CN102262484A - Touch screen, touch system and display device - Google Patents
Touch screen, touch system and display device Download PDFInfo
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- CN102262484A CN102262484A CN2010101839580A CN201010183958A CN102262484A CN 102262484 A CN102262484 A CN 102262484A CN 2010101839580 A CN2010101839580 A CN 2010101839580A CN 201010183958 A CN201010183958 A CN 201010183958A CN 102262484 A CN102262484 A CN 102262484A
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Abstract
The invention relates to a touch screen, a touch system and a display device. The touch screen comprises at least two light sources, light absorbing strips, at least two direction sensors, at least two light condensing devices and a processing circuit, wherein the light sources are arranged around a touch detection area of the touch screen, and the light emitted by each light source covers the touch detection area; the light absorbing strips are arranged around the touch detection area to absorb the light emitted by the at least two light sources; the direction sensors are arranged at positions close to the at least two light sources respectively, and at least one light source is arranged nearby each direction sensor; the light condensing devices are arranged in front of the at least two direction sensors, at least one light condensing device is arranged in front of each direction sensor, and the light condensing devices gather the light reflected by touched objects to the direction sensors; and the processing circuit is connected with the at least two direction sensors. According to the invention, the position resolution of the touch screen can be improved.
Description
Technical field
The present invention relates to field of photoelectric technology, relate in particular to a kind of touch-screen, touch system and display.
Background technology
Along with popularizing of computer technology, in early 1990s a kind of new human-computer interaction technology-touch screen technology has appearred.Adopt this technology, the user just can the operational computations machine as long as touch figure on the computer display or literal lightly with hand, thereby has broken away from the constraint of keyboard and mouse, is very easy to the user.
Touch-screen commonly used in the prior art is an infrared touch panel, the positional information that infrared touch panel uses a large amount of infrared transmitting tubes one to one and infrared receiving tube to determine touch objects, and principle is fairly simple.
But there is following defective in infrared touch panel: owing to used a large amount of infrared componentss, and the Installation and Debugging more complicated, so the production cost of touch-screen is higher; In addition, owing to adopt infrared transmitting tube and infrared receiving tube to determine the positional information of touch objects, therefore, the resolution of infrared touch panel is lower.
Summary of the invention
The invention provides a kind of touch-screen, touch system and display,, improve the position resolution of touch-screen in order to realize reducing the production cost of touch-screen.
The invention provides a kind of touch-screen, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
The extinction bar is installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of touch-screen, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of touch-screen, comprising:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of touch system, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
The extinction bar is installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of touch system, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of touch system, comprising:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of display, comprises display unit, also comprises touch-screen, and described touch-screen comprises:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
The extinction bar is installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of display, comprises display unit, also comprises touch-screen, and described touch-screen comprises:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
The present invention also provides a kind of display, comprises display unit, also comprises touch-screen, and described touch-screen comprises:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
In the present invention, at least the both direction sensor receives the light and the output continuous electric signal corresponding with the directional information of touch objects of the touch objects reflection that touches in the detection zone, the treatment circuit basis is the continuous electric signal of both direction sensor output at least, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, the both direction sensor has high position resolution at least, therefore, also improved the resolution of touch objects.
Description of drawings
Fig. 1 is the structural representation of touch-screen first embodiment of the present invention;
Fig. 2 is the structural representation of PSD among touch-screen second embodiment of the present invention;
Fig. 3 is the structural representation of touch-screen second embodiment of the present invention;
Fig. 4 is the structural representation of treatment circuit among touch-screen second embodiment of the present invention;
Fig. 5 is the structural representation of touch-screen the 3rd embodiment of the present invention;
Fig. 6 is the structural representation of touch-screen the 4th embodiment of the present invention;
Fig. 7 is the structural representation of touch-screen the 5th embodiment of the present invention;
Fig. 8 is the structural representation of touch-screen the 6th embodiment of the present invention;
Fig. 9 is the structural representation of display embodiment of the present invention.
Embodiment
The invention will be further described below in conjunction with specification drawings and specific embodiments.
Touch-screen first embodiment
As shown in Figure 1, structural representation for touch-screen first embodiment of the present invention, can comprise at least two light sources 111,112 ... 11n, extinction bar 12, at least the both direction sensor 131,132 ... 13m, at least two concentrating devices 141,142 ... 14s, treatment circuit 15, wherein, m, n and s are the natural number more than or equal to 2.
At least two light sources 111,112 ... 11n is installed in around the touch detection zone 16 of touch-screen.Extinction bar 12 is installed in and touches around the detection zone 16.At least the both direction sensor 131,132 ... 13m is installed in contiguous at least two light sources 111,112 respectively ... the position of 11n, has at least one light source near each direction sensor, particularly, light source can be installed in direction sensor next door, above or below.At least two concentrating devices 141,142 ... 14s is installed in both direction sensor 131,132 at least ... the 13m front, each direction sensor front has at least one concentrating device.Treatment circuit 15 and both direction sensor 131,132 at least ... 13m connects.
In the present embodiment, at least two light sources 111,112 ... the light of each light emitted among the 11n all covers and touches detection zone 16, when in touching detection zone 16, not having touch objects, extinction bar 12 sponges at least two light sources 111,112 ... the light of 11n emission, there is not light to be reflected into both direction sensor 131,132 at least ... 13m, at this moment, both direction sensor 131,132 at least ... 13m is output not.When in touching detection zone 16, having touch objects, at least two light sources 111,112 ... diffuse reflection takes place in the light of 11n emission on touch objects, at least two concentrating devices 141,142 ... 14s gathers both direction sensor 131 at least with the light of touch objects reflection, 132 ... 13m, at least the both direction sensor 131,132 ... 13m can both receive the light and the output continuous electric signal corresponding with the directional information of touch objects of touch objects reflection, wherein, the directional information of touch objects is the touch objects position with respect to both direction sensor 131 at least, 132 ... the direction of 13m position, treatment circuit 15 bases are both direction sensor 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, according to the directional information of touch objects, obtain the positional information of touch objects again.
Alternatively, extinction bar 12 can also be reflecting strips, and reflecting strips is with at least two light sources 111,112 ... the light of 11n emission reflexes to and touches outside the detection zone 16, thereby does not also have light to be reflected into both direction sensor 131,132 at least ... 13m.In the present embodiment, direction sensor is a kind of photoelectric sensor, and when not having light to inject direction sensor, direction sensor is output not, when light is injected direction sensor, and the continuous electric signal that direction sensor output is corresponding with the directional information of touch objects.Direction sensor not only can detect the direction of pointolite, and the atomic little direction that can also detect pointolite changes, and therefore, direction sensor has high position resolution, thereby has also improved the position resolution of touch-screen.
In the present embodiment,, can also on touch objects, install and return reflection bar, reflex to both direction sensor 131,132 at least thereby increase touch objects in order to strengthen the reflection efficiency of touch objects ... the light of 13m.
In the present embodiment, at least the both direction sensor 131,132 ... 13m receives the light and the output continuous electric signal corresponding with the directional information of touch objects of the touch objects reflection that touches in the detection zone 16, treatment circuit 15 bases are both direction sensor 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, at least the both direction sensor 131,132 ... 13m has high position resolution, therefore, also improved the resolution of touch objects.
Touch-screen second embodiment
In the present embodiment, direction sensor be specifically as follows position sensitive detector (PositionSensitive Detector, hereinafter to be referred as: PSD).PSD is based on horizontal photoelectric photoelectric device, when a branch of illumination is mapped on the photosurface of PSD, utilizes the lateral light electrical effect on its p-n junction that the continuous position data of incident luminous point on its photosurface can be provided.PSD not only can the position data of sensing point light source on its photosurface, also can sensing point light source atomic little change in location on the useful area of its photosurface, and therefore, PSD has the position resolution of high-quality.In the present embodiment, PSD is one dimension PSD.As shown in Figure 2, structural representation for PSD among touch-screen second embodiment of the present invention, when the photosurface of PSD is subjected to rayed, produce photocurrent at the light spot position place, it flows through P layer resistance, from two electrodes 21 and 22 output respectively that is arranged on the P layer, the photocurrent size is respectively I1 and I2, because P layer resistance is uniform, therefore, the photocurrent size of electrode 21 outputs is inversely proportional to the incident light spot position to the distance between the electrode 21, and the photocurrent size of electrode 22 outputs is inversely proportional to the incident light spot position to the distance between the electrode 22.The length of supposing photosurface is L, and true origin is located at the center of photosurface, and the center of photosurface is x to the distance between the incident luminous point, and the photocurrent I2 of the photocurrent I1 of electrode 21 outputs and electrode 22 outputs satisfies following relational expression:
I1＝I0×((L/2-x)/L)
I1＝I0×((L/2+x)/L)
I0＝I1+I2
Wherein, I0 is the input current of base stage 23.Can obtain by above-mentioned three relational expressions:
x＝(L×(I2-I1))/(2×(I1+I2))
Thereby obtain the particular location of incident luminous point on the photosurface of PSD.
As shown in Figure 3, structural representation for touch-screen second embodiment of the present invention, be with the difference of structural representation shown in Figure 1, present embodiment can also comprise the touch-screen framework, the touch-screen framework surrounds and touches detection zone 16, and the touch-screen framework comprises first edge 101, second edge 102, the 3rd edge 103 and the 4th edge 104.In addition, in the present embodiment, the quantity of PSD is two, comprises a PSD 171 and the 2nd PSD 172, the one PSD 171 is installed in the angle of cut place at first edge 101 and second edge 102, and the 2nd PSD 172 is installed in the angle of cut place at first edge 101 and the 4th edge 104.In the present embodiment, the quantity of concentrating device is two, is respectively first concentrating device 141 and second concentrating device, 142, the first concentrating devices 141 are installed in a PSD 171 fronts, and second concentrating device 142 is installed in the 2nd PSD 172 fronts.In the present embodiment, the quantity of light source is two, comprises that first light source 151 and secondary light source 152, the first light sources 151 are installed in PSD171 next door, and secondary light source 152 is installed in the 2nd PSD 172 next doors.Extinction bar 12 is installed in second edge 102, the 3rd edge 103 and the 4th edge 104.
Briefly introduce how treatment circuit 15 obtains touch objects according to the continuous electric signal of PSD output positional information below.As shown in Figure 4, the structural representation for treatment circuit among touch-screen second embodiment of the present invention can comprise pre-process circuit 151, analog to digital conversion circuit 152 and digital signal processing circuit 153.Pre-process circuit 151 is connected with the 2nd PSD 172 with a PSD 171, and analog to digital conversion circuit 152 is connected with pre-process circuit 151, and digital signal processing circuit 153 is connected with analog to digital conversion circuit 152.
The continuous electric signal of 151 couples the one PSD 171 of pre-process circuit and the 2nd PSD 172 outputs carries out pre-service, processing such as particularly, 151 pairs of continuous electric signal of pre-process circuit filter, amplification.Analog to digital conversion circuit 152 is a digital signal with pretreated continuous electrical signal conversion.Digital signal processing circuit 153 is according to digital signal, obtain the positional information of touch objects on the photosurface of a PSD 171 and the 2nd PSD172, and touch objects on the photosurface of a PSD 171 and the 2nd PSD 172 positional information and the directional information of touch objects have mapping relations, therefore can be according to the positional information of touch objects on the photosurface of a PSD 171 and the 2nd PSD 172, obtain the directional information of touch objects, according to the directional information of touch objects, obtain the positional information of touch objects again.Wherein, the directional information of touch objects is specifically as follows the line of touch objects position and a PSD 171 positions and angle and touch objects position and the line of the 2nd PSD 172 positions and the angle at first edge 101 at first edge 101, wherein, two PSD positions can be respectively the center of the photosurface of two PSD.Alternatively, the directional information of touch objects can also be the line of touch objects position and a PSD 171 positions and angle and touch objects position and the line of the 2nd PSD 172 positions and the angle at second edge 102 at the 4th edge 104.Digital signal processing circuit 153 can adopt triangulation to obtain the positional information of touch objects according to above-mentioned two angles, and triangulation is a prior art, does not repeat them here.
In the present embodiment, the one PSD 171 and the 2nd PSD 172 receive the light and the output continuous electric signal corresponding with the directional information of touch objects of the touch objects reflection that touches in the detection zone 16, treatment circuit 15 is according to the continuous electric signal of a PSD 171 and the 2nd PSD 172 outputs, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, a PSD 171 and the 2nd PSD 172 have high position resolution, therefore, also improved the resolution of touch objects.
Touch-screen the 3rd embodiment
As shown in Figure 5, structural representation for touch-screen the 3rd embodiment of the present invention, can comprise at least two light sources 111,112 ... 11n, at least the both direction sensor 131,132 ... 13m, retroreflecting bar 18, at least two concentrating devices 141,142 ... 14s, treatment circuit 15, wherein, m, n and s are the natural number more than or equal to 2.
At least two light sources 111,112 ... 11n is installed in around the touch detection zone 16 of touch-screen.At least the both direction sensor 131,132 ... 13m is installed in contiguous at least two light sources 111,112 respectively ... the position of 11n has at least one light source near each direction sensor.Retroreflecting bar 18 is installed in and touches around the detection zone 16.At least two concentrating devices 141,142 ... 14s is installed in both direction sensor 131,132 at least respectively ... the 13m front, each direction sensor front has at least one concentrating device.Treatment circuit 15 and both direction sensor 131,132 at least ... 13m connects.
In the present embodiment, at least two light sources 111,112 ... the light of each light emitted among the 11n covers and touches detection zone 16, retroreflecting bar 18 is with at least two light sources 111,112 ... the light of 11n emission reflexes to both direction sensor 131,132 at least ... 13m, at least two concentrating devices 141,142 ... 14s gathers both direction sensor 131,132 at least with the light of retroreflecting bar 18 reflections ... 13m.When in touching detection zone 16, not having touch objects, retroreflecting bar 18 is with at least two light sources 111,112 ... the light of 11n emission directly reflexes to both direction sensor 131,132 at least ... 13m, at this moment, both direction sensor 131,132 at least ... 13m does not have output.When in touching detection zone 16, having touch objects, retroreflecting bar 18 directly reflexes to both direction sensor 131 at least with part light, 132 ... 13m, also have the part light thing that is touched to shelter from, at this moment, at least the both direction sensor 131,132 ... 13m receives the light and the output continuous electric signal corresponding with the directional information of touch objects of retroreflecting bar 18 reflections, wherein, the directional information of touch objects is the touch objects position with respect to both direction sensor 131 at least, 132 ... the direction of 13m position, treatment circuit 15 bases are both direction sensor 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, according to the directional information of touch objects, obtain the positional information of touch objects again.
In the present embodiment, direction sensor is a kind of photoelectric sensor, when the light of retroreflecting bar reflection is not touched that thing blocks and when injecting direction sensor, direction sensor is output not, when the part light of retroreflecting bar reflection is touched that thing blocks and can not inject direction sensor the time, the continuous electric signal that direction sensor output is corresponding with the directional information of touch objects.Direction sensor not only can detect the direction of touch objects, and the atomic little direction that can also detect touch objects changes, and therefore, direction sensor has high position resolution, thereby has also improved the position resolution of touch-screen.
In the present embodiment, at least the both direction sensor 131,132 ... 13m receives the light and the output continuous electric signal corresponding with the directional information of touch objects of retroreflecting bar 18 reflections, treatment circuit 15 bases are both direction sensor 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, at least the both direction sensor 131,132 ... 13m has high position resolution, therefore, also improved the resolution of touch objects.
Touch-screen the 4th embodiment
In the present embodiment, direction sensor is specifically as follows PSD, in the present embodiment, when the photosurface of PSD all then by rayed, PSD is output not, when the part of the photosurface of PSD is not mapped to by illumination and when forming dim spot area, the continuous position information of PSD output dim spot area on its photosurface, when calculating the positional information of this dim spot area, can adopt three relational expressions among touch-screen second embodiment, not repeat them here.
As shown in Figure 6, structural representation for touch-screen the 4th embodiment of the present invention, be with the difference of structural representation shown in Figure 5, present embodiment can also comprise the touch-screen framework, the touch-screen framework surrounds and touches detection zone 16, and the touch-screen framework comprises first edge 101, second edge 102, the 3rd edge 103 and the 4th edge 104.In addition, in the present embodiment, the quantity of PSD is two, comprises a PSD 171 and the 2nd PSD 172, the one PSD 171 is installed in the angle of cut place at first edge 101 and second edge 102, and the 2nd PSD 172 is installed in the angle of cut place at first edge 101 and the 4th edge 104.In the present embodiment, the quantity of concentrating device is two, is respectively first concentrating device 141 and second concentrating device, 142, the first concentrating devices 141 are installed in a PSD 171 fronts, and second concentrating device 142 is installed in the 2nd PSD 172 fronts.In the present embodiment, the quantity of light source is two, comprises that first light source 151 and secondary light source 152, the first light sources 151 are installed in a PSD
171 next doors, secondary light source 152 are installed in the 2nd PSD 172 next doors.Retroreflecting bar 18 is installed in second edge 102, the 3rd edge 103 and the 4th edge 104.
In the present embodiment, the structure of treatment circuit 15 is identical with structural representation shown in Figure 4, and the course of work of treatment circuit 15 can not repeat them here referring to touch-screen second embodiment.
In the present embodiment, the one PSD 171 and the 2nd PSD 172 receive the light and the output continuous electric signal corresponding with the directional information of touch objects of the touch objects reflection that touches in the detection zone 16, treatment circuit 15 is according to the continuous electric signal of a PSD 171 and the 2nd PSD 172 outputs, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, a PSD 171 and the 2nd PSD 172 have high position resolution, therefore, also improved the resolution of touch objects.
Touch-screen the 5th embodiment
As shown in Figure 7, the structural representation for touch-screen the 5th embodiment of the present invention can comprise light source 19, at least the both direction sensor 131,132 ... 13m, at least two concentrating devices 141,142 ... 14s, treatment circuit 15, wherein, m and s are the natural number more than or equal to 2.
The light of light source 19 emissions covers and touches detection zone 16, at least the both direction sensor 131,132 ... 13m receives the light and the output continuous electric signal corresponding with the directional information of touch objects of light source 19 emissions, wherein, the directional information of touch objects is for stating the touch objects position with respect to both direction sensor 131 at least, 132 ... the direction of 13m position, at least two concentrating devices 141,142 ... 14s gathers both direction sensor 131 at least with the light of light source 19 emissions, 132 ... 13m, treatment circuit 15 bases are both direction sensing 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, according to the directional information of touch objects, obtain the positional information of touch objects.
In the present embodiment, direction sensor is a kind of photoelectric sensor, when the light of light emitted is not touched that thing blocks and when injecting direction sensor, direction sensor is output not, when the part light of light emitted is touched that thing blocks and can not inject direction sensor the time, the continuous electric signal that direction sensor output is corresponding with the directional information of touch objects.Direction sensor not only can detect the direction of touch objects, and the atomic little direction that can also detect touch objects changes, and therefore, direction sensor has high position resolution, thereby has also improved the position resolution of touch-screen.
In the present embodiment, light source 19 can be at least one luminophor, can also be a kind of special structure, again referring to Fig. 7, it shown in the oval frame detailed structure view of light source 19, light source 19 comprises luminophor 191, light conductor 192 and reflecting plate 193, luminophor 191 places the port of light conductor 192, reflecting plate 193 is formed in the light conductor 192 away from the place, side that touches detection zone 16, reflecting plate 193 is discrete with light conductor 192, the light that luminophor 191 sends is injected light conductor 192 and transmission in light conductor 192, and the part light of transmission penetrates and be distributed in touch detection zone 16 through light conductor 192 after reflecting via reflecting plate 193 again in light conductor 192; Simultaneously, the part light of transmission then directly penetrates and is distributed in touch detection zone 16 through light conductor 192 in light conductor 192.
In the present embodiment, at least the both direction sensor 131,132 ... 13m receives the light and the output continuous electric signal corresponding with the directional information of touch objects of retroreflecting bar 18 reflections, treatment circuit 15 bases are both direction sensor 131 at least, 132 ... the continuous electric signal of 13m output, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, at least the both direction sensor 131,132 ... 13m has high position resolution, therefore, also improved the resolution of touch objects.
Touch-screen the 6th embodiment
In the present embodiment, direction sensor is specifically as follows PSD, in the present embodiment, when the photosurface of PSD all then by rayed, PSD is output not, when the photosurface of PSD has only part to be mapped to by illumination, some is not mapped to by illumination and when forming dim spot area, the continuous position information of PSD output dim spot area on its photosurface is when calculating the positional information of this dim spot area, can adopt three relational expressions among touch-screen second embodiment, not repeat them here.
As shown in Figure 8, structural representation for touch-screen the 6th embodiment of the present invention, be with the difference of structural representation shown in Figure 7, present embodiment can also comprise the touch-screen framework, the touch-screen framework surrounds and touches detection zone 16, and the touch-screen framework comprises first edge 101, second edge 102, the 3rd edge 103 and the 4th edge 104.In addition, in the present embodiment, the quantity of PSD is two, comprises a PSD 171 and the 2nd PSD 172, the one PSD 171 is installed in the angle of cut place at first edge 101 and second edge 102, and the 2nd PSD 172 is installed in the angle of cut place at first edge 101 and the 4th edge 104.In the present embodiment, the quantity of concentrating device is two, is respectively first concentrating device 141 and second concentrating device, 142, the first concentrating devices 141 are installed in a PSD 171 fronts, and second concentrating device 142 is installed in the 2nd PSD 172 fronts.In the present embodiment, light source 19 is installed in second edge 102, the 3rd edge 103 and the 4th edge 104.
In the present embodiment, the structure of treatment circuit 15 is identical with structural representation shown in Figure 4, and the course of work of treatment circuit 15 can not repeat them here referring to touch-screen second embodiment.
In the present embodiment, the one PSD 171 and the 2nd PSD 172 receive the light and the output continuous electric signal corresponding with the directional information of touch objects of the touch objects reflection that touches in the detection zone 16, treatment circuit 15 is according to the continuous electric signal of a PSD 171 and the 2nd PSD 172 outputs, obtain the directional information of touch objects, again according to the directional information of touch objects, obtain the positional information of touch objects, owing to avoided using a large amount of infrared transmitting tubes and infrared receiving tube, therefore, reduced the production cost of touch-screen, in addition, a PSD 171 and the 2nd PSD 172 have high position resolution, therefore, also improved the resolution of touch objects.Touch system embodiment
Touch system embodiment can comprise all the elements among aforementioned all touch-screen embodiment, does not repeat them here.
Display embodiment
As shown in Figure 9, be the structural representation of display embodiment of the present invention, can comprise display unit and touch-screen 93.Wherein, display unit comprises display screen 91 and display frames 92, and touch-screen 93 is installed in display screen 91 fronts, close user's a side, and is positioned at display frames 92 inside.
In addition, touch-screen 93 also can be installed in display frames 92 outsides, and touch-screen 93 can also combine with display frames 92.
Touch-screen 93 can comprise all the elements among aforementioned all touch-screen embodiment, does not repeat them here.
In above-mentioned all embodiment, concentrating device is specifically as follows convex lens or concave mirror.
Technical solutions according to the invention are not limited to the embodiment described in the embodiment.Those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technological innovation scope of the present invention equally.
Claims (20)
1. a touch-screen is characterized in that, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
Extinction bar or reflecting strips are installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted, and described reflecting strips reflexes to the light of described two light emitted outside the described touch detection zone at least;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
2. touch-screen according to claim 1 is characterized in that, also comprises the retroreflecting bar that is installed on the described touch objects.
3. touch-screen according to claim 1 and 2 is characterized in that described direction sensor is specially position sensitive detector.
4. touch-screen according to claim 3 is characterized in that, also comprises the touch-screen framework that surrounds described touch detection zone, and described touch-screen framework comprises first edge, second edge, the 3rd edge and the 4th edge;
The quantity of described position sensitive detector is two, is installed in the angle of cut place at described first edge and described second edge and the angle of cut place at described first edge and described the 4th edge respectively;
The quantity of described concentrating device is two, and each position sensitive detector front has a concentrating device;
The quantity of described light source is two, has a light source near each position sensitive detector;
Described extinction bar is installed in described second edge, described the 3rd edge and described the 4th edge;
The directional information of described touch objects is the line of described touch objects position and two position sensitive detector positions and the angle at described first edge.
5. touch-screen according to claim 4 is characterized in that, described treatment circuit comprises:
Pre-process circuit is connected with described position sensitive detector, and described pre-process circuit carries out pre-service to described continuous electric signal;
Analog to digital conversion circuit is connected with described pre-process circuit, is digital signal with pretreated continuous electrical signal conversion;
Digital signal processing circuit, be connected with analog-digital conversion circuit as described, according to described digital signal, obtain the positional information of described touch objects on the photosurface of described position sensitive detector, according to described positional information, obtain the directional information of described touch objects,, obtain the positional information of described touch objects according to the directional information of described touch objects.
6. a touch-screen is characterized in that, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
7. touch-screen according to claim 6 is characterized in that described direction sensor is specially position sensitive detector.
8. touch-screen according to claim 7 is characterized in that, also comprises the touch-screen framework that surrounds described touch detection zone, and described touch-screen framework comprises first edge, second edge, the 3rd edge and the 4th edge;
The quantity of described position sensitive detector is two, is installed in the angle of cut place at described first edge and described second edge and the angle of cut place at described first edge and described the 4th edge respectively;
Described retroreflecting bar is installed in described second edge, described the 3rd edge and described the 4th edge;
The quantity of described light source is two, has a light source near each position sensitive detector;
The quantity of described concentrating device is two, and each position sensitive detector front has a concentrating device;
The directional information of described touch objects is the line of described touch objects position and two position sensitive detector positions and the angle at described first edge.
9. touch-screen according to claim 8 is characterized in that, described treatment circuit comprises:
Pre-process circuit is connected with described position sensitive detector, and described pre-process circuit carries out pre-service to described continuous electric signal;
Analog to digital conversion circuit is connected with described pre-process circuit, is digital signal with pretreated continuous electrical signal conversion;
Digital signal processing circuit, be connected with analog-digital conversion circuit as described, according to described digital signal, obtain the positional information of described touch objects on the photosurface of described position sensitive detector, according to described positional information, obtain the directional information of described touch objects,, obtain the positional information of described touch objects according to the directional information of described touch objects.
10. a touch-screen is characterized in that, comprising:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
11. touch-screen according to claim 10, it is characterized in that, described light source comprises luminophor, light conductor and reflector element, described luminophor places the port of described light conductor, described reflector element is formed at the interior place, side away from described touch detection zone of described light conductor, the light that described luminophor sends is injected described light conductor and is transmitted in described light conductor, and the part light that transmits in described light conductor is distributed in described touch detection zone after reflecting via described reflector element.
12., it is characterized in that described direction sensor is specially position sensitive detector according to claim 10 or 11 described touch-screens.
13. touch-screen according to claim 12 is characterized in that, also comprises the touch-screen framework that surrounds described touch detection zone, described touch-screen framework comprises first edge, second edge, the 3rd edge and the 4th edge;
The quantity of described direction sensor is two, is installed in the angle of cut place at described first edge and described second edge and the angle of cut place at described first edge and described the 4th edge respectively;
Described light source is installed in described second edge, described the 3rd edge and described the 4th edge;
The quantity of described concentrating device is two, and each position sensitive detector front has a concentrating device;
The directional information of described touch objects is the line of described touch objects position and two position sensitive detector positions and the angle at described first edge.
14. touch-screen according to claim 13 is characterized in that, described treatment circuit comprises:
Pre-process circuit is connected with two position sensitive detectors, and described pre-process circuit carries out pre-service to described continuous electric signal;
Analog to digital conversion circuit is connected with described pre-process circuit, is digital signal with pretreated continuous electrical signal conversion;
Digital signal processing circuit, be connected with analog-digital conversion circuit as described, according to described digital signal, obtain the positional information of described touch objects on the photosurface of described two position sensitive detectors, according to described positional information, obtain the directional information of described touch objects,, obtain the positional information of described touch objects according to the directional information of described touch objects.
15. a touch system is characterized in that, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
Extinction bar or reflecting strips are installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted, and described reflecting strips reflexes to the light of described two light emitted outside the described touch detection zone at least;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
16. a touch system is characterized in that, comprising:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
17. a touch system is characterized in that, comprising:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
18. a display comprises display unit, it is characterized in that, also comprises touch-screen, described touch-screen comprises:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
Extinction bar or reflecting strips are installed in around the described touch detection zone, and described extinction bar absorbs the light of described at least two light emitted, and described reflecting strips reflexes to the light of described two light emitted outside the described touch detection zone at least;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of touch objects reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices are installed in the described sensor of both direction at least front, and each direction sensor front has at least one concentrating device, and described concentrating device gathers described direction sensor with the light of described touch objects reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
19. a display comprises display unit, it is characterized in that, also comprises touch-screen, described touch-screen comprises:
At least two light sources are installed in around the touch detection zone of described touch-screen, and the light of each light emitted covers described touch detection zone;
At least both direction sensor, be installed in the position of contiguous described at least two light sources respectively, has at least one light source near each direction sensor, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of described touch objects of retroreflecting bar reflection, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
Described retroreflecting bar is installed in around the described touch detection zone, and the light of described at least two light emitted is reflexed to the described sensor of both direction at least;
At least two concentrating devices are installed in the described sensor of both direction at least front respectively, and each direction sensor front has at least one concentrating device, and described concentrating device gathers the described sensor of both direction at least with the light of described retroreflecting bar reflection;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
20. a display comprises display unit, it is characterized in that, also comprises touch-screen, described touch-screen comprises:
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
Light source is installed in around the touch detection zone of described touch-screen, and the light of described light emitted covers described touch detection zone;
At least both direction sensor, be installed in respectively around the touch detection zone of described touch-screen, the described sensor of both direction at least receives the light and the output continuous electric signal corresponding with the directional information of touch objects of described light emitted, wherein, the directional information of described touch objects is the direction of described touch objects position with respect to the described sensor of both direction at least position;
At least two concentrating devices, be installed in the described sensor of both direction at least front respectively, each direction sensor front has at least one concentrating device, and described at least two concentrating devices gather the described sensor of both direction at least with the light of described light emitted;
Treatment circuit is connected with the described sensor of both direction at least, and described treatment circuit obtains the directional information of described touch objects according to described continuous electric signal, according to the directional information of described touch objects, obtains the positional information of described touch objects.
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| CN2010101839580A CN102262484A (en) | 2010-05-26 | 2010-05-26 | Touch screen, touch system and display device |
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| CN2010101839580A CN102262484A (en) | 2010-05-26 | 2010-05-26 | Touch screen, touch system and display device |
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