CN110673412B - Display panel and display device - Google Patents
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- CN110673412B CN110673412B CN201910988477.8A CN201910988477A CN110673412B CN 110673412 B CN110673412 B CN 110673412B CN 201910988477 A CN201910988477 A CN 201910988477A CN 110673412 B CN110673412 B CN 110673412B
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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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
Abstract
The embodiment of the invention provides a display panel and a display device. The display panel comprises a first substrate, a second substrate, a third substrate, a first liquid crystal layer arranged between the first substrate and the second substrate, and a second liquid crystal layer arranged between the second substrate and the third substrate; the first substrate, the first liquid crystal layer and the second substrate form a brightness control screen for controlling brightness, the second substrate, the second liquid crystal layer and the third substrate form an image display screen for displaying images, the brightness control screen comprises a plurality of light control pixels, the image display screen comprises a plurality of display pixels, and pixel domains of the display pixels are symmetrical to pixel domains of the light control pixels. According to the invention, the pixel domains of the display pixels of the image display screen and the light control pixels of the brightness control screen are set to be symmetrical, so that the large-viewing-angle contrast is increased, Moire is eliminated, and the display quality of the display panel is improved to the maximum extent.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Liquid Crystal Display (LCD) has the advantages of good picture quality, small volume, light weight, low driving voltage, low power consumption, no radiation, relatively low manufacturing cost and the like, and is widely applied to electronic products such as tablet computers, televisions, mobile phones, vehicle-mounted displays and the like. With the development of display technology, in order to reduce power consumption and improve contrast of a display screen, a Local Dimming (Local Dimming) technology is introduced into liquid crystal display. The local backlight adjusting technology is used for adjusting the brightness of each area of backlight according to an image, improving the brightness of a high-brightness part in the image, reducing the brightness of a dark part in the image and achieving the optimal contrast. The method for implementing local backlight adjustment in the vehicle-mounted display includes direct type backlight, Mini Light Emitting Diode (Mini LED) backlight, Organic Light Emitting Diode (OLED) display, and dual liquid crystal cell (BD cell) display. Researches show that the double-layer liquid crystal box display scheme has the characteristics of natural transition of image pictures and the like, and is very suitable for vehicle-mounted display with high reliability requirements.
The structure of the existing double-layer liquid crystal box comprises a first liquid crystal box and a second liquid crystal box which are overlapped, wherein the first liquid crystal box comprises two first base plates which are oppositely arranged and a first liquid crystal layer which is arranged between the two first base plates, the second liquid crystal box comprises two second base plates which are oppositely arranged and a second liquid crystal layer which is arranged between the two second base plates, a first polaroid is arranged on the surface of one side, far away from the second liquid crystal box, of the first liquid crystal box, a second polaroid is arranged between the first liquid crystal box and the second liquid crystal box, and a third polaroid is arranged on the surface of one side, far away from the first liquid crystal box, of the second liquid crystal box. Practical use shows that the existing double-layer liquid crystal box has the defects of low display quality and the like.
Disclosure of Invention
The present invention provides a display panel and a display device to overcome the defects of low display quality of the existing double-layer liquid crystal cell.
In order to solve the above technical problem, an embodiment of the present invention provides a display panel, including a first substrate, a second substrate, a third substrate, a first liquid crystal layer disposed between the first substrate and the second substrate, and a second liquid crystal layer disposed between the second substrate and the third substrate; the first substrate, the first liquid crystal layer and the second substrate form a brightness control screen for controlling brightness, the brightness control screen comprises a plurality of light control pixels, the second substrate, the second liquid crystal layer and the third substrate form an image display screen for displaying images, the image display screen comprises a plurality of display pixels, and pixel domains of the display pixels are symmetrical to pixel domains of the light control pixels.
Optionally, the first substrate includes a first base and a first array structure layer disposed on a surface of the first base facing the second substrate; the second substrate comprises a second base, a polarization structure layer arranged on the surface of one side, facing the first substrate, of the second base and a second array structure layer arranged on the surface of one side, facing the third substrate, of the second base; the third substrate comprises a third substrate and a color film structure layer arranged on the surface of one side, facing the second substrate, of the third substrate.
Optionally, the first array structure layer includes a plurality of light-controlling pixels arranged in a matrix defined by a plurality of first gate lines and a plurality of first data lines crossing vertically, and a plurality of first strip electrodes are disposed in the light-controlling pixels; the second array structure layer comprises a plurality of display pixels which are defined by a plurality of second grid lines and a plurality of second data lines in a crossed mode and are arranged in a matrix mode, and the display pixels comprise a plurality of second strip-shaped electrodes; the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a vertical axis, or the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a horizontal axis.
Optionally, the first strip-shaped electrode and the second strip-shaped electrode include a straight line shape or a zigzag shape.
Optionally, the polarization structure layer includes a high-resistance layer, a protective layer, and a polarization layer stacked on a surface of the second substrate facing the first substrate.
Optionally, the high resistance layer has a sheet resistance of 108～1010Ohm per square.
Optionally, the color film structure layer includes a transparent conductive layer disposed on the first substrate, and a black matrix and a color photoresist disposed on the transparent conductive layer.
Optionally, the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to +5 degrees, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to-5 degrees; or the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to minus 5 degrees, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to plus 5 degrees.
Optionally, the first liquid crystal layer is a positive liquid crystal, and the second liquid crystal layer is a negative liquid crystal; or the first liquid crystal layer is negative liquid crystal, and the second liquid crystal layer is positive liquid crystal.
Optionally, a ratio of the resolution of the image display screen to the resolution of the brightness control screen is a positive integer greater than or equal to 1.
Optionally, the display mode of the display panel includes an advanced super-dimensional field switching display mode, a planar switching display mode, or a fringe field switching display mode.
The embodiment of the invention also provides a display device which comprises the display panel.
The embodiment of the invention provides a display panel and a display device, wherein an image display screen and a brightness control screen which are overlapped are formed by three substrates, pixel domains of display pixels of the image display screen and light control pixels of the brightness control screen are symmetrical, the contrast ratio of a large visual angle is increased through optical compensation of a pixel symmetrical structure, Moire fringes are eliminated, the display quality of the display panel is improved to the maximum extent, and the defects of low display quality and the like of the conventional double-layer liquid crystal box are effectively overcome.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the embodiments of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and are not intended to limit the invention. The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention;
FIG. 2 is a schematic plan view of a brightness control panel according to a first embodiment of the present invention;
FIG. 3 is a schematic plan view of an image display screen according to a first embodiment of the present invention;
FIG. 4 is a schematic view illustrating a first substrate according to a first embodiment of the present invention;
FIG. 5 is a schematic view illustrating a third substrate according to the first embodiment of the present invention;
FIGS. 6 and 7 are schematic views illustrating a second substrate according to the first embodiment of the present invention;
FIG. 8 is a schematic view of the deflection of the liquid crystal in the brightness control panel according to the first embodiment of the present invention;
FIG. 9 is a schematic view of the liquid crystal deflection of the image display panel according to the first embodiment of the present invention;
FIG. 10 is a schematic plan view of a brightness control panel according to a second embodiment of the present invention;
FIG. 11 is a schematic plan view of an image display panel according to a second embodiment of the present invention.
Description of reference numerals:
10 — a first substrate; 11 — a first thin film transistor; 12 — a first common electrode;
13 — a first pixel electrode; 14 — a first alignment layer; 20 — a second substrate;
21-a second thin film transistor; 22 — a second common electrode; 23 — a second pixel electrode;
24-a second alignment layer; 30 — a third substrate; 31-black matrix;
32-color photoresist; 34 — a third alignment layer; 41-high resistance layer;
42-a protective layer; 43-a polarizing layer; 44-a fourth alignment layer;
45-shielding layer; 100 — a first substrate; 200-a second substrate;
300 — a third substrate; 400-first liquid crystal layer; 500-a second liquid crystal layer;
101 — a first gate line; 102 — a first data line; 201-a second gate line;
202 — second data line.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The inventor of the application finds that the existing double-layer liquid crystal box has the defects of low display quality and the like, and the defects are caused by low pixel alignment precision of the first liquid crystal box and the second liquid crystal box. Specifically, the conventional double-layer liquid crystal cell is composed of four substrates and three polarizers, so that the preparation process requires more and complicated alignment and attachment processes. For example, two first substrates are needed for aligning when preparing the first liquid crystal cell, two second substrates are needed for aligning when preparing the second liquid crystal cell, two liquid crystal cells are needed for aligning when forming the double-layer liquid crystal cell, and a multiple polarizer attaching process is also included in the process. Due to the large deviation of the alignment and bonding processes and the preparation process, it is difficult to ensure the accurate alignment of the pixels of the first liquid crystal cell and the pixels of the second liquid crystal cell. When the pixel alignment precision of the first liquid crystal box and the second liquid crystal box is low, the large visual angle contrast ratio is reduced, the moire fringes are easy to generate, and the display quality of the conventional double-layer liquid crystal box is low.
In order to overcome the defects of low display quality and the like of the conventional double-layer liquid crystal box, the embodiment of the invention provides a display panel. The main body structure of the display panel comprises a first substrate, a second substrate, a third substrate, a first liquid crystal layer arranged between the first substrate and the second substrate, and a second liquid crystal layer arranged between the second substrate and the third substrate; the first substrate, the first liquid crystal layer and the second substrate form a brightness control screen for controlling brightness, the brightness control screen comprises a plurality of light control pixels, the second substrate, the second liquid crystal layer and the third substrate form an image display screen for displaying images, the image display screen comprises a plurality of display pixels, and pixel domains of the display pixels are symmetrical to pixel domains of the light control pixels.
In one embodiment, the first substrate comprises a first base and a first array structure layer arranged on the surface of one side, facing the second substrate, of the first base; the second substrate comprises a second base, a polarization structure layer arranged on the surface of one side, facing the first substrate, of the second base and a second array structure layer arranged on the surface of one side, facing the third substrate, of the second base; the third substrate comprises a third substrate and a color film structure layer arranged on the surface of one side, facing the second substrate, of the third substrate.
The first array structure layer comprises a plurality of light control pixels which are vertically crossed by a plurality of first grid lines and a plurality of first data lines to define a matrix arrangement, and a plurality of first strip electrodes are arranged in the light control pixels; the second array structure layer comprises a plurality of display pixels which are defined by a plurality of second grid lines and a plurality of second data lines in a crossed mode and are arranged in a matrix mode, and the display pixels comprise a plurality of second strip-shaped electrodes; the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a vertical axis, or the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a horizontal axis.
In another embodiment, the first liquid crystal layer is a positive liquid crystal and the second liquid crystal layer is a negative liquid crystal; or the first liquid crystal layer is negative liquid crystal, and the second liquid crystal layer is positive liquid crystal.
In yet another embodiment, the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to +5 °, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to-5 °; or the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to minus 5 degrees, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to plus 5 degrees.
The embodiment of the invention provides a display panel, which comprises an image display screen and a brightness control screen which are stacked by three substrates, wherein pixel domains of display pixels of the image display screen and light control pixels of the brightness control screen are in mirror symmetry, and the large-viewing-angle contrast ratio is increased through optical compensation of a pixel symmetrical structure, Moire patterns are eliminated, the display quality of the display panel is improved to the maximum extent, and the defects of low display quality and the like of the conventional double-layer liquid crystal box are effectively overcome.
The technical solution of the embodiment of the present invention is explained in detail by the specific embodiment below.
First embodiment
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the invention. As shown in fig. 1, the main structure of the display panel of the present embodiment includes a first substrate 100, a second substrate 200, a third substrate 300, a first liquid crystal layer 400 disposed between the first substrate 100 and the second substrate 200, and a second liquid crystal layer 500 disposed between the second substrate 200 and the third substrate 300. The first substrate 100, the first liquid crystal layer 400, and the second substrate 200 form a brightness control panel for brightness control, the second substrate 200, the second liquid crystal layer 500, and the third substrate 300 form an image display panel for image display, and the stacked image display panel and brightness control panel form a display panel of the present embodiment.
The first substrate 100 is an array substrate, and includes a first substrate 10 and a first array structure layer disposed on a surface of the first substrate 10 facing the second substrate 200, where the first array structure layer includes a first thin film transistor 11, a first common electrode 12, and a first pixel electrode 13. The second substrate 200 is an integrated substrate, and includes a second substrate 20, a second array structure layer disposed on a surface (first surface) of the second substrate 20 facing the third substrate 300, and a polarization structure layer disposed on a surface (second surface) of the second substrate 20 facing the first substrate 100. The second array structure layer includes a second thin film transistor 21, a second common electrode 22, and a second pixel electrode 23, and the polarization structure layer includes a high resistance layer 41, a protective layer 42, and a polarization layer 43 sequentially stacked on the second surface of the second substrate 20. The third substrate 300 is a color film substrate, including: the third substrate 30 and a color filter structure layer disposed on a surface of the third substrate 30 facing the second substrate 200, where the color filter structure layer includes a black matrix 31 and a color photoresist 32.
As shown in fig. 1, the first array structure layer of the first substrate 100 and the polarization structure layer of the second substrate 200 are disposed opposite to each other, a first alignment layer is further disposed on a surface of the first array structure layer facing the second substrate 200, a fourth alignment layer is further disposed on a surface of the polarization structure layer facing the first substrate 100, the first liquid crystal layer 400 is disposed between the first alignment layer and the fourth alignment layer, and the first substrate 100, the second surface of the second substrate 200, and the first liquid crystal layer 400 constitute a brightness control panel for brightness control. The second array structure layer of the second substrate 200 is arranged opposite to the color film structure layer of the third substrate 300, the surface of the second array structure layer facing the third substrate 300 is further provided with a second orientation layer, the surface of the color film structure layer facing the second substrate 200 is further provided with a third orientation layer, the second liquid crystal layer 500 is arranged between the second orientation layer and the third orientation layer, and the third substrate 300, the first surface of the second substrate 200 and the second liquid crystal layer 500 form an image display screen for displaying images.
Fig. 2 is a schematic plan view of a brightness control panel according to a first embodiment of the present invention. As shown in fig. 2, the first array structure layer on the first substrate 100 includes a plurality of first gate lines 101 and a plurality of first data lines 102, the plurality of first gate lines 101 and the plurality of first data lines 102 vertically cross to define a plurality of light-controlling pixels arranged in a matrix, a first Thin Film Transistor (TFT) 11, a first common electrode 12, and a first pixel electrode 13 are disposed in each light-controlling pixel, a gate electrode of the first Thin Film Transistor 11 is connected to the first gate line, a source electrode of the first Thin Film Transistor 11 is connected to the first data line, and a drain electrode of the first Thin Film Transistor 11 is connected to the first pixel electrode 13. In this embodiment, the first common electrode 12 is a planar electrode, and the first pixel electrode 13 is a slit electrode formed of a plurality of first stripe electrodes. The plurality of first stripe electrodes of the first pixel electrode 13 extend along the first direction, so that the light-controlling pixel has a first pixel domain. It is understood that the gate line and the data line perpendicularly cross in this embodiment means that the gate line and the data line perpendicularly cross in projection on the substrate, and the gate line and the data line are not in direct contact due to the presence of the insulating layer.
Fig. 3 is a schematic plan view of an image display screen according to a first embodiment of the invention. As shown in fig. 3, the second array structure layer on the second substrate 200 includes a plurality of second gate lines 201 and a plurality of second data lines 202 disposed on the first surface of the second substrate 20, the plurality of second gate lines 201 and the plurality of second data lines 202 intersect to define a plurality of display pixels arranged in a matrix, a second thin film transistor 21, a second common electrode 22, and a second pixel electrode 23 are disposed in each display pixel, a gate electrode of the second thin film transistor 21 is connected to the second gate line, a source electrode of the second thin film transistor 21 is connected to the second data line, and a drain electrode of the second thin film transistor 21 is connected to the second pixel electrode 23. In the present embodiment, the second common electrode 22 is a planar electrode, and the second pixel electrode 23 is a slit electrode formed of a plurality of second stripe electrodes. The plurality of second strip electrodes of the second pixel electrode 23 extend along the second direction, so that the display pixel has a second pixel domain, and the second pixel domain is mirror-symmetric to the first pixel domain.
In this embodiment, the pixel domain mirror symmetry means that the first stripe electrodes and the second stripe electrodes are symmetrical with respect to a vertical axis, that is, a first direction in which the first stripe electrodes extend and a second direction in which the second stripe electrodes extend are symmetrical with respect to the vertical axis, or the first stripe electrodes and the second stripe electrodes are symmetrical with respect to a horizontal axis, that is, the first direction in which the first stripe electrodes extend and the second direction in which the second stripe electrodes extend are symmetrical with respect to the horizontal axis. Specifically, with the first gate line or the second gate line as a horizontal axis, if the plurality of strip electrodes of the first pixel electrode 13 have an angle α with the first gate line, the plurality of strip electrodes of the second pixel electrode 23 have an angle 360 ° - α with the second gate line. With the first data line or the second data line as a vertical axis, if the plurality of strip electrodes of the first pixel electrode 13 have an angle β with the first data line, the plurality of strip electrodes of the second pixel electrode 23 have an angle of 180 ° - β with the second data line.
In practical implementation, the first common electrode may be a stripe electrode and the first pixel electrode may be a planar electrode, or the second common electrode may be a stripe electrode and the second pixel electrode may be a planar electrode.
The technical solution of this embodiment is further described below by the manufacturing process of the display panel of this embodiment. The "patterning process" in this embodiment includes processes of depositing a film, coating a photoresist, exposing a mask, developing, etching, and stripping the photoresist, and is a well-established manufacturing process in the related art. The "photolithography process" referred to in this embodiment includes coating film coating, mask exposure, and development, and is a well-established production process in the related art. The deposition may be performed by a known process such as sputtering, evaporation, chemical vapor deposition, etc., the coating may be performed by a known coating process, and the etching may be performed by a known method, which is not particularly limited herein. In the description of the present embodiment, it is to be understood that "thin film" refers to a layer of a material deposited or coated on a substrate. The "thin film" may also be referred to as a "layer" if it does not require a patterning process or a photolithography process throughout the fabrication process. If a patterning process or a photolithography process is required for the "thin film" in the entire manufacturing process, the "thin film" is referred to as a "thin film" before the patterning process, and the "layer" after the patterning process. The "layer" after the patterning process or the photolithography process includes at least one "pattern".
The whole preparation process of the display panel of the embodiment mainly comprises two major parts: substrate preparation and CELL sealing (CELL), and the substrate preparation respectively comprises first substrate preparation, second substrate preparation and third substrate preparation. The preparation of the three substrates has no precedence requirement and can be carried out simultaneously. In the case of sealing the pair of cases after the three substrates are prepared, the pair of cases of the first substrate and the second substrate may be performed first, or the pair of cases of the second substrate and the third substrate may be performed first. The whole manufacturing process of the display panel will be described below by taking an Advanced Super Dimension Switch (ADS) display mode as an example.
Firstly, one of the substrate preparation: preparing a first substrate
The main structure of the first substrate of this embodiment is substantially the same as that of the array substrate of the related art, and the first substrate may be prepared by a preparation process mature in the art. For example, the first substrate may be prepared by the following process. Firstly, forming a grid line, a grid electrode and a first common electrode 12 pattern on a first substrate 10, wherein the first common electrode 12 is a plate-shaped electrode; subsequently, a first insulating layer covering the gate line, the gate electrode, and the first common electrode 12 pattern is formed, and an active layer pattern is formed on the first insulating layer; then forming a data line, a source electrode and a drain electrode pattern, and forming a conductive channel between the source electrode and the drain electrode; then forming a second insulating layer covering the data line, the source electrode and the drain electrode, forming a first pixel electrode 13 pattern on the second insulating layer, wherein the first pixel electrode 13 is connected with the drain electrode through a via hole formed in the second insulating layer, the first pixel electrode 13 is a slit electrode formed by a plurality of first strip-shaped electrodes, and the plurality of first strip-shaped electrodes extend along a first direction, so that the light control pixel has a first pixel domain; subsequently, a planarization layer (OC) covering the pixel electrode is formed, an alignment film is coated on the planarization layer, and the alignment film is subjected to an alignment process to form a first alignment layer 14, as shown in fig. 4. Wherein the gate electrode, the active layer, the source electrode and the drain electrode constitute a first thin film transistor 11, and the structural layers above the first substrate 10 and below the first alignment layer 14 constitute a first array structural layer. In this embodiment, the plurality of strip-shaped electrodes of the pixel electrode 13 are linear, and the light-controlling pixel has a single-domain pixel structure.
Secondly, preparing a substrate: preparing a third substrate
The main structure of the third substrate in this embodiment is substantially the same as that of a color filter substrate in the related art, and a mature preparation process in the field may be adopted for preparing the third substrate. For example, the third substrate may be prepared by the following process. Forming a transparent conductive layer (such as Indium Tin Oxide (ITO)) on the third substrate 30, forming a black matrix 31 pattern on the transparent conductive layer, wherein a plurality of black matrices 31 are arranged at intervals; then, color light resistances 32 are respectively formed among the black matrixes 31 arranged at intervals, and the color light resistances 32 comprise red (R) light resistances, green (G) light resistances and blue (B) light resistances and are arranged according to a set rule; subsequently, a planarization layer covering the black matrix 31 and the color resists 32 is formed, an alignment film is coated on the planarization layer, and the alignment film is subjected to an alignment process to form a third alignment layer 34, as shown in fig. 5. The structure layers above the third substrate 30 and below the third alignment layer 34 form a color filter structure layer. In practical implementation, a spacer Pillar (PS) pattern may be formed on the third substrate.
Third, preparing the substrate: preparing a second substrate
The second substrate of this embodiment is an integrated substrate, and includes a second array structure layer and a second alignment layer disposed on the first surface of the second substrate 20, and a polarization structure layer and a fourth alignment layer disposed on the second surface of the second substrate 20. In the preparation of the second substrate, the corresponding structural layer can be prepared on the first surface, and then the second substrate is turned over and prepared on the second surface; or the corresponding structure layer may be prepared on the second surface first, and then the second substrate is turned over and prepared on the first surface, which is not limited herein. The first surface is prepared first, and the second surface is prepared later.
First, a second array structure layer including the first thin film transistor 21, the second common electrode 22, and the second pixel electrode 23 and a second alignment layer 24 are formed on the first surface of the second substrate 20 in substantially the same manner and process as described above for the first substrate, as shown in fig. 6. In contrast, the plurality of second stripe electrodes of the second pixel electrode 23 are mirror-symmetrical to the plurality of first stripe electrodes of the first pixel electrode 13, so that the display pixel has a second pixel domain.
Subsequently, the second substrate 20 on which the second array structure layer and the second alignment layer are formed is turned over such that the second surface faces upward, and a polarization structure layer and a fourth alignment layer are prepared on the second surface. The method specifically comprises the following steps: first, a high-resistance layer 41 and a protective layer 42 are sequentially formed on the second surface of the second substrate 20, a polarizing layer 43 is formed on the protective layer 42, then the protective layer 42, a blocking layer 45, and a planarizing layer are sequentially formed on the polarizing layer 43, and finally an alignment film is formed on the planarizing layer 46, and the alignment film is subjected to an alignment treatment to form a fourth alignment layer 44, as shown in fig. 7. The high resistance layer 41 is used to form a shielding structure between the first array structure layer and the second array structure layer to eliminate signal interference between the two array structures, and the sheet resistance of the high resistance layer 41 is 108～1010Omega/□. The sheet resistance, also called sheet resistance, is defined as the resistance of a square semiconductor sheet in the direction of current flow in ohms per square (Ω/□). The two protective layers 42 are disposed on the upper and lower sides of the polarizing layer 43, and are used for protecting the polarizing layer 43 and preventing the polarizing layer 43 from being affected by water vapor and the like to fail. The shielding layer 45 functions as the black matrix 31 on the third substrate 30, and is disposed at a position corresponding to the position of the black matrix 31 on the third substrate 30. In practical implementation, a spacer Pillar (PS) pattern may also be formed on the second surface of the second substrate. The processes of forming the high resistance layer, the protective layer, the shielding layer, the planarization layer, the alignment film, the spacer pillar, etc. are well known to those skilled in the art and will not be described herein.
The polarization layer is of a grating polarization structure and comprises a plurality of grating strips which are arranged in parallel and are arranged periodically, and the polarization function is realized when the polarization layer is displayed. The basic principle of the grating polarization structure is that a group of grating strips with the spacing close to or smaller than the incident wavelength are sequentially arranged, so that TE polarized light parallel to the direction of the grating strips is absorbed or reflected, and TM polarized light perpendicular to the direction of the grating strips is transmitted. The material of the polarizing layer may be a metal material or a non-metal material commonly used in the display technology field, and may be prepared by methods including, but not limited to, nanoimprint, 3D printing, patterning process, etc., and the preparation process is well known to those skilled in the art and will not be described herein.
Through the above process, the preparation of three substrates of this example was completed.
Four, to box sealing
Firstly, coating frame sealing glue on the peripheral area of a first substrate, dripping liquid crystal on the display area of the first substrate, aligning a second substrate and the first substrate under a vacuum condition, enabling one surface of the second substrate, on which a polarization structure layer is formed, to face the first substrate, enabling the second substrate and the first substrate to be relatively close to each other for pressing, solidifying and hardening the frame sealing glue through ultraviolet curing and/or thermocuring, and enabling the first substrate, the second substrate and a first liquid crystal layer positioned between the first substrate and the second substrate to form a brightness control screen for controlling brightness. And then coating frame sealing glue on the peripheral area of the surface of one side of the second substrate, on which the second array structure layer is formed, dripping liquid crystal in a display area, aligning a third substrate with the second substrate under a vacuum condition, enabling the surface of the third substrate, on which the color film structure layer is formed, to face the second substrate, enabling the third substrate and the second substrate to be relatively close to each other for pressing, and solidifying and hardening the frame sealing glue through ultraviolet curing and/or thermal curing, wherein the second substrate, the third substrate and a second liquid crystal layer positioned between the second substrate and the third substrate form an image display screen for image display. Thus, the display panel of the present example was completed as shown in fig. 1.
In practical implementation, the frame sealing glue and the liquid crystal may be coated and dropped on the side of the second substrate where the polarizing structure layer is formed, or coated on the third substrate, the order of the cells may be adjusted according to actual needs, and the subsequent processes may further include attaching a polarizer, setting a backlight source, and the like.
In this embodiment, the ratio of the resolution of the image display screen to the resolution of the brightness control screen is a positive integer greater than or equal to 1. For example, if the resolution of the image display panel is X × Y, the resolution of the brightness control panel is (X/n) × (Y/n), n is a positive integer greater than or equal to 1, such as 2, 4 or 8, i.e., the size of the light control pixels of the brightness control panel may be greater than or equal to the size of the display pixels of the image display panel, and the overall transmittance is improved on the basis of realizing the local backlight adjustment. In practical implementation, the backlight source is arranged on the first substrate in the direction away from the second substrate, the brightness control screen is used for generating a control voltage signal of a corresponding partition according to the brightness of each preset partition of an image to be displayed, and then the first array structure layer controls the rotation of liquid crystal molecules in the first liquid crystal layer according to the control voltage signal to modulate incident light from the backlight source. The image display screen is used for generating a driving voltage signal according to the pixel value of an image to be displayed, and then the second array structure layer controls the rotation of liquid crystal molecules in the second liquid crystal layer according to the driving voltage signal to realize image display.
The liquid crystal belongs to anisotropic single-axis crystals and has a birefringence property, and when light of the liquid crystal propagates in a non-liquid crystal main axis direction, the liquid crystal can show anisotropy, so that the effective optical path difference delta nd can be different along with different visual angles under different visual angles. In the case of a single-layer liquid crystal, Δ nd of an L0 (black) picture at a normal front viewing angle can satisfy a full black picture, and the front viewing angle luminance is low. However, as the viewing angle increases, Δ nd changes, so that part of light leaks out from the L0 picture under a large viewing angle, and the L0 picture is brighter under the large viewing angle. Under the condition of a double-layer liquid crystal box, the problem that an L0 picture is slightly bright under a single-layer liquid crystal large visual angle still exists, and the problem that an L0 picture is slightly bright under the large visual angle is further aggravated due to the fact that the pixel alignment precision of the double-layer liquid crystal box is low and the light leakage phenomenon is more serious. In the embodiment, the pixel domains of the display pixel of the image display screen and the light control pixel of the brightness control screen are set to be symmetrical, so that the optical compensation of a large visual angle is realized through a pixel symmetrical structure, and the contrast of the large visual angle is increased. Specifically, in this embodiment, the first pixel electrode of the brightness control panel and the second pixel electrode of the image display panel are both strip electrodes, but the first strip electrode of the first pixel electrode extends along the first direction, the second strip electrode of the second pixel electrode extends along the second direction, and the first direction in which the first strip electrode extends and the second direction in which the second strip electrode extends are symmetric with respect to the gate line (or the data line), so that the two layers of liquid crystals of the image display panel and the brightness control panel are symmetrically deflected.
FIG. 8 is a schematic view of the liquid crystal deflection of the brightness control panel according to the first embodiment of the present invention, and FIG. 9 is a schematic view of the liquid crystal deflection of the image display panel according to the first embodiment of the present invention, wherein the dotted line is the initial alignment direction of the liquid crystal molecules and the arrow is the liquid crystal molecule deflection direction. Since the alignment directions of the respective alignment layers are the same in this embodiment, the liquid crystal molecules of the first liquid crystal layer and the second liquid crystal layer have the same initial alignment angle. As shown in fig. 8 and 9, in the light-controlling pixel of the brightness control panel, under the driving of the horizontal electric field formed by the first strip-shaped electrodes extending along the first direction, the liquid crystal molecules rotate clockwise; in the display pixels of the image display screen, under the drive of a horizontal electric field formed by the second strip-shaped electrodes extending along the second direction, the liquid crystal molecules rotate anticlockwise. Therefore, the rotation directions of the two layers of liquid crystal molecules of the image display screen and the brightness control screen are opposite, and through mutual compensation of the two layers of liquid crystal delta nd, the variation of delta nd caused by visual angle change is reduced, the transmittance of an L0 picture under a large visual angle is reduced, the brightness of an L0 picture under the large visual angle is reduced, and the contrast of the large visual angle is improved. Meanwhile, the rotation directions of the two layers of liquid crystal molecules are opposite, so that the compensation of an oblique viewing angle can be realized, and the effect of a wide viewing angle is achieved.
Meanwhile, the scheme of the embodiment ensures that the display pixels of the image display screen are accurately aligned with the light control pixels of the brightness control screen, and avoids the generation of moire fringes. Specifically, due to the deviation in the manufacturing process and the multiple alignment and bonding processes, the pixel alignment accuracy of the existing double-layer liquid crystal box structure is low, so that the pixel patterns of the two liquid crystal boxes cannot be aligned, and moire fringes are easily generated. Moire is a high frequency irregular streak that causes color to appear in the picture, causing false color anomalies in the final displayed image. The display panel of the embodiment only comprises a first substrate, a second substrate and a third substrate, wherein the image display screen and the brightness control screen share the second substrate, the second array structure layer forming the display pixels on the image display screen and the polarization structure layer forming the light control pixels on the brightness control screen are both arranged on the second substrate, the accurate alignment of the display pixels of the image display screen and the light control pixels of the brightness control screen is ensured to the maximum extent, and the alignment of pixel patterns is ensured, so that the generation of moire fringes can be well avoided.
Therefore, in the embodiment, the pixel domains of the display pixel of the image display screen and the light control pixel of the brightness control screen are set to be symmetrical, and the optical compensation of the pixel symmetrical structure improves the large viewing angle contrast ratio, avoids the generation of moire fringes, improves the display quality of the display panel to the maximum extent, and effectively overcomes the defects of low display quality and the like of the existing double-layer liquid crystal box.
It can be seen through the structure of this embodiment display panel and preparation process thereof, compare with current double-deck liquid crystal box including four base plates and three polaroids, this embodiment passes through a second base plate of image display screen and brightness control screen sharing, and adopt the polarisation layer that sets up on the second base plate to replace the polaroid of current structure, not only reduced counterpoint technology and laminating technology number of times, guaranteed the alignment of pixel pattern, a base plate and a polaroid have been reduced moreover, display panel's whole thickness has been reduced, manufacturing cost has been reduced. Furthermore, the display panel can be prepared by the method of the present embodiment by using the existing process equipment without changing the existing process flow, adding a new process and introducing a new material, and the method has the advantages of good process compatibility, high process realizability, capability of ensuring the yield and good application prospect.
It should be noted that, although the embodiment takes the ADS display mode as an example to describe the technical solution of the present invention, the present invention is not limited to the ADS display mode, and the embodiment is also applicable to an In Plane Switching (IPS) display mode and a Fringe Field Switching (FFS) display mode. The process of manufacturing the display panel described in this embodiment is only an example, and in actual implementation, the structure of each substrate and the process of manufacturing each substrate may be adjusted according to actual needs, and this embodiment is not limited in this respect. For example, the polarizing layer and/or the high-resistance layer of the second substrate may also be disposed on the first surface of the second base. As another example, the locations of the polarizing layer and the high-resistance layer may be interchanged. For example, a protective layer of only one polarizing layer may be provided.
Second embodiment
Fig. 10 is a schematic plan view of a brightness control panel according to a second embodiment of the present invention, and fig. 11 is a schematic plan view of an image display panel according to the second embodiment of the present invention. This embodiment is an extension of the first embodiment, and the main structure of the display panel is substantially the same as that of the first embodiment, and includes an image display panel and a brightness control panel stacked together, where the brightness control panel is composed of a first substrate, a first liquid crystal layer, and a second substrate, the image display panel is composed of a second substrate, a second liquid crystal layer, and a third substrate, and the image display panel and the brightness control panel share a second substrate. As shown in fig. 10 and 11, different from the first embodiment, in the first array structure layer of this embodiment, the first strip-shaped electrodes of the first pixel electrodes 13 are in a zigzag shape, and the first strip-shaped electrodes extend along Two directions, so that the light-controlling pixels are in a Two-Domain (Two-Domain) pixel structure, and in the second array structure layer, the plurality of second strip-shaped electrodes of the second pixel electrodes 23 are in a zigzag shape, so that the display pixels are in a Two-Domain pixel structure, and the shapes of the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical with respect to the gate lines (or the data lines). The manufacturing process of the display panel of this embodiment is the same as that of the first embodiment, and only when the plurality of first and second stripe electrodes are formed, the plurality of first and second stripe electrodes have corresponding zigzag shapes. In practical implementation, a Multi-Domain (Multi Domain) pixel structure can also be realized by designing the shapes of the strip-shaped electrodes.
The present embodiment also achieves the technical effects of the first embodiment, including improving the contrast of the large viewing angle and avoiding the moire. Further, in the embodiment, the light control pixels and the display pixels are arranged in a double-domain or multi-domain pixel structure, and liquid crystal molecules are deflected symmetrically up and down (or symmetrically deflected left and right) in one pixel, so that the viewing angle difference is eliminated, the effective optical path difference Δ nd of two layers of liquid crystals is further compensated, the variation of Δ nd caused by the viewing angle change is further reduced, and the large viewing angle contrast is further improved.
Third embodiment
This embodiment is an extension of the first and second embodiments, and the main structure of the display panel is substantially the same as that of the first and second embodiments, and includes an image display panel and a brightness control panel, which are stacked, the brightness control panel is composed of a first substrate, a first liquid crystal layer, and a second substrate, the image display panel is composed of a second substrate, a second liquid crystal layer, and a third substrate, and the image display panel and the brightness control panel share a second substrate. Unlike the first embodiment, the pretilt angles of the liquid crystal molecules in the image display panel and the brightness control panel of this embodiment are symmetric. The pretilt angle is the included angle between the liquid crystal molecules and the pixel plane.
Specifically, the liquid crystal molecules of the first liquid crystal layer in the luminance control panel are set to have a pretilt angle of 0 to +5 °, and the liquid crystal molecules of the second liquid crystal layer in the image display panel are set to have a pretilt angle of 0 to-5 °, by alignment treatment (such as rubbing alignment or photo-alignment) of the respective alignment layers. Like this, because two-layer liquid crystal symmetry sets up, when liquid crystal molecule during operation, the liquid crystal molecule of first liquid crystal layer is opposite with the liquid crystal molecule synchronous revolution's of second liquid crystal layer direction, can reduce because the optical path difference that visual angle change arouses to black picture light that spills when reducing the large visual angle, white picture outgoing's light when increasing the large visual angle, thereby promote large visual angle contrast. Of course, the liquid crystal molecules of the first liquid crystal layer may be set to a pretilt angle of 0 to-5 °, and the liquid crystal molecules of the second liquid crystal layer may be set to a pretilt angle of 0 to +5 °.
In practical implementation, the first array structure layer and the second array structure layer of this embodiment may be designed to have the same structure, that is, the shapes of the first strip-shaped electrode and the second strip-shaped electrode are the same, and the second pixel domain and the first pixel domain are symmetrical by symmetrically arranging two layers of liquid crystals.
The present embodiment also achieves the technical effects of the first embodiment, including improving the contrast of the large viewing angle and avoiding the moire. Furthermore, the pretilt angles of the liquid crystal molecules in the two liquid crystal layers are symmetrically arranged, so that the variation of the effective optical path difference delta nd caused by the change of the viewing angle can be further reduced, and the large viewing angle contrast is further improved.
Fourth embodiment
This embodiment is an extension of the first and second embodiments, and the main structure of the display panel is substantially the same as that of the first and second embodiments, and includes an image display panel and a brightness control panel, which are stacked, the brightness control panel is composed of a first substrate, a first liquid crystal layer, and a second substrate, the image display panel is composed of a second substrate, a second liquid crystal layer, and a third substrate, and the image display panel and the brightness control panel share a second substrate. Unlike the first embodiment, the physical properties of the liquid crystal molecules in the image display panel and the luminance control panel of this embodiment are symmetrical structures. A first liquid crystal layer in the brightness control screen adopts positive liquid crystal, and a second liquid crystal layer in the image display screen adopts negative liquid crystal; alternatively, the first liquid crystal layer uses negative liquid crystal, and the second liquid crystal layer uses positive liquid crystal.
Specifically, for the refractive index no of the ordinary light (o light), the refractive index ne of the extraordinary light (e light), the positive liquid crystal is ne < no, and the negative liquid crystal is no > ne. Like this, because the rerum natura symmetry of two-layer liquid crystal sets up, not only can compensate the difference that individual layer liquid crystal anisotropy arouses itself, and then make L0 picture luminance reduce along with the influence of visual angle change, and when liquid crystal molecule during operation, the liquid crystal molecule of first liquid crystal layer is opposite with the liquid crystal molecule synchronous revolution's of second liquid crystal layer direction, can reduce the optical path difference because the visual angle change arouses, thereby the light that black picture spilled when reducing big visual angle, white picture outgoing's light when increasing big visual angle, thereby promote big visual angle contrast.
In practical implementation, the first array structure layer and the second array structure layer of this embodiment may be designed to have the same structure, that is, the first strip-shaped electrode and the second strip-shaped electrode have the same shape, and the second pixel domain and the first pixel domain are symmetric by the physical symmetric arrangement of the two layers of liquid crystals.
The present embodiment also achieves the technical effects of the first embodiment, including improving the contrast of the large viewing angle and avoiding the moire. Further, the two liquid crystal layers of the present embodiment adopt a positive liquid crystal and negative liquid crystal matching design, so that the influence of the L0 picture brightness along with the change of the viewing angle can be further reduced.
Fifth embodiment
The embodiment of the invention also provides a display device which comprises the display panel. The display device can be a vehicle-mounted display, and can also be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame and the like.
In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A display panel is characterized by comprising a first substrate, a second substrate, a third substrate, a first liquid crystal layer arranged between the first substrate and the second substrate, and a second liquid crystal layer arranged between the second substrate and the third substrate; the first substrate, the first liquid crystal layer and the second substrate form a brightness control screen for controlling brightness, the second substrate, the second liquid crystal layer and the third substrate form an image display screen for displaying images, the brightness control screen comprises a plurality of light control pixels, the image display screen comprises a plurality of display pixels, pixel domains of the display pixels are the same as those of the light control pixels, and pretilt angles of liquid crystal molecules in the image display screen and the brightness control screen are of a symmetrical structure.
2. The display panel of claim 1, wherein the first substrate comprises a first base and a first array structure layer disposed on a surface of the first base facing the second substrate; the second substrate comprises a second base, a polarization structure layer arranged on the surface of one side, facing the first substrate, of the second base and a second array structure layer arranged on the surface of one side, facing the third substrate, of the second base; the third substrate comprises a third substrate and a color film structure layer arranged on the surface of one side, facing the second substrate, of the third substrate.
3. The display panel of claim 2, wherein the first array structure layer comprises a plurality of light-control pixels arranged in a matrix defined by a plurality of first gate lines and a plurality of first data lines crossing perpendicularly, and a plurality of first strip-shaped electrodes are disposed in the light-control pixels; the second array structure layer comprises a plurality of display pixels which are defined by a plurality of second grid lines and a plurality of second data lines in a crossed mode and are arranged in a matrix mode, and the display pixels comprise a plurality of second strip-shaped electrodes; the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a vertical axis, or the first strip-shaped electrodes and the second strip-shaped electrodes are symmetrical relative to a horizontal axis.
4. The display panel according to claim 3, wherein the first strip-shaped electrode and the second strip-shaped electrode comprise a straight line shape or a zigzag line shape.
5. The display panel according to claim 2, wherein the polarization structure layer comprises a high-resistance layer, a protective layer and a polarization layer stacked on a surface of the second substrate facing the first substrate.
6. The display panel according to claim 5, wherein the sheet resistance of the high-resistance layer is 108～1010Ohm per square.
7. The display panel according to claim 2, wherein the color film structure layer comprises a transparent conductive layer disposed on the first substrate, and a black matrix and a color photoresist disposed on the transparent conductive layer.
8. The display panel according to any one of claims 1 to 7, wherein the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to +5 °, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to-5 °; or the pretilt angle of the liquid crystal molecules in the first liquid crystal layer is 0 to minus 5 degrees, and the pretilt angle of the liquid crystal molecules in the second liquid crystal layer is 0 to plus 5 degrees.
9. The display panel according to any one of claims 1 to 7, wherein the first liquid crystal layer is a positive liquid crystal, and the second liquid crystal layer is a negative liquid crystal; or the first liquid crystal layer is negative liquid crystal, and the second liquid crystal layer is positive liquid crystal.
10. The display panel according to any one of claims 1 to 7, wherein a ratio of a resolution of the image display panel to a resolution of the luminance control panel is a positive integer greater than or equal to 1.
11. The display panel according to any one of claims 1 to 7, wherein the display mode of the display panel comprises an advanced super-dimensional field switching display mode, a planar switching display mode or a fringe field switching display mode.
12. A display device comprising the display panel according to any one of claims 1 to 11.
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| CN111240057B (en) * | 2020-02-24 | 2022-04-26 | 惠州市华星光电技术有限公司 | Error compensation equipment and error compensation method |
| CN111258133A (en) * | 2020-03-10 | 2020-06-09 | Tcl华星光电技术有限公司 | Display panel, preparation method thereof and display device |
| CN111372020B (en) * | 2020-03-18 | 2023-05-16 | 康佳集团股份有限公司 | Image display method, terminal and storage medium for enhancing contrast |
| CN113495381A (en) * | 2020-03-19 | 2021-10-12 | 咸阳彩虹光电科技有限公司 | Black-white display panel, double-layer liquid crystal display panel and double-layer liquid crystal display device |
| CN111258134B (en) * | 2020-03-19 | 2022-03-08 | Tcl华星光电技术有限公司 | Display panel |
| US11852921B2 (en) * | 2020-03-27 | 2023-12-26 | Beijing Boe Optoelectronics Technology Co., Ltd. | Alignment deviation detection method and apparatus thereof, data compensation method and apparatus thereof |
| CN111812870B (en) * | 2020-07-06 | 2023-02-28 | 昆山龙腾光电股份有限公司 | Display panel and display device |
| CN111965886A (en) * | 2020-09-02 | 2020-11-20 | 厦门天马微电子有限公司 | Display panel and display device |
| US11721297B2 (en) | 2020-11-12 | 2023-08-08 | Beijing Boe Display Technology Co., Ltd. | Display method, display device, and storage medium |
| CN114019738A (en) * | 2021-11-19 | 2022-02-08 | 惠科股份有限公司 | Array substrate, display panel and manufacturing method thereof |
| CN114296268B (en) * | 2022-01-21 | 2022-10-25 | 惠科股份有限公司 | Liquid crystal display panel and display device |
| CN114859610B (en) * | 2022-05-24 | 2023-06-16 | 重庆惠科金渝光电科技有限公司 | Display screen and display device |
| WO2024045055A1 (en) * | 2022-08-31 | 2024-03-07 | 京东方科技集团股份有限公司 | Lens, lens array, display module, and display apparatus |
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