CN112068340A - Display panel with switchable viewing angles, display device and driving method - Google Patents
Display panel with switchable viewing angles, display device and driving method Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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Abstract
The invention discloses a display panel with switchable visual angles, a display device and a driving method, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal layer, a pixel area for displaying pictures and a visual angle control area for controlling the visual angles are arranged on the display panel, a first polarizing device is arranged on the array substrate, a second polarizing device is arranged on the color film substrate, and a polarizing axis of the first polarizing device is vertical to a polarizing axis of the second polarizing device in an area corresponding to the pixel area; in the area corresponding to the visual angle control area, the polarization axis of the first polarization device is parallel to the polarization axis of the second polarization device; the array substrate is provided with a common electrode, a pixel electrode and a visual angle control electrode, the pixel electrode corresponds to the pixel area, the visual angle control electrode corresponds to the visual angle control area, and the color film substrate is provided with an opposite electrode covering the pixel area and the visual angle control area. The invention improves the narrow visual angle effect and has better peep-proof effect in a darker environment.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a display device, and a driving method capable of switching viewing angles.
Background
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Therefore, in addition to the requirement of wide viewing angle, in many cases, the display device is required to have the function of switching between wide and narrow viewing angles.
At present mainly take attached tripe barrier film on the display screen to realize the switching of wide narrow visual angle, when needs peep-proof, utilize the tripe barrier film to cover the screen and can reduce the visual angle, but this kind of mode needs additionally to prepare the tripe barrier film, can cause very big inconvenience for the user, and a tripe barrier film can only realize a visual angle, in case after the attached tripe barrier film, the visual angle is just fixed in narrow visual angle mode, lead to can't freely switch between wide visual angle mode and narrow visual angle mode, and the peep-proof piece can cause the luminance to reduce and influence the display effect.
In one of the prior art, a vertical electric field is applied to liquid crystal molecules by using a viewing angle control electrode on one side of a color film substrate (CF) of a single liquid crystal cell, so that the liquid crystal molecules deflect and tilt in a vertical direction to form dark state light leakage, and the contrast is reduced at a large viewing angle to achieve an anti-peeping effect, so that switching between a wide viewing angle and a narrow viewing angle can be achieved by controlling the voltage on the viewing angle control electrode, but the display panel usually needs to be matched with a backlight module with a light-receiving function to improve the anti-peeping effect at the narrow viewing angle; in the second prior art, a light-dimming liquid crystal cell is arranged above a common display panel to form a dual-cell peep-proof structure, and a peep-proof effect is achieved through the light-collecting effect of the light-dimming liquid crystal cell when the display panel is watched at a large viewing angle.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings in the prior art, the present invention provides a display panel, a display device and a driving method for switching a viewing angle, so as to solve one or more of the problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
the invention provides a display panel with switchable visual angles, which comprises a color film substrate, an array substrate and a liquid crystal layer, wherein the array substrate is arranged opposite to the color film substrate, the liquid crystal layer is positioned between the color film substrate and the array substrate, a pixel area for displaying pictures and a visual angle control area for controlling the visual angles are arranged on the display panel, a first polarizing device is arranged on the array substrate, a second polarizing device is arranged on the color film substrate, and a polarizing axis of the first polarizing device is vertical to a polarizing axis of the second polarizing device in an area corresponding to the pixel area; in the area corresponding to the visual angle control area, the polarization axis of the first polarization device is parallel to the polarization axis of the second polarization device; the array substrate is provided with a common electrode, a pixel electrode and a visual angle control electrode, the pixel electrode corresponds to the pixel area, the visual angle control electrode corresponds to the visual angle control area, and the color film substrate is provided with an opposite electrode covering the pixel area and the visual angle control area;
in the wide viewing angle mode, liquid crystal molecules in the liquid crystal layer corresponding to the pixel region are in a lying posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control region are in a lying posture or a standing posture;
in a first narrow viewing angle mode, liquid crystal molecules in the liquid crystal layer corresponding to the pixel region are in a lying posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control region are in a tilted posture;
in the second narrow viewing angle mode, liquid crystal molecules in the liquid crystal layer corresponding to the pixel region are in a tilted posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control region are in a tilted posture.
Further, the first polarization device comprises a first polarization plate and a first polarization rotation structure, the first polarization rotation structure corresponds to the visual angle control area and is arranged between the first polarization plate and the liquid crystal layer, the first polarization rotation structure is used for rotating the polarization direction of linearly polarized light passing through the first polarization plate by 90 degrees, the second polarization device is a polarization plate, and the polarization axis of the first polarization plate is perpendicular to the polarization axis of the second polarization device.
Further, the first polarization rotating structure comprises a first quarter-wave plate and a first wire grid polarizer, the first quarter-wave plate is arranged between the first wire grid polarizer and the first polarizer, an included angle between a transmission axis of the first quarter-wave plate and a polarization axis of the first polarizer is 45 degrees, and the wire grid of the first wire grid polarizer is perpendicular to the polarization axis of the second polarizer.
Further, the second polarization device comprises a second polarizer and a second polarization rotating structure, the second polarization rotating structure corresponds to the viewing angle control area and is arranged between the second polarizer and the liquid crystal layer, the second polarization rotating structure is used for rotating the polarization direction of the linearly polarized light passing through the liquid crystal layer by 90 degrees, the first polarization device is a polarizer, and the polarization axis of the second polarizer is perpendicular to the polarization axis of the first polarization device.
Further, the second polarization rotating structure comprises a second quarter-wave plate and a second wire grid polarizer, the second quarter-wave plate is arranged between the second wire grid polarizer and the second polarizer, an included angle between a transmission axis of the second quarter-wave plate and a wire grid direction of the second wire grid polarizer is 45 degrees, and the wire grid direction of the second wire grid polarizer is perpendicular to a polarization axis of the first polarization device.
Furthermore, the opposite electrode is arranged on one side of the color film substrate facing the liquid crystal layer, is of a whole-surface structure and covers the pixel area and the visual angle control area; or the opposite electrode includes a first electrode and a second electrode insulated from each other, the first electrode corresponding to the viewing angle control region, the second electrode corresponding to the pixel region.
Furthermore, a color resistance layer corresponding to the pixel region and a black matrix separating the pixel region from the viewing angle control region are arranged on the color film substrate, and the region of the color film substrate corresponding to the viewing angle control region is in a transparent state.
Further, the pixel regions and the viewing angle control regions extend in the transverse direction and are alternately arranged in the longitudinal direction, or the pixel regions and the viewing angle control regions extend in the longitudinal direction and are alternately arranged in the transverse direction.
The invention also provides a display device which comprises the display panel with switchable viewing angles.
The present invention also provides a driving method switchable in viewing angle for driving a display panel switchable in viewing angle as described above, the driving method comprising:
when in a wide viewing angle mode, preset wide viewing angle voltage signals are added to the common electrode, the viewing angle control electrode and the opposite electrode, so that liquid crystal molecules in the liquid crystal layer corresponding to the pixel area are in a lying posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control area are in a lying posture or a standing posture;
when the liquid crystal display device is in a first narrow viewing angle mode, a preset first narrow viewing angle voltage signal is added to the common electrode, the viewing angle control electrode and the opposite electrode, so that liquid crystal molecules in the liquid crystal layer corresponding to the pixel area are in a lying posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control area are in an inclined posture;
when the liquid crystal display device is in the second narrow viewing angle mode, a preset second narrow viewing angle voltage signal is applied to the common electrode, the viewing angle control electrode and the opposite electrode, so that liquid crystal molecules in the liquid crystal layer corresponding to the pixel area are in an inclined posture, and liquid crystal molecules in the liquid crystal layer corresponding to the viewing angle control area are in an inclined posture.
The invention has the beneficial effects that: through setting up different wide and narrow visual angle switching structure in pixel district and visual angle control area, thereby the pixel district makes big visual angle light leak realize narrow visual angle when narrow visual angle, thereby the visual angle control area makes big visual angle receive light when narrow visual angle and realizes narrow visual angle, under the environment of closing lamp or darkroom, two kinds of narrow visual angle effects in pixel district and visual angle control area combine together, can strengthen the narrow visual angle effect under the environment of closing lamp or darkroom, and can not increase the thickness of display panel, also need not the special backlight unit of collocation, can reduce cost of manufacture and display panel thickness.
Drawings
Fig. 1 is a schematic plan structure diagram of a color film substrate according to a first embodiment of the present invention;
fig. 2 is a schematic plan view of an array substrate according to an embodiment of the invention;
FIG. 3 is a schematic plan view of a viewing angle control electrode according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a display panel along a data line in an initial state according to an embodiment of the invention;
FIG. 5 is a schematic cross-sectional view of a display panel along a data line direction in a wide viewing angle state according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a display panel along a data line direction in a first narrow viewing angle state according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view illustrating a viewing angle control area of a display panel along a scanning direction in a first narrow viewing angle state according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a display panel along a data line direction in a second narrow viewing angle state according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a first polarization rotation structure according to a first embodiment of the present invention;
FIG. 10 is a schematic representation of a wire grid polarizer in accordance with an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a display panel along a data line in an initial state according to a second embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view of a display panel along a data line direction in a wide viewing angle state according to a second embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view of a display panel along a data line direction in a first narrow viewing angle state according to a second embodiment of the present invention;
FIG. 14 is a schematic cross-sectional view of a display panel along a data line direction in a second narrow viewing angle state according to a second embodiment of the present invention;
FIG. 15 is a schematic cross-sectional view of a display panel in an initial state along a data line according to a third embodiment of the present invention;
fig. 16 is a schematic cross-sectional view of a second polarization rotation structure in the third embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of specific embodiments, structures, features and effects of the display panel, the display device and the driving method with switchable viewing angles according to the present invention with reference to the accompanying drawings and preferred embodiments:
[ example one ]
Fig. 1 is a schematic plan structure diagram of a color filter substrate according to a first embodiment of the present invention, fig. 2 is a schematic plan structure diagram of an array substrate according to a first embodiment of the present invention, fig. 3 is a schematic plan structure diagram of a viewing angle control electrode according to a first embodiment of the present invention, fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present invention in an initial state along a data line direction, fig. 5 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present invention in a wide viewing angle state along the data line direction, fig. 6 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present invention in a first narrow viewing angle state along the data line direction, fig. 7 is a schematic cross-sectional structure diagram of a viewing angle control area according to a first embodiment of the present invention in a first narrow viewing angle state along a scanning direction, fig. 8 is a schematic cross-sectional structure diagram of, fig. 9 is a schematic cross-sectional structure diagram of a first polarization rotation structure in a first embodiment of the present invention, and fig. 10 is a schematic principle diagram of a wire grid polarizer in the first embodiment of the present invention.
As shown in fig. 1 to 10, a display panel with switchable viewing angles according to an embodiment of the present invention includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20. In this embodiment, positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy are used in the liquid crystal layer 23. As shown in fig. 4, in the initial state, the positive liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the color filter substrate 10 and the array substrate 20, and the alignment directions of the positive liquid crystal molecules near the color filter substrate 10 and the positive liquid crystal molecules near the array substrate 20 are antiparallel. The positive liquid crystal molecules in the liquid crystal layer 30 may have a smaller initial pretilt angle with the color film substrate 10 and the array substrate 20, and the range of the initial pretilt angle may be less than or equal to 5 degrees, that is: 0 DEG & ltoreq.theta & ltoreq.5 DEG to reduce a response time for the positive liquid crystal molecules to deflect in a vertical direction.
The display panel has a pixel region P for displaying an image and a viewing angle control region V for controlling a viewing angle, the array substrate 20 is provided with a first polarizer 40, and the color film substrate 10 is provided with a second polarizer 50. In the region corresponding to the pixel region P, the polarization axis of the first polarizing means 40 is perpendicular to the polarization axis of the second polarizing means 50; in the region corresponding to the viewing angle control region V, the polarization axis of the first polarizing means 40 is parallel to the polarization axis of the second polarizing means 50. The array substrate 20 is provided with a common electrode 21, a pixel electrode 22 and a viewing angle control electrode 23, the pixel electrode 22 corresponds to the pixel region P, the viewing angle control electrode 23 corresponds to the viewing angle control region V, the color film substrate 10 is provided with an opposite electrode 13 covering the pixel region P and the viewing angle control region V, and the opposite electrode 13 is respectively matched with the common electrode 21 and the viewing angle control electrode 23 to form a vertical electric field. Certainly, in other embodiments, the common electrode 21 on the array substrate 20 at the position corresponding to the viewing angle control region V may also be omitted, and a vertical electric field is formed between the viewing angle control electrode 23 and the color filter substrate, in addition, the viewing angle control electrode 23 may also be located below the insulating layer, so as to avoid short circuit occurring due to too close distance between the color filter substrate 10 and the array substrate 20.
As shown in fig. 1, in this embodiment, a Black Matrix (BM)11 and a color-resist layer 12 are disposed on a color film substrate 10, the color-resist layer 12 corresponds to a pixel region P, and a region of the color film substrate 10 corresponding to a viewing angle control region V is in a transparent state, that is, a region corresponding to the viewing angle control region V is not provided with a color-resist material or is provided with a transparent color-resist material. The black matrix 11 spaces the pixel region P from the viewing angle control region V. The color resist layer 12 includes, for example, color resist materials of three colors of red (R), green (G), and blue (B), and sub-pixels of the three colors of red, green, and blue are formed correspondingly. Of course, in other embodiments, the color resist layer 12 may also be disposed in a region of the color film substrate 10 corresponding to the viewing angle control region V, and the viewing angle control region V corresponds to the color of the color resist layer 12 in the pixel region P in the vertical direction.
Further, the pixel regions P and the viewing angle control regions V extend in the transverse direction (the scanning line 1) and are alternately arranged in the longitudinal direction (the data line 2), and the distance between the pixel regions P and the viewing angle control regions V is 7-13 μm, that is, the width of the black matrix 11 between the pixel regions P and the viewing angle control regions V is 7-13 μm, preferably 10 μm. Of course, the pixel regions P and the viewing angle control regions V may also extend in the longitudinal direction and be alternately arranged in the lateral direction.
In this embodiment, the array substrate 20 is further provided with a plurality of scan lines 1 and a plurality of data lines 2 which are insulated and crossed with each other on a side facing the liquid crystal layer 30, the scan lines 1 and the data lines 2 are covered by the projection of the black matrix 11 on the array substrate 20, a pixel electrode 22 and a thin film transistor 3 are arranged in each corresponding pixel region P, and the pixel electrode 22 is electrically connected with the data line 2 adjacent to the thin film transistor 3 through the thin film transistor 3. The thin film transistor 3 includes a gate electrode, an active layer, a drain electrode and a source electrode, the gate electrode and the scanning line 1 are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode is electrically connected with the data line 2, and the drain electrode is electrically connected with the pixel electrode 22 through a contact hole.
Further, the common electrode 21 and the pixel electrode 22 are located at different layers and insulated and isolated by an insulating layer, and the viewing angle control electrode 23 and the pixel electrode 22 are located at the same layer. The common electrode 21 may be located above or below the pixel electrode 22 (the common electrode 21 is shown below the pixel electrode 22 in fig. 4). Preferably, the common electrode 21 is a planar electrode disposed over the entire surface, and the pixel electrode 22 is a block electrode disposed in one block in each pixel unit or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the pixel electrode 22 and the common electrode 21 are located on the same layer, but they are insulated and isolated from each other, and each of the pixel electrode 22 and the common electrode 21 may include a plurality of electrode stripes, and the electrode stripes of the pixel electrode 22 and the electrode stripes of the common electrode 21 are alternately arranged with each other to form an In-Plane Switching (IPS) mode.
Further, the array substrate 20 is further provided with a conductive portion 24 (fig. 3) in the non-display region corresponding to the display panel, and the conductive portion 24 electrically connects the plurality of viewing angle control electrodes 23 together and applies the same viewing angle control voltage.
In this embodiment, the first polarizer 40 includes a first polarizer 41 and a first polarization rotating structure 42, the first polarization rotating structure 42 corresponds to the viewing angle control region V and is disposed between the first polarizer 41 and the liquid crystal layer 30, the first polarization rotating structure 42 is configured to rotate the polarization direction of the linearly polarized light passing through the first polarizer 41 by 90 °, the second polarizer 50 is a polarizer, and the polarization axis of the first polarizer 41 is perpendicular to the polarization axis of the second polarizer 50. Preferably, the first polarization rotation structure 42 is directly disposed on the surface of the array substrate 20 facing the liquid crystal layer 30, and then the first polarization rotation structure 42 is covered by a planarization layer. Of course, in other embodiments, the first polarizer 40 may also be composed of two polarizers with perpendicular polarization axes, wherein one polarizer covers the pixel region P, the other polarizer covers the viewing angle control region V, and the second polarizer 50 is a polarizer.
Further, the first polarization rotating structure 42 includes a first quarter-wave plate 421 and a first wire grid polarizer 422, the first quarter-wave plate (λ/4)421 is disposed between the first wire grid polarizer 422 and the first polarizer 41, an included angle between a transmission axis of the first quarter-wave plate 421 and a polarization axis of the first polarizer 41 is 45 °, and a wire grid of the first wire grid polarizer 422 is perpendicular to the polarization axis of the second polarizer 50. Of course, in other embodiments, the first polarization rotation structure 42 may be a compensation film, for example, a compensation film formed by using liquid crystal molecules and twisting them by 90 °, and then fixing the liquid crystal molecules, which is similar to the TN display mode.
As shown in fig. 10, in which the wire grid polarizer (the first wire grid polarizer 422) has a special polarization characteristic of transmitting polarized light perpendicular to the wire grid extending direction (running direction) and reflecting polarized light parallel to the wire grid extending direction, the wire grid polarizer is preferably made of metal, and the wire grid polarizer can be printed by using a nanoimprint technology (or other related technologies). Of the incident light ray a, the polarization direction of the light ray has a first polarization a1 perpendicular to the wire grid extending direction and a second polarization a2 parallel to the wire grid extending direction, while the first polarization a1 perpendicular to the wire grid extending direction can form a transmission light ray C through the wire grid polarizer, and the second polarization a2 parallel to the wire grid extending direction can be reflected to form a reflection light ray B. The wire grid polarizer is described in more detail with reference to the prior art and will not be described in detail herein.
In this embodiment, for example, the polarization axis of the first polarizer 41 is 0 °, the transmission axis of the first quarter-wave plate 421 is 45 °, the wire grid of the first wire grid polarizer 422 is oriented to be 0 °, and the polarization axis of the second polarizer 50 is 90 °. When the backlight passes through the first polarizer 41, it forms 0 ° polarized light, and passes through the first quarter-wave plate 421 to become circularly polarized light, passes through the first wire grid polarizer 422 to become 90 ° polarized light, and then passes through the liquid crystal layer 30 and exits from the second polarizer 50.
Further, the opposite electrode 13 includes a first electrode 131 and a second electrode 132 spaced apart from each other, the first electrode 131 corresponding to the viewing angle control region V, and the second electrode 132 corresponding to the pixel region P. The first electrode 131 is for cooperating with the viewing angle control electrode 23 and forming a vertical electric field, and the second electrode 132 is for cooperating with the common electrode 21 and forming a vertical electric field.
The color film substrate 10 and the array substrate 20 may be made of transparent substrates such as glass, acrylic acid, and polycarbonate. The common electrode 21, the pixel electrode 22, and the viewing angle control electrode 23 may be made of a transparent electrode such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).
The present embodiment also provides a driving method switchable in viewing angle, for driving a display panel switchable in viewing angle as described above, the driving method including:
as shown in fig. 5, in the wide viewing angle mode, a predetermined wide viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the first electrode 131, the second electrode 132 and the common electrode 21 is 0V, and a smaller voltage (less than 0.6V) or a larger voltage (greater than 5V) is applied to the viewing angle control electrode 23, at this time, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are in the lying posture, and the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in the lying posture or the standing posture. When a small voltage is applied to the viewing angle control electrode 23, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in a lying posture; when a large voltage is applied to the viewing angle control electrode 23, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in a standing posture (approximately perpendicular to the color filter substrate 10 and the array substrate 20). And gray scale voltage of 0-255 is applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 5) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in the horizontal direction and are in a scattering state, thereby realizing image display in a wide viewing angle mode.
As shown in fig. 6 and 7, in the first narrow viewing angle mode, a preset first narrow viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the first electrode 131, the second electrode 132 and the common electrode 21 is 0V, and a viewing angle control voltage (2-3V) is applied to the viewing angle control electrode 23, at this time, liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are in a flat posture, a vertical electric field (E2 in fig. 6 and 7) is formed between the viewing angle control electrode 23 and the first electrode 131, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in an inclined posture under the driving of the vertical electric field, and a light receiving state (black state) is obtained when the display panel is viewed at a large viewing angle, so that narrow viewing angle display is realized without the need of a special backlight module. And gray scale voltages of 0-255 are applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 6) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in the horizontal direction, thereby realizing image display in the first narrow viewing angle mode.
As shown in fig. 8, in the second narrow viewing angle mode, a preset second narrow viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the first electrode 131 and the common electrode 21 is 0V, and the viewing angle control voltage (2-3V) is applied to the viewing angle control electrode 23 and the second electrode 132, and at this time, a vertical electric field (E3 in fig. 8) is formed between the second electrode 132 and the common electrode 21, and the liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are driven by the vertical electric field to be in a tilted posture. A vertical electric field (E2 in fig. 8) is formed between the viewing angle control electrode 23 and the first electrode 131, liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are driven by the vertical electric field to be in an inclined posture, when the display panel is viewed at a large viewing angle, the pixel region P is in a light leakage state (bright state), and the liquid crystal in the viewing angle control region V is tilted to be in a light receiving state (black state), so that narrow viewing angle display is realized, and a narrow viewing angle effect is also better in a light-off or dark-room environment. And gray scale voltages of 0-255 are applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 8) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in a horizontal direction in a tilted state, thereby realizing image display in the second narrow viewing angle mode.
[ example two ]
Fig. 11 is a schematic cross-sectional structure view of a display panel in an initial state along a data line direction according to a second embodiment of the present invention, fig. 12 is a schematic cross-sectional structure view of the display panel in a wide viewing angle state along the data line direction according to the second embodiment of the present invention, fig. 13 is a schematic cross-sectional structure view of the display panel in a first narrow viewing angle state along the data line direction according to the second embodiment of the present invention, and fig. 14 is a schematic cross-sectional structure view of the display panel in a second narrow viewing angle state along the data line direction according to the second embodiment of the present invention. As shown in fig. 11 to 14, the display panel with switchable viewing angles according to the second embodiment of the present invention is substantially the same as the display panel with switchable viewing angles according to the first embodiment (fig. 1 to 10), except that in this embodiment, the opposite electrode 13 is disposed on a side of the color filter substrate 10 facing the liquid crystal layer 30, and the opposite electrode 13 is of a full-surface structure and covers the pixel region P and the viewing angle control region V.
The present embodiment also provides a driving method switchable in viewing angle, for driving a display panel switchable in viewing angle as described above, the driving method including:
as shown in fig. 12, in the wide viewing angle mode, a preset wide viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the opposite electrode 13 and the common electrode 21 is 0V, and a smaller voltage (less than 0.6V) or a larger voltage (greater than 5V) is applied to the viewing angle control electrode 23, at this time, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are in the lying posture, and the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in the lying posture or the standing posture. When a small voltage is applied to the viewing angle control electrode 23, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in a lying posture; when a large voltage is applied to the viewing angle control electrode 23, the liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in a standing posture (approximately perpendicular to the color filter substrate 10 and the array substrate 20). And gray scale voltages of 0-255 are applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 12) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in the horizontal direction, thereby realizing image display in the wide viewing angle mode.
As shown in fig. 13, in the first narrow viewing angle mode, a preset first narrow viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the opposite electrode 13 and the common electrode 21 is 0V, and a viewing angle control voltage (2-3V) is applied to the viewing angle control electrode 23, at this time, liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are in a lying posture, a vertical electric field (E2 in fig. 13) is formed between the viewing angle control electrode 23 and the opposite electrode 13, liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are in an inclined posture under the driving of the vertical electric field, and a display panel is in a light receiving state (black state) when viewed at a large viewing angle, so that narrow viewing angle display is realized, and a special backlight module is not needed. And gray scale voltages of 0-255 are applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 13) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in the horizontal direction, thereby realizing image display in the first narrow viewing angle mode.
As shown in fig. 14, in the second narrow viewing angle mode, a preset second narrow viewing angle voltage signal is applied to the common electrode 21, the viewing angle control electrode 23 and the opposite electrode 13, for example, the voltage applied to the viewing angle control electrode 23 and the common electrode 21 is 0V, and the viewing angle control voltage (2-3V) is applied to the opposite electrode 13, so that a vertical electric field (E3 in fig. 14) is formed between the opposite electrode 13 and the common electrode 21, and the liquid crystal molecules in the liquid crystal layer 30 corresponding to the pixel region P are driven by the vertical electric field to be in a tilted posture. A vertical electric field (E4 in fig. 14) is formed between the counter electrode 13 and the viewing angle control electrode 23, liquid crystal molecules in the liquid crystal layer 30 corresponding to the viewing angle control region V are driven by the vertical electric field to be in an oblique posture, when the display panel is viewed at a large viewing angle, the pixel region P is in a light leakage state (bright state), and the viewing angle control region V is in a light receiving state (black state), so that narrow viewing angle display is realized, and a narrow viewing angle effect is also better in a light-off or dark-room environment. And gray scale voltages of 0-255 are applied to the pixel electrode 22, so that a horizontal electric field (E1 in fig. 14) is formed between the pixel electrode 22 and the common electrode 21, and liquid crystal molecules corresponding to the pixel region P are deflected in the horizontal direction, thereby realizing image display in the second narrow viewing angle mode.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ third example ]
Fig. 15 is a schematic cross-sectional structure view of the display panel in the initial state along the data line direction in the third embodiment of the invention, and fig. 16 is a schematic cross-sectional structure view of the second polarization rotation structure in the third embodiment of the invention. As shown in fig. 15 and fig. 16, a display panel switchable between viewing angles according to a third embodiment of the present invention is substantially the same as the display panel switchable between viewing angles according to the first embodiment (fig. 1 to fig. 10), except that in this embodiment, the second polarizing device 50 includes a second polarizing plate 51 and a second polarization rotating structure 52, the second polarization rotating structure 52 corresponds to the viewing angle control region V and is disposed between the second polarizing plate 51 and the liquid crystal layer 30, the second polarization rotating structure 52 is used for rotating the polarization direction of linearly polarized light passing through the liquid crystal layer 30 by 90 °, the first polarizing device 40 is a polarizing plate, and the polarization axis of the second polarizing plate 51 is perpendicular to the polarization axis of the first polarizing device 40. Of course, in other embodiments, the second polarizer 50 may also be composed of two polarizers with perpendicular polarization axes, wherein one polarizer covers the pixel region P, the other polarizer covers the viewing angle control region V, and the first polarizer 40 is a polarizer.
Further, the second polarization rotation structure 52 includes a second quarter-wave plate 521 and a second wire grid polarizer 522, the second quarter-wave plate 521 is disposed between the second wire grid polarizer 522 and the second polarizer 51, an included angle between a transmission axis of the second quarter-wave plate 521 and a wire grid of the second wire grid polarizer 522 is 45 °, and a wire grid of the second wire grid polarizer 522 is perpendicular to a polarization axis of the first polarization device 40. Of course, in other embodiments, the second polarization rotation structure 52 may be a compensation film, for example, a compensation film formed by using liquid crystal molecules and twisting them by 90 °, and then fixing the liquid crystal molecules, which is similar to the TN display mode. For the principle of the second wire grid polarizer 522, please refer to the first embodiment, which is not described herein.
In the present embodiment, for example, the polarization axis of the first polarizer 40 is 0 °, the wire grid of the second wire grid polarizer 522 is oriented at 90 °, the transmission axis of the second quarter-wave plate 521 is 45 °, and the polarization axis of the second polarizer 51 is 90 °. When the backlight passes through the first polarizer 40, it forms 0 ° polarized light, passes through the liquid crystal layer 30, may continue to pass through the second wire grid polarizer 522, passes through the second quarter-wave plate 521, becomes circularly polarized light, and then exits from the second polarizer 51 to form 90 ° polarized light. When the polarization axis of the first polarizing means 40 is 90 °, the wire grid of the second wire grid polarizer 55 runs 0 °, and the polarization axis of the second polarizer 51 is 0 °.
Further, the second polarization rotation structure 52 is directly disposed on the surface of the color filter substrate 10 facing the liquid crystal layer 30, and then the second polarization rotation structure 52 is covered by a planarization layer.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
The present embodiment further provides a display device, which further includes a backlight module 60 and the display panel with switchable viewing angles as described above, where the backlight module 60 includes a backlight source and a multi-layer optical film (e.g., a diffusion sheet, a prism sheet, and a brightness enhancement film). Of course, the backlight module 60 may further include a peep-proof layer for reducing the range of the light emitting angle. The peep-proof layer is a micro shutter structure, and can block light rays with a large incident angle, so that light rays with a small incident angle can pass through the peep-proof layer, and the angle range of the light rays passing through the peep-proof layer is reduced. The peep-proof layer comprises a plurality of light resistance walls arranged in parallel and light holes positioned between every two adjacent light resistance walls, and light absorption materials are arranged on two sides of each light resistance wall. The backlight module 60 may be a side-in type backlight module, or may be a collimating type backlight module.
In this document, the terms of upper, lower, left, right, front, rear and the like are used to define the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display panel with switchable visual angles comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a liquid crystal layer (30) positioned between the color film substrate (10) and the array substrate (20), and is characterized in that the display panel is provided with a pixel region (P) for displaying pictures and a visual angle control region (V) for controlling the visual angles, the array substrate (20) is provided with a first polarizing device (40), the color film substrate (10) is provided with a second polarizing device (50), and in an area corresponding to the pixel region (P), the polarizing axis of the first polarizing device (40) is vertical to the polarizing axis of the second polarizing device (50); in the area corresponding to the visual angle control area (V), the polarization axis of the first polarization device (40) is parallel to the polarization axis of the second polarization device (50); a common electrode (21), a pixel electrode (22) and a viewing angle control electrode (23) are arranged on the array substrate (20), the pixel electrode (22) corresponds to the pixel region (P), the viewing angle control electrode (23) corresponds to the viewing angle control region (V), and an opposite electrode (13) covering the pixel region (P) and the viewing angle control region (V) is arranged on the color film substrate (10);
in the wide viewing angle mode, liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) are in a lying posture, and liquid crystal molecules in the liquid crystal layer (30) corresponding to the viewing angle control region (V) are in a lying posture or a standing posture;
in a first narrow viewing angle mode, liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) are in a lying posture, and liquid crystal molecules in the liquid crystal layer (30) corresponding to the viewing angle control region (V) are in a tilted posture;
in a second narrow viewing angle mode, liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) are in a tilted posture, and liquid crystal molecules in the liquid crystal layer (30) corresponding to the viewing angle control region (V) are in a tilted posture.
2. A switchable viewing angle display panel according to claim 1, wherein the first polarizing means (40) comprises a first polarizing plate (41) and a first polarization rotating structure (42), the first polarization rotating structure (42) corresponds to the viewing angle control region (V) and is disposed between the first polarizing plate (41) and the liquid crystal layer (30), the first polarization rotating structure (42) is used for rotating the polarization direction of the linearly polarized light passing through the first polarizing plate (41) by 90 °, the second polarizing means (50) is a polarizing plate, and the polarization axis of the first polarizing plate (41) is perpendicular to the polarization axis of the second polarizing means (50).
3. A switchable viewing angle display panel according to claim 2, wherein the first polarization rotation structure (42) comprises a first quarter-wave plate (421) and a first wire grid polarizer (422), the first quarter-wave plate (421) is disposed between the first wire grid polarizer (422) and the first polarizer (41), an included angle between a transmission axis of the first quarter-wave plate (421) and a polarization axis of the first polarizer (41) is 45 °, and a wire grid of the first wire grid polarizer (422) is perpendicular to the polarization axis of the second polarizer (50).
4. A switchable viewing angle display panel according to claim 1, wherein the second polarizing means (50) comprises a second polarizing plate (51) and a second polarization rotation structure (52), the second polarization rotation structure (52) corresponds to the viewing angle control region (V) and is disposed between the second polarizing plate (51) and the liquid crystal layer (30), the second polarization rotation structure (52) is used for rotating the polarization direction of the linearly polarized light passing through the liquid crystal layer (30) by 90 °, the first polarizing means (40) is a polarizing plate, and the polarization axis of the second polarizing plate (51) is perpendicular to the polarization axis of the first polarizing means (40).
5. A switchable viewing angle display panel according to claim 4, characterized in that the second polarization rotation structure (52) comprises a second quarter-wave plate (521) and a second wire grid polarizer (522), the second quarter-wave plate (521) is arranged between the second wire grid polarizer (522) and the second polarizer (51), the transmission axis of the second quarter-wave plate (521) forms an angle of 45 ° with the wire grid of the second wire grid polarizer (522), and the wire grid of the second wire grid polarizer (522) forms an orientation perpendicular to the polarization axis of the first polarization means (40).
6. The switchable viewing angle display panel of claim 1, wherein the opposite electrode (13) is disposed on a side of the color filter substrate (10) facing the liquid crystal layer (30), and the opposite electrode (13) is of a full-surface structure and covers the pixel region (P) and the viewing angle control region (V); or the opposite electrode (13) includes a first electrode (131) and a second electrode (132) insulated from each other, the first electrode (131) corresponding to the viewing angle control region (V), the second electrode (132) corresponding to the pixel region (P).
7. The display panel with switchable viewing angles according to claim 1, wherein a color resist layer (12) corresponding to the pixel region (P) and a black matrix (11) for separating the pixel region (P) from the viewing angle control region (V) are disposed on the color filter substrate (10), and a region of the color filter substrate (10) corresponding to the viewing angle control region (V) is in a transparent state.
8. A switchable viewing angle display panel according to claim 1, wherein the pixel regions (P) and the viewing angle control regions (V) extend in a transverse direction and are alternately arranged in a longitudinal direction, or the pixel regions (P) and the viewing angle control regions (V) extend in a longitudinal direction and are alternately arranged in a transverse direction.
9. A display device comprising the viewing-angle switchable display panel according to any one of claims 1 to 8.
10. A driving method for switchable viewing angle, the driving method being used for driving a display panel switchable in viewing angle according to any one of claims 1 to 8, the driving method comprising:
when in the wide view angle mode, preset wide view angle voltage signals are applied to the common electrode (21), the view angle control electrode (23) and the opposite electrode (13) to enable liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) to be in a lying posture, and liquid crystal molecules in the liquid crystal layer (30) corresponding to the view angle control region (V) to be in a lying posture or a standing posture;
when in a first narrow viewing angle mode, a preset first narrow viewing angle voltage signal is applied to the common electrode (21), the viewing angle control electrode (23) and the opposite electrode (13) to enable liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) to be in a lying posture, and liquid crystal molecules in the liquid crystal layer (30) corresponding to the viewing angle control region (V) to be in a tilted posture;
in a second narrow viewing angle mode, a predetermined second narrow viewing angle voltage signal is applied to the common electrode (21), the viewing angle control electrode (23) and the opposite electrode (13) to make liquid crystal molecules in the liquid crystal layer (30) corresponding to the pixel region (P) in a tilted posture and liquid crystal molecules in the liquid crystal layer (30) corresponding to the viewing angle control region (V) in a tilted posture.
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| US12044942B2 (en) | 2021-01-13 | 2024-07-23 | Huizhou China Star Optoelectronics Display Co., Ltd. | Array substrate and liquid crystal display panel with main an sub-pixel electrodes configured for liquid crystal alignmnet within wide and narrow viewing angles |
| CN113900288A (en) * | 2021-10-09 | 2022-01-07 | 昆山龙腾光电股份有限公司 | Display device and control method |
| CN113900288B (en) * | 2021-10-09 | 2023-08-29 | 昆山龙腾光电股份有限公司 | Display device and control method |
| CN114371567A (en) * | 2022-03-22 | 2022-04-19 | 惠科股份有限公司 | Display panel and display device |
| CN116338995A (en) * | 2023-04-21 | 2023-06-27 | 昆山龙腾光电股份有限公司 | Display panel with switchable wide and narrow viewing angles, driving method and display device |
| CN116338995B (en) * | 2023-04-21 | 2024-10-29 | 昆山龙腾光电股份有限公司 | Display panel with switchable wide and narrow viewing angles, driving method and display device |
| CN116910830A (en) * | 2023-09-14 | 2023-10-20 | 深圳市东陆科技有限公司 | Rotatable display module based on knob and user interface input method and system thereof |
| CN116910830B (en) * | 2023-09-14 | 2023-12-01 | 深圳市东陆科技有限公司 | Rotatable display module based on knob and user interface input method and system thereof |
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