CN102855021A - Optical touch control device - Google Patents
Optical touch control device Download PDFInfo
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- CN102855021A CN102855021A CN2011101747634A CN201110174763A CN102855021A CN 102855021 A CN102855021 A CN 102855021A CN 2011101747634 A CN2011101747634 A CN 2011101747634A CN 201110174763 A CN201110174763 A CN 201110174763A CN 102855021 A CN102855021 A CN 102855021A
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Abstract
The invention relates to an optical touch control device. The optical touch control device has a sensing area and comprises a plurality of light guiding elements, a light source module, a light sensing element and an auxiliary light guiding element, wherein each of the light guiding elements is provided with a first out-light surface facing the sensing area and comprises a first light guiding element and a second light guiding element; the optical sensing element and the auxiliary light guiding element are arranged between two adjacent ends of the first light guiding element and the second light guiding element; the light sensing element comprises an optical sensing end facing the sensing area; the auxiliary light guiding element is positioned between the light sensing element and the sensing area and is provided with a first in-light surface facing the first light guiding element, a second in-light surface facing the second light guiding element and a second out-light surface facing the sensing area; and the second out-light surface is connected between the first in-light surface and the second in-light surface. By the optical touch control device, a problem of a blind area can be avoided.
Description
Technical field
The invention relates to a kind of contactor control device, and particularly about a kind of optical touch control apparatus.
Background technology
Optical touch control apparatus is one of required electronic component of the realization touch controllable function commonly used.Fig. 1 is existing a kind of structural representation with optical touch control apparatus of three Image Sensors.Please refer to Fig. 1, existing optical touch control apparatus 100 comprises reflecting strips 112a, 112b, 112c, the 112d that is arranged in order along four limits of rectangular path.Optical touch control apparatus 100 also comprises light- emitting component 122a, 122b, 122c, in order to provide light to reflecting strips 112a, 112b, 112c, 112d, wherein light-emitting component 122a is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112b, light-emitting component 122b is arranged between the adjacent both ends of reflecting strips 112b and reflecting strips 112c, and light-emitting component 122c is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112d.The light that reflecting strips 112a, 112b, 112c, 112d provide in order to reflect light- emitting component 122a, 122b, 122c.In addition, optical touch control apparatus 100 also comprises Image Sensor 132a, 132b, 132c, and wherein Image Sensor 132a is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112b, and light-emitting component 122a is disposed on the Image Sensor 132a.Image Sensor 132b is arranged between the adjacent both ends of reflecting strips 112b and reflecting strips 112c, and light-emitting component 122b is disposed on the Image Sensor 132b.Image Sensor 132c is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112d, and light-emitting component 122c is disposed on the Image Sensor 132c.
But there is certain blind area (blind zone) in optical touch control apparatus 100.For instance, as shown in Figure 1, the visual field of Image Sensor 132b (field of view, FOV) contains reflecting strips 112a, 112d, but has the gap between reflecting strips 112a and the reflecting strips 112d so that Image Sensor 132c to be set.Because Image Sensor 132c can't reflection ray, cause Image Sensor 132b can't sense touch point C in zone 150, so regional 150 are so-called blind area.In addition, Image Sensor 132c also has similar blind zone problem when sensing.
In order to address the above problem, existing solution commonly used is to utilize Image Sensor sensing and the light-emitting component of arranging in pairs or groups carry out light filling in turn.For instance, when Image Sensor 132b carries out sensing, light- emitting component 122a, 122b provide the illuminating ray of normal brightness, light-emitting component 122c then provides brightness darker compensation light, to carry out light filling, and then make the brightness in the gap between reflecting strips 112a and the reflecting strips 112d similar to the brightness of reflecting strips 112a, 112d, so can solve the problem of blind area.In like manner, when Image Sensor 132c carries out sensing, then carry out light filling by light-emitting component 122b.
But, can provide according to circumstances illuminating ray or the darker compensation light of brightness of normal brightness in order to make light- emitting component 122b, 122c, need the complicated driving circuit of design, this causes optical touch control apparatus 100 costs to increase.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide a kind of optical touch control apparatus, be positioned at the blind zone problem that the two relative Photosensing Units at diagonal angle have with effective solution, and be conducive to the structure of simplified driving circuit, reduce cost.
The invention provides a kind of optical touch control apparatus, it has sensing region and comprises a plurality of light-guide devices, light source module, Photosensing Units and auxiliary light-guide device.A plurality of light-guide devices are disposed at by a plurality of sides of sensing region, and each light-guide device has the first exiting surface towards sensing region.A plurality of light-guide devices comprise the first light-guide device and the second light-guide device, and the first light-guide device and the second light-guide device are arranged at by two adjacent sides of sensing region.Light source module is in order to provide light to these light-guide devices.Photosensing Units is arranged between the adjacent both ends of the first light-guide device and the second light-guide device, and Photosensing Units comprises the light sensing end towards sensing region.Auxiliary light-guide device is arranged between the adjacent both ends of the first light-guide device and the second light-guide device, and between Photosensing Units and sensing region.Auxiliary light-guide device has the first incidence surface towards the first light-guide device, towards the second incidence surface of the second light-guide device and towards the second exiting surface of sensing region, and the second exiting surface is connected between the first incidence surface and the second incidence surface.
In one embodiment of the invention, this second exiting surface of aforesaid auxiliary light-guide device has non-atomizing (non-haze) zone corresponding with the light sensing end and atomizing zone in addition, non-atomizing zone.
In one embodiment of the invention, aforesaid non-atomizing zone is opening.
In one embodiment of the invention, aforesaid the second exiting surface comprise the first exiting surface that is parallel to the first light-guide device the first plane, be parallel to the second light-guide device the first exiting surface the second plane and be connected in the first plane and the second plane between the 3rd plane, and the light sensing end is towards the 3rd plane.
In one embodiment of the invention, aforesaid each light-guide device is light-strip, and each light-guide device also has the first side and the second side that links to each other with the first exiting surface, and the first side is relative with the second side, the first side is incidence surface, and the second side is the exiting surface of contiguous auxiliary light-guide device.And light source module comprises the first light-emitting component and the second light-emitting component, and the first light-emitting component provides the first side of light to the first light-guide device, and the second light-emitting component provides the first side of light to the second light-guide device.
In one embodiment of the invention, aforesaid optical touch control apparatus also comprises diffusion sheet, be arranged between auxiliary light-guide device and the Photosensing Units, and diffusion sheet has the non-diffusion zone corresponding with the light sensing end.
In one embodiment of the invention, the aforesaid Photosensing Units sensing cell that comprises housing and have the light sensing end.Housing has opening, and sensing cell is arranged in the housing, and exposes the light sensing end from opening, and the surface that exposes the light sensing end of housing is provided with atomization structure.
In one embodiment of the invention, aforesaid auxiliary light-guide device also comprises at least one fixed part, with the fixed light sensing element.
In one embodiment of the invention, aforesaid auxiliary light-guide device and the first light-guide device and/or the second light-guide device are one-body molded.
In one embodiment of the invention, aforesaid auxiliary light-guide device has cavity, and Photosensing Units is arranged in the cavity, and the light sensing end face of Photosensing Units is to the second exiting surface of auxiliary light-guide device.
The present invention also provides a kind of optical touch control apparatus, and it has sensing region, and comprises a plurality of light-guide devices, light source module, Photosensing Units.A plurality of light-guide devices are disposed at by a plurality of sides of sensing region, and these light-guide devices comprise the first light-guide device and the second light-guide device.The first light-guide device and the second light-guide device are arranged at by two adjacent sides of sensing region, and have respectively towards the first exiting surface of sensing region and the second exiting surface that links to each other with the first exiting surface.Wherein, the angle of the second exiting surface and the first exiting surface is acute angle, and these second exiting surfaces of the first light-guide device and the second light-guide device are the adjacent both ends face of the first light-guide device and the second light-guide device.Light source module is in order to providing light to light-guide device, and the second exiting surface of the first light-guide device and the second light-guide device is suitable for the zone between ray guidance to the second exiting surface.Photosensing Units is arranged between the second exiting surface of the first light-guide device and the second light-guide device.Photosensing Units comprises the light sensing end towards sensing region.
In one embodiment of the invention, aforesaid each first light-guide device also has the incidence surface relative with the second exiting surface with the second light-guide device.Light source module comprises the first light-emitting component and the second light-emitting component, and the first light-emitting component provides the incidence surface of light to the first light-guide device, and the second light-emitting component provides the incidence surface of light to the second light-guide device.
In one embodiment of the invention, aforesaid each second exiting surface is provided with a plurality of microstructures.
In one embodiment of the invention, the sensing cell that aforesaid Photosensing Units comprises housing and has the light sensing end, housing has opening, and sensing cell is arranged in the housing, and expose the light sensing end from opening, and the surface that exposes the light sensing end of housing is provided with atomization structure.
In one embodiment of the invention, aforesaid optical touch control apparatus also comprises diffusion sheet, and it is arranged at before the light sensing end, and diffusion sheet has the non-diffusion zone corresponding with the light sensing end.
The invention has the beneficial effects as follows, adopt the optical touch control apparatus of the embodiment of the invention, utilization will further be directed to by the light of adjacent two light-guide device outgoing the Photosensing Units region between the adjacent both ends of adjacent two light-guide devices between Photosensing Units and the sensing region and be arranged at auxiliary light-guide device between the adjacent both ends of adjacent two light-guide devices.Like this, can effectively solve two blind zone problems that relative Photosensing Units has that are positioned at diagonal position, and can simplify the driving circuit of light source module, thereby reduce cost.In addition, in another embodiment of the present invention, the first light-guide device of optical touch control apparatus and the adjacent both ends face of the second light-guide device are the second exiting surface, and the angle towards the first exiting surface of sensing region of itself and the first light-guide device and the second light-guide device is acute angle.Therefore, the first light-guide device and the second light-guide device are suitable for the zone with the Photosensing Units place between the second exiting surface of ray guidance to the first light-guide device and the second light-guide device, be positioned at the blind zone problem that two relative Photosensing Units of diagonal position have with effective solution, and the driving circuit of simplification light source module, thereby reduce cost.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Fig. 1 is existing a kind of structural representation with optical touch control apparatus of three Image Sensors.
Fig. 2 is the plan structure schematic diagram of the optical touch control apparatus of the embodiment of the invention.
Fig. 3 is the schematic perspective view of a kind of Photosensing Units of the embodiment of the invention.
Fig. 4 is the sectional perspective schematic diagram of the optical touch control apparatus of the embodiment of the invention.
Fig. 5 is the sectional perspective schematic diagram of the optical touch control apparatus of another embodiment of the present invention.
Fig. 6 is the local schematic top plan view of the optical touch control apparatus of another embodiment of the present invention.
Fig. 7 is the partial exploded view of the optical touch control apparatus of another embodiment of the present invention.
Fig. 8 is the plan structure schematic diagram of the optical touch control apparatus of the embodiment of the invention.
Fig. 9 is the partial exploded view of the optical touch control apparatus of another embodiment of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and the effect thereof of the optical touch control apparatus that foundation the present invention is proposed are described in detail as follows:
Relevant aforementioned and other technology contents of the present invention, Characteristic can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, the present invention is limited.
Fig. 2 is the plan structure schematic diagram of the optical touch control apparatus of the embodiment of the invention.Please refer to Fig. 2, optical touch control apparatus 200 has sensing region 201, and comprise the other a plurality of light-guide devices 210 of a plurality of sides that are disposed at sensing region 201, the light source module 220 of light to the light-guide device 210 can be provided, be positioned in order to sensing sensing region 201 touch point optical information a plurality of Photosensing Units 230 and in order to auxiliarily with the auxiliary light-guide device 240 of light from Photosensing Units 230 regions corresponding to light-guide device 210 guiding.
Each light-guide device 210 has the first exiting surface 215 towards sensing region 201.In the present embodiment, sensing region 201 is roughly rectangular, therefore, above-mentioned a plurality of light-guide device 210 comprises other the first light-guide device 211, the second light-guide device 212, the 3rd light-guide device 213 and the 4th light-guide device 214 of four sides that is disposed at rectangle sensing region 201.Wherein, the first light-guide device 211 and the second light-guide device 212 are arranged at by two adjacent sides of sensing region 201, the 3rd light-guide device 213 and the 4th light-guide device 214 are arranged at by two other adjacent side of sensing region 201, the 3rd light-guide device 213 is relative with the first light-guide device 211, and the 4th light-guide device 214 is relative with the second light-guide device 212.In the present embodiment, each light-guide device 210(namely, the first light-guide device 211, the second light-guide device 212, the 3rd light-guide device 213 or the 4th light-guide device 214) for example be light-strip, and each light-guide device 210 also has the first side 216 and the second side 217 that links to each other with the first exiting surface 215, the first side 216 is relative with the second side 217, the first side 216 is incidence surface, and the second side 217 is exiting surface.
In the present embodiment, light source module 220 comprises the first light-emitting component 221 and the second light-emitting component 222.The first light-emitting component 221 and the second light-emitting component 222 can be light emitting diode, laser diode or other suitable light-emitting component.The first light-emitting component 221 for example is to be arranged between the adjacent both ends of the first light-guide device 211 and the 4th light-guide device 214, with the first side 216 that light to the first light-guide device 211 is provided and the first side 216 of the 4th light-guide device 214, and light enters in the first light-guide device 211 and the 4th light-guide device 214 via these two the first sides 216.The second light-emitting component 222 for example is to be arranged between the adjacent both ends of the second light-guide device 212 and the 3rd light-guide device 213, with the first side 216 that light to the second light-guide device 212 is provided and the first side 216 of the 3rd light-guide device 213, and light enters in the second light-guide device 212 and the 3rd light-guide device 213 via these two the first sides 216.The quantity that it should be noted that the light-emitting component of light source module 220 is not limited to two, and according to the needs of actual design, the light source module 220 of optical touch control apparatus 200 can comprise more light-emitting components.
In the present embodiment, above-mentioned Photosensing Units 230 can be the Photosensing Units of charge coupled cell (charge coupled device), CMOS Image Sensor (CMOS image sensor) or other kind.These Photosensing Units 230 comprise the first Photosensing Units 231 and the second Photosensing Units 232.Wherein, the first Photosensing Units 231 is arranged between the adjacent both ends of the first light-guide device 211 and the second light-guide device 212, and the second Photosensing Units 232 is arranged between the adjacent both ends of the 3rd light-guide device 213 and the 4th light-guide device 214.Each Photosensing Units 230(namely, the first Photosensing Units 231 or the second Photosensing Units 232) comprise the light sensing end 235 towards sensing region 201.
Fig. 3 is the schematic perspective view of a kind of Photosensing Units of the embodiment of the invention.Please refer to Fig. 3, the sensing cell 237 that each Photosensing Units 230 comprises housing 236 and has light sensing end 235.Housing 236 has opening 238, and sensing cell 237 is arranged in the housing 236, and the light sensing end 235 of sensing cell 237 exposes from the opening 238 of housing 236.Each auxiliary light-guide device 240 is arranged between the corresponding Photosensing Units 230 and sensing region 201.In the present embodiment, optical touch control apparatus 200 comprises two auxiliary light-guide devices 240, is arranged at respectively between the first Photosensing Units 231 and the sensing region 201 and between the second Photosensing Units 232 and the sensing region 201.For the ease of narration, the below will to be arranged at auxiliary light-guide device 240 between the first Photosensing Units 231 and the sensing region 201 as example, describe the structure of assisting light-guide device 240.
Fig. 4 is the sectional perspective schematic diagram of the optical touch control apparatus of the embodiment of the invention.Please cooperate with reference to Fig. 2 and Fig. 4, auxiliary light-guide device 240 is arranged between the adjacent both ends of the first light-guide device 211 and the second light-guide device 222, and between the first Photosensing Units 231 and sensing region 201.
Auxiliary light-guide device 240 has the first incidence surface 241 towards the first light-guide device 211, towards the second incidence surface 242 of the second light-guide device 212 and towards the second exiting surface 243 of sensing region 201, and the second exiting surface 243 is connected between the first incidence surface 241 and the second incidence surface 242.In the present embodiment, the second exiting surface 243 for example comprise the first exiting surface 215 that is parallel to the first light-guide device 211 the first plane 246, be parallel to the second light-guide device 212 the first exiting surface 215 the second plane 247 and be connected in the first plane 246 and the second plane 247 between the 3rd plane 248.
In the present embodiment, light can enter in the auxiliary light-guide device 240 via first incidence surface 241 of assisting light-guide device 240 and the second incidence surface 242 respectively after the second side 217 outgoing of the first light-guide device 211 and the second light-guide device 212, and from assisting the second exiting surface 243 outgoing of light-guide device 240.Therefore, auxiliary light-guide device 240 can with between ray guidance to the first light-guide device 211 and the second light-guide device 212 for the gap that the first Photosensing Units 237 is set, the blind area when eliminating the second Photosensing Units 232 sensing.In like manner, because also being provided with auxiliary light-guide device 240 between the 3rd light-guide device 213 and the 4th light-guide device 214, so the blind area during the first Photosensing Units 231 sensing also can be eliminated.Blind area when in other words, the present embodiment can effectively be eliminated two relative the first Photosensing Units 231 of being positioned at diagonal position and the second Photosensing Units 232 sensing by auxiliary light-guide device 240.In addition, because the present embodiment does not need the luminosity of light source module 220 is carried out modulation, thus can simplify the driving circuit of light source module 220, thus cost reduced.
It is worth mentioning that, in order to make the emitting brightness of the second exiting surface 243 of auxiliary light-guide device 240 more even, the second exiting surface 243 of auxiliary light-guide device 240 for example has non-atomizing (non-haze) zone 244 corresponding with light sensing end 235 and the atomizing zone 245 beyond the non-atomizing zone 244.In the present embodiment, non-atomizing zone 244 for example is the opening that is arranged at the 3rd plane 248, but it also can be the light transmitting surface of non-atomizing.In addition, the first plane 246, the second plane 247 and part the 3rd plane 248 are provided with atomization structure (such as diffusion particle), to form atomizing zone 245.The light sensing end 235 of the first Photosensing Units 231 is towards the 3rd plane 248 of the second exiting surface 243, and over against non-atomizing zone 244.In addition, also another Photosensing Units can be set between the 3rd light-guide device 213 and the second light-guide device 212, and also another Photosensing Units can be set between the 4th light-guide device 214 and the first Photosensing Units 211.
Above-mentioned auxiliary light-guide device 240 can one of them be one-body molded with the first light-guide device 211 or the second light-guide device 212, also can both are one-body molded with the first light-guide device 211 and the second light-guide device 212.In addition, in the embodiment of the light transmitting surface that non-atomizing regional 244 is non-atomizing, the surface of the opening that exposes light sensing end 235 238 ends of the housing 236 of Fig. 3 can be provided with atomization structure.Moreover auxiliary light-guide device 240 can be provided with fixed part, to fix the first Photosensing Units 231.In Fig. 4, fixed part is pickup groove 251 for example, and the first Photosensing Units 231 is sticked in the pickup groove 251.
Below will cooperate again the embodiment of graphic explanation fixed part, but it is not the form that limits fixed part of the present invention.
Fig. 5 is the partial schematic diagram of the optical touch control apparatus of another embodiment of the present invention.See also Fig. 5, optical touch control apparatus 200a and the optical touch control apparatus 200 of the present embodiment are roughly the same, both differences are that the auxiliary light-guide device 240a of optical touch control apparatus 200a has cavity 249 with as fixed part, and the first Photosensing Units 231 is arranged in the cavity 249, and the light sensing end 235 of the first Photosensing Units 231 is towards the non-atomizing zone 244 of auxiliary light-guide device 240a.
Fig. 6 is the local schematic top plan view of the optical touch control apparatus of another embodiment of the present invention.See also Fig. 6, the optical touch control apparatus of the present embodiment and optical touch control apparatus 200 are roughly the same, and the difference of the two is that auxiliary light-guide device 240b also comprises fixed part 252, to fix the first Photosensing Units 231.Fixed part 252 is arranged at the auxiliary light-guide device 240b surface relative with the first Photosensing Units 231.The first Photosensing Units 231 comprises the location structure 239 that cooperates with fixed part 252.The first Photosensing Units 231 is by making location structure 239 and cooperating of fixed part 252 the first Photosensing Units 231 be fixed together with auxiliary light-guide device 240b.In the present embodiment, fixed part 252 is convex cylinder, and location structure 239 corresponding fixed parts 252 are arranged at the housing 236 of the first Photosensing Units 231, and is the hole clipping structure that cooperates with convex cylinder.Like this, the fixed part 252 that is convex cylinder embeds the location structure 239 that is the hole clipping structure, so that the first Photosensing Units 231 is fixed in auxiliary light-guide device 240b.
Fig. 7 is the partial exploded view of the optical touch control apparatus of another embodiment of the present invention.See also Fig. 7, optical touch control apparatus 200c and the optical touch control apparatus 200 of the present embodiment are roughly the same, and both differences are that optical touch control apparatus 200c also comprises diffusion sheet 260.Diffusion sheet 260 is arranged between auxiliary light-guide device 240c and the first Photosensing Units 231.Diffusion sheet 260 has the non-diffusion zone 262 corresponding with the light sensing end 235 of the first Photosensing Units 231.This non-diffusion zone 262 for example is opening.The first plane 246c, the second plane 247c and the 3rd plane 248c of the second exiting surface 243c of auxiliary light-guide device 240c are not provided with atomization structure.Certainly, the present embodiment also can adopt auxiliary light-guide device 240, just this moment diffusion sheet 260 non-diffusion zone 262 should be corresponding with the non-atomizing regional 244 of the second exiting surface 243 of auxiliary light-guide device 240.
Fig. 8 is the plan structure schematic diagram of the optical touch control apparatus of the embodiment of the invention.Please cooperate with reference to Fig. 8, the optical touch control apparatus 300 of the present embodiment has sensing region 301, and comprises the other a plurality of light-guide devices 310 of a plurality of sides that are disposed at sensing region 301, the light source module 320 of light to the light-guide device 310 can be provided, be positioned at a plurality of Photosensing Units 330 of optical information of the touch point of sensing region 301 in order to sensing.
Each light-guide device 310 has towards the first exiting surface 315 of sensing region 301 and the second exiting surface 317 of linking to each other with the first exiting surface 315.In the present embodiment, sensing region 301 is roughly rectangular, therefore, above-mentioned a plurality of light-guide device 310 comprises other the first light-guide device 311, the second light-guide device 312, the 3rd light-guide device 313 and the 4th light-guide device 314 of four sides that is disposed at rectangle sensing region 301.Wherein, the first light-guide device 311 and the second light-guide device 312 are arranged at by two adjacent sides of sensing region 301, the 3rd light-guide device 313 and the 4th light-guide device 314 are arranged at by two other adjacent side of sensing region 301, the 3rd light-guide device 313 is relative with the first light-guide device 311, and the 4th light-guide device 314 is relative with the second light-guide device 312.
In the present embodiment, each light-guide device 310(namely, the first light-guide device 311, the second light-guide device 312, the 3rd light-guide device 313 or the 4th light-guide device 314) for example be light-strip.Wherein, the second exiting surface 317 of the first light-guide device 311 and the second light-guide device 312 is the adjacent both ends face of the first light-guide device 311 and the second light-guide device 312, and the second exiting surface 317 of the 3rd light-guide device 313 and the 4th light-guide device 314 is the adjacent both ends face of the 3rd light-guide device 313 and the 4th light-guide device 314.The second exiting surface 317 of each light-guide device 310 and the angle α of the first exiting surface 315 are acute angle.In addition, each light-guide device 310 also has respectively the incidence surface 316 relative with the second exiting surface 317, and each light-guide device 310 is suitable for ray guidance to sensing region 301.
Above-mentioned Photosensing Units 330 can be the Photosensing Units of charge coupled cell, CMOS Image Sensor or other kind.These Photosensing Units 330 comprise the first Photosensing Units 331 and the second Photosensing Units 332.The first Photosensing Units 331 is arranged between the second exiting surface 317 of the first light-guide device 311 and the second light-guide device 312.The second Photosensing Units 332 is arranged between the second exiting surface 317 of the 3rd light-guide device 313 and the 4th light-guide device 314.Each Photosensing Units 330(namely, the first Photosensing Units 331 or the second Photosensing Units 332) comprise the light sensing end 335 towards sensing region 301.The structure of Photosensing Units 330 and Fig. 3 and Photosensing Units 230 structural similarities shown in Figure 4 do not repeat them here.
In the present embodiment, because the second exiting surface 317 of each light-guide device 310 and the angle α of the first exiting surface 315 are acute angle, so from the light 323 of the second exiting surface 317 outgoing of the first light-guide device 311 and the second light-guide device 312 can be refracted between the second exiting surface 317 of the first light-guide device 311 and the second light-guide device 312 in order to the zone of the first Photosensing Units 331 to be set, the blind area in the time of eliminating like this second Photosensing Units 332 sensing.In like manner, from the light 323 of the second exiting surface 317 outgoing of the 3rd light-guide device 313 and the 4th light-guide device 314 can be refracted between the second exiting surface 317 of the 3rd light-guide device 313 and the 4th light-guide device 314 in order to the zone of the second Photosensing Units 332 to be set, the blind area in the time of eliminating like this first Photosensing Units 331 sensing.Blind area when in other words, the present embodiment can effectively be eliminated two relative the first Photosensing Units 331 of being positioned at diagonal position and the second Photosensing Units 332 sensing.In addition, because the present embodiment does not need the luminosity of light source module 320 is carried out modulation, thus can simplify the driving circuit of light source module 320, thus cost reduced.
It is worth mentioning that, the second exiting surface 317 of each light-guide device 310 can be provided with a plurality of microstructure (not shown), with diffusing light 323.Fig. 9 is the partial exploded view of the optical touch control apparatus of another embodiment of the present invention.See also Fig. 9, optical touch control apparatus 300a and the optical touch control apparatus 300 of the present embodiment are roughly the same, and both differences are that optical touch control apparatus 300a also comprises diffusion sheet 360.Diffusion sheet 360 is arranged at before the light sensing end 335 of corresponding Photosensing Units 330.As shown in Figure 9, diffusion sheet 360 is arranged at before the light sensing end 335 of the first Photosensing Units 331, and diffusion sheet 360 has the non-diffusion zone 362 corresponding with light sensing end 335, and this non-diffusion zone 362 for example is opening.
In sum, optical touch control apparatus utilization in the embodiment of the invention will further be directed to by the light of adjacent two light-guide device outgoing the Photosensing Units region between the adjacent both ends of adjacent two light-guide devices between Photosensing Units and the sensing region and be arranged at auxiliary light-guide device between the adjacent both ends of adjacent two light-guide devices.Like this, can effectively solve two blind zone problems that relative Photosensing Units has that are positioned at diagonal position, and can simplify the driving circuit of light source module, thereby reduce cost.In addition, in another embodiment of the present invention, the first light-guide device of optical touch control apparatus and the adjacent both ends face of the second light-guide device are the second exiting surface, and the angle towards the first exiting surface of sensing region of itself and the first light-guide device and the second light-guide device is acute angle.Therefore, the first light-guide device and the second light-guide device are suitable for the zone with the Photosensing Units place between the second exiting surface of ray guidance to the first light-guide device and the second light-guide device, be positioned at the blind zone problem that two relative Photosensing Units of diagonal position have with effective solution, and the driving circuit of simplification light source module, thereby reduce cost.
The above, only be embodiments of the invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (15)
1. optical touch control apparatus, it is characterized in that: described optical touch control apparatus has sensing region, and comprise a plurality of light-guide devices, can provide light to the interior light source module of described a plurality of light-guide devices, Photosensing Units, and auxiliary light-guide device, described a plurality of light-guide device is disposed at by a plurality of sides of described sensing region, each described light-guide device has the first exiting surface towards described sensing region, described a plurality of light-guide device comprises the first light-guide device and the second light-guide device, and described the first light-guide device and the second light-guide device are arranged at by two adjacent sides of described sensing region; Described Photosensing Units is arranged between the adjacent both ends of described the first light-guide device and the second light-guide device, and described Photosensing Units comprises the light sensing end towards described sensing region; Described auxiliary light-guide device is arranged between the adjacent both ends of described the first light-guide device and the second light-guide device, and between described Photosensing Units and described sensing region, described auxiliary light-guide device has the first incidence surface towards described the first light-guide device, towards the second incidence surface of described the second light-guide device and towards the second exiting surface of described sensing region, and described the second exiting surface is connected between described the first incidence surface and described the second incidence surface.
2. optical touch control apparatus according to claim 1 is characterized in that: the second exiting surface of described auxiliary light-guide device has the non-atomizing zone corresponding with described light sensing end and is positioned at atomizing zone beyond the described non-atomizing zone.
3. optical touch control apparatus according to claim 2 is characterized in that: described non-atomizing zone is opening.
4. optical touch control apparatus according to claim 1, it is characterized in that: described the second exiting surface comprise the first exiting surface that is parallel to described the first light-guide device the first plane, be parallel to described the second light-guide device the first exiting surface the second plane and be connected in the 3rd plane between described the first plane and the second plane, and described light sensing end is towards described the 3rd plane.
5. optical touch control apparatus according to claim 1, it is characterized in that: described respectively this light-guide device is light-strip, and respectively this light-guide device also has the first side and the second side that links to each other with described the first exiting surface, described the first side is relative with described the second side, described the first side is incidence surface, described the second side is the exiting surface of contiguous described auxiliary light-guide device, and described light source module comprises the first light-emitting component and the second light-emitting component, described the first light-emitting component provides first side of light to described the first light-guide device, and described the second light-emitting component provides first side of light to described the second light-guide device.
6. optical touch control apparatus according to claim 1, it is characterized in that: described optical touch control apparatus also comprises diffusion sheet, it is arranged between described auxiliary light-guide device and the described Photosensing Units, and described diffusion sheet has the non-diffusion zone corresponding with described light sensing end.
7. optical touch control apparatus according to claim 1, it is characterized in that: the sensing cell that described Photosensing Units comprises housing and has described light sensing end, described housing has opening, described sensing cell is arranged in the described housing, and expose described light sensing end from described opening, and the surface that exposes described light sensing end of described housing is provided with atomization structure.
8. optical touch control apparatus according to claim 1, it is characterized in that: described auxiliary light-guide device also comprises at least one fixed part, with fixing described Photosensing Units.
9. optical touch control apparatus according to claim 1, it is characterized in that: described auxiliary light-guide device and described the first light-guide device and/or described the second light-guide device are to be made of one piece.
10. optical touch control apparatus according to claim 1, it is characterized in that: described auxiliary light-guide device has cavity, and described Photosensing Units is arranged in the described cavity, and the light sensing end face of described Photosensing Units is to the second exiting surface of described auxiliary light-guide device.
11. optical touch control apparatus, it is characterized in that: described optical touch control apparatus has sensing region, and comprise a plurality of light-guide devices, can provide light to the interior light source module of described a plurality of light-guide devices, and Photosensing Units, described a plurality of light-guide device is disposed at by a plurality of sides of described sensing region, described a plurality of light-guide device comprises the first light-guide device and the second light-guide device, described the first light-guide device and the second light-guide device are arranged at by two adjacent sides of described sensing region, described the first light-guide device has respectively towards the first exiting surface of described sensing region and the second exiting surface that links to each other with described the first exiting surface with the second light-guide device, the angle of wherein said the second exiting surface and described the first exiting surface is acute angle, and these second exiting surfaces of described the first light-guide device and described the second light-guide device are the adjacent both ends face of described the first light-guide device and described the second light-guide device, and these second exiting surfaces of described the first light-guide device and described the second light-guide device are suitable for ray guidance to the zone between these second exiting surfaces; Described Photosensing Units is arranged between these second exiting surfaces of described the first light-guide device and described the second light-guide device, and described Photosensing Units comprises the light sensing end towards described sensing region.
12. optical touch control apparatus according to claim 11, it is characterized in that: described each described first light-guide device also has the incidence surface relative with described the second exiting surface with the second light-guide device, described light source module comprises the first light-emitting component and the second light-emitting component, described the first light-emitting component provides the incidence surface of light to described the first light-guide device, and described the second light-emitting component provides the incidence surface of light to described the second light-guide device.
13. optical touch control apparatus according to claim 11 is characterized in that: each described second exiting surface is provided with a plurality of microstructures.
14. optical touch control apparatus according to claim 11, it is characterized in that: the sensing cell that described Photosensing Units comprises housing and has described light sensing end, described housing has opening, described sensing cell is arranged in the described housing, and expose described light sensing end from described opening, and the surface that exposes described light sensing end of described housing is provided with atomization structure.
15. optical touch control apparatus according to claim 11 is characterized in that: described optical touch control apparatus also comprises diffusion sheet, and it is arranged on before the described light sensing end, and described diffusion sheet has the non-diffusion zone corresponding with described light sensing end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110174763.4A CN102855021B (en) | 2011-06-27 | 2011-06-27 | Optical touch control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110174763.4A CN102855021B (en) | 2011-06-27 | 2011-06-27 | Optical touch control device |
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| CN102855021A true CN102855021A (en) | 2013-01-02 |
| CN102855021B CN102855021B (en) | 2015-05-13 |
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Cited By (1)
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|---|---|---|---|---|
| CN105511691A (en) * | 2014-09-18 | 2016-04-20 | 纬创资通股份有限公司 | Optical touch sensing device and touch signal judgment method thereof |
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| CN102855021B (en) | 2015-05-13 |
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