Peep-proof panel, display device and display equipment

Abstract

The invention discloses a peep-proof panel, a display device and display equipment, and mainly relates to the technical field of display, the peep-proof panel is used in the display device, and the display panel comprises a plurality of pixel units; the peep-proof panel comprises a peep-proof substrate, a piezoelectric driving layer and a birefringence cancellation retaining wall, the piezoelectric driving layer and the birefringence cancellation retaining wall are both arranged on the peep-proof substrate, and the birefringence cancellation retaining wall is located between every two adjacent pixel units; the birefringence cancellation retaining wall comprises a polaroid and at least one set of deformation pressure applying unit and pressed wall, the deformation pressure applying unit is arranged at the top and / or the bottom of the pressed wall, the polaroid is arranged on one side of the pressed wall, the deformation pressure applying unit is connected with the piezoelectric driving layer, and the piezoelectric driving layer drives the deformation pressure applying unit to generate deformation to extrude the pressed wall. Through the design, the peep-proof panel can selectively reduce the transmittance of the light at the preset angle, and the display device can be switched between the peep-proof mode and the sharing mode.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a privacy panel, display device, and display equipment. Background Technology

[0002] Privacy protection features can prevent others from peeping at the content being read or sensitive notifications. For example, when e-paper display devices are used in public places, privacy-protected e-paper display devices limit the viewing angle to within ±30° to protect user privacy and prevent third-party peeping.

[0003] However, the privacy protection function of traditional display devices is currently fixed, and it is not possible to switch between sharing mode and privacy protection mode. Summary of the Invention

[0004] The purpose of this application is to provide a privacy panel, display device, and display equipment, which allows the privacy panel to selectively reduce the light transmittance at a preset angle, enabling the display device to switch between privacy mode and sharing mode.

[0005] This application discloses a privacy panel used in a display device. The display device includes a display panel, which includes a plurality of pixel units. The privacy panel includes a privacy substrate, a piezoelectric driving layer, and a birefringence phase cancellation barrier. The piezoelectric driving layer and the birefringence phase cancellation barrier are both disposed on the privacy substrate, and the birefringence phase cancellation barrier is located between two adjacent pixel units. The birefringent phase-canceling barrier includes a polarizer and at least one set of deformation-applying pressure units and a pressure-bearing wall. The deformation-applying pressure units are disposed at the top and / or bottom of the pressure-bearing wall, and the polarizer is disposed on one side of the pressure-bearing wall. The deformation-applying pressure units are connected to the piezoelectric driving layer, and the piezoelectric driving layer drives the deformation-applying pressure units to deform and compress the pressure-bearing wall.

[0006] Optionally, the deformation pressure unit includes an anode, a piezoelectric ceramic, and a cathode, with the anode and the cathode respectively connected to both ends of the piezoelectric ceramic, and the material of the pressure-bearing wall includes polymethyl methacrylate.

[0007] Optionally, the birefringent phase-destructive barrier includes two sets of deformation-applying pressure units and pressure-receiving walls. One set is defined as a first deformation-applying pressure unit and a first pressure-receiving wall, and the other set is defined as a second deformation-applying pressure unit and a second pressure-receiving wall. The first deformation-applying pressure unit squeezes the first pressure-receiving wall, and the second deformation-applying pressure unit squeezes the second pressure-receiving wall. The polarizer is disposed between the first pressure-receiving wall and the second pressure-receiving wall, and the two sets of deformation-applying pressure units and pressure-receiving walls are located between two adjacent pixel units.

[0008] Optionally, the birefringence destructive barrier further includes a spacer barrier located between the first pressure wall and the second pressure wall.

[0009] Optionally, the first deformation pressure unit is located at the top of the first pressure-bearing wall, and the second deformation pressure unit is located at the bottom of the second pressure-bearing wall.

[0010] Optionally, two adjacent pixel units can be used to display different colors; The birefringent phase cancellation barrier includes six sets of deformation-applying pressure units and pressure-receiving walls, respectively defined as a first deformation-applying pressure unit and a first pressure-receiving wall, a second deformation-applying pressure unit and a second pressure-receiving wall, a third deformation-applying pressure unit and a third pressure-receiving wall, a fourth deformation-applying pressure unit and a fourth pressure-receiving wall, a fifth deformation-applying pressure unit and a fifth pressure-receiving wall, and a sixth deformation-applying pressure unit and a sixth pressure-receiving wall; the six sets of deformation-applying pressure units and pressure-receiving walls are located between two adjacent pixel units; The first deformation pressure unit squeezes the first pressure-bearing wall, the second deformation pressure unit squeezes the second pressure-bearing wall, the third deformation pressure unit squeezes the third pressure-bearing wall, the fourth deformation pressure unit squeezes the fourth pressure-bearing wall, the fifth deformation pressure unit squeezes the fifth pressure-bearing wall, and the sixth deformation pressure unit squeezes the sixth pressure-bearing wall. Furthermore, the first pressure-bearing wall, the second pressure-bearing wall, the third pressure-bearing wall, the fourth pressure-bearing wall, the fifth pressure-bearing wall, and the sixth pressure-bearing wall are arranged in sequence, and polarizers are arranged between the first pressure-bearing wall and the second pressure-bearing wall, the second pressure-bearing wall and the third pressure-bearing wall, the third pressure-bearing wall and the fourth pressure-bearing wall, the fourth pressure-bearing wall and the fifth pressure-bearing wall, and the fifth pressure-bearing wall and the sixth pressure-bearing wall.

[0011] Optionally, the number of deformation pressure units includes two, with the two deformation pressure units located at the top and bottom of the pressure-bearing wall, respectively.

[0012] This application also discloses a display device, characterized in that the display device includes a display panel and a privacy panel, the privacy panel being disposed on one side of the light-emitting surface of the display panel.

[0013] Optionally, the multiple pixel units are defined as a first pixel unit, a second pixel unit, and a third pixel unit, respectively, wherein the first pixel unit is used to display red pixels, the second pixel unit is used to display green pixels, and the third pixel unit is used to display blue pixels; The birefringent phase-canceling barrier includes a polarizer and two sets of deformation-applying pressure units and pressure-receiving walls. One set is defined as a first deformation-applying pressure unit and a first pressure-receiving wall, and the other set is defined as a second deformation-applying pressure unit and a second pressure-receiving wall. The first deformation-applying pressure unit compresses the first pressure-receiving wall, and the second deformation-applying pressure unit compresses the second pressure-receiving wall. The polarizer is disposed between the first pressure-receiving wall and the second pressure-receiving wall, and the two sets of deformation-applying pressure units and pressure-receiving walls are located between two adjacent pixel units. Between the first pixel unit and the second pixel unit, the first pressure-bearing wall is close to the first pixel unit, and the second pressure-bearing wall is close to the second pixel unit; between the second pixel unit and the third pixel unit, the first pressure-bearing wall is close to the second pixel unit, and the second pressure-bearing wall is close to the third pixel unit; between the third pixel unit and the first pixel unit, the first pressure-bearing wall is close to the third pixel unit, and the second pressure-bearing wall is close to the first pixel unit.

[0014] This application also discloses a display device, which includes a driving circuit and a display apparatus. The display apparatus includes a display panel and a privacy panel, and the driving circuit is connected to the display panel and the privacy panel.

[0015] Compared to existing privacy panels that use fixed gratings, this application uses a birefringence destructive barrier. This barrier includes at least one set of deformation-applying pressure units and a pressure-receiving wall. The deformation-applying pressure units are connected to the piezoelectric driving layer, which drives them to deform, thus compressing the pressure-receiving wall. The pressure-receiving wall undergoes birefringence, and the birefringed light, after passing through a polarizer, can produce destructive interference. This allows light at a preset angle to selectively weaken or even eliminate the intensity of light at that preset angle, thereby reducing the light transmittance at that angle. Furthermore, when the privacy panel is used within a display device, it allows the display device to switch between sharing mode and privacy mode. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of a display device according to an embodiment of this application; Figure 2This is a schematic diagram of a display device according to an embodiment of this application; Figure 3 This is a schematic diagram of a privacy panel disposed on a display panel according to an embodiment of this application; Figure 4 This is a schematic diagram of a birefringence phase-depletion barrier according to an embodiment of this application; Figure 5 This is a schematic diagram of an embodiment of the present application including two deformation pressure units; Figure 6 This is a schematic diagram of two sets of deformation-applying pressure units and a pressure-bearing wall according to an embodiment of this application. Figure 7 This is a schematic diagram of an embodiment of the present application, including six sets of deformation pressure applying units and the deformation pressure applying units; Figure 8 This is an enlarged schematic diagram of an embodiment of the present application, including six sets of deformation pressure units and the deformation pressure units; Figure 9 This is a schematic diagram of a display device according to an embodiment of this application.

[0017] Among them, 10 is a display device; 20 is a driving circuit; 30 is a display unit; 40 is a display panel; 50 is a privacy panel; 100 is a privacy substrate; 110 is a piezoelectric driving layer; 200 is a birefringent destructive barrier; 210 is a deformation pressure unit; 211 is an anode; 212 is a piezoelectric ceramic; 213 is a cathode; 220 is a pressure-bearing wall; 230 is a spacer barrier; 240 is a polarizer; 311 is a first deformation pressure unit; 312 is a first pressure-bearing wall; 321 is a second deformation pressure unit; 322 is a second pressure-bearing wall; 331 is a third deformation pressure unit; 332 is a third pressure-bearing wall; 341 is a fourth deformation pressure unit; 342 is a fourth pressure-bearing wall; 351 is a fifth deformation pressure unit; 352 is a fifth pressure-bearing wall; 361 is a sixth deformation pressure unit; and 362 is a sixth pressure-bearing wall. 400, Pixel unit; 410, First pixel unit; 420, Second pixel unit; 430, Third pixel unit; 500, Array substrate; 510, Electronic paper film; 511, White electrophoretic particles; 512, Black electrophoretic particles; 520, Color resist layer; 521, Red color resist; 522, Green color resist; 523, Blue color resist. Detailed Implementation

[0018] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0020] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0023] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 1 As shown, this application discloses a display device 10, which includes a driving circuit 20 and a display device 30. The display device 30 includes a display panel 40 and a privacy panel 50, and the driving circuit 20 is connected to the display panel 40 and the privacy panel 50.

[0024] The driving circuit 20 drives the display panel 40 to display images. The driving circuit 20 also drives the privacy panel 50 to selectively block light, so that the display device 10 switches between privacy mode and sharing mode.

[0025] Figure 2 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 2As shown, this application also discloses a display device 30, which includes a display panel 40 and a privacy panel 50. The privacy panel 50 is disposed on one side of the light-emitting surface of the display panel 40. The privacy panel 50 can control the transmission or non-transmission of large-angle light on one side of the light-emitting surface of the display panel 40, thereby enabling the display device 30 to switch between sharing mode and privacy mode.

[0026] The display panel 40 includes, for example, a TN (Twisted Nematic) display panel 40, an IPS (In-Plane Switching) display panel 40, a VA (Vertical Alignment) display panel 40, an MVA (Multi-Domain Vertical Alignment) display panel 40, or other types of display panels 40, such as an OLED (Organic Light-Emitting Diode) display panel 40.

[0027] This application mainly improves the privacy panel 50, which can be used in the aforementioned display device 30. Regarding the privacy panel 50, this application provides the following design: Figure 3 This is a schematic diagram illustrating an embodiment of the privacy panel disposed on a display panel according to this application. Figure 4 This is a schematic diagram of a birefringence destructive barrier according to an embodiment of this application, as shown below. Figures 3-4 As shown, this application discloses a privacy panel 50, which is used in a display device 30. The display device 30 includes a display panel 40, which includes a plurality of pixel units 400.

[0028] The privacy panel 50 includes a privacy substrate 100, a piezoelectric driving layer 110, and a birefringence phase cancellation barrier 200. The piezoelectric driving layer 110 and the birefringence phase cancellation barrier 200 are both disposed on the privacy substrate 100, and the birefringence phase cancellation barrier 200 is located between two adjacent pixel units 400.

[0029] It is understandable that birefringence cancellation barriers 200 may be provided between all two adjacent pixel units 400; of course, it may also be that birefringence cancellation barriers 200 are provided between some two adjacent pixel units 400.

[0030] For example, birefringence cancellation barriers 200 can be provided only in the vertical direction between two adjacent columns of pixel units 400 to satisfy the privacy mode function for left and right viewing angles.

[0031] For example, birefringence cancellation barriers 200 can be provided only in the horizontal direction between two adjacent rows of pixel units 400 to satisfy the privacy mode function for both vertical and horizontal viewing angles.

[0032] Furthermore, the birefringence cancellation barrier 200 is entirely located within the orthographic projection above one of the two adjacent pixel units 400; the birefringence cancellation barrier 200 may also be partially located within the orthographic projection above one of the two adjacent pixel units 400; the birefringence cancellation barrier 200 may also be entirely located in the gap between two adjacent pixel units 400, not in the orthographic projection above any pixel unit 400; all of these should be considered as the birefringence cancellation barrier 200 being located between two adjacent pixel units 400.

[0033] The birefringent phase-canceling barrier 200 includes a polarizer 240 and at least one set of deformation-applying pressure units 210 and a pressure-bearing wall 220. The deformation-applying pressure units 210 are disposed on the top and / or bottom of the pressure-bearing wall 220, and the polarizer 240 is disposed on one side of the pressure-bearing wall 220. The deformation-applying pressure units 210 are connected to the piezoelectric driving layer 110, and the piezoelectric driving layer 110 drives the deformation-applying pressure units 210 to deform, thereby compressing the pressure-bearing wall 220.

[0034] For example, the polarizer 240 may be disposed on only one side of the pressure wall 220, or it may be disposed on both the pressure wall 220 and the deformation pressure unit 210.

[0035] The deformation pressure unit 210 is disposed at the top and / or bottom of the pressure wall 220. In other words, the deformation pressure unit 210 may be disposed only at the top of the pressure wall 220; the deformation pressure unit 210 may be disposed only at the bottom of the pressure wall 220; or the deformation pressure unit 210 may be disposed at both the bottom and the top of the pressure wall 220.

[0036] The deformation pressure unit 210 can generate deformation. When the piezoelectric driving layer 110 drives the deformation pressure unit 210 to generate deformation and squeeze the pressure wall 220, the molecular structure of the pressure wall 220 undergoes elastic deformation, causing the dielectric constant tensor to change from isotropic to anisotropic atomic arrangement. This gives the pressure wall 220 birefringence. When combined with the polarizer 240, light rays at a predetermined angle can pass through the pressure wall 220 and the polarizer 240 and then undergo interference cancellation, thereby weakening or even eliminating light rays at the predetermined angle.

[0037] When the piezoelectric driving layer 110 does not drive the deformation pressure unit 210 to deform and does not compress the pressure wall 220, light can pass smoothly through the pressure wall 220; thus realizing the switching between the privacy mode and the sharing mode.

[0038] For example, this application takes the deformation pressure unit 210 as including an anode 211, a piezoelectric ceramic 212 and a cathode 213, wherein the anode 211 and the cathode 213 are respectively connected to the two ends of the piezoelectric ceramic 212, and the material of the pressure wall 220 includes polymethyl methacrylate.

[0039] The piezoelectric ceramic 212 will change in volume after an input voltage is applied. Therefore, applying a preset voltage to the anode 211 and the cathode 213 can cause the piezoelectric ceramic 212 to deform. After the piezoelectric ceramic 212 deforms, it compresses the pressure wall 220, causing the molecular structure of the pressure wall 220 to undergo elastic deformation, resulting in a change in the dielectric constant tensor. The atomic arrangement changes from isotropic to anisotropic, thus exhibiting birefringence.

[0040] See Figure 4 For example, when a beam of light at angle θ shines on the pressure wall 220, it will refract into o-rays and e-rays due to birefringence. The e-ray has a lower propagation speed, while the o-ray has a higher propagation speed. Moreover, the refraction angles of the e-ray and o-ray are relatively similar, so their propagation distances in the pressure wall 220 are approximately equal. The deformation of the piezoelectric ceramic 212 is ΔL. The relationship between ΔL and the voltage difference between the anode 211 and the cathode 213 is: ΔL = V * d33, where d33 is the piezoelectric constant and V is the voltage difference between the anode 211 and the cathode 213.

[0041] The strain of the compression wall 220 is ε = ΔL / L, where L is the height of the compression wall 220; the internal stress of the compression wall 220 is σ = E*ε, where E is the Young's modulus of the material of the compression wall 220.

[0042] Since the propagation speed of e-rays and o-rays is different, there will be an optical path difference between e-rays and o-rays. The optical path difference between e-rays and o-rays is δ=C*t*σ, where t can be approximated by the distance that e-rays or o-rays pass through the pressure wall 220, and C is the photoelastic coefficient, which is a fixed value. Taking the angle of the light source at a preset angle as θ as an example, θ is the angle between the light source and the light-emitting surface of the display panel 40.

[0043] The refraction angles of e-rays and o-rays are not significantly different, so the distance t that the e-ray passes through within the pressure wall 220 is approximately d / sinθ, where d is the thickness of the pressure wall 220.

[0044] Substituting into the formula δ=C*t*σ=C*(d / sinθ)*E*V*d33 / L, we can see that if the optical path difference is determined, the voltage V and the incident angle θ in the above formula are variables. Therefore, by controlling the variable voltage V, we can control the optical path difference between the o-ray and e-ray refracted at the corresponding incident angle θ, thus making the o-ray and e-ray have a destructive optical path difference.

[0045] However, since the polarization directions of the o-ray and e-ray coming out of the pressure wall 220 are perpendicular to each other, after the perpendicular o-ray and e-ray irradiate the polarizer 240, they are decomposed into components perpendicular to the polarizer 240 and components parallel to the polarizer 240. The components perpendicular to the polarizer 240 cannot pass through, while the optical path difference between the o-ray and e-ray components of the parallel polarizer 240 can be canceled by interference, thereby reducing the light transmittance at angle θ and thus achieving the privacy protection effect.

[0046] Compared to existing privacy panels that use fixed gratings, this application uses a birefringence destructive barrier 200. The birefringence destructive barrier 200 includes at least one set of deformation pressure units 210 and a pressure-bearing wall 220. The deformation pressure units 210 are connected to the piezoelectric driving layer 110, which drives the deformation pressure units 210 to deform, thereby compressing the pressure-bearing wall 220. This causes birefringence in the pressure-bearing wall 220. The birefringed light rays, after passing through the polarizer 240, can produce destructive interference. This allows light rays at a preset angle to produce destructive interference after birefringence, enabling the privacy panel 50 to selectively weaken or even eliminate the light intensity at the preset angle, thereby reducing the light transmittance at that angle. Furthermore, when the privacy panel 50 is used within the display device 30, the display device 30 can switch between a sharing mode and a privacy mode.

[0047] For ease of explanation, this application takes an electronic paper type display panel 40 as an example.

[0048] The display panel 40 includes an array substrate 500, an electronic paper film 510, and a color resist layer 520. The electronic paper film 510 and the color resist layer 520 are sequentially disposed on the array substrate 500. The electronic paper film 510 includes white electrophoretic particles 511 and black electrophoretic particles 512. The color resist layer 520 includes red color resist 521, green color resist 522, and blue color resist 523. The red color resist 521, green color resist 522, and blue color resist 523 are located in different pixel units 400.

[0049] Figure 5 This is a schematic diagram of an embodiment of this application including two deformation pressure applying units, as shown below. Figure 5As shown, the number of deformation pressure application units 210 includes two, and the two deformation pressure application units 210 are located at the top and bottom of the pressure wall 220, respectively.

[0050] In simple terms, by setting deformation pressure units 210 at both the top and bottom of the pressure wall 220, the pressure wall 220 can be squeezed from both ends simultaneously, making the deformation of the pressure wall 220 more uniform and thus improving the accuracy of the pressure wall 220 in achieving the cancellation of light interference at a preset angle.

[0051] When deformation pressure units 210 are provided at both the top and bottom of the pressure wall 220, the anodes 211 of the deformation pressure units 210 at the top and bottom of the pressure wall 220 can be connected by connecting metal wires, and the cathodes 213 of the deformation pressure units 210 at the top and bottom of the pressure wall 220 can be connected by connecting metal wires.

[0052] Alternatively, the piezoelectric drive layer 110 can be provided on both the upper and lower sides of the pressure wall 220.

[0053] When the electronic paper type display panel 40 displays only a black and white image, the number of the deformation pressure unit 210 and the pressure wall 220 can be only one set, and one set of deformation pressure unit 210 and pressure wall 220 can satisfy the elimination or reduction of the emitted light from the left and right pixel units 400 at a preset angle.

[0054] Figure 6 This is a schematic diagram of two sets of deformation-applying pressure units and a pressure-bearing wall according to an embodiment of this application, as shown below. Figure 6 As shown, the birefringent phase-canceling barrier 200 includes a polarizer 240 and two sets of deformation pressure units 210 and pressure-bearing walls 220. One set is defined as a first deformation pressure unit 311 and a first pressure-bearing wall 312, and the other set is defined as a second deformation pressure unit 321 and a second pressure-bearing wall 322.

[0055] The first deformation pressure unit 311 presses against the first pressure-bearing wall 312, and the second deformation pressure unit 321 presses against the second pressure-bearing wall 322. That is, the first deformation pressure unit 311 is located at the top and / or bottom of the first pressure-bearing wall 312, and the second deformation pressure unit 321 is located at the top and / or bottom of the second pressure-bearing wall 322. The two sets of deformation pressure units 210 and the pressure-bearing wall 220 are located between two adjacent pixel units 400. The height of the polarizer 240 is equal to the sum of the heights of the first pressure-bearing wall 312 and the first deformation pressure unit 311, so that the polarizer 240 is completely located on one side of the first pressure-bearing wall 312 and the first deformation pressure unit 311.

[0056] By setting two sets of deformation pressure units 210 and pressure-receiving walls 220 between two adjacent pixel units 400, when the privacy panel 50 is used for displaying only black and white images, different voltages can be applied to the first deformation pressure unit 311 and the second deformation pressure unit 321, so that one set of the first deformation pressure unit 311 and the first pressure-receiving wall 312 and another set of the second deformation pressure unit 321 and the second pressure-receiving wall 322 can simultaneously interfere and cancel out the light emitted from the left and right pixel units 400 at different preset angles.

[0057] Of course, it is also possible that when the privacy panel 50 is used to display the color image on the display panel 40, by applying different voltages to the first deformation pressure unit 311 and the second deformation pressure unit 321, a set of the first deformation pressure unit 311 and the first pressure-bearing wall 312 and another set of the second deformation pressure unit 321 and the second pressure-bearing wall 322 are respectively used to interfere and cancel out the light emitted from the left and right pixel units 400 at the same preset angle.

[0058] When two or more sets of deformation pressure units 210 and pressure walls 220 are set, the birefringence phase cancellation barrier 200 also includes a spacer barrier 230, which is located between two adjacent pressure walls 220, that is, the spacer barrier 230 is located between the first pressure wall 312 and the second pressure wall 322.

[0059] In simple terms, by adding a partition wall 230 between the first pressure wall 312 and the second pressure wall 322, the influence between the deformation of the first pressure wall 312 and the deformation of the second pressure wall 322 can be reduced. The material of the partition wall 230 can also be polymethyl methacrylate.

[0060] For example, the partition wall 230 may not be provided between the first deformation pressure unit 311 and the second deformation pressure unit 321, so that the lateral deformation of the first deformation pressure unit 311 and the second deformation pressure unit 321 will not be transmitted.

[0061] For example, the first deformation pressure unit 311 and the second deformation pressure unit 321 can be disposed on the same side of the first pressure wall 312 and the second pressure wall 322, thereby reducing the manufacturing difficulty.

[0062] For example, the first deformation pressure unit 311 and the second deformation pressure unit 321 are respectively located on different sides of the first pressure wall 312 and the second pressure wall 322. Specifically, the first deformation pressure unit 311 is located at the top of the first pressure wall 312, and the second deformation pressure unit 321 is located at the bottom of the second pressure wall 322.

[0063] In simple terms, by increasing the distance between the first deformation pressure unit 311 and the second deformation pressure unit 321, the mutual influence between the first deformation pressure unit 311 and the second deformation pressure unit 321 during deformation is further reduced.

[0064] Figure 7 This is a schematic diagram of an embodiment of the present application, including six sets of deformation pressure applying units and the deformation pressure applying units. Figure 8 This is an enlarged schematic diagram of an embodiment of this application, including six sets of deformation pressure applying units and the deformation pressure applying units, as shown below. Figures 7-8 As shown, two adjacent pixel units 400 are used to display different colors.

[0065] The birefringent phase-canceling barrier 200 includes six sets of deformation-applying pressure units 210 and pressure-receiving walls 220, respectively defined as a first deformation-applying pressure unit 311 and a first pressure-receiving wall 312, a second deformation-applying pressure unit 321 and a second pressure-receiving wall 322, a third deformation-applying pressure unit 331 and a third pressure-receiving wall 332, a fourth deformation-applying pressure unit 341 and a fourth pressure-receiving wall 342, a fifth deformation-applying pressure unit 351 and a fifth pressure-receiving wall 352, and a sixth deformation-applying pressure unit 361 and a sixth pressure-receiving wall 362; the six sets of deformation-applying pressure units 210 and pressure-receiving walls 220 are located between two adjacent pixel units 400.

[0066] The first deformation pressure unit 311 presses the first pressure-bearing wall 312, the second deformation pressure unit 321 presses the second pressure-bearing wall 322, the third deformation pressure unit 331 presses the third pressure-bearing wall 332, the fourth deformation pressure unit 341 presses the fourth pressure-bearing wall 342, the fifth deformation pressure unit 351 presses the fifth pressure-bearing wall 352, and the sixth deformation pressure unit 361 presses the sixth pressure-bearing wall 362.

[0067] Furthermore, the first pressure-bearing wall 312, the second pressure-bearing wall 322, the third pressure-bearing wall 332, the fourth pressure-bearing wall 342, the fifth pressure-bearing wall 352, and the sixth pressure-bearing wall 362 are arranged sequentially, and a polarizer 240 is provided between the first pressure-bearing wall 312 and the second pressure-bearing wall 322, the second pressure-bearing wall 322 and the third pressure-bearing wall 332, the third pressure-bearing wall 332 and the fourth pressure-bearing wall 342, the fourth pressure-bearing wall 342 and the fifth pressure-bearing wall 352, and the fifth pressure-bearing wall 352 and the sixth pressure-bearing wall 362.

[0068] Taking two adjacent pixel units 400 as examples of displaying red and green respectively, the first deformation pressure unit 311 and the first pressure-bearing wall 312, the second deformation pressure unit 321 and the second pressure-bearing wall 322, the third deformation pressure unit 331 and the third pressure-bearing wall 332 are close to the pixel unit 400 displaying red, and the fourth deformation pressure unit 341 and the fourth pressure-bearing wall 342, the fifth deformation pressure unit 351 and the fifth pressure-bearing wall 352, and the sixth deformation pressure unit 361 and the sixth pressure-bearing wall 362 are close to the pixel unit 400 displaying green.

[0069] When the image is displayed, the first deformation pressure unit 311 and the first pressure-bearing wall 312, the second deformation pressure unit 321 and the second pressure-bearing wall 322, the third deformation pressure unit 331 and the third pressure-bearing wall 332 are used to interfere and cancel out the light from different angles coming out of the red pixel unit 400.

[0070] The fourth deformation pressure unit 341 and the fourth pressure-receiving wall 342, the fifth deformation pressure unit 351 and the fifth pressure-receiving wall 352, and the sixth deformation pressure unit 361 and the sixth pressure-receiving wall 362 are respectively used to interfere and cancel out light rays from different angles emitted from the green pixel unit 400. This improves the privacy protection effect of the color display panel 40.

[0071] For example, the first deformation pressure unit 311 is located at the top of the first pressure-bearing wall 312; the second deformation pressure unit 321 is located at the bottom of the second pressure-bearing wall 322; the third deformation pressure unit 331 is located at the top of the third pressure-bearing wall 332; the fourth deformation pressure unit 341 is located at the bottom of the fourth pressure-bearing wall 342; the fifth deformation pressure unit 351 is located at the top of the fifth pressure-bearing wall 352; and the sixth deformation pressure unit 361 is located at the bottom of the sixth pressure-bearing wall 362.

[0072] Furthermore, a partition wall 230 is provided between each adjacent pair of the first pressure wall 312, the second pressure wall 322, the third pressure wall 332, the fourth pressure wall 342, the fifth pressure wall 352, and the sixth pressure wall 362.

[0073] For example, to make the light rays emitted from the red pixel unit 400 at an angle of 30° to the light-emitting surface cancel each other out, C = 8.5 × 10 - ¹²m² / N, wall thickness d=0.005mm, θ=30°, E=3GPa, d33=190M / V, L=0.1mm; red light half wavelength 250nm.

[0074] Substituting into the formula n*250*10 -9 =8.5×10 - ¹²*(0.005*10 -3 / sin30°)*3*10 9 *V*190 / (0.1*10 -3 Simplified: n≈839178.6×V, where V takes values ​​from 0 to 5V and n takes an odd number. At this time, the two beams of light produced by the birefringence of 30° can interfere destructively. For example, when V=3, the corresponding n=2517535 (odd number).

[0075] The first pressure-bearing wall 312 and the sixth pressure-bearing wall 362 are used to interfere and cancel out light within a first preset angle range, the second pressure-bearing wall 322 and the fifth pressure-bearing wall 352 are used to interfere and cancel out light within a second preset angle range, and the third pressure-bearing wall 332 and the fourth pressure-bearing wall 342 are used to interfere and cancel out light within a third preset angle range. Here, the angle of the light is the angle between the light and the light-emitting surface of the display panel 40, wherein the angle within the first preset angle range, the angle within the second preset angle range, and the angle within the third preset angle range decrease sequentially.

[0076] For example, the first pressure-bearing wall 312 and the sixth pressure-bearing wall 362 are used to interfere with light rays that are destructively opposed by 30°, the second pressure-bearing wall 322 and the fifth pressure-bearing wall 352 are used to interfere with light rays that are destructively opposed by 20°, and the third pressure-bearing wall 332 and the fourth pressure-bearing wall 342 are used to interfere with light rays that are destructively opposed by 10°. Therefore, it is not necessary to set the height of the first pressure-bearing wall 312, the sixth pressure-bearing wall 362, the second pressure-bearing wall 322, the fifth pressure-bearing wall 352, the third pressure-bearing wall 332, and the fourth pressure-bearing wall 342 to be very high. This allows for a reduction in the thickness of the display device 30.

[0077] Figure 9 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 9 As shown, for example, the plurality of pixel units 400 are respectively defined as a first pixel unit 410, a second pixel unit 420 and a third pixel unit 430, wherein the first pixel unit 410 is used to display red pixels, the second pixel unit 420 is used to display green pixels and the third pixel unit 430 is used to display blue pixels.

[0078] The birefringent destructive barrier 200 includes a polarizer 240, two sets of deformation pressure units 210, and a pressure-bearing wall 220. One set is defined as a first deformation pressure unit 311 and a first pressure-bearing wall 312, and the other set is defined as a second deformation pressure unit 321 and a second pressure-bearing wall 322. The first deformation pressure unit 311 presses the first pressure-bearing wall 312, and the second deformation pressure unit 321 presses the second pressure-bearing wall 322. The polarizer 240 is disposed between the first pressure-bearing wall 312 and the second pressure-bearing wall 322. The two sets of deformation pressure units 210 and pressure-bearing walls 220 are located between two adjacent pixel units 400.

[0079] Between the first pixel unit 410 and the second pixel unit 420, the first pressure-bearing wall 312 is close to the first pixel unit 410, and the second pressure-bearing wall 322 is close to the second pixel unit 420; between the second pixel unit 420 and the third pixel unit 430, the first pressure-bearing wall 312 is close to the second pixel unit 420, and the second pressure-bearing wall 322 is close to the third pixel unit 430; between the third pixel unit 430 and the first pixel unit 410, the first pressure-bearing wall 312 is close to the third pixel unit 430, and the second pressure-bearing wall 322 is close to the first pixel unit 410.

[0080] Between the first pixel unit 410 and the second pixel unit 420, the first pressure wall 312 is used to interfere and cancel out light rays from the first pixel unit 410 at a preset angle; the second pressure wall 322 is used to interfere and cancel out light rays from the second pixel unit 420 at a preset angle.

[0081] Between the second pixel unit 420 and the third pixel unit 430, the first pressure wall 312 is used to interfere and cancel out light rays from the second pixel unit 420 at a preset angle; the second pressure wall 322 is used to interfere and cancel out light rays from the third pixel unit 430 at a preset angle.

[0082] Between the third pixel unit 430 and the first pixel unit 410, the first pressure-bearing wall 312 is used to interfere and cancel out light rays emanating from the third pixel unit 430 at a preset angle; the second pressure-bearing wall 322 is used to interfere and cancel out light rays emanating from the first pixel unit 410 at a preset angle. This improves the privacy protection effect of the color display panel 40.

[0083] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0084] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0085] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A privacy panel, characterized in that, The privacy panel is used in a display device, the display device includes a display panel, the display panel includes a plurality of pixel units; the privacy panel includes a privacy substrate, a piezoelectric driving layer and a birefringent phase cancellation barrier, the piezoelectric driving layer and the birefringent phase cancellation barrier are both disposed on the privacy substrate, and the birefringent phase cancellation barrier is located between two adjacent pixel units; The birefringent phase-canceling barrier includes a polarizer and at least one set of deformation-applying pressure units and a pressure-bearing wall. The deformation-applying pressure units are disposed at the top and / or bottom of the pressure-bearing wall, and the polarizer is disposed on one side of the pressure-bearing wall. The deformation-applying pressure units are connected to the piezoelectric driving layer, and the piezoelectric driving layer drives the deformation-applying pressure units to deform and compress the pressure-bearing wall.

2. The privacy panel according to claim 1, characterized in that, The deformation pressure unit includes an anode, a piezoelectric ceramic, and a cathode. The anode and the cathode are respectively connected to the two ends of the piezoelectric ceramic, and the material of the pressure-bearing wall includes polymethyl methacrylate.

3. The privacy panel according to claim 1, characterized in that, The birefringent phase-destruction barrier includes two sets of deformation-applying pressure units and pressure-receiving walls. One set is defined as a first deformation-applying pressure unit and a first pressure-receiving wall, and the other set is defined as a second deformation-applying pressure unit and a second pressure-receiving wall. The first deformation-applying pressure unit squeezes the first pressure-receiving wall, and the second deformation-applying pressure unit squeezes the second pressure-receiving wall. The polarizer is disposed between the first pressure-receiving wall and the second pressure-receiving wall. The two sets of deformation-applying pressure units and pressure-receiving walls are located between two adjacent pixel units.

4. The privacy panel according to claim 3, characterized in that, The birefringence phase-depletion barrier also includes a spacer barrier, which is located between the first pressure wall and the second pressure wall.

5. The privacy panel according to claim 4, characterized in that, The first deformation pressure unit is located at the top of the first pressure-bearing wall, and the second deformation pressure unit is located at the bottom of the second pressure-bearing wall.

6. The privacy panel according to claim 1, characterized in that, Two adjacent pixel units are used to display different colors; The birefringence phase cancellation barrier includes six sets of deformation pressure-applying units and pressure-receiving walls, which are respectively defined as the first deformation pressure-applying unit and the first pressure-receiving wall, the second deformation pressure-applying unit and the second pressure-receiving wall, the third deformation pressure-applying unit and the third pressure-receiving wall, the fourth deformation pressure-applying unit and the fourth pressure-receiving wall, the fifth deformation pressure-applying unit and the fifth pressure-receiving wall, and the sixth deformation pressure-applying unit and the sixth pressure-receiving wall. The six sets of deformation pressure-applying units and the pressure-receiving walls are located between two adjacent pixel units; The first deformation pressure unit squeezes the first pressure-bearing wall, the second deformation pressure unit squeezes the second pressure-bearing wall, the third deformation pressure unit squeezes the third pressure-bearing wall, the fourth deformation pressure unit squeezes the fourth pressure-bearing wall, the fifth deformation pressure unit squeezes the fifth pressure-bearing wall, and the sixth deformation pressure unit squeezes the sixth pressure-bearing wall. Furthermore, the first pressure-bearing wall, the second pressure-bearing wall, the third pressure-bearing wall, the fourth pressure-bearing wall, the fifth pressure-bearing wall, and the sixth pressure-bearing wall are arranged in sequence, and polarizers are arranged between the first pressure-bearing wall and the second pressure-bearing wall, the second pressure-bearing wall and the third pressure-bearing wall, the third pressure-bearing wall and the fourth pressure-bearing wall, the fourth pressure-bearing wall and the fifth pressure-bearing wall, and the fifth pressure-bearing wall and the sixth pressure-bearing wall.

7. The privacy panel according to claim 1, characterized in that, The number of deformation pressure application units includes two, and the two deformation pressure application units are located at the top and bottom of the pressure-bearing wall, respectively.

8. A display device, characterized in that, The display device includes a display panel and a privacy panel as described in any one of claims 1-7, wherein the privacy panel is disposed on one side of the light-emitting surface of the display panel.

9. The display device according to claim 8, characterized in that, Multiple pixel units are defined as a first pixel unit, a second pixel unit, and a third pixel unit, respectively. The first pixel unit is used to display red pixels, the second pixel unit is used to display green pixels, and the third pixel unit is used to display blue pixels. The birefringent phase-canceling barrier includes a polarizer and two sets of deformation-applying pressure units and pressure-receiving walls. One set is defined as a first deformation-applying pressure unit and a first pressure-receiving wall, and the other set is defined as a second deformation-applying pressure unit and a second pressure-receiving wall. The first deformation-applying pressure unit compresses the first pressure-receiving wall, and the second deformation-applying pressure unit compresses the second pressure-receiving wall. The polarizer is disposed between the first pressure-receiving wall and the second pressure-receiving wall, and the two sets of deformation-applying pressure units and pressure-receiving walls are located between two adjacent pixel units. Between the first pixel unit and the second pixel unit, the first pressure-bearing wall is closer to the first pixel unit, and the second pressure-bearing wall is closer to the second pixel unit; Between the second pixel unit and the third pixel unit, the first pressure-bearing wall is closer to the second pixel unit, and the second pressure-bearing wall is closer to the third pixel unit; Between the third pixel unit and the first pixel unit, the first pressure-bearing wall is closer to the third pixel unit, and the second pressure-bearing wall is closer to the first pixel unit.

10. A display device, characterized in that, The display device includes a driving circuit and a display apparatus as described in any one of claims 8-9, the display apparatus including a display panel and a privacy panel, and the driving circuit being connected to the display panel and the privacy panel.

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