CN110426901A - A kind of biliquid crystal layer display - Google Patents
A kind of biliquid crystal layer display Download PDFInfo
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- CN110426901A CN110426901A CN201910737623.XA CN201910737623A CN110426901A CN 110426901 A CN110426901 A CN 110426901A CN 201910737623 A CN201910737623 A CN 201910737623A CN 110426901 A CN110426901 A CN 110426901A
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- liquid crystal
- crystal layer
- glass
- display
- crystal cell
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133302—Rigid substrates, e.g. inorganic substrates
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
A kind of biliquid crystal layer display, using two liquid crystal layers, the first liquid crystal layer is shown for traditional image, and the second liquid crystal layer is inserted between the first liquid crystal layer and liquid crystal backlight, and the second liquid crystal layer is used to show the watermarking images of low resolution.Watermarking images use two kinds of display modes: one is the bright background of letter is dark, referred to as bright frame；One is alphabetical dark background is bright, referred to as spacer.Two kinds of frames are lighted every several milliseconds of alternatings, and the time that alternating is lighted cannot be greater than the vision residual time of human eye.Since the vision of human eye is remaining, when seeing screen, human eye will not realize the variation of backlight.The present invention can effectively prevent taking on the sly on TV, computer monitor or projector with liquid crystal display in the case where not influencing normal picture display.
Description
Technical field
The invention belongs to field of liquid crystal display, and in particular to a kind of biliquid crystal layer display.
Background technique
Liquid crystal display is the display being widely used at present, and common liquid crystal display is easy to be stolen by other people
It peeps, is such as shot by the first-class tool of miniature video camera, to cause the leakage of confidential information.For how preventing that takes on the sly to ask
Topic, the prior art provide effective solution scheme not yet, and often structure is complicated or will affect normal picture for the scheme of use
Viewing.Accordingly, it is desirable to provide anti-liquid crystal of taking on the sly that is a kind of of simple structure and low cost and will not influence normal picture viewing
Show device.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of biliquid crystal layer display.
To achieve the above object, the invention adopts the following technical scheme:
A kind of biliquid crystal layer display, which is characterized in that from back to front successively include: rear polarizer since backlight side
Piece, the second liquid crystal cell, the first liquid crystal cell and preceding polarizing film, wherein the second liquid crystal cell prevents the watermarking images of shooting for showing,
First liquid crystal cell is used for the display of normal picture.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
Further, the second liquid crystal cell from back to front successively include rear glass, alignment films, the second liquid crystal layer, alignment films and
Middle glass, the first liquid crystal cell successively include middle glass, alignment films, the first liquid crystal layer, alignment films and front glass, middle glass from back to front
Glass is used as the glass of two liquid crystal cells simultaneously, and the rear side of the front and rear sides of middle glass, the front side of rear glass and front glass plates
There are transparent electrode, rear glass and middle glass to pass through by opposite the second liquid crystal cell of electrode drive, front glass and middle glass opposite
The first liquid crystal cell of electrode drive.
Further, the light that backlight generates becomes polarised light, and polarization direction and second by preceding polarizing film is to the rear
The alignment films direction of liquid crystal cell is consistent；When light reaches the first liquid crystal cell, the alignment films direction one of polarization direction and the first liquid crystal cell
It causes, then passes through, otherwise do not pass through.
Further, the second liquid crystal layer shows that watermarking images, the first liquid crystal layer show normal picture.
Further, the image that watermarking images are made of letter and background, using two kinds of display modes: one is letters
The dark bright frame of bright background, one is the bright spacers of alphabetical dark background；Bright frame and spacer are lighted every several milliseconds of alternatings, alternately point
The bright time is not more than the vision residual time 100ms of human eye.
Further, the time alternately lighted is 10ms.
Further, the second liquid crystal layer uses TFT liquid crystal display, and the first liquid crystal layer uses simple matrix liquid crystal screen.
The beneficial effects of the present invention are: using the variation for increasing liquid crystal layer, in the case where not influencing normal picture display
It effectively prevent taking on the sly, it is low in cost, it is widely used, it can be on TV, computer monitor or projector with liquid crystal display.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of biliquid crystal layer display.
Fig. 2 is the spacer schematic diagram of watermarking images.
Fig. 3 is the bright frame schematic diagram of watermarking images.
Fig. 4 is the relation schematic diagram of time for exposure and bright frame, spacer.
Fig. 5 is shooting result schematic diagram.
Fig. 6 is roller shutter type exposure shooting schematic diagram.
Appended drawing reference is as follows: backlight 1, rear polarizer 2, the second liquid crystal cell 3, the first liquid crystal cell 4, preceding polarizing film 5, rear glass
Glass 6, alignment films 7, the second liquid crystal layer 8, alignment films 9, middle glass 10, alignment films 11, the first liquid crystal layer 12, alignment films 13, preceding glass
Glass 14.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.
Biliquid crystal layer display as shown in Figure 1, successively include: from back to front since 1 side of backlight rear polarizer 2,
Second liquid crystal cell 3, the first liquid crystal cell 4 and preceding polarizing film 5, the second liquid crystal cell 3 successively include rear glass 6, alignment films from back to front
7, the second liquid crystal layer 8, alignment films 9 and middle glass 10, the first liquid crystal cell 4 from back to front successively include middle glass 10, alignment films 11,
First liquid crystal layer 12, alignment films 13 and front glass 14, the glass as two liquid crystal cells simultaneously of middle glass 10, before middle glass 10
The rear side of two sides, the front side of rear glass 6 and front glass 14 is coated with transparent electrode afterwards, and rear glass 6 and middle glass 10 pass through phase
Pair the second liquid crystal cell of electrode drive 3, front glass 14 and middle glass 10 pass through opposite the first liquid crystal cell of electrode drive 4.
Second liquid crystal layer 8 shows that watermarking images, the first liquid crystal layer 12 show normal picture.Watermarking images are by letter and back
The image of scape composition, using two kinds of display modes: one is the bright frames that the bright background of letter is dark, as shown in Figure 2；One is alphabetical dark
The bright spacer of background, as shown in Figure 3.Bright frame and spacer are lighted every several milliseconds of alternatings, and the time that alternating is lighted is no more than people
The vision residual time 100ms of eye.
The light that backlight 1 generates by preceding polarizing film 5 rise it is to the rear become polarised light, and polarization direction and the second liquid crystal cell 3
Alignment films it is consistent, by the second liquid crystal cell 3, change the electrode voltage on the glass of two sides, thus it is possible to vary the arrangement of liquid crystal molecule
Realize the change of light polarization direction or constant in pixel domain.When light reaches the first liquid crystal cell 4, polarization direction and the first liquid crystal cell
4 alignment films direction is consistent, can pass through, otherwise does not pass through.In this way, the display of bright frame and spacer is realized.Together
When the first liquid crystal cell as common liquid crystal display, show picture.
The basic principle of biliquid crystal layer display of the invention is as follows: display uses two liquid crystal layers, the first liquid crystal layer
It is shown for traditional image, TFT liquid crystal display can be used；The second liquid crystal is inserted between liquid crystal layer and liquid crystal backlight at first
Layer, the second liquid crystal layer are used to show the watermarking images of low resolution, and resolution ratio depends on the resolution requirement of watermarking images, generally
It is not high for the watermark resolution requirement of image, system can be reduced such as simple matrix liquid crystal screen using the liquid crystal film of low resolution
Cause this.
Watermarking images use two kinds of display modes: one is the bright background of letter dark (referred to as bright frame), one is alphabetical dark back
Jing Liang (referred to as spacer).Two kinds of frames are lighted every several milliseconds of alternatings, and the vision that the time that alternating is lighted cannot be greater than human eye is residual
It is remaining time, i.e. 100ms, general using in 10ms or so in order to guarantee the comfort level of human eye viewing.Since the vision of human eye is residual
Remaining, when seeing screen, human eye will not realize the variation of backlight.
When being shot using camera:
Using global exposure, aperture time is generally 1/60-1/18000s.
By taking 1/60s as an example, time for exposure 14.44ms.Such as alternately lighted using 10ms, then within a time for exposure,
It is likely to occur bright frame, the time difference that spacer occupies, causes the image of shooting inconsistent in the backlight illumination of different location.Such as figure
Shown in 4, the single exposure time is segmented into two parts, bright frame time T1 and spacer time T2, then for the pixel of Projection Display
Point, is segmented into two classes, and one kind is the point fallen on letter and does not fall in the point on letter.For falling in its back of the point on letter
Brightness are as follows:
For point its backlight illumination not on letter are as follows:
The comparison of the two:
Wherein I (t) is the function that luminous intensity changes over time when each luminous tube is opened in backlight dot matrix, generally
One constant.If the time of spacer is longer than the time of bright frame, projector image is higher than other positions in the brightness of character position
It sets, a highlighted letter is shown on picture, as shown in Figure 5.Otherwise there is a dark letter.When aperture time is into one
Step is reduced, then is likely to occur and only image or contrary circumstance occurs in character position.
The camera exposed using roller shutter type, the sweep time of every a line are much smaller than 10ms.It, may be only in a line scanning
There are bright frame or spacer to light.Occurs striped situation on the image, as shown in Figure 6.
It should be noted that the term of such as "upper", "lower", "left", "right", "front", "rear" cited in invention, also
Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (7)
1. a kind of biliquid crystal layer display, which is characterized in that since backlight (1) side from back to front successively include: rear polarizer
Piece (2), the second liquid crystal cell (3), the first liquid crystal cell (4) and preceding polarizing film (5), wherein second liquid crystal cell (3) is for showing
The watermarking images of shooting are prevented, first liquid crystal cell (4) is used for the display of normal picture.
2. a kind of biliquid crystal layer display as described in claim 1, it is characterised in that: the second liquid crystal cell (3) You Houzhi
Preceding successively includes rear glass (6), alignment films (7), the second liquid crystal layer (8), alignment films (9) and middle glass (10), the first liquid crystal cell
It (4) from back to front successively include middle glass (10), alignment films (11), the first liquid crystal layer (12), alignment films (13) and front glass
(14), the middle glass (10) glass as two liquid crystal cells simultaneously, the front and rear sides of middle glass (10), rear glass (6)
The rear side of front side and front glass (14) is coated with transparent electrode, and the rear glass (6) and middle glass (10) pass through opposite electricity
Pole drives the second liquid crystal cell (3), and the front glass (14) and middle glass (10) pass through opposite the first liquid crystal cell of electrode drive
(4).
3. a kind of biliquid crystal layer display as claimed in claim 2, it is characterised in that: the light warp that the backlight (1) generates
Cross preceding polarizing film (5) rise it is to the rear become polarised light, and polarization direction is consistent with alignment films (7) direction of the second liquid crystal cell (3)；Light
When reaching the first liquid crystal cell (4), polarization direction and alignment films (11) direction of the first liquid crystal cell (4) are consistent, then pass through, on the contrary
Do not pass through.
4. a kind of biliquid crystal layer display as claimed in claim 2, it is characterised in that: second liquid crystal layer (8) shows water
Watermark image, first liquid crystal layer (12) show normal picture.
5. a kind of biliquid crystal layer display as claimed in claim 4, it is characterised in that: the watermarking images are by letter and back
The image of scape composition, using two kinds of display modes: one is the bright frame that the bright background of letter is dark, one is bright dark of alphabetical dark background
Frame；The bright frame and spacer are lighted every several milliseconds of alternatings, and the time that alternating is lighted is not more than the vision residual time of human eye
100ms。
6. a kind of biliquid crystal layer display as claimed in claim 5, it is characterised in that: the time that the alternating is lighted is
10ms。
7. a kind of biliquid crystal layer display as claimed in claim 2, it is characterised in that: second liquid crystal layer (8) uses TFT
Liquid crystal display, the first liquid crystal layer (12) use simple matrix liquid crystal screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737623.XA CN110426901A (en) | 2019-08-09 | 2019-08-09 | A kind of biliquid crystal layer display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737623.XA CN110426901A (en) | 2019-08-09 | 2019-08-09 | A kind of biliquid crystal layer display |
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| CN110426901A true CN110426901A (en) | 2019-11-08 |
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| CN201910737623.XA Pending CN110426901A (en) | 2019-08-09 | 2019-08-09 | A kind of biliquid crystal layer display |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101405645A (en) * | 2006-05-31 | 2009-04-08 | 夏普株式会社 | Display system |
| CN102955321A (en) * | 2011-08-12 | 2013-03-06 | 株式会社日本显示器东 | Display device |
| CN104269150A (en) * | 2014-10-14 | 2015-01-07 | 中国科学院信息工程研究所 | Privacy protection display implementation method based on visual passwords |
| CN106249467A (en) * | 2016-10-31 | 2016-12-21 | 宁波万维显示科技有限公司 | Bore hole 3D display device and preparation method thereof |
| CN208013618U (en) * | 2018-04-19 | 2018-10-26 | 薛宝 | A kind of anti-peeping screen, anti-peeping glasses and anti-peeping system |
| CN109917554A (en) * | 2017-12-13 | 2019-06-21 | 夏普株式会社 | 3 d display device |
| CN110099261A (en) * | 2019-02-22 | 2019-08-06 | 南京工程学院 | A kind of LED dot matrix backlight, projection arrangement and the projecting method of projection device |
-
2019
- 2019-08-09 CN CN201910737623.XA patent/CN110426901A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101405645A (en) * | 2006-05-31 | 2009-04-08 | 夏普株式会社 | Display system |
| CN102955321A (en) * | 2011-08-12 | 2013-03-06 | 株式会社日本显示器东 | Display device |
| CN104269150A (en) * | 2014-10-14 | 2015-01-07 | 中国科学院信息工程研究所 | Privacy protection display implementation method based on visual passwords |
| CN106249467A (en) * | 2016-10-31 | 2016-12-21 | 宁波万维显示科技有限公司 | Bore hole 3D display device and preparation method thereof |
| CN109917554A (en) * | 2017-12-13 | 2019-06-21 | 夏普株式会社 | 3 d display device |
| CN208013618U (en) * | 2018-04-19 | 2018-10-26 | 薛宝 | A kind of anti-peeping screen, anti-peeping glasses and anti-peeping system |
| CN110099261A (en) * | 2019-02-22 | 2019-08-06 | 南京工程学院 | A kind of LED dot matrix backlight, projection arrangement and the projecting method of projection device |
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