CN200959297Y

CN200959297Y - Coding keyboard

Info

Publication number: CN200959297Y
Application number: CN 200620130963
Authority: CN
Inventors: 王彤
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-23
Filing date: 2006-07-22
Publication date: 2007-10-10
Anticipated expiration: 2016-07-22

Abstract

A password keyboard is provided with a disorder display keyboard component which is mainly composed of a digital display circuit board, an occlusion layer which can limit from different angles and a touch screen layer. The occlusion layer is provided on the position of 2 to 50 mm away from the digital display circuit board. A transparent chamber is provided above every digital display module which is corresponding to the circuit board and the other part is opaque. The size of the transparent chamber is larger than the display character of the digital display module below. The touch screen layer is provided on the occlusion layer. The character of the keyboard press key is displayed by the circuit and is arranged at random every time. Thus the operator can see the clear and complete characters without being disturbed by other stray light. As some strokes of the character are blocked, other people may not judge most of the information displayed and then can not acquire the input password. The utility model is easy to operate, thereby providing people with great convenience and security.

Description

A kind of code keypad

Technical field:

The utility model relates to the keyboard technique field, particularly a kind of peep-proof password keyboard.

Background technology

Code keypad is widely used in the place that bank counter, cash dispenser need be inputed password, but at present what adopt is that a kind of each key position is fixed more, opens wide or the keyboard of semi-open-type.The password of operator's input is easily peeped by the next door people.The defective that the ubiquity privacy degrees is not high.This also causes certain psychological pressure to the user, if he attempts to block with health or other article onlooker's sight line, causes a lot of inconvenience again.

In patent 200420045735.8, announced a kind of anti-keyboard of peeping, it has adopted a kind of out of order keyboard, but the method for its restriction visible angle is that three-dimensional visible angle confinement block is set, there is " visible angle confinement block " side reflective phenomenon in it, when onlooker's angle was observed, stroke that out of order keyboard is bright and the stroke that does not work had obvious difference, though he can not directly see all strokes like this, but still have the possibility of judging displaying contents, leave the hidden danger of divulging a secret.Its structure is comparatively complicated simultaneously, and inconvenience is produced.

In patent 94211905.3, announced a kind of out of order keyboard, the grating peep-proof device that adopts perpendicular type louver (-vre) to form, but this character that normal user is seen is also cut apart by grid, add the reflective of grid side, can make whole display effect more mixed and disorderly, these all recognize that to the operator character display causes some inconvenience, and particularly the elderly for dysphotia, delay of response more causes certain difficulty.The making of its louver (-vre) and assembling is comparatively loaded down with trivial details is unfavorable for large-scale production.

Summary of the invention:

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to propose a kind of code keypad, the keyboard character show to be produced by circuit, and random alignment all at every turn, and the character display that normal running person is seen is clear, complete, and there is not the interference of other mixed and disorderly light, and other people are blocked because of character part stroke, thereby can't judge most of displaying contents, and can't learn the content of the password of key entry, simple, bring the great convenience and the sense of security to people.

In order to realize the foregoing invention purpose, the utility model adopts following technical scheme:

Described code keypad, mainly by digital display circuit board, the barrier bed of visible angle restriction and touch screen layer are formed; Barrier bed is placed on 2～50 millimeters places of digital display circuit board top, and its each digital display module top position corresponding to circuit board is provided with transparency window, and remainder is opaque, and its transparency window size is greater than the character display of the digital display module of its below; Touch screen layer be placed on barrier bed above.

Described code keypad, its digital display circuit board, by single-chip microcomputer (STC89C54), communication interface circuit, sound circuit, touch screen interface circuit, the digital demonstration and drive circuit, electrify restoration circuit is formed; Establish ten digital display modules on the digital display circuit board, divide two groups to form the 2*5 matrix, P2.0～the P2.4 of single-chip microcomputer is respectively through current-limiting resistance to five a PNP transistor base, drive the column signal of digital display module by triode, P0.0～the P0.6 of single-chip microcomputer and P1.0～P1.6 are respectively by behind the drive integrated circult DM74LS04N, drive the capable signal of digital display module again through current-limiting resistance, single-chip microcomputer is by the demonstration of ten charactrons of scan mode control; At first when accessing to your password keyboard each time, single-chip microcomputer P0.7 or positive pulse signal of P1.7 output are to trigger end TR2, the TR1 of integrated circuit KD01, trigger speech IC, the voice signal of speech IC output arrives transistor base by output OUT through current-limiting resistance, drives loudspeaker and sends suggestion voice; Ten digital display modules of Single-chip Controlling show 0～90 numeral respectively, but all generations at random at every turn of each digital display position, thereby all produce a keyboard combination at random at every turn; The user presses the numeral of password correspondence in the face of showing the keyboard that forms by circuit on touch-screen; Single-chip microcomputer is gathered touch signal by four-wire ohm touch-screen translation interface chip ADS7843: single-chip microcomputer connects ADS7843 input end of clock (CLK) by P3.5, signal (CS) is selected in P3.4 contact pin, P3.3 connects signal input part (DIN), P3.2 connects signal output part (DOUT), and four incoming lines of touch-screen are received ADS7843 touch screen interface X+, X-, Y+, Y-by connector J2; Single-chip microcomputer is by control ADS7843 sampling, and when having button to press, obtain the button coordinate, because of a certain coordinate range on all corresponding touch-screen of each digital display module, single-chip microcomputer is judged the digital display module of the position correspondence that the user presses according to the coordinate that reads in, thereby draws password key assignments that the user this time keys in; Single-chip microcomputer can mail to main frame by communication interface with password: the communication interface circuit is a level shifting circuit, constitute by MAX232 and peripheral electric capacity thereof, the T1IN of the P3.1 termination MAX232 of single-chip microcomputer, by MAX232 the Transistor-Transistor Logic level conversion of signals is become the RS232 level signal, hold connector J1 tripod by TIOUT, mail to main frame through external cable again, the R1IN of signal that the while main frame is sent from connector J1 the 4th pin to MAX232, its RS232 level converts the Transistor-Transistor Logic level signal to by MAX232, is outputed to the P3.0 of single-chip microcomputer by R1OUT;

Described code keypad, the barrier bed of its visible angle restriction, its each digital display module top position at circuit board is provided with transparency window, and remainder is opaque; Its transparency window size is greater than the character display of the digital display module of its below.

Described code keypad, its digital display module can be the LED charactron, also can be liquid crystal display device.

Described code keypad, " cancellation " of its password key, " affirmation " functionality buttons can directly be printed on the aspect of blocking.

Described code keypad, its touch-screen also can be established mechanical key with the next door of each digital display module and replace.

Owing to adopted technical scheme as mentioned above, the utlity model has following good effect:

This code keypad, when bank counter uses, the position of each key is a displaying contents, because the control and treatment of circuit, each all is at random, make the character display of seeing that the operator that is on the normal position can be clear, complete, and there is not the interference of other mixed and disorderly light, and the bystander departs from the visual range that transparency window limits because of eyes, all or part of being blocked because of character part stroke, can not intactly see all strokes, thereby can't judge most of displaying contents, also just can't learn the password of key entry.The operator can be relieved, key feeding cipher at leisure, needn't worry that password is stolen.

Description of drawings:

Fig. 1 is the overall structure schematic diagram of code keypad;

Fig. 2 is code keypad control section circuit theory diagrams;

Fig. 3 is code keypad display part circuit theory diagrams;

Fig. 4 is code keypad display driving part circuit theory diagrams;

Among Fig. 1: the digital display control circuit plate of 1-keyboard, 2-barrier bed, 3-touch-screen, 4-barrier bed transparency window, 5-barrier bed opaque section, the digital character on the 6-charactron, 7-charactron.

Embodiment:

Code keypad as shown in fig. 1, the below is digital display circuit board (1), ten charactrons (7) are housed on the circuit board, the charactron top is barrier bed (2), it is a slice plastic film, establishes ten transparency windows (4) with ten the charactron correspondence positions in below, and other parts (5) are opaque, the last plane of charactron (7) and barrier bed (2) leave 2～50 millimeters spacings, and barrier bed (2) top is transparent touch screen (3).

During each the use, at first main frame sends starting command, it is the RS232 level signal, R1IN by connector J1 the 4th pin MAX232 (IC4) in the communication interface circuit, the communication interface circuit is a level shifting circuit, by MAX232 (IC4) and peripheral electric capacity (C3 thereof, C4, C5, C6) constitute, the T1IN of the P3.1 termination MAX232 of single-chip microcomputer, by MAX232 the Transistor-Transistor Logic level conversion of signals is become the RS232 level signal, hold connector J1 tripod by TIOUT, mail to main frame through external cable again, the R1IN of signal that the while main frame is sent from connector J1 the 4th pin to MAX232, its RS232 level converts the Transistor-Transistor Logic level signal to by MAX232, is outputed to the P3.0 of single-chip microcomputer by R1OUT; Single-chip microcomputer (IC1 STC89C54) receive main frame send after the starting command, at P1.7 or pulse signal of P0.7 output, trigger end TR2, TR1 to integrated circuit (IC3KD01), trigger speech IC (IC3 KD01), speech IC (IC3KD01) output is through resistance R 7 control triode T6 base stages, and triode T6 drives loudspeaker and sends required voice: " please input password! " or " please import once again! ", remind the user; Ten charactrons of single-chip microcomputer (IC1 STC89C54) control show 0～90 numeral then, but each digital display position produces at random, thereby produce a keyboard combination at random; Ten charactrons divide two groups of (LED1～LED5, LED6～LED10), per five is one group, seven sections control line abcdefg of five charactrons of every group are in parallel respectively, connect respectively again behind seven current-limiting resistance R8～R14 and the R15～R21, drive by DM74LS04N, and the DM74LS04N input is controlled by the P1.0～P1.6 of single-chip microcomputer and P0.0～P0.6 respectively; First public anode to the 5th charactron of two groups of charactrons driven by triode T1～T5 respectively, and the base stage of triode T1～T5 is controlled by resistance R 1～R5 by the P2.0～P2.4 of single-chip microcomputer respectively; Single-chip microcomputer can be controlled the demonstration of ten charactrons by scan mode like this: Single-chip Controlling T1 conducting, T2～T5 end, every group first charactron public anode energized like this, and all the other four then do not have.At this moment single-chip microcomputer is sent the video data of these two charactrons by P1.0～P1.6 and P0.0～P0.6, and after DM74LS04N drove, first charactron of every group can show required content; In like manner control T2 conducting, T1, T3, T4, T5 and end, single-chip microcomputer is sent the video data of this second charactron by P1.0～P1.6 and P0.0～P0.6, and second charactron of every group can show required content; The rest may be inferred, and single-chip microcomputer scans demonstration fast, because of persistence of vision phenomenon, and the imperceptible flicker of observer, and think that charactron shows simultaneously; Just occurring one like this in face of the user has charactron to show " keyboard " that forms, and the user is by touch-screen (3) key feeding cipher; Single-chip microcomputer is gathered touch signal by four-wire ohm touch-screen translation interface chip (IC2 ADS7843), and (3) four incoming lines of touch-screen are received ADS7843 touch screen interface X+, X-, Y+, Y-by connector J2; Single-chip microcomputer connects ADS7843 input end of clock (CLK) by P3.5, signal (CS) is selected in P3.4 contact pin, P3.3 connects signal input part (DIN), P3.2 connects signal output part (DOUT), control ADS7843 sampling, and when having button to press, obtain the button coordinate, because of all corresponding touch-screen certain limit of every charactron, single-chip microcomputer is judged the charactron of the button correspondence that the user presses according to coordinate, thereby draws password key assignments that the user this time keys in.Also can similarly obtain for functionality buttons " cancellation ", " affirmation ", its " cancellation ", " affirmation " printed words can directly be printed on the barrier bed.After the operator imported careful sign indicating number, single-chip microcomputer cut out demonstration, and password is reached main frame by communication interface, finishes once-through operation, waited for that next operation begins.

Crystal oscillator CY two ends meet single-chip microcomputer XTAL1, XTAL2, arrive ground through capacitor C 1, C2 simultaneously, constitute the single-chip microcomputer oscillating circuit; Diode D1, resistance R 6 parallel connections are connected with capacitor C 7 and are constituted reset circuit of SCM.

Because of barrier bed is provided with transparency window (4) in each digital display module top position, and the last plane of charactron (7) and barrier bed (2) leave 2～50 millimeters spacings, transparency window has just limited the visual range of charactron like this: the eyes that only are in the user of normal operating position, see through the number that transparency window (4) can see clear, intactly that the below charactron shows, and the onlooker who departs from normal operating position, all strokes can not be intactly seen by transparent part, thereby displaying contents can't be determined; Its transparency window (4) size is greater than the charactron character display (6) of its below.Different and the slightly different differences that cause of operating position at every turn with the person's s own situation that adapts to the different operating.Two opaque squares in the middle of each transparency window also can be cancelled are simple parallelogram, make panel more succinct.

Claims

1, a kind of code keypad uses out of order display keyboard assembly, it is characterized in that: it is by digital display circuit board, and the barrier bed of visible angle restriction and touch screen layer are formed; Barrier bed is placed on 2～50 millimeters places of digital display circuit board top, and its each digital display module top position corresponding to circuit board is provided with transparency window, and remainder is opaque, and its transparency window size is greater than the character display of the digital display module of its below; Touch screen layer be placed on barrier bed above.

2, code keypad as claimed in claim 1 is characterized in that: its digital display circuit board, and by single-chip microcomputer, communication interface circuit, sound circuit, touch screen interface circuit, the digital demonstration and drive circuit, electrify restoration circuit is formed; Establish ten digital display modules on the digital display circuit board, divide two groups to form the 2*5 matrix, the P2.0～P2.4 of single-chip microcomputer drives the column signal of digital display module respectively through current-limiting resistance to five a PNP transistor base by triode; P0.0～the P0.6 of single-chip microcomputer and P1.0～P1.6 by behind the drive integrated circult DM74LS04N, drive the capable signal of digital display module respectively again through current-limiting resistance, single-chip microcomputer is by the demonstration of ten charactrons of scan mode control; Single-chip microcomputer P0.7 or positive pulse signal of P1.7 output are to trigger end TR2, the TR1 of integrated circuit KD01, trigger speech IC, the voice signal of speech IC output arrives transistor base by output OUT through current-limiting resistance, drives loudspeaker and sends suggestion voice; Single-chip microcomputer is gathered touch signal by four-wire ohm touch-screen translation interface chip ADS7843, single-chip microcomputer connects ADS7843 input end of clock (CLK) by P3.5, signal (CS) is selected in P3.4 contact pin, P3.3 connects signal input part (DIN), P3.2 connects signal output part (DOUT), and four incoming lines of touch-screen are received ADS7843 touch screen interface X+, X-, Y+, Y-by connector J2; Single-chip microcomputer is by control ADS7843 sampling, and when having button to press, obtain the button coordinate, because of a certain coordinate range on all corresponding touch-screen of each digital display module, single-chip microcomputer is judged the digital display module of the position correspondence that the user presses according to the coordinate that reads in, thereby draws password key assignments that the user this time keys in; Single-chip microcomputer can mail to main frame by communication interface with password: the communication interface circuit is a level shifting circuit, constitute by MAX232 and peripheral electric capacity thereof, the T1IN of the P3.1 termination MAX232 of single-chip microcomputer, by MAX232 the Transistor-Transistor Logic level conversion of signals is become the RS232 level signal, hold connector J1 tripod by TIOUT, mail to main frame through external cable again, the R1IN of signal that the while main frame is sent from connector J1 the 4th pin to MAX232, its RS232 level converts the Transistor-Transistor Logic level signal to by MAX232, is outputed to the P3.0/ of single-chip microcomputer by R10UT.

3, code keypad as claimed in claim 1 is characterized in that: the barrier bed of visible angle restriction, and its each digital display module top position at circuit board is provided with transparency window, and remainder is opaque; Its transparency window size is greater than the character display of the digital display module of its below.

4, code keypad as claimed in claim 2 is characterized in that: described code keypad, the display module on its digital display circuit board can adopt LED charactron or liquid crystal display device.

5, code keypad as claimed in claim 1 is characterized in that: described code keypad, the password key on the barrier bed of its visible angle restriction " cancellation ", " affirmation " functionality buttons can directly be printed on the aspect of blocking.

6, code keypad as claimed in claim 1 is characterized in that: described code keypad, its touch-screen also can be established mechanical key with the next door of each digital display module and replace.