Display panel, display device and driving method

Abstract

A display panel, a display device, and a driving method. The display panel includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell includes a first substrate, a second substrate, and a dye liquid crystal layer. A viewing angle assisting electrode is provided on the first substrate, and a viewing angle control electrode is provided on the second substrate. The second liquid crystal cell includes a color filter substrate, an array substrate, and a liquid crystal layer. A reflective polarizer is provided on a side of the second liquid crystal cell away from the first liquid crystal cell. A prism structure layer with a light scattering effect is provided in the first liquid crystal cell and / or the second liquid crystal cell. By providing the prism structure layer with a light scattering effect and collocating the reflective polarizer on the side of the second liquid crystal cell away from the first liquid crystal cell, while improving the wide viewing angle effect, good display brightness is ensured. Moreover, dye liquid crystal is used in the first liquid crystal cell to reduce the influence of the prism structure layer on the narrow viewing angle effect and improve the narrow viewing angle effect, so that when the wide viewing angle effect is improved, the narrow viewing angle effect is not affected or is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and in particular to a display panel, a display device, and a driving method. Background Art

[0002] With the continuous progress of liquid crystal display technology, the viewing angle of a display has been widened from about 120° to more than 160°. While people enjoy the visual experience brought by a large viewing angle, they also hope to effectively protect business secrets and personal privacy to avoid commercial losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the requirement for a wide viewing angle, in many cases, a display device is also required to have the function of switching between a wide viewing angle and a narrow viewing angle.

[0003] Currently, mainly by attaching a louvered shielding film to the display screen to achieve the switching between a wide viewing angle and a narrow viewing angle. When anti-peeping is required, the louvered shielding film is used to cover the screen to narrow the viewing angle. However, this method requires an additional preparation of a louvered shielding film, which causes great inconvenience to users. Moreover, a single louvered shielding film can only achieve one viewing angle. Once the louvered shielding film is attached, the viewing angle is fixed in the narrow viewing angle mode, resulting in the inability to freely switch between the wide viewing angle mode and the narrow viewing angle mode. In addition, the anti-peeping film will cause a reduction in brightness, affecting the quality.

[0004] Technical problem

[0005] The prior art also has a dual-cell structure that uses a dimming cell and a display panel to switch between a wide viewing angle and a narrow viewing angle. Among them, the display panel is used for normal image display, and the dimming cell is used to control the viewing angle switching. The dimming cell includes an upper substrate, a lower substrate, and a liquid crystal layer between the upper substrate and the lower substrate. The viewing angle control electrodes on the upper substrate and the lower substrate apply a vertical electric field to the liquid crystal molecules, causing the liquid crystal to deflect in the vertical direction to achieve the narrow viewing angle mode. By controlling the voltage on the viewing angle control electrodes, the switching between the wide viewing angle and the narrow viewing angle can be realized. This display panel uses a large viewing angle to collect light to reduce the brightness to achieve narrow viewing angle display. However, for this display panel with switchable wide and narrow viewing angles, when displaying in a wide viewing angle, the ratio of the display brightness at 45° on the left and right to the display brightness at the center (0°) is about 1%, and the large viewing angle display effect in the wide viewing angle is poor. Moreover, in the prior art, when improving the display effect of the wide viewing angle, the narrow viewing angle effect will become worse; or when improving the display effect of the narrow viewing angle, the display effect of the wide viewing angle will become worse. It is difficult to achieve improving the display effect of the wide viewing angle without affecting or improving the display effect of the narrow viewing angle.

[0006] Technical solution

[0007] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide a display panel, a display device and a driving method, so as to solve the problem in the prior art that it is impossible to improve the display effect of a narrow viewing angle without affecting or improving the display effect of a wide viewing angle.

[0008] The purpose of the present invention is achieved by the following technical solutions:

[0009] The present invention provides a display panel, including a first liquid crystal cell and a second liquid crystal cell which are stacked on top of each other, and the first liquid crystal cell is arranged on the light-emitting side of the second liquid crystal cell;

[0010] The first liquid crystal cell includes a first substrate, a second substrate disposed opposite to the first substrate, and a dye liquid crystal layer located between the first substrate and the second substrate. A viewing angle auxiliary electrode is provided on the first substrate, and a viewing angle control electrode cooperating with the viewing angle auxiliary electrode is provided on the second substrate;

[0011] The second liquid crystal cell includes a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer provided between the color filter substrate and the array substrate;

[0012] A first polarizer is provided on the side of the second liquid crystal cell away from the first liquid crystal cell, and a second polarizer is provided on the side of the second liquid crystal cell close to the first liquid crystal cell. The transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizer. The first polarizer is a reflective polarizer, and a prism structure layer is provided in the first liquid crystal cell and / or the second liquid crystal cell, and the prism structure layer has a light scattering effect on the backlight.

[0013] Further, the second polarizer is a reflective polarizer; and / or a transmissive-reflective layer is provided between the second polarizer and the first liquid crystal cell.

[0014] Further, the first liquid crystal cell has a marked pattern area and a non-marked pattern area. The viewing angle control electrode includes a first viewing angle control electrode corresponding to the marked pattern area and a second viewing angle control electrode corresponding to the non-marked pattern area. The first viewing angle control electrode and the second viewing angle control electrode are insulated from each other and spaced apart;

[0015] In the marked display mode, narrow viewing angle signals with different amplitudes are respectively applied to the first viewing angle control electrode and the second viewing angle control electrode.

[0016] Further, the first viewing angle control electrode and the second viewing angle control electrode are located on the same layer, or the first viewing angle control electrode and the second viewing angle control electrode are located on different layers.

[0017] Further, a plurality of first scan lines and a plurality of first data lines are provided on the array substrate. The plurality of first scan lines and the plurality of first data lines are insulated and cross each other to define a plurality of pixel units. The array substrate is provided with a pixel electrode and a first thin film transistor in each pixel unit. The pixel electrode is electrically connected to the first scan line and the first data line adjacent to the first thin film transistor through the first thin film transistor;

[0018] A plurality of second scan lines and a plurality of second data lines are provided on the second substrate. The second scan lines correspond to the first scan lines, and the second data lines correspond to the first data lines. The viewing angle control electrode includes a plurality of electrode blocks corresponding to the pixel units. The second substrate is provided with a second thin film transistor in each pixel unit. The electrode block is electrically connected to the second scan line and the second data line adjacent to the second thin film transistor through the second thin film transistor;

[0019] The first liquid crystal cell has an identification pattern area and a non-identification pattern area. In the identification display mode, the electrode blocks corresponding to the identification pattern area and the electrode blocks corresponding to the non-identification pattern area are respectively applied with narrow viewing angle signals with different amplitudes.

[0020] Further, a third polarizer is provided on a side of the first liquid crystal cell away from the second liquid crystal cell. The transmission axis of the third polarizer is parallel to the transmission axis of the second polarizer.

[0021] Further, a transflective layer is provided between the second polarizer and the first liquid crystal cell, and the transflective layer is a one-way perspective film. The dye liquid crystal layer is aligned parallel to the first substrate and the second substrate, and the alignment direction of the dye liquid crystal layer is parallel to the transmission axis of the third polarizer;

[0022] A plurality of first scan lines and a plurality of first data lines are provided on the array substrate. The plurality of first scan lines and the plurality of first data lines are insulated and cross each other to define a plurality of pixel units. The array substrate is provided with a pixel electrode and a first thin film transistor in each pixel unit. The pixel electrode is electrically connected to the first scan line and the first data line adjacent to the first thin film transistor through the first thin film transistor;

[0023] A plurality of second scan lines and a plurality of second data lines are provided on the second substrate. The second scan lines correspond to the first scan lines, and the second data lines correspond to the first data lines. The viewing angle control electrode includes a plurality of electrode blocks corresponding to the pixel units. The second substrate is provided with a second thin film transistor in each pixel unit. The electrode block is electrically connected to the second scan line and the second data line adjacent to the second thin film transistor through the second thin film transistor;

[0024] In the reflective display mode, corresponding gray-scale voltages are respectively applied to the electrode blocks.

[0025] Furthermore, in the regions corresponding to the pixel units, both the first substrate and the second substrate are colorless and transparent structures.

[0026] Furthermore, on one side of the first substrate and / or the second substrate facing the dye liquid crystal layer, there are provided bosses corresponding to the display area of the display panel.

[0027] Furthermore, the prism structure layer is disposed on one side of the second substrate facing the dye liquid crystal layer, and / or the prism structure layer is disposed on one side of the array substrate facing the liquid crystal layer.

[0028] The present application further provides a display device, including a backlight module and the display panel as described above, and the display panel is disposed on the light-emitting side of the backlight module.

[0029] The present application further provides a driving method for driving the display panel as described above, and the driving method includes:

[0030] In the wide viewing angle mode, a common signal is applied to the viewing angle auxiliary electrode, and a wide viewing angle signal is applied to the viewing angle control electrode to control the liquid crystal molecules and dye molecules in the dye liquid crystal layer to be in a standing posture;

[0031] In the narrow viewing angle mode, a common signal is applied to the viewing angle auxiliary electrode, and a narrow viewing angle signal is applied to the viewing angle control electrode to control the liquid crystal molecules and dye molecules in the dye liquid crystal layer to be in an inclined posture.

[0032] Furthermore, the second polarizer is a reflective polarizer, and / or a transflective layer is provided between the second polarizer and the first liquid crystal cell;

[0033] The first liquid crystal cell has an identification pattern area and a non-identification pattern area. The viewing angle control electrode includes a first viewing angle control electrode corresponding to the identification pattern area and a second viewing angle control electrode corresponding to the non-identification pattern area. The first viewing angle control electrode and the second viewing angle control electrode are insulated from each other and spaced apart;

[0034] In the identification display mode, a common signal is applied to the viewing angle auxiliary electrode, a first narrow viewing angle signal is applied to the first viewing angle control electrode, and a second narrow viewing angle signal is applied to the second viewing angle control electrode. The amplitudes of the first narrow viewing angle signal and the second narrow viewing angle signal are different to control the liquid crystal molecules and dye molecules corresponding to the identification pattern area to be in a first inclined posture, and to control the liquid crystal molecules and dye molecules corresponding to the non-identification pattern area to be in a second inclined posture.

[0035] Further, the second polarizer is a reflective polarizer, and / or a transmissive-reflective layer is provided between the second polarizer and the first liquid crystal cell;

[0036] The first liquid crystal cell has an identification pattern area and a non-identification pattern area, and the viewing angle control electrode includes a plurality of electrode blocks corresponding to pixel units;

[0037] In the identification display mode, a common signal is applied to the viewing angle auxiliary electrode, a first narrow viewing angle signal is applied to the electrode block corresponding to the identification pattern area, and a second narrow viewing angle signal is applied to the electrode block corresponding to the non-identification pattern area. The amplitudes of the first narrow viewing angle signal and the second narrow viewing angle signal are different, so as to control the liquid crystal molecules and dye molecules corresponding to the identification pattern area to be in a first inclined posture, and control the liquid crystal molecules and dye molecules corresponding to the non-identification pattern area to be in a second inclined posture.

[0038] Further, a transmissive-reflective layer is provided between the second polarizer and the first liquid crystal cell, and the transmissive-reflective layer is a one-way transparent film;

[0039] A third polarizer is provided on a side of the first liquid crystal cell away from the second liquid crystal cell. The transmission axis of the third polarizer is parallel to the transmission axis of the second polarizer. The dye liquid crystal layer is aligned parallel to the first substrate and the second substrate, and the alignment direction of the dye liquid crystal layer is parallel to the transmission axis of the third polarizer. The viewing angle control electrode includes a plurality of electrode blocks corresponding to pixel units;

[0040] In the reflective display mode, the backlight module and the second liquid crystal cell are turned off, a common signal is applied to the viewing angle auxiliary electrode, and corresponding gray-scale voltages are applied to the respective electrode blocks.

[0041] Advantageous effects

[0042] By providing a prism structure layer with a light scattering effect and cooperating with a reflective polarizer provided on a side of the second liquid crystal cell away from the first liquid crystal cell, while improving the wide viewing angle effect, it is ensured that there is better wide viewing angle display brightness; moreover, dye liquid crystal is used in the first liquid crystal cell, and the dye liquid crystal has a certain light absorption effect at a narrow viewing angle, so as to reduce the influence of the prism structure layer on the narrow viewing angle effect and improve the narrow viewing angle effect. Through the mutual cooperation of the prism structure layer, the reflective polarizer and the dye liquid crystal, it is realized that when the wide viewing angle effect is improved, the narrow viewing angle effect is not affected or improved. Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of the display device in the initial state in the first embodiment of the present invention.

[0044] Figure 2 It is a schematic plan view of an array substrate in the first embodiment of the present invention.

[0045] Figure 3 It is a waveform diagram of a driving signal of a display device in the first embodiment of the present invention.

[0046] Figure 4 It is a schematic structural view of a display device in a wide viewing angle mode in the first embodiment of the present invention.

[0047] Figure 5 It is a schematic structural view of a display device in a narrow viewing angle mode in the first embodiment of the present invention.

[0048] Figure 6 It is a simulation diagram of the viewing angle and contrast of dye molecules with different doping ratios in a first liquid crystal cell in a wide viewing angle mode in the first embodiment of the present invention.

[0049] Figure 7 It is a simulation diagram of the viewing angle and contrast of dye molecules with different doping ratios in a first liquid crystal cell in a narrow viewing angle mode in the first embodiment of the present invention.

[0050] Figure 8 It is a measured diagram of the viewing angle and light transmittance of different dye molecule doping ratios in a first liquid crystal cell in a narrow viewing angle mode in the first embodiment of the present invention.

[0051] Figure 9 It is a schematic structural view of a display device in an initial state in the second embodiment of the present invention.

[0052] Figure 10 It is a schematic structural view of a display device in an initial state in the third embodiment of the present invention.

[0053] Figure 11 It is a schematic structural view of a display device in an initial state in the fourth embodiment of the present invention.

[0054] Figure 12 It is a schematic structural view of a display device in an initial state in the fifth embodiment of the present invention.

[0055] Figure 13 It is a schematic plan view of a display device in the fifth embodiment of the present invention.

[0056] Figure 14 It is a schematic plan view of a viewing angle control electrode in the fifth embodiment of the present invention.

[0057] Figure 15 It is a waveform diagram of a driving signal of a display device in the fifth embodiment of the present invention.

[0058] Figure 16 It is a schematic structural view of a display device in a wide viewing angle mode in the fifth embodiment of the present invention.

[0059] Figure 17 It is a schematic structural diagram of the display device in the narrow viewing angle mode in the fifth embodiment of the present invention.

[0060] Figure 18 It is a schematic structural diagram of the display device in the logo display mode in the fifth embodiment of the present invention.

[0061] Figure 19 It is a schematic structural diagram of the display device in the initial state in the sixth embodiment of the present invention.

[0062] Figure 20 It is a schematic plan view of the second substrate in the sixth embodiment of the present invention.

[0063] Figure 21 It is a schematic structural diagram of the display device in the wide viewing angle mode in the sixth embodiment of the present invention.

[0064] Figure 22 It is a schematic structural diagram of the display device in the narrow viewing angle mode in the sixth embodiment of the present invention.

[0065] Figure 23 It is a schematic structural diagram of the display device in the logo display mode in the sixth embodiment of the present invention.

[0066] Figure 24 It is a schematic plan view of the display device in the logo display mode in the sixth embodiment of the present invention.

[0067] Figure 25 It is a schematic structural diagram of the display device in the reflection display mode in the sixth embodiment of the present invention.

[0068] Figure 26 It is one of the schematic plan views of the display device in the present invention.

[0069] Figure 27 It is the second of the schematic plan views of the display device in the present invention.

[0070] Embodiments of the present invention

[0071] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects of the display panel, display device, and driving method proposed according to the present invention as follows:

[0072] [Embodiment 1]

[0073] Figure 1 It is a schematic structural diagram of the display device in the initial state in the first embodiment of the present invention. Figure 2 It is a schematic plan view of the array substrate in the first embodiment of the present invention. AsFigure 1 and Figure 2 As shown in Figure 2 , a display panel provided in Embodiment 1 of the present invention includes a first liquid crystal cell 10 and a second liquid crystal cell 20 which are stacked on top of each other. The first liquid crystal cell 10 is disposed on the light-emitting side of the second liquid crystal cell 20, that is, the first liquid crystal cell 10 is disposed on the side of the second liquid crystal cell 20 away from the backlight module 50.

[0074] The first liquid crystal cell 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a dye liquid crystal layer 13 located between the first substrate 11 and the second substrate 12. A viewing angle assisting electrode 111 is provided on the first substrate 11, and a viewing angle control electrode 121 cooperating with the viewing angle assisting electrode 111 is provided on the second substrate 12. By controlling the voltages applied to the viewing angle assisting electrode 111 and the viewing angle control electrode 121, the first liquid crystal cell 10 is controlled to switch between a wide viewing angle and a narrow viewing angle. In this embodiment, both the viewing angle assisting electrode 111 and the viewing angle control electrode 121 are planar electrodes provided over the entire surface, so that all regions of the display device can be controlled to switch between a wide viewing angle and a narrow viewing angle simultaneously.

[0075] Further, an insulating layer covering the viewing angle assisting electrode 111 is provided on the first substrate 11, and / or an insulating layer covering the viewing angle control electrode 121 is provided on the second substrate 12 to avoid the problem of short circuit between the viewing angle assisting electrode 111 and the viewing angle control electrode 121.

[0076] The optical path difference Δn*d of the dye liquid crystal layer 13 is 700 - 1500 nm, for example, 1393 nm. The dye liquid crystal layer 13 includes liquid crystal molecules 131 and dye molecules 132 which are mixed with each other. The liquid crystal molecules 131 are positive liquid crystal molecules (liquid crystal molecules with positive dielectric anisotropy). The dye molecules 132 can be black dye molecules or purple-black dye molecules. The light absorption ability of the long axis of the dye molecules is greater than that of the short axis, that is, the dye molecules 132 have the characteristic that the light absorption ability of the long axis is strong and the light absorption ability of the short axis is very weak. As Figure 1As shown, in the initial state, the positive liquid crystal molecules and the dye molecules 132 are aligned parallel to the first substrate 11 and the second substrate 12. The alignment directions of the dye liquid crystal layer 13 on the side close to the first substrate 11 and on the side close to the second substrate 12 are parallel or antiparallel to each other. It can be understood that a first alignment layer is provided on the side of the first substrate 11 facing the dye liquid crystal layer 13, and a second alignment layer is provided on the side of the second substrate 12 facing the dye liquid crystal layer 13. The first alignment layer and the second alignment layer are used to align the dye liquid crystal layer 13, and the alignment directions of the first alignment layer and the second alignment layer are parallel to each other. Of course, the dye liquid crystal layer 13 may have a small pretilt angle (for example, less than 5°) during the initial alignment, that is, the liquid crystal molecules 131 and the dye molecules 132 form a small angle with the first substrate 11 and the second substrate 12 initially, which can accelerate the deflection of the positive liquid crystal molecules and the dye molecules 132 towards the vertical direction when switched to a narrow viewing angle.

[0077] The second liquid crystal cell 20 includes a color filter substrate 21, an array substrate 22 disposed opposite to the color filter substrate 21, and a liquid crystal layer 23 disposed between the color filter substrate 21 and the array substrate 22. In this embodiment, the liquid crystal molecules in the liquid crystal layer 23 also adopt positive liquid crystal molecules (liquid crystal molecules with positive dielectric anisotropy), such as Figure 1 As shown, in the initial state, the positive liquid crystal molecules are aligned parallel to the color filter substrate 21 and the array substrate 22. The alignment directions of the liquid crystal layer 23 on the side close to the color filter substrate 21 and on the side close to the array substrate 22 are parallel or antiparallel to each other. Of course, the liquid crystal molecules in the liquid crystal layer 23 may also adopt negative liquid crystal molecules (liquid crystal molecules with negative dielectric anisotropy).

[0078] The color filter substrate 21 is provided with color resist layers 212 arranged in an array and black matrices 211 that separate the color resist layers 212. The color resist layers 212 include color resist materials of three colors: red (R), green (G), and blue (B), and form sub-pixels of red (R), green (G), and blue (B) respectively, that is, the pixel unit SP has three colors: red (R), green (G), and blue (B).

[0079] Such as Figure 2As shown in the figure, a plurality of first scan lines 1 and a plurality of first data lines 2 are provided on the array substrate 22. The plurality of first scan lines 1 and the plurality of first data lines 2 are insulated and cross each other to define a plurality of pixel units SP. The array substrate 22 is provided with a pixel electrode 222 and a first thin film transistor 3 in each pixel unit SP. The pixel electrode 222 is electrically connected to the first scan line 1 and the first data line 2 adjacent to the first thin film transistor 3 through the first thin film transistor 3. Among them, the first thin film transistor 3 includes a gate, an active layer, a drain, and a source. The gate is located on the same layer as the first scan line 1 and is electrically connected. The gate and the active layer are separated by a gate insulating layer. The source is electrically connected to the first data line 2, and the drain is electrically connected to the pixel electrode 222.

[0080] As Figure 1 shown, a common electrode 221 is provided on the array substrate 22 to cooperate with the pixel electrode 222. The common electrode 221 and the pixel electrode 222 are located on different layers and are insulated from each other through an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 ( Figure 1 as shown in the figure, the common electrode 221 is located below the pixel electrode 222). In this embodiment, the common electrode 221 is a planar structure, and the pixel electrode 222 is a slit electrode having a plurality of 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. The pixel electrode 222 and the common electrode 221 may each include a plurality of electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are alternately arranged to form an In-Plane Switching (IPS) mode. Alternatively, the array substrate 22 is provided with a pixel electrode 222 on the side facing the liquid crystal layer 23, and the color filter substrate 21 is provided with a common electrode 221 on the side facing the liquid crystal layer 23 to form a TN display mode or a VA display mode. For other introductions of the TN display mode and the VA display mode, please refer to the prior art and will not be elaborated here.

[0081] Furthermore, a prism structure layer 40 is provided in the first liquid crystal cell 10 and / or the second liquid crystal cell 20, and the prism structure layer 40 has a light scattering effect on the backlight. In this embodiment, the prism structure layer 40 is provided on the side of the array substrate 22 facing the liquid crystal layer 23. The backlight emitted by the backlight module 50 passes through the prism structure layer 40 and is in a divergent state, thereby improving the wide viewing angle effect. Among them, the prism structure layer 40 includes a first refraction layer and a second refraction layer. The first refraction layer is provided with a convex structure, and the second refraction layer covers the first refraction layer. The longitudinal cross-section of the convex structure can be triangular, trapezoidal, semicircular, etc., and the convex structure is a columnar structure. The refractive index of the first refraction layer is less than that of the second refraction layer, so that after the backlight passes through the first refraction layer and the second refraction layer in sequence, it has a divergent effect.

[0082] As Figure 1 shown, a first polarizer 31 is provided on the side of the second liquid crystal cell 20 away from the first liquid crystal cell 10, and a second polarizer 32 is provided on the side of the second liquid crystal cell 20 close to the first liquid crystal cell 10. The transmission axis of the second polarizer 32 is perpendicular to the transmission axis of the first polarizer 31. Among them, the specular reflectance (SCI) of the first polarizer 31, which is a reflective polarizer (APF, Advanced Polarizer Film, full name: reflective polarizing ultra-thin optical film), can reach more than 46%. The reflective polarizer has a transmission axis and a reflective axis, and the transmission axis and the reflective axis of the reflective polarizer are perpendicular to each other. Since the prism structure layer 40 has a light scattering effect on the backlight, when the wide viewing angle is improved, the display brightness of the wide viewing angle will be reduced. By providing a reflective polarizer on the side of the second liquid crystal cell 20 away from the first liquid crystal cell 10, compared with a common polarizer, the utilization rate of the backlight can be increased to improve the display brightness of the wide viewing angle. With the mutual cooperation of the prism structure layer 40 and the reflective polarizer, while improving the wide viewing angle effect, it is ensured that there is better display brightness for the wide viewing angle.

[0083] Further, a transmissive and reflective layer 34 is provided between the second polarizer 32 and the first liquid crystal cell 10. In this embodiment, the transmissive and reflective layer 34 is a reflective polarizer (APF, Advanced Polarizer Film, full name: reflective ultra-thin optical film), so that the transmissive and reflective layer 34 has an axis for light transmission and reflection. As long as the polarization direction of the light is parallel to the transmission axis of the reflective polarizer, most of the light can pass through the reflective polarizer, thereby increasing the brightness of the transmitted backlight. Of course, in other embodiments, the transmissive and reflective layer 34 can also be a one-way perspective film. The one-way perspective film has no polarization effect on light. The backlight remains natural light after passing through the one-way perspective film, and the ambient light is still natural light after being reflected by the one-way perspective film. That is, regardless of the polarization direction of the light, the one-way perspective film has a transmission and reflection effect on it. Among them, the one-way perspective film (also called one-way film, mirror film, etc.) refers to a film that can make the glass have a high reflectivity to visible light when pasted on the glass. For example, when the outside is brighter than the inside, the one-way perspective film is similar to an ordinary mirror. The scenery inside the room cannot be seen from the outside, but the scenery outside the room can be clearly seen from the inside. The one-way perspective film is widely used in home glass film or car glass film. In the narrow viewing angle mode, since the transmitted backlight is darker at a large viewing angle, the golden ambient light reflected by the transmissive and reflective layer 34 can be seen, thereby improving the anti-peeping effect of the narrow viewing angle and achieving the golden anti-peeping effect.

[0084] In another embodiment, a viewing angle compensation film (not shown in the figure) or a composite film of the viewing angle compensation film and the reflective polarizer can also be provided between the second polarizer 32 and the first liquid crystal cell 10. The viewing angle compensation film has a certain light-gathering effect, thereby further improving the anti-peeping effect of the narrow viewing angle. Among them, the viewing angle compensation film can be compounded with the transmissive and reflective layer 34 into one layer, that is, the viewing angle compensation film and the transmissive and reflective layer 34 are bonded together in advance. Since the transmissive and reflective layer 34 is relatively thin, by bonding the viewing angle compensation film and the transmissive and reflective layer 34 together in advance, a certain thickness and strength can be improved, so as to facilitate bonding the viewing angle compensation film and the transmissive and reflective layer 34 between the second polarizer 32 and the first liquid crystal cell 10.

[0085] In this embodiment, a third polarizer 33 is provided on the side of the first liquid crystal cell 10 away from the second liquid crystal cell 20. The transmission axis of the third polarizer 33 is parallel to the transmission axis of the second polarizer 32, and the transmission axis of the third polarizer 33 is perpendicular to the alignment direction of the dye liquid crystal layer 13. For example, if the transmission axes of the third polarizer 33 and the second polarizer 32 are both 0°, then the alignment direction of the dye liquid crystal layer 13 is 90°, the transmission axis of the first polarizer 31 (reflective polarizer) is 90°, and the reflective axis of the first polarizer 31 is 0°.

[0086] Among them, 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 materials of the viewing angle auxiliary electrode 111, the viewing angle control electrode 121, the common electrode 221, and the pixel electrode 222 can be transparent materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0087] The present application also provides a display device, including a backlight module 50 and the display panel as described above. The display panel is disposed on the light-emitting side of the backlight module 50, and the backlight module 50 is used to provide a backlight source for the display panel. Among them, the backlight module 50 can adopt a collimated backlight module, a side-entry backlight module, or a light-gathering backlight module.

[0088] Figure 3 It is a driving signal waveform diagram of the display device in the first embodiment of the present invention. Figure 4 It is a schematic structural diagram of the display device in the first embodiment of the present invention in a wide viewing angle mode. Figure 5 It is a schematic structural diagram of the display device in the first embodiment of the present invention in a narrow viewing angle mode. As Figures 3 to 5 shown, the present application also provides a driving method, which is used to drive the display panel as described above. The driving method includes:

[0089] As Figure 3 and Figure 4 shown, in the wide viewing angle mode, the backlight module 50 is in an on state, a common signal Vcom is applied to the viewing angle auxiliary electrode 111, a wide viewing angle signal V1 is applied to the viewing angle control electrode 121, and there is a large voltage difference (such as 5-10V) between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, so that a strong vertical electric field ( Figure 4 E2 in) is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, controlling the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to deflect in the vertical direction and assume a standing posture to achieve a wide viewing angle effect.

[0090] During wide viewing angle display, a common voltage is applied to the common electrode 221, and a corresponding grayscale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 4 E1 in), and the positive liquid crystal molecules in the liquid crystal layer 23 deflect in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0-255 levels of grayscale voltage. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, so as to display different pictures at a wide viewing angle and achieve normal display of the display device at a wide viewing angle.

[0091] When in wide - viewing - angle display, by setting a prism structure layer 40 with astigmatic effect and by arranging a first polarizer 31 on the side of the second liquid - crystal cell 20 away from the first liquid - crystal cell 10, with the mutual cooperation of the prism structure layer 40 and the first polarizer 31, while improving the wide - viewing - angle effect, it is ensured that the display device has better wide - viewing - angle display brightness. When in wide - viewing - angle, since the liquid - crystal molecules 131 and dye molecules 132 in the dye - doped liquid - crystal layer 13 are in a standing posture, the dye molecules 132 basically do not absorb light. Therefore, the dye molecules 132 do not affect the display effect of the wide - viewing - angle. Moreover, when in wide - viewing - angle, whether it is a large viewing angle or a front - view angle (0°), the transmitted backlight is strong, which can cover the golden ambient light reflected by the transflective layer 34. Therefore, the golden ambient light reflected by the transflective layer 34 has basically no influence on the display in wide - viewing - angle.

[0092] As Figure 3 and Figure 5 shown, in the narrow - viewing - angle mode, the backlight module 50 is in the on - state. A common signal Vcom is applied to the viewing - angle auxiliary electrode 111, and a narrow - viewing - angle signal V2 is applied to the viewing - angle control electrode 121. There is a large voltage difference (such as 1.5 - 3V, preferably 2.7V) between the viewing - angle auxiliary electrode 111 and the viewing - angle control electrode 121, so that a strong vertical electric field ( Figure 5 E3 in ) is formed between the viewing - angle auxiliary electrode 111 and the viewing - angle control electrode 121, controlling the liquid - crystal molecules 131 and dye molecules 132 in the dye - doped liquid - crystal layer 13 to deflect in the vertical direction and be in an inclined posture. The dye - doped liquid - crystal layer 13 has a light - collecting effect at large viewing angles, that is, the brightness at large viewing angles becomes darker, so as to achieve the narrow - viewing - angle effect.

[0093] When in narrow - viewing - angle display, a common voltage is applied to the common electrode 221, and a corresponding gray - scale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 5 E1 in ), and the positive liquid - crystal molecules in the liquid - crystal layer 23 deflect in the horizontal direction, thereby controlling the intensity of light passing through the liquid - crystal layer 23 to achieve gray - scale display. The gray - scale voltage includes 0 - 255 levels of gray - scale voltage. When different gray - scale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, so as to display different pictures at narrow viewing angles, so as to achieve the normal display of the display device at narrow viewing angles.

[0094] When in narrow viewing angle display, due to the use of the dye liquid crystal layer 13, the dye molecules 132 in the dye liquid crystal layer 13 have the characteristic that the long axis has a strong ability to absorb light and the short axis has a very weak ability to absorb light. When in narrow viewing angle display, the dye molecules 132 can absorb part of the light, thereby increasing the light absorption effect at narrow viewing angles to improve the narrow viewing angle effect. Moreover, a transmissive-reflective layer 34 is provided between the second polarizing plate 32 and the first liquid crystal cell 10. Since the backlight transmitted at a large viewing angle is relatively dim at narrow viewing angles, the golden ambient light reflected by the transmissive-reflective layer 34 can be seen, thereby further improving the anti-peeping effect at narrow viewing angles and achieving a golden anti-peeping effect. Since the backlight transmitted at the front viewing angle (0°) is relatively strong at narrow viewing angles, it can cover the golden ambient light reflected by the transmissive-reflective layer 34. Therefore, the reflected golden ambient light is basically invisible at the front viewing angle, that is, the golden ambient light reflected by the transmissive-reflective layer 34 has basically no impact on the display at the narrow viewing angle front viewing angle.

[0095] The wide viewing angle signal V1 applied to the viewing angle control electrode 121 during wide viewing angle display is greater than the narrow viewing angle signal V2 applied to the viewing angle control electrode 121 during narrow viewing angle display, so that the pressure difference between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 during wide viewing angle display is greater than the pressure difference between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 during narrow viewing angle display.

[0096] The following Table 1 shows the comparison data of the display device of the present application and the display device in the prior art in terms of narrow viewing angle effect and wide viewing angle effect:

[0097]

[0098] It can be seen from the above Table 1 that during wide viewing angle (WVA), for the present application compared with the prior art, the ratios of the brightness at 45° left and right to the brightness at the center (0°) are respectively increased from 1.05% and 1.12% to 4.32% and 4.54%. During narrow viewing angle (NVA), the narrow viewing angle effect of the present application is comparable to that of the prior art. Of course, the display effect at narrow viewing angles can also be improved by increasing the doping ratio of the dye molecules 132.

[0099] Figure 6 It is a simulation diagram of the viewing angle and contrast of the first liquid crystal cell in Example 1 of the present invention under different doping ratios of dye molecules in the wide viewing angle mode. Figure 7 It is a simulation diagram of the viewing angle and contrast of the first liquid crystal cell in Example 1 of the present invention under different doping ratios of dye molecules in the narrow viewing angle mode. Figure 8 It is a measured diagram of the viewing angle and transmittance of the first liquid crystal cell in Example 1 of the present invention under different doping ratios of dye molecules in the narrow viewing angle mode. As Figure 6 and Figure 7As shown, in the figure, a represents the measured graph when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 0, b represents the measured graph when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 1%, c represents the measured graph when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 2%, and d represents the measured graph when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 3%. As Figure 8 shown, in the figure, the curve C0 represents the simulation curve when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 0, and the curve C3 represents the simulation curve when the doping ratio of the dye molecules 132 in the dye liquid crystal layer 13 is 3%. From Figure 6 it can be seen that the doping ratio of the dye molecules 132 has little effect on the wide viewing angle effect of the first liquid crystal cell 10; from Figure 7 and Figure 8 it can be seen that the doping ratio of the dye molecules 132 has a greater effect on the narrow viewing angle effect of the first liquid crystal cell 10.

[0100] The following Table II shows the experimental data of the doping ratio of the dye molecules 132 in the first liquid crystal cell 10 from 0 to 3%. Please refer to Table II below:

[0101]

[0102] It can be seen from the above Table II that the doping ratio of the dye molecules 132 has a greater effect on the narrow viewing angle effect of the first liquid crystal cell 10. Therefore, the light collection effect of the first liquid crystal cell 10 at a narrow viewing angle can be controlled by controlling the doping ratio of the dye molecules 132 in the first liquid crystal cell 10. Among them, Figures 6 - 8 and Table II is only the test data of the first liquid crystal cell 10 alone.

[0103] [Embodiment 2]

[0104] Figure 9 is a schematic structural diagram of the display device in the initial state in Embodiment 2 of the present invention. As Figure 9 shown, the display panel, display device, and driving method provided in Embodiment 2 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 5 ), except that in this embodiment:

[0105] The first substrate 11 is provided with a boss 14 on the side facing the dye liquid crystal layer 13. The boss 14 corresponds to the display area of the display panel, that is, the projection of the boss 14 on the first substrate 11 coincides with the display area. Among them, the boss 14 can be made of a planarization layer (OC). First, a whole-surface planarization layer is covered, and then the planarization layer corresponding to the non-display area is removed to retain the planarization layer corresponding to the display area and form the boss 14. Since the first substrate 11 is prone to bending after being thinned, the first substrate 11 and the second substrate 12 are likely to be adsorbed together to form an abnormal rainbow pattern. By providing the boss 14 in the display area, the strength of the first substrate 11 after being thinned can be enhanced, the distance between the first substrate 11 and the second substrate 12 at the edge of the large plate can be increased, and the first substrate 11 and the second substrate 12 can be prevented from being easily adsorbed together. Moreover, only the boss 14 is provided in the display area, which will not affect the thickness of the first liquid crystal cell 10 and can also avoid the problem of peripheral color difference caused by simply increasing the size of the silicon spheres (SP Size). Of course, in other embodiments, the boss 14 can also be provided on the side of the second substrate 12 facing the dye liquid crystal layer 13, or the first substrate 11 and the second substrate 12 are both provided with the boss 14 on the side facing the dye liquid crystal layer 13.

[0106] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1 and will not be elaborated here.

[0107] [Embodiment 3]

[0108] Figure 10 It is a schematic structural diagram of the display device in the initial state in Embodiment 3 of the present invention. As Figure 10 shown, the display panel, display device, and driving method provided in Embodiment 3 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 5 ), Embodiment 2 ( Figure 9 ). The difference is that in this embodiment:

[0109] The prism structure layer 40 is disposed on the side of the second substrate 12 facing the dye liquid crystal layer 13, and the prism structure layer 40 has a light-diffusing effect on the backlight rays. The backlight rays emitted by the backlight module 50 pass through the prism structure layer 40 and are in a divergent state, thereby enhancing the wide viewing angle effect. Among them, the prism structure layer 40 includes a first refraction layer and a second refraction layer. The first refraction layer is provided with a convex structure, and the second refraction layer covers the first refraction layer. The longitudinal cross-section of the convex structure can be triangular, trapezoidal, semi-circular, etc., and the convex structure is a columnar structure. The refractive index of the first refraction layer is less than that of the second refraction layer, so that after the backlight rays pass through the first refraction layer and the second refraction layer in sequence, they have a divergent effect. Of course, the prism structure layer 40 can be provided on the side of the array substrate 22 facing the liquid crystal layer 23 and the side of the second substrate 12 facing the dye liquid crystal layer 13 at the same time, so as to further enhance the wide viewing angle effect.

[0110] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be described in detail here.

[0111] [Embodiment 4]

[0112] Figure 11 is a schematic structural diagram of the display device in the initial state in Embodiment 4 of the present invention. As Figure 11 shown, the display panel, display device, and driving method provided in Embodiment 4 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 5 ), Embodiment 2 ( Figure 9 ), and Embodiment 3 ( Figure 10 ). The differences are that in this embodiment:

[0113] The second polarizer 32 is a reflective polarizer, that is, the second polarizer 32 has a light-transmitting axis and a light-reflecting axis, and the light-transmitting axis and the light-reflecting axis of the second polarizer 32 are perpendicular to each other. For example, the second polarizer 32 is a reflective polarizer (APF, Advanced Polarizer Film, reflective polarizing ultra-thin optical film), and its specular reflectance (SCI) can reach more than 46%. By also using a reflective polarizer for the second polarizer 32 and then matching it with the transmissive-reflective layer 34, the reflection effect of ambient light can be increased to enhance the anti-peeping effect of the narrow viewing angle and achieve the golden anti-peeping effect. Of course, in other embodiments, when the second polarizer 32 also uses a reflective polarizer, since the reflective polarizer has a light-reflecting effect, the transmissive-reflective layer 34 may not be provided. At this time, a separate viewing angle compensation film can be provided between the second polarizer 32 and the first liquid crystal cell 10, but the reflection effect of ambient light is a little worse.

[0114] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be elaborated here.

[0115] [Embodiment 5]

[0116] Figure 12 FIG. is a schematic structural diagram of the display device in the initial state in Embodiment 5 of the present invention. Figure 13 FIG. is a plan view structural diagram of the display device in Embodiment 5 of the present invention. Figure 14 FIG. is a plan view structural diagram of the viewing angle control electrode in Embodiment 5 of the present invention. As Figures 12 to 14 shown, the display panel, display device, and driving method provided in Embodiment 5 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 5 ), Embodiment 2 ( Figure 9 ), Embodiment 3 ( Figure 10 ), and Embodiment 4 ( Figure 11 ). The differences are that in this embodiment:

[0117] The first liquid crystal cell 10 has an identification pattern area 110 and a non-identification pattern area 120. The viewing angle control electrode 121 includes a first viewing angle control electrode 121a corresponding to the identification pattern area 110 and a second viewing angle control electrode 121b corresponding to the non-identification pattern area 120. The first viewing angle control electrode 121a and the second viewing angle control electrode 121b are insulated from each other and spaced apart, so that in the identification display mode, it is convenient to apply narrow viewing angle signals with different amplitudes to the first viewing angle control electrode 121a and the second viewing angle control electrode 121b respectively. Among them, the pattern of the identification pattern area 110 can be set according to actual needs. The pattern of the first viewing angle control electrode 121a is the same as the pattern of the identification pattern area 110. However, after the first liquid crystal cell 10 is manufactured, the pattern of the identification pattern area 110 cannot be changed, and only the same identification pattern can be displayed in the identification display mode.

[0118] In this embodiment, the first viewing angle control electrode 121a and the second viewing angle control electrode 121b are located on the same layer. Among them, the non-identification pattern area 120 surrounds the periphery of the identification pattern area 110, and the second viewing angle control electrode 121b surrounds the periphery of the first viewing angle control electrode 121a. Therefore, an additional signal wire layer can be provided to electrically connect the first viewing angle control electrode 121a to the bonding area in the non-display area, so as to facilitate applying a control signal to the first viewing angle control electrode 121a. Of course, in other embodiments, the first viewing angle control electrode 121a and the second viewing angle control electrode 121b are located on different layers, so there is no need to additionally provide a signal wire layer. However, since the first viewing angle control electrode 121a and the second viewing angle control electrode 121b are located on different layers and have different distances from the viewing angle auxiliary electrode 111, it has a certain impact on the display effect of the narrow viewing angle of the display device.

[0119] Figure 15 It is the driving signal waveform diagram of the display device in Embodiment 5 of the present invention. Figure 16 It is the schematic structural diagram of the display device in the wide viewing angle mode in Embodiment 5 of the present invention. Figure 17 It is the schematic structural diagram of the display device in the narrow viewing angle mode in Embodiment 5 of the present invention. Figure 18 It is the schematic structural diagram of the display device in the identification display mode in Embodiment 5 of the present invention. As Figures 15 to 18 shown, the present application also provides a driving method, which is used to drive the display panel as described above. The driving method includes:

[0120] As Figure 15 and Figure 16 shown, in the wide viewing angle mode, the backlight module 50 is in the on state, a common signal Vcom is applied to the viewing angle auxiliary electrode 111, and a wide viewing angle signal V1 is applied to the viewing angle control electrode 121, that is, the wide viewing angle signal V1 is applied to both the first viewing angle control electrode 121a and the second viewing angle control electrode 121b. There is a large voltage difference (for example, 5 to 10 V) between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a and between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b, so that a strong vertical electric field ( Figure 16 the E2 in) is formed between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a and between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b, controlling all the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to deflect in the vertical direction and assume a standing posture to achieve the display effect of a wide viewing angle.

[0121] During wide viewing angle display, a common voltage is applied to the common electrode 221, and a corresponding gray scale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field (Figure 16 In E1), the positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 levels of grayscale voltage. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different pictures at a wide viewing angle to achieve normal display of the display device at a wide viewing angle.

[0122] During wide-view display, by providing a prism structure layer 40 with a light-scattering effect and by disposing a first polarizer 31 on the side of the second liquid crystal cell 20 away from the first liquid crystal cell 10, with the mutual cooperation of the prism structure layer 40 and the first polarizer 31, while improving the wide-view effect, it is ensured that there is good wide-view display brightness. During wide-view, since the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a standing posture, the dye molecules 132 basically do not absorb light. Therefore, the dye molecules 132 do not affect the wide-view display effect. Moreover, during wide-view, whether at a large viewing angle or a normal viewing angle (0°), the backlight transmitted is strong, which can cover the golden ambient light reflected by the transflective layer 34. Therefore, the golden ambient light reflected by the transflective layer 34 has basically no influence on the display at a wide viewing angle.

[0123] As Figure 15 and Figure 17 shown, in the narrow-view mode, the backlight module 50 is in an on state. A common signal Vcom is applied to the viewing angle auxiliary electrode 111, and a narrow-view signal V2 is applied to the viewing angle control electrode 121, that is, a first narrow-view signal V21 or a second narrow-view signal V22 is applied to both the first viewing angle control electrode 121a and the second viewing angle control electrode 121b. There is a large voltage difference (for example, 1.5 to 3V, preferably 2.7V) between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a and between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b, so that a strong vertical electric field is formed between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a and between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b ( Figure 17 in E3), controlling all the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be deflected in the vertical direction and to be in the same inclined posture. The dye liquid crystal layer 13 has a light-gathering effect at a large viewing angle, that is, the brightness at a large viewing angle becomes darker, so as to achieve the narrow-view effect.

[0124] During narrow-view display, a common voltage is applied to the common electrode 221, and a corresponding grayscale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 17In E1), the positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltages include 0 to 255 levels of grayscale voltages. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different images at a narrow viewing angle to achieve normal display of the display device at a narrow viewing angle.

[0125] When displaying at a narrow viewing angle, due to the use of the dye liquid crystal layer 13, the dye molecules 132 in the dye liquid crystal layer 13 have the characteristic that the long axis has a strong ability to absorb light and the short axis has a very weak ability to absorb light. When displaying at a narrow viewing angle, the dye molecules 132 can absorb part of the light, thereby increasing the light absorption effect at a narrow viewing angle to improve the narrow viewing angle effect. Moreover, a transflective layer 34 is provided between the second polarizer 32 and the first liquid crystal cell 10. Since the backlight transmitted at a large viewing angle is relatively dim at a narrow viewing angle, the golden ambient light reflected by the transflective layer 34 can be seen, thereby further improving the anti-peeping effect at a narrow viewing angle to achieve a golden anti-peeping effect. Since the backlight transmitted at a narrow viewing angle at the front viewing angle (0°) is relatively strong, it can cover the golden ambient light reflected by the transflective layer 34. Therefore, the reflected golden ambient light is basically invisible at the front viewing angle, that is, the golden ambient light reflected by the transflective layer 34 has basically no influence on the display at the narrow viewing angle front viewing angle.

[0126] As Figure 15 and Figure 18 shown, in the identification display mode, the backlight module 50 is in the on state, a common signal Vcom is applied to the viewing angle auxiliary electrode 111, a first narrow viewing angle signal V21 is applied to the first viewing angle control electrode 121a, and a second narrow viewing angle signal V22 is applied to the second viewing angle control electrode 121b. There is a large voltage difference (for example, 1.5 to 3V) between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a and between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b. However, the amplitudes of the first narrow viewing angle signal V21 and the second narrow viewing angle signal V22 are different, that is, the voltage difference between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a is different from the voltage difference between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b, so that a strong first vertical electric field is formed between the viewing angle auxiliary electrode 111 and the first viewing angle control electrode 121a ( Figure 18 in E3), and a strong second vertical electric field is formed between the viewing angle auxiliary electrode 111 and the second viewing angle control electrode 121b ( Figure 18In E4). Among them, the first narrow viewing angle signal V21 and the second narrow viewing angle signal V22 can have the same polarity or opposite polarities. The liquid crystal molecules 131 and the dye molecules 132 corresponding to the control identification pattern area 110 are controlled to be in a first tilted posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the non-identification pattern area 120 are controlled to be in a second tilted posture. The tilt angles of the first tilted posture and the second tilted posture are different. The dye liquid crystal layer 13 corresponding to the identification pattern area 110 and the dye liquid crystal layer 13 corresponding to the non-identification pattern area 120 have different light-receiving effects at a large viewing angle, and there is a difference in brightness between the identification pattern area 110 and the non-identification pattern area 120 at a large viewing angle. Therefore, the identification pattern (LOGO) corresponding to the identification pattern area 110 can be displayed at a large viewing angle, achieving an enhanced brand effect of the product. It can be understood that in the identification display mode, the first liquid crystal cell 10 also presents a narrow viewing angle display effect.

[0127] In the identification display mode, a common voltage is applied to the common electrode 221, and a corresponding grayscale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 18 in E1). The positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 levels of grayscale voltage. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different pictures in the identification display mode to achieve normal display of the display device in the identification display mode.

[0128] 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, Embodiment 2, Embodiment 3, and Embodiment 4, and will not be elaborated here.

[0129] [Embodiment 6]

[0130] Figure 19 is a schematic structural diagram of the display device in the initial state in Embodiment 6 of the present invention. Figure 20 is a schematic plan view of the second substrate in Embodiment 6 of the present invention. As Figure 19 and Figure 20 shown, the display panel, the display device, and the driving method provided in Embodiment 6 of the present invention are basically the same as those of the display panel, the display device, and the driving method in Embodiment 5 ( Figures 12 to 18 ), the difference being that in this embodiment:

[0131] Since reflective display also needs to be implemented in this embodiment, the transflective layer 34 needs to use a transflective film without an axis. The transflective layer 34 is a one-way transparent film, which has no polarization effect on light. The backlight passing through the one-way transparent film remains natural light, and the ambient light reflected by the one-way transparent film is also natural light. That is, regardless of the polarization direction of the light, the one-way transparent film has both transmission and reflection effects on it.

[0132] A plurality of second scan lines 4 and a plurality of second data lines 5 are provided on the second substrate 12. The second scan lines 4 correspond to the first scan lines 1, and the second data lines 5 correspond to the first data lines 2. The viewing angle control electrode 121 includes a plurality of electrode blocks 121c corresponding to the pixel units SP. The second substrate 12 is provided with a second thin film transistor 6 in each pixel unit SP. The electrode blocks 121c are electrically connected to the second scan lines 4 and the second data lines 5 adjacent to the second thin film transistor 6 through the second thin film transistor 6. That is, by dividing the viewing angle control electrode 121 into a plurality of mutually insulated electrode blocks 121c, the electrode blocks 121c correspond to the pixel units SP one by one, and then the electrode blocks 121c are electrically connected to the second scan lines 4 and the second data lines 5 adjacent to the second thin film transistor 6 through the second thin film transistor 6 to realize individual control of the electrical signals on each electrode block 121c.

[0133] The dye liquid crystal layer 13 is aligned parallel to the first substrate 11 and the second substrate 12, and the alignment direction of the dye liquid crystal layer 13 is parallel to the transmission axis of the third polarizer 33. For example, if the transmission axes of the third polarizer 33 and the second polarizer 32 are both 0°, the alignment direction of the dye liquid crystal layer 13 is also 0°. That is, in the initial state, the long axis of the dye molecules 132 is parallel to the transmission axis of the third polarizer 33. Therefore, the transmittance of the light passing through the dye liquid crystal layer 13 can be controlled by controlling the tilt angle of the dye molecules 132 in the dye liquid crystal layer 13. That is, by applying corresponding gray-scale voltages on different electrode blocks 121c, the pixel units SP can present different brightnesses to realize reflective display using ambient light.

[0134] The first substrate 11 and the second substrate 12 are both colorless and transparent structures in the area corresponding to the pixel units SP. That is, transparent substrates are used on both the first substrate 11 and the second substrate 12, and no color filter layer is provided. Therefore, in reflective display, a black-and-white picture can be displayed, and in transmissive display using backlight, a color picture can be displayed, realizing the function that the display panel can switch between black-and-white and color pictures.

[0135] Further, the first liquid crystal cell 10 has an identification pattern area 110 and a non-identification pattern area 120. In the identification display mode, the electrode blocks 121c corresponding to the identification pattern area 110 and the electrode blocks 121c corresponding to the non-identification pattern area 120 are respectively applied with narrow viewing angle signals having different amplitudes. Among them, the pattern of the identification pattern area 110 can be adjusted arbitrarily according to the user's needs, and only the corresponding electrode blocks 121c in the corresponding area need to be controlled to apply the corresponding narrow viewing angle signals. Therefore, compared with Embodiment 5, the identification pattern (LOGO) displayed in this application can be adjusted arbitrarily according to the user's needs, and reflection display can also be achieved, that is, only the ambient light is used for the display screen.

[0136] Figure 21 FIG. is a schematic structural diagram of the display device in the wide viewing angle mode in Embodiment 6 of the present invention. Figure 22 FIG. is a schematic structural diagram of the display device in the narrow viewing angle mode in Embodiment 6 of the present invention. Figure 23 FIG. is a schematic structural diagram of the display device in the identification display mode in Embodiment 6 of the present invention. Figure 24 FIG. is a schematic plan view of the display device in the identification display mode in Embodiment 6 of the present invention. Figure 25 FIG. is a schematic structural diagram of the display device in the reflection display mode in Embodiment 6 of the present invention. As Figures 21 to 25 shown, and referring to Figure 15 , the present application also provides a driving method, which is used to drive the display panel as described above. The driving method includes:

[0137] As Figure 21 shown, and referring to Figure 15 , in the wide viewing angle mode, the backlight module 50 is in an on state, a common signal Vcom is applied to the viewing angle auxiliary electrode 111, and a wide viewing angle signal V1 is applied to the viewing angle control electrode 121, that is, the wide viewing angle signal V1 is applied to all the electrode blocks 121c through the second data line 5. There is a large voltage difference (for example, 5-10V) between the viewing angle auxiliary electrode 111 and all the electrode blocks 121c, so that a strong vertical electric field ( Figure 21 E2 in) is formed between the viewing angle auxiliary electrode 111 and all the electrode blocks 121c, and all the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 are controlled to deflect in the vertical direction and assume a standing posture to achieve the wide viewing angle effect.

[0138] When displaying in the wide viewing angle, a common voltage is applied to the common electrode 221, and a corresponding gray scale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 21In E1), the positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 levels of grayscale voltage. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different pictures at a wide viewing angle to achieve normal display of the display device at a wide viewing angle.

[0139] When displaying at a wide viewing angle, by setting a prism structure layer 40 with a light scattering effect and collocating a first polarizer 31 on the side of the second liquid crystal cell 20 away from the first liquid crystal cell 10, under the mutual cooperation of the prism structure layer 40 and the first polarizer 31, while improving the wide viewing angle effect, it is ensured that there is better brightness for wide viewing angle display. When at a wide viewing angle, since the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a standing posture, the dye molecules 132 basically do not absorb light. Therefore, the dye molecules 132 do not affect the wide viewing angle display effect. Moreover, when at a wide viewing angle, whether it is a large viewing angle or a front viewing angle (0°), the backlight transmitted is stronger, which can cover the golden ambient light reflected by the transflective layer 34 (one-way perspective film). Therefore, the golden ambient light reflected by the transflective layer 34 has basically no influence on the display at a wide viewing angle.

[0140] As Figure 22 shown and referring to Figure 15 , in the narrow viewing angle mode, the backlight module 50 is in an on state. A common signal Vcom is applied to the viewing angle auxiliary electrode 111, and a narrow viewing angle signal V2 is applied to the viewing angle control electrode 121, that is, a first narrow viewing angle signal V21 or a second narrow viewing angle signal V22 is applied to all the electrode blocks 121c through the second data line 5. There is a large voltage difference (for example, 1.5 to 3V, preferably 2.7V) between the viewing angle auxiliary electrode 111 and all the electrode blocks 121c, so that a strong vertical electric field is formed between the viewing angle auxiliary electrode 111 and all the electrode blocks 121c ( Figure 22 in E3), controlling all the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to deflect in the vertical direction and assume the same inclined posture. The dye liquid crystal layer 13 has a light-receiving effect at a large viewing angle, that is, the brightness at a large viewing angle becomes darker, so as to achieve the narrow viewing angle effect.

[0141] When displaying at a narrow viewing angle, a common voltage is applied to the common electrode 221, and a corresponding grayscale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 22In E1), the positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 levels of grayscale voltage. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, so as to display different pictures at a narrow viewing angle, thereby realizing the normal display of the display device at a narrow viewing angle.

[0142] When displaying at a narrow viewing angle, due to the use of the dye liquid crystal layer 13, the dye molecules 132 in the dye liquid crystal layer 13 have the characteristic that the long axis has a strong ability to absorb light and the short axis has a very weak ability to absorb light. When displaying at a narrow viewing angle, the dye molecules 132 can absorb part of the light, thereby increasing the light absorption effect at a narrow viewing angle to improve the narrow viewing angle effect. In this embodiment, since the alignment direction of the dye liquid crystal layer 13 is parallel to the transmission axis of the third polarizer 33, the dye molecules 132 can absorb more light, further increasing the light absorption effect at a narrow viewing angle. Moreover, a transflective layer 34 (a one-way see-through film) is provided between the second polarizer 32 and the first liquid crystal cell 10. Since the backlight transmitted at a large viewing angle is darker at a narrow viewing angle, the golden ambient light reflected by the transflective layer 34 can be seen, thereby further improving the anti-peeping effect at a narrow viewing angle and realizing the golden anti-peeping effect. Since the backlight transmitted at the frontal viewing angle (0°) is stronger at a narrow viewing angle and can cover the golden ambient light reflected by the transflective layer 34, the reflected golden ambient light is basically invisible at the frontal viewing angle, that is, the golden ambient light reflected by the transflective layer 34 has basically no influence on the display at the narrow viewing angle frontal viewing angle.

[0143] As Figure 23 and Figure 24 shown, and referring to Figure 15 , in the logo display mode, the backlight module 50 is in the on state, a common signal Vcom is applied to the viewing angle auxiliary electrode 111, a first narrow viewing angle signal V21 is applied to the electrode block 121c corresponding to the logo pattern area 110 through the second data line 5, and a second narrow viewing angle signal V22 is applied to the electrode block 121c corresponding to the non-logo pattern area 120. There is a large voltage difference (for example, 1.5 to 3V) between the viewing angle auxiliary electrode 111 and the electrode block 121c corresponding to the logo pattern area 110, and between the viewing angle auxiliary electrode 111 and the electrode block 121c corresponding to the non-logo pattern area 120. However, the amplitudes of the first narrow viewing angle signal V21 and the second narrow viewing angle signal V22 are different, that is, the voltage difference between the viewing angle auxiliary electrode 111 and the electrode block 121c corresponding to the logo pattern area 110 is different from the voltage difference between the viewing angle auxiliary electrode 111 and the electrode block 121c corresponding to the non-logo pattern area 120, so that a strong first vertical electric field is formed between the viewing angle auxiliary electrode 111 and the electrode block 121c corresponding to the logo pattern area 110 ( Figure 23a strong second vertical electric field is formed between the perspective auxiliary electrode 111 and the electrode block 121c corresponding to the non-logo pattern area 120 (E3 in the figure), and also between the perspective auxiliary electrode 111 and the electrode block 121c corresponding to the non-logo pattern area 120 (E4 in the figure). Among them, the first narrow viewing angle signal V21 and the second narrow viewing angle signal V22 can have the same polarity or opposite polarities. The liquid crystal molecules 131 and the dye molecules 132 corresponding to the logo pattern area 110 are controlled to be in a first tilted posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the non-logo pattern area 120 are controlled to be in a second tilted posture. The tilt angles of the first tilted posture and the second tilted posture are different. The dye liquid crystal layer 13 corresponding to the logo pattern area 110 and the dye liquid crystal layer 13 corresponding to the non-logo pattern area 120 have different light-receiving effects at a large viewing angle, and there is a difference in brightness between the logo pattern area 110 and the non-logo pattern area 120 at a large viewing angle. Therefore, a logo corresponding to the logo pattern area 110 can be displayed at a large viewing angle, achieving an enhanced brand effect of the product. It can be understood that in the logo display mode, the first liquid crystal cell 10 also presents a narrow viewing angle effect. In this embodiment, the pattern of the logo pattern area 110 can be adjusted arbitrarily according to user needs. Only by controlling the corresponding electrode block 121c in the corresponding area to apply the corresponding narrow viewing angle signal, the pattern of the logo pattern area 110 can be adjusted. Figure 23 (E4 in the figure). Among them, the first narrow viewing angle signal V21 and the second narrow viewing angle signal V22 can have the same polarity or opposite polarities. The liquid crystal molecules 131 and the dye molecules 132 corresponding to the logo pattern area 110 are controlled to be in a first tilted posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the non-logo pattern area 120 are controlled to be in a second tilted posture. The tilt angles of the first tilted posture and the second tilted posture are different. The dye liquid crystal layer 13 corresponding to the logo pattern area 110 and the dye liquid crystal layer 13 corresponding to the non-logo pattern area 120 have different light-receiving effects at a large viewing angle, and there is a difference in brightness between the logo pattern area 110 and the non-logo pattern area 120 at a large viewing angle. Therefore, a logo corresponding to the logo pattern area 110 can be displayed at a large viewing angle, achieving an enhanced brand effect of the product. It can be understood that in the logo display mode, the first liquid crystal cell 10 also presents a narrow viewing angle effect. In this embodiment, the pattern of the logo pattern area 110 can be adjusted arbitrarily according to user needs. Only by controlling the corresponding electrode block 121c in the corresponding area to apply the corresponding narrow viewing angle signal, the pattern of the logo pattern area 110 can be adjusted.

[0144] In the logo display mode, a common voltage is applied to the common electrode 221, and a corresponding grayscale voltage is applied to the pixel electrode 222. A pressure difference is formed between the pixel electrode 222 and the common electrode 221 and a horizontal electric field (E1 in the figure) is generated. The positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of the light passing through the liquid crystal layer 23 and realizing grayscale display. The grayscale voltage includes grayscale voltages from 0 to 255. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different pictures in the logo display mode to realize the normal display of the display device in the logo display mode. Figure 23 (E1 in the figure). The positive liquid crystal molecules in the liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of the light passing through the liquid crystal layer 23 and realizing grayscale display. The grayscale voltage includes grayscale voltages from 0 to 255. When different grayscale voltages are applied to the pixel electrode 222, the pixel unit SP presents different brightnesses, thereby displaying different pictures in the logo display mode to realize the normal display of the display device in the logo display mode.

[0145] As Figure 25 shown, in the reflective display mode, the backlight module 50 and the second liquid crystal cell 20 are turned off. A common signal Vcom is applied to the perspective auxiliary electrode 111, and corresponding grayscale voltages are respectively applied to the electrode blocks 121c through the second data line 5. Different pressure differences are formed between the perspective auxiliary electrode 111 and the electrode blocks 121c corresponding to different pixel units SP, and vertical electric fields with different intensities are formed, thereby controlling the intensity of the reflected ambient light passing through the first liquid crystal cell 10 and realizing grayscale display. The grayscale voltage includes grayscale voltages from 0 to 255. When different grayscale voltages are applied to the electrode blocks 121c, the pixel unit SP presents different brightnesses to realize reflective display using ambient light.

[0146] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 5, and will not be elaborated here.

[0147] Figure 26 and Figure 27 are schematic plane structure diagrams of the display device in the present invention. Please refer to Figure 26 and Figure 27 , the display device is provided with a viewing angle switching button 60 for the user to send a viewing angle switching request to the display device. The viewing angle switching button 60 can be a physical button (as shown in Figure 26 ), or can be implemented by software control or an application program (APP) to realize the switching function (as shown in Figure 27 , for example, setting the wide and narrow viewing angles through a slider). When the user needs to switch between the wide viewing angle and the narrow viewing angle, a viewing angle switching request can be sent to the display device by operating the viewing angle switching button 60. Finally, the driving chip 70 controls different electrical signals to be applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, and the display device can realize the switching between the wide viewing angle and the narrow viewing angle. When switching to the wide viewing angle, the driving method adopts the driving method corresponding to the wide angle mode. When switching to the narrow viewing angle, the driving method adopts the driving method corresponding to the narrow viewing angle mode. Therefore, the display device of the embodiment of the present invention has strong operation flexibility and convenience, and achieves a multi-functional display device that integrates entertainment video and privacy protection.

[0148] In this article, the orientation words such as up, down, left, right, front, and back are defined based on the position of the structure in the drawings and the position relationship between the structures, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this article are only for distinction in name and do not limit the quantity and order.

[0149] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make some changes or modifications within the scope of the technical solution of the present invention by using the above-disclosed technical content, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

[0150] Industrial applicability

[0151] By providing a prism structure layer with an astigmatic effect and disposing a reflective polarizer on the side of the second liquid crystal cell away from the first liquid crystal cell, the wide viewing angle effect can be enhanced while ensuring good display brightness at a wide viewing angle. Moreover, a dye liquid crystal is used in the first liquid crystal cell, and the dye liquid crystal has a certain light absorption effect at a narrow viewing angle to reduce the influence of the prism structure layer on the narrow viewing angle effect and improve the narrow viewing angle effect. Through the mutual cooperation of the prism structure layer, the reflective polarizer, and the dye liquid crystal, it is possible to enhance the wide viewing angle effect without affecting or improving the narrow viewing angle effect.

Claims

1. A display panel, characterized in that, It includes a first liquid crystal cell (10) and a second liquid crystal cell (20) which are stacked on each other, and the first liquid crystal cell (10) is arranged on the light-emitting side of the second liquid crystal cell (20); The first liquid crystal cell (10) includes a first substrate (11), a second substrate (12) disposed opposite to the first substrate (11), and a dye liquid crystal layer (13) located between the first substrate (11) and the second substrate (12). A viewing angle assisting electrode (111) is provided on the first substrate (11), and a viewing angle control electrode (121) cooperating with the viewing angle assisting electrode (111) is provided on the second substrate (12); The second liquid crystal cell (20) includes a color filter substrate (21), an array substrate (22) disposed opposite to the color filter substrate (21), and a liquid crystal layer (23) disposed between the color filter substrate (21) and the array substrate (22); A first polarizer (31) is provided on the side of the second liquid crystal cell (20) away from the first liquid crystal cell (10), and a second polarizer (32) is provided on the side of the second liquid crystal cell (20) close to the first liquid crystal cell (10). The transmission axis of the second polarizer (32) is perpendicular to the transmission axis of the first polarizer (31). The first polarizer (31) is a reflective polarizer. A prism structure layer (40) is provided in the first liquid crystal cell (10) and / or the second liquid crystal cell (20), and the prism structure layer (40) has a light scattering effect on the backlight; A third polarizer (33) is provided on the side of the first liquid crystal cell (10) away from the second liquid crystal cell (20). The transmission axis of the third polarizer (33) is parallel to the transmission axis of the second polarizer (32). A transmissive and reflective layer (34) is provided between the second polarizer (32) and the first liquid crystal cell (10), and the transmissive and reflective layer (34) is a one-way transparent film.

2. The display panel according to claim 1, wherein The second polarizer (32) is a reflective polarizer.

3. The display panel according to claim 2, wherein The first liquid crystal cell (10) has a logo pattern area (110) and a non-logo pattern area (120). The viewing angle control electrode (121) includes a first viewing angle control electrode (121a) corresponding to the logo pattern area (110) and a second viewing angle control electrode (121b) corresponding to the non-logo pattern area (120). The first viewing angle control electrode (121a) and the second viewing angle control electrode (121b) are insulated from each other and spaced apart; In the logo display mode, the first viewing angle control electrode (121a) and the second viewing angle control electrode (121b) are respectively applied with narrow viewing angle signals having different amplitudes.

4. The display panel according to claim 3, wherein The first viewing angle control electrode (121a) and the second viewing angle control electrode (121b) are located on the same layer, or the first viewing angle control electrode (121a) and the second viewing angle control electrode (121b) are located on different layers.

5. The display panel according to claim 2, characterized in that A plurality of first scan lines (1) and a plurality of first data lines (2) are provided on the array substrate (22). The plurality of first scan lines (1) and the plurality of first data lines (2) are insulated and cross each other to define a plurality of pixel units (SP). The array substrate (22) is provided with a pixel electrode (222) and a first thin film transistor (3) in each pixel unit (SP). The pixel electrode (222) is electrically connected to the first scan line (1) and the first data line (2) adjacent to the first thin film transistor (3) through the first thin film transistor (3). A plurality of second scan lines (4) and a plurality of second data lines (5) are provided on the second substrate (12). The second scan line (4) corresponds to the first scan line (1), and the second data line (5) corresponds to the first data line (2). The viewing angle control electrode (121) includes a plurality of electrode blocks (121c) corresponding to the pixel units (SP). The second substrate (12) is provided with a second thin film transistor (6) in each pixel unit (SP). The electrode block (121c) is electrically connected to the second scan line (4) and the second data line (5) adjacent to the second thin film transistor (6) through the second thin film transistor (6). The first liquid crystal cell (10) has an identification pattern area (110) and a non-identification pattern area (120). In the identification display mode, narrow viewing angle signals with different amplitudes are respectively applied to the electrode blocks (121c) corresponding to the identification pattern area (110) and the electrode blocks (121c) corresponding to the non-identification pattern area (120).

6. The display panel according to claim 1, characterized in that, The dye liquid crystal layer (13) is aligned parallel to the first substrate (11) and the second substrate (12), and the alignment direction of the dye liquid crystal layer (13) is parallel to the transmission axis of the third polarizer (33). A plurality of first scan lines (1) and a plurality of first data lines (2) are provided on the array substrate (22). The plurality of first scan lines (1) and the plurality of first data lines (2) are insulated and cross each other to define a plurality of pixel units (SP). The array substrate (22) is provided with a pixel electrode (222) and a first thin film transistor (3) in each pixel unit (SP). The pixel electrode (222) is electrically connected to the first scan line (1) and the first data line (2) adjacent to the first thin film transistor (3) through the first thin film transistor (3). A plurality of second scan lines (4) and a plurality of second data lines (5) are provided on the second substrate (12). The second scan lines (4) correspond to the first scan lines (1), and the second data lines (5) correspond to the first data lines (2). The viewing angle control electrode (121) includes a plurality of electrode blocks (121c) corresponding to the pixel units (SP). The second substrate (12) is provided with a second thin film transistor (6) in each pixel unit (SP). The electrode blocks (121c) are electrically connected to the second scan lines (4) and the second data lines (5) adjacent to the second thin film transistor (6) through the second thin film transistor (6). In the reflective display mode, corresponding gray scale voltages are respectively applied to the electrode blocks (121c).

7. The display panel according to claim 6, wherein The first substrate (11) and the second substrate (12) are both colorless and transparent structures in the regions corresponding to the pixel units (SP).

8. The display panel according to any one of claims 1-7, characterized in that, The first substrate (11) and / or the second substrate (12) is provided with a boss (14) on the side facing the dye liquid crystal layer (13), and the boss (14) corresponds to the display area of the display panel.

9. The display panel according to any one of claims 1-7, characterized in that, The prism structure layer (40) is provided on the side of the second substrate (12) facing the dye liquid crystal layer (13), and / or the prism structure layer (40) is provided on the side of the array substrate (22) facing the liquid crystal layer (23).

10. A display device, characterized in that, It includes a backlight module (50) and a display panel as described in any one of claims 1-9, and the display panel is provided on the light-emitting side of the backlight module (50).

11. A driving method, characterized in that, The driving method is used to drive the display panel as described in any one of claims 1-9, and the driving method includes:[[]] In the wide viewing angle mode, a common signal (Vcom) is applied to the viewing angle auxiliary electrode (111), and a wide viewing angle signal (V1) is applied to the viewing angle control electrode (121) to control the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) to be in a standing posture. In the narrow viewing angle mode, a common signal (Vcom) is applied to the viewing angle auxiliary electrode (111), and a narrow viewing angle signal (V2) is applied to the viewing angle control electrode (121) to control the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) to be in an inclined posture.

12. The driving method according to claim 11, wherein The second polarizer (32) is a reflective polarizer. The first liquid crystal cell (10) has an identification pattern area (110) and a non-identification pattern area (120). The viewing angle control electrode (121) includes a first viewing angle control electrode (121a) corresponding to the identification pattern area (110) and a second viewing angle control electrode (121b) corresponding to the non-identification pattern area (120). The first viewing angle control electrode (121a) and the second viewing angle control electrode (121b) are insulated from each other and spaced apart. In the identification display mode, a common signal (Vcom) is applied to the viewing angle assisting electrode (111), a first narrow viewing angle signal (V21) is applied to the first viewing angle control electrode (121a), and a second narrow viewing angle signal (V22) is applied to the second viewing angle control electrode (121b). The amplitudes of the first narrow viewing angle signal (V21) and the second narrow viewing angle signal (V22) are different to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the identification pattern area (110) to assume a first inclined posture, and to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the non-identification pattern area (120) to assume a second inclined posture.

13. The driving method according to claim 11, characterized in that, The second polarizing plate (32) is a reflective polarizing plate; The first liquid crystal cell (10) has an identification pattern area (110) and a non-identification pattern area (120). The viewing angle control electrode (121) includes a plurality of electrode blocks (121c) corresponding to pixel units (SP); In the identification display mode, a common signal (Vcom) is applied to the viewing angle assisting electrode (111), a first narrow viewing angle signal (V21) is applied to the electrode block (121c) corresponding to the identification pattern area (110), and a second narrow viewing angle signal (V22) is applied to the electrode block (121c) corresponding to the non-identification pattern area (120). The amplitudes of the first narrow viewing angle signal (V21) and the second narrow viewing angle signal (V22) are different to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the identification pattern area (110) to assume a first inclined posture, and to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the non-identification pattern area (120) to assume a second inclined posture.

14. The driving method according to claim 11, wherein The dye liquid crystal layer (13) is aligned parallel to the first substrate (11) and the second substrate (12), and the alignment direction of the dye liquid crystal layer (13) is parallel to the transmission axis of the third polarizing plate (33). The viewing angle control electrode (121) includes a plurality of electrode blocks (121c) corresponding to pixel units (SP); In the reflective display mode, the backlight module (50) and the second liquid crystal cell (20) are turned off, a common signal (Vcom) is applied to the viewing angle assisting electrode (111), and corresponding gray-scale voltages are applied to the respective electrode blocks (121c).

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