CN104598081A - Touch screen realized based on total reflection wave technology and touch display device with same - Google Patents
Touch screen realized based on total reflection wave technology and touch display device with same Download PDFInfo
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- CN104598081A CN104598081A CN201310530541.0A CN201310530541A CN104598081A CN 104598081 A CN104598081 A CN 104598081A CN 201310530541 A CN201310530541 A CN 201310530541A CN 104598081 A CN104598081 A CN 104598081A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
- G06F3/0423—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen using sweeping light beams, e.g. using rotating or vibrating mirror
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
A touch screen realized based on a total reflection wave technology comprises a transparent touch substrate, a first light guiding device, a touch control light source, a second light guiding device and a light receiver, wherein the touch substrate comprises an upper surface and a lower surface opposite to the upper surface in parallel; the upper surface is a touch surface; the first light guiding device is arranged below the lower surface of the touch substrate; the touch control light source is arranged below the lower surface of the touch substrate and close to the first light guiding device; the second light guiding device is arranged below the lower surface of the touch substrate; the light receiver is arranged below the lower surface of the touch substrate; the light receiver and the touch control light source are located below the two opposite sides of the touch substrate respectively; the light receiver right faces the second light guiding device; the touch control light source right faces the first light guiding device. The touch screen has the advantages that touch suspension height does not exist, the capacity of resisting intense light interference is high, no wider and higher edge protrusion exist, and narrow edge design is facilitated. The invention further provides a touch display device with the touch screen.
Description
[technical field]
The present invention relates to a kind of touch-screen, particularly relate to a kind of touch-screen of realizing based on total reflection light wave technology and adopt the touch display unit of this touch-screen.
[background technology]
Existing infrared touch system, its adopt mode be all by by being arranged on X along touch area surrounding, Y-direction arranges uniform infrared transmitting tube and infrared receiving tube, infrared transmitting tube and infrared receiving tube is driven, the infrared ray matrix that corresponding scanning formation X-direction and Y-direction are intersected anyhow under the control of control, driving circuit.When there being touch, finger or other object will block the infrared ray anyhow through this point, judge position on the touchscreen, touch point by control system.
At present in infrared touch panel field, as application number be CN200820109789.4, denomination of invention is the Chinese patent application of " a kind of catoptron be applied on touch-screen ", this invention fundamental purpose is: utilize principle of reflection, and the transmitting and receiving element number reduced on infrared touch panel reduces by half; As application number be CN201020271758.6, denomination of invention is the Chinese patent application of " a kind of multi-point touch panel of pure flat structure ", the cardinal principle of this invention is: on the basis of common infrared touch panel, add a light guide plate, for filling the cavity on common touch-screen body touch face, thus reach the effect that surface seems pure flat; As " a kind of infrared touch panel and the multi-point touch locating method thereof " etc. of 200710028616.X.
No matter be single-point or Multi-point infrared touch-screen in above-mentioned traditional infrared touch panel patented technology or product, the basic assembling mode of its infrared touch panel, be all that infrared tube is put on the touch face of touch-screen, in the structure shown here, all there is the problem of following three aspects:
(1) hoverheight is touched higher.Due to the infrared light directive infrared receiving tube sent from infrared transmitting tube, its infrared light mainly concentrates on the middle part of pipe, when touching body and also not touching the glass surface of touch-screen, in fact infrared light is blocked, this touches to respond, this phenomenon is called touch hoverheight in this area, this problem can affect touch feeling, and easily produce misoperation, generally all wish that this value is the smaller the better, but infrared touch panel body now on the market generally there is 2-5mm to touch hoverheight.
(2) ability of anti-intense laser interfere.Existing infrared touch panel, because infrared tube is placed on touch face, outside light is easy to be mapped to infrared receiver, thus affects the normal work of touch-screen, and therefore general screen body all normally can not work under high light (as sunlight or stronger incandescent lamp).
(3) all there is wider and higher edge projection in four limits in infrared touch panel touch face.In existing infrared touch panel field; infrared tube is generally all arranged on the top that screen body touches face; add the thickness of infrared tube operator guards, thus become higher and wider edge protruding at the quadrilateral of screen body, very large restriction is produced to the installation of touch-screen and touch apparatus appearance design.
In addition, although the infrared transmitting tube that there are some traditional light wave touch-screens is not located on touch face, the light that its infrared transmitting tube sends needs from touching the incident sideways of substrate in touch substrate, and from touching another opposite flank injection of substrate, is received by infrared receiving tube.But, because light must be injected, inject from the side of tactile film substrate, need to form wider mask structure in the side of contact panel, cause the border width of touch display unit comparatively large, be unfavorable for the narrow limit touch screen design of current trend.
[summary of the invention]
In view of above-mentioned condition, be necessary to provide a kind of touch-screen realized based on total reflection light wave technology, with solve touch hoverheight, anti-intense laser interfere ability, to there is wider and higher edge protruding and be unfavorable for the problem that narrow limit is designed.
Based on the touch-screen that total reflection light wave technology realizes, it comprises:
Transparent touch substrate, described touch substrate comprises upper surface and relative lower surface parallel with described upper surface, and described upper surface is touch face;
Be located at the first leaded light device of the below of described lower surface, described first leaded light device comprises the first incidence surface, the first exiting surface and the first reflecting surface, described first incidence surface is arranged towards the circumferential outside of described touch substrate, described first exiting surface and described lower surface are oppositely arranged, and more described first incidence surface of described first reflecting surface is arranged near the center of described touch substrate;
Be located at the below of described lower surface and the touch-control light source of close described first leaded light device, described touch-control light source and described first incidence surface are just to setting;
Be located at the second leaded light device of the below of described lower surface, described second leaded light device comprises the second incidence surface, the second exiting surface and the second reflecting surface, described second incidence surface and described lower surface are oppositely arranged, described second exiting surface is arranged towards the circumferential outside of described touch substrate, and more described second exiting surface of described second reflecting surface is arranged near the center of described touch substrate; And
Be located at the optical receiver of the below of described lower surface, described optical receiver lays respectively at the below of the relative both sides of described touch substrate with described touch-control light source, and described optical receiver and described second exiting surface are just to setting;
Wherein, the light that described touch-control light source is launched enters in described first leaded light device from described first incidence surface, and after described first reflective surface, reflection ray is from described first exiting surface injection, and be injected in described touch substrate from described lower surface, form touch-control light; Described touch-control light is totally reflected on described upper surface and described lower surface, make described touch-control light from the internal transmission of described touch substrate to the side relative with described touch-control light source, and enter the second incidence surface of described second leaded light device from described lower surface injection, after described second reflective surface, inject described optical receiver from described second exiting surface.
Above-mentioned touch-screen based on total reflection light wave technology realize, its at least tool have the following advantages:
(1) light that the touch-control light source of above-mentioned touch-screen sends is injected and is touched in substrate, touch substrate inside on penetrate face and under penetrate face formed total reflection, and be transferred to optical receiver, total reflection principle is utilized to make touch-control light in the internal transmission touching substrate, make touch body must be close to the upper surface touching substrate and just can produce touch-responsive, solve the problem touching hoverheight; Further, due to by the internal transmission of touch-control light at touch-screen, touch-control light source do not need to be placed in touch substrate upper surface on, thus realize touch-screen without convex frame, accomplish pure flat structure.In addition, traditional light wave touch-screen touches the upper surface of substrate because touch-control light source is placed in, and therefore the thickness of general coboundary has 4-10mm, but above-mentioned touch-screen, without the need to arranging convex frame, reduces the edge thickness of touch-screen.
(2) the touch-control light source of above-mentioned touch-screen, the first leaded light device, the second leaded light device and optical receiver are all positioned at the below of the lower surface touching substrate, touch-control light is injected from the side of the lower surface touching substrate, and penetrate from another opposite side of the lower surface touching substrate, avoid the projecting circumferential outside touching substrate of touch-control light source, the first leaded light device, the second leaded light device and optical receiver, thus reduce the width of non-see-through area, be beneficial to the narrow limit design of touch display unit.
(3) the touch-control light of above-mentioned touch-screen is in the internal transmission touching substrate, and its light is the mode onwards transmission be totally reflected in inside, therefore, outside light is difficult to have influence on inner touch-control light, compared with prior art, tradition light wave touch-screen can not work under strong light environment, the invention solves the light interference problem of traditional light wave touch-screen.Further, because touch-control light is in the internal transmission touching substrate, can drop to by externalities very low, therefore be conducive to the stability improving touch-screen work.
Wherein in an embodiment, described first reflecting surface is transparent surface, the light that described touch-control light source is launched, and injects described first leaded light device, and be totally reflected on described first reflecting surface from described first incidence surface.
Wherein in an embodiment, region corresponding with described touch-control light source on described lower surface is formed with light shield layer, to touch substrate described in the light therethrough stopping described touch substrate outside and to be irradiated to the region at described touch-control light source place.
Wherein in an embodiment, described first incidence surface is perpendicular to described lower surface, and described first reflecting surface tilts compared to described lower surface, and described first exiting surface is parallel to described lower surface.
Wherein in an embodiment, described first leaded light device is prism.
Wherein in an embodiment, described first exiting surface is close to described lower surface and is arranged;
Or described first exiting surface and described lower surface parallel interval are arranged, and are filled with optical cement between described first exiting surface and described lower surface, and described first leaded light device is fixed on described lower surface by described optical cement.
Wherein in an embodiment, described touch substrate is the acryl resin plate of the glass plate of planar shaped, the acryl resin plate of planar shaped, the glass plate of arc or arc, and the material of described first leaded light device and described second leaded light device is glass or resin;
And/or described touch-control light source is infrared LED illuminating module, and described touch-control light source and described optical receiver one_to_one corresponding are arranged.
Wherein in an embodiment, also comprise the drive circuit board for driving described touch-control light source, described drive circuit board is positioned at the below of described lower surface, and arrange with described touch substrate interval, described first leaded light device and described touch-control light source are clamped between described lower surface and described drive circuit board, and described first reflecting surface exposes to outside described drive circuit board.
Wherein in an embodiment, the structure of described second leaded light device is identical with described first leaded light device structure, and described second leaded light device is arranged according to the mode that the light path of described first leaded light device is converse.
Meanwhile, the present invention also provides a kind of touch display unit adopting above-mentioned touch-screen.
A kind of touch display unit, it comprises:
Above-mentioned touch-screen; And
Be located at the below of described touch substrate and superpose with described touch-screen the display screen arranged.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the touch-screen of embodiment of the present invention;
Fig. 2 is the enlarged drawing of II part in Fig. 1;
Fig. 3 is the enlarged drawing of III part in Fig. 1;
Fig. 4 is the enlarged drawing of IV part in Fig. 1.
[embodiment]
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
Refer to Fig. 1, the touch-screen 100 of one embodiment of the present invention, it realizes touch-control based on total reflection light wave technology, and this touch-screen 110 can be multi-point touch panel.This touch-screen 100 comprises touch substrate 110, first leaded light device 120, touch-control light source 130, second leaded light device 140 and optical receiver 150.The light that touch-control light source 130 is launched, imports to through the first leaded light device 120 and touches in substrate 110, form touch-control light; Touch-control light is transferred to the side at optical receiver 150 place touching generation total reflection in substrate 110; After touch-control light penetrates from touch substrate 110, by the second leaded light device 140 lead-in light receiver 150.When object touches on the touch face of tactile film substrate 110, the total reflection in touch face can be destroyed, thus make the optical receiver 150 corresponding with touch location cannot receive touch-control light, namely learn the coordinate of touch location.
It is transparent for touching substrate 110.Touch substrate 110 and comprise upper surface 111 and relative lower surface 113 parallel with upper surface 111, upper surface 111 is touch face.Touch the acryl resin plate of glass plate, the acryl resin plate of planar shaped, the glass plate of arc or the arc that substrate 110 can be planar shaped.Specifically in the illustrated embodiment in which, touching substrate 110 is the glass plate of planar shaped, and its refractive index is about 1.5.
See also Fig. 2, the first leaded light device 120 is located at the below of lower surface 113.First leaded light device 120 comprises the first incidence surface 121, first exiting surface 123 and the first reflecting surface 125.First incidence surface 121 is arranged towards the circumferential outside touching substrate 110.First exiting surface 123 is oppositely arranged with the lower surface 113 touching substrate 110.First reflecting surface 125 is arranged near the center touching substrate 110 compared with the first incidence surface 121.First leaded light device 120 material is glass or resin, and such as, in the illustrated embodiment in which, the acryl resin that the first leaded light device 120 is about 1.4 by refractive index is made.
Specifically in the illustrated embodiment in which, the first leaded light device 120 is right-angled trapezium prism.The top margin of right-angled trapezium prism is less than base, first incidence surface 121 is positioned at the waist limit, right angle of right-angled trapezium prism, first reflecting surface 125 is positioned at the inclination waist limit of right-angled trapezium prism, first exiting surface 123 is positioned at the base of right-angled trapezium prism, and the light ray parallel that touch-control light source 130 is launched injects the first incidence surface 121 in lower surface 113.
Certainly, in the present invention, the first leaded light device 120 also can be the prism of other shapes, such as, and right-angle triangle prism.
The light that first leaded light device 130 sends, inject from the first incidence surface 121, be totally reflected the first reflecting surface 125, again be totally reflected through the upper surface 111 that the first exiting surface 123 is touching substrate 110, then the lower surface 113 touching substrate 110 is reflexed to again, be totally reflected again, repeatedly so.
It is emphasized that the first guide-lighting components and parts 120 are not limited to transparent components and parts, it can be black, the leaded light device that bronzing etc. can be thoroughly infrared.Leaded light device 120 can not as viewing area with the region that touch-control light source 130 contacts with touch substrate 110, such as, touch-control light source 120 adopts 5mm length, leaded light device 130 is less than 10mm, add up and can not be greater than 15mm, in order to avoid seeing this part structure through touch-control glass in practical application, the top in this part region of contact panel 110 is formed with light shield layer (such as, black silk-screen).
Preferably, the first reflecting surface 125 is transparent surface, the light that touch-control light source 130 is launched, and injects the first leaded light device 120, and be totally reflected on the first reflecting surface 125 from the first incidence surface 121.Because the first reflecting surface 125 is transparent surface, it adopts the mode of total reflection to reflect, and leaded light device 120 cost compare of full impregnated light is low, the cost of plated film can not be increased, and total reflection is the reflection of 100%, and to the loss reduction of light, and how much light of coated reflection exists light losing.
Certainly, in other embodiments, the first reflecting surface 125 also can be alternatively non-transparent face, such as, the first reflecting surface 125 can be provided with and be pasted with reflective membrane or coating one deck reflector layer.Now, the first reflecting surface 125 is light tight, and without the need to specific incident angle, its adjustment incident angle more for convenience.
Further, on the lower surface 113 of touch substrate 110, the region corresponding with touch-control light source 130 is formed with light shield layer, is irradiated to the region at touch-control light source 130 place to stop the light therethrough touching substrate 110 outside to touch substrate 110.Light shield layer can adopt the modes such as silk-screen black out ink, spraying black out ink, stickup shading film to be formed.Because light shield layer can block the light injected outside, the ability of anti-intense laser interfere can be increased better, and can sunlight be resisted, be convenient to this touch-screen 100 of outdoor use.
Further, the first incidence surface 121 tilts compared to the lower surface 113 touching substrate 110 perpendicular to lower surface 113, first reflecting surface 125 touching substrate 110, and the first exiting surface 123 is parallel to the lower surface 113 touching substrate 110.Because the first incidence surface 121 is perpendicular to the lower surface 113 touching substrate 110, first exiting surface 123 is parallel to the lower surface 113 touching substrate 110, so that adjust touch-control light by the first leaded light device 120 to inject incident angle when touching substrate 110, improve the degree of accuracy of touch-control.Further, the first exiting surface 123 is parallel to the lower surface 113 touching substrate 110, to reduce angular error when light enters touch substrate 110 from the first leaded light device 120.
Further, wherein in an embodiment, the first exiting surface 123 is close to and is touched the lower surface 113 of substrate 110 and arrange, and enters air refraction when touching substrate 110, reflection loss to reduce light from the first leaded light device 120.
In another embodiment, the first exiting surface 123 is arranged with lower surface 113 parallel interval touching substrate 110, and is filled with optical cement between the first exiting surface 123 and lower surface 113, and the first leaded light device 120 is fixed on lower surface 113 by optical cement.Owing to adopting optical cement to be directly fixedly connected with the first leaded light device 120, so that touch the slimming design of substrate 110, and increase the translucent effect of touch-screen 100.
Touch-control light source 130 is located at the below of lower surface 113, and near the first leaded light device 120.Touch-control light source 130 and the first incidence surface 121 are just to setting.Concrete touch-control light source 130 is infrared LED illuminating module in the illustrated embodiment in which, and touch-control light source 130 and optical receiver 150 one_to_one corresponding are arranged.
Further, touch-screen 100 also comprises the drive circuit board 160 for driving touch-control light source 130, drive circuit board 160 is positioned at the below of the lower surface 113 touching substrate 110, and and touch substrate 110 interval is arranged, between the lower surface 113 that first leaded light device 120 and touch-control light source 130 are clamped in touch substrate 110 and drive circuit board 160, the first reflecting surface 125 exposes to outside drive circuit board 160.Drive circuit board 160 can play the effect of location touch-control light source 130 and the first leaded light device 120, and can block the light coming from display screen, thus increases the ability of the anti-intense laser interfere of touch-screen 100 further.In addition, because drive circuit board 160 is located at the below touching substrate 110, its water proofing property is comparatively strong, and above-mentioned touch-screen 100 can be used under outdoor rainwater environment.
See also Fig. 3, the second leaded light device 140 is located at the below of lower surface 113.Second leaded light device 140 comprises the second incidence surface 141, second exiting surface 143 and the second reflecting surface 145.Second incidence surface 141 is oppositely arranged with lower surface 113.Second exiting surface 143 is arranged towards the circumferential outside touching substrate 110.Second reflecting surface 145 is arranged near the center touching substrate 110 compared with the second exiting surface 143.The material of the second leaded light device 140 is glass or resin.
Specifically in the illustrated embodiment in which, the structure of the second leaded light device 140 is identical with the first leaded light device 120 structure, and the second leaded light device 140 is arranged according to the mode that the light path of the first leaded light device 120 is converse.
In other words, in the illustrated embodiment in which, the acryl resin that the second leaded light device 140 is about 1.4 by refractive index is made.Second leaded light device 140 is right-angled trapezium prism.The top margin of right-angled trapezium prism is less than base, second exiting surface 143 is positioned at the waist limit, right angle of right-angled trapezium prism, second reflecting surface 145 is positioned at the inclination waist limit of right-angled trapezium prism, second incidence surface 141 is positioned at the base of right-angled trapezium prism, and light ray parallel penetrates the second incidence surface 141 in the lower surface 113 touching substrate 110.Second reflecting surface 145 is transparent surface, the light that touch-control light source 130 is launched, and injects the second leaded light device 140, and be totally reflected on the second reflecting surface 145 from the second incidence surface 141.Second exiting surface 143 tilts compared to the lower surface 113 touching substrate 110 perpendicular to lower surface 113, second reflecting surface 145 touching substrate 110, and the second incidence surface 141 is parallel to the lower surface 113 touching substrate 110.Second incidence surface 141 is close to the lower surface 113 touching substrate 110 and is arranged.Or the second incidence surface 141 is arranged with lower surface 113 parallel interval touching substrate 110, and is filled with optical cement between the second incidence surface 141 and the lower surface 113 touching substrate 110, and the second leaded light device 140 is fixed on lower surface 113 by optical cement.
It should be noted that, the second leaded light device 140 also can be different with the structure of the first leaded light device 120, and such as, the first reflecting surface 125 of the first leaded light device 120 can be transparent surface, and the second reflecting surface 145 of the second leaded light device 140 is alternatively non-transparent face; First leaded light device 120 is the right-angled trapezium prism be made up of glass, and the second leaded light device 140 can for the right-angle triangle prism be formed from a resin.
The below of the lower surface 113 touching substrate 110 is located at by optical receiver 150.Optical receiver 150 and touch-control light source 130 lay respectively at the below of the relative both sides touching substrate 110, and the second exiting surface 143 of optical receiver 150 and the second leaded light device 140 is just to setting.Specifically in the illustrated embodiment in which, optical receiver 150 is infrared electro sense diode module.
Further, on the lower surface 113 of touch substrate 110, the region corresponding with optical receiver 150 is also formed with this light shield layer, is irradiated to the region at optical receiver 150 place to stop the light therethrough touching substrate 110 outside to touch substrate 110.Because light shield layer can block the light injected outside, to increase the ability of anti-intense laser interfere better, and can sunlight be resisted, be convenient to this touch-screen 100 of outdoor use.
Further, touch-screen 100 also comprises the control circuit board 170 for controlling optical receiver 150, control circuit board 170 is positioned at the below of the lower surface 113 touching substrate 110, and and touch substrate 110 interval is arranged, between the lower surface 113 that second leaded light device 140 and optical receiver 150 are clamped in touch substrate 110 and control circuit board 170, the second reflecting surface 145 of the second leaded light device 140 exposes to outside control circuit board 170.Control circuit board 170 can play the effect of location touch-control light source 130 and the second leaded light device 140, and can block the light coming from display screen, to increase the ability of the anti-intense laser interfere of touch-screen 100 further.
Wherein, the light that touch-control light source 130 is launched enters in the first leaded light device 120 from the first incidence surface 121 of the first leaded light device 120, and after the first reflecting surface 125 reflects, reflection ray penetrates from the first exiting surface 123, and being injected into from the lower surface 113 touching substrate 110 touches in substrate 110, forms touch-control light; Touch-control light is totally reflected on upper surface 111 and lower surface 113, make touch-control light from touching the internal transmission of substrate 110 to the side relative with touch-control light source 130, and penetrate from the lower surface 113 touching substrate 110 and enter the second incidence surface 141 of the second leaded light device 140, from the second exiting surface 143 incident light receiver 150 after the second reflecting surface 145 reflects.
Below illustrate the optical principle of above-mentioned touch-screen 100:
Please again consult Fig. 2, the light launched when touch-control light source 130 is injected in the first leaded light device 120 perpendicular to the incidence surface of the first leaded light device 120, light is totally reflected at the first reflecting surface 125 of the first leaded light device 120, the refractive index of the first leaded light device 120 is 1.4, wherein, the angle theta of incident ray and the first reflecting surface 125
1critical value meet following condition:
Please again consult Fig. 3, in like manner, second leaded light device 140 is identical with the structure of the first leaded light device 120, and the mode reversible according to light path is arranged, then the emergent ray of the second reflecting surface 145 of the second leaded light device 140 is perpendicular to the second exiting surface 143, and the critical value of the angle of the emergent ray of the second reflecting surface 145 and the second reflecting surface 145 meets above-mentioned condition.
Please again consult Fig. 4, when touch-control light conducts in touch substrate 110, be totally reflected at the upper surface 111 and lower surface 113 touching substrate 110, the refractive index touching substrate 110 is 1.5, wherein, incident ray and the touch upper surface 111 of substrate 110 and the angle theta of lower surface 113
2critical value meet following condition:
Above-mentioned touch-screen 100 based on total reflection light wave technology realize, its at least tool have the following advantages:
(1) light that the touch-control light source 130 of above-mentioned touch-screen 100 sends is injected and is touched in substrate 110, touch substrate 110 inside on penetrate face and under penetrate face formed total reflection, and be transferred to optical receiver 150, total reflection principle is utilized to make touch-control light in the internal transmission touching substrate 110, make touch body must be close to the upper surface 111 touching substrate 110 and just can produce touch-responsive, solve the problem touching hoverheight; Further, due to by the internal transmission of touch-control light at touch-screen 100, touch-control light source 130 do not need to be placed in touch substrate 110 upper surface 111 on, thus realize touch-screen 100 without convex frame, accomplish pure flat structure.In addition, traditional light wave touch-screen touches the upper surface 111 of substrate 110 because touch-control light source 130 is placed in, and therefore the thickness of general coboundary has 4-10mm, and above-mentioned touch-screen 110 need arrange convex frame, reduces the edge thickness of whole touch-screen.
(2) the touch-control light source 130 of above-mentioned touch-screen 100, first leaded light device 120, second leaded light device 140 and optical receiver 150 are all positioned at the below of the lower surface 113 touching substrate 110, touch-control light is injected from the side of the lower surface 113 touching substrate 110, and penetrate from another opposite side of the lower surface 113 touching substrate 110, avoid touch-control light source 130, first leaded light device 120, second leaded light device 140 and the projecting circumferential outside touching substrate 110 of optical receiver 150, thus reduce the width of non-see-through area, be beneficial to the narrow limit design of touch display unit.
(3) the touch-control light of above-mentioned touch-screen 100 is in the internal transmission touching substrate 110, and its light is the mode onwards transmission be totally reflected in inside, therefore, outside light is difficult to have influence on inner touch-control light, compared with prior art, tradition light wave touch-screen can not work under strong light environment, the invention solves the light interference problem of traditional light wave touch-screen.Further, because touch-control light is in the internal transmission touching substrate 110, can drop to by externalities very low, therefore be conducive to the stability improving touch-screen 100 work.
Meanwhile, the present invention also provides a kind of touch display unit.
This touch display unit comprises above-mentioned touch-screen 100 and display screen, and display screen is located at and is touched the below of substrate 110, and superposes with touch-screen 100 and arrange.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1., based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, comprising:
Transparent touch substrate, described touch substrate comprises upper surface and relative lower surface parallel with described upper surface, and described upper surface is touch face;
Be located at the first leaded light device of the below of described lower surface, described first leaded light device comprises the first incidence surface, the first exiting surface and the first reflecting surface, described first incidence surface is arranged towards the circumferential outside of described touch substrate, described first exiting surface and described lower surface are oppositely arranged, and more described first incidence surface of described first reflecting surface is arranged near the center of described touch substrate;
Be located at the below of described lower surface and the touch-control light source of close described first leaded light device, described touch-control light source and described first incidence surface are just to setting;
Be located at the second leaded light device of the below of described lower surface, described second leaded light device comprises the second incidence surface, the second exiting surface and the second reflecting surface, described second incidence surface and described lower surface are oppositely arranged, described second exiting surface is arranged towards the circumferential outside of described touch substrate, and more described second exiting surface of described second reflecting surface is arranged near the center of described touch substrate; And
Be located at the optical receiver of the below of described lower surface, described optical receiver lays respectively at the below of the relative both sides of described touch substrate with described touch-control light source, and described optical receiver and described second exiting surface are just to setting;
Wherein, the light that described touch-control light source is launched enters in described first leaded light device from described first incidence surface, and after described first reflective surface, reflection ray is from described first exiting surface injection, and be injected in described touch substrate from described lower surface, form touch-control light; Described touch-control light is totally reflected on described upper surface and described lower surface, make described touch-control light from the internal transmission of described touch substrate to the side relative with described touch-control light source, and enter the second incidence surface of described second leaded light device from described lower surface injection, after described second reflective surface, inject described optical receiver from described second exiting surface.
2. as claimed in claim 1 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, described first reflecting surface is transparent surface, the light that described touch-control light source is launched, inject described first leaded light device from described first incidence surface, and be totally reflected on described first reflecting surface.
3. as claimed in claim 1 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, region corresponding with described touch-control light source on described lower surface is formed with light shield layer, to touch substrate described in the light therethrough stopping described touch substrate outside and to be irradiated to the region at described touch-control light source place.
4., as claimed in claim 1 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, described first incidence surface is perpendicular to described lower surface, and described first reflecting surface tilts compared to described lower surface, and described first exiting surface is parallel to described lower surface.
5., as claimed in claim 4 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, described first leaded light device is prism.
6. as claimed in claim 5 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, described first exiting surface is close to described lower surface and is arranged;
Or described first exiting surface and described lower surface parallel interval are arranged, and are filled with optical cement between described first exiting surface and described lower surface, and described first leaded light device is fixed on described lower surface by described optical cement.
7. as claimed in claim 1 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, described touch substrate is the acryl resin plate of the glass plate of planar shaped, the acryl resin plate of planar shaped, the glass plate of arc or arc, and the material of described first leaded light device and described second leaded light device is glass or resin;
And/or described touch-control light source is infrared LED illuminating module, and described touch-control light source and described optical receiver one_to_one corresponding are arranged.
8. as claimed in claim 1 based on the touch-screen that total reflection light wave technology realizes, it is characterized in that, also comprise the drive circuit board for driving described touch-control light source, described drive circuit board is positioned at the below of described lower surface, and arrange with described touch substrate interval, described first leaded light device and described touch-control light source are clamped between described lower surface and described drive circuit board, and described first reflecting surface exposes to outside described drive circuit board.
9. the touch-screen realized based on total reflection light wave technology as described in any one of claim 1 ~ 8, it is characterized in that, the structure of described second leaded light device is identical with described first leaded light device structure, and described second leaded light device is arranged according to the mode that the light path of described first leaded light device is converse.
10. a touch display unit, is characterized in that, comprising:
Touch-screen as described in any one of claim 1 ~ 9; And
Be located at the below of described touch substrate and superpose with described touch-screen the display screen arranged.
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| CN201310530541.0A CN104598081A (en) | 2013-10-30 | 2013-10-30 | Touch screen realized based on total reflection wave technology and touch display device with same |
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| CN201310530541.0A CN104598081A (en) | 2013-10-30 | 2013-10-30 | Touch screen realized based on total reflection wave technology and touch display device with same |
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Application publication date: 20150506 |