CN100433123C

CN100433123C - Secrecy display method and apparatus for screen

Info

Publication number: CN100433123C
Application number: CNB200410011423XA
Authority: CN
Inventors: 张锐; 陈惠�; 张冰晶
Original assignee: Individual
Current assignee: CHANGCHUN ZEUS INFORMATIONSAFE INDUSTRY SHARE Co Ltd
Priority date: 2004-12-31
Filing date: 2004-12-31
Publication date: 2008-11-12
Anticipated expiration: 2024-12-31
Also published as: CN1801312A

Abstract

The present invention provides a screen secrecy display method and the device thereof. The present invention enables video signals which are transmitted to a screen to be amplified for transformation in the same phase and in the opposite phase, the field is used as the unit, and a programmable logic gate array is used for controlling a four-knife double-throw electronic switch in an alternative or 50 percent random mode, so that the signals in the same phase and in the opposite phase are transmitted to the screen in different time periods; a pair of glasses made of liquid crystal light valves is connected with the electronic switch, only when the signals in the same phase are transmitted to the screen, the light valve can be open; when the signals in the opposite phase are transmitted to the screen for display, the light valve is close; the pair of special-purpose glasses can see the signals in the same phase to read the contents of the screen so as to perform the function of secrecy screen display. The present invention enables the video signals of the screen to be amplified for transformation in the same phase and in the opposite phase by utilizing the optical detention phenomenon, so that the video signals of the screen can be superimposed spatiotemporally, and the contents of the screen can only be read through the pair of special-purpose glasses so as to realize safety and security for computer operation on site.

Description

The secret display packing and the device of screen

Technical field

The present invention relates to a kind of display packing of screen, the secret display packing of new screen especially is provided, the device that utilizes this method to make is provided simultaneously, belong to screen display packing technical field.

Background technology

Act display mode of looking in the past refreshes by the field, that is: be unit with the screen, and continuously image being presented on the display screen of a screen (field) screen (field) read for the people.The computer display of making according to this principle, people are when operation, what screen was preceding can see content displayed on the screen per capita, this kind situation does not wish to take place sometimes, that is to say when oneself handles the content of need to be keep secret on computers, can not allow other people on screen, see handled content, reach secret purpose.

Summary of the invention

The invention provides a kind of secret display packing of screen, uncorrelated personnel can't be observed on the screen just in content displayed.

The device that utilizes this method to make is provided simultaneously, has been used for secure computer, realized the function of keeping secret of open place operational computations machine.

Secret display packing of the present invention is as follows: the vision signal that will be sent to display screen is carried out homophase and anti-phase amplification conversion, with programmable gate array is unit with the field, alternately or with 50% random fashion to control four blade double-throw electronic switch, screen is delivered in the signal timesharing of anti-phase signal and homophase got on.Utilize the trapping phenomena of vision, anti-phase signal and the stack of the signal of homophase on space-time, what see on screen is the grey of whole screen, does not see original content.Operating personnel put on the glasses of being made by liquid crystal light valve, and the switching of light valve is controlled by electronic switch by programmable gate array, have only the signal when homophase to be sent to when showing on the screen, and light valve is just open-minded; Anti-phase signal is sent on the screen when showing light valve and closes, and when special glasses, operating personnel can only see the signal of homophase.Like this, have only the operator just can read the content of screen, played the screen display effect of maintaining secrecy.

Here the so-called mode that replaces is meant: open and close, open and close, open and close ... the appearance that the .. open and close replace; 50% random fashion is meant: open and close, close, open and close, open, open and close, close, open and close, open ... .., open and close occur at random, but respectively account for half.A kind of secret effect in back can be better.

For the interleaved TV of 50Hz field refreshing frequency, this kind method can feel that picture has slight flicker.For the TV and the display of lining by line scan greater than 50Hz field refreshing frequency, flicker does not appear, have good demonstration.

The concrete structure of the secret display device of screen manufactured according to the present invention is as follows:

By programmable gate array, signal converter, electronic switch and liquid crystal light valve glasses constitute, wherein, electronic switch is a four blade double-throw structure, which is provided with 4 groups of switch contacts and 4 groups of signal output parts, the control end of the output termination electronic switch of programmable gate array, with the field is unit, alternately or with 50% random fashion to control the switching of four blade double-throw electronic switch, signal converter is red, green, blue three groups of homophases, inverting amplifier is formed, every group of homophase, connect corresponding video signals respectively after the parallel connection of phase inverter input end, output terminal connects the switch contact of electronic switch respectively, the signal input part of liquid crystal light valve glasses connects one group of output terminal of electronic switch, the switching of light valve is controlled by electronic switch by programmable gate array, has only the signal when homophase to be sent to when showing on the screen, and light valve is just open-minded; Anti-phase signal is sent on the screen when showing light valve and closes, and the operating personnel of band liquid crystal light valve glasses can only see the signal of homophase.

Good effect of the present invention is: the trapping phenomena that utilizes vision, the vision signal of display screen is carried out homophase and anti-phase amplification conversion simultaneously, make its stack on space-time, by programmable gate array control four blade double-throw electronic switch, just can read the content of screen by special glasses, realize secretization of execute-in-place computing machine.

Description of drawings

Fig. 1 is a structure principle chart of the present invention.

Embodiment

Embodiment 1

According to shown in Figure 1, by programmable gate array (CPLD), signal converter, electronic switch and liquid crystal light valve glasses constitute, wherein, electronic switch is a four blade double-throw structure, which is provided with 4 groups of switch contacts and 4 groups of signal output parts, the control end of the output termination electronic switch of programmable gate array, with the field is unit, alternately or with 50% random fashion to control the switching of four blade double-throw electronic switch, signal converter is red, green, blue three groups of homophases, inverting amplifier is formed, every group of homophase, connect corresponding video signals respectively after the parallel connection of phase inverter input end, output terminal connects the switch contact of electronic switch respectively, the signal input part of liquid crystal light valve glasses connects one group of output terminal of electronic switch, the switching of light valve is controlled by electronic switch by programmable gate array, have only the signal when homophase to be sent to when showing on the screen, light valve is just open-minded; Anti-phase signal is sent on the screen when showing light valve and closes, and the operating personnel of band liquid crystal light valve glasses can only see the signal of homophase.

Claims

1, a kind of secret display packing of screen, it is characterized in that: the vision signal that will be sent to display screen is carried out homophase and anti-phase amplification conversion, with programmable gate array is unit with the field, alternately or with 50% random fashion to control four blade double-throw electronic switch, screen is delivered in the signal timesharing of anti-phase signal and homophase got on; The glasses of being made by liquid crystal light valve are connected with electronic switch, and the switching of liquid crystal light valve is controlled by electronic switch by programmable gate array, have only the signal when homophase to be sent to when showing on the screen, and liquid crystal light valve is just open-minded; Anti-phase signal is sent on the screen when showing liquid crystal light valve and closes, and the glasses that liquid crystal light valve is made can be seen the signal of homophase, read the content of screen, have played the screen display effect of maintaining secrecy.

2, the secret display device of making according to the described method of claim 1 of screen, it is characterized in that: by programmable gate array, signal converter, electronic switch and liquid crystal light valve glasses constitute, wherein, electronic switch is a four blade double-throw structure, the control end of the output termination electronic switch of programmable gate array, with the field is unit, alternately or with 50% random fashion to control the switching of four blade double-throw electronic switch, signal converter is red, green, blue three groups are formed, every group comprises in-phase amplifier and inverting amplifier, connect corresponding video signals respectively after the input end parallel connection of in-phase amplifier in every group and inverting amplifier, the in-phase amplifier in every group and the output terminal of inverting amplifier connect the switch contact of electronic switch respectively, the signal input part of liquid crystal light valve glasses connects one group of output terminal of electronic switch, the switching of liquid crystal light valve is controlled by electronic switch by programmable gate array, have only the signal when homophase to be sent to when showing on the screen, liquid crystal light valve is just open-minded; Anti-phase signal is sent on the screen when showing liquid crystal light valve and closes, and can only see the signal of homophase by the liquid crystal light valve glasses.