Viewing angle adjusting panel, viewing angle adjusting method and display device

Abstract

The invention provides a visual angle adjusting panel, a visual angle adjusting method and a display device.The visual angle adjusting panel is stacked on a display panel and comprises a first substrate, a light transmitting layer, a second substrate, a first electrode layer, a second electrode layer, a liquid crystal layer, a fourth electrode layer, a third electrode layer and a third substrate which are sequentially stacked; the first electrode layer comprises a plurality of first electrodes, the third electrode layer comprises a plurality of third electrodes, the first electrodes and the third electrodes are arranged in a staggered mode, and the first electrode layer, the second electrode layer, the third electrode layer and the fourth electrode layer drive dye liquid crystals at different positions of the liquid crystal layer to deflect when receiving bias voltage of the corresponding magnitude. Therefore, the viewing angle adjusting panel is switched to different peep-proof viewing angles, and the peep-proof use scene is expanded.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a viewing angle adjusting panel, a viewing angle adjusting method and a display device. BACKGROUND

[0002] With the continuous innovation and development of display technology, different display technology products are diversified, and consumer demand and industry demand are also diversified and enriched, especially the peep-proof performance of display devices.

[0003] At present, the peep-proof design mainly attaches a peep-proof film to the display panel for viewing angle adjustment, and only a single fixed viewing angle can be adjusted, the viewing angle is determined by the interval and angle of the louver peep-proof layer, and there is great inconvenience and great limitation in the scene. SUMMARY

[0004] The purpose of the present application is to provide a viewing angle adjusting panel, which aims to solve the problem of single peep-proof viewing angle and limited use scene of the traditional peep-proof structure.

[0005] The first aspect of the embodiment of the present application proposes a viewing angle adjusting panel stacked on a display panel, which comprises: a first substrate; a light-transmitting layer stacked on the first substrate, the light-transmitting layer comprising light-shielding layers and convex lenses arranged alternately along a first direction; a second substrate stacked on the light-transmitting layer; a first electrode layer stacked on the second substrate, the first electrode layer comprising a plurality of first electrodes arranged at intervals along the first direction, the projection of the first electrode on the first substrate and the projection of the light-shielding layer on the first substrate being coincident; a second electrode layer stacked on the first electrode layer, the second electrode layer being a surface electrode; a third substrate arranged opposite to the second substrate; a third electrode layer stacked on the third substrate, the projection of the third electrode on the first substrate and the projection of the light-shielding layer on the first substrate being misaligned; a fourth electrode layer stacked on the third electrode layer, the fourth electrode layer being a surface electrode; a liquid crystal layer between the second electrode layer and the fourth electrode layer; The first electrode layer, the second electrode layer, the third electrode layer and the fourth electrode layer are used for receiving bias voltages of corresponding sizes to drive the dye liquid crystal at different positions of the liquid crystal layer to deflect, so as to switch the viewing angle adjusting panel to different viewing angles.

[0006] Optionally, the viewing angle adjusting panel further comprises: The alignment layer includes a first alignment layer and a second alignment layer. The first alignment layer is stacked on the second electrode layer, and the second alignment layer is stacked on the fourth electrode layer. The liquid crystal layer is located between the first alignment layer and the second alignment layer. The first alignment layer and the second alignment layer are used to align the dye liquid crystal in a second direction, which intersects with the first direction.

[0007] Optionally, the alignment angle of the first alignment layer is 90°, and the alignment angle of the second alignment layer is 270°.

[0008] Optionally, the dye liquid crystal includes negative liquid crystal and dihedral black dye liquid crystal.

[0009] A second aspect of this invention provides a viewing angle adjustment method applied to the viewing angle adjustment panel described above, the viewing angle adjustment method comprising: According to the first viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to each of the first electrode layer, the second electrode layer and the fourth electrode layer of the first electrode layer of the viewing angle adjustment panel, thereby driving the dye liquid crystal in the liquid crystal layer corresponding to the first electrode to deflect, so as to switch the viewing angle adjustment panel to the first privacy viewing angle. According to the second viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to each first electrode of the first electrode layer, each third electrode of the second electrode layer, each third electrode of the third electrode layer, and the fourth electrode layer, thereby driving the dye liquid crystal in the liquid crystal layer corresponding to the first electrode and the third electrode to deflect, so as to switch the viewing angle adjustment panel to the second privacy viewing angle. According to the third viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to the first electrode of the 2i-1th first electrode layer, the second electrode layer, the third electrode layer and the fourth electrode layer of the first electrode layer, driving the dye liquid crystal of each third electrode of the corresponding 2i-1th first electrode and the third electrode in the liquid crystal layer to deflect, so as to switch the viewing angle adjustment panel to the third privacy viewing angle, where i is a positive integer; According to the fourth viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to the first electrode of the 2ith electrode layer, the second electrode layer, the third electrode layer and the fourth electrode layer, driving the dye liquid crystal corresponding to the first electrode and the third electrode of the liquid crystal layer to deflect, so as to switch the viewing angle adjustment panel to the fourth privacy viewing angle.

[0010] Optionally, under the first privacy viewing angle, each first electrode of the first electrode layer is input with a first bias voltage, and the second electrode layer and the fourth electrode layer are input with a second bias voltage, wherein the first bias voltage is greater than the second bias voltage.

[0011] Optionally, under the second privacy viewing angle, each first electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage, wherein the first bias voltage is greater than the second bias voltage and the third bias voltage is greater than the first bias voltage.

[0012] Optionally, under the third privacy viewing angle, the first electrode of the 2i-1th electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

[0013] Optionally, under the fourth privacy viewing angle, the first electrode of the 2ith electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

[0014] A third aspect of the present invention provides a display device, including a display panel, a driving circuit, and a viewing angle adjustment panel as described above. The viewing angle adjustment panel is stacked on the display panel, and the driving circuit is connected to both the display panel and the viewing angle adjustment panel. The driving circuit is used to implement the steps of the viewing angle adjustment method described above.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: The above-mentioned viewing angle adjustment panel is stacked on the display panel. The viewing angle adjustment panel includes a first substrate, a light-transmitting layer, a second substrate, a first electrode layer, a second electrode layer, a liquid crystal layer, a fourth electrode layer, a third electrode layer, and a third substrate stacked in sequence. The first electrode layer includes multiple first electrodes, and the third electrode layer includes multiple third electrodes. The first electrodes and the third electrodes are staggered. When the first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer receive a bias voltage of a corresponding magnitude, the dye liquid crystal at different positions of the liquid crystal layer is deflected, so as to switch the viewing angle adjustment panel to different privacy viewing angles and expand the privacy protection application scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the display device provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the first structure of the viewing angle adjustment panel provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the light-transmitting layer provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of the first electrode and the third electrode provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the first structure of the viewing angle adjustment panel provided in Embodiments 1 and 2 of the present invention; Figure 6 This is a schematic diagram of a second structure of the viewing angle adjustment panel provided in Embodiments 1 and 2 of the present invention; Figure 7 This is a schematic diagram of a third structure of the viewing angle adjustment panel provided in Embodiments 1 and 2 of the present invention; Figure 8 This is a flowchart illustrating the viewing angle adjustment method provided in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the structure of the display device provided in Embodiment 3 of the present invention.

[0017] The figures in the diagram are labeled as follows: 100, Viewing angle adjustment panel; 200, Display panel; 300, Driving circuit; 10, First substrate; 20, Light-transmitting layer; 21, Convex lens; 22, Light-shielding layer; 30, Second substrate; 40, First electrode; 50, Second electrode layer; 60, First alignment layer; 70, Liquid crystal layer; 71, Dye liquid crystal; 80, Second alignment layer; 90, Fourth electrode layer; 101, Third electrode; 102, Third substrate; X1, first direction; X2, second direction; X3, third direction. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Example 1 A first aspect of this invention provides a viewing angle adjustment panel 100, such as... Figure 1As shown, the viewing angle adjustment panel 100 is stacked on the display panel 200. The stacked display panel 200 can be a passively light-emitting LCD (Liquid Crystal Display) panel or an actively light-emitting OLED (Organic Light-Emitting Diode) panel, etc. When it is a passively light-emitting LCD panel, the display device can be equipped with a corresponding backlight module to provide a backlight.

[0021] The display panel 200 outputs a display image, which is transmitted to the outside through the viewing angle adjustment panel 100 by adjusting the set viewing angle. The observer observes the display image according to the set viewing angle.

[0022] like Figure 2 As shown, in this embodiment, the viewing angle adjustment panel 100 includes: First substrate 10; A light-transmitting layer 20 is stacked on the first substrate 10. The light-transmitting layer 20 includes a light-shielding layer 22 and a convex lens 21 that are alternately arranged along the first direction X1. The second substrate 30 is stacked on the light-transmitting layer 20; A first electrode layer is stacked on the second substrate 30. The first electrode layer includes a plurality of first electrodes 40 spaced apart along the first direction X1. The projection of the first electrode 40 on the first substrate 10 coincides with the projection of the light-shielding layer 22 on the first substrate 10. The second electrode layer 50 is stacked on the first electrode layer, and the second electrode layer 50 is a surface electrode. The third substrate 102 is disposed opposite to the second substrate 30; The third electrode layer is stacked on the third substrate 102. The third electrode layer includes a plurality of third electrodes 101 spaced apart along the first direction X1. The projection of the third electrode 101 on the first substrate 10 is misaligned with the projection of the light-shielding layer 22 on the first substrate 10. The fourth electrode layer 90 is stacked on the third electrode layer, and the fourth electrode layer 90 is a surface electrode; The liquid crystal layer 70 is located between the second electrode layer 50 and the fourth electrode layer 90; The first electrode layer, the second electrode layer 50, the third electrode layer, and the fourth electrode layer 90 are used to receive bias voltages of corresponding magnitudes to drive the dye liquid crystal 71 at different positions of the liquid crystal layer 70 to deflect, so as to switch the viewing angle adjustment panel 100 to different viewing angles.

[0023] In this embodiment, the display image emitted by the display panel 200 is transmitted to the light-transmitting layer 20 through the first substrate 10, such as... Figure 3As shown, the light-transmitting layer 20 includes a light-shielding layer 22 and a convex lens 21 alternately arranged along a first direction X1. The light-shielding layer 22 and the convex lens 21 extend along a third direction X3 and are arranged in a strip shape. The first direction X1 and the third direction X3 intersect. The first direction X1 and the third direction X3 are the extension directions of the first substrate 10, which can be the length direction and the width direction of the first substrate 10, respectively.

[0024] The light-shielding layer 22 is used to isolate the convex lens 21 and to converge the light from different light-transmitting areas. The convex lens 21 is used to concentrate and emit the incident light, and to achieve zoned light control at different positions of the liquid crystal layer 70.

[0025] The first electrode layer includes multiple first electrodes 40 arranged side-by-side along the first direction X1, and the third electrode layer includes multiple third electrodes 101 arranged side-by-side along the first direction X1, such as... Figure 4 As shown, the first electrode 40 and the third electrode 101 extend along the third direction X3 and are arranged in a strip shape. From the viewing angle of the second direction X2, such as the top view, the projections of the first electrode 40 and the third electrode 101 on the first substrate 10 are misaligned, and the projection of the first electrode 40 on the first substrate 10 coincides with the projection of the light-shielding layer 22 on the first substrate 10. The third electrode 101 may coincide with the projection of the convex lens 21 along the first direction X1 or be smaller than the size of the convex lens 21. The first electrode 40 and the third electrode 101 are used to adjust the horizontal viewing angle range.

[0026] The second electrode layer 50 is stacked on the first electrode 40. The second electrode is a surface electrode, meaning that the second electrode has the same size as the second substrate 30. The fourth electrode layer 90 is stacked on the third electrode 101. The fourth electrode layer 90 is a surface electrode, meaning that the fourth electrode layer 90 has the same size as the third substrate 102.

[0027] The first substrate 10, the second substrate 30, and the third substrate 102 are transparent substrates, and can be transparent glass substrates or transparent resin substrates, etc.

[0028] The liquid crystal layer 70 has a dye liquid crystal 71. When a bias voltage is applied to the electrodes on the upper and lower sides of the dye liquid crystal 71, the dye liquid crystal 71 rotates, realizing the refraction, scattering and absorption of light, and realizing the change of brightness at different angles, thereby realizing the control of the viewing angle range.

[0029] The liquid crystal layer 70 includes a light-transmitting area and a light-blocking area. The light-blocking layer 22 is a light-blocking area, and the convex lens 21 is a light-blocking area. The light-transmitting area and the light-blocking area have corresponding dye liquid crystals 71.

[0030] Depending on the different privacy viewing angle requirements, different combinations of bias voltages can be output to the first electrode 40 of the first electrode layer, the second electrode layer 50, the third electrode 101 of the third electrode layer, and the fourth electrode layer 90. The dye liquid crystal 71 in the light-transmitting area and the non-light-transmitting area of ​​the liquid crystal layer 70 are deflected accordingly, and the viewing angle adjustment panel 100 is adjusted to different viewing angles.

[0031] For example, in an optional embodiment, the first electrode 40 of the first electrode layer and the third electrode 101 of the third electrode layer are not subjected to bias voltage, while the second electrode layer 50 and the fourth electrode layer 90 are subjected to bias voltages of different magnitudes. The dye liquid crystals 71 corresponding to the liquid crystal layer 70 all have electric fields, thereby achieving liquid crystal deflection. The display image of the display panel 200 can be transmitted through the dye liquid crystals 71 in the light-transmitting area and the non-light-transmitting area, and finally transmitted to the outside through the third substrate 102. The observer can observe the display image from the frontal view and the left and right view.

[0032] Alternatively, in another optional embodiment, a first bias voltage is applied to the second electrode layer 50 and the fourth electrode layer 90, a second bias voltage is applied to the first electrode 40 of the first electrode layer, and no bias voltage is applied to the third electrode 101 of the third electrode layer, such as... Figure 5 As shown, at this time, the first electrode 40 of the first electrode layer corresponds to the non-transparent area, and there is an electric field between the first electrode 40 of the first electrode layer and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is no electric field in the dye liquid crystal 71 in the non-transparent area. At this time, the dye liquid crystal 71 in the non-transparent area deflects, while the dye liquid crystal 71 in the transparent area does not deflect. No light passes through in the vertical direction, that is, a black screen is displayed at the normal viewing angle. When the dye liquid crystal 71 in the non-transparent area deflects, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area. The display screen can be observed from the left and right viewing angles. At the same time, by changing the first bias voltage and the second bias voltage to form electric fields of different magnitudes, the privacy angle of the left and right viewing angles can be adjusted to achieve control of the left and right viewing angles.

[0033] Alternatively, in another optional embodiment, a first bias voltage is applied to the second electrode layer 50 and the fourth electrode layer 90, a second bias voltage is applied to the first electrode 40 of the first electrode layer, and a third bias voltage is applied to the third electrode 101 of the third electrode layer. The third bias voltage is greater than the second bias voltage, and the second bias voltage is greater than the first bias voltage. In this case, as... Figure 6As shown, the first electrode 40 of the first electrode layer corresponds to the non-transparent area. There is an electric field between the first electrode 40 of the first electrode layer and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is an electric field between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas deflects, and light passes through in the vertical direction. The normal picture is displayed from the front viewing angle. The light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area. The display picture can also be observed from the left and right viewing angles. At the same time, by changing the magnitude of the first bias voltage, the second bias voltage and the third bias voltage, different electric fields can be formed, and the privacy angle of the left and right viewing angles can be adjusted to achieve left and right viewing angle control.

[0034] Alternatively, in another optional embodiment, a first bias voltage is applied to the second electrode layer 50 and the fourth electrode layer 90, and a second bias voltage is applied to an odd number of the first electrodes 40 in the first electrode layer, such as the first first electrode 40, the third first electrode 40, the fifth first electrode 40, etc. A third bias voltage is applied to the third electrode 101 of the third electrode layer, and the third bias voltage is greater than the second bias voltage, and the second bias voltage is greater than the first bias voltage. In this case, such as Figure 7 As shown, an odd number of first electrodes 40 are located on the left side of the convex lens 21, and an even number of first electrodes 40 are located on the right side of the convex lens 21. The odd number of first electrodes 40 correspond to the non-transparent area on the left side of the convex lens 21. There is an electric field between the odd number of first electrodes 40 and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is an electric field between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the left side of the convex lens 21 is deflected, and light passes through in the vertical direction. The normal image is displayed from the frontal viewing angle. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the left side of the convex lens 21. The display image can also be observed from the left viewing angle, but not from the right viewing angle. In addition, by changing the magnitude of the first bias voltage, the second bias voltage, and the third bias voltage to form different electric fields, the privacy angle of the left viewing angle can be adjusted to achieve left viewing angle control.

[0035] Alternatively, in another optional embodiment, a first bias voltage is applied to the second electrode layer 50 and the fourth electrode layer 90, and a second bias voltage is applied to an even number of the first electrodes 40 in the first electrode layer, such as the second first electrode 40, the fourth first electrode 40, the sixth first electrode 40, etc. A third bias voltage is applied to the third electrode 101 of the third electrode layer. The third bias voltage is greater than the second bias voltage, and the second bias voltage is greater than the first bias voltage. In this case, an odd number of the first electrodes 40 are located on the left side of the convex lens 21, and an even number of the first electrodes 40 are located on the right side of the convex lens 21. The even number of the first electrodes 40 corresponds to the non-transparent area on the right side of the convex lens 21. The even number of the first electrodes 40 and the fourth electrode layer 90 are... An electric field exists between the electrode layers 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. An electric field exists between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the right side of the convex lens 21 is deflected, and light passes through in the vertical direction. The normal image is displayed from the positive viewing angle. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the right side of the convex lens 21. The display image can also be observed from the right viewing angle, but the display image cannot be observed from the left viewing angle. In addition, by changing the magnitude of the first bias voltage, the second bias voltage and the third bias voltage, different electric fields can be formed, and the privacy angle of the right viewing angle can be adjusted to achieve right viewing angle control.

[0036] Furthermore, when no electric field is applied to the electrodes of the viewing angle adjustment panel 100, the orientation of each dye-liquid crystal 71 may be disordered, resulting in different deflection directions of the dye-liquid crystal 71 corresponding to the light-transmitting and non-light-transmitting areas when an electric field is applied, leading to abnormal light emission. To solve this problem, in an optional embodiment, such as... Figure 1 As shown, the viewing angle adjustment panel 100 also includes: The alignment layer includes a first alignment layer 60 and a second alignment layer 80. The first alignment layer 60 is stacked on the second electrode layer 50, and the second alignment layer 80 is stacked on the fourth electrode layer 90. The liquid crystal layer 70 is located between the first alignment layer 60 and the second alignment layer 80. The first alignment layer 60 and the second alignment layer 80 are used to align the dye liquid crystal 71 in a second direction X2, which intersects with the first direction X1.

[0037] In this embodiment, after photoalignment, the first alignment layer 60 and the second alignment layer 80 are subjected to an anchoring force along the second direction X2, such as... Figure 2 As shown, the long axis of the dye liquid crystal 71 is aligned along the second direction X2, so that when no electric field is applied to each electrode, the dye liquid crystal 71 presents the same direction, and when an electric field is applied, the dye liquid crystal 71 in different regions is deflected in an orderly manner, so that the dye liquid crystal 71 in the liquid crystal layer 70 presents an orderly state, ensuring that the light in the corresponding region is emitted to the outside according to the corresponding viewing angle, thereby realizing viewing angle control.

[0038] The alignment layer can be made of polyimide. After photoalignment, the polyimide material applies a vertical anchoring force to the dye liquid crystal 71. In an optional embodiment, to achieve vertical alignment, the alignment angle of the first alignment layer 60 is 90° and the alignment angle of the second alignment layer 80 is 270°. The alignment angles of the first alignment layer 60 and the second alignment layer 80 to the dye liquid crystal 71 are opposite, and a vertical anchoring force is applied to the dye liquid crystal 71, so that the long axis of the dye liquid crystal 71 is aligned along the second direction X2.

[0039] The light-shielding layer 22 can be made of light-absorbing material, such as a black matrix, and the convex lens 21 can be set with corresponding curvature, length, width and height according to the viewing angle range, display effect and the size of the viewing angle adjustment panel 100.

[0040] The dye liquid crystal 71 can be selected as positive liquid crystal, negative liquid crystal, etc., according to the requirements. In an optional embodiment, the dye liquid crystal 71 includes negative liquid crystal and dihedral black dye liquid crystal 71. When an electric field is applied to the electrode layers on the upper and lower sides of the dye liquid crystal 71, the negative liquid crystal rotates and drives the dihedral black dye liquid crystal 71 to deflect, thereby realizing the refraction, scattering and absorption of light, realizing the change of brightness at different angles, and thus realizing the control of the viewing angle range.

[0041] When preparing the viewing angle adjustment panel 100, multiple light-shielding layers 22 spaced apart can be stacked on the first substrate 10, and then a convex lens 21 can be placed between the light-shielding layers 22. Then, a second substrate 30 is formed on the light-transmitting layer 20, and a first electrode layer, a second electrode layer 50 and a first alignment layer 60 are sequentially stacked on the second substrate 30. A third electrode layer, a fourth electrode layer 90 and a second alignment layer 80 are sequentially stacked on the third substrate 102. A liquid crystal layer 70 is formed between the second substrate 30 and the third substrate 102, and a dye liquid crystal 71 is bonded and sealed by a structure such as a frame adhesive.

[0042] In order to prevent short circuits or the formation of direct-current circuits when a bias voltage is applied to the stacked electrode layers, in an optional embodiment, an insulating layer is also stacked between the first electrode layer and the second electrode layer 50, and an insulating layer is also stacked between the third electrode layer and the fourth electrode layer 90. The insulating layer is used to achieve electrical insulation, avoid problems such as short circuits and DC paths, and improve driving safety.

[0043] The beneficial effects of the present invention compared with the prior art are as follows: The viewing angle adjustment panel 100 is stacked on the display panel 200. The viewing angle adjustment panel 100 includes a first substrate 10, a light-transmitting layer 20, a second substrate 30, a first electrode layer, a second electrode layer 50, a liquid crystal layer 70, a fourth electrode layer 90, a third electrode layer, and a third substrate 102 stacked in sequence. The first electrode layer includes multiple first electrodes 40, and the third electrode layer includes multiple third electrodes 101. The first electrodes 40 and the third electrodes 101 are staggered. When the first electrodes 40, the second electrode layer 50, the third electrodes 101, and the fourth electrode layer 90 of the first electrode layer receive a bias voltage of a corresponding magnitude, they drive the dye liquid crystal 71 at different positions of the liquid crystal layer 70 to deflect, thereby switching the viewing angle adjustment panel 100 to different privacy viewing angles and expanding the privacy protection application scenarios.

[0044] Example 2 Based on the aforementioned viewing angle adjustment panel 100, a second aspect of this invention provides a viewing angle adjustment method applied to the aforementioned viewing angle adjustment panel 100, the viewing angle adjustment method comprising: S10. Based on the first viewing angle adjustment signal, output a bias voltage of the corresponding magnitude to each of the first electrode 40, the second electrode layer 50 and the fourth electrode layer 90 of the first electrode layer of the viewing angle adjustment panel 100, drive the dye liquid crystal 71 in the liquid crystal layer 70 corresponding to the first electrode 40 to deflect, so as to switch the viewing angle adjustment panel 100 to the first privacy viewing angle.

[0045] In this embodiment, the viewing angle adjustment panel 100 can operate in a leak prevention scenario, that is, the display screen cannot be observed from the frontal view, but can be observed from the side view.

[0046] In this scenario, bias voltages are applied to the first electrode 40, the second electrode layer 50, and the fourth electrode layer 90 of the first electrode layer, while no bias voltage is applied to the third electrode 101 of the third electrode layer. Figure 5 As shown, at this time, the first electrode 40 of the first electrode layer corresponds to the non-transparent area, and an electric field is formed between the first electrode 40 of the first electrode layer and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is no electric field in the dye liquid crystal 71 in the non-transparent area. At this time, the dye liquid crystal 71 in the non-transparent area deflects, while the dye liquid crystal 71 in the transparent area does not deflect. No light passes through in the vertical direction, that is, a black screen is displayed at the normal viewing angle. When the dye liquid crystal 71 in the non-transparent area deflects, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area, and the display screen can be observed from the left and right viewing angles.

[0047] In order to achieve the goal of having no electric field in the light-transmitting area and having an electric field in the non-light-transmitting area, in an optional embodiment, under the first privacy viewing angle, each first electrode 40 of the first electrode layer is input with a first bias voltage, and the second electrode layer 50 and the fourth electrode layer 90 are input with a second bias voltage. The first bias voltage is greater than the second bias voltage. At this time, there is an electric field between the first electrode 40 and the fourth electrode layer 90 of the first electrode layer. The dye liquid crystal 71 in the non-light-transmitting area deflects, while the dye liquid crystal 71 in the light-transmitting area does not deflect. No light passes through in the vertical direction. The dye liquid crystal 71 in the non-light-transmitting area deflects, and light can be transmitted to the outside through the dye liquid crystal 71 in the non-light-transmitting area. The display screen can be observed from the left and right viewing angles. At the same time, by changing the first bias voltage and the second bias voltage to form electric fields of different magnitudes, the privacy angle of the left and right viewing angles can be adjusted to achieve control of the left and right viewing angles.

[0048] S20. Based on the second viewing angle adjustment signal, output a bias voltage of the corresponding magnitude to each of the first electrode 40, the second electrode layer 50, the third electrode 101 and the fourth electrode layer 90 of the first electrode layer, drive the dye liquid crystal 71 in the liquid crystal layer 70 corresponding to the first electrode 40 and the third electrode 101 to deflect, so as to switch the viewing angle adjustment panel 100 to the second privacy viewing angle.

[0049] In this embodiment, the viewing angle adjustment panel 100 can work in the first anti-peeping scenario, that is, it can simultaneously adjust the left and right anti-peeping viewing angle range to achieve anti-peeping for left and right observers.

[0050] In this scenario, bias voltages are applied to the first electrode 40 of the first electrode layer, the second electrode layer 50, the third electrode 101 of the third electrode layer, and the fourth electrode layer 90, respectively. The bias voltages applied to the second electrode layer 50 and the fourth electrode layer 90 are equal, while the bias voltage applied to the first electrode 40 of the first electrode layer is unequal to the bias voltage on the fourth electrode layer 90. An electric field is formed between the first electrode 40 and the fourth electrode layer 90. Simultaneously, the bias voltage applied to the third electrode 101 of the third electrode layer is unequal to the bias voltage on the second electrode layer 50, and an electric field is formed between the second electrode layer 50 and the third electrode 101 of the third electrode layer. Figure 6 As shown, the dye liquid crystal 71 in the non-transparent and transparent areas is deflected, allowing light to pass through in the vertical direction. The normal image is displayed when viewed from the front. Light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area, and the displayed image can also be observed from the left and right viewing angles. At the same time, by changing the magnitude of the bias voltage of the first electrode 40 of the first electrode layer, the second electrode layer 50, the third electrode 101 of the third electrode layer, and the fourth electrode layer 90, different electric fields can be formed, thereby adjusting the privacy angle of the left and right viewing angles and realizing the control of the left and right viewing angles.

[0051] In order to achieve liquid crystal deflection in the light-transmitting and non-light-transmitting areas, in an optional embodiment, under the second privacy viewing angle, each first electrode 40 of the first electrode layer receives a first bias voltage, the second electrode layer 50 and the fourth electrode layer 90 receive a second bias voltage, and each third electrode 101 of the third electrode layer receives a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage. At this time, as... Figure 6 As shown, there is an electric field between the first electrode 40 of the first electrode layer and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is an electric field between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent area and the transparent area are deflected, and light passes through in the vertical direction. The normal picture is displayed when viewed from the front. Light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area. The display picture can also be observed from the left and right viewing angles.

[0052] S30. Based on the third viewing angle adjustment signal, output a bias voltage of the corresponding magnitude to the first electrode 40 of the 2i-1th first electrode layer, the second electrode layer 50, the third electrode layer 101 of each third electrode layer and the fourth electrode layer 90, drive the dye liquid crystal 71 in the liquid crystal layer 70 corresponding to the first electrode 40 and the third electrode 101 of the 2i-1th first electrode to deflect, so as to switch the viewing angle adjustment panel 100 to the third privacy viewing angle, where i is a positive integer.

[0053] In this embodiment, the viewing angle adjustment panel 100 can work in the second privacy protection scenario, that is, the privacy protection viewing angle of one side can be adjusted independently, so that the left observer can observe the display screen / the right observer cannot observe the display screen.

[0054] In this scenario, bias voltages are applied to the first electrode 40, the second electrode layer 50, the third electrode 101 of the third electrode layer, and the fourth electrode layer 90 of the (2i-1)th electrode. The first electrode 40 of the (2i-1)th electrode is located to the left of the convex lens 21, and the first electrode 40 of the (2i-1)th electrode is located to the right of the convex lens 21. The first electrode 40 of the (2i-1)th electrode corresponds to the non-transparent area on the left side of the convex lens 21. An electric field exists between the first electrode 40 of the (2i-1)th electrode and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. An electric field exists between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the left side of the convex lens 21 is deflected, as shown... Figure 7 As shown, light passes through in the vertical direction, and the normal image is displayed from the frontal view. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the left side of the convex lens 21. The display image can also be observed from the left view, but the display image cannot be observed from the right view. In addition, by changing the magnitude of the first bias voltage, the second bias voltage and the third bias voltage, different electric fields can be formed, and the privacy angle of the left view can be adjusted to achieve left view control.

[0055] In order to achieve liquid crystal deflection in the light-transmitting area and the left non-light-transmitting area, in an optional embodiment, under the third privacy viewing angle, the first electrode 40 of the 2i-1th electrode of the first electrode layer is input with a first bias voltage, the second electrode layer 50 and the fourth electrode layer 90 are input with a second bias voltage, and each third electrode 101 of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

[0056] The first electrode 40 of the 2i-1th type can be the first first electrode 40, the third first electrode 40, the fifth first electrode 40, etc., such as Figure 7 As shown, an odd number of first electrodes 40 are located on the left side of the convex lens 21, and an even number of first electrodes 40 are located on the right side of the convex lens 21. The odd number of first electrodes 40 correspond to the non-transparent area on the left side of the convex lens 21. There is an electric field between the odd number of first electrodes 40 and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is an electric field between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the left side of the convex lens 21 is deflected, and light passes through in the vertical direction. The normal image is displayed from the frontal viewing angle. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the left side of the convex lens 21. The display image can also be observed from the left viewing angle, but not from the right viewing angle. In addition, by changing the magnitude of the first bias voltage, the second bias voltage, and the third bias voltage to form different electric fields, the privacy angle of the left viewing angle can be adjusted to achieve left viewing angle control.

[0057] S40. Based on the fourth viewing angle adjustment signal, output a bias voltage of the corresponding magnitude to the first electrode 40 of the second electrode layer, the second electrode layer 50, the third electrode 101 of the third electrode layer and the fourth electrode layer 90 of the first electrode layer, drive the dye liquid crystal 71 in the liquid crystal layer 70 corresponding to the second electrode 40 and each third electrode 101 to deflect, so as to switch the viewing angle adjustment panel 100 to the fourth privacy viewing angle.

[0058] In this embodiment, the viewing angle adjustment panel 100 can work in the second privacy protection scenario, that is, the privacy protection viewing angle of one side can be adjusted independently, so that the left observer can observe the display screen / the right observer cannot observe the display screen.

[0059] In this scenario, bias voltages are applied to the first electrode 40, the second electrode layer 50, the third electrode 101 of the third electrode layer, and the fourth electrode layer 90 of the 2i-th electrode. The first electrode 40 of the 2i-1-th electrode is located to the left of the convex lens 21, and the first electrode 40 of the 2i-th electrode is located to the right of the convex lens 21. The first electrode 40 of the 2i-th electrode corresponds to the non-transparent area on the right side of the convex lens 21. An electric field exists between the first electrode 40 of the 2i-th electrode and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. An electric field exists between the lens and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the right side of the convex lens 21 deflects, allowing light to pass through in the vertical direction. A normal image is displayed from the front viewing angle. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the right side of the convex lens 21. The display image can also be observed from the right viewing angle, but not from the left viewing angle. Furthermore, by changing the magnitudes of the first bias voltage, the second bias voltage, and the third bias voltage to form different electric fields, the privacy angle of the right viewing angle can be adjusted, thus achieving right viewing angle control.

[0060] In order to achieve liquid crystal deflection in the light-transmitting area and the left non-light-transmitting area, in an optional embodiment, under the fourth privacy viewing angle, the first electrode 40 of the 2ith electrode of the first electrode layer is input with a first bias voltage, the second electrode layer 50 and the fourth electrode layer 90 are input with a second bias voltage, and the third electrode 101 of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

[0061] The first electrode 40 of the 2ith type can be the second first electrode 40, the fourth first electrode 40, the sixth first electrode 40, etc. The odd number of first electrodes 40 are located on the left side of the convex lens 21, and the even number of first electrodes 40 are located on the right side of the convex lens 21. The even number of first electrodes 40 correspond to the non-transparent area on the left side of the convex lens 21. There is an electric field between the even number of first electrodes 40 and the fourth electrode layer 90. The third electrode 101 of the third electrode layer corresponds to the non-transparent area. There is an electric field between the third electrode 101 of the third electrode layer and the second electrode layer 50. The dye liquid crystal 71 in the non-transparent and transparent areas on the right side of the convex lens 21 is deflected, and light passes through in the vertical direction. The normal picture is displayed when viewed from the front. At the same time, light can be transmitted to the outside through the dye liquid crystal 71 in the non-transparent area on the right side of the convex lens 21. The display picture can also be observed from the right view, but the display picture cannot be observed from the left view.

[0062] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0063] Example 3 The present invention also proposes a display device, which includes a display panel 200, a driving circuit 300, and a viewing angle adjustment panel 100. The specific structure of the viewing angle adjustment panel 100 is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The viewing angle adjustment panel 100 is stacked on the display panel 200, and the driving circuit 300 is connected to both the display panel 200 and the viewing angle adjustment panel 100. The driving circuit 300 is used to implement the steps of the above-described viewing angle adjustment method.

[0064] In this embodiment, the driving circuit 300 may include a controller, a driving unit for the display panel, and a bias voltage output circuit. The driving unit for the display panel may include a corresponding source driving module and a gate driving module. The gate driving module is connected to the scan lines of the display panel 200 and outputs line scanning signals to drive the display panel 200 line by line. The source driving module is connected to the data lines of the display panel 200 and outputs data signals to the display panel 200 during line scanning to drive the pixel units of the display panel 200 to display corresponding image information. The displayed image is then transmitted to the viewing angle adjustment panel 100.

[0065] The controller receives corresponding video data and viewing angle adjustment signals, and outputs corresponding control signals to control the source drive module and gate drive module to work according to the video data. At the same time, the controller also outputs a corresponding combination of bias voltages to the first electrode 40, the second electrode layer 50, the third electrode 101 and the fourth electrode layer 90 of the first electrode layer of the viewing angle adjustment panel 100 based on the viewing angle adjustment signal and the above-mentioned viewing angle adjustment method. When the first electrode 40, the second electrode layer 50, the third electrode 101 and the fourth electrode layer 90 of the first electrode layer receive the corresponding bias voltage, they drive the dye liquid crystal 71 at different positions of the liquid crystal layer 70 to deflect, so as to switch the viewing angle adjustment panel 100 to different privacy viewing angles and expand the privacy protection application scenarios.

[0066] The gate driving module can use multiple shift registers connected in sequence. Each shift register is connected to a scan line and outputs a line scan signal line by line. The source driving module can be composed of multiple flip-chip films. The flip-chip films are bonded to the display panel 200. Each flip-chip film is provided with multiple transmission channels and a driving chip. The driving chip is connected to multiple data lines through multiple transmission channels and outputs multiple data signals to the display panel 200.

[0067] The bias voltage output circuit can be a switching power supply circuit, a buck-boost circuit, etc., and multiple bias voltage output circuits can be set, each connected to a corresponding electrode layer. In an optional embodiment, the bias voltage output circuit includes a first voltage output unit, a second voltage output unit, a third voltage output unit, and a fourth voltage output unit. The first voltage output unit is connected to the first electrode 40 of the 2i-1th electrode in the first electrode layer, the second voltage output unit is connected to the first electrode 40 of the 2ith electrode in the first electrode layer, the third voltage output unit is connected to each of the third electrodes 101 in the third electrode layer, and the fourth voltage output unit is connected to both the second electrode layer 50 and the fourth electrode layer 90. The first voltage output unit, the second voltage output unit, the third voltage output unit, and the fourth voltage output unit are respectively connected to a controller and output a bias voltage of the corresponding magnitude to the corresponding electrode according to the voltage adjustment signal output by the controller.

[0068] The voltage output unit can adopt a voltage regulator circuit, a switching power supply circuit, or other structures, and the specific structure is not limited.

[0069] The display panel 200 can be a passively light-emitting LCD (Liquid Crystal Display) panel or an actively light-emitting OLED (Organic Light-Emitting Diode) panel. When it is a passively light-emitting LCD panel, the display device may also include a corresponding backlight module to provide a backlight.

[0070] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A viewing angle adjustment panel, stacked on a display panel, characterized in that, The viewing angle adjustment panel includes: First substrate; A light-transmitting layer is stacked on the first substrate, the light-transmitting layer including a light-shielding layer and a convex lens alternately arranged along a first direction; A second substrate is stacked on the light-transmitting layer; A first electrode layer is stacked on the second substrate. The first electrode layer includes a plurality of first electrodes spaced apart along the first direction. The projection of the first electrodes on the first substrate coincides with the projection of the light-shielding layer on the first substrate. A second electrode layer is stacked on top of the first electrode layer, and the second electrode layer is a surface electrode. The third substrate is disposed opposite to the second substrate; A third electrode layer is stacked on the third substrate. The third electrode layer includes a plurality of third electrodes spaced apart along the first direction. The projection of the third electrodes on the first substrate and the projection of the light-shielding layer on the first substrate are misaligned. The fourth electrode layer is stacked on the third electrode layer, and the fourth electrode layer is a surface electrode; A liquid crystal layer is located between the second electrode layer and the fourth electrode layer; The first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer are used to receive bias voltages of corresponding magnitudes to drive the dye liquid crystals at different positions of the liquid crystal layer to deflect, so as to switch the viewing angle adjustment panel to different viewing angles.

2. The viewing angle adjustment panel as described in claim 1, characterized in that, The viewing angle adjustment panel also includes: The alignment layer includes a first alignment layer and a second alignment layer. The first alignment layer is stacked on the second electrode layer, and the second alignment layer is stacked on the fourth electrode layer. The liquid crystal layer is located between the first alignment layer and the second alignment layer. The first alignment layer and the second alignment layer are used to align the dye liquid crystal in a second direction, which intersects with the first direction.

3. The viewing angle adjustment panel as described in claim 2, characterized in that, The alignment angle of the first alignment layer is 90°, and the alignment angle of the second alignment layer is 270°.

4. The viewing angle adjustment panel as described in claim 1, characterized in that, The dye liquid crystal includes negative liquid crystal and dihedral black dye liquid crystal.

5. A viewing angle adjustment method, applied to the viewing angle adjustment panel as described in any one of claims 1 to 4, characterized in that, The viewpoint adjustment method includes: According to the first viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to each of the first electrode layer, the second electrode layer and the fourth electrode layer of the first electrode layer of the viewing angle adjustment panel, thereby driving the dye liquid crystal in the liquid crystal layer corresponding to the first electrode to deflect, so as to switch the viewing angle adjustment panel to the first privacy viewing angle. According to the second viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to each first electrode of the first electrode layer, each third electrode of the second electrode layer, each third electrode of the third electrode layer, and the fourth electrode layer, thereby driving the dye liquid crystal in the liquid crystal layer corresponding to the first electrode and the third electrode to deflect, so as to switch the viewing angle adjustment panel to the second privacy viewing angle. According to the third viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to the first electrode of the 2i-1th first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer, driving the dye liquid crystal in the liquid crystal layer corresponding to the 2i-1th first electrode and the third electrode to deflect, so as to switch the viewing angle adjustment panel to the third privacy viewing angle, where i is a positive integer; According to the fourth viewing angle adjustment signal, a bias voltage of the corresponding magnitude is output to the first electrode of the 2ith electrode of the first electrode layer, the third electrode of the second electrode layer, the third electrode layer, and the fourth electrode layer, thereby driving the dye liquid crystal in the liquid crystal layer corresponding to the 2ith first electrode and the third electrode to deflect, so as to switch the viewing angle adjustment panel to the fourth privacy viewing angle.

6. The viewing angle adjustment method as described in claim 5, characterized in that, Under the first privacy viewing angle, each first electrode of the first electrode layer is input with a first bias voltage, and the second electrode layer and the fourth electrode layer are input with a second bias voltage, wherein the first bias voltage is greater than the second bias voltage.

7. The viewing angle adjustment method as described in claim 5, characterized in that, Under the second privacy viewing angle, each first electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

8. The viewing angle adjustment method as described in claim 5, characterized in that, Under the third privacy viewing angle, the first electrode of the 2i-1th electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

9. The viewing angle adjustment method as described in claim 5, characterized in that, Under the fourth privacy viewing angle, the first electrode of the 2ith electrode of the first electrode layer is input with a first bias voltage, the second electrode layer and the fourth electrode layer are input with a second bias voltage, and each third electrode of the third electrode layer is input with a third bias voltage. The first bias voltage is greater than the second bias voltage, and the third bias voltage is greater than the first bias voltage.

10. A display device, characterized in that, The device includes a display panel, a driving circuit, and a viewing angle adjustment panel as described in any one of claims 1 to 4, wherein the viewing angle adjustment panel is stacked on the display panel, and the driving circuit is connected to both the display panel and the viewing angle adjustment panel. The driving circuit is used to implement the steps of the viewing angle adjustment method as described in any one of claims 5 to 9.

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