CN117192823A - Display panel, display device and driving method - Google Patents

Abstract

The application discloses a display panel, a display device and a driving method, wherein the display panel comprises a display box and a dimming box which is laminated on the upper side of the display box, and the display panel is provided with a static pattern display area and a static pattern background area; the dimming box comprises a first substrate, a second substrate and a cholesteric liquid crystal layer arranged between the first substrate and the second substrate, wherein a common viewing angle electrode is arranged on the first substrate, a first viewing angle electrode and a second viewing angle electrode matched with the common viewing angle electrode are arranged on the second substrate, the first viewing angle electrode and the second viewing angle electrode are mutually insulated and spaced, and the pattern of the second viewing angle electrode corresponds to the static pattern display area. Switching between a transparent state and a fog state through the cholesteric liquid crystal layer to realize wide-narrow visual angle switching; the cholesteric liquid crystal layer also has a reflective state, when displaying a static pattern, the static pattern display is realized by using reflected ambient light, and the fog state and the reflective state are maintained without an electric field so as to reduce the power consumption for displaying the static pattern.

Description

Display panel, display device and driving method

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel, a display device, and a driving method.

Background

With the continuous progress of the liquid crystal display technology, the visual angle of the display is widened to more than 160 degrees from about 120 degrees originally, and people want to effectively protect business confidentiality and personal privacy while enjoying the visual experience brought by a large visual angle so as to avoid business loss or embarrassment caused by the leakage of screen information. In addition to the wide viewing angle requirement, there are many occasions where the display device is required to have a function of switching between wide and narrow viewing angles.

At present, a shutter shielding film is attached to a display screen to realize wide and narrow viewing angles, when peep prevention is needed, the viewing angles can be reduced by shielding the screen by using the shutter shielding film, but the shutter shielding film is additionally prepared in the mode, so that great inconvenience is caused to a user, one shutter shielding film can only realize one viewing angle, once the shutter shielding film is attached, the viewing angle is fixed in a narrow viewing angle mode, free switching between the wide viewing angle mode and the narrow viewing angle mode is not realized, and the peep prevention sheet can cause brightness reduction to influence grade.

In addition, when the display of the prior art displays static patterns, the backlight is required to be turned on and an electric signal is required to be applied to the gate driving circuit, so that the power consumption is high.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the application aims to provide a display panel, a display device and a driving method, so as to solve the problem that the prior art cannot realize the wide-narrow visual angle switching function and reduce the power consumption for displaying static patterns.

The aim of the application is achieved by the following technical scheme:

the application provides a display panel, which comprises a display box and a dimming box, wherein the dimming box is laminated on the upper side of the display box, and the display panel is provided with a static pattern display area and a static pattern background area;

the dimming box comprises a first substrate, a second substrate and a cholesteric liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the cholesteric liquid crystal layer is arranged between the first substrate and the second substrate, a common viewing angle electrode is arranged on one side of the first substrate, which faces the cholesteric liquid crystal layer, a first viewing angle electrode and a second viewing angle electrode which are matched with the common viewing angle electrode are arranged on one side of the second substrate, which faces the cholesteric liquid crystal layer, the first viewing angle electrode and the second viewing angle electrode are mutually insulated and are spaced apart, and the pattern of the second viewing angle electrode corresponds to the static pattern display area;

when in a wide visual angle mode, the display box is opened, and all cholesteric liquid crystal layers are in a fog state and have a astigmatism effect; when in a narrow visual angle mode, the display box is opened, and all cholesteric liquid crystal layers are transparent; and when in a static pattern display mode, closing the display box, wherein the cholesteric liquid crystal layer corresponding to the static pattern display area is in one of a fog state and a reflection state, and the cholesteric liquid crystal layer corresponding to the static pattern background area is in the other of the fog state and the reflection state.

Further, the first viewing angle electrode and the second viewing angle electrode are located in different layers, and the first viewing angle electrode is a planar electrode which covers the second substrate in whole.

Further, the pattern of the first viewing angle electrode corresponds to the static pattern background region.

Further, the first viewing angle electrode and the second viewing angle electrode are positioned on different layers, and in the projection direction of the second substrate, the edge of the first viewing angle electrode close to the second viewing angle electrode and the edge of the second viewing angle electrode close to the first viewing angle electrode have a partial overlapping area;

the width of the partially overlapping region is greater than 2um.

Further, the display panel is provided with a black matrix, and the projection area of the partially overlapped area on the second substrate is positioned in the projection area of the black matrix on the second substrate.

Further, the edge of the projection area of the partially overlapped area on the second substrate and the edge of the projection area of the black matrix on the second substrate have a distance, and the distance is larger than 1um.

Further, the first viewing angle electrode and the second viewing angle electrode are located at the same layer and spaced apart from each other.

The application also provides a display device comprising the display panel.

The present application also provides a driving method of a display panel for driving the display panel as described above, the driving method comprising:

when in a narrow viewing angle mode, the display box is opened, a common voltage signal is applied to a common viewing angle electrode, a first electric signal is applied to the first viewing angle electrode and the second viewing angle electrode, the pressure difference between the common voltage signal and the first electric signal is between a first preset value and a second preset value, and all the cholesteric liquid crystal layers are transparent;

when in a wide viewing angle mode, the display box is opened, the common voltage signal is applied to the common viewing angle electrode, a second electric signal is applied to the first viewing angle electrode and the second viewing angle electrode, the pressure difference between the second electric signal and the common voltage signal is between the first preset value and the second preset value, the second electric signal gradually changes to be the same as the common voltage signal in a first preset time, and all the cholesteric liquid crystal layers are in a fog state and have an astigmatism effect;

when in a static pattern display mode, the display box is closed, the common visual angle electrode is used for applying the public voltage signal, the second electric signal is applied to the first visual angle electrode, and the third electric signal is applied to the second visual angle electrode, the pressure difference between the third electric signal and the public voltage signal is between the first preset value and the second preset value, the third electric signal directly changes to be the same as the public voltage signal when in a second preset time, the second preset time is less than the first preset time, the cholesteric liquid crystal layer corresponding to the static pattern background area is in a fog state, and the cholesteric liquid crystal layer corresponding to the static pattern display area is in a reflection state; or, the third electric signal is applied to the first viewing angle electrode and the second electric signal is applied to the second viewing angle electrode, the cholesteric liquid crystal layer corresponding to the static pattern background area is in a reflection state, and the cholesteric liquid crystal layer corresponding to the static pattern display area is in a fog state.

Further, the first preset value is 25V, and the second preset value is 30V; the first preset time is 0.2-1S.

The application has the beneficial effects that: by adopting the cholesteric liquid crystal layer in the dimming box, the cholesteric liquid crystal layer can realize switching between a transparent state and a fog state, thereby realizing wide-narrow visual angle switching; in addition, the cholesteric liquid crystal layer also has a reflection state, and in the static pattern display mode, one of the static pattern display area and the static pattern background area is in a fog state, and the other is in a reflection state, so that static pattern display is realized by utilizing reflected ambient light, and the fog state and the reflection state are maintained without an electric field, so that the power consumption for displaying the static pattern is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a display panel in an initial state according to a first embodiment of the present application;

FIG. 2 is a schematic plan view of a display panel according to a first embodiment of the application;

FIG. 3 is a schematic plan view of a second substrate according to a first embodiment of the application;

FIG. 4 is a signal waveform diagram of a display panel in a narrow viewing angle mode according to an embodiment of the application;

FIG. 5 is a schematic diagram of a display panel in a narrow viewing angle mode according to an embodiment of the application;

FIG. 6 is a signal waveform diagram of a display panel in a wide viewing angle mode according to a first embodiment of the present application;

FIG. 7 is a schematic diagram of a display panel in a wide view mode according to an embodiment of the application;

FIG. 8 is a signal waveform diagram of a display panel in a static pattern display mode according to an embodiment of the application;

FIG. 9 is a schematic diagram of a display panel in a static pattern display mode according to an embodiment of the application;

FIG. 10 is a schematic diagram showing a planar structure of a display panel in a static pattern display mode according to a first embodiment of the present application;

FIG. 11 is a second schematic diagram of a display panel in a static pattern display mode according to the first embodiment of the application;

FIG. 12 is a schematic diagram showing a second planar structure of the display panel in the static pattern display mode according to the first embodiment of the present application;

fig. 13 is a schematic structural diagram of a display panel in an initial state according to a second embodiment of the present application;

FIG. 14 is a schematic view showing a partially enlarged structure of a display panel according to a second embodiment of the application;

fig. 15 is a schematic view of a display panel in an initial state according to a third embodiment of the present application;

FIG. 16 is a schematic view showing a planar structure of a display device according to the present application;

FIG. 17 is a schematic diagram of a second planar structure of the display device according to the present application.

Detailed Description

In order to further describe the technical means and effects adopted by the application to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of the display panel, the display device and the driving method according to the application by combining the accompanying drawings and the preferred embodiment, wherein:

example one

Fig. 1 is a schematic structural diagram of a display panel in an initial state according to a first embodiment of the present application. Fig. 2 is a schematic plan view of a display panel according to a first embodiment of the application. Fig. 3 is a schematic plan view of a second substrate according to a first embodiment of the application.

As shown in fig. 1 to 3, in a display panel according to an embodiment of the application, the display panel has a patterned static pattern display area 120 and a static pattern background area 110, and other areas of the display panel except for the static pattern display area 120 are the static pattern background area 110. The pattern of the static pattern display area 120 may be set according to the pattern that is actually required to be displayed, may be set as a LOGO pattern, or may be set as another pattern (in this embodiment, the letter "V" is used as the pattern that needs to be displayed in the static pattern display area 120). The display panel includes the dimming box 10 and the display box 20 of mutual range upon range of setting, and dimming box 10 locates the top of display box 20, and dimming box 10 is located the light-emitting side of display box 20 promptly, and dimming box 10 is used for controlling display panel's visual angle and static pattern's demonstration, and display box 20 is used for controlling display panel to show normal picture.

The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a cholesteric liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12, wherein the cholesteric liquid crystal layer 13 is capable of switching among a fog state, a transparent state, and a reflective state. The first substrate 11 is provided with a common viewing angle electrode 111 on a side facing the cholesteric liquid crystal layer 13, the second substrate 12 is provided with a first viewing angle electrode 121 and a second viewing angle electrode 122 which are matched with the common viewing angle electrode 111 on a side facing the cholesteric liquid crystal layer 13, the first viewing angle electrode 121 and the second viewing angle electrode 122 are mutually insulated and spaced apart, and the pattern of the second viewing angle electrode 122 corresponds to the static pattern display area 120 (fig. 2 and 3). The states of the static pattern display region 120 and the static pattern background region 110 are controlled by controlling the pressure difference between the common viewing angle electrode 111 and the first viewing angle electrode 121 and the pressure difference between the common viewing angle electrode 111 and the second viewing angle electrode 122, thereby realizing control of wide-narrow viewing angle switching and static pattern display.

Among them, the cholesteric liquid crystal in the cholesteric liquid crystal layer 13 has three stable textures of P-state (Planar, planar texture state, reflective state), FC-state (Focal Conic state, haze state), and H-state (transparent state). The reflection spectrum of the cholesteric liquid crystal is in a visible spectrum section in the P state, the cholesteric liquid crystal reflects bright color light, and the specific reflected color can be set according to the pitch of the cholesteric liquid crystal; when in the FC state, the cholesteric liquid crystal does not reflect the color light any more, and the light can scatter and penetrate the cholesteric liquid crystal; when in the H state, the cholesteric liquid crystal does not reflect the color light any more, and the light can directly penetrate the cholesteric liquid crystal and has no scattering effect on the light. Under the action of a certain electric field, the three states can be mutually converted.

When the cholesteric liquid crystal is set to be in a P state at the beginning, the cholesteric liquid crystal is in a reflection state, the arrangement directions of the cholesteric liquid crystal are different, the reflected visible light spectrums are different, and the residual spectrums are transmitted. The reflectance spectrum band (Δλ) of cholesteric liquid crystals is proportional to the helical moment (Po) and the birefringence (Δn=ne-no) of cholesteric liquid crystals, and the formula is: Δλ=poΔn, so that cholesteric liquid crystals of different pitches can reflect different colors of light in the reflective state. Of course, when the cholesteric liquid crystal is initially set to the FC state, the P-state and the FC state may be maintained without a voltage. After the voltage is applied to the two ends, and the voltage is slowly reduced to zero, the cholesteric liquid crystal rotates and stops in the FC state, which is a scattering state. When the applied voltage is maintained at both ends, the cholesteric liquid crystal rotates and stagnates in the H state, which is the transparent state. After the voltage is applied to the two ends, and the voltage is rapidly reduced to zero, the cholesteric liquid crystal rotates and stops in a P state, which is a reflection state.

In the present embodiment, the first viewing angle electrode 121 and the second viewing angle electrode 122 are located on different layers, the second viewing angle electrode 122 is located on the upper side of the first viewing angle electrode 121, the first viewing angle electrode 121 is a planar electrode that covers the second substrate 12 entirely, and the common viewing angle electrode 111 is a planar electrode that covers the first substrate 11 entirely, so that two etching processes can be reduced, and the manufacturing process is simplified.

In this embodiment, as shown in fig. 2, the static pattern display area 120 is located at the center of the display panel, and other areas of the display panel except for the static pattern display area 120 are static pattern background areas 110. Of course, the position of the static pattern display area 120 may be set according to the position where the pattern is required to be displayed.

In this embodiment, the display cell 20 is preferably a liquid crystal cell. Of course, in other embodiments, the display box 20 may also be a self-luminous display (e.g., OLED display, micro LED display).

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

Further, a first polarizer 31 is disposed between the dimming box 10 and the display box 20, a second polarizer 32 is disposed on a side of the display box 20 away from the dimming box 10, and a transmission axis of the second polarizer 32 is perpendicular to a transmission axis of the first polarizer 31.

The color film substrate 21 is provided with color resist layers 212 arranged in an array manner, and a black matrix 211 is arranged on the color resist layers 212 at intervals. The color resist layer 212 includes red (R), green (G), and blue (B) color resist materials, and corresponds to the sub-pixels forming the three colors red (R), green (G), and blue (B). The black matrix 211 is stripe-shaped, and has a black matrix 211 extending in a lateral direction and covering the scan lines and a black matrix 211 extending in a longitudinal direction and covering the data lines, respectively. The edges of the second viewing angle electrode 122 may be located in the black matrix 211, that is, the edges of the second viewing angle electrode 122 are blocked by the black matrix 211, so as to block the problem of unclear edge image of the cholesteric liquid crystal at the edges of the electrodes due to irregular arrangement.

The array substrate 22 is defined by a plurality of scan lines (not shown) and a plurality of data lines (not shown) on a side facing the liquid crystal layer 23, which are insulated from each other, to form a plurality of pixel units, and each pixel unit is provided therein with a pixel electrode 222 and a thin film transistor (not shown), and the pixel electrode 222 is electrically connected to the data line adjacent to the thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, wherein the gate electrode and the scan line are disposed on the same layer and electrically connected, the gate electrode and the active layer are separated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the pixel electrode 222 are electrically connected by a contact hole.

As shown in fig. 1, in the present embodiment, a common electrode 221 is further disposed on a side of the array substrate 22 facing the liquid crystal layer 23, and the common electrode 221 and the pixel electrode 222 are located on different layers and are insulated and isolated by an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 (the common electrode 221 is shown below the pixel electrode 222 in fig. 1). Preferably, the common electrode 221 is a planar electrode disposed over the entire surface, and the pixel electrode 222 is a slit electrode having a plurality of electrode bars within each pixel unit to form a fringe field switching pattern (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located at the same layer, but they are insulated from each other, each of the pixel electrode 222 and the common electrode 221 may include a plurality of electrode bars, and the electrode bars of the pixel electrode 222 and the electrode bars of the common electrode 221 are alternately arranged with each other to form an In-Plane Switching (IPS); alternatively, in other embodiments, the array substrate 22 is provided with the pixel electrode 222 on a side facing the liquid crystal layer 23, and the color film substrate 21 is provided with the common electrode 221 on a side facing the liquid crystal layer 23 to form a TN mode or a VA mode.

The first substrate 11, the second substrate 12, the color film substrate 21, and the array substrate 22 may be made of glass, acrylic, polycarbonate, or the like. The materials of 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 may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), or the like.

The application also provides a display device, which comprises the display panel and the backlight module 40, wherein the backlight module 40 is positioned below the display panel and is used for providing a backlight source for the display panel. Of course, if the display case 20 employs a self-luminous display, no additional backlight is required.

The backlight module 40 includes a backlight 41 and a peep-proof layer 43, wherein the peep-proof layer 43 is used for reducing the range of the light emitting angle. A brightness enhancement film 42 is further disposed between the backlight 41 and the peep-proof layer 43, and the brightness enhancement film 42 increases the brightness of the backlight module 40. The peep-proof layer 43 is a micro shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through the shutter structure, and the angle range of the light passing through the peep-proof layer 43 is reduced. The peep-proof layer 43 comprises a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and light-absorbing materials are arranged on two sides of the light-resisting walls. Of course, the backlight 41 may be a light-collecting type backlight, so that the peep-proof layer 43 is not required, but the light-collecting type backlight is more expensive than a conventional backlight. The backlight module 40 may be a side-in type backlight module or a direct type backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL, collimated backlight) mode, which can collect light to ensure display effect.

The present application also provides a driving method for driving the display panel as described above, the driving method comprising:

fig. 4 is a signal waveform diagram of the display panel in the narrow viewing angle mode according to the first embodiment of the application. Fig. 5 is a schematic structural diagram of a display panel in a narrow viewing angle mode according to a first embodiment of the present application. As shown in fig. 4 and 5, in the narrow viewing angle mode, the display box 20 is turned on while the backlight module 40 is turned on. The common voltage signal Vcom is applied to the common viewing angle electrode 111, the first electric signal V1 is applied to both the first viewing angle electrode 121 and the second viewing angle electrode 122, the voltage difference between the common voltage signal Vcom and the first electric signal V1 is between the first preset value and the second preset value, a strong vertical electric field is formed between the first substrate 11 and the second substrate 12, all the cholesteric liquid crystal layers 13 rotate and stagnate in the H state (transparent state), light can directly pass through the cholesteric liquid crystal layers 13, and the angle of the light is not changed, thereby realizing narrow viewing angle display.

Fig. 6 is a signal waveform diagram of the display panel in the wide viewing angle mode according to the first embodiment of the application. Fig. 7 is a schematic structural diagram of a display panel in a wide viewing angle mode according to a first embodiment of the application. As shown in fig. 6 and 7, in the wide viewing angle mode, the display box 20 is turned on while the backlight module 40 is turned on. The common voltage signal Vcom is applied to the common viewing angle electrode 111, the second electric signal V2 is applied to both the first viewing angle electrode 121 and the second viewing angle electrode 122, the voltage difference between the second electric signal V2 and the common voltage signal Vcom is between the first preset value and the second preset value, and the second electric signal V2 gradually becomes the same as the common voltage signal Vcom in the first preset time, that is, a strong vertical electric field is formed between the first substrate 11 and the second substrate 12, and then the vertical electric field slowly disappears, so that all the cholesteric liquid crystal layers 13 are in a fog state and have a astigmatism effect, thereby realizing wide viewing angle display.

Fig. 8 is a signal waveform diagram of the display panel in the static pattern display mode according to the first embodiment of the application. Fig. 9 is a schematic diagram of a display panel in a static pattern display mode according to a first embodiment of the application. Fig. 10 is a schematic plan view of a display panel in a static pattern display mode according to an embodiment of the application. As shown in fig. 8 to 10, in the static pattern display mode, the display box 20 is turned off, and the backlight module 40 is turned off. The common viewing angle electrode 111 applies the common voltage signal Vcom, the second electric signal V2 is applied to the first viewing angle electrode 121, and the third electric signal V3 is applied to the second viewing angle electrode 122, the voltage difference between the third electric signal V3 and the common voltage signal Vcom is between the first preset value and the second preset value, and the third electric signal V3 directly changes to be the same as the common voltage signal Vcom at the second preset time, which is smaller than the first preset time, that is, a stronger vertical electric field is formed between the first substrate 11 and the second substrate 12, then the vertical electric field rapidly disappears, so that the cholesteric liquid crystal layer 13 corresponding to the static pattern background area 110 is in a fog state, and the cholesteric liquid crystal layer 13 corresponding to the static pattern display area 120 is in a reflection state, and the brightness of the static pattern background area 110 and the static pattern display area 120 is different, so that a pattern corresponding to the static pattern display area 120 is displayed, and the color of the static pattern display is the same as the color of the cholesteric liquid crystal layer 13.

FIG. 11 is a second schematic diagram of a display panel in a static pattern display mode according to the first embodiment of the application. Fig. 12 is a schematic diagram of a second planar structure of the display panel in the static pattern display mode according to the first embodiment of the application. As shown in fig. 8, 11 and 12, the third electric signal V3 may be applied to the first viewing angle electrode 121, and the second electric signal V2 may be applied to the second viewing angle electrode 122, so that the cholesteric liquid crystal layer 13 corresponding to the static pattern background region 110 is in a reflective state, the cholesteric liquid crystal layer 13 corresponding to the static pattern display region 120 is in a fog state, and the brightness of the static pattern background region 110 and the static pattern display region 120 are the same, so that a pattern corresponding to the static pattern display region 120 is displayed, but the color of the static pattern background region 110 is the same as the color reflected by the cholesteric liquid crystal layer 13, and the static pattern is displayed in gray.

Wherein, in the narrow viewing angle mode and the wide viewing angle mode, a common voltage is applied to the common electrode 221, 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, and a vertical electric field is generated, positive liquid crystal molecules in the liquid crystal layer 23 deflect in the vertical direction, the gray scale voltage comprises 0-255 gray scale voltages, and when different gray scale voltages are applied to the pixel electrode 222, the pixel unit presents different brightness, so that different pictures are displayed in the narrow viewing angle mode and the wide viewing angle mode. In the static pattern display mode, however, since the display cell 20 is in the off state, no voltage needs to be applied to the common electrode 221 and the pixel electrode 222.

In the present embodiment, the common voltage signal Vcom is a 0 vdc voltage. The first preset value is 25V, the second preset value is 30V, the first preset time is 0.2-1S, namely the first electric signal V1, the second electric signal V2 and the third electric signal V3 are all 25V-30V, only the second electric signal V2 is slowly reduced to 0V in the first preset time, and the third electric signal V3 is rapidly reduced to 0V in the second preset time. The first electric signal V1, the second electric signal V2 and the third electric signal V3 are square waves with the frequency of 50-60 Hz.

Example two

Fig. 13 is a schematic structural diagram of a display panel in an initial state according to a second embodiment of the present application. Fig. 14 is a schematic view of a partially enlarged structure of a display panel according to a second embodiment of the application. As shown in fig. 13 and 14, the display panel, the display device and the driving method according to the second embodiment of the present application are substantially the same as those of the first embodiment (fig. 1 to 12), except that in the present embodiment:

the pattern of the first viewing angle electrode 121 corresponds to the static pattern background area 110, and the first viewing angle electrode 121 and the second viewing angle electrode 122 are positioned on different layers, so that the opposite capacitance of the first viewing angle electrode 121 and the second viewing angle electrode 122 is effectively reduced, charging loading is reduced, charging efficiency is improved, and power consumption is further saved; since the transmittance of the transparent electrode is between 88% and 92%, the overlapping area of the first viewing angle electrode 121 and the second viewing angle electrode 122 is reduced, and the transmittance can be effectively improved.

Further, in the projection direction of the second substrate 12, an edge of the first viewing angle electrode 121 near the second viewing angle electrode 122 and an edge of the second viewing angle electrode 122 near the first viewing angle electrode 121 have a partial overlap region. Wherein the width a of the partially overlapped region is greater than 2um, so that the cholesteric liquid crystal layer 13 at the edge of the second viewing angle electrode 122 can be effectively controlled.

Further, the projection area of the partially overlapped area on the second substrate 12 is located in the projection area of the black matrix 211 on the second substrate 12, that is, the partially overlapped area is blocked by the black matrix 211, so as to improve the display effect. The edge of the projection area of the partially overlapped area on the second substrate 12 and the edge of the projection area of the black matrix 211 on the second substrate 12 have a distance b, and the distance b is larger than 1um.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Example III

Fig. 15 is a schematic structural diagram of a display panel in an initial state in a third embodiment of the present application. As shown in fig. 15, a display panel, a display device and a driving method according to a third embodiment of the present application are substantially the same as those of the first embodiment (fig. 1 to 12), except that in the present embodiment:

the pattern of the first viewing angle electrode 121 corresponds to the static pattern background area 110, and the first viewing angle electrode 121 and the second viewing angle electrode 122 are positioned on the same layer and are spaced apart from each other, so that the opposite capacitance of the first viewing angle electrode 121 and the second viewing angle electrode 122 is effectively avoided, charging loading is reduced, charging efficiency is improved, and power consumption is further saved; since the transmittance of the transparent electrode is between 88% and 92%, the first viewing angle electrode 121 and the second viewing angle electrode 122 are prevented from having an overlapping region, and the transmittance can be effectively improved. Furthermore, the first viewing angle electrode 121 and the second viewing angle electrode 122 have no overlapping area, and the boundary of the static pattern is clearer. In addition, the first viewing angle electrode 121 and the second viewing angle electrode 122 are located on the same layer, and can be etched by using the same transparent electrode layer, so that the manufacturing process is greatly simplified. If the static pattern has a closed pattern, a notch may be provided in the closed pattern to facilitate signal extraction from the second viewing angle electrode 122 within the closed pattern.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Fig. 16 is a schematic view of a display device according to the present application, and fig. 17 is a schematic view of a display device according to the present application. Referring to fig. 16 and 17, the display device is provided with a display mode switching key 50 for a user to issue a viewing angle switching request to the display device. The display mode switching key 50 may be a physical key (as shown in fig. 16) or may be a software control or Application (APP) to implement a switching function (as shown in fig. 17, for example, a slider bar to set a wide and narrow viewing angle). When the user needs to switch between the wide viewing angle, the narrow viewing angle and the static pattern display, the display device can switch between the wide viewing angle, the narrow viewing angle and the static pattern display by operating the display mode switching key 50 to send a mode switching request to the display device and finally controlling the driving chip 60 to apply different electric signals to the common viewing angle electrode 111, the first viewing angle electrode 121, the second viewing angle electrode 122 and the display box 20. When the wide view angle is switched, the driving method adopts a driving method corresponding to a wide angle mode; when switching to a narrow viewing angle, the driving method adopts a driving method corresponding to a narrow viewing angle mode; when the display is switched to the static pattern display, the driving method adopts the driving method corresponding to the static pattern display mode. Therefore, the display device provided by the embodiment of the application has stronger operation flexibility and convenience, and achieves the aim of integrating entertainment video and privacy confidentiality.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present application is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims (10)

1. A display panel, characterized in that the display panel comprises a display box (20) and a dimming box (10) laminated on the upper side of the display box (20), and the display panel is provided with a static pattern display area (120) and a static pattern background area (110);

the light regulating box (10) comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11) and a cholesteric liquid crystal layer (13) arranged between the first substrate (11) and the second substrate (12), wherein a common viewing angle electrode (111) is arranged on one side of the first substrate (11) facing the cholesteric 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 arranged on one side of the second substrate (12) facing the cholesteric liquid crystal layer (13), the first viewing angle electrode (121) and the second viewing angle electrode (122) are mutually insulated and spaced, and the pattern of the second viewing angle electrode (122) corresponds to the static pattern display area (120);

in a wide viewing angle mode, the display box (20) is opened, and all cholesteric liquid crystal layers (13) are in a fog state and have a light scattering effect; in a narrow viewing angle mode, opening the display cell (20), all of the cholesteric liquid crystal layers (13) being in a transparent state; and when in a static pattern display mode, the display box (20) is closed, the cholesteric liquid crystal layer (13) corresponding to the static pattern display area (120) is in one of a fog state and a reflection state, and the cholesteric liquid crystal layer (13) corresponding to the static pattern background area (110) is in the other of the fog state and the reflection state.

2. The display panel according to claim 1, wherein the first viewing angle electrode (121) and the second viewing angle electrode (122) are located in different layers, and the first viewing angle electrode (121) is a planar electrode that entirely covers the second substrate (12).

3. The display panel according to claim 1, characterized in that the pattern of the first viewing angle electrode (121) corresponds to the static pattern background region (110).

4. A display panel according to claim 3, characterized in that the first viewing angle electrode (121) and the second viewing angle electrode (122) are located in different layers, an edge of the first viewing angle electrode (121) close to the second viewing angle electrode (122) and an edge of the second viewing angle electrode (122) close to the first viewing angle electrode (121) having a partially overlapping area in a projection direction of the second substrate (12);

the width of the partially overlapping region is greater than 2um.

5. The display panel according to claim 4, characterized in that the display panel has a black matrix (211) thereon, the projection area of the partially overlapping area on the second substrate (12) being located within the projection area of the black matrix (211) on the second substrate (12).

6. The display panel according to claim 5, characterized in that the edge of the projection area of the partially overlapping area on the second substrate (12) has a spacing from the edge of the projection area of the black matrix (211) on the second substrate (12), the spacing being larger than 1um.

7. A display panel according to claim 3, characterized in that the first viewing angle electrode (121) and the second viewing angle electrode (122) are located in the same layer and are spaced apart from each other.

8. A display device comprising the display panel according to any one of claims 1-7.

9. A driving method of a display panel, characterized by being used for driving the display panel according to any one of claims 1 to 7, the driving method comprising:

in a narrow viewing angle mode, the display box (20) is opened, a common voltage signal (Vcom) is applied to a common viewing angle electrode (111), a first electric signal (V1) is applied to both the first viewing angle electrode (121) and the second viewing angle electrode (122), the voltage difference between the common voltage signal (Vcom) and the first electric signal (V1) is between a first preset value and a second preset value, and all cholesteric liquid crystal layers (13) are in a transparent state;

in a wide viewing angle mode, the display box (20) is opened, the common voltage signal (Vcom) is applied to the common viewing angle electrode (111), a second electric signal (V2) is applied to both the first viewing angle electrode (121) and the second viewing angle electrode (122), the voltage difference between the second electric signal (V2) and the common voltage signal (Vcom) is between the first preset value and the second preset value, the second electric signal (V2) gradually changes to be the same as the common voltage signal (Vcom) in a first preset time, and all the cholesteric liquid crystal layers (13) are in a fog state and have an astigmatic effect;

in a static pattern display mode, closing the display box (20), wherein the common viewing angle electrode (111) applies the common voltage signal (Vcom), the second electric signal (V2) is applied to the first viewing angle electrode (121), and a third electric signal (V3) is applied to the second viewing angle electrode (122), a pressure difference between the third electric signal (V3) and the common voltage signal (Vcom) is between the first preset value and the second preset value, the third electric signal (V3) directly changes to be the same as the common voltage signal (Vcom) in a second preset time, the second preset time is smaller than the first preset time, the cholesteric liquid crystal layer (13) corresponding to the static pattern background region (110) is in a fog state, and the cholesteric liquid crystal layer (13) corresponding to the static pattern display region (120) is in a reflection state; alternatively, the third electric signal (V3) is applied to the first viewing angle electrode (121) and the second electric signal (V2) is applied to the second viewing angle electrode (122), the cholesteric liquid crystal layer (13) corresponding to the static pattern background region (110) is in a reflective state, and the cholesteric liquid crystal layer (13) corresponding to the static pattern display region (120) is in a fog state.

10. The driving method according to claim 9, wherein the first preset value is 25V and the second preset value is 30V; the first preset time is 0.2-1S.