CN102708833B - Anti-peep display system - Google Patents
Anti-peep display system Download PDFInfo
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- CN102708833B CN102708833B CN 201210215639 CN201210215639A CN102708833B CN 102708833 B CN102708833 B CN 102708833B CN 201210215639 CN201210215639 CN 201210215639 CN 201210215639 A CN201210215639 A CN 201210215639A CN 102708833 B CN102708833 B CN 102708833B
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Abstract
The invention relates to an anti-peep display system for a microcomputer system. The anti-peep display system comprises a display card of a microcomputer, a TMDS (Transition Minimized Differential Signaling) data receiving and decoding circuit, a T' trigger, controllable liquid crystal eyeglasses, a driving circuit of a data signal and a control signal, a TMDS data encoding and transmitting circuit and a display, wherein the display card of the microcomputer is connected with the TMDS data receiving and decoding circuit; the TMDS data receiving and decoding circuit is connected with the driving circuit of the data signal and the control signal; the input end of the T' trigger is connected with the TMDS data receiving and decoding circuit; the output end of the T' trigger is connected withthe driving circuit of the data signal and the control signal; the controllable liquid crystal eyeglasses are controlled by the output end of the T' trigger synchronously; the TMDS data encoding and transmitting circuit is connected with the driving circuit of the data signal and the control signal; and the display is connected with the TMDS data encoding and transmitting circuit. According to the anti-peep display system, contents on the display can only be seen by people who operate the microcomputer and an application system thereof, and other people cannot see, so that the anti-peep problem of the microcomputer system is solved.
Description
Technical field
The present invention relates to a kind of anti-display system of peeping of microsystem.
Background technology
Having under many occasions, the user of microcomputer is unwilling to allow oneself people by the side of see the display interface of the microcomputer of oneself just operating, such as the microcomputer of the operation Web bank of the ATM of bank, lobby, perhaps computer of the enquiry machine of other business hall and public arena etc.
At present result of the above problems is " one-meter line " or block with shutter etc.Still there is not solution to the problems described above on technological layer.
The patent of the present invention i.e. anti-display system of peeping is not to address the above problem with the method that the space isolates, but address the above problem with the method for electronic technology.
Summary of the invention
The present invention seeks to solve the anti-problem of peeping of microsystem, a kind of anti-display system of peeping is provided, adopt the method for electronic technology, make the content of having only the people who operates microcomputer and application system thereof can see display, and others can't see.The present invention is achieved through the following technical solutions:
A kind ofly anti-peep display system, comprise that mainly video card, the TMDS data of microcomputer receive the decode the driving circuit of circuit, T ' trigger, controllable liquid crystal glasses, data-signal and control signal, TMDS data coding and transtation mission circuit, display; The video card of described microcomputer receives the decode circuit with the TMDS data and is connected; Described TMDS data receive the decode circuit and are connected with the driving circuit of data-signal and control signal; Described T ' trigger input end receives the decode circuit with the TMDS data and is connected, and T ' trigger output terminal is connected with the driving circuit of data-signal and control signal; Described controllable liquid crystal glasses are controlled by the output terminal of T ' trigger synchronously; Described TMDS data coding is connected with the driving circuit of transtation mission circuit with data-signal and control signal; Described display is connected with transtation mission circuit with TMDS data coding.
The video card of described microcomputer, signal be by video card DVI interface output, output signal have the TMDS clock+, the TMDS clock-, TMDS data 0+, TMDS data 0-, TMDS data 1+, TMDS data 1-, TMDS data 2+, TMDS data 2-.
Described TMDS data receive the decode circuit, with the TMDS data of video card DVI interface be transformed to row synchronous HSYNC, field synchronization VSYNC, detect SCDT synchronously, the output data allow DE, output data clock ODCK, odd pixel QO(0-23), even pixel QE(0-23).
Described T ' trigger, input end CLK connects the field synchronization VSYNC that the TMDS data receive the decode circuit, output terminal Q is as the sign of parity frame, Q be 1 o'clock be odd-numbered frame, Q be 0 o'clock be even frame, 0 and 1 of Q end will control the negate of even frame data and leading directly to of strange frame data, also control closing and opening of liquid crystal glasses, Q is that 1 o'clock liquid crystal glasses is opened, and Q is that 0 o'clock liquid crystal glasses is closed.
Described controllable liquid crystal glasses, the liquid crystal of two eyeglasses are synchronously controlled by the output terminal Q of T ' trigger; Described control signal Q controls liquid crystal glasses by line, perhaps by infrared ray control liquid crystal glasses.
Described TMDS data coding and transtation mission circuit convert the signal of the driving circuit of data-signal and control signal the output of to TMDS data.
Described display, its DVI interface receive the TMDS data of TMDS data coding and transtation mission circuit.
Describedly a kind ofly anti-peep display system, also comprise the 3.3V power supply.
Describedly a kind ofly anti-peep display system, K switch is set, T ' trigger has asynchronous set end
When K switch is closed,
Trigger set Q=1, the MUX in the driving circuit of data-signal and control signal is always straight-through, and display normally shows; When K disconnected, the anti-display system of peeping was opened.
The driving circuit of described data-signal and control signal, its function are odd-numbered frame data QO(0-23) straight-through, even frame data QE(0-23) reverse drive; Described QO, QE receive 24 road alternative selector switchs, form 24 bit data D(0-23) output; The output of described alternative selector switch is by the output Q control of T ' trigger, and during Q=1, output QO during Q=0, exports QE; Control signal is through the directly output of overdriving.
The data of odd-numbered frame are straight-through in the driving circuit of data-signal and control signal, the data negate of even frame, and other control signals are all constant, these data-signals and control signal delivered in the display show.After the parity frame data scanned demonstration continuously fast, its effect was the average of parity frame data, and at this moment display shows the white screen of about 50% brightness.RGB data such as a certain 24 color pixels are R
7R
6R
5R
4R
3R
2R
1R
0G
7G
6G
5G
4G
3G
2G
1G
0B
7B
6B
5B
4B
3B
2B
1B
0, behind the driving circuit through native system data-signal and control signal, the data of odd-numbered frame are constant, still are R
7R
6R
5R
4R
3R
2R
1R
0G
7G
6G
5G
4G
3G
2G
1G
0B
7B
6B
5B
4B
3B
2B
1B
0, become after the data back of even frame
The result of scanning of a display is about the average of parity frame data, namely
Be (11111111)/2(11111111)/2(11111111)/2, i.e. 011111110111111101111111(50%).Directly with the naked eye remove to watch display, can only see white screen (brightness is 50%).
The liquid crystal glasses of utilization of the present invention and odd-numbered frame synchro control is watched display picture, because liquid crystal glasses is opened when transmitting the odd-numbered frame data, liquid crystal glasses is closed when transmitting the even frame data, so can only watch the apparent picture of data of odd-numbered frame, i.e. raw frames.Loss during owing to the data of seeing a field less and liquid crystal glasses printing opacity is so picture brightness is slightly less than 50% of raw frames brightness.
The present invention watches display that flickering is arranged for avoiding by liquid crystal glasses, requires the field (frame) of display frequently to be greater than 100Hz, and the frequency of watching like this is greater than 50Hz.
By wearing the liquid crystal glasses of native system, the display screen content displayed can be watched, otherwise white screen can only be seen, can't see the content of display screen.According to actual needs, liquid crystal glasses can be fixed, and also can not fix.If actual conditions do not need anti-peeping, but Closing Switch K reverts to normal microcomputer display system.
The invention has the beneficial effects as follows:
The present invention adopts electronic technology to solve the anti-problem of peeping of microsystem, make the content of having only the people who operates microcomputer and application system thereof can see display, and others can't see.Native system is simple to operate, and is safe and reliable.
Description of drawings
Fig. 1 is overall system frame diagram of the present invention;
Fig. 2 is straight-through, the reverse drive circuit of data in the driving circuit of data-signal and control signal.
Among Fig. 1,1, the video card of microcomputer; 2, the TMDS data receive the decode circuit; 3, T ' trigger; 4, controllable liquid crystal glasses; The driving circuit of 5 data-signals and control signal; 6, TMDS data coding and transtation mission circuit; 7 displays; 8, power supply.
Among Fig. 2, i=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Among Fig. 1, a kind ofly anti-peep display system, comprise that mainly video card 1, the TMDS data of microcomputer receive the decode the driving circuit 5 of circuit 2, T ' trigger 3, controllable liquid crystal glasses 4, data-signal and control signal, TMDS data coding and transtation mission circuit 6, display 7; The video card 1 of described microcomputer receives the decode circuit 2 with the TMDS data and is connected; Described TMDS data receive the decode circuit 2 and are connected with the driving circuit 5 of data-signal and control signal; Described T ' trigger 3 input ends receive the decode circuit 2 with the TMDS data and are connected, and T ' trigger 3 output terminals are connected with the driving circuit 5 of data-signal and control signal; Described controllable liquid crystal glasses 4 are controlled by the output terminal of T ' trigger 3 synchronously; Described TMDS data coding is connected with the driving circuit 5 of transtation mission circuit 6 with data-signal and control signal; Described display 7 is connected with transtation mission circuit 6 with TMDS data coding.
The TMDS data receive the decode chips such as TFP101A that circuit 2 can produce with U.S. Texas Instruments company or TFP201, with the TMDS data of DVI interface be transformed to row synchronous HSYNC, field synchronization VSYNC, detect SCDT synchronously, the output data allow DE, output data clock ODCK, odd pixel QO(0-23), even pixel QE(0-23).During DE=1, TMDS data 0 passage solves blue data (0-7) by QO(0-7) and QE(0-7) output, TMDS data 1 passage solves green data (0-7) by QO(8-15) and QE(8-15) output, TMDS data 2 passages solve red data (0-7) by QO(16-23) and QE(16-23) output; During DE=0, TMDS data 0 passage solves HSYNC, VSYNC, and TMDS data 1 passage solves CTL1, and TMDS data 2 passages solve CTL2, CTL3.
T ' trigger 3 input end CLK connect the field synchronization VSYNC that the TMDS data receive the decode circuit, and output terminal Q is as the sign of parity frame, Q be 1 o'clock be odd-numbered frame, Q be 0 o'clock be even frame; 0 and 1 of described Q end will control the negate of even frame data and leading directly to of odd-numbered frame data in the driving circuit 5 of data-signal and control signal, also control closing and opening of liquid crystal glasses 4, liquid crystal glasses 4 is opened when transmitting the odd-numbered frame data, and liquid crystal glasses 4 is closed when transmitting the even frame data.
The liquid crystal of 4 two eyeglasses of controllable liquid crystal glasses is synchronously controlled by the output terminal Q of T ' trigger 3; Described control signal Q is by line control liquid crystal glasses 4, perhaps by infrared ray control liquid crystal glasses 4.
The driving circuit 5 of data-signal and control signal, its function are odd-numbered frame data QO(0-23) straight-through, even frame data QE(0-23) reverse drive; Described QO, QE receive 24 road alternative selector switchs, form 24 bit data D(0-23) output; The output of described alternative selector switch is by the output Q control of T ' trigger 3, and during Q=1, output QO during Q=0, exports QE; Control signal is through the directly output of overdriving.
The chips such as SiI164 that TMDS data codings and transtation mission circuit 6 can use U.S. Silicon Image company to produce convert the signal of the driving circuit 5 of data-signal and control signal to the TMDS data and export.
Display 7DVI interface receives the TMDS data of TMDS data coding and transtation mission circuit 6.
A kind ofly anti-peep display system, also comprise 3.3V power supply 8.
A kind ofly anti-peep display system, K switch is set, T ' trigger 3 has asynchronous set end
When K switch is closed,
Trigger set Q=1, the MUX in the driving circuit 5 of data-signal and control signal is always straight-through, and display normally shows.When K disconnected, the anti-display system of peeping was opened.
Among Fig. 2, the data of the driving circuit odd-numbered frame of data-signal and control signal are straight-through, the data negate of even frame, and other control signals are all constant, these data-signals and control signal delivered in the display show.After the parity frame data scanned demonstration continuously fast, its effect was the average of parity frame data, and at this moment display shows the white screen of about 50% brightness.RGB data such as a certain 24 color pixels are R
7R
6R
5R
4R
3R
2R
1R
0G
7G
6G
5G
4G
3G
2G
1G
0B
7B
6B
5B
4B
3B
2B
1B
0, behind the driving circuit through native system data-signal and control signal, the data of odd-numbered frame are constant, still are R
7R
6R
5R
4R
3R
2R
1R
0G
7G
6G
5G
4G
3G
2G
1G
0B
7B
6B
5B
4B
3B
2B
1B
0, become after the data back of even frame
The result of scanning of a display is about the average of parity frame data, namely
Be (11111111)/2(11111111)/2(11111111)/2, i.e. 011111110111111101111111(50%).Directly with the naked eye remove to watch display, can only see white screen (brightness is 50%).
The liquid crystal glasses of utilization of the present invention and odd-numbered frame synchro control is watched display picture, because liquid crystal glasses is opened when transmitting the odd-numbered frame data, liquid crystal glasses is closed when transmitting the even frame data, so can only watch the apparent picture of data of odd-numbered frame, i.e. raw frames.Loss during owing to the data of seeing a field less and liquid crystal glasses printing opacity is so picture brightness is slightly less than 50% of raw frames brightness.
The present invention watches display that flickering is arranged for avoiding by liquid crystal glasses, requires the field (frame) of display frequently to be greater than 100Hz, and the frequency of watching like this is greater than 50Hz.
By wearing the liquid crystal glasses of native system, the display screen content displayed can be watched, otherwise white screen can only be seen, can't see the content of display screen.According to actual needs, liquid crystal glasses can be fixed, and also can not fix.If actual conditions do not need anti-peeping, but Closing Switch K reverts to normal microcomputer display system.
Claims (10)
1. prevent peeping display system for one kind, it is characterized in that, comprise that video card, the TMDS data of microcomputer receive the decode the driving circuit of circuit, T ' trigger, controllable liquid crystal glasses, data-signal and control signal, TMDS data coding and transtation mission circuit, display; The video card of described microcomputer receives the decode circuit with the TMDS data and is connected; Described TMDS data receive the decode circuit and are connected with the driving circuit of data-signal and control signal; Described T ' trigger input end receives the decode circuit with the TMDS data and is connected, and T ' trigger output terminal is connected with the driving circuit of data-signal and control signal; Described controllable liquid crystal glasses are controlled by the output terminal of T ' trigger synchronously; Described TMDS data coding is connected with the driving circuit of transtation mission circuit with data-signal and control signal; Described display is connected with transtation mission circuit with TMDS data coding.
2. according to right 1 described a kind of anti-display system of peeping, it is characterized in that, the video card of described microcomputer, signal is by video card DVI interface output, output signal have the TMDS clock+, the TMDS clock-, TMDS data 0+, TMDS data 0-, TMDS data 1+, TMDS data 1-, TMDS data 2+, TMDS data 2-.
3. according to right 1 described a kind of anti-display system of peeping, it is characterized in that, described TMDS data receive the decode circuit, with the TMDS data of video card DVI interface be transformed to row synchronous HSYNC, field synchronization VSYNC, detect SCDT synchronously, the output data allow DE, output data clock ODCK, odd pixel QO(0-23), even pixel QE(0-23).
4. according to right 1 described a kind of anti-display system of peeping, it is characterized in that, described T ' trigger, input end CLK connects the field synchronization VSYNC that the TMDS data receive the decode circuit, and output terminal Q is as the sign of parity frame, Q be 1 o'clock be odd-numbered frame, Q be 0 o'clock be even frame, 0 and 1 of Q end will control the negate of even frame data and leading directly to of strange frame data, also control closing and opening of liquid crystal glasses, Q is that 1 o'clock liquid crystal glasses is opened, and Q is that 0 o'clock liquid crystal glasses is closed.
5. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that described controllable liquid crystal glasses, the liquid crystal of two eyeglasses are synchronously controlled by the output terminal Q of T ' trigger; Described control signal Q controls liquid crystal glasses by line, perhaps by infrared ray control liquid crystal glasses.
6. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that, the driving circuit of described data-signal and control signal, its function is that odd-numbered frame data QO is straight-through, even frame data QE reverse drive; Described QO, QE receive 24 road alternative selector switchs, form 24 bit data D(023) output; The output of described alternative selector switch is by the output Q control of T ' trigger, and during Q=1, output QO during Q=0, exports QE; Control signal is through the directly output of overdriving.
7. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that, described TMDS data coding and transtation mission circuit convert the signal of the driving circuit of data-signal and control signal to the TMDS data and export.
8. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that described display, its DVI interface receive the TMDS data of TMDS data coding and transtation mission circuit.
9. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that, describedly a kind ofly anti-ly peep display system, also comprise the 3.3V power supply.
10. a kind ofly anti-ly peep display system according to right 1 is described, it is characterized in that, describedly a kind ofly anti-ly peep display system, K switch is set, T ' trigger has out the set end in step
When K switch is closed,
Trigger set Q=l, the MUX in the driving circuit of data-signal and control signal is always straight-through, and display normally shows; When K disconnected, the anti-display system of peeping was opened.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210215639 CN102708833B (en) | 2012-03-28 | 2012-06-27 | Anti-peep display system |
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| CN201210086327.6 | 2012-03-28 | ||
| CN201210086327 | 2012-03-28 | ||
| CN 201210215639 CN102708833B (en) | 2012-03-28 | 2012-06-27 | Anti-peep display system |
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| CN102708833B true CN102708833B (en) | 2013-09-04 |
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| CN 201210215639 Expired - Fee Related CN102708833B (en) | 2012-03-28 | 2012-06-27 | Anti-peep display system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956152B (en) * | 2014-04-09 | 2016-03-02 | 山东师范大学 | The antidote of white screen in Anti-peep display system |
| CN104732942B (en) * | 2015-03-30 | 2017-03-15 | 山东师范大学 | A kind of anti-peeping display methods of improved microsystem |
| CN106129094B (en) * | 2016-07-29 | 2019-01-25 | 京东方科技集团股份有限公司 | A kind of display panel, its driving method and anti-peeping system |
| CN106448521A (en) * | 2016-09-14 | 2017-02-22 | 山东师范大学 | Anti-peeping display method and system thereof |
| CN113267909B (en) * | 2021-07-19 | 2021-10-08 | 军事科学院***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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| JPS61242164A (en) * | 1985-04-18 | 1986-10-28 | Ricoh Co Ltd | Image reading method |
| US7052746B2 (en) * | 2003-11-26 | 2006-05-30 | E. I. Du Pont De Nemour And Company | Privacy screen for a display |
| TW200725052A (en) * | 2005-12-30 | 2007-07-01 | Sumika Technology Inc | Privacy apparatus for liquid crystal display |
| KR101338997B1 (en) * | 2009-12-10 | 2013-12-09 | 엘지디스플레이 주식회사 | Transparent display device and electronic apparatus having thereor |
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| CN201689227U (en) * | 2010-04-12 | 2010-12-29 | 天马微电子股份有限公司 | Stereo display liquid crystal shutter glasses |
| CN102360136A (en) * | 2011-10-26 | 2012-02-22 | 南京中电熊猫液晶显示科技有限公司 | Anti-peep liquid crystal display |
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