CN110082936B

CN110082936B - Adjustable peep-proof display system based on liquid crystal light valve

Info

Publication number: CN110082936B
Application number: CN201910378481.2A
Authority: CN
Inventors: 孙刚; 吴立东; 周盼华
Original assignee: Zhejiang Jingjing Technology Co ltd
Current assignee: Chongqing hanlang Precision Technology Co.,Ltd.
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-04-21
Anticipated expiration: 2039-05-08
Also published as: CN110082936A

Abstract

The invention provides an adjustable peep-proof display system based on a liquid crystal light valve, which comprises a peep-proof device, a liquid crystal light valve control device and an adjustable fixing device, wherein the adjustable fixing device comprises a first fixing base and a second fixing base which are arranged at two ends of a display screen, the peep-proof device is wound on a first winding shaft, is adjusted by a first adjusting shaft, extends to the front of a display through a second opening, extends into a second shell through a fourth opening, and is adjusted by a second adjusting shaft and then is wound on a second winding shaft. According to the invention, the display and the peep-proof device are fixed on the adjustable fixing device in parallel, the peep-proof device comprises a plurality of peep-proof units with different peep-proof effects, the adjustable fixing device is controlled to realize the rapid switching of the peep-proof units, and each peep-proof unit is provided with two pairs of electrodes with different forms at two sides of the liquid crystal light valve so as to rapidly switch a unique privacy state and a shared state, so that a user dynamically adjusts the peep-proof device according to actual requirements to realize the required peep-proof effect.

Description

Adjustable peep-proof display system based on liquid crystal light valve

Technical Field

The invention relates to the technical field of liquid crystal light valves, in particular to an adjustable peep-proof display system based on a liquid crystal light valve.

Background

The existing peep-proof technology is mainly divided into a dynamically switchable peep-proof technology and an unmovable peep-proof technology.

The dynamic switching peep-proof technology includes the following technologies:

1) A3M peep-proof film is carried in a common backlight module, a PDLC (polymer dispersed liquid crystal) film, a smectic phase dimming film and the like are carried between the 3M peep-proof film and a display screen, and the privacy state and the sharing state are switched by utilizing the dimming film to switch between a full-transparent state and a scattering state. The scheme has the problems that the price of the 3M peep-proof film is higher, and the privacy effect is influenced by the poor visual angle of the PDLC in the fully transparent state; the smectic phase light-adjusting film has a high driving voltage and a too slow response speed at low temperature.

2) PDLC, smectic phase light modulation films and the like are carried in the collimation backlight module, and the scheme has the problems of high cost and low yield of the collimation backlight.

3) The electrode design is carried out in the TFT array, and the scheme has the problems of complex process, low yield and high cost.

4) The design is carried out on the backlight LED lamp strip and the light guide plate, the scheme has the problems that the optical design is complex, the theoretical node exists at present, and no related product is available.

In the use process of a user, especially in occasions where personnel such as meeting rooms, training classrooms and the like are frequently replaced, the peep-proof effect required by the user is different for different audience groups and different display contents. In the prior art, different peeping prevention effects are realized by replacing the types of the peeping prevention films, the replacing process is complex, the cost is high, errors are easy to occur, and the daily management of the peeping prevention films is time-consuming and labor-consuming.

Disclosure of Invention

The invention aims to provide an adjustable peep-proof display system based on a liquid crystal light valve, wherein a display and a peep-proof device are parallelly fixed on an adjustable fixing device, the peep-proof device comprises a plurality of peep-proof units with different peep-proof effects, the adjustable fixing device is controlled to realize the quick switching of the peep-proof units, and each peep-proof unit is provided with two pairs of electrodes with different shapes at two sides of the liquid crystal light valve so as to quickly switch a specific privacy state and a sharing state, so that a user dynamically adjusts the peep-proof device according to actual requirements to realize the required peep-proof effect.

In order to achieve the above purpose, with reference to fig. 1, the present invention provides an adjustable peep-proof display system based on a liquid crystal light valve, where the peep-proof display system includes a peep-proof device, a liquid crystal light valve control device, and an adjustable fixing device.

The peep-proof device is installed through the adjustable fixing device and completely covers the right front of the display screen, and an intermediate layer is arranged between the peep-proof device and the display screen.

The peep-proof device comprises:

1) the first base plate and the second base plate are arranged oppositely, and a gap is formed between the first base plate and the second base plate.

2) A first conductive electrode layer, a first insulating layer and a third conductive electrode layer which are sequentially deposited on the first substrate plate towards the second substrate plate.

3) A second conductive electrode layer, a second insulating layer and a fourth conductive electrode layer which are sequentially deposited on the second substrate plate towards the first substrate plate.

4) A PSCT liquid crystal layer sandwiched in the gap between the first substrate plate and the second substrate plate.

The first conductive electrode layer and the second conductive electrode layer are all whole-surface conductive electrode layers.

The first substrate plate, the second substrate plate, the first conductive electrode layer, the first insulating layer, the third conductive electrode layer, the second insulating layer and the fourth conductive electrode layer are made of transparent materials, and the first substrate plate and the second substrate plate are made of flexible materials.

Grid-shaped electrodes are etched on the third conductive electrode layer and the fourth conductive electrode layer, and the grid-shaped electrodes of the third conductive electrode layer and the fourth conductive electrode layer have the following characteristics:

the third conductive electrode layer and the fourth conductive electrode layer are projected along the vertical direction, and the width X of the generated projected etching area and the thickness H of the PSCT liquid crystal layer satisfy the following relation: H/X >5, the width W of the conductive region of the resulting projection and the thickness H of the PSCT liquid crystal layer satisfy the following relationship: H/W >1.5, W > X.

The liquid crystal light valve control device is respectively electrically connected with the first conductive electrode layer, the second conductive electrode layer, the third conductive electrode layer and the fourth conductive electrode layer, and adjusts voltage values on the first conductive electrode layer, the second conductive electrode layer, the third conductive electrode layer and the fourth conductive electrode layer according to an external instruction.

The adjustable fixing device comprises a first fixing base and a second fixing base which are arranged at two ends of the display screen, the first fixing base comprises a first shell, a first winding shaft and at least one first adjusting shaft, the first winding shaft and the at least one first adjusting shaft are fixed in the first shell, and the second fixing base comprises a second shell, a second winding shaft and at least one second adjusting shaft, the second winding shaft and the at least one second adjusting shaft are fixed in the second shell.

One side of the first shell facing the second shell is provided with a first opening and a second opening respectively, and one side of the second shell facing the first shell is provided with a third opening and a fourth opening respectively.

Two opposite side edges of the display are respectively embedded into the first shell and the second shell from the first opening and the third opening.

The first shell and the second shell are both in a cuboid shape, and the extending direction of the long edge of the first shell is parallel to the side edge of the display embedded in the first shell.

The first winding shaft and the first adjusting shaft are distributed between the first winding shaft and the second opening; the shaft center directions of the second winding shaft and the second adjusting shaft are the same as the extending direction of the long side of the second shell, and the second adjusting shaft is distributed between the second winding shaft and the fourth opening.

The peep-proof device is wound on the first winding shaft, is adjusted by the first adjusting shaft, extends to the front of the display through the second opening, extends into the second shell through the fourth opening, and is adjusted by the second adjusting shaft and then is wound on the second winding shaft.

The principle of the peep-proof device according to the invention is explained below.

The peep-proof device comprises a plurality of peep-proof units, the peep-proof effect of each peep-proof unit is different, and for convenience of description, grid electrodes of a third conductive electrode layer and a fourth conductive electrode layer of the following peep-proof units have the following characteristics:

along the display direction of display screen, the width of the conducting region of third conducting electrode layer increases gradually, and the width of the conducting region of fourth conducting electrode layer reduces gradually, and third conducting electrode layer and fourth conducting electrode layer project along vertical direction, and the projected conducting region of production is along the axis symmetric distribution of display screen.

For example, the PSCT liquid crystal layer is kept in a frosted state without being electrified, the empty state is kept without being electrified, and the display screen displays transversely.

1) When electric signals are applied to the first conductive electrode layer, the second conductive electrode layer, the third conductive electrode layer and the fourth conductive electrode layer, the PSCT liquid crystal layer is in a scattering state, and the display screen is completely shielded.

2) When the first conductive electrode layer and the second conductive electrode layer are applied with electric signals, the whole PSCT liquid crystal layer is driven to be in an empty state, the anti-peeping display system is in a shared state at the moment, and the visual angle of the anti-peeping display system is equivalent to that of a common display screen.

3) When electric signals are applied to the third conductive electrode layer and the fourth conductive electrode layer, the area which is not etched is changed into a clear state, the area which is etched still keeps a scattering state, a louver type grating is formed, light emitted in a certain small angle between the two gratings keeps the original direction unchanged, the picture is clear, light emitted in a certain angle is strongly scattered, and therefore the picture cannot be seen clearly, and the visual angle is limited in a narrow visual angle.

4) When the second conductive electrode layer and the third conductive electrode layer are applied with electric signals, assuming that the width of the conductive region of the third conductive electrode layer is gradually increased from left to right, that is, the width of the light-transmitting region of the grating is gradually increased from left to right, and at this time, a user on the left side of the display screen is affected by the viewing angle, so that the user on the right side of the display screen cannot see the whole display screen clearly.

5) Similarly, when the first conductive electrode layer and the fourth conductive electrode layer are applied with electric signals, since the width of the conductive region of the fourth conductive electrode layer is gradually reduced from left to right, that is, the width of the light-transmitting region of the grating is gradually narrowed from left to right, the user on the right side of the display screen is affected by the viewing angle at the moment, and cannot see the whole display screen, while the user on the left side of the display screen has a wider viewing angle for the user in the region, although the viewing angle of the display screen on the right side becomes smaller due to the dense shielding region.

For other kinds of peep-proof units, the application mode of the electric signal is the same as that of the peep-proof units, and different peep-proof effects are achieved according to different shapes of the grid electrodes on the third conductive electrode layer and the fourth conductive electrode layer of each peep-proof unit.

Regarding the switching method of the peep-proof unit, the switching method is realized through the adjustable fixing device, specifically, only the peep-proof unit covering the front of the display is used for generating the peep-proof effect, so that the peep-proof unit covering the front of the display is replaced by simultaneously rotating the first winding shaft and the second winding shaft to realize different peep-proof effects.

The adjusting shaft and the elastic fastening part are used for enabling the peep-proof device to be flatly and stably fixed in front of the display in parallel, so that the best peep-proof effect is achieved.

Compared with the prior art, the technical scheme of the invention has the following remarkable beneficial effects:

1) two pairs of electrodes in different forms are arranged on two sides of the liquid crystal light valve, so that the privacy state and the sharing state are displayed and switched rapidly.

2) The visual angle and brightness in the sharing state are almost the same as those in the state without the peep-proof device, and a narrow visual angle can be obtained in the privacy state.

3) Through adjusting the peep-proof unit that covers in the display place ahead, combine different electric signal application methods, the shielding region of dynamic adjustment privacy state.

4) And the multi-angle privacy display of the top display screen is realized by combining the annular grid electrode.

5) And the micro-adjustment of the privacy effect is realized by adjusting the distance of the middle area.

6) The type of the peep-proof unit adopted at present is judged by scanning the identification mark, and the peep-proof effect error caused by mechanical error is reduced.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of one example of an adjustable privacy display system based on a liquid crystal light valve according to the present invention.

Fig. 2 is a schematic structural diagram of another example of an adjustable privacy display system based on a liquid crystal light valve according to the present invention.

Fig. 3 is a schematic top view of one example of an adjustable privacy display system based on a liquid crystal light valve according to the present invention.

Fig. 4 is a schematic diagram of a rail structure of the adjustable anti-peeping display system based on the liquid crystal light valve of the present invention.

Fig. 5 is a schematic structural view of the peep preventing unit of the present invention.

Fig. 6 is a schematic view of a grid electrode of one of the privacy cells of the present invention.

Fig. 7 is a schematic view of a grid electrode of another privacy unit of the present invention.

Detailed Description

In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.

In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily defined to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.

With reference to fig. 1, the present invention provides a peep-proof display system based on a liquid crystal light valve, which includes a peep-proof device 30, a liquid crystal light valve control device, and an adjustable fixing device.

The peep-proof device 30 is installed by an adjustable fixing device and completely covers right in front of the display screen 20, and an intermediate layer is arranged between the peep-proof device and the display screen 20.

In fact, the anti-peeping display system of the present invention can be directly applied to the existing wide viewing angle display screen 20, and can be conveniently and rapidly switched between the private state and the shared state.

With reference to fig. 5, the peep-preventing device 30 comprises the following parts:

1) the first base plate 31 and the second base plate 32 are disposed opposite to each other with a gap between the first base plate 31 and the second base plate 32.

2) A first conductive electrode layer 33, a first insulating layer 35, and a third conductive electrode layer 37 deposited on the first base plate 31 in this order toward the second base plate 32.

3) A second conductive electrode layer 34, a second insulating layer 36, a fourth conductive electrode layer 38 deposited on the second base plate 32 in that order towards the first base plate 31.

4) A PSCT liquid crystal layer 39 sandwiched in the gap between the first substrate plate 31 and the second substrate plate 32, the PSCT liquid crystal layer 39 having two operating states: a transparent state and a frosted state.

The first conductive electrode layer 33 and the second conductive electrode layer 34 are all full-surface conductive electrode layers.

The first substrate plate 31, the second substrate plate 32, the first conductive electrode layer 33, the first insulating layer 35, the third conductive electrode layer 37, the second conductive electrode layer 34, the second insulating layer 36, and the fourth conductive electrode layer 38 are all made of transparent materials.

The first substrate plate 31 and the second substrate plate 32 are made of transparent flexible material, such as PET, PC, PMMA or any other organic and inorganic transparent material, and the thickness of the substrate plates can be 0-10 mm.

The first conductive electrode layer 33, the second conductive electrode layer 34, the third conductive electrode layer 37, and the fourth conductive electrode layer 38 may be any conductive material such as a nano silver wire, a carbon nanotube, ITO, and TZO, and preferably, the sheet resistance of the conductive electrode layer may be 0 to 1000 Ω.

The first insulating layer 35 and the second insulating layer 36 may be made of an insulating material such as silicon oxide or silicon nitride, and the higher the light transmittance, the better the insulating layer thickness is from 0 to 20 um.

The PSCT liquid crystal layer 39 is a layer of substance obtained by polymerization reaction of a mixture of nematic liquid crystal, a chiral agent, a polymerizable liquid crystal monomer and an initiator, and the thickness of the PSCT layer can be 0-500 um.

As can be seen from the foregoing, the thickness of the entire privacy protection device 30 is about 20mm, and since the first base plate 31, the second base plate 32, the first conductive electrode layer 33, the first insulating layer 35, the third conductive electrode layer 37, the second conductive electrode layer 34, the second insulating layer 36, and the fourth conductive electrode layer 38 are made of transparent materials with high light transmittance, when the PSCT liquid crystal layer is in a transparent state, the light transmittance of the privacy protection device 30 is very high, and the display effect of the display screen 20 is very slightly affected.

Grid-shaped electrodes are etched on the third conductive electrode layer 37 and the fourth conductive electrode layer 38, and the grid-shaped electrodes of the third conductive electrode layer 37 and the fourth conductive electrode layer 38 have the following characteristics:

the third and fourth conductive electrode layers 37 and 38 are projected in the vertical direction, and the width X of the resulting projected etched region and the thickness H of the PSCT liquid crystal layer satisfy the following relationship: H/X >5, the width W of the conductive region of the resulting projection and the thickness H of the PSCT liquid crystal layer satisfy the following relationship: H/W >1.5, W > X.

The liquid crystal light valve control device is electrically connected to the first conductive electrode layer 33, the second conductive electrode layer 34, the third conductive electrode layer 37, and the fourth conductive electrode layer 38, respectively, and adjusts voltage values on the first conductive electrode layer 33, the second conductive electrode layer 34, the third conductive electrode layer 37, and the fourth conductive electrode layer 38 according to an external instruction.

The peep-proof device 30 can set two operation modes by adjusting the operation state of the PSCT liquid crystal layer 39: the first working mode is continuously powered on when the privacy state is kept, and is not required to be powered on when the sharing state is kept; the second working mode is to continuously supply power when the sharing state is maintained, and does not need to supply power when the privacy state is maintained, and the user selects the peep-preventing device 30 in different modes according to the own requirements so as to reduce energy consumption, for example, the user can select the PSCT liquid crystal layer 39 which is powered off and is transparent and powered on and frosted when the user is in the sharing state for a long time.

Different grid-shaped electrodes (peep-proof units) have different peep-proof effects and the same peep-proof principle, and fig. 6 and 7 respectively show examples of grid-shaped electrodes of two kinds of peep-proof units.

First example

The grid-like electrodes of the third and fourth conductive electrode layers 37, 38 of the privacy unit have the following characteristics:

along the display direction of the display screen 20, the width of the conductive region 372 of the third conductive electrode layer 37 gradually increases, the width of the conductive region 382 of the fourth conductive electrode layer 38 gradually decreases, the third conductive electrode layer 37 and the fourth conductive electrode layer 38 are projected along the vertical direction, and the generated projected conductive regions are symmetrically distributed along the central axis of the display screen 20.

The peep-proof effect of this example is as described above, the display area can be divided into three parts, namely, the left part, the middle part and the right part, so that the dynamic adjustment of the peep-proof state of the three part areas can be realized.

Second example

in the display direction of the display screen 20, the third conductive electrode layer 37 and the fourth conductive electrode layer 38 include a full display area in the middle and peep prevention areas on both sides, the full display area is a conductive area, and the etching areas of the peep prevention areas are opposite and have the same width.

The privacy effect of this example is as follows:

the etching area is not arranged in the middle full display area, so that no matter how the electric signals are applied, the full display area is seen by a user in the whole display area, and different peep-proof effects are realized according to different applied electric signals by distributing the peep-proof areas on two sides. For example, when the third conductive electrode layer 37 and the fourth conductive electrode layer 38 apply an electric signal, both sides of the display screen 20 are not seen by the user on both sides of the display area, and so on.

Third example

in the display direction of the display screen 20, the

etched regions

371 and 381 of the third and fourth conductive electrode layers 37 and 38 are respectively located on two sides of the central axis of the display screen 20 and symmetrically distributed along the central axis of the display screen 20.

The privacy effect of this example is as follows:

if the etched area 371 of the third conductive electrode layer 37 is located on the left side of the central axis of the display screen 20 and the etched area 381 of the fourth conductive electrode layer 38 is located on the right side of the central axis of the display screen 20, when the first conductive electrode layer 33 and the fourth conductive electrode layer 38 apply electric signals, the left display screen 20 is opened to all users, the right display screen 20 is switched to the private state, and when the second conductive electrode layer 34 and the third conductive electrode layer 37 apply electric signals, the left display screen 20 is switched to the private state, and the right display screen 20 is opened to all users.

It should be understood that the foregoing three examples are only electrode arrangement modes of a part of the peep-proof units, and a user can set an electrode structure according to actual requirements to achieve different peep-proof effects.

The mounting of the peep prevention device 30 and the switching of the peep prevention unit are realized by an adjustable fixing device.

The adjustable fixing device comprises a first fixing base and a second fixing base which are arranged at two ends of the display screen 20, the first fixing base comprises a first shell 11, a first winding shaft 12 and at least one first adjusting shaft 13 which are fixed in the first shell 11, and the second fixing base comprises a second shell, a second winding shaft and at least one second adjusting shaft which are fixed in the second shell.

A first opening and a second opening 16 are respectively arranged on one side of the first shell 11 facing the second shell, and a third opening and a fourth opening are respectively arranged on one side of the second shell facing the first shell 11.

Two opposite sides of the display screen 20 are respectively embedded into the first shell 11 and the second shell from the first opening and the third opening.

The first casing 11 and the second casing are both rectangular, and the extending direction of the long sides of the first casing is parallel to the side of the display screen 20 embedded therein.

The axial center directions of the first winding shaft 12 and the first adjusting shaft 13 are the same as the extending direction of the long side of the first shell 11, and the first adjusting shaft 13 is distributed between the first winding shaft 12 and the second opening 16; the shaft center directions of the second winding shaft and the second adjusting shaft are the same as the extending direction of the long side of the second shell, and the second adjusting shaft is distributed between the second winding shaft and the fourth opening.

The peep-proof device 30 is wound around the first winding shaft 12, is adjusted by the first adjusting shaft 13, extends to the front of the display screen 20 through the second opening 16, extends into the second housing through the fourth opening, and is adjusted by the second adjusting shaft and then wound around the second winding shaft.

Preferably, the elastic fastening portions 14 are disposed at the second opening 16 and the fourth opening to further fix the peeping prevention device 30, so that the peeping prevention device is fixed in front of the display screen 20, and an optimal peeping prevention effect is achieved.

There are various ways of fixing the display 20, and two of them are described as examples below.

First fixing mode

Referring to fig. 2, the opposite side surfaces of the first housing 11 and the second housing are respectively provided with a first groove and a second groove, and the openings of the first groove and the second groove are respectively a first opening and a third opening.

Two opposite side edges of the display are respectively embedded into the first groove and the second groove from the first opening and the third opening.

Preferably, two opposite sides of the display are respectively fixed in the first groove and the second groove by fasteners such as screws and nuts

Second fixing mode

Referring to fig. 1 and 3, the first housing 11 and the second housing are respectively provided with a first fixing portion 15 and a second fixing portion on opposite side surfaces.

The first fixing portion 15 is provided with a first opening, and the second fixing portion is provided with a third opening.

The two opposite sides of the display are respectively embedded into the first fixing part 15 and the second fixing part from the first opening and the third opening.

Preferably, the first fixing portion 15 and the second fixing portion are detachable clamping tools.

The peep-proof device 30 and the display screen 20 are separated by a certain distance, that is, an intermediate layer is arranged, and the intermediate layer can be air or other transparent gas, or transparent adhesive such as transparent glue. But on the one hand is favorable to adjusting display screen 20's visual angle, through setting up the intermediate level, make the light beam refraction that display screen 20 sent go into peep-proof device 30 afterwards, the light of oblique incidence peep-proof device 30 is reflected by peep-proof device 30, and make a round trip to transmit the back in the intermediate level by the further scattering of PSCT light valve, make the light beam skew original path more, the peep-proof effect is better, on the other hand, peep-proof device 30 is as a protection device, help protecting display screen 20's safety, make display screen 20 difficult impaired.

Further, referring to fig. 4, when the second fixing manner is adopted, the first guide rail 17 and the second guide rail are respectively disposed on the opposite side surfaces of the first housing 11 and the second housing.

The first fixed part 15 is movably mounted on a first rail 17 and the second fixed part is movably mounted on a second rail.

The first fixing portion 15 and the second fixing portion are respectively connected with a motor through a transmission mechanism.

The motor is configured to adjust the rotation speed according to an external control command, and drive the transmission mechanism to push the first fixing portion 15 and the second fixing portion to move along the first guide rail 17 and the second guide rail, respectively, so as to adjust the thickness of the middle layer between the peep-proof device 30 and the display screen 20.

By adjusting the thickness of the intermediate layer between the peep-proof device 30 and the display screen 20, further adjustment of the peep-proof effect is achieved.

In other examples, one end of each peep-proof unit is provided with a recognizable mark, and the marks correspond to the peep-proof units one by one; the first housing 11 is provided with a scanning device capable of identifying marks, so as to identify the marks of the peep-proof units in the designated area.

Further, set up the mark in peep-proof unit's diagonal angle department or edge, scanning device sets up inside first casing 11 or second casing, and the mark does not have the sheltering from influence to the peep-proof effect.

In other examples, a fifth opening is disposed between the first and second openings 16 and a sixth opening is disposed between the third and fourth openings.

The peep-proof display system comprises a peep-proof adjusting device.

And a third adjusting shaft is arranged in the first shell 11, and a fourth adjusting shaft is arranged in the second shell.

Two ends of the peep-proof adjusting device are respectively wound on the first winding shaft 12 and the second winding shaft through the fifth opening, the third adjusting shaft, the sixth opening and the fourth adjusting shaft and are stacked below the peep-proof device 30.

Examples of first type of anti-peeking adjustment device

The peep-proof adjusting device and the peep-proof device 30 are identical in structure, and a better privacy state effect is achieved by arranging two layers of identical peep-proof units in front of the display screen 20.

Examples of second type of privacy adjustment device

Peep-proof adjusting device and peep-proof device 30 structure match each other, because the thickness in intermediate level is great to the influence of visual angle, consequently can be through setting up the peep-proof unit that two-layer range upon range of placing and grid form electrode match each other in display screen 20 the place ahead, realize more diversified privacy attitude visual angle.

The peep-proof display system is provided with a communication device, the communication device is electrically connected with the liquid crystal light valve control device, and the communication device is used for remotely controlling equipment such as the liquid crystal light valve control device and the adjustable fixing device, for example, the working state of the peep-proof display system is remotely switched in an infrared mode, a radio frequency mode, a Bluetooth mode, a wifi mode and the like.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. An adjustable peep-proof display system based on a liquid crystal light valve is characterized by comprising a peep-proof device, a liquid crystal light valve control device and an adjustable fixing device;

the peep-proof device is installed through the adjustable fixing device and completely covers the right front of the display screen, and an intermediate layer is arranged between the peep-proof device and the display screen;

the peep-proof device comprises:

the first base plate and the second base plate are oppositely arranged, and a gap is formed between the first base plate and the second base plate;

a first conductive electrode layer, a first insulating layer and a third conductive electrode layer which are sequentially deposited on the first substrate plate towards the second substrate plate;

a second conductive electrode layer, a second insulating layer and a fourth conductive electrode layer which are sequentially deposited on the second substrate plate towards the first substrate plate;

a PSCT liquid crystal layer sandwiched in the gap between the first substrate plate and the second substrate plate;

the first conductive electrode layer and the second conductive electrode layer are all full-surface conductive electrode layers;

the first substrate plate, the second substrate plate, the first conductive electrode layer, the first insulating layer, the third conductive electrode layer, the second insulating layer and the fourth conductive electrode layer are made of transparent materials, and the first substrate plate and the second substrate plate are made of flexible materials;

the third conductive electrode layer and the fourth conductive electrode layer are projected along the vertical direction, and the width X of the generated projected etching area and the thickness H of the PSCT liquid crystal layer satisfy the following relation: H/X >5, the width W of the conductive region of the resulting projection and the thickness H of the PSCT liquid crystal layer satisfy the following relationship: H/W >1.5, W > X;

the liquid crystal light valve control device is respectively electrically connected with the first conductive electrode layer, the second conductive electrode layer, the third conductive electrode layer and the fourth conductive electrode layer, and adjusts voltage values on the first conductive electrode layer, the second conductive electrode layer, the third conductive electrode layer and the fourth conductive electrode layer according to an external instruction;

the adjustable fixing device comprises a first fixing base and a second fixing base which are arranged at two ends of the display screen, the first fixing base comprises a first shell, a first winding shaft and at least one first adjusting shaft, the first winding shaft and the at least one first adjusting shaft are fixed in the first shell, and the second fixing base comprises a second shell, a second winding shaft and at least one second adjusting shaft, the second winding shaft and the at least one second adjusting shaft are fixed in the second shell;

a first opening and a second opening are respectively arranged on one side of the first shell facing the second shell, and a third opening and a fourth opening are respectively arranged on one side of the second shell facing the first shell;

two opposite side edges of the display screen are respectively embedded into the first shell and the second shell from the first opening and the third opening;

the first shell and the second shell are both in a cuboid shape, and the extending direction of the long side of the first shell is parallel to the side edge of the display screen embedded in the first shell;

the first winding shaft and the first adjusting shaft are distributed between the first winding shaft and the second opening; the shaft center directions of the second winding shaft and the second adjusting shaft are the same as the extension direction of the long side of the second shell, and the second adjusting shaft is distributed between the second winding shaft and the fourth opening;

the peep-proof device is wound on the first winding shaft, is adjusted by the first adjusting shaft, extends to the front of the display screen through the second opening, extends into the second shell through the fourth opening, and is adjusted by the second adjusting shaft and then wound on the second winding shaft;

the peep-proof device is divided into a plurality of peep-proof units, and the shape of the grid electrode of the third conductive electrode layer and the fourth conductive electrode layer of each peep-proof unit is different, and the peep-proof device comprises:

(1) along the display direction of the display screen, the width of a conductive area of the third conductive electrode layer is gradually increased, the width of a conductive area of the fourth conductive electrode layer is gradually decreased, the third conductive electrode layer and the fourth conductive electrode layer are projected along the vertical direction, and the generated projected conductive areas are symmetrically distributed along the central axis of the display screen; or

(2) Along the display direction of the display screen, the third conductive electrode layer and the fourth conductive electrode layer comprise a full display area in the middle and peep-proof areas on two sides, the full display area is a conductive area, and the etching areas of the peep-proof areas are opposite and have the same width; or

(3) Along the display direction of the display screen, the etching area of the third conductive electrode layer and the etching area of the fourth conductive electrode layer are respectively positioned on two sides of the central axis of the display screen and symmetrically distributed along the central axis of the display screen.

2. The adjustable privacy display system of claim 1, wherein elastic fastening portions are disposed at the second and fourth openings.

3. The adjustable peep-proof display system based on the liquid crystal light valve according to claim 1, wherein one end of each peep-proof unit is provided with a recognizable mark, and the marks correspond to the peep-proof units one by one; the first shell is provided with a scanning device capable of identifying the mark, and the scanning device is used for identifying the mark of the peep-proof unit in the designated area.

4. The adjustable privacy display system of claim 1, wherein a fifth opening is disposed between the first and second openings and a sixth opening is disposed between the third and fourth openings;

the peep-proof display system comprises a peep-proof adjusting device;

a third adjusting shaft is arranged in the first shell, and a fourth adjusting shaft is arranged in the second shell;

two ends of the peep-proof adjusting device are respectively wound on the first winding shaft and the second winding shaft through the fifth opening, the third adjusting shaft, the sixth opening and the fourth adjusting shaft and are stacked below the peep-proof adjusting device.

5. The adjustable privacy display system of claim 1, wherein the first and second housings have first and second fixing portions disposed on opposite sides thereof;

the first fixing part is provided with a first opening, and the second fixing part is provided with a third opening;

two opposite sides of the display screen are respectively embedded into the first fixing part and the second fixing part from the first opening and the third opening.

6. The adjustable privacy display system of claim 1, wherein the first and second housings have first and second rails disposed on opposite sides thereof, respectively;

the first fixing part is movably arranged on the first guide rail, and the second fixing part is movably arranged on the second guide rail;

the first fixing part and the second fixing part are respectively connected with a motor through a transmission mechanism;

the motor is set to adjust the rotating speed according to an external control instruction, and drives the transmission mechanism to push the first fixing part and the second fixing part to move along the first guide rail and the second guide rail respectively so as to adjust the thickness of the middle layer between the peep-proof device and the display screen.