Display panel with switchable wide and narrow viewing angles, driving method, and display device

Abstract

The present invention discloses a display panel with switchable wide and narrow viewing angles, a driving method, and a display device. The display panel has a graphical first graphic area and a second graphic area. The display panel includes a dimming box and a display box stacked on top of each other. The dimming box includes a first substrate, a second substrate, and a first liquid crystal layer. The first substrate is provided with a common viewing angle electrode, and the second substrate is provided with a first viewing angle electrode and a second viewing angle electrode that cooperate with the common viewing angle electrode. The first viewing angle electrode corresponds to the first graphic area, and the second viewing angle electrode corresponds to the second graphic area. In narrow viewing angle mode, within at least part of a cycle, the amplitude of the third electrical signal applied by the first viewing angle electrode is different from the amplitude of the fourth electrical signal applied by the second viewing angle electrode, and the amplitude of the third electrical signal varies periodically. The transmittance of the first graphic area at the same side viewing angle varies periodically, thereby interfering with viewing the display image at a wide viewing angle.

Description

Technical Field

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

[0002] With the continuous advancement of LCD technology, the viewing angle of displays has been widened from approximately 112° to over 160°. While people enjoy the visual experience brought by a wide viewing angle, they also want to effectively protect business secrets and personal privacy to avoid business losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the demand for a wide viewing angle, many situations also require display devices to be able to switch between wide and narrow viewing angles.

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

[0004] Technical issues

[0005] The prior art also utilizes a dimming box and a display panel to achieve switching between wide and narrow viewing angles. The display panel is used for normal image display, and the dimming box is used to control the viewing angle switching. The dimming box includes a first substrate, a second substrate, and a liquid crystal layer between the first and second substrates. The viewing angle control electrodes on the first and second substrates apply a vertical electric field to the liquid crystal molecules, causing the liquid crystal to deflect in the vertical direction, thereby achieving a narrow viewing angle mode. By controlling the voltage on the viewing angle control electrode, switching between wide and narrow viewing angles can be achieved. However, when this wide and narrow viewing angle switchable display panel is in narrow viewing angle mode, the grayscale inversion problem will occur when viewing at large viewing angles (-55° to -75° and 55° to 75°). Although the colors of the displayed image cannot be clearly seen at large viewing angles, the graphics of the displayed image can still be roughly seen, resulting in poor anti-peeping effect at narrow viewing angles.

[0006] Technical Solutions

[0007] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a display panel with switchable wide and narrow viewing angles, a driving method, and a display device, so as to solve the problem in the prior art that the display panel has poor anti-peeping effect at a wide viewing angle when in narrow viewing angle mode.

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

[0009] The present invention provides a driving method capable of switching between wide and narrow viewing angles, and provides a display panel capable of switching between wide and narrow viewing angles, wherein the display panel has a first graphic area and a second graphic area, and the display panel includes a dimming box and a display box stacked on top of each other;

[0010] The dimming box includes a first substrate, a second substrate disposed opposite to the first substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate. A common viewing angle electrode is disposed on a side of the first substrate facing the first liquid crystal layer. A first viewing angle electrode and a second viewing angle electrode cooperating with the common viewing angle electrode are disposed on a side of the second substrate facing the first liquid crystal layer. The first viewing angle electrode and the second viewing angle electrode are insulated from and spaced apart from each other. The first viewing angle electrode corresponds to the first graphic area, and the second viewing angle electrode corresponds to the second graphic area.

[0011] The driving method includes:

[0012] In the wide viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, and a second electrical signal is applied to both the first viewing angle electrode and the second viewing angle electrode, a voltage difference between the second electrical signal and the first electrical signal is less than a first preset value or greater than a second preset value, and the first graphic area and the second graphic area have the same light transmittance at the same side viewing angle;

[0013] In the narrow viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, a third electrical signal is applied to the first viewing angle electrode, and a fourth electrical signal is applied to the second viewing angle electrode. The voltage difference between the third electrical signal and the first electrical signal and the voltage difference between the fourth electrical signal and the first electrical signal are both greater than a third preset value and less than a fourth preset value. Within a cycle, the amplitude of the third electrical signal is different from the amplitude of the fourth electrical signal for at least part of the time, and the amplitude of the third electrical signal varies periodically. The transmittance of the first graphic area at the same side viewing angle varies periodically.

[0014] The first preset value is less than or equal to the third preset value, and the second preset value is greater than the fourth preset value.

[0015] Furthermore, within one cycle, the amplitude of the third electrical signal is different from the amplitude of the fourth electrical signal, and the amplitude of the fourth electrical signal changes periodically.

[0016] Furthermore, the first electrical signal and the second electrical signal are both a DC voltage of 0V; or the first electrical signal is a DC voltage of 0V, and the second electrical signal is an AC voltage with an amplitude greater than 5V.

[0017] Furthermore, the amplitudes of the third electrical signal and the fourth electrical signal are both 1.6V-2.4V, and both are AC voltages.

[0018] Further, when the amplitude of the third electrical signal is different from the amplitude of the fourth electrical signal, the amplitude difference between the third electrical signal and the fourth electrical signal is 0.2V-0.6V.

[0019] Further, at the same moment, the polarity of the third electrical signal is the same as the polarity of the fourth electrical signal.

[0020] Furthermore, the display panel has a third graphic area, and a third viewing electrode cooperating with the common viewing electrode is provided on a side of the second substrate facing the first liquid crystal layer, the third viewing electrode corresponds to the third graphic area, and the first viewing electrode, the second viewing electrode, and the third viewing electrode are insulated from each other;

[0021] The driving method further includes:

[0022] In the wide viewing angle mode, the second electrical signal is applied to the third viewing angle electrode; in the narrow viewing angle mode, the fifth electrical signal is applied to the third viewing angle electrode, the voltage difference between the fifth electrical signal and the first electrical signal is greater than a third preset value and less than a fourth preset value, within one cycle, the amplitude of the fifth electrical signal is different from the amplitude of the third electrical signal, and the amplitude of the fifth electrical signal changes periodically.

[0023] Furthermore, the fifth electrical signal is an AC voltage with an amplitude between 1.6V and 2.4V. When the amplitude of the fifth electrical signal is different from the amplitude of the third electrical signal, the amplitude difference between the fifth electrical signal and the fourth electrical signal is 0.2V-0.6V.

[0024] The present application also provides a display panel with a switchable wide and narrow viewing angle, the display panel being driven by the driving method described above, the display panel having a first graphic area and a second graphic area, and the display panel including a dimming box and a display box stacked on each other;

[0025] The dimming box includes a first substrate, a second substrate arranged opposite to the first substrate, and a first liquid crystal layer arranged between the first substrate and the second substrate. A common viewing angle electrode is provided on the side of the first substrate facing the first liquid crystal layer, and a first viewing angle electrode and a second viewing angle electrode are provided on the side of the second substrate facing the first liquid crystal layer to cooperate with the common viewing angle electrode. The first viewing angle electrode and the second viewing angle electrode are insulated and spaced apart from each other. The first viewing angle electrode corresponds to the first graphic area, and the second viewing angle electrode corresponds to the second graphic area.

[0026] Furthermore, the first graphic area and the first viewing angle electrode are both a plurality of block structures arranged at intervals along the row / column direction, the second graphic area surrounds the outer periphery of the first graphic area, and the second viewing angle electrode surrounds the outer periphery of the first viewing angle electrode.

[0027] Furthermore, the first graphic area and the first viewing angle electrode both have multiple rows / columns.

[0028] Furthermore, the first graphic area, the second graphic area, the first viewing angle electrode and the second viewing angle electrode are all multiple block structures, the first graphic area and the second graphic area are arranged alternately along the row and column directions, and the first viewing angle electrode and the second viewing angle electrode are arranged alternately along the row and column directions.

[0029] Furthermore, the display panel has a third graphic area, and a third viewing electrode that cooperates with the common viewing electrode is provided on the side of the second substrate facing the first liquid crystal layer. The third viewing electrode corresponds to the third graphic area, and the first viewing electrode, the second viewing electrode and the third viewing electrode are insulated from each other.

[0030] Furthermore, the first graphic area, the third graphic area, the first viewing angle electrode and the third viewing angle electrode are all multiple block structures, the first graphic area and the third graphic area are arranged alternately along the row / column direction, the second graphic area surrounds the periphery of the first graphic area and the third graphic area, the first viewing angle electrode and the third viewing angle electrode are arranged alternately along the row / column direction, and the second viewing angle electrode surrounds the periphery of the first viewing angle electrode and the third viewing angle electrode.

[0031] Furthermore, the first graphic areas and the third graphic areas are alternately arranged along row and column directions, and the first viewing angle electrodes and the third viewing angle electrodes are alternately arranged along row and column directions.

[0032] Furthermore, an electrode network is provided on the side of the second substrate facing the first liquid crystal layer, and the electrode network includes a first electrode network and a second electrode network that are insulated and spaced apart from each other, the first viewing angle electrode is electrically connected to the first electrode network, and the second viewing angle electrode is electrically connected to the second electrode network.

[0033] The present application also provides a display device, comprising the display panel with switchable wide and narrow viewing angles as described above.

[0034] Beneficial effects

[0035] The present invention provides the following advantageous effects: a display panel having a first graphic area and a second graphic area, the display panel including a dimming box and a display box stacked together; the dimming box including a first substrate, a second substrate, and a first liquid crystal layer; the first substrate having a common viewing angle electrode, the second substrate having a first viewing angle electrode and a second viewing angle electrode cooperating with the common viewing angle electrode; the first viewing angle electrode corresponding to the first graphic area, and the second viewing angle electrode corresponding to the second graphic area; in narrow viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, a third electrical signal is applied to the first viewing angle electrode, and a fourth electrical signal is applied to the second viewing angle electrode; by having the amplitude of the third electrical signal differ from the amplitude of the fourth electrical signal for at least a portion of a period within a cycle, and by periodically varying the amplitude of the third electrical signal, the transmittance of the first graphic area at the same side viewing angle also varies periodically. This means that when viewed from a wide viewing angle, the brightness of the first graphic area flickers, thereby interfering with viewing of the display image at a wide viewing angle. Even when grayscale inversion is applied, the displayed image cannot be seen, thereby enhancing the privacy protection effect at a wide viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is one of the structural schematic diagrams of the display panel at a wide viewing angle in the first embodiment of the present invention;

[0037] Figure 2 This is a second structural diagram of the display panel at a wide viewing angle in the first embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a display panel at a narrow viewing angle in the first embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the planar structure of the display panel in the first embodiment of the present invention;

[0040] Figure 5 2 is a schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the first embodiment of the present invention;

[0041] Figure 6 Schematic diagram of the planar structure of the electrode network in the first embodiment of the present invention;

[0042] Figure 7 1 is a signal waveform diagram of the display panel at a wide viewing angle in the first embodiment of the present invention;

[0043] Figure 8 is a signal waveform diagram of the display panel at a narrow viewing angle in the first embodiment of the present invention;

[0044] Figure 9 This is a simulation diagram of the transmittance of the display panel at a wide viewing angle in the first embodiment of the present invention;

[0045] Figure 10This is a simulation diagram of the transmittance of the display panel at a narrow viewing angle in the first embodiment of the present invention;

[0046] Figure 11 This is one of the structural schematic diagrams of a display panel at a narrow viewing angle in another embodiment of the present invention;

[0047] Figure 12 This is a second structural schematic diagram of a display panel at a narrow viewing angle according to another embodiment of the present invention;

[0048] Figure 13 This is a third structural diagram of a display panel at a narrow viewing angle according to another embodiment of the present invention;

[0049] Figure 14 is a signal waveform diagram of the display panel at a narrow viewing angle in the second embodiment of the present invention;

[0050] Figure 15 is a schematic diagram of the planar structure of the display panel in the third embodiment of the present invention;

[0051] Figure 16 2 is a schematic diagram of the planar structure of the first viewing angle electrode, the second viewing angle electrode, and the third viewing angle electrode in the third embodiment of the present invention;

[0052] Figure 17 is a signal waveform diagram of the display panel at a narrow viewing angle in the third embodiment of the present invention;

[0053] Figure 18 is a schematic diagram of the planar structure of the display panel in the fourth embodiment of the present invention;

[0054] Figure 19 2 is a schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the fourth embodiment of the present invention;

[0055] Figure 20 is a schematic diagram of the planar structure of the display panel in the fifth embodiment of the present invention;

[0056] Figure 21 2 is a schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the fifth embodiment of the present invention;

[0057] Figure 22 This is one of the planar structural diagrams of the display device of the present invention;

[0058] Figure 23 This is the second schematic diagram of the planar structure of the display device in the present invention.

[0059] Modes for Carrying Out the Invention

[0060] To further illustrate the technical means and effects of the present invention to achieve the intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effects of the display panel and driving method with switchable wide and narrow viewing angles, and the display device proposed in the present invention.

[0061] [Example 1]

[0062] Figure 1 This is one of the structural schematic diagrams of the display panel at a wide viewing angle in the first embodiment of the present invention. Figure 2 This is the second structural schematic diagram of the display panel at a wide viewing angle in the first embodiment of the present invention. Figure 3 3 is a schematic structural diagram of a display panel at a narrow viewing angle in the first embodiment of the present invention. Figure 4 It is a schematic diagram of the planar structure of the display panel in the first embodiment of the present invention. Figure 5 Schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the first embodiment of the present invention. Figure 6 FIG. 1 is a schematic diagram of the planar structure of the electrode network in the first embodiment of the present invention. Figures 1 to 6 As shown, a display panel with a wide and narrow viewing angle switchable is provided in the first embodiment of the present invention. The display panel has a first graphic area 110 and a second graphic area 120 ( Figure 4 The display panel includes a dimming box 10 and a display box 20 stacked on top of each other. In this embodiment, the dimming box 10 is located above the display box 20, that is, the dimming box 10 is located on the light-emitting side of the display box 20. The dimming box 10 is used to control the viewing angle of the display panel, and the display box 20 is used to control the display panel to display a normal image. Of course, the dimming box 10 can also be located below the display box 20, that is, the dimming box 10 is located on the light-incident side of the display box 20.

[0063] The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite the first substrate 11, and a first liquid crystal layer 13 disposed between the first and second substrates 11, 12. A common viewing electrode 111 is provided on the side of the first substrate 11 facing the first liquid crystal layer 13, and a first viewing electrode 121 and a second viewing electrode 122 are provided on the side of the second substrate 12 facing the first liquid crystal layer 13, cooperating with the common viewing electrode 111. The first viewing electrode 121 and the second viewing electrode 122 are insulated from and spaced apart from each other. The first viewing electrode 121 corresponds to the first graphic area 110, and the second viewing electrode 122 corresponds to the second graphic area 120. The deflection of the liquid crystal molecules in the first liquid crystal layer 13 is controlled by controlling the voltage difference between the common viewing electrode 111 and the first viewing electrode 121, and between the common viewing electrode 111 and the second viewing electrode 122, thereby achieving wide and narrow viewing angle switching.

[0064] The first liquid crystal layer 13 preferably uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The phase retardation of the first liquid crystal layer 13 is preferably 700nm, and the optional range is 500nm < phase retardation < 1000nm. In the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12. The alignment direction of the positive liquid crystal molecules close to the first substrate 11 is parallel or anti-parallel to the alignment direction of the positive liquid crystal molecules close to the second substrate 12, so that the dimming box 10 presents a wide viewing angle display in the initial state, such as Figure 1 When a narrow viewing angle display is required, a viewing angle control voltage is applied to the common viewing angle electrode 111, the first viewing angle electrode 121, and the second viewing angle electrode 122, so that a large voltage difference and a strong electric field are formed between the common viewing angle electrode 111 and the first viewing angle electrode 121, and between the common viewing angle electrode 111 and the second viewing angle electrode 122, so as to drive the positive liquid crystal molecules in the first liquid crystal layer 13 to deflect in the vertical direction, thereby making the dimming box 10 present a narrow viewing angle display, as shown in FIG. Figure 3 shown.

[0065] In one embodiment, Figure 12 As shown, the first liquid crystal layer 13 may also use negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned perpendicular to the first substrate 11 and the second substrate 12. Alternatively, as Figure 13 As shown, when the first liquid crystal layer 13 adopts positive liquid crystal molecules, the alignment direction of the positive liquid crystal molecules close to the second substrate 12 is parallel to the second substrate 12, while the positive liquid crystal molecules close to the first substrate 11 are perpendicular to the first substrate 11, that is, the positive liquid crystal molecules in the first liquid crystal layer 13 adopt a mixed alignment; of course, it is also possible that the alignment direction of the positive liquid crystal molecules close to the second substrate 12 is perpendicular to the second substrate 12, while the positive liquid crystal molecules close to the first substrate 11 are parallel to the first substrate 11.

[0066] In this embodiment, an insulating layer 124 is provided on the side of the second substrate 12 facing the first liquid crystal layer 13. The insulating layer 124 is provided on the side of the second substrate 12 closest to the first liquid crystal layer 13. The insulating layer 124 covers the second viewing angle electrode 122, thereby preventing a short circuit between the common viewing angle electrode 111 and the second viewing angle electrode 122. Of course, in one embodiment, if Figure 11 As shown, a flat layer 112 may be provided on the side of the first substrate 11 facing the first liquid crystal layer 13. The flat layer 112 covers the common viewing angle electrode 111, thereby preventing a short circuit between the common viewing angle electrode 111 and the second viewing angle electrode 122. Alternatively, an insulating layer 124 may be provided on the side of the second substrate 12 facing the first liquid crystal layer 13, and the flat layer 112 may be provided on the side of the first substrate 11 facing the first liquid crystal layer 13.

[0067] In this embodiment, the second viewing angle electrodes 122 and the first viewing angle electrodes 121 are located in different layers, and are separated from the first viewing angle electrodes 121 by an insulating layer, thereby avoiding the risk of short circuit between the second viewing angle electrodes 122 and the first viewing angle electrodes 121. Of course, in other embodiments, the second viewing angle electrodes 122 and the first viewing angle electrodes 121 may also be located in the same layer, thereby avoiding the reflectivity difference between the second viewing angle electrodes 122 and the first viewing angle electrodes 121, which would result in a brightness difference between the first graphic area 110 and the second graphic area 120 at wide or narrow viewing angles, thereby affecting the normal display of the image.

[0068] like Figure 4 and Figure 5 As shown, the first graphic area 110 and the first viewing angle electrode 121 are both multiple block-shaped structures spaced apart along the row direction. The second graphic area 120 surrounds the periphery of the first graphic area 110, and the second viewing angle electrode 122 surrounds the periphery of the first viewing angle electrode 121. Of course, in other embodiments, the first graphic area 110 and the first viewing angle electrode 121 can also be multiple block-shaped structures spaced apart along the column direction. The shape of each block-shaped first graphic area 110 and first viewing angle electrode 121 can be square, circular, an icon pattern, or other shapes. For example, in the case of an icon pattern, the brightness of the icon pattern can be seen to change when viewed in narrow viewing angle mode or wide viewing angle mode.

[0069] Furthermore, an electrode mesh 123 is provided on the side of the second substrate 12 facing the first liquid crystal layer 13. The electrode mesh 123 includes a first electrode mesh 123a and a second electrode mesh 123b, which are insulated and spaced apart from each other. The first viewing electrode 121 is electrically connected to the first electrode mesh 123a, and the second viewing electrode 122 is electrically connected to the second electrode mesh 123b. In this embodiment, the first electrode mesh 123a and the second electrode mesh 123b are located on the same layer. The first viewing electrode 121 is provided on the upper surface of the first electrode mesh 123a and is in conductive contact with the first electrode mesh 123a, thereby reducing the resistance of the first viewing electrode 121. The second viewing electrode 122 is electrically connected to the second electrode mesh 123b via contact holes, thereby reducing the resistance of the second viewing electrode 122.

[0070] The dimming box 10 is provided with a first signal line 1 electrically connected to the first electrode network 123a and a second signal line 2 of the second electrode network 123b in the non-display area at the edge. The first signal line 1 and the second signal line 2 are both led out around the edge of the dimming box 10, so that an electrical signal is applied to the first viewing angle electrode 121 through the first signal line 1, and an electrical signal is applied to the second viewing angle electrode 122 through the second signal line 2.

[0071] In this embodiment, the display box 20 is preferably a liquid crystal box. Of course, in other embodiments, the display box 20 can also be a self-luminous display (such as an OLED display or a Micro LED display), but the dimming box 10 needs to be arranged above the display box 20.

[0072] The display box 20 includes a color filter substrate 21, an array substrate 22 disposed opposite the color filter substrate 21, and a second liquid crystal layer 23 disposed between the color filter substrate 21 and the array substrate 22. The second liquid crystal layer 23 preferably uses positive liquid crystal molecules, i.e., liquid crystal molecules with positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the second liquid crystal layer 23 are aligned parallel to the color filter substrate 21 and the array substrate 22, and the positive liquid crystal molecules on the side close to the color filter substrate 21 are aligned parallel or antiparallel to the positive liquid crystal molecules on the side close to the array substrate 22. Of course, in other embodiments, the second liquid crystal layer 23 may also use negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 23 may be aligned perpendicular to the color filter substrate 21 and the array substrate 22, i.e., an alignment method similar to that of the VA display mode.

[0073] Furthermore, a first polarizer 31 is provided on the side of the dimming box 10 away from the display box 20, a second polarizer 32 is provided between the dimming box 10 and the display box 20, and a third polarizer 33 is provided on the side of the display box 20 away from the dimming box 10. The light transmission axis of the first polarizer 31 is parallel to the light transmission axis of the second polarizer 32, and the light transmission axis of the third polarizer 33 is perpendicular to the light transmission axis of the second polarizer 32.

[0074] The alignment direction of the first liquid crystal layer 13 can be perpendicular to the transmission axes of the first polarizer 31 and the second polarizer 32. For example, the transmission axes of the first polarizer 31 and the second polarizer 32 are 0°, and the alignment direction of the first liquid crystal layer 13 is 90°. Of course, the alignment direction of the first liquid crystal layer 13 can also be parallel to the transmission axes of the first polarizer 31 and the second polarizer 32. For example, the transmission axes of the first polarizer 31 and the second polarizer 32 are 90°, and the alignment direction of the first liquid crystal layer 13 is 90°.

[0075] The color filter substrate 21 is provided with color resist layers 212 arranged in an array and a black matrix 211 separating the color resist layers 212. The color resist layers 212 include red (R), green (G), and blue (B) color resist materials, which form corresponding red (R), green (G), and blue (B) sub-pixels. Each block-shaped first graphic area 110 can correspond to multiple sub-pixels or a single sub-pixel.

[0076] On the side of the array substrate 22 facing the second liquid crystal layer 23, a plurality of scan lines (not shown) and a plurality of data lines (not shown) are insulated and intersecting to form a plurality of pixel units. Each pixel unit is provided with a pixel electrode 222 and a thin-film transistor (not shown). The pixel electrode 222 is electrically connected to the data line of the adjacent thin-film transistor through the thin-film transistor. The thin-film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan lines are located on the same layer and are electrically connected. The gate and the active layer are separated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 222 through a contact hole.

[0077] like Figure 1 As shown, in this embodiment, a common electrode 221 is further provided on the side of the array substrate 22 facing the second liquid crystal layer 23. The common electrode 221 and the pixel electrode 222 are located in different layers and are insulated and isolated by an insulating layer. The common electrode 221 can 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. Preferably, the common electrode 221 is a planar electrode provided on the entire surface, and the pixel electrode 222 is a block electrode provided in an entire block within each pixel unit, or a slit electrode having multiple electrode strips, to form a fringe field switching mode (FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located on the same layer, but the two are insulated and isolated from each other. The pixel electrode 222 and the common electrode 221 may each include multiple electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are arranged alternately to form an in-plane switching mode (IPS); alternatively, in other embodiments, the array substrate 22 is provided with a pixel electrode 222 on the side facing the second liquid crystal layer 23, and the color filter substrate 21 is provided with a common electrode 221 on the side facing the second liquid crystal layer 23, to form a TN mode or a VA mode.

[0078] 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 common viewing angle electrode 111, the first viewing angle electrode 121, the second viewing angle electrode 122, the common electrode 221, and the pixel electrode 222 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0079] The present invention further provides a display device comprising the wide and narrow viewing angle switchable display panel as described above and a backlight module 40, wherein the backlight module 40 is located below the display panel and is used to provide a backlight source for the display panel. Of course, if the display box 20 adopts a self-luminous display, the display device does not need to be equipped with an additional backlight source.

[0080] The backlight module 40 includes a backlight source 41 and an anti-peep layer 43. The anti-peep layer 43 is used to narrow the range of light emission angles. A brightness enhancement film 42 is also provided between the backlight source 41 and the anti-peep layer 43. The brightening film 42 increases the brightness of the backlight module 40. The anti-peep layer 43 is equivalent to a miniature shutter structure, which can block light with a larger incident angle and allow light with a smaller incident angle to pass through, thereby reducing the angle range of light passing through the anti-peep layer 43. The anti-peep layer 43 includes a plurality of parallel light-blocking walls and a light-transmitting hole located between two adjacent light-blocking walls. Light-absorbing materials are provided on both sides of the light-blocking walls. Of course, the backlight source 41 can also be a light-collecting backlight source, so there is no need to set the anti-peep layer 43, but the light-collecting backlight source is more expensive than the conventional backlight source.

[0081] The backlight module 40 can be an edge-lit backlight module or a direct-lit backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL) mode, which can collect light and ensure the display effect.

[0082] Figure 7 1 is a signal waveform diagram of the display panel at a wide viewing angle in the first embodiment of the present invention; Figure 8 1 is a signal waveform diagram of the display panel at a narrow viewing angle in the first embodiment of the present invention.

[0083] The present invention further provides a driving method for switching between wide and narrow viewing angles, the driving method being used to drive the display panel with switchable between wide and narrow viewing angles as described above, the driving method comprising:

[0084] In the wide viewing angle mode, a first electrical signal V1 is applied to the common viewing angle electrode 111, wherein the first electrical signal V1 is a DC common voltage signal, and a second electrical signal V2 is applied to both the first viewing angle electrode 121 and the second viewing angle electrode 122, wherein the voltage difference between the second electrical signal V2 and the first electrical signal V1 is less than a first preset value (e.g., less than 0.7V). Figure 7 As shown, a DC voltage of 0V is applied to the common viewing angle electrode 111, the first viewing angle electrode 121, and the second viewing angle electrode 122. Basically, no vertical electric field is formed between the common viewing angle electrode 111 and the first viewing angle electrode 121, and between the common viewing angle electrode 111 and the second viewing angle electrode 122. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect and maintain their initial flat state ( Figure 1 ), at this time, the dimming box 10 presents a wide viewing angle display. Of course, the voltage difference between the second electrical signal V2 and the first electrical signal V1 can also be greater than the second preset value (for example, greater than 5.0V), wherein the second preset value is much greater than the first preset value, and a strong vertical electric field ( Figure 2In E2), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and perpendicular to the first substrate 11 and the second substrate 12. At this time, the dimming box 10 also presents a wide viewing angle display.

[0085] Since the first viewing angle electrode 121 and the second viewing angle electrode 122 apply the same electrical signal in the wide viewing angle mode, the first graphic area 110 and the second graphic area 120 have the same transmittance under the front view and the same side view, and the first graphic area 110 and the second graphic area 120 both present a wide viewing angle display.

[0086] Furthermore, in the wide viewing angle mode, as Figure 1 As shown in FIG. 1 , as an embodiment, the common viewing angle electrode 111 , the first viewing angle electrode 121 and the second viewing angle electrode 122 are all applied with a DC voltage of 0V, that is, the first electrical signal V1 and the second electrical signal V2 are both DC voltages of 0V. Figure 2 As shown in FIG, as another embodiment, the first electrical signal V1 is a DC voltage of 0V, and the second electrical signal V2 is an AC voltage with an amplitude greater than 5V. Figure 9 As shown in the figure, curve W1 represents the curve of the transmittance of the first graphic area 110 changing with the viewing angle, and curve W2 represents the curve of the transmittance of the second graphic area 120 changing with the viewing angle. Figure 9 It can be seen that at a wide viewing angle, the transmittance of the first graphic area 110 and the second graphic area 120 are substantially the same at the same viewing angle, and the first graphic area 110 and the second graphic area 120 have almost no effect on the display effect at a wide viewing angle.

[0087] like Figure 8 As shown, in the narrow viewing angle mode, a first electric signal V1, i.e., a DC common voltage signal, is applied to the common viewing angle electrode 111, a third electric signal V3 is applied to the first viewing angle electrode 121, and a fourth electric signal V4 is applied to the second viewing angle electrode 122. The voltage difference between the third electric signal V3 and the first electric signal V1 and the voltage difference between the fourth electric signal V4 and the first electric signal V1 are both greater than a third preset value (e.g., greater than 1.2V) and less than a fourth preset value (e.g., less than 4.0V). The first preset value is less than or equal to the third preset value, and the second preset value is greater than the fourth preset value. At this time, a strong vertical electric field ( Figure 3 E3 and E4 in the figure), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and tilted, and the brightness becomes darker under a large viewing angle. At this time, the dimming box 10 presents a narrow viewing angle display.

[0088] Among them, Figure 8As shown, within a period T, the amplitude of the third electrical signal V3 is different from the amplitude of the fourth electrical signal V4 for at least part of the time, and the amplitude of the third electrical signal V3 varies periodically. In this embodiment, within a period T, the amplitude of the third electrical signal V3 is the same as the amplitude of the fourth electrical signal V4 for the first T / 2 time, and the amplitude of the third electrical signal V3 is different from the amplitude of the fourth electrical signal V4 for the next T / 2 time.

[0089] Because in narrow viewing angle mode, the amplitude of the third electrical signal V3 differs from the amplitude of the fourth electrical signal V4 for at least part of a period T, and the amplitude of the third electrical signal V3 varies periodically, during the first T / 2 period, the amplitude of the third electrical signal V3 is the same as the amplitude of the fourth electrical signal V4, and the first graphic area 110 and the second graphic area 120 have the same brightness at the same side viewing angle. However, during the second T / 2 period, the amplitude of the third electrical signal V3 differs from the amplitude of the fourth electrical signal V4, and therefore, the first graphic area 110 and the second graphic area 120 have different deflection angles corresponding to the positive liquid crystal molecules in the first liquid crystal layer 13, and the first graphic area 110 and the second graphic area 120 have different light transmittances at the same side viewing angle, and the first graphic area 110 and the second graphic area 120 also have different brightness at the same side viewing angle. Moreover, the amplitude of the third electrical signal V3 varies periodically. Therefore, in the narrow viewing angle mode, when viewed from a wide viewing angle, the brightness of the first graphic area 110 will flicker periodically, thereby interfering with viewing of the display image at a wide viewing angle. Even in the case of grayscale inversion, the graphics on the display image cannot be seen, thereby enhancing the anti-peeping effect at a wide viewing angle.

[0090] like Figure 10 As shown, when the amplitude of the third electrical signal V3 is different from the amplitude of the fourth electrical signal V4, the curve N1 in the figure represents the curve of the transmittance of the first graphic area 110 changing with the viewing angle, and the curve N2 represents the curve of the transmittance of the second graphic area 120 changing with the viewing angle. Figure 10 It can be seen that at narrow viewing angles and when the amplitude of the third electrical signal V3 differs from the amplitude of the fourth electrical signal V4, the transmittance of the first graphic area 110 and the second graphic area 120 at normal viewing angles (-30° to 30°) is essentially the same, while the transmittance at wide viewing angles (-55° to -75° and 55° to 75°) differs significantly. It can be understood that when the amplitude of the third electrical signal V3 is the same as the amplitude of the fourth electrical signal V4, the transmittance of the first graphic area 110 and the second graphic area 120 at the same viewing angle is the same. Therefore, due to the periodic variation in the amplitude of the third electrical signal V3, the brightness of the first graphic area 110 periodically flickers in narrow viewing angle mode and when viewed from a wide viewing angle, thereby interfering with viewing the display at wide viewing angles. Even when grayscale inversion is applied, the displayed image cannot be seen, thereby enhancing the anti-peeping effect at wide viewing angles.

[0091] Furthermore, in narrow viewing angle mode, as an embodiment, the amplitudes of the third electrical signal V3 and the fourth electrical signal V4 are 1.6V-2.4V, and both the third electrical signal V3 and the fourth electrical signal V4 are AC voltages. When the amplitudes of the third electrical signal V3 and the fourth electrical signal V4 are different, the amplitude difference between the third electrical signal V3 and the fourth electrical signal V4 is 0.2V-0.6V. For example, the amplitude of the fourth electrical signal V4 is 1.6V, while the amplitude of the third electrical signal V3 periodically varies between 2.0V and 1.6V.

[0092] Liquid crystal molecules are susceptible to polarization when subjected to a single-direction electric field for a long period of time. In narrow viewing angle mode, both the third electrical signal V3 and the fourth electrical signal V4 use AC voltages. The electric field is not directed in a single direction but rather changes direction continuously. This prevents polarization of the liquid crystal molecules under strong vertical electric fields.

[0093] In this embodiment, at the same time, the polarity of the third electrical signal V3 is the same as the polarity of the fourth electrical signal V4. Of course, in other embodiments, at the same time, the polarity of the third electrical signal V3 and the polarity of the fourth electrical signal V4 may be opposite. Therefore, the directions of the electric fields formed between the first viewing angle electrode 121 and the second viewing angle electrode 122 and the common viewing angle electrode 111 are also opposite. This will cause the strength of the vertical electric field at the junction of the first viewing angle electrode 121 and the second viewing angle electrode 122 to be weakened, affecting the narrow viewing angle effect.

[0094] The period T of the amplitude change of the third electrical signal V3 can be set according to actual conditions. The period T can be different from or the same as the period of the polarity change of the third electrical signal V3.

[0095] [Example 2]

[0096] Figure 14 : is a signal waveform diagram of the display panel at a narrow viewing angle in the second embodiment of the present invention. Figure 14 As shown, the display panel with wide and narrow viewing angles switchable, the driving method, and the display device provided in the second embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 13 ) are substantially the same as the display panel, driving method, and display device with switchable wide and narrow viewing angles in the embodiment described above, differing in the driving method. In this embodiment, the driving method is as follows: in the narrow viewing angle mode, within a period T, the amplitude of the third electrical signal V3 and the amplitude of the fourth electrical signal V4 are different, and the amplitude of the fourth electrical signal V4 varies periodically. That is, in the narrow viewing angle mode, the brightness of the second graphic area 120 also flickers periodically when viewed from a side angle.

[0097] Preferably, within a period T, the amplitude of the third electrical signal V3 is smaller than that of the fourth electrical signal V4 for the first T / 2 period, and greater than that of the fourth electrical signal V4 for the next T / 2 period. Thus, when viewing at a wide viewing angle in narrow viewing angle mode, when the first graphic area 110 becomes brighter, the second graphic area 120 becomes darker; and when the first graphic area 110 becomes darker, the second graphic area 120 becomes brighter. This increases the brightness difference between the first and second graphic areas 110, 120, further facilitating interference-free viewing of the display at wide viewing angles. Even when grayscale inversion is applied, the displayed image cannot be seen, further enhancing the anti-peeping effect at wide viewing angles.

[0098] It should be understood by those skilled in the art that the remaining structures and working principles of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0099] [Example 3]

[0100] Figure 15 It is a schematic diagram of the planar structure of the display panel in the third embodiment of the present invention. Figure 16 2 is a schematic diagram of the planar structure of the first viewing angle electrode, the second viewing angle electrode and the third viewing angle electrode in the third embodiment of the present invention. Figure 17 This is a signal waveform diagram of the display panel at a narrow viewing angle in the third embodiment of the present invention. Figure 15-17 As shown, the display panel with wide and narrow viewing angles switchable, the driving method, and the display device provided in the third embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 13 ) are basically the same as the display panel with switchable wide and narrow viewing angles, the driving method, and the display device. The difference is that, in this embodiment, the display panel has a third graphic area 130, and the side of the second substrate 12 facing the first liquid crystal layer 13 is provided with a third viewing angle electrode 125 that cooperates with the common viewing angle electrode 111. The third viewing angle electrode 125 corresponds to the third graphic area 130, and the first viewing angle electrode 121, the second viewing angle electrode 122 and the third viewing angle electrode 125 are insulated from each other.

[0101] Furthermore, the first graphic area 110, the third graphic area 130, the first viewing angle electrode 121 and the third viewing angle electrode 125 are all block structures, the first graphic area 110 and the third graphic area 130 are arranged alternately in the row / column direction, the second graphic area 120 surrounds the periphery of the first graphic area 110 and the third graphic area 130, the first viewing angle electrode 121 and the third viewing angle electrode 125 are arranged alternately in the row / column direction, and the second viewing angle electrode 122 surrounds the periphery of the first viewing angle electrode 121 and the third viewing angle electrode 125.

[0102] In this embodiment, the first graphic areas 110 and the third graphic areas 130 of the multiple block-shaped structures are arranged alternately along the row direction, and the first viewing angle electrodes 121 and the third viewing angle electrodes 125 of the multiple block-shaped structures are arranged alternately along the row direction. Of course, the first graphic areas 110 and the third graphic areas 130 of the multiple block-shaped structures may also be arranged alternately along the column direction, and the first viewing angle electrodes 121 and the third viewing angle electrodes 125 of the multiple block-shaped structures may also be arranged alternately along the column direction. Alternatively, the first graphic areas 110 and the third graphic areas 130 are arranged alternately along both the row and column directions, and the first viewing angle electrodes 121 and the third viewing angle electrodes 125 are arranged alternately along both the row and column directions, so that the first graphic areas 110 and the third graphic areas 130 are distributed like a mosaic. At narrow or wide viewing angles, the brightness of the first graphic areas 110 and the third graphic areas 130 periodically flickers, which can significantly interfere with viewing the display at wide viewing angles and enhance the anti-peeping effect at wide viewing angles.

[0103] Furthermore, since the third viewing angle electrode 125 is provided on the side of the second substrate 12 facing the first liquid crystal layer 13, the electrode mesh 123 also includes a third electrode mesh to apply an electrical signal to the third viewing angle electrode 125. The first electrode mesh 123a, the second electrode mesh 123b, and the third electrode mesh are insulated and spaced apart from each other, and the third electrode mesh is electrically connected to the third viewing angle electrode 125. Preferably, the third viewing angle electrode 125 is provided on the same layer as the first viewing angle electrode 121.

[0104] like Figure 17 As shown, this embodiment also provides a driving method with switchable wide and narrow viewing angles, which is similar to the driving method in embodiment 1 ( Figure 7 and Figure 8 ) are basically the same, except that:

[0105] In the wide viewing angle mode, a first electrical signal V1 is applied to the common viewing angle electrode 111, wherein the first electrical signal V1 is a DC common voltage signal, and a second electrical signal V2 is applied to the first viewing angle electrode 121, the second viewing angle electrode 122, and the third viewing angle electrode 125, wherein the voltage difference between the second electrical signal V2 and the first electrical signal V1 is less than a first preset value (e.g., less than 0.7V). Preferably, reference Figure 7 As shown, a DC voltage of 0V is applied to the common viewing angle electrode 111, the first viewing angle electrode 121, the second viewing angle electrode 122, and the third viewing angle electrode 125. Basically, no vertical electric field is formed between the common viewing angle electrode 111 and the first viewing angle electrode 121, between the common viewing angle electrode 111 and the second viewing angle electrode 122, and between the common viewing angle electrode 111 and the third viewing angle electrode 125. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect and maintain their initial flat state (refer to FIG. Figure 1), at this time, the dimming box 10 presents a wide viewing angle display. Of course, the voltage difference between the second electrical signal V2 and the first electrical signal V1 can also be greater than the second preset value (for example, greater than 5.0V), wherein the second preset value is much greater than the first preset value, and a strong vertical electric field will be formed between the common viewing angle electrode 111 and the first viewing angle electrode 121, between the common viewing angle electrode 111 and the second viewing angle electrode 122, and between the common viewing angle electrode 111 and the third viewing angle electrode 125 (refer to Figure 2 In E2), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and perpendicular to the first substrate 11 and the second substrate 12. At this time, the dimming box 10 also presents a wide viewing angle display.

[0106] like Figure 17 As shown, in the narrow viewing angle mode, a first electrical signal V1, i.e., a DC common voltage signal, is applied to the common viewing angle electrode 111, a third electrical signal V3 is applied to the first viewing angle electrode 121, a fourth electrical signal V4 is applied to the second viewing angle electrode 122, and a fifth electrical signal V5 is applied to the third viewing angle electrode 125. The voltage difference between the third electrical signal V3 and the first electrical signal V1, the voltage difference between the fourth electrical signal V4 and the first electrical signal V1, and the voltage difference between the fifth electrical signal V5 and the first electrical signal V1 are all greater than a third preset value (e.g., greater than 1.2V). and is less than a fourth preset value (for example, less than 4.0V), wherein the first preset value is less than or equal to the third preset value, and the second preset value is greater than the fourth preset value. At this time, a strong vertical electric field is formed between the common viewing angle electrode 111 and the first viewing angle electrode 121, between the common viewing angle electrode 111 and the second viewing angle electrode 122, and between the common viewing angle electrode 111 and the third viewing angle electrode 125. The positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and are in a tilted state. The brightness becomes darker at a large viewing angle. At this time, the dimming box 10 presents a narrow viewing angle display.

[0107] Among them, Figure 8As shown, within a period T, at least partially, the amplitude of the third electrical signal V3 differs from the amplitude of the fourth electrical signal V4, and the amplitude of the third electrical signal V3 varies periodically. Furthermore, the amplitude of the fifth electrical signal V5 differs from the amplitude of the third electrical signal V3, and the amplitude of the fifth electrical signal V5 varies periodically. In this embodiment, within a period T, the amplitude of the third electrical signal V3 is the same as the amplitude of the fourth electrical signal V4 for the first T / 2 period, while the amplitude of the fifth electrical signal V5 differs from the amplitude of the fourth electrical signal V4. After the amplitude of the third electrical signal V3 differs from the amplitude of the fourth electrical signal V4 for the next T / 2 period, while the amplitude of the fifth electrical signal V5 is the same as the amplitude of the fourth electrical signal V4. Thus, in the narrow viewing angle mode with wide viewing angle, when the first graphical area 110 becomes brighter, the third graphical area 130 becomes darker; and when the first graphical area 110 becomes darker, the third graphical area 130 becomes brighter. This increases the brightness difference between the first graphic area 110 and the third graphic area 130, which is more conducive to interfering with viewing the display image at a wide viewing angle. Even in the case of grayscale inversion, the graphics of the display image cannot be seen, thereby further increasing the anti-peeping effect at a wide viewing angle.

[0108] The third electrical signal V3 can be as follows: Figure 8 The AC signal with constant amplitude as shown; it can also be Figure 14 The amplitude of the AC signal shown is periodically changing. At the same time, the amplitude of the third electrical signal V3 and the amplitude of the fifth electrical signal V5 are preferably different. Therefore, when viewing the display at a wide viewing angle in narrow viewing angle mode, the first graphic area 110, the second graphic area 120, and the third graphic area 130 all periodically flicker at different brightnesses, thereby interfering with viewing the display at a wide viewing angle. Of course, the amplitude of the third electrical signal V3 can be the same as the amplitude of the fifth electrical signal V5.

[0109] Furthermore, the fifth electrical signal V5 is an AC voltage with an amplitude between 1.6V and 2.4V. When the amplitude of the fifth electrical signal V5 is different from the amplitude of the third electrical signal V3, the amplitude difference between the fifth electrical signal V5 and the fourth electrical signal V4 is 0.2V-0.6V.

[0110] It should be understood by those skilled in the art that the remaining structures and working principles of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0111] [Example 4]

[0112] Figure 18 It is a schematic diagram of the planar structure of the display panel in the fourth embodiment of the present invention. Figure 19 Schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the fourth embodiment of the present invention. Figure 18 and Figure 19As shown, the display panel with wide and narrow viewing angles switchable, the driving method, and the display device provided by the fourth embodiment of the present invention are similar to those provided by the first embodiment ( Figures 1 to 13 ) are basically the same as the display panel with switchable wide and narrow viewing angles, the driving method, and the display device. The difference lies in the structure of the display panel. In this embodiment, the first graphic area 110 and the first viewing angle electrode 121 both have multiple rows / columns, that is, the first graphic areas 110 and the first viewing angle electrodes 121 with multiple block structures are distributed in an array.

[0113] This makes the first graphic area 110 more evenly distributed on the display panel. When viewed at narrow or wide viewing angles, the brightness of the first graphic area 110 flickers periodically, which can better interfere with viewing the display image at wide viewing angles and enhance the anti-peeping effect at wide viewing angles.

[0114] It should be understood by those skilled in the art that the remaining structures and working principles of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0115] [Example 5]

[0116] Figure 20 It is a schematic diagram of the planar structure of the display panel in the fifth embodiment of the present invention. Figure 21 Schematic diagram of the planar structure of the first viewing angle electrode and the second viewing angle electrode in the fifth embodiment of the present invention. Figures 20 to 21 As shown, the display panel with wide and narrow viewing angles switchable, the driving method, and the display device provided in the fifth embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 13 ) are substantially the same as the display panel, driving method, and display device with switchable wide and narrow viewing angles in the embodiment described above, differing in the structure of the display panel. In this embodiment, the first graphic area 110, the second graphic area 120, the first viewing angle electrodes 121, and the second viewing angle electrodes 122 are all block structures. The first graphic area 110 and the second graphic area 120 are arranged alternately in rows and columns, and the first viewing angle electrodes 121 and the second viewing angle electrodes 122 are arranged alternately in rows and columns. This results in the first graphic area 110 and the second graphic area 120 being arranged like a mosaic. At narrow and wide viewing angles, the brightness of the first graphic area 110 and the second graphic area 120 periodically flickers, which can significantly interfere with viewing the display at wide viewing angles and enhance the anti-peeping effect at wide viewing angles.

[0117] It should be understood by those skilled in the art that the remaining structures and working principles of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0118] Figure 22 This is one of the planar structural diagrams of the display device in the present invention. Figure 23 This is the second schematic diagram of the planar structure of the display device in the present invention. Figure 22 and Figure 23The display device is provided with a viewing angle switching button 50 for the user to send a viewing angle switching request to the display device. The viewing angle switching button 50 can be a physical button (such as Figure 22 As shown), it can also be a software control or application (APP) to achieve the switching function (as shown Figure 23 As shown, for example, a slider is used to set the wide and narrow viewing angles. When a user needs to switch between a wide viewing angle and a narrow viewing angle, the user can operate the viewing angle switching button 50 to send a viewing angle switching request to the display device. Ultimately, the driver chip 60 controls the application of different electrical signals to the common viewing angle electrode 111, the first viewing angle electrode 121, the second viewing angle electrode 122, and the third viewing angle electrode 125. The display device can then switch between a wide viewing angle and a narrow viewing angle. When switching to a wide viewing angle, the driving method is the driving method corresponding to the wide-angle mode, and when switching to a narrow viewing angle, the driving method is the driving method corresponding to the narrow viewing angle mode. Therefore, the display device according to the embodiment of the present invention has strong operational flexibility and convenience, achieving a multifunctional display device that integrates entertainment video and privacy protection.

[0119] In this document, directional terms such as "up," "down," "left," "right," "front," and "back" are defined based on the positions of structures in the accompanying drawings and their relative positions to each other, for the sake of clarity and convenience in presenting the technical solution. It should be understood that the use of these directional terms does not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein, are used solely for distinctions and are not intended to limit quantity or order.

[0120] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

[0121] Industrial Applicability

[0122] The display panel comprises a first and second graphical areas, and includes a dimming box and a display box stacked one on top of the other. The dimming box comprises a first substrate, a second substrate, and a first liquid crystal layer. The first substrate is provided with a common viewing electrode, and the second substrate is provided with a first and second viewing electrodes cooperating with the common viewing electrode. The first viewing electrode corresponds to the first graphical area, and the second viewing electrode corresponds to the second graphical area. In narrow viewing angle mode, a first electrical signal is applied to the common viewing angle electrode, a third electrical signal is applied to the first viewing angle electrode, and a fourth electrical signal is applied to the second viewing angle electrode. By having the amplitude of the third electrical signal differ from the amplitude of the fourth electrical signal for at least a portion of a period within a cycle, and by periodically varying the amplitude of the third electrical signal, the transmittance of the first graphical area at the same side viewing angle also varies periodically. This means that when viewed from a wide viewing angle, the brightness of the first graphical area appears to flicker, thereby interfering with viewing of the display image at wide viewing angles. Even when grayscale inversion is applied, the displayed image is invisible, thereby enhancing the anti-peeping effect at wide viewing angles.

Claims

1. A driving method with switchable wide and narrow viewing angles, characterized in that: A display panel with switchable wide and narrow viewing angles is provided, wherein the display panel has a first graphic area (110) and a second graphic area (120), and the display panel includes a dimming box (10) and a display box (20) stacked on each other; The dimming box (10) comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11), and a first liquid crystal layer (13) arranged between the first substrate (11) and the second substrate (12); a common viewing angle electrode (111) is provided on a side of the first substrate (11) facing the first liquid crystal layer (13); a first viewing angle electrode (121) and a second viewing angle electrode (122) matched with the common viewing angle electrode (111) are provided on a side of the second substrate (12) facing the first liquid crystal layer (13); the first viewing angle electrode (121) and the second viewing angle electrode (122) are insulated from and spaced apart from each other; the first viewing angle electrode (121) corresponds to the first graphic area (110), and the second viewing angle electrode (122) corresponds to the second graphic area (120); The driving method includes: In a wide viewing angle mode, a first electrical signal (V1) is applied to the common viewing angle electrode (111), and a second electrical signal (V2) is applied to both the first viewing angle electrode (121) and the second viewing angle electrode (122); a voltage difference between the second electrical signal (V2) and the first electrical signal (V1) is less than a first preset value or greater than a second preset value; and the first graphic area (110) and the second graphic area (120) have the same light transmittance at the same side viewing angle; In a narrow viewing angle mode, a first electric signal (V1) is applied to the common viewing angle electrode (111), a third electric signal (V3) is applied to the first viewing angle electrode (121), and a fourth electric signal (V4) is applied to the second viewing angle electrode (122); a voltage difference between the third electric signal (V3) and the first electric signal (V1) and a voltage difference between the fourth electric signal (V4) and the first electric signal (V1) are both greater than a third preset value and less than a fourth preset value; within a period (T), the amplitude of the third electric signal (V3) and the amplitude of the fourth electric signal (V4) are different for at least part of the time, and the amplitude of the third electric signal (V3) varies periodically; and the transmittance of the first graphic area (110) at the same side viewing angle varies periodically; The first preset value is less than or equal to the third preset value, and the second preset value is greater than the fourth preset value.

2. The driving method with switchable wide and narrow viewing angles according to claim 1, characterized in that: Within a period (T), the amplitude of the third electrical signal (V3) is different from the amplitude of the fourth electrical signal (V4), and the amplitude of the fourth electrical signal (V4) changes periodically.

3. The driving method with switchable wide and narrow viewing angles according to claim 1, wherein: The first electrical signal (V1) and the second electrical signal (V2) are both a DC voltage of 0V; or the first electrical signal (V1) is a DC voltage of 0V, and the second electrical signal (V2) is an AC voltage with an amplitude greater than 5V.

4. The driving method with switchable wide and narrow viewing angles according to claim 1, characterized in that: The amplitudes of the third electrical signal (V3) and the fourth electrical signal (V4) are both 1.6V-2.4V, and both are AC voltages.

5. The driving method with switchable wide and narrow viewing angles according to claim 1, wherein: When the amplitude of the third electrical signal (V3) is different from the amplitude of the fourth electrical signal (V4), the amplitude difference between the third electrical signal (V3) and the fourth electrical signal (V4) is 0.2V-0.6V.

6. The driving method with switchable wide and narrow viewing angles according to claim 1, characterized in that: At the same time, the polarity of the third electrical signal (V3) is the same as the polarity of the fourth electrical signal (V4).

7. The driving method with switchable wide and narrow viewing angles according to claim 1, characterized in that: The display panel has a third graphic area (130); a third viewing electrode (125) cooperating with the common viewing electrode (111) is provided on the side of the second substrate (12) facing the first liquid crystal layer (13); the third viewing electrode (125) corresponds to the third graphic area (130); the first viewing electrode (121), the second viewing electrode (122), and the third viewing electrode (125) are insulated from each other; The driving method further includes: In the wide viewing angle mode, the second electric signal (V2) is applied to the third viewing angle electrode (125); in the narrow viewing angle mode, a fifth electric signal (V5) is applied to the third viewing angle electrode (125), the voltage difference between the fifth electric signal (V5) and the first electric signal (V1) is greater than a third preset value and less than a fourth preset value, within a period (T), the amplitude of the fifth electric signal (V5) is different from the amplitude of the third electric signal (V3), and the amplitude of the fifth electric signal (V5) changes periodically.

8. The driving method with switchable wide and narrow viewing angles according to claim 7, characterized in that: The fifth electrical signal (V5) is an AC voltage with an amplitude between 1.6V and 2.4V. When the amplitude of the fifth electrical signal (V5) is different from the amplitude of the third electrical signal (V3), the amplitude difference between the fifth electrical signal (V5) and the fourth electrical signal (V4) is 0.2V-0.6V.

9. A display panel with switchable wide and narrow viewing angles, characterized in that: The display panel is driven by the driving method according to any one of claims 1 to 8, the display panel having a first graphic area (110) and a second graphic area (120), and the display panel includes a dimming box (10) and a display box (20) stacked on each other; The dimming box (10) comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11), and a first liquid crystal layer (13) arranged between the first substrate (11) and the second substrate (12); a common viewing angle electrode (111) is provided on the side of the first substrate (11) facing the first liquid crystal layer (13); a first viewing angle electrode (121) and a second viewing angle electrode (122) matched with the common viewing angle electrode (111) are provided on the side of the second substrate (12) facing the first liquid crystal layer (13); the first viewing angle electrode (121) and the second viewing angle electrode (122) are insulated from each other and spaced apart; the first viewing angle electrode (121) corresponds to the first graphic area (110), and the second viewing angle electrode (122) corresponds to the second graphic area (120).

10. The display panel with switchable wide and narrow viewing angles according to claim 9, wherein: The first graphic area (110) and the first viewing angle electrode (121) are both a plurality of block structures arranged at intervals along a row / column direction; the second graphic area (120) surrounds the outer periphery of the first graphic area (110); and the second viewing angle electrode (122) surrounds the outer periphery of the first viewing angle electrode (121).

11. The display panel with switchable wide and narrow viewing angles according to claim 10, wherein: The first graphic area (110) and the first viewing angle electrode (121) both have multiple rows / columns.

12. The display panel with switchable wide and narrow viewing angles according to claim 9, wherein: The first graphic area (110), the second graphic area (120), the first viewing angle electrode (121) and the second viewing angle electrode (122) are all multiple block structures; the first graphic area (110) and the second graphic area (120) are alternately arranged along the row and column directions; and the first viewing angle electrode (121) and the second viewing angle electrode (122) are alternately arranged along the row and column directions.

13. The display panel with switchable wide and narrow viewing angles according to claim 9, wherein: The display panel has a third graphic area (130); a third viewing electrode (125) cooperating with the common viewing electrode (111) is provided on the side of the second substrate (12) facing the first liquid crystal layer (13); the third viewing electrode (125) corresponds to the third graphic area (130); and the first viewing electrode (121), the second viewing electrode (122) and the third viewing electrode (125) are insulated from each other.

14. The display panel with switchable wide and narrow viewing angles according to claim 13, wherein: The first graphic area (110), the third graphic area (130), the first viewing angle electrode (121) and the third viewing angle electrode (125) are all multiple block structures; the first graphic area (110) and the third graphic area (130) are alternately arranged along the row / column direction; the second graphic area (120) surrounds the periphery of the first graphic area (110) and the third graphic area (130); the first viewing angle electrode (121) and the third viewing angle electrode (125) are alternately arranged along the row / column direction; and the second viewing angle electrode (122) surrounds the periphery of the first viewing angle electrode (121) and the third viewing angle electrode (125).

15. The display panel with switchable wide and narrow viewing angles according to claim 14, wherein: The first graphic area (110) and the third graphic area (130) are arranged alternately along the row and column directions, and the first viewing angle electrode (121) and the third viewing angle electrode (125) are arranged alternately along the row and column directions.

16. The display panel with switchable wide and narrow viewing angles according to claim 9, wherein: An electrode network (123) is provided on a side of the second substrate (12) facing the first liquid crystal layer (13), the electrode network (123) comprising a first electrode network (123a) and a second electrode network (123b) that are insulated from and spaced apart from each other, the first viewing angle electrode (121) being electrically connected to the first electrode network (123a), and the second viewing angle electrode (122) being electrically connected to the second electrode network (123b).

17. A display device, characterized in that: The invention comprises a display panel with switchable wide and narrow viewing angles as described in any one of claims 9 to 16.

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