Display panel, display device and driving method

Abstract

The application discloses a display panel, a display device and a driving method. The display panel comprises a light adjusting box, first electrode strips of a first view angle control electrode and second electrode strips of a second view angle control electrode are arranged alternately on a first substrate, third electrode strips of a third view angle control electrode and fourth electrode strips of a fourth view angle control electrode are arranged alternately on a second substrate, and the light transmission axes of first polarizing plates and second polarizing plates on the upper and lower sides of the light adjusting box are parallel to each other. By arranging the first electrode strips and the second electrode strips on the first substrate and arranging the third electrode strips and the fourth electrode strips on the second substrate, when liquid crystal molecules in a first liquid crystal layer are controlled to be in an inclined posture, the light adjusting box has a light collecting effect, and a narrow view angle mode is realized; the cooperation of the first electrode strips and the second electrode strips and the cooperation of the third electrode strips and the fourth electrode strips can both control the liquid crystal molecules in the first liquid crystal layer to be in a disordered and scattered state, so that the light adjusting box has a plurality of scattering effects, and a plurality of wide view angle modes are realized.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, display device, and driving method. Background Technology

[0002] With the continuous advancement of LCD technology, the viewing angle of monitors has expanded from around 120° to over 160°. While enjoying the visual experience brought by a wider viewing angle, people also want to effectively protect trade secrets and personal privacy to avoid business losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the need for a wide viewing angle, many situations also require display devices to have the function of switching between wide and narrow viewing angles.

[0003] Currently, the main method used is to attach a Venetian blind film to the display screen to achieve the switching between wide and narrow viewing angles. When privacy is required, the screen can be covered with the Venetian blind film to narrow the viewing angle. However, this method requires an extra Venetian blind film, which causes great inconvenience to the user. Moreover, a Venetian blind film can only achieve one viewing angle. Once the Venetian blind film is attached, the viewing angle is fixed in the narrow viewing angle mode, making it impossible to switch freely between the wide and narrow viewing angle modes. In addition, the privacy film will reduce the brightness and affect the aesthetics.

[0004] Existing technologies also employ a dual-cell structure, utilizing a dimming box and a display panel to switch between wide and narrow viewing angles. The display panel handles normal image display, while the dimming box controls the viewing angle switching. The dimming box includes an upper substrate, a lower substrate, and a liquid crystal layer between them. Viewing angle control electrodes on the upper and lower substrates apply a vertical electric field to the liquid crystal molecules, causing them to deflect vertically, achieving a narrow viewing angle mode. By controlling the voltage on the viewing angle control electrodes, switching between wide and narrow viewing angles can be achieved. However, this display device requires a privacy screen protector or a prism light-gathering structure. Furthermore, the alignment direction of the dimming box and the extension direction of the electrode strips need to be at a specific angle to the light-gathering direction of the privacy screen protector, resulting in high manufacturing difficulty, high cost, and a thicker box. Because this display device requires a privacy screen protector or a prism light-gathering structure to achieve a narrow viewing angle effect, the wide viewing angle effect is poor, failing to adequately balance both wide and narrow viewing angles. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the present invention aims to provide a display panel, display device and driving method to solve the problems that the existing dimming box needs to be matched with a privacy film or prism light-collecting structure to achieve a narrow viewing angle effect, which has the problems of high manufacturing difficulty, high cost, thick box, and inability to well balance wide and narrow viewing angles.

[0006] The objective of this invention is achieved through the following technical solution: The present invention provides a display panel including a dimming box, the dimming box including a first substrate, a second substrate disposed opposite to the first substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate; The first substrate has a first viewing angle control electrode and a second viewing angle control electrode on the side facing the first liquid crystal layer. The second substrate has a third viewing angle control electrode and a fourth viewing angle control electrode on the side facing the first liquid crystal layer. The first viewing angle control electrode includes a plurality of first electrode strips, the second viewing angle control electrode includes a plurality of second electrode strips, the third viewing angle control electrode includes a plurality of third electrode strips, and the fourth viewing angle control electrode includes a plurality of fourth electrode strips. The projections of the first electrode strips and the second electrode strips on the first substrate are parallel to each other and alternately arranged. The projections of the third electrode strips and the fourth electrode strips on the second substrate are parallel to each other and alternately arranged. A first polarizer is provided on the first substrate, and a second polarizer is provided on the second substrate. The transmission axes of the first polarizer and the second polarizer are parallel to each other. In the narrow viewing angle mode, the liquid crystal molecules in the first liquid crystal layer are tilted and have a light-collecting effect; in the first wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer near the first substrate are in a disordered and scattered state and have a light-scattering effect; in the second wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer near the second substrate are in a disordered and scattered state and have a light-scattering effect; in the third wide viewing angle mode, all the liquid crystal molecules in the first liquid crystal layer are in a disordered and scattered state and have a light-scattering effect.

[0007] Furthermore, the alignment direction of the first liquid crystal layer near the first substrate is a first direction, and the alignment direction of the first liquid crystal layer near the second substrate is a second direction. The first direction and the second direction are perpendicular or parallel to each other.

[0008] Furthermore, the transmission axis of both the first polarizer and the second polarizer is perpendicular to the second direction.

[0009] Furthermore, the first liquid crystal layer uses positive liquid crystal molecules, the initial pretilt angle of the first liquid crystal layer near the first substrate is 0° to 7°, the initial pretilt angle of the first liquid crystal layer near the second substrate is 83° to 90°, the first direction is 90°, the second direction is 0°, and the transmission axis of the first polarizer and the transmission axis of the second polarizer are both 90°. The first electrode strip, the second electrode strip, the third electrode strip, and the fourth electrode strip all extend along a third direction, and the angle between the third direction and the first direction is 3° to 7°.

[0010] Furthermore, the first liquid crystal layer uses positive liquid crystal molecules, the initial pretilt angle of the first liquid crystal layer near the first substrate is 83° to 90°, the initial pretilt angle of the first liquid crystal layer near the second substrate is 0° to 7°, the first direction is 0°, the second direction is 90°, and the transmission axis of the first polarizer and the transmission axis of the second polarizer are both 0°. The first electrode strip, the second electrode strip, the third electrode strip, and the fourth electrode strip all extend along a fourth direction, and the angle between the fourth direction and the second direction is 3° to 7°.

[0011] Furthermore, the first liquid crystal layer uses positive liquid crystal molecules, and the initial pretilt angle of the first liquid crystal layer near the first substrate and near the second substrate is 0° to 7°. The initial pretilt angle of the first liquid crystal layer is 83° to 90°, the first direction is 90°, the second direction is 90°, and the transmission axis of the first polarizer and the transmission axis of the second polarizer are both 90°. The first substrate has a first raised structure layer on the side facing the first liquid crystal layer, and the refractive index of the first raised structure layer is equal to no.

[0012] Furthermore, the first liquid crystal layer uses positive liquid crystal molecules, and the initial pretilt angle of the first liquid crystal layer near the first substrate and near the second substrate is 0° to 7°. The initial pretilt angle of the first liquid crystal layer is 83° to 90°, the first direction is 90°, the second direction is 90°, and the transmission axis of the first polarizer and the transmission axis of the second polarizer are both 90°. The second substrate has a second raised structure layer on the side facing the first liquid crystal layer, and the refractive index of the second raised structure layer is equal to ne.

[0013] Furthermore, the display panel includes a display liquid crystal cell stacked on top of the dimming box. A third polarizer is provided on the side of the display liquid crystal cell away from the dimming box. The light transmission axes of the first polarizer and the second polarizer are both perpendicular to the light transmission axis of the third polarizer.

[0014] This application also provides a display device, including the display panel described above.

[0015] This application also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising: A first voltage signal is applied to the first view control electrode, a second voltage signal is applied to the second view control electrode, a third voltage signal is applied to the third view control electrode, and a fourth voltage signal is applied to the fourth view control electrode; In the narrow viewing angle mode, the first voltage signal and the second voltage signal are the same common voltage signal, the third voltage signal and the fourth voltage signal are the same AC voltage signal, and there is a first voltage difference between the third voltage signal and the common voltage signal and between the fourth voltage signal and the common voltage signal. The first voltage difference is greater than or equal to a first preset value, so that the liquid crystal molecules in the first liquid crystal layer are tilted and have a light-collecting function. In the first wide viewing angle mode, the first voltage signal and the second voltage signal are AC voltage signals with opposite polarities and have a second voltage difference. The third voltage signal and the fourth voltage signal are the same common voltage signal. The second voltage difference is greater than a second preset value, so that the liquid crystal molecules in the first liquid crystal layer near the first substrate are in a disordered and scattered state and have a light-scattering effect. In the second wide viewing angle mode, the first voltage signal and the second voltage signal are the same common voltage signal, the third voltage signal and the fourth voltage signal are AC voltage signals with opposite polarities and have a second voltage difference. The second voltage difference is greater than a second preset value, so that the liquid crystal molecules in the first liquid crystal layer near the second substrate are in a disordered and scattered state and have a light-scattering effect. In the third wide viewing angle mode, the first voltage signal and the second voltage signal are AC voltage signals with opposite polarities and have a second voltage difference. The third voltage signal and the fourth voltage signal are AC voltage signals with opposite polarities and have a second voltage difference. The second voltage difference is greater than a second preset value, so that all liquid crystal molecules in the first liquid crystal layer are in a disordered and scattered state and have a light-scattering effect.

[0016] The beneficial effects of this invention are as follows: By setting a first electrode strip and a second electrode strip on a first substrate, and further setting a third electrode strip and a fourth electrode strip on a second substrate, when the liquid crystal molecules in the first liquid crystal layer are controlled to be in a tilted posture, the dimming box has a light-gathering function, realizing a narrow viewing angle mode; moreover, the cooperation between the first and second electrode strips and the cooperation between the third and fourth electrode strips can control the liquid crystal molecules in the first liquid crystal layer to be in a disordered and scattered state, so that the dimming box has multiple light-scattering functions, realizing multiple wide viewing angle modes. Therefore, the dimming box in this application does not need to be equipped with a privacy screen protector or a prism light-gathering structure to achieve a narrow viewing angle effect, reducing the difficulty of manufacturing, manufacturing cost, and the thickness of the display panel; since no privacy screen protector or prism light-gathering structure is needed, the wide viewing angle effect is not affected, and both wide and narrow viewing angle effects can be well balanced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the planar structure of the first view control electrode and the second view control electrode in Embodiment 1 of the present invention.

[0019] Figure 3 This is a schematic diagram of the planar structure of the third-view control electrode and the fourth-view control electrode in Embodiment 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0021] Figure 5 This is a waveform diagram of the viewing angle control signal of the display device in narrow viewing angle mode in Embodiment 1 of the present invention.

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the display device in the narrow viewing angle mode in the fourth direction according to Embodiment 1 of the present invention.

[0023] Figure 7 This is a schematic diagram of the third-direction cross-sectional structure of the dimming box in narrow viewing angle mode according to Embodiment 1 of the present invention.

[0024] Figure 8 This is a simulation comparison diagram of the effects of dimming boxes with different thicknesses in narrow viewing angle mode in Embodiment 1 of the present invention.

[0025] Figure 9 This is a simulation comparison table of color shift in the horizontal direction for dimming boxes of different thicknesses in narrow viewing angle mode according to Embodiment 1 of the present invention.

[0026] Figure 10 This is a simulated comparison table of color shift in the vertical direction of dimming boxes with different thicknesses in narrow viewing angle mode according to Embodiment 1 of the present invention.

[0027] Figure 11 This is a waveform diagram of the viewing angle control signal of the display device in the first wide viewing angle mode in Embodiment 1 of the present invention.

[0028] Figure 12 This is a schematic diagram of the cross-sectional structure of the display device in the fourth direction in the first wide viewing angle mode according to Embodiment 1 of the present invention.

[0029] Figure 13 This is a waveform diagram of the viewing angle control signal of the display device in the second wide viewing angle mode in Embodiment 1 of the present invention.

[0030] Figure 14 This is a schematic diagram of the cross-sectional structure of the display device in the second wide viewing angle mode in the fourth direction according to Embodiment 1 of the present invention.

[0031] Figure 15This is a waveform diagram of the viewing angle control signal of the display device in the third wide viewing angle mode in Embodiment 1 of the present invention.

[0032] Figure 16 This is a schematic diagram of the cross-sectional structure of the display device in the third wide viewing angle mode in the fourth direction according to Embodiment 1 of the present invention.

[0033] Figure 17 This is a waveform diagram of the viewing angle control signal of the display device in the third wide viewing angle mode in another embodiment of the present invention.

[0034] Figure 18 This is a schematic diagram of the display device in its initial state according to Embodiment 2 of the present invention.

[0035] Figure 19 This is a schematic diagram of the display device in its initial state according to Embodiment 3 of the present invention.

[0036] Figure 20 This is a schematic diagram of the display device in the fourth wide viewing angle mode in Embodiment 3 of the present invention.

[0037] Figure 21 This is a schematic diagram of the display device in its initial state in another embodiment of the present invention.

[0038] Figure 22 This is one of the schematic diagrams of the planar structure of the display device in this invention.

[0039] Figure 23 This is the second schematic diagram of the planar structure of the display device in this invention. Detailed Implementation

[0040] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation methods, structures, features, and effects of the display panel, display device, and driving method proposed according to the present invention: [Example 1] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the planar structure of the first view control electrode and the second view control electrode in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the planar structure of the third-view control electrode and the fourth-view control electrode in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0041] like Figures 1 to 4As shown in Embodiment 1 of the present invention, a display panel includes a dimming box 10 and a display liquid crystal cell 20 stacked on top of each other. There is one dimming box 10 and one display liquid crystal cell 20. The dimming box 10 is located below the display liquid crystal cell 20, meaning the dimming box 10 and the display liquid crystal cell 20 are stacked sequentially in the direction facing the external environment. The dimming box 10 is used to control the wide and narrow viewing angle switching of the display device, and the display liquid crystal cell 20 is used to control the display device to display a normal image. Alternatively, the dimming box 10 can be located above the display liquid crystal cell 20, i.e., on the light-emitting side of the display liquid crystal cell 20.

[0042] The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a first liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12. A first polarizer 31 is disposed on the first substrate 11, and a second polarizer 32 is disposed on the second substrate 12. The transmission axes of the first polarizer 31 and the second polarizer 32 are parallel to each other. A third polarizer 33 is disposed on the side of the display liquid crystal cell 20 away from the dimming box 10. The transmission axes of the first polarizer 31 and the second polarizer 32 are both perpendicular to the transmission axis of the third polarizer 33. For example, the first polarizer 31 is disposed between the dimming box 10 and the display liquid crystal cell 20, the second polarizer 32 is disposed on the side of the dimming box 10 away from the display liquid crystal cell 20, and the third polarizer 33 is disposed on the side of the display liquid crystal cell 20 away from the dimming box 10.

[0043] In this embodiment, the first liquid crystal layer 13 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The positive liquid crystal molecules have a dielectric constant Δn = ne - no, where Δn > 0. A larger Δn is more beneficial for light scattering over a wide viewing angle. The range of Δn is 0.2 to 0.3, preferably Δn = 0.27. The optical path difference (Retardation) is greater than 700 nm. The thickness of the first liquid crystal layer 13 is 8 to 15 μm, for example, 11 μm. Figure 1 As shown, in the initial state, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 0° to 7°, and the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 83° to 90°. For example, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 4.5°, and the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 89°. That is, the initial pretilt angles of the first liquid crystal layer 13 near the first substrate 11 and near the second substrate 12 are approximately perpendicular. With this alignment method, not only can the response speed of switching between wide and narrow viewing angles be improved, but also, in the wide viewing angle mode, the liquid crystal molecules can be made more dispersed, improving the astigmatism effect of the wide viewing angle, and in the narrow viewing angle mode, the liquid crystal can be tilted upright, improving the narrow viewing angle effect.

[0044] In this embodiment, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is the first direction T1, and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is the second direction T2. ​​The first direction T1 and the second direction T2 are perpendicular to each other, thereby reducing color shift of the display panel during display, improving color shift, and avoiding mutual interference between upper and lower liquid crystal molecules in wide viewing angle mode. Optionally, the transmission axes of the first polarizer 31 and the second polarizer 32 are both parallel to the first direction T1, and both the transmission axes of the first polarizer 31 and the second polarizer 32 are perpendicular to the second direction T2. ​​The transmission axis of the third polarizer 33 is perpendicular to the first direction T1 and parallel to the second direction T2. ​​For example, the transmission axes of the first polarizer 31 and the second polarizer 32 are both 90°, and the transmission axis of the third polarizer 33 is 0°. The alignment direction of layer 13 near the first substrate 11 is 90°, and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is 0°. The initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 4.5°, and its alignment direction is 90°. The initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 89°, and its alignment direction is 0°. Combined with the fact that the transmission axes of the first polarizer 31 and the second polarizer 32 are both 90°, optimal light dispersion is achieved. Alternatively, in other embodiments, the first direction T1 and the second direction T2 can be parallel to each other, meaning the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is parallel to the alignment direction near the second substrate 12, the transmission axes of the first polarizer 31 and the second polarizer 32 are parallel to the alignment direction of the first liquid crystal layer 13, and the transmission axis of the third polarizer 33 is perpendicular to the alignment direction of the first liquid crystal layer 13.

[0045] In this embodiment, the first substrate 11 has a first viewing angle control electrode 111 and a second viewing angle control electrode 112 on the side facing the first liquid crystal layer 13. The first viewing angle control electrode 111 includes a plurality of first electrode strips 111a, and the second viewing angle control electrode 112 includes a plurality of second electrode strips 112a. The projections of the first electrode strips 111a and the second electrode strips 112a on the first substrate 11 are parallel to each other and alternately arranged. The second substrate 12 has a third viewing angle control electrode 121 and a fourth viewing angle control electrode 122 on the side facing the first liquid crystal layer 13. The third viewing angle control electrode 121 includes a plurality of third electrode strips 121a, and the fourth viewing angle control electrode 122 includes a plurality of fourth electrode strips 122a. The projections of the third electrode strips 121a and the fourth electrode strips 122a on the second substrate 12 are parallel to each other and alternately arranged. The first electrode strips 111a, second electrode strips 112a, third electrode strips 121a, and fourth electrode strips 122a all extend in the same direction. Thus, at wide viewing angles, applying corresponding wide viewing angle signals to the first electrode strip 111a and the second electrode strip 112a, and / or to the third electrode strip 121a and the fourth electrode strip 122a, can drive the positive liquid crystal molecules in the first liquid crystal layer 13 to deflect in the horizontal direction, so that the refractive index of the positive liquid crystal molecules in the first liquid crystal layer 13 near the first substrate 11 is in the range of no to ne, and / or so that the refractive index of the positive liquid crystal molecules in the first liquid crystal layer 13 near the second substrate 12 is in the range of no to ne, thereby achieving a light-scattering effect.

[0046] Furthermore, the first electrode strip 111a, the second electrode strip 112a, the third electrode strip 121a, and the fourth electrode strip 122a all extend along a third direction T3, and the angle between the third direction T3 and the first direction T1 is 3° to 7°. For example, the light transmission axis of the first polarizer 31 and the light transmission axis of the second polarizer 32 are both 90°, the light transmission axis of the third polarizer 33 is 0°, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is 90°, the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is 0°, and the first electrode strip 111a, the second electrode strip 112a, the third electrode strip 121a, and the fourth electrode strip 122a all extend along a direction of 83° to 87°. Because existing technologies align the liquid crystal layer parallel to the electrode strips, the liquid crystal molecules align chaotically after a wide viewing angle signal is applied, easily causing image distortion. Therefore, in this application, the alignment direction of the first liquid crystal layer 13 forms an angle with the electrode strips. After power is applied, the liquid crystal molecules rotate in a specific direction, preventing interference between them and thus avoiding image distortion. In other words, in this application, the alignment direction and initial pretilt angle of the first liquid crystal layer 13, the extension directions of the first electrode strip 111a and the second electrode strip 112a, the extension directions of the third electrode strip 121a and the fourth electrode strip 122a, and the light transmission axis orientation of the first polarizer 31 and the second polarizer 32 need to be interconnected. This coordination not only improves the response speed when switching to narrow viewing angle mode but also optimizes the light collection effect of narrow viewing angle and the astigmatism effect of wide viewing angle, thus achieving a better balance between wide and narrow viewing angle display quality.

[0047] Optionally, the first viewing angle control electrode 111 and the second viewing angle control electrode 112 are slit electrodes that cover the entire surface of the first substrate 11, meaning that the first viewing angle control electrode 111 and the second viewing angle control electrode 112 continuously cover the entire surface of the first substrate 11. Similarly, the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122 are slit electrodes that cover the entire surface of the second substrate 12, meaning that the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122 continuously cover the entire surface of the second substrate 12. The first viewing angle control electrode 111 and the second viewing angle control electrode 112 are located in different layers and are separated from each other by an insulating layer, thereby avoiding short circuits between the first viewing angle control electrode 111 and the second viewing angle control electrode 112, and simultaneously reducing the gap between the first electrode strip 111a and the second electrode strip 112a. The third-view control electrode 121 and the fourth-view control electrode 122 are located on different layers and separated from each other by an insulating layer, thereby avoiding short circuits between them and reducing the gap between the third electrode strip 121a and the fourth electrode strip 122a. Figure 2 and 3As shown, the first view control electrode 111 further includes a first wire 111b, which conductively connects multiple first electrode strips 111a; the second view control electrode 112 further includes a second wire 121b, which conductively connects multiple second electrode strips 112a; the third view control electrode 121 further includes a third wire 121b, which conductively connects multiple third electrode strips 121a; and the fourth view control electrode 122 further includes a fourth wire 122b, which conductively connects multiple fourth electrode strips 122a. The number of first wires 111b, second wires 121b, third wires 121b, and fourth wires 122b are all multiple to reduce the resistance of the first view control electrode 111, second view control electrode 112, third view control electrode 121, and fourth view control electrode 122. The extension directions of the first conductor 111b and the first electrode strip 111a are perpendicular to each other; the extension directions of the second conductor 121b and the second electrode strip 112a are perpendicular to each other; the extension directions of the third conductor 121b and the third electrode strip 121a are perpendicular to each other; and the extension directions of the fourth conductor 122b and the fourth electrode strip 122a are perpendicular to each other. Alternatively, in other embodiments, the first viewing angle control electrode 111 and the second viewing angle control electrode 112 may be located on the same layer and insulated from each other. In this case, the first conductor 111b and the second conductor 121b need to be placed in the non-display area at the edge of the display panel; similarly, the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122 may be located on the same layer and insulated from each other. In this case, the third conductor 121b and the fourth conductor 122b need to be placed in the non-display area at the edge of the display panel. The widths a1 and a2 of the first electrode strip 111a and the second electrode strip 112a are 3–10 μm, for example, 4.5 μm; the distance d1 between the first electrode strip 111a and the second electrode strip 112a is 0–3 μm, for example, 2 μm. The widths a3 and a4 of the third electrode strip 121a and the fourth electrode strip 122a are 3–10 μm, for example, 4.5 μm; the distance d2 between the third electrode strip 121a and the fourth electrode strip 122a is 0–3 μm, for example, 2 μm. With these numerical settings, more vertical electric fields can be formed at narrow viewing angles to improve the narrow viewing angle effect; simultaneously, at wide viewing angles, more horizontal electric fields can be formed, making the liquid crystal molecules more dispersed and improving the astigmatism effect at wide viewing angles.

[0048] The display liquid crystal cell 20 includes a color filter substrate 21, an array substrate 22 disposed opposite to the color filter substrate 21, and a second liquid crystal layer 23 located between the color filter substrate 21 and the array substrate 22. Preferably, the second liquid crystal layer 23 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. Figure 1As shown, in the initial state, the positive liquid crystal molecules in the second liquid crystal layer 23 are aligned parallel to the color filter substrate 21 and the array substrate 22. The alignment direction of the positive liquid crystal molecules near the color filter substrate 21 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules near the array substrate 22. In other embodiments, the array substrate 22 and the first substrate 11 may share a single substrate to reduce the cell thickness of the display panel.

[0049] The color filter substrate 21 has color resist layers 212 arranged in an array and black matrix 211 separating the color resist layers 212. The color resist layers 212 include color resist materials of red (R), green (G) and blue (B) colors, and correspondingly form sub-pixels of red (R), green (G) and blue (B) colors.

[0050] The array substrate 22 has multiple pixel units SP defined by multiple scan lines and multiple data lines that are mutually insulated and intersecting on the side facing the second liquid crystal layer 23. Each pixel unit SP has a pixel electrode 222 and a thin-film transistor. The pixel electrode 222 is electrically connected to the data line of the adjacent thin-film transistor through the thin-film transistor. The thin-film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan line are located on the same layer and are electrically connected. The gate and the active layer are isolated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 222 through a contact hole.

[0051] like Figure 1 As shown, in this embodiment, a common electrode 221 is further provided on the side of the array substrate 22 facing the second liquid crystal layer 23. The common electrode 221 and the pixel electrode 222 are located on different layers and are insulated from each other by an insulating layer. The common electrode 221 can be located above or below the pixel electrode 222. Figure 1 The diagram shows the common electrode 221 located below the pixel electrode 222. Preferably, the common electrode 221 is a planar electrode with its entire surface, and the pixel electrode 222 is a slit electrode with multiple electrode strips in each pixel unit SP to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located on the same layer, but they are insulated from each other. Each of the pixel electrode 222 and the common electrode 221 may include multiple electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are arranged alternately to form an in-plane switching (IPS) mode; or, in other embodiments, the array substrate 22 has a pixel electrode 222 on the side facing the second liquid crystal layer 23, and the color filter substrate 21 has a common electrode 221 on the side facing the second liquid crystal layer 23 to form a TN mode or a VA mode. For further descriptions of the TN mode and VA mode, please refer to the prior art, which will not be repeated here.

[0052] The first substrate 11, the second substrate 12, the color filter substrate 21, and the array substrate 22 can be made of materials such as glass, acrylic, and polycarbonate. The first viewing angle control electrode 111, the second viewing angle control electrode 112, the third viewing angle control electrode 121, the fourth viewing angle control electrode 122, the common electrode 221, and the pixel electrode 222 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0053] This application also provides a display device, including a backlight module 40 and a display panel as described above. The backlight module 40 is disposed on the side of the dimming box 10 away from the display liquid crystal cell 20. Since the dimming box 10 has a light-gathering effect at narrow viewing angles, the backlight module 40 only needs to be a conventional diffused backlight module; however, a light-gathering backlight module can also be used. The backlight module 40 can be an edge-lit backlight module or a collimated backlight module.

[0054] This embodiment also provides a driving method for a display panel, used to drive the display panel described above. The driving method includes: A first voltage signal V1 is applied to the first view control electrode 111, a second voltage signal V2 is applied to the second view control electrode 112, a third voltage signal V3 is applied to the third view control electrode 121, and a fourth voltage signal V4 is applied to the fourth view control electrode 122. By applying corresponding viewing angle control voltages to the first viewing angle control electrode 111, the second viewing angle control electrode 112, the third viewing angle control electrode 121, and the fourth viewing angle control electrode 122, the liquid crystal molecules in the first liquid crystal layer 13 are tilted. Combined with the first polarizer 31 and the second polarizer 32 whose light transmission axes are parallel to each other, they have a light-gathering effect and reduce the viewing angle range to achieve a privacy protection effect. Alternatively, the liquid crystal molecules in the first liquid crystal layer 13 near the first substrate 11 are in a disordered and scattered state and have a light-scattering effect; the liquid crystal molecules in the first liquid crystal layer 13 near the second substrate 12 are in a disordered and scattered state and have a light-scattering effect; or all the liquid crystal molecules in the first liquid crystal layer 13 are in a disordered and scattered state and have a light-scattering effect. Through the light scattering effect of the dimming box 10, the viewing angle range is expanded to achieve a wide viewing angle effect.

[0055] Figure 5 This is a waveform diagram of the viewing angle control signal of the display device in narrow viewing angle mode in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the cross-sectional structure of the display device in the narrow viewing angle mode in the fourth direction according to Embodiment 1 of the present invention. Figure 7 This is a schematic diagram of the third-direction cross-sectional structure of the dimming box in narrow viewing angle mode according to Embodiment 1 of the present invention. Figures 5 to 7As shown, in narrow viewing angle mode, the liquid crystal molecules in the first liquid crystal layer 13 are tilted. Specifically, the first voltage signal V1 and the second voltage signal V2 are the same common voltage signal, and the third voltage signal V3 and the fourth voltage signal V4 are the same AC voltage signal (e.g., ±3V). There is a first voltage difference (e.g., 3V) between the third voltage signal V3 and the common voltage signal, and between the fourth voltage signal V4 and the common voltage signal. The first voltage difference is greater than or equal to a first preset value (e.g., 2.6V), causing the liquid crystal molecules in the first liquid crystal layer 13 to tilt and have a light-gathering effect. A strong vertical electric field is formed between the first substrate 11 and the second substrate 12. Figure 6 and Figure 7 The positive liquid crystal molecules in the first liquid crystal layer 13 are tilted (E2), which has a light-absorbing effect and narrows the viewing angle range to achieve a privacy protection effect. Since the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 89°, the pretilt angle of the first liquid crystal layer 13 gradually decreases from the second substrate 12 toward the first substrate 11, resulting in a faster response speed when switching to the narrow viewing angle mode.

[0056]

[0057] Figure 8 This is a simulation comparison diagram of the effects of dimming boxes with different thicknesses in narrow viewing angle mode in Embodiment 1 of the present invention. Figure 8 N1, N2, N3, and N4 are the simulated light collection curves for cell gap thicknesses of 8µm, 10µm, 12µm, and 15µm, respectively. Figure 8 As shown in Table 1 above, a narrow viewing angle with a box thickness of 12µm provides better viewing effect at a 45° field of view.

[0058] Figure 9 This is a simulation comparison table of color shift in the horizontal direction for dimming boxes of different thicknesses in narrow viewing angle mode according to Embodiment 1 of the present invention. Figure 10 This is a simulated comparison table of color shift in the vertical direction of dimming boxes with different thicknesses in narrow viewing angle mode according to Embodiment 1 of the present invention. Figure 9 and Figure 10 The solid and dashed curves are color shift simulation curves for cell gaps of 8µm and 11µm, respectively. At narrow viewing angles, the color shift is smaller with a cell gap of 11µm, meaning that the display quality is better at narrow viewing angles.

[0059] Figure 11 This is a waveform diagram of the viewing angle control signal of the display device in the first wide viewing angle mode in Embodiment 1 of the present invention. Figure 12 This is a schematic cross-sectional view of the display device in the first wide viewing angle mode of the present invention in the fourth direction. (See attached diagram.) Figure 11 and Figure 12As shown, in the first wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer 13 near the first substrate 11 are in a disordered and scattered state and have a light-scattering effect. Specifically, the first voltage signal V1 and the second voltage signal V2 are AC voltage signals with opposite polarities (e.g., ±5V) and have a second voltage difference (e.g., 10V). The third voltage signal V3 and the fourth voltage signal V4 are the same common voltage signal. The second voltage difference is greater than a second preset value (e.g., 10V). At this time, a strong horizontal electric field will be formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 112, and the first viewing angle control electrode 111 and the second viewing angle control electrode 112 will each interact with the third viewing angle control electrode 121 and the second viewing angle control electrode 112. A strong vertical electric field is formed between the four-view control electrodes 122. Under the action of the vertical and horizontal electric fields, the positive liquid crystal molecules can be driven to deflect in the horizontal and vertical directions in a preset direction, so that the liquid crystal molecules in the first liquid crystal layer 13 are in a disordered and scattered state. The liquid crystal molecules in the first liquid crystal layer 13 closer to the first substrate 11 are more disordered and scattered and have a better light-scattering effect. At this time, the refractive index of liquid crystal molecules with different tilt angles is different, with a refractive index of no to ne, and has a light-scattering effect to achieve the first wide viewing angle effect.

[0060] Figure 13 This is a waveform diagram of the viewing angle control signal of the display device in the second wide viewing angle mode in Embodiment 1 of the present invention. Figure 14 This is a schematic cross-sectional view of the display device in the second wide viewing angle mode in the fourth direction according to Embodiment 1 of the present invention. Figure 13 and Figure 14 As shown, in the second wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer 13 near the second substrate 12 are in a disordered and scattered state and have a light-scattering effect. Specifically, the first voltage signal V1 and the second voltage signal V2 are the same common voltage signal, and the third voltage signal V3 and the fourth voltage signal V4 are AC voltage signals with opposite polarities (e.g., ±5V) and have a second voltage difference (e.g., 10V). The second voltage difference is greater than a second preset value (e.g., 10V). At this time, a strong horizontal electric field will be formed between the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122, and the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122 will each interact with the first viewing angle control electrode 111 and the second viewing angle control electrode 122. A strong vertical electric field is formed between the two viewing angle control electrodes 112. Under the action of the vertical and horizontal electric fields, the positive liquid crystal molecules can be driven to deflect in the horizontal and vertical directions in a preset direction, so that the liquid crystal molecules in the first liquid crystal layer 13 are in a disordered and scattered state. Among them, the liquid crystal molecules on the side of the first liquid crystal layer 13 closer to the second substrate 12 are more disordered and scattered and have a better light-scattering effect. At this time, the refractive index of liquid crystal molecules with different tilt angles is different, with a refractive index of no to ne, and has a light-scattering effect to achieve the second wide viewing angle effect.

[0061] Figure 15 This is a waveform diagram of the viewing angle control signal of the display device in the third wide viewing angle mode in Embodiment 1 of the present invention. Figure 16 This is a schematic diagram of the cross-sectional structure of the display device in the third wide viewing angle mode in the fourth direction according to Embodiment 1 of the present invention. Figure 15 and Figure 16 As shown, in the third wide viewing angle mode, all liquid crystal molecules in the first liquid crystal layer 13 are in a disordered and scattered state and have a light-scattering effect. Specifically, the first voltage signal V1 and the second voltage signal V2 are AC voltage signals with opposite polarities (e.g., ±5V) and have a second voltage difference (e.g., 10V), and the third voltage signal V3 and the fourth voltage signal V4 are AC voltage signals with opposite polarities (e.g., ±5V) and have a second voltage difference (e.g., 10V). The second voltage difference is greater than a second preset value (e.g., 10V). At this time, a strong horizontal electric field will be formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 112, and between the third viewing angle control electrode 121 and the fourth viewing angle control electrode 122. Moreover, the first base A strong vertical electric field is formed between plate 11 and the second substrate 12. Under the action of the vertical and horizontal electric fields, the positive liquid crystal molecules can be driven to deflect in the horizontal and vertical directions in a preset direction, making the liquid crystal molecules in the first liquid crystal layer 13 more disordered and scattered. Specifically, the liquid crystal molecules on the side of the first liquid crystal layer 13 closest to the first substrate 11 and the side closest to the second substrate 12 are more disordered and scattered, resulting in better light scattering. At this time, the refractive index of the liquid crystal molecules at different tilt angles is different, ranging from no to ne, and they also have a light scattering effect, thus achieving a third wide viewing angle effect. Because the liquid crystal molecules on the side of the first liquid crystal layer 13 closest to the first substrate 11 and the side closest to the second substrate 12 are in a more disordered and scattered state, they have a better light scattering effect, resulting in a better wide viewing angle effect. Optionally, the first voltage signal V1 and the third voltage signal V3 are AC voltage signals with the same polarity (e.g., ±5V), and the second voltage signal V2 and the fourth voltage signal V4 are AC voltage signals with the same polarity (e.g., ±5V).

[0062] Figure 17 This is a waveform diagram of the viewing angle control signal of the display device in the third wide viewing angle mode in another embodiment of the present invention. Of course, in another embodiment, such as... Figure 17 As shown, in the third wide-view mode, the first voltage signal V1 and the fourth voltage signal V4 can be AC ​​voltage signals with the same polarity (e.g., ±5V), and the second voltage signal V2 and the third voltage signal V3 can be AC ​​voltage signals with the same polarity (e.g., ±5V).

[0063] In narrow viewing angle mode, first wide viewing angle mode, second wide viewing angle mode, and third wide viewing angle mode, the display liquid crystal cell 20 is used to control the display device to display a normal image. Specifically, a corresponding grayscale voltage is applied to the pixel electrode 222, forming a voltage difference and generating a horizontal electric field between the pixel electrode 222 and the common electrode 221. Figure 6 , Figure 12 , Figure 16 E1) causes positive liquid crystal molecules to deflect in the horizontal direction in a direction parallel to the horizontal electric field. The gray level voltage includes gray level voltages from 0 to 255. When different gray level voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightness, thereby displaying different images, so as to realize the normal display of the display device under wide and narrow viewing angles.

[0064] [Example 2] Figure 18 This is a schematic diagram of the display device in its initial state according to Embodiment 2 of the present invention. Figure 18 As shown, the display panel, display device, and driving method provided in Embodiment 2 of the present invention are the same as those in Embodiment 1. Figures 1 to 17 The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, the first liquid crystal layer 13 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The positive liquid crystal molecules have a Δn = ne - no, where Δn > 0. A larger Δn is more beneficial for light scattering at wide viewing angles. The range of Δn is 0.2 to 0.3, preferably Δn = 0.27. The optical path difference (Retardation) is > 700 nm. The thickness of the first liquid crystal layer 13 is 8 to 15 μm, for example, 11 μm. Figure 1 As shown, in the initial state, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 83° to 90°, and the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 0° to 7°. For example, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 89°, and the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 4.5°. That is, the initial pretilt angles of the first liquid crystal layer 13 near the first substrate 11 and near the second substrate 12 are approximately perpendicular. With this alignment method, not only can the response speed of switching between wide and narrow viewing angles be improved, but also, in the wide viewing angle mode, the liquid crystal molecules can be made more dispersed, thereby improving the astigmatism effect of the wide viewing angle.

[0065] In this embodiment, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is the first direction T1, and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is the second direction T2. ​​The first direction T1 and the second direction T2 are perpendicular to each other, thereby reducing the color shift of the display panel during display. Optionally, the transmission axis of the first polarizer 31 and the transmission axis of the second polarizer 32 are both parallel to the first direction T1, and the transmission axes of the first polarizer 31 and the second polarizer 32 are both perpendicular to the second direction T2. ​​The transmission axis of the third polarizer 33 is perpendicular to the first direction T1 and parallel to the second direction T2. ​​For example, the transmission axes of the first polarizer 31 and the second polarizer 32 are both 0°, the transmission axis of the third polarizer 33 is 90°, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is 0°, and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is 90°.

[0066] Optionally, the first electrode strip 111a, the second electrode strip 112a, the third electrode strip 121a, and the fourth electrode strip 122a are all along the fourth direction T4. Figure 2 and Figure 3 Extending outwards, the angle between the fourth direction T4 and the second direction T2 is 3° to 7°. For example, the transmission axis of the first polarizer 31 and the transmission axis of the second polarizer 32 are both 0°, the transmission axis of the third polarizer 33 is 90°, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 is 0°, the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is 90°, and the first electrode strip 111a, the second electrode strip 112a, the third electrode strip 121a and the fourth electrode strip 122a all extend in a direction of 83° to 87°.

[0067] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0068] [Example 3] Figure 19 This is a schematic diagram of the display device in its initial state according to Embodiment 3 of the present invention. Figure 20 This is a schematic diagram of the display device in the fourth wide viewing angle mode according to Embodiment 3 of the present invention. Figure 19 and Figure 20 As shown, the display panel, display device, and driving method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 1 to 17 Example 2 Figure 18 The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, the first liquid crystal layer 13 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The positive liquid crystal molecules have a Δn = ne - no, where Δn > 0. A larger Δn is more beneficial for light scattering at wide viewing angles. The range of Δn is 0.2 to 0.3, preferably Δn = 0.27. The optical path difference (Retardation) is > 700 nm. The thickness of the first liquid crystal layer 13 is 8 to 15 μm, for example, 11 μm. Figure 1 As shown, in the initial state, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 and the side near the second substrate 12 is both 0° to 7°, meaning that the positive liquid crystal molecules in the first liquid crystal layer 13 are approximately lying flat in the initial state. The alignment direction of the first liquid crystal layer 13 near the first substrate 11 is the first direction T1, and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 is the second direction T2. ​​The first direction T1 and the second direction T2 are parallel to each other, that is, the alignment direction of the first liquid crystal layer 13 near the first substrate 11 and the alignment direction of the first liquid crystal layer 13 near the second substrate 12 are parallel to each other.

[0069] The first substrate 11 has a first raised structure layer 113 on the side facing the first liquid crystal layer 13, and the refractive index of the first raised structure layer 113 is equal to no. It is necessary to match the transmission axes of the first polarizer 31 and the second polarizer 32 in Embodiment 1, both of which are 90°. The initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 4.5°, and its alignment direction is 90°. The initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is also 4.5°, and its alignment direction is 90°. Therefore, in the initial state, if... Figure 20 As shown, the refractive index of the first liquid crystal layer 13 is ne, and the refractive index of the first raised structure layer 113 is different from that of the first liquid crystal layer 13, thus having a light-scattering effect to achieve a fourth wide viewing angle effect. That is, the first viewing angle control electrode 111, the second viewing angle control electrode 112, the third viewing angle control electrode 121, and the fourth viewing angle control electrode 122 are also in wide viewing angle mode even without a voltage signal applied, thereby enabling the display device to achieve four wide viewing angle modes. Moreover, in the first wide viewing angle mode, the second wide viewing angle mode, and the third wide viewing angle mode, the refractive index of the first liquid crystal layer 13 is different from that of the first raised structure layer 113, thereby further enhancing the wide viewing angle effect of the first wide viewing angle mode, the second wide viewing angle mode, and the third wide viewing angle mode.

[0070] Figure 21 This is a schematic diagram of the display device in its initial state according to another embodiment of the present invention. Figure 21As shown, in another embodiment, the second substrate 12 may have a second raised structure layer 113 on the side facing the first liquid crystal layer 13, and the refractive index of the second raised structure layer 113 is equal to ne. This requires that the transmission axes of the first polarizer 31 and the second polarizer 32 in Embodiment 2 are both 0°, the initial pretilt angle of the first liquid crystal layer 13 near the first substrate 11 is 4.5°, and the alignment direction is 90°, and the initial pretilt angle of the first liquid crystal layer 13 near the second substrate 12 is 4.5°, and the alignment direction is 90°. Therefore, in the initial state, as... Figure 20 As shown, the refractive index of the first liquid crystal layer 13 is no, and the refractive index of the first protruding structure layer 113 is different from that of the first liquid crystal layer 13, thus having a light-scattering effect, that is, a wide viewing angle effect can be achieved without power supply.

[0071] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0072] Figure 22 and Figure 23 This is a schematic diagram of the planar structure of the display device in an embodiment of the present invention. Please refer to... Figure 22 and Figure 23 The display device is equipped with a viewing angle switching button 50, which allows the user to request a viewing angle switch from the display device. The viewing angle switching button 50 can be a physical button (such as...). Figure 22 As shown), it can also be used for software control or application programs (APP) to implement switching functions (such as... Figure 23 As shown, for example, the wide and narrow viewing angles can be set via a slider. When a user needs to switch between a wide and narrow viewing angle, they can send a viewing angle switching request to the display device by operating the viewing angle switching button 50. Ultimately, the driver chip 60 controls the electrical signals applied to the first viewing angle control electrode 111, the second viewing angle control electrode 112, the third viewing angle control electrode 121, and the fourth viewing angle control electrode 122. The display device can then switch between narrow viewing angle mode and various wide viewing angle modes. When switching to a narrow viewing angle, the driving method corresponding to the narrow viewing angle mode is used; when switching to a wide viewing angle, the driving method corresponding to the wide viewing angle mode is used. Therefore, the display device of this embodiment has strong operational flexibility and convenience, achieving a multi-functional display device that integrates entertainment video and privacy protection.

[0073] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A display panel, characterized in that, The device includes a dimming box (10), which includes a first substrate (11), a second substrate (12) disposed opposite to the first substrate (11), and a first liquid crystal layer (13) disposed between the first substrate (11) and the second substrate (12). The first substrate (11) has a first viewing angle control electrode (111) and a second viewing angle control electrode (112) on the side facing the first liquid crystal layer (13). The second substrate (12) has a third viewing angle control electrode (121) and a fourth viewing angle control electrode (122) on the side facing the first liquid crystal layer (13). The first viewing angle control electrode (111) includes a plurality of first electrode strips (111a), the second viewing angle control electrode (112) includes a plurality of second electrode strips (112a), the third viewing angle control electrode (121) includes a plurality of third electrode strips (121a), and the fourth viewing angle control electrode (122) includes a plurality of fourth electrode strips (122a). The projections of the first electrode strips (111a) and the second electrode strips (112a) on the first substrate (11) are parallel to each other and alternately arranged. The projections of the third electrode strips (121a) and the fourth electrode strips (122a) on the second substrate (12) are parallel to each other and alternately arranged. The first substrate (11) is provided with a first polarizer (31) and the second substrate (12) is provided with a second polarizer (32). The light transmission axis of the first polarizer (31) and the light transmission axis of the second polarizer (32) are parallel to each other. In the narrow viewing angle mode, the liquid crystal molecules in the first liquid crystal layer (13) are tilted and have a light-collecting effect; in the first wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer (13) near the first substrate (11) are in a disordered and scattered state and have a light-scattering effect; in the second wide viewing angle mode, the liquid crystal molecules in the first liquid crystal layer (13) near the second substrate (12) are in a disordered and scattered state and have a light-scattering effect; in the third wide viewing angle mode, all the liquid crystal molecules in the first liquid crystal layer (13) are in a disordered and scattered state and have a light-scattering effect.

2. The display panel according to claim 1, characterized in that, The alignment direction of the first liquid crystal layer (13) near the first substrate (11) is the first direction (T1), and the alignment direction of the first liquid crystal layer (13) near the second substrate (12) is the second direction (T2). The first direction (T1) and the second direction (T2) are perpendicular or parallel to each other.

3. The display panel according to claim 2, characterized in that, The transmission axis of the first polarizer (31) and the transmission axis of the second polarizer (32) are both perpendicular to the second direction (T2).

4. The display panel according to claim 2, characterized in that, The first liquid crystal layer (13) uses positive liquid crystal molecules. The initial pretilt angle of the first liquid crystal layer (13) near the first substrate (11) is 0° to 7°. The initial pretilt angle of the first liquid crystal layer (13) near the second substrate (12) is 83° to 90°. The first direction (T1) is 90° and the second direction (T2) is 0°. The transmission axis of the first polarizer (31) and the transmission axis of the second polarizer (32) are both 90°. The first electrode strip (111a), the second electrode strip (112a), the third electrode strip (121a) and the fourth electrode strip (122a) all extend along a third direction (T3), and the angle between the third direction (T3) and the first direction (T1) is 3° to 7°.

5. The display panel according to claim 2, characterized in that, The first liquid crystal layer (13) uses positive liquid crystal molecules. The initial pretilt angle of the first liquid crystal layer (13) near the first substrate (11) is 83° to 90°. The initial pretilt angle of the first liquid crystal layer (13) near the second substrate (12) is 0° to 7°. The first direction (T1) is 0° and the second direction (T2) is 90°. The transmission axis of the first polarizer (31) and the transmission axis of the second polarizer (32) are both 0°. The first electrode strip (111a), the second electrode strip (112a), the third electrode strip (121a) and the fourth electrode strip (122a) all extend along the fourth direction (T4), and the angle between the fourth direction (T4) and the second direction (T2) is 3° to 7°.

6. The display panel according to claim 2, characterized in that, The first liquid crystal layer (13) uses positive liquid crystal molecules. The initial pretilt angle of the first liquid crystal layer (13) near the first substrate (11) and near the second substrate (12) is 0° to 7°. The initial pretilt angle of the first liquid crystal layer (13) is 83° to 90°. The first direction (T1) is 90° and the second direction (T2) is 90°. The transmission axis of the first polarizer (31) and the transmission axis of the second polarizer (32) are both 90°. The first substrate (11) has a first raised structure layer (113) on the side facing the first liquid crystal layer (13), and the refractive index of the first raised structure layer (113) is equal to no.

7. The display panel according to claim 2, characterized in that, The first liquid crystal layer (13) uses positive liquid crystal molecules. The initial pretilt angle of the first liquid crystal layer (13) near the first substrate (11) and near the second substrate (12) is 0° to 7°. The initial pretilt angle of the first liquid crystal layer (13) is 83° to 90°. The first direction (T1) is 90° and the second direction (T2) is 90°. The transmission axis of the first polarizer (31) and the transmission axis of the second polarizer (32) are both 90°. The second substrate (12) has a second raised structure layer (113) on the side facing the first liquid crystal layer (13), and the refractive index of the second raised structure layer (113) is equal to ne.

8. The display panel according to any one of claims 1-7, characterized in that, The display panel includes a display liquid crystal cell (20) stacked on top of the dimming box (10). A third polarizer (33) is provided on the side of the display liquid crystal cell (20) away from the dimming box (10). The light transmission axis of the first polarizer (31) and the light transmission axis of the second polarizer (32) are both perpendicular to the light transmission axis of the third polarizer (33).

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

10. A driving method for a display panel, characterized in that, The driving method for driving the display panel as described in any one of claims 1-8 includes: A first voltage signal (V1) is applied to the first view control electrode (111), a second voltage signal (V2) is applied to the second view control electrode (112), a third voltage signal (V3) is applied to the third view control electrode (121), and a fourth voltage signal (V4) is applied to the fourth view control electrode (122). In the narrow viewing angle mode, the first voltage signal (V1) and the second voltage signal (V2) are the same common voltage signal, and the third voltage signal (V3) and the fourth voltage signal (V4) are the same AC voltage signal. There is a first voltage difference between the third voltage signal (V3) and the common voltage signal, and between the fourth voltage signal (V4) and the common voltage signal. The first voltage difference is greater than or equal to a first preset value, so that the liquid crystal molecules in the first liquid crystal layer (13) are tilted and have a light-collecting function. In the first wide viewing angle mode, the first voltage signal (V1) and the second voltage signal (V2) are AC voltage signals with opposite polarities and have a second voltage difference. The third voltage signal (V3) and the fourth voltage signal (V4) are the same common voltage signal. The second voltage difference is greater than a second preset value, so that the liquid crystal molecules in the first liquid crystal layer (13) near the first substrate (11) are in a disordered and scattered state and have a light-scattering effect. In the second wide viewing angle mode, the first voltage signal (V1) and the second voltage signal (V2) are the same common voltage signal, the third voltage signal (V3) and the fourth voltage signal (V4) are AC voltage signals with opposite polarities and have a second voltage difference. The second voltage difference is greater than a second preset value, so that the liquid crystal molecules in the first liquid crystal layer (13) near the second substrate (12) are in a disordered and scattered state and have a light-scattering effect. In the third wide viewing angle mode, the first voltage signal (V1) and the second voltage signal (V2) are AC voltage signals with opposite polarities and have a second voltage difference, the third voltage signal (V3) and the fourth voltage signal (V4) are AC voltage signals with opposite polarities and have a second voltage difference. The second voltage difference is greater than a second preset value, so that all liquid crystal molecules in the first liquid crystal layer (13) are in a disordered and scattered state and have a light-scattering effect.

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