Summary of the invention
Technical problem to be solved by this invention is: by optical splitter, 5 optical receivers and 5 optical encoders that photoelectric switching circuit is formed, substitute 27 optical receivers and 27 photoelectric switching circuits.
For solving the problems of the technologies described above, the present invention adopts: when having adopted button to press, key reflecting surface reflection row signal is during to the optical encoder is made up of optical splitter, 5 optical receivers and 5 photoelectric switching circuits, and optical encoder is exported key.
It is characterized in that: when theoptical splitter 18 that its one or more light output ends point toreceiver 20 respectively has beamsplit light path 16 to form, export keys byoptical splitter 18, thekey reflecting surface 13 corresponding, theoptical encoder 19 that a plurality of photoelectric switching circuit that containsreceiver 20 constitutes withreflector 11.
Optical splitter 18 can be on the key reflectingsurface 13 one or more by certain corresponding Rankine-Hugoniot relations respectively withreceiver 20 corresponding unit reflectings surface 31, also can be one or more by certain corresponding Rankine-Hugoniot relations respectively withreceiver 20 27 groups of corresponding transparent prism, planar-light guide group, 26 groups of optical fibers, 30 groups of light groove reflectings surface.
Key reflectingsurface 13 reflection of its same row comes light toreceiver 20 behindoptical splitter 18, and its beamsplit light path 16 is identical with the corresponding Rankine-Hugoniot relations ofreceiver 20; Key reflectingsurface 13 reflection of different lines comes light toreceiver 20 behindoptical splitter 18, and its beamsplit light path 16 is inequality with the corresponding Rankine-Hugoniot relations ofreceiver 20.
Its beamsplit light path 16 can reflect next light signal toreceiver 20 toreflector 11 respectively by the one or more unit reflecting surface 31 on the key reflectingsurface 13 and form; Also can come extremely to form by its beam split by 13 reflections of key reflecting surface withreceiver 20 correspondingtransparent prism 27, planar-light guide,optical fiber 26, light groove reflecting surface 30 etc. to the light signal ofreflector 11.
Itsoptical splitter 18 was made of 23 3 stacked adding of unit planar-light guide 21, unit planar-light guide 22, unit planar-light guide, and the light input end of each unit planar-light guide ofoptical splitter 18 is corresponding with key reflectingsurface 13 respectively by certain arrangement; The light output end of each unit planar-light guide ofoptical splitter 18 is corresponding one by one withreceiver 20 respectively.
Its unit reflecting surface 31 is the parts on the key reflectingsurface 13, key reflectingsurface 13 by one or more and one ormore receivers 20 one to one unit reflecting surface 31 form, unit reflecting surface 31 reflection comes to form beamsplit light paths 16 to light to thereceiver 20 ofreflector 11.
Its key reflectingsurface 13 end with one or moreoptical fibers 26 respectively is corresponding; The other end ofoptical fiber 26 is corresponding with one ormore receiver 20 1, respectively with different arrangements.
Its key reflectingsurface 13 is corresponding with one or more smooth groove reflecting surface 30 respectively; One or more smooth groove reflectings surface 30 are corresponding with one ormore receiver 20 1, respectively with different arrangements.
Its key reflectingsurface 13 is corresponding with one or moretransparent prism 27 respectively; One or more transparent prism (27) are corresponding with one ormore receiver 20 1, respectively with different arrangements.
Its other end at reflector (11) has the one end corresponding withreflector 11; Theoptical fiber 25 that the other end and opticalfiber receiving tube 24 are corresponding.
Whenreflector 11 adopted the light wave reflector,receiver 20 can be light-sensitive devices such as photo resistance, photodiode, phototriode; Whenreflector 11 adopted electromagnetic wave, sound wave,receiver 20 also can adopt electromagnetic wave, sonic sensor.
The present invention has simple in structure, use that photoelectric cell quantity is little (to be example with computer keyboard, it has 6 row, 21 row, the prior art scheme need contain the photoelectric switching circuit of 21 cover receivers altogether, the present invention only need contain the photoelectric switching circuit of 5 cover receivers, produce 5 a powers key of 2), and receiver does not need directly corresponding with the reflecting surface of row key, the photoelectric switching circuit that contains receiver can be arranged on and reflector, in same printed board of main control chip, it is simply compact that it has circuit structure, production cost is low, easily organize the characteristics of producing in batches, can take seal approach to a fritter printed board easily, reaching integral waterproofing, even the requirement that can in water, use.Frequency optical-mode matrix inputting module can be widely used in fields such as computer keyboard, IC Card Telephone keyboard, Automatic Teller Machine keyboard, all kinds of household appliance remote control, telephone keypad, functional switch, thin film switch cheaply.
Embodiment
Embodiment 1
Constitute by the button of horizontally-arranged row,reflector 11, elastomer 7, housing, key reflectingsurface 13,optical encoder 19, optical input circuit controller (not shown) etc. referring to Fig. 1,2 the present invention.
It is recessed plate shaped to be the middle part referring to Fig. 1panel 3, the panel through hole 9 that uniform horizontally-arranged row are arranged on the concave bottom surface 4 that is square in the middle,base plate 6 is plate shaped,panel 3 connects into hollow and housing that the plate face is parallel to each other withbase plate 6 by fourroot posts 5, and near the lower surface the left part ofbase plate 6 has theleft erect plate 12 that is separately installed withreflector 11,receiver 20.
Referring to the top of Fig. 1 keycap 1 and thekey guide way 2 formation button that is connected, the bottom surface of elastomer 7 is connected with the upper surface ofbase plate 6, its top is connected with the bottom surface of theshoulder 10 ofkey guide way 2, panel through hole 9 on the outer surface of the middle and upper part ofkey guide way 2 and thepanel 3 is slidingly matched, and is crushed on the lower surface of recessed bottom surface 4 at the upper surface of elastomer 7 elastic force effectlower shoulders 10.
Referring to theshoulder 10 downward extensions on thekey guide way 2 of the button of Fig. 1,2 horizontally-arrangeds rowkey reflecting surface 13 is arranged, the through hole that the extension ofshoulder 10 is passed down through elastomer 7 tops penetrates in the base plate through hole 8,
In the time of should making the upper surface ofshoulder 10 be crushed on the lower surface of recessed bottom surface 4, the plane at the axis place of the emission ofreceiver 20,reflector 11, receiving optical signals is lower than somekey reflectings surface 13 of arranging in length and breadth, and somekey reflectings surface 13 of arranging in length and breadth when button is not pressed can not reflect the light signal thatreflector 11 sends.
Should make each row button 1 when pressing respectively, thereflector 11 of Y0 is 13 corresponding with each key reflecting surface of corresponding line Y0 respectively, each key reflecting surface ofY1 reflector 11 and Y1 is 13 corresponding,Y2 reflector 11 is corresponding with eachkey reflecting surface 13 of Y2.
Constitute by the photoelectric switching circuit 33 that containsreceiver 20, key reflectingsurface 13,optical splitter 18 referring to Fig. 2, Figure 12optical encoder 19;Optical splitter 18 was made of 23 3 stacked adding of unit planar-light guide 21, unit planar-light guide 22, unit planar-light guide, and the light input end of each unit planar-light guide ofoptical splitter 18 is corresponding with key reflectingsurface 13 respectively by certain arrangement; The light output end of each unit planar-light guide ofoptical splitter 18 is corresponding one by one withreceiver 20 respectively,
Light input end referring to Fig. 3 unit planar-light guide 21 is corresponding with key reflectingsurface 13 that X1, X2, X5, X6 respectively are listed as respectively; Its light output end is corresponding withb receiver 20.
Light input end referring to Fig. 4 unit planar-light guide 22 is corresponding with key reflectingsurface 13 that X3, X4, X5, X6 respectively are listed as respectively; Its light output end is corresponding with areceiver 20.
Light input end referring to Fig. 5 unit planar-light guide 23 is corresponding with key reflectingsurface 13 that X0, X2, X4, X6 respectively are listed as respectively; Its light output end is corresponding withc receiver 20.
Reflect the light signal thatreflectors 11 send withreflector 11 corresponding eachkey reflecting surface 13, formkey reverberation 14,14 incidents of key reverberation form beamsplit light path 16 within it by unit planar-light guide 21, unit planar-light guide 22, the unit planar-light guide 23 3 stackedoptical splitters 18 that constitute that add.
Should make key reflectingsurface 13 reflection of same row come light toreceiver 20 behindoptical splitter 18, its beamsplit light path 16 is identical with the corresponding Rankine-Hugoniot relations ofreceiver 20; Key reflectingsurface 13 reflection of different lines comes light toreceiver 20 behindoptical splitter 18, and its beamsplit light path 16 is inequality with the corresponding Rankine-Hugoniot relations ofreceiver 20.
Reflector 11 is electrically connected with input circuit controller (not shown).Reflector 11 can be light sources such as common LED, semiconductor laser tube, infrared tube.
The photoelectric switching circuit 33 that containsreceiver 20 referring to Figure 12 is electrically connected with input circuit controller (not shown).Receiver 20 can be light-sensitive devices such as common photo resistance, photodiode, phototriode, and the photoelectric switching circuit 33 that containsreceiver 20 is common photoelectric switching circuit.
When the keycap of arranging in length and breadth 1 was not pressed,receiver 20 did not receive the light signal thatreflector 11 sends referring to Fig. 2; Be pressed to be example with X5Y1 place keycap 1, when the keycap 1 at X5Y1 place is pressed, the elastic force that thekey guide way 2 that keycap 1 promotes to be attached thereto overcomes elastomer 7 moves down, whenkey guide way 2 moves down certain distance, X5Y1key reflecting surface 13 reflections on thekey guide way 2 and the light signal ofcorresponding Y1 reflector 11 emissions of this key, because thekey reflecting surface 13 at X5Y1 place, unit planar-light guide 21 withoptical splitter 18, the light input end correspondence of planar-light guide unit, unit 22,key reverberation 14 entersoptical splitter 18 back beam split, in unit planar-light guide 21, form beamsplit light path 16 in the unit planar-light guide 22 respectively, because unit planar-light guide 21, the light output end of unit planar-light guide 22 respectively withb receiver 20, areceiver 20 is corresponding respectively,input b receiver 20, the light of areceiver 20 amplifies the output high level through photoelectric switching circuit again, because the photoelectric switching circuit output low level that the 20 unglazed inputs of c receiver are attached thereto, photoelectric switching circuit 33 is with the key 110 input circuit controller (not shown)s of X5 row.
The input circuit controller (not shown) of frequency optical-mode matrix inputting module is pressed according to the button 1 of the differentiation of c, b, areceiver 20 place's high-low levels (110): X5 row.
According to the various combination of c, b, areceiver 20 place's high-low levels, determine row, the key corresponding relation of every row is as follows
001--X0 row, 010--X1 row, 011--X2 row, 100--X3 row, 101--X4 row, 110--X5 row, 111--X6 row
Definite employing of its line unit: Y0, Y1,reflector 11 that Y2 is capable are connected, disconnected to input circuit controller (not shown) with several milliseconds frequency according to order,reflector 11 of every connectionscans detection receiver 20 and has or not the light signal input when it sends light signal, connect one-time detection once according to order, the scanning of input circuit controller (not shown) detectsreceiver 20 when thereflector 11 at Y1 place sendslight signal key 110 inputs, thereby input circuit controller (not shown) judgement Y1 line unit cap 1 is pressed.Input circuit controller (not shown) basis: X is pressed thereby Y determines X5Y1 place keycap 1.
Embodiment 2
On lefterect plate 12 tops opticalfiber receiving tube 24 is installed referring to Fig. 6, the light input end ofoptical fiber 25 is positioned at the right ofbase plate 6 and corresponding withreflector 11, and the light output end ofoptical fiber 25 is corresponding with e, f, g opticalfiber receiving tube 24 respectively.
The arrangement mode that adopts Fig. 6 arranged evenly ofoptical fiber 25; When line number Y more also can adoptoptical splitter 18 arrangement schemes of embodiment 1,
Referring to the receiving tube among this figure of Figure 12 20 is opticalfiber receiving tube 24, and the photoelectric switching circuit 33 that contains opticalfiber receiving tube 24 is electrically connected with input circuit controller (not shown).
When key was not pressed, somekey reflectings surface 13 of Pai Lieing can not reflect, interdict the light signal thatreflector 11 sends in length and breadth.Be pressed to be example with X5Y1 place keycap 1, when the keycap 1 at X5Y1 place is pressed, the light signal that X5Y1 placekey reflecting surface 13 sends atreflection reflector 11, when formingkey reverberation 14, the input light of the capableoptical fiber 25 of blocking fY1, with Y0, the capable corresponding respectively eY2 of Y2, the input light of gY0optical fiber 25 is not interdicted, leaded light and eY2 byoptical fiber 25, thereceiving tube 24 of gY0 optical fiber correspondence receives light, fY1 opticalfiber receiving tube 24 can not receive light, the photoelectric switching circuit 33 that contains opticalfiber receiving tube 24 is with code signal input circuit controller (not shown), thereby input circuit controller (not shown) is differentiated: Y1 is capable to have keycap 1 to be pressed.
All the other and embodiment 1 are together
Embodiment 3
Corresponding with key reflectingsurface 13 respectively by certain arrangement referring to Fig. 7optical splitter 18 by its light input end; 26 groups of formations of optical fiber that its light output end is corresponding withreceiver 20 respectively,optical encoder 19 is made of 26 groups of optical fibers, key reflectingsurface 13, the photoelectric switching circuit 33 that contains receiver 20.When the light input end ofkey reverberation 14 incidentoptical fibers 26, beamsplit light path 16 forms at the inner surface ofoptical fiber 26.
One end of one or moreoptical fiber 26 runs through the plate face oferect plate 17, and is corresponding with thekey reflecting surface 13 of each row respectively; After the other end ofoptical fiber 26 is fixing, corresponding withreceiver 20 respectively.
Key reflectingsurface 13 is as follows with the corresponding relation ofreceiver 20
X0key reflecting surface 13--optical fiber 26--areceiver 20
X1key reflecting surface 13--optical fiber 26-b receiver 20
X2key reflecting surface 13--optical fiber 26 (two)--a,b receiver 20
X3key reflecting surface 13--optical fiber 26----c receiver 20
X4key reflecting surface 13--optical fiber (two) 26--a,c receiver 20
X5key reflecting surface 13--optical fiber (two) 26--b,c receiver 20
X6key reflecting surface 13--optical fiber (three) 26----a, b,c receiver 20
All the other and embodiment 1 are together.
Embodiment 4
Arranged corresponding transparent prism and constitute for 27 groups by certain withkey reflecting surface 13,receiver 20 respectively by its prismatic reflection face 28 referring to Fig. 8optical splitter 18,optical encoder 19 is made of 27 groups of transparent prism,key reflecting surface 13, the photoelectric switching circuit 33 that containsreceiver 20.
Whenkey reverberation 14 incident X5-a, X5-b placetransparent prism 27, the prismatic reflection face 28 of twotransparent prism 27 at this place reflects incident light respectively and forms beam splitlight path 16,key reverberation 14 entrance prism reflectings surface 28, formation and a,b receiver 20 corresponding two bundle beam split light paths, 16, two bundle beam splitlight paths 16 are passedtransparent prism 27 incident a, theb receiver 20 in the place ahead.
Key reflecting surface 13 is as follows with the corresponding relation ofprismatic reflection face 28
X0key reflecting surface 13----a prismatic reflection face 28--areceiver 20
X1key reflecting surface 13----b prismatic reflection face 28-b receiver 20
X2key reflecting surface 13----a, b prismatic reflection face 28 (two)--a,b receiver 20
X3key reflecting surface 13-----c prismatic reflection face 28---c receiver 20
X4key reflecting surface 13----a, c prismatic reflection face 28 (two)--a,c receiver 20
X5key reflecting surface 13----b, c prismatic reflection face 28 (two)--b,c receiver 20
X6key reflecting surface 13----a, b, c prismatic reflection face 28 (three)---a, b,c receiver 20
All the other and embodiment 1 are together.
Embodiment 5
Be made of by certain arrangement corresponding relation 30 groups of light groove reflectings surface,receiver 20 referring to Fig. 9optical splitter 18,optical encoder 19 is made of 30 groups of light groove reflectings surface,key reflecting surface 13, the photoelectric switching circuit 33 that containsreceiver 20.
Key reverberation 14 incident light groove reflectings surface 30 are in the interior formation beam splitlight path 16 of a, b light groove 29.
Key reflecting surface 13 is as follows with the corresponding relation of light groove reflecting surface 30
X0key reflecting surface 13----a light groove reflecting surface 30----areceiver 20
X1key reflecting surface 13-----b light groove reflecting surface 30----b receiver 20
X2key reflecting surface 13----a, b light groove reflecting surface 30 (two)----a,b receiver 20
X3key reflecting surface 13-----c light groove reflecting surface 30------c receiver 20
X4key reflecting surface 13----a, c light groove reflecting surface 30 (two)-----a,c receiver 20
X5key reflecting surface 13----b, c light groove reflecting surface 30 (two)-----b,c receiver 20
X6key reflecting surface 13----a, b, c light groove reflecting surface 30 (three)-----a, b,c receiver 20
All the other and embodiment 1 are together.
Embodiment 6
Referring to Figure 10 unit reflecting surface 31 are parts on thekey reflecting surface 13, andkey reflecting surface 13 is made of one or more corresponding withreflector 11,receiver 20 respectively unit reflectings surface 31.Optical splitter 18 is made of by certain corresponding Rankine-Hugoniot relations 31 groups of its unit reflectings surface,receiver 20, andoptical encoder 19 is made of 31 groups of unit reflectings surface,key reflecting surface 13, the photoelectric switching circuit 33 that containsreceiver 20.
Beam splitlight path 16 is formed by one or more unit reflecting surface 31 reflected light signals on thekey reflecting surface 13, when button 1 is pressed, form by the corresponding beam splitlight path 16 of certain Rankine-Hugoniot relations andreceiver 20,receiver 20 corresponding relations with one or more are identical respectively should to make one or more unit reflecting surface 31 ofkey reflecting surface 13 of same row.
Eachkey reflecting surface 13 of X0 row all has a unit reflecting surface 31 corresponding with areceiver 20;
Eachkey reflecting surface 13 of X1 row all has a unit reflecting surface 31 corresponding withb receiver 20;
Eachkey reflecting surface 13 of X2 row all have two respectively with a,b receiver 20 unit reflecting surface 31 one to one;
Eachkey reflecting surface 13 of X3 row all has a unit reflecting surface 31 corresponding withc receiver 20;
Eachkey reflecting surface 13 of X4 row all have two respectively with a,c receiver 20 unit reflecting surface 31 one to one;
Eachkey reflecting surface 13 of X5 row all have two respectively with b,c receiver 20 unit reflecting surface 31 one to one;
Eachkey reflecting surface 13 of X6 row all have three respectively with a, b,c receiver 20 unit reflecting surface 31 one to one.
All the other and embodiment 1 are together.