gather the light intensity value of all described scanning optical paths;
First relatively judges submodule: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
Described light path detection, described judge module further comprises:
Submodule is obtained in light path set: by all light path set of described scanning optical path composition;
Second relatively judges submodule: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
The 3rd relatively judges submodule: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
Described light path detection, described light intensity value comprises the light intensity value size of infrared emission component numbering, infrared receiver component numbering and this scanning optical path of each described scanning optical path; Described judge module also further comprises the output sub-module of the light intensity value size of the abnormal described scanning optical path of output services.
Described light path detection, described judge module is also further included in the shielding submodule of the abnormal described scanning optical path of shielding work in the process of locating touch point.
Described light path detection, described judge module also further comprises and progressively increases described predetermined threshold value, until all described light intensity value of the scanning optical path collecting is all less than or equal to the described predetermined threshold value after increase, the described predetermined threshold value after increasing is obtained submodule as the new predetermined threshold value of new predetermined threshold value.
Described light path detection, abnormal described scanning optical path of working shows with the first color, described scanning optical path working properly shows with the second color that is different from described the first color.
Described light path detection, abnormal described scanning optical path of working shows with the first brightness, described scanning optical path working properly shows with the second brightness that is different from described the first brightness.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) light path detection method and the system of infrared touch panel of the present invention, this light path detection method comprises the steps: S1: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method; S2: simultaneously or block successively all described scanning optical path of infrared touch panel, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
First, gather the light intensity value of all scanning optical paths of infrared touch panel, the light intensity value of each scanning optical path and predetermined threshold value are compared, if the light intensity value of this scanning optical path is greater than and predetermined threshold value, show this scanning optical path with first method, otherwise, show this scanning optical path with second method; Then, simultaneously or block successively all described scanning optical path of infrared touch panel, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.This light path detection method and system can detect the abnormal scanning optical path of work in infrared touch panel very rapidly, have improved greatly testing efficiency, have simplified manual testing's operation.
(2) light path detection method and the system of infrared touch panel of the present invention, obtain the infrared emission component numbering of the abnormal described scanning optical path of the large work of noise, infrared receiver component numbering and light intensity value size output, supply with maintenance personal uses in the time of maintenance, maintenance personal can judge whether it is infrared emission component corresponding to described scanning optical path that circuit or noise are large by these information, infrared receiver component breaks down, or noise is excessive, find early fault, sensor failure, corner is reflective, and (Infrared of sending near the radiated element of touch-screen frame can be reflected by light transmission strip on frame, the received element of reflected light receives, in this case, even if touch objects has been blocked the scanning optical path between radiated element and receiving element, also likely because entering receiving element, reflected light make the light intensity of receiving element reception larger, produce larger noise) etc. problem, be convenient to maintenance.
(3) light path detection method and the system of infrared touch panel of the present invention, in the process of touch point, location, carry out shielding processing for the abnormal scanning optical path of work, in calculating touch point coordinate, do not consider the scanning optical path of conductively-closed, improve accuracy rate and the accuracy of identification of identification.
(4) light path detection method and the system of infrared touch panel of the present invention, progressively increase predetermined threshold value, until the minimum intensity of light value of the scanning optical path collecting is all less than or equal to the predetermined threshold value after increase, this predetermined threshold value after increasing is as up-to-date predetermined threshold value; This noise amplitude that can reflect infrared touch panel according to the new predetermined threshold value of noise amplitude Rational choice, improves accuracy rate and the accuracy of identification of identification.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the process flow diagram of the light path detection method of infrared touch panel of the present invention.
Embodiment
The light path detection method of infrared touch panel of the present invention, as shown in Figure 1, comprises the steps:
S1: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
In the present embodiment, abnormal described scanning optical path of working shows with the first color, and described scanning optical path working properly shows with the second color that is different from described the first color.For example, abnormal described scanning optical path of working is with black display, and described scanning optical path working properly is with white displays, and abnormal described scanning optical path possibility noise of working is too large, needs to process.
As other embodiments, abnormal described scanning optical path of working shows with the first brightness, and described scanning optical path working properly shows with the second brightness that is different from described the first brightness.For example, abnormal described scanning optical path of working shows with high brightness, and described scanning optical path working properly shows with low-light level.
Certainly, described scanning optical path working properly and the abnormal described scanning optical path of work also can be distinguished by other modes, for example, distinguish by different pattern, do not repeat them here.
S2: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
According to one preferred embodiment, described step S2 can comprise:
S211: block successively each scanning optical path of infrared touch panel, meanwhile, gather the light intensity value information of all scanning optical paths.Preferably, the described light intensity value information of collection comprises the light intensity value of infrared emission component numbering and infrared receiver component numbering and this infrared scan light path of each scanning optical path.
For example, can enclose along the painting on picture frame one of infrared touch panel with finger or felt pen, this operation can realize every scanning optical path and all be blocked.Then can gather by the host computer being connected with infrared touch panel the light intensity value of each scanning optical path.Wherein, each infrared receiving tube of infrared touch panel can receive each the infrared light in scanning optical path, the infrared light simulating signal that each infrared receiving tube receives can convert the digital signal that represents light intensity value to by the control chip of infrared touch panel, control chip is transferred to this light intensity value the host computer being connected with infrared touch panel, thereby host computer can collect the light intensity value of each scanning optical path.
S212: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
According to another kind of embodiment, for described step S2, further comprise:
S221: by all light path set of described scanning optical path composition;
S222: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
S223: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
Obtain by the following method described predetermined threshold value: the standard of luminous intensity value that gathers infrared touch panel every scanning optical path in the time not touching, under perfect condition, the standard of luminous intensity value of every scanning optical path of infrared screen equates, in actual environment, can there is a little difference, so described threshold value is 1/2nd of minimum standard of luminous intensity value.
Preferably, the light path detection method of this infrared touch panel can also comprise step S3: infrared emission component numbering, infrared receiver component numbering and the light intensity value size of the described scanning optical path that output noise is large.
The present embodiment, this light path detection method is embedded in host computer, infrared touch panel is accessed to host computer, apply this method of testing, can obtain along painting on picture frame one circle of infrared touch panel the scanning optical path that noise is large with finger or felt pen, with respect to classic method, this light path detection method need not be facing to the observation of a light path of a light path of oscillograph, can detect very easily the noise of infrared touch panel, accurately navigate to any bar scanning optical path and have problem, convenient further processing, has improved testing efficiency greatly, has simplified manual testing's operation.
Further, due to human factor, in the process of drawing a circle, some scanning optical path of possibility does not block and is mistaken for the scanning optical path that noise is large, so, for the large scanning optical path of noise, can block again, if light intensity value when it blocks cannot block below described predetermined threshold value really, can judge that this scanning optical path noise is too large, need further process.
In the present embodiment, the infrared emission component numbering of the described scanning optical path that output noise is large, infrared receiver component numbering and light intensity value size, supply with maintenance personal uses in the time of maintenance, maintenance personal can judge whether it is radiated element by these information, receiving element or circuit break down, or noise is excessive, find early fault, sensor failure, corner is reflective, and (Infrared of sending near the radiated element of touch-screen frame can be reflected by light transmission strip on frame, the received element of reflected light receives, in this case, even if touch objects has been blocked the scanning optical path between radiated element and receiving element, also likely because entering receiving element, reflected light make the light intensity of receiving element reception larger, produce larger noise) etc. problem, be convenient to maintenance.
As other embodiments, in the process of touch point, location, after obtaining its infrared emission component numbering, infrared receiver component numbering for the large scanning optical path of noise, carry out shielding processing, in calculating touch point coordinate, do not consider the scanning optical path of conductively-closed, improve accuracy rate and the accuracy of identification of identification.
As other embodiments, progressively increase predetermined threshold value, until the minimum intensity of light value of the scanning optical path collecting is all less than or equal to the predetermined threshold value after increase, this predetermined threshold value after increasing is as new predetermined threshold value; This new predetermined threshold value can reflect the noise amplitude of touch-screen, improves accuracy rate and the accuracy of identification of identification.
The light path detection of a kind of infrared touch panel of the present invention, comprising:
Comparison module: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
Judge module: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
Described light path detection, described judge module further comprises:
Gather submodule: block successively each described scanning optical path of infrared screen, meanwhile, gather the light intensity value of all described scanning optical paths;
First relatively judges submodule: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
Described light path detection, described judge module further comprises:
Submodule is obtained in light path set: by all light path set of described scanning optical path composition;
Second relatively judges submodule: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
The 3rd relatively judges submodule: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
Described light path detection, described light intensity value comprises the light intensity value size of infrared emission component numbering, infrared receiver component numbering and this scanning optical path of each described scanning optical path; Described judge module also further comprises the output sub-module of the light intensity value size of the abnormal described scanning optical path of output services.
Described light path detection, described judge module is also further included in the shielding submodule of the abnormal described scanning optical path of shielding work in the process of locating touch point.
Described light path detection, described judge module also further comprises and progressively increases described predetermined threshold value, until all described light intensity value of the scanning optical path collecting is all less than or equal to the described predetermined threshold value after increase, the described predetermined threshold value after increasing is obtained submodule as the new predetermined threshold value of new predetermined threshold value.
Described light path detection, abnormal described scanning optical path of working shows with the first color, described scanning optical path working properly shows with the second color that is different from described the first color.
Described light path detection, abnormal described scanning optical path of working shows with the first brightness, described scanning optical path working properly shows with the second brightness that is different from described the first brightness.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being extended out thus or variation are still among the protection domain in the invention.
Claims (16)
1. a light path detection method for infrared touch panel, is characterized in that, comprises the steps:
S1: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
S2: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
2. light path detection method according to claim 1, is characterized in that, described step S2 further comprises:
S211: block successively each described scanning optical path of infrared screen, meanwhile, gather the light intensity value of all described scanning optical paths;
S212: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
3. light path detection method according to claim 1, is characterized in that, described step S2 further comprises:
S221: by all light path set of described scanning optical path composition;
S222: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
S223: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
4. according to the arbitrary described light path detection method of claim 1-3, it is characterized in that, described light intensity value comprises the light intensity value size of infrared emission component numbering, infrared receiver component numbering and this scanning optical path of each described scanning optical path; After described step S2, also further comprise the light intensity value size of the abnormal described scanning optical path of output services.
5. according to the arbitrary described light path detection method of claim 1-3, it is characterized in that, after described step S2, be also further included in the step of the abnormal described scanning optical path of shielding work in the process of locating touch point.
6. according to the arbitrary described light path detection method of claim 1-3, it is characterized in that, after described step S2, also further comprise the steps: progressively to increase described predetermined threshold value, until all described light intensity value of the scanning optical path collecting is all less than or equal to the described predetermined threshold value after increase, the described predetermined threshold value after increasing is as new predetermined threshold value.
7. according to the arbitrary described light path detection method of claim 1-6, it is characterized in that, abnormal described scanning optical path of working shows with the first color, and described scanning optical path working properly is to be different from the second color demonstration of described the first color.
8. according to the arbitrary described light path detection method of claim 1-6, it is characterized in that, abnormal described scanning optical path of working shows with the first brightness, and described scanning optical path working properly is to be different from the second brightness demonstration of described the first brightness.
9. a light path detection for infrared touch panel, is characterized in that, comprising:
Comparison module: the light intensity value that gathers each scanning optical path of infrared touch panel, and described light intensity value and the predetermined threshold value of each the described scanning optical path gathering are compared, in the time that the described light intensity value of described scanning optical path is greater than described predetermined threshold value, show this scanning optical path with first method, in the time that the described light intensity value of described scanning optical path is less than or equal to described predetermined threshold value, show this scanning optical path with second method;
Judge module: simultaneously or block successively all described scanning optical path of infrared screen, judge each described scanning optical path shown in the time being blocked be described first method or described second method, described second method if, judges that this scanning optical path is working properly; Described first method if, judges that this scanning optical path work is undesired.
10. light path detection according to claim 9, is characterized in that, described judge module further comprises:
Gather submodule: block successively each described scanning optical path of infrared screen, meanwhile, gather the light intensity value of all described scanning optical paths;
First relatively judges submodule: all described light intensity value and the predetermined threshold value of each the described scanning optical path collecting are compared, if there is a light intensity value that is less than or equal to described predetermined threshold value in all described light intensity value of this described scanning optical path, judge that this described scanning optical path is working properly; If all light intensity values of this described scanning optical path are all greater than described predetermined threshold value, judge that this described scanning optical path work is undesired.
11. light path detections according to claim 9, is characterized in that, described judge module further comprises:
Submodule is obtained in light path set: by all light path set of described scanning optical path composition;
Second relatively judges submodule: in the time collecting any described scanning optical path in described light path set light intensity value in the time being blocked and be less than or equal to described predetermined threshold value, judge that this scanning optical path is working properly, this scanning optical path is deleted from set;
The 3rd relatively judges submodule: after all described scanning optical paths are all blocked, if also have scanning optical path residue in described light path set, the light intensity value of remaining described scanning optical path in the time being blocked is greater than described predetermined threshold value, judges remaining described scanning optical path malfunction.
12. according to the arbitrary described light path detection of claim 9-11, it is characterized in that, described light intensity value comprises the light intensity value size of infrared emission component numbering, infrared receiver component numbering and this scanning optical path of each described scanning optical path; Described judge module also further comprises the output sub-module of the light intensity value size of the abnormal described scanning optical path of output services.
13. according to the arbitrary described light path detection of claim 9-11, it is characterized in that, described judge module is also further included in the shielding submodule of the abnormal described scanning optical path of shielding work in the process of locating touch point.
14. according to the arbitrary described light path detection of claim 9-11, it is characterized in that, described judge module also further comprises and progressively increases described predetermined threshold value, until all described light intensity value of the scanning optical path collecting is all less than or equal to the described predetermined threshold value after increase, the described predetermined threshold value after increasing is obtained submodule as the new predetermined threshold value of new predetermined threshold value.
15. according to the arbitrary described light path detection of claim 9-14, it is characterized in that, abnormal described scanning optical path of working shows with the first color, and described scanning optical path working properly is to be different from the second color demonstration of described the first color.
16. according to the arbitrary described light path detection of claim 9-14, it is characterized in that, abnormal described scanning optical path of working shows with the first brightness, and described scanning optical path working properly is to be different from the second brightness demonstration of described the first brightness.
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| CN201310164425.1A CN104142759A (en) | 2013-05-07 | 2013-05-07 | Light path detection method and system of infrared touch screen |
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Application publication date: 20141112 |