CN201425741Y - Digital capacitive touch screen - Google Patents
Digital capacitive touch screen Download PDFInfo
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- CN201425741Y CN201425741Y CN2009201526358U CN200920152635U CN201425741Y CN 201425741 Y CN201425741 Y CN 201425741Y CN 2009201526358 U CN2009201526358 U CN 2009201526358U CN 200920152635 U CN200920152635 U CN 200920152635U CN 201425741 Y CN201425741 Y CN 201425741Y
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Abstract
The utility model relates to a touch screen, particularly relates to a capacitive touch screen, and discloses a digital capacitive touch screen, which consists of a touch substrate, a touch circuit and the like. At least two intersected electrode groups are arranged on the touch substrate, each electrode line is connected to the touch circuit, portions of the electrode lines can be selected as detection electrodes every moment, touch signals are applied to the detection electrodes, changes of the touch signals on the detection electrode lines are detected, and simultaneously the touch signalsare applied to a non-detection electrode line. The digital capacitive touch screen is high in resolution ratio, large in size, simple in structure, low in cost and high in reliability.
Description
Technical field
The utility model relates to touch screen, relates in particular to capacitance type touch control screen.
Background technology
Touch is human most important perceptive mode, is that people and machine carry out the most natural interactive mode.The touch screen development has been widely used in various fields such as personal computer, smart phone, public information, intelligent appliance, Industry Control so far.In present touch-control field, mainly contain resistance type touch control screen, photo-electric touch screen, ultrasonic type touch screen, flat capacitance type touch screen, projective capacitive touch screen development in recent years is rapidly.
Resistance type touch control screen is still leading products in the market, but the structure of the double layer substrate of resistance type touch control screen, when making the use stacked together of touch screen and display panel, display qualities such as the brightness that the reflective very influence of touch screen shows, contrast, color saturation, whole display quality is descended greatly, and strengthen display panel brightness backlight, power consumption is risen sharply; Also there is the problem of location drift in analog resistance touch screen, will carry out position correction frequently; In addition, the working method of resistance type touch control screen electrode contact makes that again the life-span of touch screen is shorter.
Infrared-type touch screen and ultrasonic type touch screen can not influence display quality.But infrared-type touch screen and ultrasonic type touch screen cost height, water droplet and dust all can influence the reliability of touch screen work, particularly infrared-type touch screen and ultrasonic type touch screen mechanism complexity, power consumption are big, make infrared-type touch shield and the ultrasonic type touch screen can't be applied on the portable product substantially.
The structure of the single layer substrate of flat capacitance type touch screen, when making the use stacked together of touch screen and display panel, touch screen is little to the influence of display quality.But also there is the problem of location drift in the flat capacitance type touch screen, will carry out position correction frequently; Water droplet also can influence the reliability of touch screen work; Particularly flat capacitance type touch screen power consumption is big, cost is high, also allows the flat capacitance type touch screen can't be applied on the portable product substantially.
Projective capacitive touch shields still single layer substrate structure, and when also making the use stacked together of touch screen and display panel, touch screen is little to the influence of display quality.But the projective capacitive touch screen is not real digital touch screen, anchor point need pass through analog computation, distributed capacitance in manufacturing and the environment for use all can influence the reliability of touch screen work, the interference of display drive signals and other electric signal all can influence the work of touch screen, and water droplet also can influence the reliability of touch screen work; In addition, the projective capacitive touch screen has higher requirements to the resistance value aspect of exploring electrode line, the exploring electrode line that projective capacitive touch feasible and display panel use stacked together shields, can not have only low conductivity transparent electrode layer as the ITO sample, also will be just like the high conductivity electrode layer of metal species, manufacture technology complexity, cost height, particularly cost is too high aspect large scale even oversize touch screen.
The utility model content
The utility model is exactly in order to realize real high-resolution digital capacitive touch screen.The utility model is by the flow direction of control touching signals, and the minimizing touching signals is mobile in crosstalking between the detecting electrode and between detecting electrode and the non-detecting electrode, improves the accuracy that the utmost point that gets an electric shock is judged, really realizes digital capacitive touch screen.
Digital capacitive touch screen of the present utility model is determined the polar curve that gets an electric shock by the relative value that detects touching signals variable quantity on each strip electrode line, reduces the requirement to the resistance value aspect of electrode wires, realizes the capacitive touch screen of large scale even oversize.
Technical matters of the present utility model is solved by following technical scheme:
A kind of digital capacitive touch screen is made up of touch base plate and touch-control circuit etc.Touch base plate is provided with the electrode group that is no less than two sets intersect, and each strip electrode line connects touch-control circuit.Each selects many strip electrodes line as detecting electrode constantly, simultaneously many detecting electrode lines is applied touching signals, and detects the variation of touching signals on the many detecting electrode lines; Or each moment selection portion sub-electrode line when the detecting electrode line is applied touching signals and detects the variation of touching signals on the detecting electrode line, also applies touching signals to non-detecting electrode line as detecting electrode.
Technical matters of the present utility model is further solved by following technical scheme:
The described non-detecting electrode that applies touching signals is to connect in each strip electrode line of touch-control circuit non-detecting electrode or non-detecting electrode partly all except that detecting electrode.
It is to carry out in the mode of scanning that described touch-control circuit is selected detecting electrode, and the different moment select the electrode wires of different piece as detecting electrode.
Amplitude, phase place, frequency or the coding of the touching signals that applies on described each strip electrode are identical with amplitude, phase place, frequency or the coding of the touching signals that is applied on the described detecting electrode.
Amplitude, phase place, frequency or the coding of the touching signals that applies on described each strip electrode are different with in the amplitude of the touching signals that is applied on the described detecting electrode, phase place, frequency or the coding at least one.
Described touch-control circuit is not less than 50K Hz to the frequency of the touching signals of electrode wires output.
Touching signals on the described touch-control circuit detecting electrode line, detection be at least a in current signal and the voltage signal.
Touching signals on the described touch-control circuit detecting electrode line, detection be at least a in amplitude, time, phase place, frequency signal and the umber of pulse.
Touch-control circuit is by detecting the touching signals on each strip electrode line or the difference of touching signals variable quantity or touching signals rate of change, determining the polar curve that gets an electric shock.
Touch-control circuit is by detecting the touching signals on each strip electrode line or the difference of touching signals variable quantity or touching signals rate of change, calculating the quilt of determining between electrode wires and touch the position.
Touched the position with the position that detects touching signals or touching signals variable quantity or touching signals rate of change maximum, or touched the position, or touched the position to detect touching signals or touching signals variable quantity or touching signals rate of change position maximum and that surpass certain setting threshold to detect position that touching signals or touching signals variable quantity or touching signals rate of change surpass certain setting threshold.
Connecting the electrode group of touch-control circuit on the described touch base plate, is the electrode group of two groups of quadratures.
The edge that connects the electrode wires of touch-control circuit on the described touch base plate is a broken line, on the broken line angle of two adjacent straight lines greater than 20 ° less than 160 °.
Electrode on the described touch base plate except that having the electrode wires that connects touch-control circuit, also has the electrode that does not connect touch-control circuit.
Be no less than the electrode group of two sets intersect on the described touch base plate, each is organized electrode and is arranged on the different substrate.
The electrode group that is no less than two sets intersect on the described touch base plate is arranged on the different layers on the same substrate, between each layer electrode with insulation course separately.
Described touch base plate is provided with and intersects the guarded electrode that the insulation of electrode group is isolated.
The electrode wires that connects touch-control circuit on the described touch base plate is the non-touch face that is in touch base plate.
Described touch base plate is flexible or rigid transparency carrier.
The beneficial effect that the utility model is compared with the prior art is:
The utility model can be realized high-resolution digital capacitive touch screen.Capacitive touch screen of the present utility model, by detecting electrode and non-detecting electrode are applied touching signals simultaneously, reduce touching signals flowing between the detecting electrode and between detecting electrode and the non-detecting electrode, controlled the flow direction of touching signals, will be to the accuracy of the utmost point judgement that gets an electric shock, bring up to distinguishable each strip electrode line, really realize digital capacitive touch screen.
Amplitude, phase place, frequency or coding to touching signals that each detecting electrode applies also can be adjusted into difference, to the amplitude of touching signals that non-detecting electrode applies, phase place, frequency or coding with to amplitude, phase place, the frequency of the touching signals that detecting electrode applied or encode also can be adjusted into different so that control the flow direction of touching signals more subtly.
The utility model can be realized large scale electric capacity touch screen.Digital capacitive touch screen of the present utility model, by detecting the difference of touching signals on each strip electrode line or touching signals variable quantity or touching signals rate of change, just by detecting the relative value of touching signals between each strip electrode line, determine the polar curve that gets an electric shock, resistance value aspect to electrode wires does not have excessive demand, elongated in large touch screen electrode wires, when resistance value becomes big, still can be by measuring the relative value of touching signals between each strip electrode line, accurately determine the polar curve that gets an electric shock, realize the capacitive touch screen of large scale even oversize.
Judge the condition of the polar curve that gets an electric shock, can detect the maximum electrode wires that also surpasses certain setting threshold of touching signals variation and be the polar curve that gets an electric shock that touch control type flat-panel display is with single-point touch.Judge the condition of the polar curve that gets an electric shock, also can be only change the electrode wires that surpasses certain setting threshold and be the polar curve that gets an electric shock, allow digital capacitive touch screen of the present utility model allow the while multi-point touch to detect touching signals.
Digital capacitive touch screen of the present utility model is simple in structure, and the habitual manufacturing process of display and touch screen realizes easily at present, makes that the cost of touch screen is low, reliability is high.
Description of drawings
Fig. 1 is the synoptic diagram that is electrically connected of the utility model embodiment one, mode two and mode three;
Fig. 2 is the synoptic diagram that is electrically connected of the utility model embodiment four and mode five;
Fig. 3 is the structural representation of the utility model embodiment six;
Fig. 4 is the structural representation of the utility model embodiment seven;
Fig. 5 is the structural representation of the utility model embodiment eight;
Fig. 6 is the structural representation of the utility model embodiment nine;
Fig. 7 is the structural representation of the utility model embodiment ten.
Embodiment
Embodiment one
Digital capacitive touch screen 100 as shown in Figure 1 comprises Trackpad 110 and touch-control circuit 140 etc.Trackpad 110 be provided with two groups of mutually orthogonal column electrode groups 120 (have row electrode lines 121,122 ..., 12m) and row electrode group 130 (have row electrode wires 131,132 ..., 13n).Touch-control circuit 140 has the capable detection circuit 141 of touch-control, touch-control row detection circuit 142 and control decision circuitry 143 etc.Each electrode wires of column electrode group 120 all is connected to the capable detection circuit 141 of touch-control, and each electrode wires of row electrode group 130 all is connected to touch-control row detection circuit 142, and the capable detection circuit 141 of touch-control all is connected control decision circuitry 143 with touch-control row detection circuit 142.
At first, 140 pairs of column electrode groups of touch-control circuit 120 are carried out touch-control and are surveyed, the capable detection circuit 141 of touch-control is selected all row electrode lines 121 of column electrode group 120 simultaneously, 122,12m is as the row detecting electrode, simultaneously all row electrode lines are applied touching signals, 142 pairs of row electrodes of touch-control row detection circuit group, 130 all row electrode wires also apply the identical touching signals that applies with 141 pairs of column electrodes of the capable detection circuit of touch-control, the capable detection circuit 141 of touch-control also detects the variation of the touching signals of each bar row electrode lines of flowing through respectively, and control decision circuitry 143 detects the touching signals variable quantity maximum of flowing through with the capable detection circuit 141 of touch-control and also touched row electrode lines above the row electrode lines of certain setting threshold; Then, 140 pairs of row electrodes of touch-control circuit group 130 is carried out touch-control and is surveyed, touch-control row detection circuit 142 is selected all row electrode wires 131 of row electrode group 130 simultaneously, 132,13n is as the row detecting electrode, simultaneously all row electrode wires are applied touching signals, 141 pairs of column electrode groups of the capable detection circuit of touch-control, 120 all row electrode lines also apply the identical touching signals that applies with 142 pairs of row electrodes of touch-control row detection circuit, touch-control row detection circuit 142 also detects the variation of the touching signals of each bar row electrode wires of flowing through respectively, and control decision circuitry 143 detects the touching signals variable quantity maximum of flowing through with touch-control row detection circuit 142 and also touched the row electrode wires above the row electrode wires of certain setting threshold.Touch-control circuit 140 is carrying out conversion between the touch-control detection repeatedly to column electrode group 120 with to row electrode group 130, the point of crossing of touching row electrode lines and being touched the row electrode wires by the quilt that detects, determine by contact position, form the digital capacitive touch screen of identification m * n touch point.
Judge the condition of the polar curve that gets an electric shock, can not be the polar curve that gets an electric shock to detect the maximum electrode wires that also surpasses certain setting threshold of the touching signals variable quantity of flowing through yet, and be position of touch to detect the mean value that the touching signals of flowing through changes the position weighting touching signals variable quantity of first three the large electrode line that surpasses certain setting threshold most, the position of touch that calculates like this is often in the center of certain electrode wires, thus obtain discerning meticulousr, more than the digital capacitive touch screen of m * n touch point.
When allowing the operator touch digital capacitive touch screen, the variable quantity of touching signals is enough big, disturbs with opposing and is convenient to measure, and will allow touching signals that enough penetration powers are arranged, and touch-control circuit is not less than 50K Hz to the frequency of the touching signals of electrode wires output.
Touching signals on the touch-control detection circuit detecting electrode line, detection can be voltage signal, also can be current signal; That detects can be amplitude, also can be phase place or frequency signal, detection also can be in the umber of pulse of electrode wires to capacitor charge and discharge time period inside counting device record.
Judge the condition of the polar curve that gets an electric shock, also can be only be the polar curve that gets an electric shock, allow digital capacitive touch screen allow the while multi-point touch to detect the electrode wires that the touching signals variable quantity of flowing through surpasses certain setting threshold.
Embodiment two
Digital capacitive touch screen 100 as shown in Figure 1 comprises Trackpad 110 and touch-control circuit 140 etc.Trackpad 110 be provided with two groups of mutually orthogonal column electrode groups 120 (have row electrode lines 121,122 ..., 12m) and row electrode group 130 (have row electrode wires 131,132 ..., 13n).Touch-control circuit 140 has the capable detection circuit 141 of touch-control, touch-control row detection circuit 142 and control decision circuitry 143 etc.Each electrode wires of column electrode group 120 all is connected to the capable detection circuit 141 of touch-control, and each electrode wires of row electrode group 130 all is connected to touch-control row detection circuit 142, and the capable detection circuit 141 of touch-control all is connected control decision circuitry 143 with touch-control row detection circuit 142.
Touch-control circuit 140 carries out the touch-control detection to column electrode group 120 and row electrode group 130 simultaneously.The capable detection circuit 141 of touch-control is selected all row electrode lines 121 of column electrode group 120 simultaneously, 122,12m is as the row detecting electrode, simultaneously all row electrode lines are applied touching signals, 142 pairs of row electrodes of touch-control row detection circuit group, 130 all row electrode wires also apply the identical touching signals that applies with 141 pairs of column electrodes of the capable detection circuit of touch-control, the capable detection circuit 141 of touch-control also detects the variation of the touching signals of each bar row electrode lines of flowing through respectively, and control decision circuitry 143 detects the touching signals variable quantity maximum of flowing through with the capable detection circuit 141 of touch-control and also touched row electrode lines above the row electrode lines of certain setting threshold;
Touch-control row detection circuit 142 is also selected all row electrode wires 131 of row electrode group 130 simultaneously, 132,13n is as the row detecting electrode, simultaneously all row electrode wires are applied touching signals, 141 pairs of column electrode groups of the capable detection circuit of touch-control, 120 all row electrode lines also apply the identical touching signals that applies with 142 pairs of row electrodes of touch-control row detection circuit, touch-control row detection circuit 142 also detects the variation of the touching signals of each bar row electrode wires of flowing through respectively, and control decision circuitry 143 detects the touching signals variable quantity maximum of flowing through with touch-control row detection circuit 142 and also touched the row electrode wires above the row electrode wires of certain setting threshold.Touch-control circuit 140 constantly repeats to survey to column electrode group 120 with to the touch-control of row electrode group 130, by the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determines by contact position, forms the digital capacitive touch screen of identification m * n touch point.
Judge the condition of the polar curve that gets an electric shock, can not be the polar curve that gets an electric shock to detect the maximum electrode wires that also surpasses certain setting threshold of the touching signals variable quantity of flowing through yet, and be position of touch to detect the mean value of position weighting touching signals variable quantity that the touching signals variable quantity of flowing through surpasses first three large electrode line of certain setting threshold, the position of touch that calculates like this is often in the center of certain electrode wires, thus obtain discerning meticulousr, more than the digital capacitive touch screen of m * n touch point.
Touching signals on the touch-control detection circuit detecting electrode line, detection can be voltage signal, also can be current signal; That detects can be amplitude, also can be phase place or frequency signal, detection also can be in the umber of pulse of electrode wires to capacitor charge and discharge time period inside counting device record.
Judge the condition of the polar curve that gets an electric shock, also can be only be the polar curve that gets an electric shock, allow digital capacitive touch screen allow the while multi-point touch to detect the electrode wires that the touching signals variable quantity of flowing through surpasses certain setting threshold.
Embodiment three
Digital capacitive touch screen 100 as shown in Figure 1 comprises Trackpad 110 and touch-control circuit 140 etc.Trackpad 110 be provided with two groups of mutually orthogonal column electrode groups 120 (have row electrode lines 121,122 ..., 12m) and row electrode group 130 (have row electrode wires 131,132 ..., 13n).Touch-control circuit 140 has the capable detection circuit 141 of touch-control, touch-control row detection circuit 142 and control decision circuitry 143 etc.Each electrode wires of column electrode group 120 all is connected to the capable detection circuit 141 of touch-control, and each electrode wires of row electrode group 130 all is connected to touch-control row detection circuit 142, and the capable detection circuit 141 of touch-control all is connected control decision circuitry 143 with touch-control row detection circuit 142.
At first, 140 pairs of column electrode groups of touch-control circuit 120 are carried out touch-control and are surveyed, the capable detection circuit 141 of touch-control is in the mode of scanning, each selects row electrode lines 121 constantly, 122, strip electrode line among the 12m applies touching signals as the row detecting electrode, and detect the variation of the touching signals of this strip electrode line of flowing through, simultaneously, the capable detection circuit 141 of touch-control also applies and the identical touching signals of touching signals that detecting electrode is applied the row electrode lines of all the other all non-detecting electrodes, 142 pairs of all row electrode wires of touch-control row detection circuit also apply and the identical touching signals of touching signals that detecting electrode is applied, and control decision circuitry 143 detects the maximum row electrode lines that also surpasses certain setting threshold of the touching signals variable quantity of flowing through with the capable detection circuit 141 of touch-control and touched row electrode lines; Then, 140 pairs of row electrodes of touch-control circuit group 130 is carried out touch-control and is surveyed, touch-control row detection circuit 142 is in the mode of scanning, each selects row electrode wires 131 constantly, 132, strip electrode line among the 13n applies touching signals as the row detecting electrode, and detect the variation of the touching signals of this strip electrode line of flowing through, simultaneously, touch-control row detection circuit 142 also applies and the identical touching signals of touching signals that detecting electrode is applied the row electrode wires of all the other all non-detecting electrodes, 141 pairs of all row electrode lines of the capable detection circuit of touch-control also apply and the identical touching signals of touching signals that detecting electrode is applied, and control decision circuitry 143 detects the maximum row electrode wires that also surpasses certain setting threshold of the touching signals variable quantity of flowing through with touch-control row detection circuit 142 and touched the row electrode wires.Touch-control circuit 140 is carrying out conversion between the touch-control detection repeatedly to column electrode group 120 with to row electrode group 130, the point of crossing of touching row electrode lines and being touched the row electrode wires by the quilt that detects, determine by contact position, form the digital capacitive touch screen of identification m * n touch point.
When detecting electrode is applied touching signals, also can be adjusted into the amplitude of touching signals that non-detecting electrode applies, phase place, frequency and amplitude, phase place, frequency the touching signals that detecting electrode applied different so that control the flow direction of touching signals more subtly.Detecting electrode is applied different with to touching signals that non-detecting electrode applies of touching signals, can be that amplitude, phase place, frequency are all inequality, also can be one or two differences in amplitude, phase place, the frequency.
Touching signals on the touch-control detection circuit detecting electrode line, detection can be voltage signal, also can be current signal; That detects can be amplitude, also can be phase place or frequency signal, detection also can be in the umber of pulse of electrode wires to capacitor charge and discharge time period inside counting device record.
Judge the condition of the polar curve that gets an electric shock, can not be the polar curve that gets an electric shock to detect the maximum electrode wires that also surpasses certain setting threshold of the touching signals variable quantity of flowing through yet, and be position of touch to detect the mean value of position weighting touching signals variable quantity that the touching signals variable quantity of flowing through surpasses first three large electrode line of certain setting threshold, the position of touch that calculates like this is often in the center of certain electrode wires, thus obtain discerning meticulousr, more than the digital capacitive touch screen of m * n touch point.
Judge the condition of the polar curve that gets an electric shock, also can be only be the polar curve that gets an electric shock, allow digital capacitive touch screen allow the while multi-point touch to detect the electrode wires that the touching signals variable quantity of flowing through surpasses certain setting threshold.
For fear of the false touch control, the control decision circuitry can be got rid of, though the detected touching signals variable quantity of the capable detection circuit of touch-control is maximum and surpass certain setting threshold, touching signals in time rate of change excessive (too fast false touch) or touching signals in time the electrode wires of rate of change too small (crossing slow false touch) be the polar curve that gets an electric shock.
Embodiment four
Digital capacitive touch screen 200 as shown in Figure 2 comprises Trackpad 210 and touch-control circuit 240 etc.Trackpad 210 be provided with two groups of mutually orthogonal column electrode groups 220 (have row electrode lines 221,222 ..., 22i, 22i+1 ..., 22m) and row electrode group 230 (have row electrode wires 231,232 ..., 23j, 23j+1 ..., 23n).Touch-control circuit 240 has the capable detection circuit 241 of touch-control, touch-control row detection circuit 242 and control decision circuitry 243 etc.Each electrode wires of column electrode group 220 all is connected to the capable detection circuit 241 of touch-control, and each electrode wires of row electrode group 230 all is connected to touch-control row detection circuit 242, and the capable detection circuit 241 of touch-control all is connected control decision circuitry 243 with touch-control row detection circuit 242.
At first, 240 pairs of column electrode groups of touch-control circuit 220 are carried out touch-control and are surveyed, the capable detection circuit 241 of touch-control is in the mode of scanning, each is constantly from row electrode lines 221,222, select a strip electrode line to apply touching signals among the 22i as detecting electrode, from row electrode lines 22i+1, select another strip electrode line also to apply touching signals among the 22m as detecting electrode, and detect the variation of the touching signals of this two strip electrodes line of flowing through respectively, simultaneously, the capable detection circuit 241 of touch-control also applies amplitude to the row electrode lines of all the other all non-detecting electrodes, phase place, the all identical touching signals of frequency, 242 pairs of all row electrode wires of touch-control row detection circuit also apply amplitude, phase place, the all identical touching signals of frequency, control decision circuitry 243 with the capable detection circuit 241 of touch-control in all row electrode lines 221,222,22i, 22i+1, detect the touching signals of flowing through among the 22m and change the maximum row electrode lines of certain setting threshold that also surpasses for being touched row electrode lines; Then, 240 pairs of row electrodes of touch-control circuit group 230 is carried out touch-control and is surveyed, touch-control row detection circuit 242 is in the mode of scanning, each is constantly from row electrode wires 231,232, select a strip electrode line to apply touching signals among the 23j as detecting electrode, from row electrode wires 23j+1, select another strip electrode line also to apply touching signals among the 23n as detecting electrode, and detect the variation of the touching signals of this two strip electrodes line of flowing through respectively, simultaneously, touch-control row detection circuit 242 also applies amplitude to the row electrode wires of all the other all non-detecting electrodes, phase place, the all identical touching signals of frequency, 241 pairs of all row electrode lines of the capable detection circuit of touch-control also apply amplitude, phase place, the all identical touching signals of frequency, control decision circuitry 243 with touch-control row detection circuit 242 in all row electrode wires 231,232,23j, 23j+1, detect the touching signals of flowing through among the 23n and change the maximum row electrode wires of certain setting threshold that also surpasses for being touched the row electrode wires.Touch-control circuit 240 is carrying out conversion between the touch-control detection repeatedly to column electrode group 220 with to row electrode group 230, the point of crossing of touching row electrode lines and being touched the row electrode wires by the quilt that detects, determine by contact position, form the digital capacitive touch screen of identification m * n touch point.
Because capable detection circuit 241 of touch-control and touch-control row detection circuit 242 all are to have selected two strip electrode lines as detecting electrode simultaneously, carry out the touch-control detection in the mode that subregion scans simultaneously, shortened the time of surveying touch point on the whole touch screen.
When detecting electrode is applied touching signals, also can be adjusted into the amplitude of touching signals that non-detecting electrode applies, phase place, frequency and amplitude, phase place, frequency the touching signals that detecting electrode applied different so that control the flow direction of touching signals more subtly.Detecting electrode is applied different with to touching signals that non-detecting electrode applies of touching signals, can be that amplitude, phase place, frequency are all inequality, also can be one or two differences in amplitude, phase place, the frequency.
Judge the condition of the polar curve that gets an electric shock, can not be the polar curve that gets an electric shock to detect the maximum electrode wires that also surpasses certain setting threshold of touching signals variation of flowing through yet, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
For fear of the false touch control, the control decision circuitry can be got rid of, though the detected touching signals variable quantity of the capable detection circuit of touch-control is maximum and surpass certain setting threshold, touching signals in time rate of change excessive (too fast false touch) or touching signals in time the electrode wires of rate of change too small (crossing slow false touch) be the polar curve that gets an electric shock.
Embodiment five
Digital capacitive touch screen 200 as shown in Figure 2 comprises Trackpad 210 and touch-control circuit 240 etc.Trackpad 210 be provided with two groups of mutually orthogonal column electrode groups 220 (have row electrode lines 221,222 ..., 22i, 22i+1 ..., 22m) and row electrode group 230 (have row electrode wires 231,232 ..., 23j, 23j+1 ..., 23n).Touch-control circuit 240 has the capable detection circuit 241 of touch-control, touch-control row detection circuit 242 and control decision circuitry 243 etc.Each electrode wires of column electrode group 220 all is connected to the capable detection circuit 241 of touch-control, and each electrode wires of row electrode group 230 all is connected to touch-control row detection circuit 242, and the capable detection circuit 241 of touch-control all is connected control decision circuitry 243 with touch-control row detection circuit 242.
At first, 240 pairs of column electrode groups of touch-control circuit 220 are carried out touch-control and are surveyed, the capable detection circuit 241 of touch-control is in the mode of scanning, each is constantly from row electrode lines 221,222, select a strip electrode line to apply touching signals among the 22i as detecting electrode, from row electrode lines 22i+1, select another strip electrode line to do also to apply touching signals among the 22m for detecting electrode, and detect the variation of the touching signals of this two strip electrodes line of flowing through respectively, simultaneously, the capable detection circuit 241 of touch-control also applies amplitude to the row electrode lines of all the other all non-detecting electrodes, phase place, the all identical touching signals of frequency, 242 pairs of all row electrode wires of touch-control row detection circuit also apply amplitude, phase place, the all identical touching signals of frequency, control decision circuitry 243 with the capable detection circuit 241 of touch-control in row electrode lines 221,222, detect the touching signals of flowing through among the 22i and change the maximum row electrode lines that also surpasses certain setting threshold for being touched row electrode lines, control decision circuitry 243 is also with row electrode lines 22i+1, detect the touching signals of flowing through among the 22m and change the maximum row electrode lines of certain setting threshold that also surpasses for being touched row electrode lines; Then, 240 pairs of row electrodes of touch-control circuit group 230 is carried out touch-control and is surveyed, touch-control row detection circuit 242 is in the mode of scanning, each is constantly from row electrode wires 231,232,23j, 23j+1, select a strip electrode line to apply touching signals among the 23n as detecting electrode, and detect the variation of the touching signals of this strip electrode line of flowing through, simultaneously, touch-control row detection circuit 242 also applies amplitude to the row electrode wires of all the other all non-detecting electrodes, phase place, the all identical touching signals of frequency, 241 pairs of all row electrode lines of the capable detection circuit of touch-control also apply amplitude, phase place, the all identical touching signals of frequency, control decision circuitry 243 with touch-control row detection circuit 242 in all row electrode wires 231,232,23j, 23j+1, detect the touching signals of flowing through among the 23n and change the maximum row electrode wires of certain setting threshold that also surpasses for being touched the row electrode wires.Touch-control circuit 240 is carrying out conversion between the touch-control detection repeatedly to column electrode group 220 with to row electrode group 230, the point of crossing of touching row electrode lines and being touched the row electrode wires by the quilt that detects, determine by contact position, formation is boundary with row electrode lines 22i, respectively the digital capacitive touch screen of bottom half identification i * n touch point and (m-i) * n touch point on Trackpad 210.
When detecting electrode is applied touching signals, also can be adjusted into the amplitude of touching signals that non-detecting electrode applies, phase place, frequency and amplitude, phase place, frequency the touching signals that detecting electrode applied different so that control the flow direction of touching signals more subtly.Detecting electrode is applied different with to touching signals that non-detecting electrode applies of touching signals, can be that amplitude, phase place, frequency are all inequality, also can be one or two differences in amplitude, phase place, the frequency.
For fear of the false touch control, the control decision circuitry can be got rid of, though the detected touching signals variable quantity of the capable detection circuit of touch-control is maximum and surpass certain setting threshold, touching signals in time rate of change excessive (too fast false touch) or touching signals in time the electrode wires of rate of change too small (crossing slow false touch) be the polar curve that gets an electric shock.
Embodiment six
The Trackpad 300 of digital capacitive touch screen as shown in Figure 3 comprises upper substrate 310 and infrabasal plate 320, and upper substrate 310 and infrabasal plate 320 are by adhesives 330 bonding being integral.The inner surface of upper substrate 310 be provided with the edge be the strip electrode group 340 formed of the electrode wires of straight line (have electrode wires 341,342 ..., 34m), the inner surface of infrabasal plate 320 be provided with the edge be the strip electrode group 350 formed of the electrode wires of straight line (have electrode wires 351,352 ..., 35n), the direction of the direction of electrode group 350 and electrode group 340 is perpendicular.Electrode group 340 and electrode group 350 are used to be connected the exit of touch-control circuit, are separately positioned on two perpendicular edges of upper substrate 310 and infrabasal plate 320.
Embodiment seven
The Trackpad 400 of digital capacitive touch screen as shown in Figure 4 for Trackpad 400 places the purpose of using before the display, allows Trackpad 400 reduce influence to display effect as far as possible, and substrate adopts monolithic transparency carrier 410.The uper side surface of substrate 410 be provided with the edge be the strip electrode group 420 formed of the electrode wires of broken line (have electrode wires 421,422 ..., 42m), the downside surface of substrate 410 be provided with the edge be the strip electrode group 430 formed of the electrode wires of broken line (have electrode wires 431,432 ..., 43n), the direction of the center line of the direction of the center line of electrode group 430 each electrode wires and electrode group 420 each electrode wires is perpendicular.On the broken line at electrode group 420 and electrode group 430 edges the angle α of two adjacent straight lines greater than 20 ° less than 160 °.Electrode group 420 and electrode group 430 are used to be connected the exit of touch-control circuit, are separately positioned on two perpendicular edges of substrate 410.In order to allow not directly touching electrode group 420 of user, insulation course 440 is arranged in the arranged outside of electrode group 420.
Embodiment eight
The Trackpad 500 of digital capacitive touch screen as shown in Figure 5 for Trackpad 500 places the purpose of using before the display, allows Trackpad 500 reduce influence to display effect as far as possible, and substrate adopts monolithic transparency carrier 510.The surface of substrate 510 non-touch face one sides be provided with the strip electrode group 520 that electrode wires that the edge is straight line forms (have electrode wires 521,522 ..., 52m) and strip electrode group 530 (have electrode wires 531,532 ..., 53n), electrode group 520 and electrode group 530 are on the different layers, between electrode group 520 and electrode group 530 two-layer electrodes with insulation course 540 separately.When using before display for Trackpad 500, Trackpad 500 has close transmissivity everywhere as far as possible, and the zone that is not covered by the projection of electrode group 520 and electrode group 530 on 510 of the substrates is provided with dispersive electrode group 550 at same one deck of electrode group 520.The direction of the center line of the direction of the center line of electrode group 520 each electrode wires and electrode group 530 each electrode wires is perpendicular.Electrode group 520 and electrode group 530 are used to be connected the exit of touch-control circuit, are separately positioned on two perpendicular edges of substrate 510.
Embodiment nine
The Trackpad 600 of digital capacitive touch screen as shown in Figure 6 for Trackpad 600 places the purpose of using before the display, allows Trackpad 600 reduce influence to display effect as far as possible, and substrate adopts monolithic transparency carrier 610.The surface of substrate 610 non-touch face one sides be provided with the strip electrode group 620 that electrode wires that the edge is straight line forms (have electrode wires 621,622 ..., 62m) and strip electrode group 630 (have electrode wires 631,632 ..., 63n), electrode group 620 and electrode group 630 are on the different layers, between electrode group 620 and electrode group 630 two-layer electrodes with insulation course 640 separately.When using before display for Trackpad 600, Trackpad 600 has close transmissivity everywhere as far as possible, and the zone that is not covered by the projection of electrode group 620 and electrode group 630 on 610 of the substrates is provided with dispersive electrode group 650 at same one deck of electrode group 620.The direction of the center line of the direction of the center line of electrode group 620 each electrode wires and electrode group 630 each electrode wires is perpendicular.Electrode group 620 and electrode group 630 are used to be connected the exit of touch-control circuit, are separately positioned on two perpendicular edges of substrate 610.For prevent in the display or in the machine electric signal interference of touching signals on the Trackpad 600 is set up one deck guarded electrode 660 in the inboard of electrode group 630 again, between guarded electrode 660 and electrode group 630 two-layer electrodes with insulation course 670 separately.
Embodiment ten
The Trackpad 700 of digital capacitive touch screen as shown in Figure 7 for Trackpad 700 places the purpose of using before the display, allows Trackpad 700 reduce influence to display effect as far as possible, and substrate adopts monolithic transparency carrier 710.The surface of substrate 710 touch faces one side be provided with the strip electrode group 720 that electrode wires that the edge is straight line forms (have electrode wires 721,722 ..., 72m) and strip electrode group 730 (have electrode wires 731,732 ..., 73n), electrode group 720 and electrode group 730 are on the different layers, between electrode group 720 and electrode group 730 two-layer electrodes with insulation course 740 separately.In order to allow not directly touching electrode group 730 of user, insulation course 760 is arranged in the arranged outside of electrode group 730.When using before display for Trackpad 700, Trackpad 700 has close transmissivity everywhere as far as possible, and the zone that is not covered by the projection of electrode group 720 and electrode group 730 on 710 of the substrates is provided with dispersive electrode group 750 at same one deck of electrode group 730.The direction of the center line of the direction of the center line of electrode group 720 each electrode wires and electrode group 730 each electrode wires is perpendicular.Electrode group 720 and electrode group 730 are used to be connected the exit of touch-control circuit, are separately positioned on two perpendicular edges of substrate 710.For prevent in the display or in the machine electric signal interference of touching signals on the Trackpad 700 is provided with one deck guarded electrode 770 on the surface of substrate 710 non-touch face one sides.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (20)
1, a kind of digital capacitive touch screen, form by touch base plate and touch-control circuit etc., it is characterized in that: touch base plate is provided with the electrode group that is no less than two sets intersect, each strip electrode line connects touch-control circuit, each selects many strip electrodes line as detecting electrode constantly, simultaneously many detecting electrode lines are applied touching signals, and detect the variation of touching signals on the many detecting electrode lines.
2, a kind of digital capacitive touch screen, form by touch base plate and touch-control circuit etc., it is characterized in that: touch base plate is provided with the electrode group that is no less than two sets intersect, each strip electrode line connects touch-control circuit, each moment selection portion sub-electrode line is as detecting electrode, when the detecting electrode line is applied touching signals and detects the variation of touching signals on the detecting electrode line, also non-detecting electrode line is applied touching signals.
3, digital capacitive touch screen according to claim 2 is characterized in that:
The described non-detecting electrode that applies touching signals is to connect in each strip electrode line of touch-control circuit non-detecting electrode or non-detecting electrode partly all except that detecting electrode.
4, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
It is to carry out in the mode of scanning that described touch-control circuit is selected detecting electrode, and the different moment select the electrode wires of different piece as detecting electrode.
5, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Amplitude, phase place, frequency or the coding of the touching signals that applies on described each strip electrode are identical with amplitude, phase place, frequency or the coding of the touching signals that is applied on the described detecting electrode.
6, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Amplitude, phase place, frequency or the coding of the touching signals that applies on described each strip electrode are different with in the amplitude of the touching signals that is applied on the described detecting electrode, phase place, frequency or the coding at least one.
7, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Described touch-control circuit is not less than 50K Hz to the frequency of the touching signals of electrode wires output.
8, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Touching signals on the described touch-control circuit detecting electrode line, detection be at least a in current signal and the voltage signal.
9, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Touching signals on the described touch-control circuit detecting electrode line, detection be at least a in amplitude, time, phase place, frequency signal and the umber of pulse.
10, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Touch-control circuit is by detecting the touching signals on each strip electrode line or the difference of touching signals variable quantity or touching signals rate of change, determining the polar curve that gets an electric shock.
11, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Touch-control circuit is by detecting the touching signals on each strip electrode line or the difference of touching signals variable quantity or touching signals rate of change, calculating the quilt of determining between electrode wires and touch the position.
12, according to claim 10 or 11 described digital capacitive touch screens, it is characterized in that:
Touched the position with the position that detects touching signals or touching signals variable quantity or touching signals rate of change maximum, or touched the position, or touched the position to detect touching signals or touching signals variable quantity or touching signals rate of change position maximum and that surpass certain setting threshold to detect position that touching signals or touching signals variable quantity or touching signals rate of change surpass certain setting threshold.
13, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Connecting the electrode group of touch-control circuit on the described touch base plate, is the electrode group of two groups of quadratures.
14. digital capacitive touch screen according to claim 1 and 2 is characterized in that:
The edge that connects the electrode wires of touch-control circuit on the described touch base plate is a broken line, on the broken line angle of two adjacent straight lines greater than 20 ° less than 160 °.
15, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Electrode on the described touch base plate except that having the electrode wires that connects touch-control circuit, also has the electrode that does not connect touch-control circuit.
16, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Be no less than the electrode group of two sets intersect on the described touch base plate, each is organized electrode and is arranged on the different substrate.
17, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
The electrode group that is no less than two sets intersect on the described touch base plate is arranged on the different layers on the same substrate, between each layer electrode with insulation course separately.
18, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Described touch base plate is provided with and intersects the guarded electrode that the insulation of electrode group is isolated.
19, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
The electrode wires that connects touch-control circuit on the described touch base plate is the non-touch face that is in touch base plate.
20, digital capacitive touch screen according to claim 1 and 2 is characterized in that:
Described touch base plate is flexible or rigid transparency carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201526358U CN201425741Y (en) | 2009-05-11 | 2009-05-11 | Digital capacitive touch screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201526358U CN201425741Y (en) | 2009-05-11 | 2009-05-11 | Digital capacitive touch screen |
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| CN201425741Y true CN201425741Y (en) | 2010-03-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124034A1 (en) * | 2010-04-09 | 2011-10-13 | 智点科技（深圳）有限公司 | Capacitive touch-control screen structure |
| CN102650915A (en) * | 2011-11-14 | 2012-08-29 | 北京京东方光电科技有限公司 | Digital touch screen and touch positioning method thereof |
| CN106991365A (en) * | 2016-01-21 | 2017-07-28 | 上海箩箕技术有限公司 | Optical fingerprint sensor module and its application method |
-
2009
- 2009-05-11 CN CN2009201526358U patent/CN201425741Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124034A1 (en) * | 2010-04-09 | 2011-10-13 | 智点科技（深圳）有限公司 | Capacitive touch-control screen structure |
| CN102650915A (en) * | 2011-11-14 | 2012-08-29 | 北京京东方光电科技有限公司 | Digital touch screen and touch positioning method thereof |
| CN102650915B (en) * | 2011-11-14 | 2014-10-22 | 北京京东方光电科技有限公司 | Digital touch screen and touch positioning method thereof |
| CN106991365A (en) * | 2016-01-21 | 2017-07-28 | 上海箩箕技术有限公司 | Optical fingerprint sensor module and its application method |
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