CN106448521A - Anti-peeping display method and system thereof - Google Patents
Anti-peeping display method and system thereof Download PDFInfo
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- CN106448521A CN106448521A CN201610825902.8A CN201610825902A CN106448521A CN 106448521 A CN106448521 A CN 106448521A CN 201610825902 A CN201610825902 A CN 201610825902A CN 106448521 A CN106448521 A CN 106448521A
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- video data
- peeping
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
An anti-peeping display system comprises a microcomputer interface, a display interface, a host processing chip, a video memory and a pair of liquid crystal glasses. The host processing chip is a programmable chip including an acquisition module, an operation module and a sending module. The microcomputer interface and the acquisition module are connected with the video memory. Display data are stored in the video memory via the microcomputer interface. The acquisition module obtains the display data and odd-even frame flag bits of the display data from the video memory. The operation module is connected with the acquisition module and used for carrying out XOR operation of the display data and the odd-even frame flag bits and carrying out anti-peeping correction of the display data. The sending module and the operation module are connected to the display interface. The sending module is used for sending operation results of the operation module to the display interface. Lenses of the pair of liquid crystal glasses are made of a liquid crystal material, and the odd-even frame flag bits control the opening and closing the pair of liquid crystal glasses at the same time.
Description
Technical field
The present invention relates to a kind of anti-peeping display packing and its system.
Background technology
Patent of invention《A kind of Anti-peep display system》(CN 102708833B) gives a kind of the anti-peeping of microsystem
Display system, video card including microcomputer, TMDS data receiver and decoding circuit, T ' trigger, liquid crystal glasses, data signal and control
The drive circuit of signal processed, TMDS data encoding and transtation mission circuit, display；The video card of microcomputer and TMDS data receiver and decoding
Circuit connects；TMDS data receiver and decoding circuit are connected with the drive circuit of data signal and control signal；T ' trigger is defeated
Enter end to be connected with TMDS data receiver and decoding circuit, outfan is connected with the drive circuit of data signal and control signal；Liquid
Brilliant glasses are synchronously controlled by the outfan of T ' trigger；TMDS data encoding and transtation mission circuit and data signal and control signal
Drive circuit connects；Display is connected with TMDS data encoding and transtation mission circuit.If realizing anti-peeping function, it is necessary to aobvious in microcomputer
Connect a set of such system between card and display, such set of system need independently-powered, to user bring installation and
Mobile inconvenience.
Content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of anti-peeping display packing and its system, and user can be
Anti-peeping display function is realized on desktop computer or notebook computer.
To achieve these goals, the present invention adopts following scheme：
A kind of anti-peeping display packing, comprises the following steps：
1) the parity frame flag bit of video data and video data is obtained；
2) to step 1) in video data and parity frame flag bit make XOR, for making anti-peeping repairing to video data
Just；
3) by step 2) in operation result be sent to display interface device.
When parity frame flag bit is 0, video data is odd-numbered frame, and when parity frame flag bit is 1, video data is even number
Frame；
The concrete operations of the XOR are：
Wherein, DiFor video data, M is parity frame flag bit, YDiFor anti-peeping revised video data, i=0,
1,…23.
The DiMiddle D23、D22、D21、D20、D19、D18、D17、D16Represent red data, D15、D14、D13、D12、D11、D10、D9、
D8Represent green data, D7、D6、D5、D4、D3、D2、D1、D0Represent blue data.
A kind of anti-peeping display unit, including：
Acquisition module, for obtaining the parity frame flag bit of video data and video data；
Computing module, for video data and parity frame flag bit are made XOR, makees anti-peeping repairing to video data
Just；
Sending module, for being sent to display interface device by the operation result in computing module.
A kind of anti-peeping display card, including microcomputer interface, display interface device, main process task chip and video memory；Main process task chip
For programmable chip, including acquisition module, computing module and sending module；Microcomputer interface and acquisition module respectively with video memory phase
Even, video data is stored in video memory through microcomputer interface, and acquisition module obtains the odd even of video data and video data from video memory
Flag of frame position；Computing module is connected with acquisition module, for video data and parity frame flag bit are made XOR, to showing
Data make anti-peeping correction；Computing module is connected with sending module respectively with display interface device, and sending module is used for computing mould
Operation result in block is sent to display interface device.
A kind of Anti-peep display system, including microcomputer interface, display interface device, main process task chip, video memory and liquid crystal glasses,
Main process task chip is programmable chip, including acquisition module, computing module and sending module；Microcomputer interface and acquisition module are respectively
It is connected with video memory, video data is stored in video memory through microcomputer interface, acquisition module obtains video data from video memory and shows number
According to parity frame flag bit；Computing module is connected with acquisition module, for video data and parity frame flag bit are made XOR fortune
Calculate, make anti-peeping correction to video data；Computing module is connected with sending module respectively with display interface device, and sending module is used for
Operation result in computing module is sent to display interface device；The eyeglass of the liquid crystal glasses adopts liquid crystal material, parity frame
Flag bit is while control unlatching and the closure of liquid crystal glasses.
When parity frame flag bit is 0, video data is odd-numbered frame, while liquid crystal glasses are opened；Parity frame flag bit is 1
When, video data is even frame, while liquid crystal glasses closure.
The sending module is also to display interface device output field line synchronising signal.
The parity frame flag bit is exported by display interface device or is individually exported.
Beneficial effects of the present invention：
(1) the anti-peeping display packing is adopted, and user is while normal operating, and other people cannot see using naked eyes
Screen display content；
(2) video card directly can be replaced by desktop computer the anti-peeping display card of the present invention, realize anti-peeping display work(
Energy；
(3) laptop computer manufacturer can realize anti-theft in production link using the anti-peeping television unit of the present invention
Peep display function；
(4) anti-peeping display card or Anti-peep display system are simply light and handy, are easy to carry；
(5) anti-peeping display card or Anti-peep display system need not be independently-powered, easy to use.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The present invention relates to a kind of anti-peeping display packing, comprises the following steps：
1) the parity frame flag bit of video data and video data is obtained；
2) to step 1) in video data and parity frame flag bit make XOR, for making anti-peeping repairing to video data
Just；
3) by step 2) in operation result be sent to display interface device.
According to this anti-peeping display packing, a kind of anti-peeping display unit can be designed, including：
Acquisition module, for obtaining the parity frame flag bit of video data and video data；
Computing module, for video data and parity frame flag bit are made XOR, makees anti-peeping repairing to video data
Just；
Sending module, for being sent to display interface device by the operation result in computing module.
As shown in figure 1, constantly video data is processed through main process task chip by microcomputer interface (such as AGP, PCI-E etc.)
Send into video memory, that is, update video memory content (main process task chip is fpga chip, model EP3C25E144C8N)；Then by aobvious
Show that video memory data are constantly sent video card to display by device interface (such as DVI, HDMI etc.)；Then video memory data are sending display
Certain correction is carried out during device interface, i.e.,：If the data of the arbitrfary point pixel for recording in video memory are D23、D22、D21、D20、D19、
D18、D17、D16, D15、D14、D13、D12、D11、D10、D9、D8, D7、D6、D5、D4、D3、D2、D1、D0(be abbreviated as Di, i=0,1 ...,
23), wherein D23、D22、D21、D20、D19、D18、D17、D16Represent red data, D15、D14、D13、D12、D11、D10、D9、D8Represent green
Chromatic number evidence, D7、D6、D5、D4、D3、D2、D1、D0Represent blue data.If YDiIt is the corresponding D for being sent by display interface devicei's
Data, i=0,1 ..., 23.If M is the parity frame flag bit for sending display data, during odd-numbered frame, M=0, during even frame, M=
1.So,
Wherein, i=0,1 ..., 23.
M controls liquid crystal glasses simultaneously, M=0, and liquid crystal glasses printing opacity is opened, M=1, the light tight closure of liquid crystal glasses, M end
Output can utilize the analog output of DVI or HDMI, it is also possible to individually export.
Odd-numbered frame video data makees XOR with odd-numbered frame M=0, obtains former odd-numbered frame video data；While M=0, liquid
Brilliant glasses are opened；
Even frame video data makees XOR with even frame M=1, and obtain former even frame video data negates data；
While M=1, liquid crystal glasses closure；
Continuously quickly scan through odd even frame data after showing, its effect is the average of odd even frame data, at this moment directly uses meat
Eye goes to watch display, can only see brightness for 50% white screen.
After wearing liquid crystal glasses, during due to transmitting odd number frame data, liquid crystal glasses are opened, it can be seen that display picture, transmission
Liquid crystal glasses closure during even number frame data, it is impossible to see display picture；Continuously quickly scan through odd even frame data after showing, due to
The picture shown by the data of odd-numbered frame is can only see, so picture brightness is the 50% of raw frames brightness.
Field line synchronising signal, data signal etc. are processed through main process task chip, are encoded to the signal for meeting DVI or HDMI standard
Output.
Present invention can apply to a kind of anti-peeping show card, including microcomputer interface, display interface device, main process task chip and
Video memory；Main process task chip is programmable chip, including acquisition module, computing module and sending module；Microcomputer interface and acquisition mould
Block is connected with video memory respectively, and video data is stored in video memory through microcomputer interface, acquisition module from video memory obtain video data and
The parity frame flag bit of video data；Computing module is connected with acquisition module, for making video data and parity frame flag bit
XOR, makees anti-peeping correction to video data；Computing module is connected with sending module respectively with display interface device, sends mould
Block is used for for the operation result in computing module being sent to display interface device.
Present invention can apply to a kind of Anti-peep display system, including microcomputer interface, display interface device, main process task core
Piece, video memory and liquid crystal glasses, main process task chip is programmable chip, including acquisition module, computing module and sending module；Microcomputer
Interface is connected with video memory respectively with acquisition module, and video data is stored in video memory through microcomputer interface, and acquisition module is obtained from video memory
Take the parity frame flag bit of video data and video data；Computing module is connected with acquisition module, for by video data and strange
XOR is made in even flag of frame position, makees anti-peeping correction to video data；Computing module and display interface device respectively with send mould
Block is connected, and sending module is used for for the operation result in computing module being sent to display interface device；The eyeglass of the liquid crystal glasses
Using liquid crystal material, parity frame flag bit is while control unlatching and the closure of liquid crystal glasses.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention
The restriction that encloses, one of ordinary skill in the art are should be understood that on the basis of technical scheme, and those skilled in the art are not
The various modifications that makes by needing to pay creative work or deformation are still within protection scope of the present invention.
Claims (10)
1. a kind of anti-peeping display packing, it is characterised in that comprise the following steps：
1) the parity frame flag bit of video data and video data is obtained；
2) to step 1) in video data and parity frame flag bit make XOR, for making anti-peeping correction to video data；
3) by step 2) in operation result be sent to display interface device.
2. a kind of anti-peeping display packing according to claim 1, it is characterised in that when parity frame flag bit is 0, shows
Data are odd-numbered frame, and when parity frame flag bit is 1, video data is even frame.
3. a kind of anti-peeping display packing according to claim 1, it is characterised in that the concrete operations of the XOR
For：
Wherein, DiFor video data, M is parity frame flag bit, YDiFor anti-peeping revised video data, i=0,1 ... 23.
4. a kind of anti-peeping display packing according to claim 3, it is characterised in that the DiMiddle D23、D22、D21、D20、
D19、D18、D17、D16Represent red data, D15、D14、D13、D12、D11、D10、D9、D8Represent green data, D7、D6、D5、D4、D3、
D2、D1、D0Represent blue data.
5. a kind of anti-peeping display unit based on described in claim 1, it is characterised in that include：
Acquisition module, for obtaining the parity frame flag bit of video data and video data；
Computing module, for video data and parity frame flag bit are made XOR, makees anti-peeping correction to video data；
Sending module, for being sent to display interface device by the operation result in computing module.
6. a kind of anti-peeping display card based on described in claim 5, it is characterised in that：Including microcomputer interface, display interface device,
Main process task chip and video memory；Main process task chip is programmable chip, including acquisition module, computing module and sending module；Microcomputer
Interface is connected with video memory respectively with acquisition module, and video data is stored in video memory through microcomputer interface, and acquisition module is obtained from video memory
Take the parity frame flag bit of video data and video data；Computing module is connected with acquisition module, for by video data and strange
XOR is made in even flag of frame position, makees anti-peeping correction to video data；Computing module and display interface device respectively with send mould
Block is connected, and sending module is used for for the operation result in computing module being sent to display interface device.
7. a kind of Anti-peep display system based on described in claim 6, it is characterised in that：Also include liquid crystal glasses, the liquid
The eyeglass of brilliant glasses adopts liquid crystal material, and parity frame flag bit is while control unlatching and the closure of liquid crystal glasses.
8. a kind of Anti-peep display system according to claim 7, it is characterised in that：When parity frame flag bit is 0, show
Data are odd-numbered frame, while liquid crystal glasses are opened；When parity frame flag bit is 1, video data is even frame, while liquid crystal glasses
Closure.
9. a kind of Anti-peep display system according to claim 7 or 8, it is characterised in that：The sending module is also to aobvious
Show device interface output field line synchronising signal.
10. a kind of Anti-peep display system according to claim 7 or 8, it is characterised in that：The parity frame flag bit leads to
Cross display interface device output or individually export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825902.8A CN106448521A (en) | 2016-09-14 | 2016-09-14 | Anti-peeping display method and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825902.8A CN106448521A (en) | 2016-09-14 | 2016-09-14 | Anti-peeping display method and system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106448521A true CN106448521A (en) | 2017-02-22 |
Family
ID=58168473
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610825902.8A Pending CN106448521A (en) | 2016-09-14 | 2016-09-14 | Anti-peeping display method and system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267909A (en) * | 2021-07-19 | 2021-08-17 | 军事科学院系统工程研究院网络信息研究所 | Peep-proof display method based on wave front distortion compensation |
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| WO2004073308A1 (en) * | 2003-02-14 | 2004-08-26 | Nexvi Corporation | Method of transmitting signal for indicating opening or shuttering of a shutter in a private image display device |
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| CN113267909A (en) * | 2021-07-19 | 2021-08-17 | 军事科学院系统工程研究院网络信息研究所 | Peep-proof display method based on wave front distortion compensation |
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Application publication date: 20170222 |
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