CN201063155Y

CN201063155Y - Cipher input device against peep

Info

Publication number: CN201063155Y
Application number: CNU2007200276055U
Authority: CN
Inventors: 王乐军
Original assignee: Individual
Current assignee: Ji'nan Silver Melting Mdt Infotech Ltd
Priority date: 2007-09-07
Filing date: 2007-09-07
Publication date: 2008-05-21
Anticipated expiration: 2017-09-07

Abstract

The utility model discloses an anti-peeping password input device, which solves the problem that the existing password input devices are unable to completely prevent from being peeped by illegal persons. The utility model has the advantages of simple structure, being easy to use, low cost and being capable of effectively preventing users password being peeped by illegal persons; the utility model comprise an external shell, a liquid crystal or OLED display arranged inside the external shell, a drive device, a control device, a touch screen covered on the liquid crystal or OLED display and a optical anti-peep piece positioned between the touch screen and the liquid crystal or OLED display.

Description

The cipher input of peep-proof visual function

Technical field

The utility model relates to the cipher input that use in fields such as a kind of finance, security protection, relate in particular to and a kind ofly be used to prevent the not operation personnel when legal operating personnel input password, means such as peep by malice and obtain the cipher input that user cipher causes the peep-proof visual function of the phenomenon of divulging a secret.

Background technology

Finance, security protection department are by checking the legal identity that user cipher comes verified users.After the user was input to computer system with password, the encrypted message that computer system and user reserve was in advance compared, thereby finished the verification of client identity.If unauthorized person steals the password of validated user, just may pretend to be validated user, carry out illegal activity, and then invade competent person's interests.

Unauthorized person is stolen the common method of others' password to be had: 1, when the competent person inputs password, closely peep; 2 or peep the action that the competent person inputs password more at a distance, the key position of the position combining cipher input media of hand is arranged and is known user cipher by inference during by the operator password keyboard; 3 or means such as video camera are installed in the shelter peep indirectly.

Existing cipher input adopts the laser-induced thermal etching method with character seal or be engraved on the plastics keycap more.The key of each character (being the character on the key) and key position (position of button) are all fixed.Therefore can't prevent that password from being peeped by unauthorized person.

For addressing this problem, the anti-means of peeping of passive-types such as protective cover, one-meter line have appearred.But effect is unsatisfactory all the time and the user operates inconvenience.

At present out of order input media is arranged also, utilize display device to show key, and the ordering of key changes at random, part reaches the anti-purpose of peeping.If but with nixie tube as display device, then exist number of elements many, poor reliability, power consumption is big, does not also have angle limitations because charactron shows, must be placed on charactron the depths of shell, the complexity that structure is become, volume is too fat to move huge.The use liquid crystal display device that has has utilized the less characteristic in the intrinsic visual angle of liquid crystal.But as make the difficulty and the bad control of technology of the technical change of further the reducing of liquid crystal visual angle (as be reduced to ± 10 ° in).And the characteristic of liquid crystal determined can only be unidirectional (about or front and back) restriction visual angle.Peep-proof problem when therefore above technology all can not solve the password input fully.

Summary of the invention

The utility model is exactly can't to prevent from fully problem such as to peep for unauthorized person in order to solve present user cipher input media, provide a kind of have simple in structure, easy to use, cost is low, can prevent effectively that user cipher from being peeped etc. the cipher input of the peep-proof visual function of advantage by unauthorized person.

For achieving the above object, the utility model has adopted following technical scheme:

A kind of cipher input of peep-proof visual function, it comprises shell, and liquid crystal or OLED display are installed in the shell, covers touch-screen on liquid crystal or OLED display, its underpart is backlight and Drive and Control Circuit plate, is provided with optics peep-proof sheet between described touch-screen and liquid crystal or OLED display.

Described peep-proof sheet is provided with regularly arranged groove or depression.The peep-proof sheet is a kind of light controlling device, and it comprises a two membrane structure, and a collection of extinction zone is all arranged on the every film.Extinction zone separately forms a collection of extinction element that extends along thickness direction, and the extinction element allows the observer to observe image by the peep-proof sheet in certain angular field of view, prevents from simultaneously to see image outside described visual angle.

The utility model adopts the LCD dynamically sorted anti-code keypad of peeping, and it partly is made of shell, touch-screen and liquid crystal or OLED display and driving, control circuit and optics peep-proof sheet etc.Touch-screen and liquid crystal or OLED display and driving, control circuit and optics peep-proof sheet are installed in the shell, constitute an integral body.Touch-screen is that transparent material is made, and is installed in the top, responds to user's operational motion and convert electric signal to send treatment circuit to.Optics peep-proof sheet is a kind of light controlling device that sharp private visual cut-off angle can be provided and can reduce phantom formation, allow the observer in certain visual range, to observe image by light controlling device, prevent from simultaneously outside described visual angle, to see image, optics peep-proof sheet is installed between touch-screen and the LCD, its visual angle is provided constraints, the angle of visibility of LCD further can be reduced, thereby effectively stopped peeping of unauthorized person, generation has prevented to divulge a secret.Liquid crystal or OLED display and driving, control circuit are installed in the below of optics peep-proof sheet.

The utility model is realized the arrangement of dynamic random key position by out of order liquid crystal or the OLED display of drives, cooperates optics peep-proof film simultaneously, makes comprehensive the reducing of display view angle of liquid crystal or OLED display.When the user operated, unauthorized person can't be by closely directly peeping, or at the password of knowing the user at a distance according to user's operational motion by inference, the anti-code keypad of peeping that prevent from the to divulge a secret liquid crystal that takes place or OLED show dynamic order.

The processing of drive, control circuit being finished touch screen signal converts user's operation to electric signal and inputs to single-chip microcomputer, and single-chip microcomputer sends host computer to after according to specific coding rule coding; Driving, control circuit use random algorithm, and the ordering of liquid crystal or OLED display display key symbol is changed at random; The corresponding operating position that drive, control circuit also will accord with key current location and touch-screen is mapped; Driving, control circuit also have functions such as buzzing prompt tone, text-to-speech prompting.

Using liquid crystal display device is to have utilized the little inherent characteristics in its visual angle.After the observer departs from observation axis certain angle, can't see content displayed on the liquid crystal clearly.This is one of shortcoming of liquid crystal display device originally, but when using on this code keypad, and the unauthorized person that can make the operator next door is because of exceeding effective visual angle of observation, and can't reach the purpose of peeping.The peep-proof sheet can make the visual angle of LCD further reduce, and reaching all around, two-dimensional directional limits the effect at visual angle comprehensively, the user can closely vertically debate knowledge display content displayed, and the person of peeping on next door can't see the key symbol because depart from effective observation visual angle.

When the user accesses to your password keyboard, input predefined password successively according to the actual key of liquid crystal display, PIN PAD sends and the corresponding key assignments of key to host computer.The key ordering randomly changing that shows on the while PIN PAD.When next user imported, the arrangement position of key was with preceding once fully different.Therefore avoided unauthorized person to know the possibility of divulging a secret of password by inference according to user's operational motion.

The beneficial effects of the utility model are, little liquid crystal display of visible angle and optics peep-proof sheet have been adopted, can further reduce the visible angle of LCD, effectively prevent other people illegally peeping, adopted the digital display mode of random variation, got rid of the possibility of knowing password according to user action by inference, can be widely used in finance, the security protection mechanism.

Description of drawings

Fig. 1 is the utility model structural representation.

Wherein, 1-shell, 2-LCD, 3-peep-proof sheet, 4-touch-screen, 5-backlight, 6-circuit board.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

Among Fig. 1, the utility model has shell 1, and liquid crystal or OLED display 2 are installed in the shell 1, covers touch-screen 4 on liquid crystal or OLED display 2, its underpart is backlight 5 and Drive and Control Circuit plate 6, and 2 of touch-screen 4 and liquid crystal or OLED displays are provided with optics peep-proof sheet 3.The peep-proof sheet is a kind of light controlling device, and it comprises a two membrane structure, and a collection of extinction zone is all arranged on the every film.Extinction zone separately forms a collection of extinction element that extends along thickness direction, and the extinction element allows the observer to observe image by the peep-proof sheet in certain angular field of view, prevents from simultaneously to see image outside described visual angle.

Show on the LCDs of PIN PAD 0-9 altogether 10 numeric keys symbol, corrigendum, acknowledgement key symbol and attached prompting term as " please input password ", " please inputing password again " etc.Wherein the ordering of 0-9 10 numeric keys symbol is a random variation, and the position of other key symbols is fixed.

Use of the present utility model is: the user vertically closely watches the liquid crystal device, can see the 0-9 10 numeric keys symbol of random arrangement clearly, the current location of the key symbol of liquid crystal display during according to operation, the flicking touch-screen, control circuit can with touch screen induction to operating position and current key symbol be mapped, and send host computer to behind the coding.After each user finished single job, the arrangement position of key symbol changed at once.When next user operates, get final product according to the same operation of diverse ordering.Certainly, can make display screen out of order as required at any time, out of order result be people's may command yet.

When cipher input powers up for the first time, send interrupted buzz three,, illustrate that the cipher input self check is correct.Arrange one group of key position of display device demonstration at random simultaneously.When host computer when cipher input sends out the signal that requires input operation, cipher input sends the voice suggestion of " please input password ", the user can input predefined password according to the array of display reality.Password input finishing back is by " affirmation " key, and cipher input transmits data to host computer and handles for host computer.The array order randomly changing of Xian Shiing simultaneously.

Claims

1. the cipher input of a peep-proof visual function, it comprises shell (1), liquid crystal or OLED display (2) are installed in the shell (1), go up covering touch-screen (4) at liquid crystal or OLED display (2), its underpart is backlight (5) and Drive and Control Circuit plate (6), it is characterized in that: be provided with optics peep-proof sheet (3) between described touch-screen (4) and liquid crystal or OLED display (2).

2. the cipher input of peep-proof visual function according to claim 1 is characterized in that: described peep-proof sheet (3) is provided with regularly arranged groove or depression.