CN201535899U - Touch detection device - Google Patents

Abstract

The utility model discloses a touch detection device which comprises a quadrangular detected area, two image acquisition devices and two reflective mirrors. The two image acquisition devices are mounted at two adjacent corners or on two opposite edges of the detected area respectively; the viewing field of each image acquisition device does not cover the whole detected area, however, the whole detected area is positioned inside the viewing fields of the image acquisition devices; the two reflective mirrors are mounted on two opposite edges of the detected area and the reflective surfaces thereof face the detected area; and if the image acquisition devices are mounted at the crooners of the detected area, the two reflective mirrors are mounted on the edges not shared by the corners at which the image acquisition devices are mounted. The touch detection device provided by the utility model can reduce the viewing fields of the image acquisition devices and further reduce the image distortion degree.

Description

A kind of touch detecting apparatus

Technical field

The utility model relates to photoelectric detection technology field, relates in particular to a kind of touch detecting apparatus.

Background technology

Touch system is now very popular, and the touch system that particularly has touch-screen is subjected to liking of the people deeply.The patent of this respect is also quite a lot of, has to use camera to realize touch detection positioning, is the Chinese patent etc. of CN200810115165.8 as the patent No..The visual angle of camera is generally all very big in these patents, and the visual angle of camera just can cover whole detected zone like this, and big its degree of distortion of camera in visual angle is also just big.Thereby all there is the big problem of degree of distortion in these touch systems.

The utility model content

The purpose of this utility model is to provide the touch detecting apparatus that a kind of visual angle is little, degree of distortion is also little, to overcome weak point of the prior art.

A kind of touch detecting apparatus by this purpose design, a kind of touch detecting apparatus, it includes the detected zone of quadrilateral, two image acquisition equipments and two reflective mirrors, it is characterized in that: two image acquisition equipments be installed in respectively on two adjacent angles in detected zone or two relative limits on, the visual field of each image acquisition equipment does not cover whole detected zone fully, but whole detected zone is positioned within the visual field of image acquisition equipment, two reflective mirrors be installed on detected regional two relative limits and reflective surface towards detected zone, if image acquisition equipment is installed on the angle in detected zone, then two reflective mirrors are installed on the non-total limit, two angles that image acquisition equipment is housed.

Further, if two image acquisition equipments are installed in respectively on the limit in detected zone, then two reflective mirrors are installed in respectively on the limit adjacent with limit, image acquisition equipment place.

Further, the detected zone of described quadrilateral is the detected zone of rectangle.

Further, if image acquisition equipment is installed on the limit in detected zone, then described image acquisition equipment is installed on two relative minor faces in the detected zone of quadrilateral.

Further, described two image acquisition equipments are installed in respectively on the Different Plane parallel with detected zone.

Further, on the edge in described detected zone or the angle light source is installed, the light-emitting area of light source is towards detected zone.

Further, described light source is an infrared light supply, and infrared light supply is made of some infraluminescence pipes.

Further, if infrared light supply is installed on the angle in detected zone, then described infraluminescence Guan Yousi group is installed on four angles in detected zone.

Further, every group of infraluminescence pipe in the described infraluminescence pipe that is installed on detected regional four angles includes an infraluminescence pipe or many infraluminescence pipes of installing side by side.

Further, if every group of infraluminescence pipe only includes an infraluminescence pipe, concavees lens are installed in the place ahead of the light-emitting area of every infraluminescence pipe.

In technique scheme, the utility model is being installed two image acquisition equipments on detected regional two adjacent angles or on two relative limits, and cooperate image acquisition equipment that touch objects is carried out detection and location with reflective mirror, so just make the visual angle of each image acquisition equipment needn't cover whole detected zone, in the identical situation in image acquiring device installation site, the utility model can reduce the visual angle of image acquiring device, reduces the image fault degree.

Description of drawings

Fig. 1 is the structural drawing of the utility model embodiment one described a kind of touch detecting apparatus;

Fig. 2 is the synoptic diagram of a kind of concrete structure in the utility model embodiment one mid-infrared light source;

Fig. 3 is the synoptic diagram of the another kind of concrete structure in the utility model embodiment one mid-infrared light source;

Fig. 4 is the structural drawing of the utility model embodiment two described a kind of touch detecting apparatus.

Embodiment

The invention will be further described below in conjunction with specification drawings and specific embodiments.

Fig. 1 is the structural drawing of the utility model embodiment one described a kind of touch detecting apparatus, a kind of touch detecting apparatus shown in Figure 1 includes rectangle detected regional 101,camera 102,reflective mirror 103 andinfrared light supply 104, wherein twocameras 102 are installed in respectively on detected regional 101 two relative minor faces, also just say this two image acquisition equipments---the visual field of eachcamera 102 in thecamera 102 does not cover whole detected regional 101 fully, but whole detected regional 101 are positioned within the visual field of twocameras 102, be that detected regional 101 parts are positioned within the visual field of twocameras 102 simultaneously, another part only is positioned within the visual field of acamera 102, tworeflective mirrors 103 be installed on two opposite side adjacent respectively with limit,camera 102 place and reflective surface towards detected regional 101, promptlyreflective mirror 103 is installed in respectively on detected regional 101 two relative long limits in the present embodiment.Light source is available, generally be installed on the edge or angle in detected zone, the light-emitting area of light source is towards detected zone, light source in the present embodiment isinfrared light supply 104 and is installed on detected regional 101 4 angles that using the purpose ofinfrared light supply 104 is in order to make touch detecting apparatus can adapt to the photoenvironment of various complexity.Light source also can be other light source in actual applications, as strip source etc.If only use infrared light supply to throw light on, then can also increase an infrared filter on the light path of camera, to eliminate the interference of surround lighting.In the utility model, infrared light supply can be made of some infraluminescence pipes, and it can have two class formations: one, as shown in Figure 2, every group all includes many infraluminescence pipes of installing side by side 202, generally is fan-shaped and is installed on the base plate 201, to obtain enough big illumination scattering angle; Its two, as shown in Figure 3, every group all is made of aninfraluminescence pipe 301, in case of necessity in the place ahead of every infraluminescence pipe light-emitting area,concavees lens 302 is installed again to enlarge the scattering angle of infraluminescence pipe, obtains uniform illumination light.Detected in actual applications regional 101 also can be the quadrilateral of other shape, two image acquisition equipments also can be installed on the Different Plane parallel with detected regional 101, so just can reduce the adverse effect that two reflective mirrors are installed relatively and minute surface also brings relatively.Image acquisition equipment in this enforcement is a camera, and also available in actual use other image acquisition equipment obtains the image of touch objects.In the drawings 1, when touch objects only was positioned at the visual field of a camera, shown in the touch objects P among the figure, at this moment the detection and location method of touch objects had been known technology, discloses in many patents, thereby has not elaborated at this.Same when touch objects is positioned at the visual field of two cameras simultaneously, shown in the touch objects Q among the figure, at this moment the detection and location method of touch objects also is a known technology, discloses in many patents, thereby has not also elaborated at this.

Fig. 4 is a specific embodiment of the utility model two, and the difference of a kind of touch detecting apparatus shown in Figure 4 and a kind of touch detecting apparatus shown in Figure 1 is that the installation site of image acquisition equipment and reflective mirror is different.Image acquisition equipment in Fig. 4---camera 102 is installed on detected regional 101 adjacent two angles, andreflective mirror 103 is installed on the non-total limit at adjacent two angles thatcamera 102 is housed.In full accord among touch objects detection and location method and Fig. 1 among Fig. 4, just do not spoken more at this.Image acquisition equipment and reflective mirror are installed among Fig. 4 like this can be reduced the visual angle of image acquisition equipment better, thereby obtain better degree of distortion than image acquisition equipment and reflective mirror are installed among Fig. 1 like that.Image acquisition equipment and reflective mirror also can have other mounting means except the installation method shown in Fig. 1 and Fig. 2, such as among Fig. 1 at the situation that does not change image acquisition equipment, reflective mirror also can be installed on two limits that image acquisition equipment is housed, and promptly reflective mirror is installed on the identical limit, detected zone with image acquisition equipment.

Method described in the utility model is 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 utility model equally.

Claims (10)

1. touch detecting apparatus, it includes the detected zone of quadrilateral, two image acquisition equipments and two reflective mirrors, it is characterized in that: two image acquisition equipments be installed in respectively on two adjacent angles in detected zone or two relative limits on, the visual field of each image acquisition equipment does not cover whole detected zone fully, but whole detected zone is positioned within the visual field of image acquisition equipment, two reflective mirrors be installed on detected regional two relative limits and reflective surface towards detected zone, if image acquisition equipment is installed on the angle in detected zone, then two reflective mirrors are installed on the non-total limit, two angles that image acquisition equipment is housed.

2. a kind of touch detecting apparatus according to claim 1 is characterized in that: if two image acquisition equipments are installed in respectively on the limit in detected zone, then two reflective mirrors are installed in respectively on the limit adjacent with limit, image acquisition equipment place.

3. a kind of touch detecting apparatus according to claim 2 is characterized in that: the detected zone of described quadrilateral is the detected zone of rectangle.

4. a kind of touch detecting apparatus according to claim 2 is characterized in that: if image acquisition equipment is installed on the limit in detected zone, then described image acquisition equipment is installed on two relative minor faces in the detected zone of quadrilateral.

5. a kind of touch detecting apparatus according to claim 2 is characterized in that: described two image acquisition equipments are installed in respectively on the Different Plane parallel with detected zone.

6. according to the described a kind of touch detecting apparatus of one of claim 1 to 5, it is characterized in that: on the edge in described detected zone or the angle light source is installed, the light-emitting area of light source is towards detected zone.

7. a kind of touch detecting apparatus according to claim 6 is characterized in that: described light source is an infrared light supply, and infrared light supply is made of some infraluminescence pipes.

8. a kind of touch detecting apparatus according to claim 7 is characterized in that: if infrared light supply is installed on the angle in detected zone, then described infraluminescence Guan Yousi group is installed on four angles in detected zone.

9. a kind of touch detecting apparatus according to claim 8 is characterized in that: every group of infraluminescence pipe in the described infraluminescence pipe that is installed on detected regional four angles includes an infraluminescence pipe or many infraluminescence pipes of installing side by side.

10. a kind of touch detecting apparatus according to claim 9 is characterized in that: if every group of infraluminescence pipe only includes an infraluminescence pipe, in the place ahead of the light-emitting area of every infraluminescence pipe concavees lens are installed.

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