CN217739660U - Peep-proof display - Google Patents
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- CN217739660U CN217739660U CN202221910831.9U CN202221910831U CN217739660U CN 217739660 U CN217739660 U CN 217739660U CN 202221910831 U CN202221910831 U CN 202221910831U CN 217739660 U CN217739660 U CN 217739660U
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Abstract
The application discloses peep-proof display contains display panel, turns to module and control circuit. The display panel has a plurality of pixels. The turning module is arranged in the light-emitting direction of the display panel and is provided with a plurality of turning units, and the turning units are arranged corresponding to the pixels of the display panel. The control circuit is electrically connected with the steering module. When the control circuit is in a non-conducting state, the peep-proof display is in a first peep-proof mode, and when the control circuit is in a conducting state, the plurality of steering units of the steering module enable light emitted by the plurality of pixels to generate a phase difference so that the peep-proof display is in a second peep-proof mode.
Description
Technical Field
The application relates to the technical field of displays, in particular to a peep-proof display.
Background
In the conventional display with the peep-proof function, although the information on the display can be effectively prevented from being watched by other people except the user in the peep-proof mode, the peep-proof mode of the display needs to be released when the information on the display is shared with a second person at a specific visual angle for watching and discussing. At this time, other people than the user and the second person have an opportunity to view the information on the display, resulting in a risk of leakage of the information.
Accordingly, there is a need in the art to provide a privacy-protected display that can share information on the display with a specific object when the privacy-protected display is in a privacy-protected mode.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present application is implemented as follows: a peep-proof display is provided, which comprises a display panel, a steering module and a control circuit. The display panel has a plurality of pixels. The turning module is arranged in the light emitting direction of the display panel and is provided with a plurality of turning units, and the plurality of turning units are arranged corresponding to the plurality of pixels of the display panel. The control circuit is electrically connected with the steering module. When the control circuit is in a non-conducting state, the peep-proof display is in a first peep-proof mode, and when the control circuit is in a conducting state, the plurality of steering units of the steering module enable light emitted by the plurality of pixels to generate a phase difference so that the peep-proof display is in a second peep-proof mode.
In the anti-peeping display of the present application, the plurality of turning units include a plurality of red light turning units, a plurality of green light turning units and a plurality of blue light turning units.
In the peep-proof display of the present application, each of the plurality of red light turning units, the plurality of green light turning units and the plurality of blue light turning units has a first substrate, a plurality of first electrodes, a liquid crystal layer, a second electrode and a second substrate, and the plurality of first electrodes, the liquid crystal layer, the second electrode and the second substrate are sequentially disposed on the first substrate.
In the privacy display of the present application, the wavelength λ of light emitted from each of the plurality of pixels, the phase difference Δ Φ of light passing through two adjacent turning units, the driving refractive index difference Δ n of the turning units, the width L of the two adjacent turning units, the liquid crystal thickness t, and the turning angle θ satisfy the following relationship: Δ φ =2 π Δ nt/λ =2 π L sin θ/λ = m2 π
Wherein m is an integer.
In the anti-peeping display of the present application, when at least one of the plurality of pixels is a red pixel, the plurality of red light turning units are correspondingly disposed above the red pixel, and the turning angle θ is 40 degrees, the phase difference Δ Φ is 2 pi, the liquid crystal thickness t is 2.6 microns, and m is 1, the driving refractive index difference Δ n of the red light turning units is 0.25, and the width L of two adjacent red light turning units is 1.011 microns.
In the privacy display of the present application, when at least one of the plurality of pixels is a green pixel, the plurality of green light turning units are correspondingly disposed above the green pixel, and the turning angle θ is 40 degrees, the phase difference Δ Φ is 2 pi, the liquid crystal thickness t is 2.6 microns, and m is 1, the green light turning unit has a driving refractive index difference Δ n of 0.2115, and the width L of two adjacent green light turning units is 0.856 microns.
In the anti-peeping display of the present application, when at least one of the plurality of pixels is a blue pixel, the plurality of blue light turning units are correspondingly disposed above the blue pixel, and the turning angle θ is 40 degrees, the phase difference Δ Φ is 2 pi, the liquid crystal thickness t is 2.6 microns, and m is 1, the blue light turning unit has a driving refractive index difference Δ n of 0.17305, and the width L of two adjacent blue light turning units is 0.7 microns.
In the anti-peeping display of the present application, when at least one of the plurality of pixels is a red pixel, the plurality of red light turning units are correspondingly disposed above the red pixel, and the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is 2, the phase difference Δ φ is 4 π, and the red light turning units have a driving refractive index difference Δ n R Is 0.5 and the width L of two adjacent red turning cells is 2.022 microns.
In the anti-peeping display of the present application, when at least one of the plurality of pixels is a green pixel, the plurality of green light turning units are correspondingly disposed above the green pixel, and the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is 2, the phase difference Δ Φ is4 pi, the green light steering cell has a driving refractive index difference Δ n G Is 0.423 and the width L of two adjacent green steering cells is 1.712 microns.
In the anti-peeping display of the present application, when at least one of the plurality of pixels is a blue pixel, the plurality of blue light turning units are correspondingly disposed above the blue pixel, and the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is 2, the phase difference Δ φ is 4 π, and the blue light turning units have a driving refractive index difference Δ n B Is 0.3462 and the width L of two adjacent blue steering cells is 1.4 microns.
In the privacy display of the present application, the liquid crystal driving refractive index difference of the liquid crystal layer is Δ n L And a difference Δ n in driving refractive index of the liquid crystal L Greater than the driving refractive index difference Deltan of the red light steering unit R Green light turning unit driving refractive index difference delta n G And a driving refractive index difference Deltan of the blue light turning unit B The value of (1) is the maximum.
In the anti-peeping display of the present application, an electrode distance d exists between two adjacent electrodes, and the width L =2d of two adjacent turning units.
In the anti-peeping display of the present application, the first electrode and the second electrode are transparent conductive electrodes.
In the peep-proof display of the application, the control circuit is a switch module.
In the embodiment of the application, through the arrangement of the steering module, the peep-proof display can still share the information on the display to the specific second person even in the peep-proof mode, and still has the peep-proof effect on other people except the user and the second person.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a top view of a privacy display of the present application.
Fig. 2 is a front view of the privacy display of the present application.
Fig. 3 is a partially enlarged view of the area a in fig. 1.
Fig. 4 is a partially enlarged view of the region B in fig. 2.
Fig. 5 is a sectional view taken along line C-C' in fig. 4.
Fig. 6 is a schematic view of the privacy display of the present application in a first privacy mode.
Fig. 7 is a schematic view of the privacy display of the present application in a second privacy mode.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and fig. 2, a privacy protection display 100 of the present application includes a display panel 200, a steering module 300, and a control circuit 500. The display panel 200 has a plurality of pixels 210 arranged in an array. The turning module 300 is disposed in the light emitting direction (i.e. the front) of the display panel 200, as shown in fig. 3, the turning module 300 has a plurality of turning units 400, and the plurality of turning units 400 are disposed corresponding to the plurality of pixels 210 of the display panel 200. The control circuit 500 is electrically connected to the steering module 300. When the control circuit 500 is in the non-conducting state, the privacy display 100 is in the first privacy mode, and when the control circuit 500 is in the conducting state, the plurality of turning units 400 of the turning module 300 generate a phase difference between the light emitted by the plurality of pixels 210, so that the privacy display 100 is in the second privacy mode.
In detail, referring to fig. 3, the plurality of steering units 400 may include a plurality of red steering units 400R, and at least one of the plurality of pixels 210 is a red pixel 210R, such that the plurality of red steering units 400R are correspondingly disposed above the red pixel 210R. That is, only a plurality of red light turning units 400R are correspondingly disposed above each red pixel 210R, so as to turn the red light emitted by the red pixels 210R. In the present embodiment, as shown in fig. 3 and 4, the number of the red light diverting units 400R disposed above the red pixel 210R is five, which is merely exemplary and not limiting. In other words, the number of the red light diverting units 400R disposed above the red pixels 210R can be configured according to different requirements.
Referring to fig. 3 again, the plurality of turning units 400 may further include a plurality of green light turning units 400G and a plurality of blue light turning units 400B, and at least one of the plurality of pixels 210 may be a green pixel 210G or a blue pixel 210B, such that the plurality of green light turning units 400G are only correspondingly disposed above the green pixel 210G, and the plurality of blue light turning units 400B are only correspondingly disposed above the blue pixel 210B, thereby turning the green light and the blue light emitted by the green pixel 210G and the blue pixel 210B, respectively.
In the present embodiment, the number of the green light turning units 400G disposed above the green pixels 210G is six, and the number of the blue light turning units 400B disposed above the blue pixels 210B is seven, which are only used for illustration and not intended to be limiting. In other words, the number of the green light steering units 400G disposed above the green pixels 210G and the number of the blue light steering units 400B disposed above the blue pixels 210B may also be configured according to different requirements.
The present application utilizes the operation principle of the liquid crystal antenna to turn the light emitted from the display panel 200, and the operation method thereof is described as follows.
First, as shown in fig. 3, each of the red light turning units 400R, the green light turning units 400G and the blue light turning units 400B has a first substrate 410, a plurality of first electrodes 420, a liquid crystal layer 430, a second electrode 440 and a second substrate 450, and the plurality of first electrodes 420, the liquid crystal layer 430, the second electrode 440 and the second substrate 450 are sequentially disposed on the first substrate 410. The first substrate 410, the liquid crystal layer 430, the second electrode 440, and the second substrate 450 are shared. When different potentials are applied to the first electrodes 420, the refractive index of the liquid crystal in the liquid crystal layer 430 can be changed, so that the visible light (e.g., the red light emitted from the red pixel 210R, the green light emitted from the green pixel 210G, and the blue light emitted from the blue pixel 210B) incident into the liquid crystal layer 430 from below can be turned around due to the change of the refractive index of the liquid crystal. When the wavelength of light emitted from each of the plurality of pixels 210 is defined as λ, the phase difference generated by the light passing through two adjacent turning cells is defined as Δ Φ, and the driving refractive index difference of the turning cells 400 is defined as Δ n, the above parameters and the liquid crystal thickness t of the liquid crystal layer 430, the width L of two adjacent turning cells 400, and the turning angle θ of the light in fig. 5 satisfy the following relationships: Δ φ =2 π Δ n t/λ =2 π Lsin θ/λ = m2 π; wherein m is an integer.
Thus, according to the above relation, when at least one of the pixels 210 is a red pixel 210R, the red light steering units 400R are correspondingly disposed above the red pixel 210R, the fixed steering angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is an integer 1, the phase difference Δ φ is 2 π, and the driving refractive index difference Δ n of the red light steering unit 400R can be obtained R Is 0.25 and the width L of two adjacent red light turning units 400R is 1.011 micrometers.
Similarly, when at least one of the pixels 210 is a green pixel 210G, the green light turning units 400G are correspondingly disposed above the green pixel 210G, the fixed turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is an integer 1, the phase difference Δ φ is 2 π, and the driving refractive index difference Δ n of the green light turning unit 400G can be obtained G Is 0.2115 and the width L of two adjacent green steering cells 400G is 0.856 microns. When at least one of the pixels 210 is a blue pixel 210B, the blue light turning units 400B are correspondingly disposed above the blue pixel 210B, the fixed turning angle theta is 40 degrees, the liquid crystal thickness t is 2.6 micrometers, and m is an integer 1, the phase difference delta phi is 2 pi, and the driving refractive index difference delta n of the blue light turning unit 400B can be obtained B Is 0.17305 and the width L of two adjacent blue light turning units 400B is 0.7 microns.
That is, when the steering angle θ of the fixed privacy display 100 is 40 degrees, the phase difference Δ φ is 2 π, the liquid crystal thickness t is 2.6 microns, and m is an integer of 1, the driving refractive index difference Δ n of the red light steering unit 400R can be respectively obtained R 0.25, the driving refractive index difference Deltan of the green light-redirecting unit 400G G Is 0.2115, and the driving refractive index difference Δ n of the blue light-steering cell 400B B Was 0.17305. Thus, the driving refractive index difference Δ n of the liquid crystal layer 430 can be controlled L Greater than the driving refractive index difference Δ n that the red light steering unit 400R has R The green light turning unit 400G has a driving refractive index difference Δ n G And the driving refractive index difference Deltan that the blue light turning unit 400B has B The largest value (i.e., 0.25 of the red light turning unit 400R in the present embodiment) enables the red light, the green light and the blue light incident on the liquid crystal layer 430 to have a turning angle of 40 degrees due to the variation of the refractive index of the liquid crystal.
In another embodiment, when the fixed privacy display 100 has a turning angle θ of 40 degrees, a liquid crystal thickness t of 2.6 microns, and m is an integer 2, and the phase difference Δ φ is 4 π, the driving refractive index difference Δ n of the red light turning unit 400R can be obtained respectively R 0.5, the difference Δ n in driving refractive index of the green light steering unit 400G G Is 0.423 and the driving refractive index difference Δ n of the blue light turning cell 400B B Is 0.3462. At this time, the width L of two adjacent red light turning units 400R is 2.022 micrometers, the width L of two adjacent green light turning units 400G is 1.712 micrometers, and the width L of two adjacent blue light turning units 400B is 1.4 micrometers.
That is, by defining different turning angles θ, phase differences Δ Φ, liquid crystal thicknesses t and m as other integers, the driving refractive index difference Δ n of different turning units 400 and the widths L of two adjacent turning units 400 can be obtained, thereby fabricating corresponding turning modules 300.
Referring to fig. 5 again, in the privacy protection display 100 of the present application, an electrode distance d exists between two adjacent first electrodes 420, and the width L =2d of two adjacent turning units 400. Since the liquid crystal layer 430 of each red light turning unit 400R, each green light turning unit 400G, and each blue light turning unit 400B is shared, it is difficult to measure the width L of two adjacent turning units 400 (including two adjacent red light turning units 400R, two adjacent green light turning units 400G, and two adjacent blue light turning units 400B), so that the calculation of the width L of two adjacent turning units 400 can be completed by using the electrode distance d between two adjacent first electrodes 420.
As shown in fig. 4, the plurality of first electrodes 420 are vertically disposed along the horizontal direction X in the light emitting direction of the display panel 200, so as to control the deflection angle of the light emitted from the display panel 200 relative to the light emitting direction. The first electrode 420 and the second electrode 440 are transparent conductive electrodes, and are preferably Indium Tin Oxide (ITO) electrodes.
The control circuit 500 may be a switch module, and the turning on and off of the steering module 300 can be controlled by the operation of the switch module. For example, when the control circuit 500 is turned off, the privacy display 100 is in the first privacy mode. That is, as shown in fig. 6, only the user P1 in front of the first visual area VA1 can view the image on the display panel 200 through the turning module 300, and the second person P2 and the third person P3 outside the first visual area VA1 cannot view the image on the display panel 200.
When the control circuit 500 is turned on and in the on state, the privacy display 100 may be in the second privacy mode. That is, as shown in fig. 7, only the user P1 located in front of the first visual region VA1 and the second person P2 located on the second visual region VA2 (e.g. 40 degrees as mentioned above) can view the image on the display panel 200 deflected by the steering module 300, and the third person P3 located outside the first visual region VA1 and the second visual region VA2 still cannot view the information on the display panel 200.
It should be noted that, when the privacy display 100 is in the second privacy mode, the user P1 in front of the first visual area VA1 and the second person P2 in the second visual area VA2 can both view the image on the display panel 200 because a portion of the light between the adjacent turning units 400 in the turning module 300 is not deflected. The reason why the light between the adjacent turning units 400 is not deflected is because the liquid crystal in this region is not completely deflected by the electric field of the turning units 400 (i.e. the liquid crystal in this region is located outside the driving range of the turning units 400), so that the above characteristics can be utilized to use the undeflected light for the user P1 in front of the first viewing zone VA1 and the deflected light for the second person P2 at a specific viewing angle (e.g. 40 degrees of the second viewing zone VA 2).
When the privacy display 100 is in the second privacy mode, the user P1 in the first visual area VA1 and the second person P2 in the second visual area VA2 may have a brightness difference when viewing images, and the brightness difference can be further improved by controlling the backlight brightness.
In summary, in the embodiment of the present application, through the arrangement of the turning module 300 and the operation principle of the liquid crystal antenna, the red light turning units 400R, the green light turning units 400G, and the blue light turning units 400B on the turning module 300 can respectively deflect the red light emitted by the red pixel 210R, the green light emitted by the green pixel 210G, and the blue light emitted by the blue pixel 210B in the pixels 210. In this way, even if the privacy display 100 is in the privacy mode, the information on the display panel 200 can still be shared with the specific second person P2, and the privacy effect can still be maintained for the user P1 and the other people P3 except the second person P2.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
While the present embodiments have been described with reference to the accompanying drawings, the present embodiments are not limited to the above embodiments, which are merely illustrative and not restrictive, and those skilled in the art can now make various changes and modifications without departing from the spirit and scope of the present invention.
Claims (14)
1. A privacy display, comprising:
a display panel having a plurality of pixels;
the turning module is arranged in the light emergent direction of the display panel and is provided with a plurality of turning units, and the turning units are arranged corresponding to the pixels of the display panel; and
the control circuit is electrically connected with the steering module;
when the control circuit is in a non-conducting state, the peep-proof display is in a first peep-proof mode, and when the control circuit is in a conducting state, the plurality of steering units of the steering module enable light emitted by the plurality of pixels to generate phase difference, so that the peep-proof display is in a second peep-proof mode.
2. The privacy display of claim 1, wherein the plurality of turning units comprise a plurality of red turning units, a plurality of green turning units, and a plurality of blue turning units.
3. The privacy display of claim 2, wherein the plurality of red light turning units, the plurality of green light turning units, and the plurality of blue light turning units each have a first substrate, a plurality of first electrodes, a liquid crystal layer, a second electrode, and a second substrate, and the plurality of first electrodes, the liquid crystal layer, the second electrode, and the second substrate are sequentially disposed on the first substrate.
4. The privacy display of claim 3, wherein the wavelength λ of light emitted from each of the plurality of pixels, the phase difference Δ Φ of the light generated by two adjacent turning units, the driving refractive index difference Δ n of the turning units, the widths L of the two adjacent turning units, the liquid crystal thickness t, and the turning angle θ satisfy the following relationship:
Δφ＝2πΔn t/λ＝2πL sinθ/λ＝m2π
wherein m is an integer.
5. The privacy-protection display of claim 4, wherein when at least one of the pixels is a red pixel, the red light turning units are correspondingly disposed above the red pixel, the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 μm, and m is 1, the phase difference Δ φ is 2 π, and the red light turning units have a driving refractive index difference Δ n R Is 0.25 and the width L of two adjacent red light turning units is 1.011 micrometers.
6. The privacy display of claim 4, wherein when at least one of the pixels is a green pixel, the green turning units are correspondingly disposed above the green pixel, the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 μm, and m is 1, the phase difference Δ φ is 2 π, and the green turning units have a driving refractive index difference Δ n G Is 0.2115 and the width L of two adjacent green turning cells is 0.856 microns.
7. The privacy display of claim 4, wherein when at least one of the plurality of pixels is a blue pixel, the plurality of blue light turning units are correspondingly disposed above the blue pixel, the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is 1, the phase difference Δ φ is 2 π, and the blue light turning units have a driving refractive index difference Δ n B Is 0.17305, and the width L of two adjacent blue light turning units is 0.7 micrometer.
8. The privacy display of claim 4, wherein when at least one of the pixels is a red pixel, the red light turning units are correspondingly disposed above the red pixel, the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 μm,when m is 2, the phase difference delta phi is 4 pi, and the red light steering unit has a driving refractive index difference delta n R Is 0.5 and the width L of two adjacent red light turning units is 2.022 microns.
9. The privacy display of claim 4, wherein when at least one of the pixels is a green pixel, the green light turning units are correspondingly disposed above the green pixel, the turning angle θ is 40 degrees, the liquid crystal thickness t is 2.6 microns, and m is 2, the phase difference Δ ψ is 4 π, and the green light turning units have a driving refractive index difference Δ n G Is 0.423 and the width L of two adjacent green steering cells is 1.712 microns.
10. The privacy-protection display of claim 4, wherein when at least one of the plurality of pixels is a blue pixel, the plurality of blue light redirecting units are correspondingly disposed above the blue pixel, the redirecting angle θ is 40 degrees, the liquid crystal thickness t is 2.6 μm, and m is 2, the phase difference Δ ψ is 4 π, and the blue light redirecting units have a driving refractive index difference Δ n B Is 0.3462 and the width L of the two adjacent blue light turning units is 1.4 microns.
11. The privacy display of any one of claims 5-10, wherein the liquid crystal layer has a liquid crystal drive refractive index difference Δ n L And the difference of the driving refractive index Δ n of the liquid crystal L Greater than the drive refractive index difference Deltan of the red light steering unit R A difference Δ n in driving refractive index of the green light turning unit G And a driving refractive index difference Deltan of the blue light turning unit B The highest value in (1).
12. The privacy display of claim 4, wherein adjacent electrodes have an electrode spacing d therebetween, and wherein the width L =2d of adjacent turning units.
13. The privacy display of claim 3, wherein the first electrode and the second electrode are transparent conductive electrodes.
14. The privacy display of claim 1, wherein the control circuit is a switch module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111207159U TWM633484U (en) | 2022-07-05 | 2022-07-05 | Privacy display |
| TW111207159 | 2022-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217739660U true CN217739660U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221910831.9U Active CN217739660U (en) | 2022-07-05 | 2022-07-21 | Peep-proof display |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN217739660U (en) |
| TW (1) | TWM633484U (en) |
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2022
- 2022-07-05 TW TW111207159U patent/TWM633484U/en unknown
- 2022-07-21 CN CN202221910831.9U patent/CN217739660U/en active Active
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| TWM633484U (en) | 2022-10-21 |
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