CN108490702B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
- Publication number
- CN108490702B CN108490702B CN201810258833.6A CN201810258833A CN108490702B CN 108490702 B CN108490702 B CN 108490702B CN 201810258833 A CN201810258833 A CN 201810258833A CN 108490702 B CN108490702 B CN 108490702B
- Authority
- CN
- China
- Prior art keywords
- substrate
- electrode layer
- liquid crystal
- light
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 109
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 106
- 239000010408 film Substances 0.000 claims description 20
- 239000010409 thin film Substances 0.000 claims description 12
- 238000002834 transmittance Methods 0.000 abstract description 6
- 230000010287 polarization Effects 0.000 description 28
- 230000005684 electric field Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 235000019557 luminance Nutrition 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
Abstract
The application discloses a display panel, a driving method thereof and a display device, which are used for controlling emergent rays without using a polarizing film, reducing the cost of a display product and improving the transmittance of the display product. In the display panel provided in the embodiment of the present application, the sub-pixel unit includes: the light converging structure, the third electrode layer and the first light shading layer of the light converging structure far away from the liquid crystal layer; the orthographic projection of the light converging structure on the substrate covers the orthographic projection of the light incoming region on the substrate, and the geometric center of the orthographic projection of the light incoming region on the substrate is superposed with the geometric center of the orthographic projection of the first light shielding layer on the substrate; the long axes of the liquid crystal molecules are parallel to the substrate in an initial state, the long axes of the liquid crystal molecules are vertical to the substrate in a dark state, an arch pattern is formed in a region of the bright liquid crystal layer close to the array substrate, and the long axes of the liquid crystal molecules in a region close to the color film substrate are parallel to the substrate; the refractive index of the liquid crystal molecules in the long axis direction is equal to that of the light converging structure, and the refractive index of the liquid crystal molecules in the short axis direction is smaller than that of the light converging structure.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
The liquid crystal display has a series of advantages of high color gamut, lightness, thinness, fast response time and the like, and is a display device used in large scale at present. Liquid crystal display has a mature technology in the aspects of theoretical research and actual process, but the display basic principle is realized by utilizing the polarization plate modulation of liquid crystal to polarized light, one display panel needs an upper polarization plate and a lower polarization plate, the liquid crystal changes the polarization state of light rays, so that one part of polarized light can be emitted, the other part of polarized light cannot be emitted, and the control of the emitted light rays is realized. In summary, the liquid crystal display product in the prior art needs a polarizer, which affects the transmittance of the liquid crystal display product and increases the cost of the liquid crystal display product.
Disclosure of Invention
The embodiment of the application provides a display panel, a driving method thereof and a display device, which are used for controlling emergent rays without using a polarizing film, reducing the cost of display products and improving the transmittance of the display products.
The embodiment of the application provides a display panel, includes: the display panel is divided into an array of sub-pixel units, and each sub-pixel unit comprises:
the first electrode layer and the second electrode layer are arranged on the substrate of the array substrate and are insulated from each other;
the light converging structure, the third electrode layer and the first light shielding layer are arranged on one side, close to the liquid crystal layer, of the color film substrate, the orthographic projection of the light converging structure on the substrate covers the orthographic projection of the light incoming area of the sub-pixel unit on the substrate, the first light shielding layer is positioned on one side, far away from the liquid crystal layer, of the light converging structure, and the geometric center of the orthographic projection of the first light shielding layer on the substrate is superposed with the geometric center of the orthographic projection of the light converging structure on the substrate;
in the sub-pixel units, the long axes of liquid crystal molecules in the liquid crystal layer are parallel to the substrate in an initial state, the long axes of the liquid crystal molecules are perpendicular to the substrate in a dark state, a plurality of arch patterns are formed in the area, close to the array substrate, of the liquid crystal layer in a bright state, and the long axes of the liquid crystal molecules in the other areas, close to the color film substrate, are parallel to the substrate; the refractive index of the liquid crystal molecules in the long axis direction is equal to that of the light converging structure, and the refractive index of the liquid crystal molecules in the short axis direction is smaller than that of the light converging structure.
According to the display panel provided by the embodiment of the application, the structure formed by the first electrode layer, the second electrode layer, the light convergence structure, the third electrode layer and the liquid crystal layer can replace a polarizer to realize modulation of polarized light. Specifically, in a dark state, the long axis of the liquid crystal molecules is perpendicular to the substrate, the refractive index of the liquid crystal molecules relative to incident natural light is no, the refractive index difference exists between the light converging structure and the liquid crystal layer, and after the collimated backlight source is incident, two polarization states of the natural light are focused to the first light shielding layer by the light converging structure; in a bright state, a plurality of arch patterns are formed in the area of the liquid crystal layer close to the array substrate, the liquid crystal molecules forming the arch patterns have different optical path differences at different positions in the direction vertical to the substrate, so that the liquid crystal molecules forming the arch patterns can be equivalent to a grating structure, after collimated natural light enters, one polarization state can be modulated by the grating structure, the long axes of the liquid crystal molecules in the rest area close to the color film substrate are parallel to the substrate, the refractive index of the liquid crystal molecules in the area is the same as that of the light converging structure, the light converging structure does not act on the light in the polarization state, the light in the polarization state is modulated and deflected by the grating structure, the light which is not absorbed by the first light shielding layer exits through the area outside the first light shielding layer, and the deflection degree of the polarization state can be controlled by controlling the height of the arch of the equivalent grating, the light absorption amount of the first light shielding layer is controlled, the light emitting brightness of the region outside the first light shielding layer is further controlled, and the other polarization state is not modulated by the grating structure and is focused to the first light shielding layer by the light converging structure; therefore, the display panel can realize the modulation of polarized light under the condition of not using a polarizing film, the manufacturing cost of the display panel can be reduced, the transmittance of the display panel can be improved, the display effect of the display panel is improved, and the user experience is improved.
Optionally, the first electrode layer and the second electrode layer are different layers;
the first electrode layer comprises first strip-shaped sub-electrodes which are arranged periodically, the second electrode layer comprises second strip-shaped sub-electrodes which are arranged periodically, and the first strip-shaped sub-electrodes and the second strip-shaped sub-electrodes are arranged alternately.
Optionally, the first electrode layer is located between the second electrode layer and the substrate;
the first electrode layer comprises a whole layer of planar electrodes, and the second electrode layer comprises second strip-shaped sub-electrodes which are arranged periodically.
In this way, no matter the first electrode layer is a planar electrode arranged in a whole layer or comprises periodically arranged strip-shaped sub-electrodes, intervals exist between the second strip-shaped sub-electrodes, and the orthographic projection of the first electrode layer on the substrate covers the orthographic projection of the intervals on the substrate. In this way, when different voltages are applied to the first electrode layer and the second electrode layer, an arc electric field is formed in the area of the liquid crystal layer close to the array substrate, so that liquid crystal molecules can form a plurality of arc patterns.
Optionally, the sub-pixel unit further includes: a second light shielding layer arranged on the substrate of the array substrate and positioned below the first electrode layer and the second electrode layer; the second light shielding layer is provided with a hollow pattern forming the light incoming area.
The light incoming area of the sub-pixel unit can be controlled to be matched with the size of the light converging structure by arranging the second light shielding layer.
Optionally, the light converging structure is a converging lens, and a distance between the first light shielding layer and the converging lens is equal to a focal length of the converging lens.
When the first shading layer is located on the focal plane of the convergent lens, the area of the first shading layer is the smallest, so that the first shading layer can be prevented from being visible as far as possible, and the display effect of the display panel is improved.
Optionally, the third electrode layer is disposed between the light converging structure and the first light shielding layer.
Optionally, the thickness of the liquid crystal layer is greater than 10 microns. Therefore, the first electrode layer, the second electrode layer and the third electrode layer can be provided with voltage in a bright state, the area of the liquid crystal layer close to the array substrate is driven to form a plurality of arch patterns, liquid crystal molecules in the rest area close to the color film substrate are not driven, and the long axes of the liquid crystal molecules are parallel to the substrate.
Optionally, the sub-pixel unit further includes: the array substrate comprises a first thin film transistor and a second thin film transistor, wherein the first thin film transistor is arranged on the array substrate and connected with the first electrode layer, and the second thin film transistor is connected with the second electrode layer.
Thus, the first electrode layer and the second electrode layer can be supplied with voltage signals through the first thin film transistor and the second thin film transistor, respectively.
The embodiment of the application provides a driving method of a display panel, which comprises the following steps:
determining the display brightness currently required by each sub-pixel unit of the display panel;
and providing voltage signals for the first electrode layer, the second electrode layer and the third electrode layer in each sub-pixel unit according to the relationship among the predetermined brightness of the sub-pixel unit, the voltage of the first electrode layer, the voltage of the second electrode layer and the voltage of the third electrode layer, so that each sub-pixel unit emits light with required display brightness.
The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram taken along section AA' of FIG. 1 according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating an arrangement of liquid crystals in a dark liquid crystal layer of a display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic arrangement diagram of liquid crystal molecules of a bright liquid crystal layer of a display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic view of another display panel structure provided in the embodiment of the present application;
fig. 6 is a schematic diagram illustrating an orthographic projection of a first strip-shaped sub-electrode on a substrate and an orthographic projection of a second strip-shaped sub-electrode on the substrate of a display panel according to an embodiment of the present application;
fig. 7 is a schematic view of another display panel structure provided in the embodiment of the present application;
fig. 8 is a flowchart illustrating a display panel driving method according to an embodiment of the present disclosure.
Detailed Description
An embodiment of the present application provides a display panel, including: as shown in fig. 1, the display panel is divided into sub-pixel units 19 distributed in an array, and taking a schematic cross-sectional view of the sub-pixel along AA' in fig. 1 as an example, as shown in fig. 2, the sub-pixel units include:
the first electrode layer 4 and the second electrode layer 5 are arranged on the substrate 1 of the array substrate and are insulated from each other, and the light convergence structure 7, the third electrode layer 8 and the first shading layer 10 are arranged on one side, close to the liquid crystal layer 6, of the color film substrate; the orthographic projection of the light converging structure 7 on the substrate 1 covers the orthographic projection of the light incoming area 2 of the sub-pixel unit on the substrate 1, the first light shielding layer 10 is positioned on one side, away from the liquid crystal layer 6, of the light converging structure 7, and the geometric center of the orthographic projection of the first light shielding layer 10 on the substrate 1 is coincident with the geometric center of the orthographic projection of the light converging structure 7 on the substrate 1;
in the sub-pixel unit, as shown in fig. 2, long axes of liquid crystal molecules 13 in the liquid crystal layer 6 are parallel to the substrate 1 in an initial state, as shown in fig. 3, long axes of the liquid crystal molecules 13 are perpendicular to the substrate 1 in a dark state, as shown in fig. 4, a plurality of arch patterns are formed in a region 18, close to the array substrate, of the liquid crystal layer 6 in a bright state, and long axes of the liquid crystal molecules 13 in a region 17, close to the color filter substrate, are parallel to the substrate 1; the refractive index ne of the liquid crystal molecules 13 in the long axis direction is equal to the refractive index of the light converging structure 7, and the refractive index no of the liquid crystal molecules 13 in the short axis direction is smaller than the refractive index of the light converging structure 7.
According to the display panel provided by the embodiment of the application, the structure formed by the first electrode layer, the second electrode layer, the light convergence structure, the third electrode layer and the liquid crystal layer can replace a polarizer to realize modulation of polarized light. Specifically, in a dark state, the long axes of the liquid crystal molecules are perpendicular to the substrate, the liquid crystal molecules are arranged in a manner of being vertical to the substrate under the action of an electric field, the refractive index of the liquid crystal molecules relative to incident natural light is no, the refractive index difference exists between the light converging structure and the liquid crystal layer, and after the collimated backlight source is incident, two polarization states of the natural light are focused to the first light shielding layer by the light converging structure; in a bright state, a plurality of arch patterns are formed in the area of the liquid crystal layer close to the array substrate, the liquid crystal molecules forming the arch patterns have different optical path differences at different positions in the direction vertical to the substrate, so that the liquid crystal molecules forming the arch patterns can be equivalent to a grating structure, after collimated natural light enters, one polarization state can be modulated by the grating structure, the long axes of the liquid crystal molecules in the rest area close to the color film substrate are parallel to the substrate, the refractive index of the liquid crystal molecules in the area is the same as that of the light converging structure, the light converging structure does not act on the light in the polarization state, the light in the polarization state is modulated and deflected by the grating structure, the light which is not absorbed by the first light shielding layer exits through the area outside the first light shielding layer, and the deflection degree of the polarization state can be controlled by controlling the height of the arch of the equivalent grating, the light absorption amount of the first light shielding layer is controlled, the light emitting brightness of the region outside the first light shielding layer is further controlled, and the other polarization state is not modulated by the grating structure and is focused to the first light shielding layer by the light converging structure; therefore, the display panel can realize the modulation of polarized light under the condition of not using a polarizing film, the manufacturing cost of the display panel can be reduced, the transmittance of the display panel can be improved, the display effect of the display panel is improved, and the user experience is improved.
Note that the display panel may include R, G, B subpixels, for example. In fig. 2, the first insulating layer 14 is provided between the first electrode layer and the second electrode layer, between the first electrode layer and the substrate, and between the sub-electrode layers.
Optionally, in the display panel shown in fig. 2 to 4 provided in this embodiment of the present application, the first electrode layer 4 is located between the second electrode layer 5 and the substrate 1; the first electrode layer 4 comprises a planar electrode arranged in a whole layer, and the second electrode layer 5 comprises second strip-shaped sub-electrodes 11 arranged periodically.
Naturally, the first electrode layer and the second electrode layer may be arranged in other manners, alternatively, as shown in fig. 5, the first electrode layer 4 and the second electrode layer 5 are different layers, and the first insulating layer 14 may be arranged between the first electrode layer 4 and the second light shielding layer 3; the first electrode layer 4 comprises first strip-shaped sub-electrodes 16 arranged periodically, the second electrode layer 5 comprises second strip-shaped sub-electrodes 11 arranged periodically, and the first strip-shaped sub-electrodes 16 and the second strip-shaped sub-electrodes 11 are arranged alternately. That is, as shown in fig. 6, the orthographic projections of the first strip-shaped sub-electrodes 16 on the substrate alternate with the orthographic projections of the second strip-shaped sub-electrodes 11 on the substrate.
For one sub-pixel unit, different first strip-shaped sub-electrodes are loaded with the same voltage signal, and different second strip-shaped sub-electrodes are loaded with the same voltage signal. Alternatively, the period of the first strip-shaped sub-electrodes may be equal to the period of the second strip-shaped sub-electrodes, the period of the first strip-shaped sub-electrodes and the period of the second strip-shaped sub-electrodes being smaller than 10 micrometers. For example, the period of the first strip-shaped sub-electrodes and the period of the second strip-shaped sub-electrodes may be 7 micrometers, the spacing between the second strip-shaped sub-electrodes is less than 50 percent of the electrode, the width of the second strip-shaped sub-electrodes is 3 micrometers, and the spacing between the second strip-shaped sub-electrodes is 4 micrometers.
In fig. 2 and 5, regardless of whether the first electrode layer is a planar electrode provided as a whole layer or includes periodically arranged strip-shaped sub-electrodes, the second strip-shaped sub-electrodes 11 have spaces 12 therebetween, and the orthographic projection of the first electrode layer 4 on the substrate 1 covers the orthographic projection of the spaces 12 on the substrate. In this way, when different voltages are applied to the first electrode layer and the second electrode layer, an arc electric field is formed in the area of the liquid crystal layer close to the array substrate, so that liquid crystal molecules can form a plurality of arc patterns.
Optionally, in the display panel provided in this embodiment of the application, the third electrode layer is a planar electrode disposed in an entire layer.
Optionally, in the display panel provided in this embodiment of the present disclosure, the material of the first electrode layer, the second electrode layer, and the third electrode layer may include Indium Tin Oxide (ITO), for example.
Optionally, in the display panel shown in fig. 2 provided in the embodiment of the present application, the sub-pixel unit further includes: a second light shielding layer 3 disposed on the substrate 1 of the array substrate and below the first electrode layer 4 and the second electrode layer 5; the second light shielding layer 3 has a hollow pattern constituting the light incident region 2. The wide area of the sub-pixel unit can be limited by arranging the second shading layer, and the size matching of the light incoming area of the sub-pixel unit and the light converging structure can be controlled. The materials of the first shading layer and the second shading layer can be the same as the black matrix material of the color film substrate, and certainly, other shading materials can be adopted for the first shading layer and the second shading layer.
Optionally, in the display panel provided in the embodiment of the present application, the light converging structure is a converging lens, and a distance between the first light shielding layer and the converging lens is equal to a focal length of the converging lens. Namely, the first shading layer is positioned at the focal plane of the convergent lens.
Optionally, as shown in fig. 2 to 5, in the display panel provided in this embodiment of the application, the third electrode layer 8 is disposed between the light converging structure 7 and the first light shielding layer 10. It is also possible to make the distance between the first light shielding layer 10 and the light converging structure 7 equal to the focal length of the light converging structure 7 by providing a second insulating layer 9 between the third electrode layer 8 and the first light shielding layer 10.
It should be noted that the first light shielding layer is used for preventing light focused by the convergent lens from being emitted from the color film substrate, that is, the first light shielding layer completely shields the light convergent region of the convergent lens, and when the light emitted by the convergent lens is measured within the focal length range of the convergent lens, the farther the distance between a plane parallel to the substrate and the convergent lens is, the smaller the area of the light convergent region on the plane is, the smallest the area of the light convergent region on the focal plane of the convergent lens is, and correspondingly, when the first light shielding layer is located on the focal plane of the convergent lens, the smallest area of the first light shielding layer is, so that the first light shielding layer can be prevented from being visible as much as possible, and the display effect of the display panel. In addition, the ideal result of the collimated light converged by the converging lens is to converge to one point of a focal plane, but the collimated light generally has a divergent angle of 1-10 degrees, so that the light is focused by the lens to form a small-area light spot on the focal plane, and when the first shading layer is located on the focal plane of the converging lens, the area of the first shading layer can completely shade the light spot formed by the collimated light converged by the converging lens.
Alternatively, taking the display panel provided in this embodiment as shown in fig. 2 as an example, an orthogonal projection of the aperture region H of the converging lens on the substrate coincides with an orthogonal projection of the light incident region 2 on the substrate. The condensing lens may be, for example, a plano-convex resin lens having a convex surface facing the liquid crystal layer. Under the condition that the orthographic projection of the convergent lens on the substrate is required to cover the orthographic projection of the light incident region on the substrate, the orthographic projection of the aperture region of the convergent lens on the substrate is superposed with the orthographic projection of the light transmission region on the substrate, the area of the light transmission region of the sub-pixel unit can be maximized under the condition that the aperture of the convergent lens is determined, and the display effect of the display panel is ensured. The aperture of the converging lens may be, for example, greater than 10 microns.
Optionally, as shown in fig. 7, the first light-shielding layer 10 is on the same layer as the color film 15 in the color film substrate. Optionally, in the display panel provided in this embodiment of the present application, a thickness of the liquid crystal layer is greater than 10 micrometers. Therefore, the first electrode layer, the second electrode layer and the third electrode layer can be provided with voltage in a bright state, the area of the liquid crystal layer close to the array substrate is driven to form a plurality of arch patterns, liquid crystal molecules in the rest area close to the color film substrate are not driven, and the long axes of the liquid crystal molecules are parallel to the substrate. When the thickness of the liquid crystal layer is 10 micrometers, the thickness of the liquid crystal layer driven to form a plurality of dome-shaped patterns may be 5 micrometers.
Optionally, in the display panel provided in this embodiment of the present application, the array substrate further includes a first thin film transistor connected to the first electrode layer and a second thin film transistor connected to the second electrode layer. Thus, the first electrode layer and the second electrode layer can be supplied with voltage signals through the first thin film transistor and the second thin film transistor, respectively.
Based on the same inventive concept, an embodiment of the present application further provides a method for driving a display panel, as shown in fig. 8, the method includes:
s101, determining the display brightness currently required by each sub-pixel unit of the display panel;
and S102, providing voltage signals for the first electrode layer, the second electrode layer and the third electrode layer in each sub-pixel unit according to the relationship among the brightness of the sub-pixel unit, the voltage of the first electrode layer, the voltage of the second electrode layer and the voltage of the third electrode layer, which is determined in advance, so that each sub-pixel unit emits light with required display brightness.
Next, taking the display panel shown in fig. 3 and 4 provided in the embodiment of the present application as an example, the display panel driving method provided in the embodiment of the present application is described to realize different luminances. And according to the relationship among the preset brightness of the sub-pixel unit, the voltage of the first electrode layer, the voltage of the second electrode layer and the voltage of the third electrode layer, providing a first voltage signal for the first electrode layer, a second voltage signal for the second electrode layer and a third voltage signal for the third electrode layer.
Specifically, in the dark state, the first voltage signal and the second voltage signal are both V1, and the third voltage signal is V0< V1, so that the electric field direction between the second electrode layer and the third electrode layer is perpendicular to the substrate, as shown in fig. 3, the liquid crystal molecules 13 are vertically arranged under the action of the electric field, that is, the long axis of the liquid crystal molecules 13 is parallel to the electric field direction, the collimated backlight source enters the display panel through the light entering region 2, at this time, the refractive index of the liquid crystal molecules 13 relative to incident natural light is no, so that the light converging structure 7 and the liquid crystal layer 3 have a refractive index difference, and both polarization states of the incident natural light are focused to the first light shielding layer 10 by the light converging structure 7, and thus the dark state with a gray scale of 0, that is an L0 state, can be realized.
In the bright state, for example, the 255 gray scale (L255 state), the applied first voltage signal is V0, the second voltage signal is V2, and the third voltage signal is V0, wherein V0< V2< V1, wherein V2 is smaller, as shown in fig. 4, such that the driving capability of the second electrode layer 5 for the liquid crystal molecules 13 located in the region 17 is weaker, and thus the liquid crystal molecules 13 in the region 17 are not driven, the arrangement of the liquid crystal molecules 13 is the same as the initial orientation, and an arc electric field is formed on the second electrode layer 5, the liquid crystal molecules 13 in the region 18 form a plurality of arc patterns, which are equivalent to a grating structure, and when collimated natural light enters from the light transmitting region, wherein the light in the polarization state corresponding to the dotted line in the figure is not modulated by the liquid crystal, and the refractive index of the liquid crystal molecules is no, the portion of the light is focused by the light converging structure to the first light shielding layer 10, and the light in the polarization state corresponding to the solid line is equivalently, the long axes of the liquid crystal molecules in the region 17 are parallel to the substrate, the refractive index of the liquid crystal molecules in the region is the same as that of the light converging structure, the light converging structure 7 does not act on the light in the polarization state corresponding to the solid line, and the light which is not absorbed by the first shading layer 10 after the light rays are deflected is emitted through the region outside the first shading layer 10. For example, when the first light-shielding layer is the same layer as the color filter, the light having the polarization state corresponding to the solid line and not absorbed by the first light-shielding layer 10 exits through the color filter.
In the L255 state, the second voltage signal (V2-V0)/2 may be applied to the second electrode layer, the second voltage signal- (V2-V0)/2 may be applied to the first electrode layer, and the third voltage signal V0 may be applied to the third electrode layer, where, in the L255 state, the difference between the third voltage signal and the second voltage signal is smaller, which is more favorable for keeping the upper layer liquid crystal molecules undriven and the lower layer liquid crystal molecules receiving the same driving voltage.
It should be noted that, taking fig. 4 as an example, light in the polarization state corresponding to the solid line is modulated by the equivalent grating to be deflected, and the greater the deflection degree of the light, the less the light absorbed by the first light shielding layer, so that the brightness of the emitted light can be adjusted by adjusting the deflection degree of the light, thereby realizing bright states of different gray scales. The first voltage signal and the second voltage signal can be adjusted to adjust the height of the arch of the region 17, so as to adjust the deflection degree of the light passing through the equivalent grating, thereby determining the relationship between the brightness of the sub-pixel unit and the voltage of the first electrode layer, the voltage of the second electrode layer and the voltage of the third electrode layer.
The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application. The display device provided by the embodiment of the application can be a mobile phone, a computer, a television and the like.
In summary, in the display panel, the driving method thereof and the display device provided in the embodiment of the present application, the structure formed by the first electrode layer, the second electrode layer, the light converging structure, the third electrode layer and the liquid crystal layer can replace a polarizer to realize modulation of polarized light. Specifically, in a dark state, the long axes of the liquid crystal molecules are perpendicular to the substrate, the liquid crystal molecules are arranged in a manner of being vertical to the substrate under the action of an electric field, the refractive index of the liquid crystal molecules relative to incident natural light is no, the refractive index difference exists between the light converging structure and the liquid crystal layer, and after the collimated backlight source is incident, two polarization states of the natural light are focused to the first light shielding layer by the light converging structure; in a bright state, a plurality of arch patterns are formed in the area of the liquid crystal layer close to the array substrate, the liquid crystal molecules forming the arch patterns have different optical path differences at different positions in the direction vertical to the substrate, so that the liquid crystal molecules forming the arch patterns can be equivalent to a grating structure, after collimated natural light enters, one polarization state can be modulated by the grating structure, the long axes of the liquid crystal molecules in the rest area close to the color film substrate are parallel to the substrate, the refractive index of the liquid crystal molecules in the area is the same as that of the light converging structure, the light converging structure does not act on the light in the polarization state, the light in the polarization state is modulated and deflected by the grating structure, the light which is not absorbed by the first light shielding layer exits through the area outside the first light shielding layer, and the deflection degree of the polarization state can be controlled by controlling the height of the arch of the equivalent grating, the light absorption amount of the first light shielding layer is controlled, the light emitting brightness of the region outside the first light shielding layer is further controlled, and the other polarization state is not modulated by the grating structure and is focused to the first light shielding layer by the light converging structure; therefore, the display panel can realize the modulation of polarized light under the condition of not using a polarizing film, the manufacturing cost of the display panel can be reduced, the transmittance of the display panel can be improved, the display effect of the display panel is improved, and the user experience is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display panel, comprising: the liquid crystal display panel comprises an array substrate, a color film substrate and a liquid crystal layer positioned between the array substrate and the color film substrate, and is characterized in that the display panel is divided into an array of sub-pixel units, and each sub-pixel unit comprises:
the first electrode layer and the second electrode layer are arranged on the substrate of the array substrate and are insulated from each other; the second electrode layer comprises second strip-shaped sub-electrodes which are arranged periodically; intervals exist among the second strip-shaped sub-electrodes, and the orthographic projection of the first electrode layer on the substrate covers the orthographic projection of the intervals on the substrate;
the light converging structure, the third electrode layer and the first light shielding layer are arranged on one side, close to the liquid crystal layer, of the color film substrate, the orthographic projection of the light converging structure on the substrate covers the orthographic projection of the light incoming area of the sub-pixel unit on the substrate, the first light shielding layer is positioned on one side, far away from the liquid crystal layer, of the light converging structure, and the geometric center of the orthographic projection of the first light shielding layer on the substrate is superposed with the geometric center of the orthographic projection of the light converging structure on the substrate;
in the sub-pixel units, the long axes of liquid crystal molecules in the liquid crystal layer are parallel to the substrate in an initial state, the long axes of the liquid crystal molecules are perpendicular to the substrate in a dark state, a plurality of arch patterns are formed in the area, close to the array substrate, of the liquid crystal layer in a bright state, and the long axes of the liquid crystal molecules in the other areas, close to the color film substrate, are parallel to the substrate; in a bright state, the refractive index of the liquid crystal molecules in the long axis direction is equal to that of the light converging structure, and the refractive index of the liquid crystal molecules in the short axis direction is smaller than that of the light converging structure.
2. The display panel according to claim 1, wherein the first electrode layer and the second electrode layer are different layers;
the first electrode layer comprises first strip-shaped sub-electrodes which are arranged periodically, and the first strip-shaped sub-electrodes and the second strip-shaped sub-electrodes are arranged alternately.
3. The display panel according to claim 1, wherein the first electrode layer is located between the second electrode layer and the substrate;
the first electrode layer includes a planar electrode provided over the entire surface.
4. The display panel of claim 1, wherein the sub-pixel unit further comprises: a second light shielding layer arranged on the substrate of the array substrate and positioned below the first electrode layer and the second electrode layer; the second light shielding layer is provided with a hollow pattern forming the light incoming area.
5. The display panel of claim 1, wherein the light converging structure is a converging lens; the distance between the first shading layer and the converging lens is equal to the focal length of the converging lens.
6. The display panel according to claim 1, wherein the third electrode layer is provided between the light converging structure and the first light shielding layer.
7. The display panel of claim 1, wherein the liquid crystal layer has a thickness greater than 10 microns.
8. The display panel of claim 1, wherein the sub-pixel unit further comprises: the first thin film transistor is connected with the first electrode layer, and the second thin film transistor is connected with the second electrode layer.
9. A driving method of a display panel according to any one of claims 1 to 8, comprising:
determining the display brightness currently required by each sub-pixel unit of the display panel;
and providing voltage signals for the first electrode layer, the second electrode layer and the third electrode layer in each sub-pixel unit according to the relationship among the predetermined brightness of the sub-pixel unit, the voltage of the first electrode layer, the voltage of the second electrode layer and the voltage of the third electrode layer, so that each sub-pixel unit emits light with required display brightness.
10. A display device comprising the display panel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258833.6A CN108490702B (en) | 2018-03-27 | 2018-03-27 | Display panel, driving method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258833.6A CN108490702B (en) | 2018-03-27 | 2018-03-27 | Display panel, driving method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108490702A CN108490702A (en) | 2018-09-04 |
| CN108490702B true CN108490702B (en) | 2021-01-22 |
Family
ID=63337692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810258833.6A Expired - Fee Related CN108490702B (en) | 2018-03-27 | 2018-03-27 | Display panel, driving method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108490702B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110955078B (en) * | 2018-09-27 | 2024-04-09 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| CN109143635A (en) * | 2018-10-25 | 2019-01-04 | 京东方科技集团股份有限公司 | Display device and display methods |
| CN110045539A (en) * | 2019-04-23 | 2019-07-23 | 京东方科技集团股份有限公司 | The manufacturing method and display device of display panel, display panel |
| CN110398864B (en) * | 2019-07-31 | 2021-10-26 | 京东方科技集团股份有限公司 | Display device and driving method thereof |
| CN114326354B (en) * | 2022-01-13 | 2024-01-16 | 京东方科技集团股份有限公司 | Display panel, display device and display method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968595A (en) * | 2010-10-13 | 2011-02-09 | 深圳市华星光电技术有限公司 | 2D and 3D switching liquid crystal lens assembly and display device |
| CN104280931A (en) * | 2014-10-17 | 2015-01-14 | 友达光电股份有限公司 | Color filter substrate capable of improving large-viewing-angle light leak and manufacturing method of color filter substrate |
| CN106526993A (en) * | 2017-01-13 | 2017-03-22 | 京东方科技集团股份有限公司 | Liquid crystal display and driving method thereof |
| CN107632451A (en) * | 2017-10-26 | 2018-01-26 | 京东方科技集团股份有限公司 | A kind of display panel, display device and display methods |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI412791B (en) * | 2010-03-26 | 2013-10-21 | Silicon Touch Tech Inc | Double-layer liquid crystal lens apparatus |
| US9696583B2 (en) * | 2013-12-27 | 2017-07-04 | Lg Display Co., Ltd. | Switchable type display device and method of driving the same |
-
2018
- 2018-03-27 CN CN201810258833.6A patent/CN108490702B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968595A (en) * | 2010-10-13 | 2011-02-09 | 深圳市华星光电技术有限公司 | 2D and 3D switching liquid crystal lens assembly and display device |
| CN104280931A (en) * | 2014-10-17 | 2015-01-14 | 友达光电股份有限公司 | Color filter substrate capable of improving large-viewing-angle light leak and manufacturing method of color filter substrate |
| CN106526993A (en) * | 2017-01-13 | 2017-03-22 | 京东方科技集团股份有限公司 | Liquid crystal display and driving method thereof |
| CN107632451A (en) * | 2017-10-26 | 2018-01-26 | 京东方科技集团股份有限公司 | A kind of display panel, display device and display methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108490702A (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108490702B (en) | Display panel, driving method thereof and display device | |
| EP2535746B1 (en) | Liquid crystal lens and display including the same | |
| KR101216768B1 (en) | Stereoscopic image display device | |
| US20190094575A1 (en) | Display panel and display device | |
| US20150277151A1 (en) | Lenses with electrically-tunable power and alignment | |
| CN110888270B (en) | Display panel and display device | |
| US10831054B2 (en) | Display panel and display apparatus | |
| CN109061932B (en) | Transparent display panel and transparent display device | |
| CN108845460B (en) | Backlight module and display device | |
| CN110398864B (en) | Display device and driving method thereof | |
| US20210325727A1 (en) | Liquid crystal glasses and liquid crystal display panel with light leakage elimination element | |
| CN111142300A (en) | Display device, manufacturing method of display device and control method | |
| US10678088B2 (en) | Display apparatus comprising a lens assembly having first and second lens layers located between a polarization converting unit and a third lens layer and displaying method | |
| CN105511180A (en) | Liquid crystal panel and display device and method | |
| CN215813616U (en) | Display device with switchable viewing angle | |
| US10216060B2 (en) | Liquid crystal lens and manufacturing method thereof, display device | |
| EP3859441B1 (en) | Display panel, method for driving same, and display device | |
| US11204527B2 (en) | Liquid crystal display panel, driving method therefor, and display device | |
| CN112034648A (en) | Display device | |
| KR100685573B1 (en) | Liquid crystal display and electronic device | |
| US20090153651A1 (en) | Suspended particle device | |
| CN115016156A (en) | Display device with switchable wide and narrow viewing angles and driving method | |
| US20060087607A1 (en) | Multi-domain vertical alignment liquid crystal display device | |
| CN111427187B (en) | Display panel with switchable viewing angles and display device | |
| CN114815411B (en) | Display panel and mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210122 |