CN116909059A - Display substrate and display device - Google Patents
Display substrate and display device Download PDFInfo
- Publication number
- CN116909059A CN116909059A CN202310912585.3A CN202310912585A CN116909059A CN 116909059 A CN116909059 A CN 116909059A CN 202310912585 A CN202310912585 A CN 202310912585A CN 116909059 A CN116909059 A CN 116909059A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- layer
- crystal layer
- optical film
- display substrate
- 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.)
- Granted
Links
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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133541—Circular polarisers
-
- 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
-
- 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
-
- 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
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
-
- 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
- G02F2203/00—Function characteristic
- G02F2203/07—Polarisation dependent
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Liquid Crystal (AREA)
Abstract
本申请提供一种显示基板及显示装置。显示基板包括第一液晶层和光学膜层。第一液晶层包括胆甾相液晶分子，胆甾相液晶分子的螺旋方向为第一旋向。光学膜层位于第一液晶层背离显示基板的显示面的一侧。显示基板被配置为：在未对第一液晶层施加电场的情况下，入射至第一液晶层的环境光中的第一旋向的圆偏振光被第一液晶层反射并出射，环境光中的第二旋向的圆偏振光通过第一液晶层入射至光学膜层并转换为向第一液晶层入射的第二旋向的圆偏振光，入射至所述第一液晶层的第二旋向的圆偏振光通过第一液晶层出射；在对第一液晶层施加电场的情况下，入射至第一液晶层的环境光通过第一液晶层入射至光学膜层并被光学膜层吸收。第一旋向与第二旋向相反。
This application provides a display substrate and a display device. The display substrate includes a first liquid crystal layer and an optical film layer. The first liquid crystal layer includes cholesteric liquid crystal molecules, and the helical direction of the cholesteric liquid crystal molecules is the first helical direction. The optical film layer is located on a side of the first liquid crystal layer facing away from the display surface of the display substrate. The display substrate is configured such that when no electric field is applied to the first liquid crystal layer, the first circularly polarized light of the first rotation direction in the ambient light incident on the first liquid crystal layer is reflected by the first liquid crystal layer and emitted. In the ambient light The circularly polarized light of the second rotation direction is incident on the optical film layer through the first liquid crystal layer and converted into the circularly polarized light of the second rotation direction incident on the first liquid crystal layer. The second rotation direction circularly polarized light incident on the first liquid crystal layer is Circularly polarized light is emitted through the first liquid crystal layer; when an electric field is applied to the first liquid crystal layer, ambient light incident on the first liquid crystal layer is incident on the optical film layer through the first liquid crystal layer and is absorbed by the optical film layer. The first direction of rotation is opposite to the second direction of rotation.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display substrate and a display device.
Background
With the continuous development of display technology, display devices such as mobile phones, notebooks, televisions, etc. have become necessities in the work and life of people. Liquid crystal display devices have become the mainstream display devices because of their high brightness, bright color, large viewing angle, and the like.
Cholesteric liquid crystal molecules can be used in reflective display devices that utilize ambient light as a light source for display, which can reduce power consumption of the display device. At present, when cholesteric liquid crystal molecules are used for reflective display devices, the utilization rate of ambient light by the display devices is low, and the brightness of the display devices is affected.
Disclosure of Invention
The application provides a display substrate and a display device.
According to a first aspect of an embodiment of the present application, there is provided a display substrate. The display substrate includes:
the first liquid crystal layer comprises cholesteric liquid crystal molecules, and the helical direction of the cholesteric liquid crystal molecules is a first helical direction;
the optical film layer is positioned at one side of the first liquid crystal layer, which is away from the display surface of the display substrate;
the display substrate is configured to: when an electric field is not applied to the first liquid crystal layer, the circularly polarized light with the first rotation direction in the ambient light entering the first liquid crystal layer is reflected and emitted by the first liquid crystal layer, the circularly polarized light with the second rotation direction in the ambient light enters the optical film layer through the first liquid crystal layer, the circularly polarized light with the second rotation direction entering the optical film layer is converted into the circularly polarized light with the second rotation direction entering the first liquid crystal layer, and the circularly polarized light with the second rotation direction entering the first liquid crystal layer exits through the first liquid crystal layer; when an electric field is applied to the first liquid crystal layer, ambient light incident on the first liquid crystal layer is incident on and absorbed by the optical film layer through the first liquid crystal layer; wherein the first direction of rotation is opposite the second direction of rotation.
In one embodiment, in a direction away from the first liquid crystal layer, the optical film layer includes a first phase deviation film, a first sub-optical film layer, a second phase deviation film, a second sub-optical film layer, and a reflective layer that are stacked in order;
the first phase deviation film and the second phase deviation film are both configured to deflect the phase of the passing light by pi/2; the optical axis of the first phase deviation film and the optical axis of the second phase deviation film are parallel to each other; the first sub-optical film layer is configured to pass light from the first phase deviation film when no electric field is applied to the first liquid crystal layer, and to deflect the phase of light from the first phase deviation film by pi/2 when an electric field is applied to the first liquid crystal layer, and to absorb light from the second sub-optical film; the second sub-optical film layer is configured to deflect the phase of the passing light by pi/2 when no electric field is applied to the first liquid crystal layer, and to prevent the polarization direction of the passing light from being changed when an electric field is applied to the first liquid crystal layer.
In one embodiment, the first sub-optical film layer comprises a polarizing film; in a direction from the first liquid crystal layer to the optical film layer, a transmission axis of the polarizing film is deflected by 45 ° in the second rotational direction with respect to an optical axis of the first phase deviation film.
In one embodiment, the second sub-optical film layer comprises a second liquid crystal layer comprising nematic liquid crystal molecules; the alignment of the liquid crystal molecules of the second liquid crystal layer and the optical axis of the first phase deviation film are parallel to each other when no electric field is applied to the second liquid crystal layer.
In one embodiment, the optical film layer further includes a first electrode located on a side of the second liquid crystal molecular layer facing the first liquid crystal layer, the reflective layer is made of a conductive material, and the reflective layer includes a second electrode; one of the first electrode and the second electrode is a pixel electrode, and the other is a common electrode.
In one embodiment, the optical film layer further comprises a first electrode located on one side of the second liquid crystal molecular layer facing the first liquid crystal layer, and a second electrode located on one side of the second liquid crystal molecular layer facing away from the first liquid crystal layer, and the reflecting layer is located on one side of the second electrode facing away from the first liquid crystal layer; the first electrode and the second electrode are made of light-transmitting materials.
In one embodiment, the first direction of rotation is clockwise and the second direction of rotation is counter-clockwise.
In one embodiment, the first direction of rotation is counter-clockwise and the second direction of rotation is clockwise.
In one embodiment, the cholesteric liquid crystal molecules have a plurality of different pitches ranging fromWherein n is o Refractive index for ordinary ray of the cholesteric liquid crystal molecules, n e For the bladderThe steroid-phase liquid crystal molecules have refractive indices for extraordinary rays.
In one embodiment, the first liquid crystal layer includes nematic liquid crystal molecules and chiral polymerizable monomers, and the concentration of chiral polymerizable monomers in the regions of the first liquid crystal layer having a large pitch is less than the concentration of chiral polymerizable monomers in the regions having a small pitch.
In one embodiment, the display substrate further includes a color film layer located on a side of the first liquid crystal layer facing away from the optical film layer, where the color film layer includes color filter portions of at least three different colors.
In one embodiment, the cholesteric liquid crystal molecules have a helical pitch; the optical film layer comprises a second liquid crystal layer, the display substrate further comprises a color film layer positioned on one side of the second liquid crystal layer facing the first liquid crystal layer, and the color film layer comprises a color filter part with one color.
According to a second aspect of an embodiment of the present application, there is provided a display device including the display substrate described above.
According to the display substrate and the display device provided by the embodiment of the application, the optical film layer is arranged on one side of the first liquid crystal layer, which is away from the display surface of the display substrate, and when no electric field is applied to the first liquid crystal layer, the optical film layer can reflect the circularly polarized light with the second rotation direction which is incident to the first liquid crystal layer so as to be converted into the circularly polarized light with the second rotation direction which is incident to the first liquid crystal layer, and the circularly polarized light with the second rotation direction which is incident to the first liquid crystal layer can be emitted through the first liquid crystal layer, so that the utilization rate of the display device to the ambient light is lower, and the brightness of the display device is further increased.
Drawings
Fig. 1 is a partial cross-sectional view of a display substrate provided in an exemplary embodiment of the present application;
fig. 2 is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of the present application;
fig. 3 is a partial cross-sectional view of a display substrate provided by yet another exemplary embodiment of the present application;
fig. 4 is a partial cross-sectional view of a display substrate provided in accordance with still another exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
The embodiment of the application provides a display substrate and a display device. The display substrate and the display device according to the embodiments of the present application will be described in detail with reference to the accompanying drawings. The features of the embodiments described below can be supplemented or combined with one another without conflict.
The embodiment of the application provides a display substrate. As shown in fig. 1, the display substrate includes a first liquid crystal layer 10 and an optical film layer 20.
The first liquid crystal layer 10 includes cholesteric liquid crystal molecules 101, and a helical direction of the cholesteric liquid crystal molecules 101 is a first helical direction. The optical film layer 20 is located at a side of the first liquid crystal layer 10 away from the display surface of the display substrate. The display substrate is configured to: when an electric field is not applied to the first liquid crystal layer 10, the circularly polarized light of the first rotation direction of the ambient light incident on the first liquid crystal layer 10 is reflected by the first liquid crystal layer and emitted, the circularly polarized light of the second rotation direction of the ambient light is incident on the optical film layer 20 through the first liquid crystal layer 10, the circularly polarized light of the second rotation direction of the incident on the optical film layer 20 is converted into the circularly polarized light of the second rotation direction of the incident on the first liquid crystal layer 10 by the optical film layer, and the circularly polarized light of the second rotation direction of the incident on the first liquid crystal layer 10 is emitted through the first liquid crystal layer 10; when an electric field is applied to the first liquid crystal layer 10, ambient light incident on the first liquid crystal layer 10 is incident on the optical film layer 20 through the first liquid crystal layer 10 and absorbed by the optical film layer 20. Wherein the first direction of rotation is opposite the second direction of rotation.
According to the display substrate provided by the embodiment of the application, the optical film layer is arranged on one side of the first liquid crystal layer, which is away from the display surface of the display substrate, and when no electric field is applied to the first liquid crystal layer, the optical film layer can reflect the circularly polarized light with the second rotation direction which is incident on the first liquid crystal layer to be converted into the circularly polarized light with the second rotation direction which is incident on the first liquid crystal layer, and the circularly polarized light with the second rotation direction which is incident on the first liquid crystal layer can be emitted through the first liquid crystal layer, so that the utilization rate of the display device to ambient light is lower, and the brightness of the display device is further increased; under the condition that an electric field is applied to the first liquid crystal layer, all ambient light incident on the first liquid crystal layer can be incident on the optical film layer through the first liquid crystal layer and absorbed by the optical film layer, so that dark state display, namely non-display state of the display substrate can be realized.
It should be noted that, in the embodiments of the present application, the "first rotation direction" and the "second rotation direction" are all rotation directions in a direction facing the light propagation direction. For example, the first liquid crystal layer 10 reflects and emits circularly polarized light of a first rotation direction in the incident ambient light, the first rotation direction being a rotation direction in a direction in which the optical film layer 20 points to the first liquid crystal layer 10. The direction of rotation of the liquid crystal molecules in the first liquid crystal layer also refers to the direction of rotation in which the optical film layer 20 points toward the first liquid crystal layer 10.
In one embodiment, as shown in fig. 1, the display substrate includes a first liquid crystal cell 30, and the first liquid crystal cell 30 includes a first liquid crystal layer 10. The first liquid crystal cell 30 further comprises a third electrode 11 at a side of the first liquid crystal layer 10 facing the optical film layer 20, a first driving circuit layer 14 at a side of the third electrode 11 facing the optical film layer 20, a first substrate 15 at a side of the first driving circuit layer 14 facing the optical film layer 20, a fourth electrode 12 at a side of the first liquid crystal layer 10 facing away from the optical film layer 20, and a second substrate 16 at a side of the fourth electrode 12 facing away from the optical film layer 20. One of the third electrode 11 and the fourth electrode 12 is a pixel electrode, and the other is a common electrode, and an electric field can be applied to the first liquid crystal layer through the third electrode 11 and the fourth electrode 12. In some embodiments, the third electrode 11 is a pixel electrode and the fourth electrode 12 is a common electrode. The first driving circuit layer 14 includes a plurality of pixel circuits electrically connected to the third electrode 11. The first substrate 15 and the second substrate 16 are substrates with high light transmittance, for example, the first substrate 15 and the second substrate 16 are glass substrates. The third electrode 11 and the fourth electrode 12 are both electrodes with high light transmittance, for example, the materials of the third electrode 11 and the fourth electrode 12 are indium zinc oxide or indium tin oxide.
In one embodiment, as shown in fig. 1, in a direction away from the first liquid crystal layer 10, the optical film layer 20 includes a first phase deviation film 21, a first sub-optical film layer 22, a second phase deviation film 23, a second sub-optical film layer 24, and a reflective layer 25 stacked in order. The first phase deviation film 21 and the second phase deviation film 23 are each configured to deflect the phase of the passing light by pi/2, and the optical axis of the first phase deviation film 21 and the optical axis of the second phase deviation film 23 are parallel to each other. The first sub-optical film layer 22 is configured to pass light from the first phase deviation film 21 when no electric field is applied to the first liquid crystal layer 10, and to deflect the phase of light from the first phase deviation film 21 by pi/2 when an electric field is applied to the first liquid crystal layer 10, and to absorb light from the second sub-optical film layer 24. The second sub-optical film layer 24 is configured to deflect the phase of the passing light by pi/2 when no electric field is applied to the first liquid crystal layer 10, and to prevent the polarization direction of the passing light from being changed when an electric field is applied to the first liquid crystal layer 10.
So arranged, when no electric field is applied to the first liquid crystal layer 10, ambient light is incident on the first liquid crystal layer 10, and then circularly polarized light of a first rotation direction is reflected and emitted, and circularly polarized light of a second rotation direction is incident on the first phase deviation film 21, then converted into linearly polarized light, and is incident on the second phase deviation film 23 through the first sub-optical film layer 22; the second phase deviation film 23 converts the incident linearly polarized light into circularly polarized light of the first rotation direction and is incident to the second sub-optical film layer 24; the second sub-optical film layer 24 converts the circularly polarized light of the first rotation direction into linearly polarized light, the polarization direction of the linearly polarized light is unchanged after being reflected by the reflecting layer 25, and the linearly polarized light is incident to the second sub-optical film layer 24 again; the second sub-optical film layer 24 converts the linearly polarized light into circularly polarized light of the first rotation direction and is incident on the second phase deviation film 23; the second phase deviation film 23 converts circularly polarized light of the first rotation direction into linearly polarized light and is incident to the first phase deviation film 21 through the first sub-optical film layer 22; the first phase deviation film 21 converts the linearly polarized light into circularly polarized light of the second rotation direction and emits it through the first liquid crystal layer 10. Therefore, bright state display of the display substrate can be realized, and the utilization rate of ambient light is higher.
As shown in fig. 2, when an electric field is applied to the first liquid crystal layer 10, the liquid crystal molecules of the first liquid crystal layer 10 become a vertical orientation. All of the ambient light incident on the first liquid crystal layer 10 is incident on the first phase deviation film 21 through the first liquid crystal layer 10; the phase of the light incident to the first phase deviation film 21 is not deflected, and all of the light is incident to the first sub-optical film layer 22 through the first phase deviation film 21; the first sub-optical film layer 22 converts light into linearly polarized light to be incident on the second phase deviation film 23; the second phase deviation film 23 converts the incident linearly polarized light into circularly polarized light of the first rotation direction and is incident to the reflection layer 25 through the second sub-optical film layer 24; the reflection layer 25 converts the circularly polarized light of the first rotation direction into circularly polarized light of the second rotation direction; the polarization direction of the circularly polarized light with the second rotation direction is not changed after the circularly polarized light passes through the second sub-optical film layer 24, and the circularly polarized light is incident to the second phase deviation film 23; the second phase deviation film 23 converts circularly polarized light of the second rotation direction into linearly polarized light; the linearly polarized light is absorbed by the first sub-optical film layer 22 after being incident on the first sub-optical film layer 22. Thus, dark state display of the display substrate can be realized.
In one embodiment, the first sub-optical film layer 22 comprises a polarizing film; in a direction directed from the first liquid crystal layer 10 to the optical film layer 20, the transmission axis of the polarizing film is deflected by 45 ° in the second rotational direction with respect to the optical axis of the first phase deviation film 21. When the electric field is not applied to the first liquid crystal layer 10, the polarization direction of the linearly polarized light incident on the polarizing film is parallel to the transmission axis of the polarizing film, and all the linearly polarized light incident on the polarizing film passes through the polarizing film; when an electric field is applied to the first liquid crystal layer 10, the polarizing film converts the ambient light incident on the polarizing film from the first phase deviation film 21 into linearly polarized light. In some embodiments, the first sub-optical film layer 22 is a polarizing film. The polarizing film may be a polarizer.
In one embodiment, as shown in fig. 1 and 2, the second sub-optical film layer 24 includes a second liquid crystal layer 240, and the second liquid crystal layer 240 includes nematic liquid crystal molecules 241; the alignment of the liquid crystal molecules of the second liquid crystal layer 240 and the optical axis of the first phase deviation film 21 are parallel to each other when no electric field is applied to the second liquid crystal layer. In this way, when no electric field is applied to the first liquid crystal layer 10, no electric field is applied to the second liquid crystal layer 240, the circularly polarized light of the first rotation direction incident on the second liquid crystal layer 240 from the second phase deviation film 23 is converted into linearly polarized light, and the polarization direction of the linearly polarized light is perpendicular to the transmission axis of the polarizing film; when the linearly polarized light is reflected by the reflection layer 25 and then is incident again on the second liquid crystal layer 240, the second liquid crystal layer 240 converts the linearly polarized light into circularly polarized light of the first rotation direction. As shown in fig. 2, when an electric field is applied to the first liquid crystal layer 10, an electric field is applied to the second liquid crystal layer 240, and both the liquid crystal molecules of the first liquid crystal layer 10 and the liquid crystal molecules of the second liquid crystal layer 240 are converted into vertical orientations. The circularly polarized light of the first rotation direction incident to the second liquid crystal layer 240 from the second phase deviation film 23 passes through the second liquid crystal layer 240 without changing the polarization direction; the circularly polarized light of the first rotation direction is converted into circularly polarized light of the second rotation direction after being reflected by the reflecting layer 25; the circularly polarized light of the second rotation direction passes through the second liquid crystal layer 240 without change of polarization direction. In the case where an electric field is applied to the first liquid crystal layer 10 and the second liquid crystal layer 240, a vertical electric field may be applied to the first liquid crystal layer 10 and the second liquid crystal layer 240, respectively.
In one embodiment, as shown in fig. 1 and 2, the optical film layer 20 includes a second liquid crystal cell 40, where the second liquid crystal cell 40 includes a second liquid crystal layer 240, a first alignment film 28 located on a side of the second liquid crystal layer 240 facing the first liquid crystal layer 10, a first electrode 27 located on a side of the first alignment film 28 facing the first liquid crystal layer 10, a third substrate 26 located on a side of the first electrode 27 facing the first liquid crystal layer 10, a second alignment film 291 located on a side of the second liquid crystal layer 240 facing away from the first liquid crystal layer 10, a second electrode 295 located on a side of the second alignment film 291 facing away from the first liquid crystal layer 10, a second driving circuit layer 292 located on a side of the second electrode 295 facing away from the first liquid crystal layer 10, and a fourth substrate 293 located on a side of the second driving circuit layer 292 facing away from the first liquid crystal layer 10. The alignment of the first alignment film 28 and the alignment of the second alignment film 291 are parallel to each other when no electric field is applied to the second liquid crystal layer 240. One of the first electrode 27 and the second electrode 295 is a pixel electrode, and the other is a common electrode, and an electric field can be applied to the second liquid crystal layer 240 through the first electrode 27 and the second electrode 295. In some embodiments, the first electrode 27 is a common electrode and the second electrode 295 is a pixel electrode. The second driving circuit layer 292 includes a plurality of pixel driving circuits, and the pixel driving circuits are electrically connected to the second electrode 295. The third substrate 26 and the fourth substrate 293 are substrates with high light transmittance, for example, the third substrate 26 and the fourth substrate 293 are glass substrates.
In one embodiment, the first phase deviation film 21 and the second phase deviation film 23 may be obtained by coating a material having a phase deviation effect. This makes the thicknesses of the first phase deviation film 21 and the second phase deviation film 23 smaller, contributing to a reduction in the thickness of the display substrate. In other embodiments, the first phase deviation film 21 and the second phase deviation film 23 may be quarter wave plates.
In one embodiment, as shown in fig. 1 and 2, the reflective layer 25 includes a second electrode 295, and the reflective layer 25 is made of a conductive material. The reflective layer 25 is multiplexed as the second electrode, which helps to simplify the film structure of the display substrate and reduce the thickness of the display substrate. In this embodiment, the first electrode 27 is an electrode with high light transmittance, for example, the material of the first electrode 27 is indium zinc oxide or indium tin oxide; the second electrode 295 is a relatively high reflectivity electrode, and the second electrode 295 includes a silver film, for example, the second electrode 295 includes two light-transmissive films and a silver film between the two light-transmissive films.
In another embodiment, the reflective layer 25 is located on a side of the second electrode 295 facing away from the first liquid crystal layer 10; the materials of the first electrode 27 and the second electrode 295 are light-transmitting materials. In this embodiment, the light passing through the second liquid crystal layer 240 passes through the second electrode 295 and then enters the reflective layer 25. The reflective layer 25 is provided with a via hole, and the second electrode 295 is electrically connected through a pixel circuit of the via hole second driving circuit layer of the reflective layer 25. The materials of the first electrode 27 and the second electrode 295 are, for example, indium zinc oxide or indium tin oxide.
In one embodiment, the first direction of rotation is clockwise and the second direction of rotation is counter-clockwise. For convenience of description, the circularly polarized light of the first rotation direction is simply referred to as right-handed circularly polarized light, and the circularly polarized light of the second rotation direction is simply referred to as left-handed circularly polarized light.
In this embodiment, in the case where no electric field is applied to the first liquid crystal layer 10, the propagation process of the light after the ambient light is incident on the display substrate is as follows: after the ambient light is incident on the first liquid crystal layer 10, the right-hand circularly polarized light is reflected and emitted, and the left-hand circularly polarized light is incident on the first phase deviation film 21, converted into linearly polarized light and incident on the second phase deviation film 23 through the first sub-optical film layer 22; the second phase deviation film 23 converts the incident linearly polarized light into right-hand circularly polarized light and incident on the second sub-optical film layer 24; the second sub-optical film layer 24 converts the right-hand circularly polarized light into linearly polarized light, the polarization direction of the linearly polarized light is unchanged after being reflected by the reflecting layer 25, and the linearly polarized light is incident to the second sub-optical film layer 24 again; the second sub-optical film layer 24 converts the linearly polarized light into right-hand circularly polarized light and makes it incident on the second phase deviation film 23; the second phase deviation film 23 converts the right-hand circularly polarized light into linearly polarized light and enters the first phase deviation film 21 through the first sub-optical film layer 22; the first phase deviation film 21 converts the linearly polarized light into left-hand circularly polarized light, which exits through the first liquid crystal layer 10.
In this embodiment, when an electric field is applied to the first liquid crystal layer 10, the propagation process of the light after the ambient light is incident on the display substrate is as follows: after the ambient light is incident on the first liquid crystal layer 10, all of the ambient light is incident on the first phase deviation film 21 through the first liquid crystal layer 10; the phase of the light incident to the first phase deviation film 21 is not deflected, and all of the light is incident to the first sub-optical film layer 22 through the first phase deviation film 21; the first sub-optical film layer 22 converts light into linearly polarized light to be incident on the second phase deviation film 23; the second phase deviation film 23 converts the incident linearly polarized light into right-hand circularly polarized light and is incident to the reflection layer 25 through the second sub-optical film layer 24; the reflection layer 25 converts the right-handed circularly polarized light into left-handed circularly polarized light; the left-hand circularly polarized light passes through the second sub-optical film layer 24 and is incident on the second phase deviation film 23; the second phase deviation film 23 converts the left-hand circularly polarized light into linearly polarized light; the linearly polarized light is absorbed by the first sub-optical film layer 22 after being incident on the first sub-optical film layer 22.
In another embodiment, the first direction of rotation is counter-clockwise and the second direction of rotation is clockwise. For convenience of description, the circularly polarized light of the first rotation direction is simply referred to as left-handed circularly polarized light, and the circularly polarized light of the second rotation direction is simply referred to as right-handed circularly polarized light.
In this embodiment, in the case where no electric field is applied to the first liquid crystal layer 10, the propagation process of the light after the ambient light is incident on the display substrate is as follows: after the ambient light is incident on the first liquid crystal layer 10, the left-hand circularly polarized light is reflected and emitted, and after the right-hand circularly polarized light is incident on the first phase deviation film 21, the ambient light is converted into linearly polarized light and is incident on the second phase deviation film 23 through the first sub-optical film layer 22; the second phase deviation film 23 converts the incident linearly polarized light into left-hand circularly polarized light and incident on the second sub-optical film layer 24; the second sub-optical film layer 24 converts the left-hand circularly polarized light into linearly polarized light, the polarization direction of the linearly polarized light is unchanged after being reflected by the reflecting layer 25, and the linearly polarized light is incident to the second sub-optical film layer 24 again; the second sub-optical film layer 24 converts the linearly polarized light into left-hand circularly polarized light and makes it incident on the second phase deviation film 23; the second phase deviation film 23 converts the left-hand circularly polarized light into linearly polarized light, and the linearly polarized light is incident to the first phase deviation film 21 through the first sub-optical film layer 22; the first phase deviation film 21 converts the linearly polarized light into right-hand circularly polarized light, and the right-hand circularly polarized light exits through the first liquid crystal layer 10.
In this embodiment, when an electric field is applied to the first liquid crystal layer 10, the propagation process of the light after the ambient light is incident on the display substrate is as follows: after the ambient light is incident on the first liquid crystal layer 10, all of the ambient light is incident on the first phase deviation film 21 through the first liquid crystal layer 10; the phase of the light incident to the first phase deviation film 21 is not deflected, and all of the light is incident to the first sub-optical film layer 22 through the first phase deviation film 21; the first sub-optical film layer 22 converts light into linearly polarized light to be incident on the second phase deviation film 23; the second phase deviation film 23 converts the incident linearly polarized light into left-hand circularly polarized light and is incident to the reflection layer 25 through the second sub-optical film layer 24; the reflection layer 25 converts the left-handed circularly polarized light into right-handed circularly polarized light; the right-hand circularly polarized light passes through the second sub-optical film layer 24 and is incident on the second phase deviation film 23; the second phase deviation film 23 converts the right-hand circularly polarized light into linearly polarized light; the linearly polarized light is absorbed by the first sub-optical film layer 22 after being incident on the first sub-optical film layer 22.
In one embodiment, the cholesteric liquid crystal molecules have a plurality of different pitches ranging from 380nm to 780nm. So arranged, the first liquid crystal layer 10 can reflect light rays with the wavelength range ofWherein n is o Refractive index for ordinary ray of the cholesteric liquid crystal molecules, n e Is unusual for the cholesteric liquid crystal moleculesRefractive index of light. The first liquid crystal layer can reflect all light rays in the visible light wave band, so that the emergent light rays are white, and the display substrate can display black and white colors. The pitch, the wavelength of light that the liquid crystal molecules can reflect, and the refractive index of the liquid crystal molecules satisfy the following relation: p=λ/n. Wherein p is the pitch, lambda is the wavelength of light that can be reflected by the liquid crystal molecules, and n is the refractive index of the liquid crystal molecules.
In one embodiment, the first liquid crystal layer 10 includes nematic liquid crystal molecules and chiral polymerizable monomers, and the concentration of chiral polymerizable monomers in the regions of the first liquid crystal layer having a large pitch is less than the concentration of chiral polymerizable monomers in the regions having a small pitch. The greater the concentration of chiral polymerizable monomer, the shorter the pitch of the liquid crystal molecules. The cholesteric liquid crystal molecules can be achieved with a variety of different pitches by controlling the concentration of chiral polymerizable monomers in different regions of the first liquid crystal layer.
In one embodiment, a first liquid crystal layer comprising cholesteric liquid crystal molecules having a plurality of different pitches may be prepared by: firstly, mixing nematic liquid crystal, chiral polymerizable monomer, photoinitiator and ultraviolet light absorbent, dripping the obtained mixed solvent on one of a first substrate and a second substrate, and aligning the first substrate and the second substrate; then, the mixed solvent is irradiated with ultraviolet light. Due to the presence of the ultraviolet light absorber, an ultraviolet light intensity gradient is formed between the first substrate and the second substrate when the ultraviolet light irradiates the mixed solvent. The chiral polymerizable monomer in the region with high ultraviolet light intensity is high in polymerization speed, the chiral polymerizable monomer in the region with low ultraviolet light intensity is slow in polymerization, so that the concentration of the chiral polymerizable monomer is different, the chiral polymerizable monomer is diffused from the region with high concentration to the region with low concentration, namely from the region with low ultraviolet light intensity to the region with high ultraviolet light intensity, and finally, the concentration of the chiral polymerizable monomer in the region with high ultraviolet light intensity is high, and the pitch of the region is short; the chiral polymerizable monomer content is low in the region of low ultraviolet light intensity, and the pitch of the region is long. The first liquid crystal cell can be formed by the above-described process. The chiral polymerizable monomer can be a left-handed chiral polymerizable monomer or a right-handed chiral polymerizable monomer.
In one embodiment, the thickness of the first liquid crystal cell 30 is 5 μm to 30 μm. The thickness of the first liquid crystal cell 30 is, for example, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, or the like.
In one embodiment, the thickness of the second liquid crystal cell 40 is 1 μm to 5 μm. The thickness of the second liquid crystal cell 40 is, for example, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, or the like.
In one embodiment, as shown in fig. 3, the display substrate further includes a color film layer 17 located on a side of the first liquid crystal layer 10 facing away from the optical film layer 20, where the color film layer 17 includes at least three color filtering portions with different colors. Thus, the display substrate can display a color picture. In some embodiments, the color film layer 17 may include color filters of three colors of red, green and blue.
Further, as shown in fig. 3, the color film layer 17 is located between the fourth electrode 12 and the second substrate 16.
In another embodiment, the cholesteric liquid crystal molecules have a helical pitch. As shown in fig. 4, the display substrate further includes a color film layer 294 located on a side of the second liquid crystal layer 240 facing the first liquid crystal layer 10, the color film layer 294 includes a color filter portion of one color, and the color of the light reflected by the cholesteric liquid crystal molecules is the same as the color of the color filter portion. The display substrate can display the color of the color filter part. In some embodiments, the color of the color filter may be red, or blue, or green.
Further, as shown in fig. 4, the color film layer 294 is located between the first electrode 27 and the third substrate 26.
According to the display substrate provided by the embodiment of the application, the switching time of cholesteric liquid crystal molecules between the planar orientation and the vertical orientation is only a few milliseconds, the speed of switching pictures of the display substrate is very high, and the use experience of a user is improved. In the embodiment of the application, the plane orientation of the liquid crystal molecules means that the long axis direction of the liquid crystal molecules is parallel to the display surface of the display substrate, and the vertical orientation of the liquid crystal molecules means that the long axis direction of the liquid crystal molecules is perpendicular to the display surface of the display substrate.
The embodiment of the application also provides a preparation method of the display substrate. The following describes a process for preparing a display substrate, taking the display substrate shown in fig. 1 as an example:
first, the first liquid crystal cell 30 is prepared.
In one embodiment, the first liquid crystal cell is prepared as follows: sequentially forming a first driving circuit layer 14 and a third electrode 11 on a first substrate 15 to obtain a first sub-substrate; forming a fourth electrode 12 on the second substrate 16 to obtain a second sub-substrate; one of the first sub-substrate and the second sub-substrate is provided with a first liquid crystal layer 10, and the other is provided with a frame sealing adhesive, and the first sub-substrate and the second sub-substrate are subjected to box alignment.
Subsequently, a second liquid crystal cell 40 is prepared.
In one embodiment, the first liquid crystal cell is prepared as follows: sequentially forming a first electrode 27 and a first alignment film 28 on a third substrate 26 to obtain a third sub-substrate; sequentially forming a second driving circuit layer 292, a reflective layer 25, and a second alignment film 291 on a fourth substrate 293 to obtain a fourth sub-substrate; and arranging a second liquid crystal layer on one of the first sub-substrate and the second sub-substrate, arranging frame sealing glue on the other one, and aligning the third sub-substrate with the fourth sub-substrate.
Subsequently, a first phase deviation film 21, a first sub-optical film layer 22, and a second phase deviation film 23 are sequentially formed on the first substrate 15 of the first liquid crystal cell 30, and the third substrate 26 of the second liquid crystal cell 40 and the second phase deviation film 23 are bonded together. Alternatively, the second phase deviation film 23, the first sub-optical film layer 22, and the first phase deviation film 21 are sequentially provided on the third substrate 26 of the second liquid crystal cell 40, and the first substrate 15 of the first liquid crystal cell 30 is bonded to the first phase deviation film 21.
Embodiments of the method for manufacturing a display substrate provided by the embodiments of the present application and embodiments of the display substrate belong to the same inventive concept, and descriptions of related details and beneficial effects can be referred to each other, and are not repeated here.
The embodiment of the application also provides a display device. The display device comprises the display substrate according to any of the above embodiments.
In some embodiments, the display device further comprises a housing, the display substrate being embedded within the housing.
The display device provided by the embodiment of the application can be any suitable display device, including but not limited to a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an electronic book, and any other product or component with a display function.
It is noted that in the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intervening layer or element may also be present. Like reference numerals refer to like elements throughout.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (13)
1. A display substrate, the display substrate comprising:
the first liquid crystal layer comprises cholesteric liquid crystal molecules, and the helical direction of the cholesteric liquid crystal molecules is a first helical direction;
the optical film layer is positioned at one side of the first liquid crystal layer, which is away from the display surface of the display substrate;
the display substrate is configured to: when an electric field is not applied to the first liquid crystal layer, the circularly polarized light with the first rotation direction in the ambient light entering the first liquid crystal layer is reflected and emitted by the first liquid crystal layer, the circularly polarized light with the second rotation direction in the ambient light enters the optical film layer through the first liquid crystal layer, the circularly polarized light with the second rotation direction entering the optical film layer is converted into the circularly polarized light with the second rotation direction entering the first liquid crystal layer, and the circularly polarized light with the second rotation direction entering the first liquid crystal layer exits through the first liquid crystal layer; when an electric field is applied to the first liquid crystal layer, ambient light incident on the first liquid crystal layer is incident on and absorbed by the optical film layer through the first liquid crystal layer; wherein the first direction of rotation is opposite the second direction of rotation.
2. The display substrate according to claim 1, wherein the optical film layer includes a first phase deviation film, a first sub-optical film layer, a second phase deviation film, a second sub-optical film layer, and a reflective layer stacked in this order in a direction away from the first liquid crystal layer;
the first phase deviation film and the second phase deviation film are both configured to deflect the phase of the passing light by pi/2; the optical axis of the first phase deviation film and the optical axis of the second phase deviation film are parallel to each other; the first sub-optical film layer is configured to pass light from the first phase deviation film when no electric field is applied to the first liquid crystal layer, and to deflect the phase of light from the first phase deviation film by pi/2 when an electric field is applied to the first liquid crystal layer, and to absorb light from the second sub-optical film; the second sub-optical film layer is configured to deflect the phase of the passing light by pi/2 when no electric field is applied to the first liquid crystal layer, and to prevent the polarization direction of the passing light from being changed when an electric field is applied to the first liquid crystal layer.
3. The display substrate of claim 2, wherein the first sub-optical film layer comprises a polarizing film; in a direction from the first liquid crystal layer to the optical film layer, a transmission axis of the polarizing film is deflected by 45 ° in the second rotational direction with respect to an optical axis of the first phase deviation film.
4. The display substrate of claim 2, wherein the second sub-optical film layer comprises a second liquid crystal layer comprising nematic liquid crystal molecules; the alignment of the liquid crystal molecules of the second liquid crystal layer and the optical axis of the first phase deviation film are parallel to each other when no electric field is applied to the second liquid crystal layer.
5. The display substrate according to claim 2, wherein the optical film layer further comprises a first electrode located on a side of the second liquid crystal molecular layer facing the first liquid crystal layer, the reflective layer is made of a conductive material, and the reflective layer comprises a second electrode; one of the first electrode and the second electrode is a pixel electrode, and the other is a common electrode.
6. The display substrate according to claim 2, wherein the optical film layer further comprises a first electrode located on a side of the second liquid crystal molecular layer facing the first liquid crystal layer, and a second electrode located on a side of the second liquid crystal molecular layer facing away from the first liquid crystal layer, and the reflective layer is located on a side of the second electrode facing away from the first liquid crystal layer; the first electrode and the second electrode are made of light-transmitting materials.
7. The display substrate of claim 2, wherein the first direction of rotation is clockwise and the second direction of rotation is counter-clockwise in a direction in which the optical film layer is directed toward the first liquid crystal layer.
8. The display substrate of claim 2, wherein the first direction of rotation is counter-clockwise and the second direction of rotation is clockwise in a direction in which the optical film layer is directed toward the first liquid crystal layer.
9. The display substrate according to claim 1, wherein the cholesteric liquid crystal molecules have a plurality of different pitches, the pitch ranging fromWherein n is o Refractive index for ordinary ray of the cholesteric liquid crystal molecules, n e The cholesteric liquid crystal molecules have an extraordinary refractive index.
10. The display substrate according to claim 9, wherein the first liquid crystal layer comprises nematic liquid crystal molecules and chiral polymerizable monomers, and wherein the concentration of chiral polymerizable monomers in the regions of the first liquid crystal layer having a larger pitch is less than the concentration of chiral polymerizable monomers in the regions having a smaller pitch.
11. The display substrate of claim 1, further comprising a color film layer on a side of the first liquid crystal layer facing away from the optical film layer, the color film layer comprising color filters of at least three different colors.
12. The display substrate of claim 1, wherein the cholesteric liquid crystal molecules have a pitch; the optical film layer comprises a second liquid crystal layer, the display substrate further comprises a color film layer positioned on one side of the second liquid crystal layer facing the first liquid crystal layer, and the color film layer comprises a color filter part with one color.
13. A display device, characterized in that the display device comprises the display substrate according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310912585.3A CN116909059B (en) | 2023-07-24 | 2023-07-24 | Display substrate and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310912585.3A CN116909059B (en) | 2023-07-24 | 2023-07-24 | Display substrate and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116909059A true CN116909059A (en) | 2023-10-20 |
| CN116909059B CN116909059B (en) | 2026-01-23 |
Family
ID=88357909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310912585.3A Active CN116909059B (en) | 2023-07-24 | 2023-07-24 | Display substrate and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116909059B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000171789A (en) * | 1997-12-25 | 2000-06-23 | Toshiba Corp | Display element |
| JP2001154180A (en) * | 1999-11-30 | 2001-06-08 | Sharp Corp | Liquid crystal display |
| CN1760719A (en) * | 2004-10-11 | 2006-04-19 | 三星电子株式会社 | Blooming and manufacture method thereof and plane fluorescent lamp and display device |
| CN104155800A (en) * | 2014-07-11 | 2014-11-19 | 京东方科技集团股份有限公司 | Reflective liquid-crystal display |
| CN104570463A (en) * | 2015-01-22 | 2015-04-29 | 京东方科技集团股份有限公司 | Display device with mirror function and manufacturing method thereof |
| CN107145010A (en) * | 2017-07-04 | 2017-09-08 | 京东方科技集团股份有限公司 | A kind of preparation method of display panel, display device and display panel |
| CN109856830A (en) * | 2019-01-03 | 2019-06-07 | 京东方科技集团股份有限公司 | Reflective display panel and its manufacturing method, driving method and display device |
-
2023
- 2023-07-24 CN CN202310912585.3A patent/CN116909059B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000171789A (en) * | 1997-12-25 | 2000-06-23 | Toshiba Corp | Display element |
| JP2001154180A (en) * | 1999-11-30 | 2001-06-08 | Sharp Corp | Liquid crystal display |
| CN1760719A (en) * | 2004-10-11 | 2006-04-19 | 三星电子株式会社 | Blooming and manufacture method thereof and plane fluorescent lamp and display device |
| CN104155800A (en) * | 2014-07-11 | 2014-11-19 | 京东方科技集团股份有限公司 | Reflective liquid-crystal display |
| CN104570463A (en) * | 2015-01-22 | 2015-04-29 | 京东方科技集团股份有限公司 | Display device with mirror function and manufacturing method thereof |
| CN107145010A (en) * | 2017-07-04 | 2017-09-08 | 京东方科技集团股份有限公司 | A kind of preparation method of display panel, display device and display panel |
| CN109856830A (en) * | 2019-01-03 | 2019-06-07 | 京东方科技集团股份有限公司 | Reflective display panel and its manufacturing method, driving method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116909059B (en) | 2026-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102736306B (en) | Display device and electronic equipment | |
| JP3612024B2 (en) | Liquid crystal display | |
| JP3852342B2 (en) | Reflector, reflector manufacturing method, liquid crystal device, electronic device | |
| JP3058620B2 (en) | Liquid crystal display | |
| CN106054460A (en) | Display and electronic unit | |
| US20140176859A1 (en) | Wide-color gamut film, display apparatus with the wide-color gamut film, and method for manufacturing the film | |
| JP5275591B2 (en) | Liquid crystal display | |
| KR20040031858A (en) | Liquid crystal display | |
| CN115274812B (en) | Display panel, preparation method thereof and display device | |
| US7510748B2 (en) | Broadband reflection type brightness enhancement polarizer and liquid crystal display having the same | |
| KR100766179B1 (en) | Integrated broadband reflective high brightness polarizer with diffusion pattern, manufacturing method thereof and liquid crystal display device having same | |
| KR20010066252A (en) | reflection type and transflection type liquid crystal display device with retardation film | |
| KR100824115B1 (en) | Reflective type high brightness polarizer and liquid crystal display device having same | |
| CN116909059B (en) | Display substrate and display device | |
| KR20040052451A (en) | Substrate with cholesteric layer and display having the substrate | |
| JPH11109328A (en) | Liquid crystal device and method of manufacturing the same | |
| KR20020044094A (en) | Polarized light reflection element, liquid crystal display element having the same, and method for manufacturing the polarized light reflection element | |
| KR100699657B1 (en) | Broadband reflective high brightness polarizer and liquid crystal display device having same | |
| CN117471749A (en) | Electronically controlled optical screen | |
| JP3340073B2 (en) | Color liquid crystal display | |
| JP4058980B2 (en) | Liquid crystal display device and electronic device | |
| KR100699625B1 (en) | Integrated broadband reflective high brightness polarizer with uneven surface and liquid crystal display having same | |
| CN113820779B (en) | Polarizer, preparation method thereof, and display panel | |
| KR100644013B1 (en) | Integrated broadband reflective high brightness polarizer having a prism pattern, a method of manufacturing the same and a liquid crystal display device having the same | |
| CN118818854A (en) | Display device |
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 |