CN108919554B - Reflective display substrate, manufacturing method thereof and display panel - Google Patents
Reflective display substrate, manufacturing method thereof and display panel Download PDFInfo
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- CN108919554B CN108919554B CN201810837243.9A CN201810837243A CN108919554B CN 108919554 B CN108919554 B CN 108919554B CN 201810837243 A CN201810837243 A CN 201810837243A CN 108919554 B CN108919554 B CN 108919554B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
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- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The application discloses a reflective display substrate, a manufacturing method thereof and a display panel, and belongs to the technical field of display. The reflective display substrate includes: the light-emitting diode comprises a substrate, and a reflecting layer, a photoluminescent layer and a light-adjusting layer which are sequentially arranged on the substrate along a direction far away from the substrate, wherein the light-adjusting layer is divided into a plurality of areas, and the light transmittance of each area can be adjusted; the photoluminescent layer is used for emitting exciting light under the excitation of light rays emitted into the photoluminescent layer; the reflecting layer is used for reflecting the exciting light emitted to the reflecting layer by the light-emitting structure. The display panel and the display method solve the problems that the brightness of the image displayed by the reflective display panel is low and the display effect is poor, and improve the display effect of the reflective display panel. The application is used for displaying images.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a reflective display substrate, a manufacturing method thereof, and a display panel.
Background
With the development of display technology, display panels are widely used in the production and life of people, and among them, reflective display panels are more and more concerned by people due to the advantages of no need of backlight, low power consumption, and the like.
In the related art, the reflective display panel includes a light modulation layer, a color filter, and a reflective sheet, and the light modulation layer may be divided into a plurality of regions with adjustable light transmittance. The ambient light can pass through the area with high light transmittance in the light modulation layer and the part corresponding to the area in the color filter to be emitted to the reflector plate, and then is reflected to the eyes of a user by the reflector plate so as to realize the display of the image.
The color filter absorbs part of the light emitted to the color filter, so that the brightness of the light emitted to the reflector after passing through the color filter is low, and the brightness of the light reflected to the eyes of a user by the reflector is also low, so that the brightness of an image displayed by the reflective display panel is low, and the display effect is poor.
Disclosure of Invention
The application provides a reflective display substrate, a manufacturing method thereof and a display panel, which can solve the problems of low brightness and poor display effect of an image displayed by the reflective display panel. The technical scheme is as follows:
in one aspect, a reflective display substrate is provided, the reflective display substrate comprising: a substrate base plate, and a reflecting layer, a photoluminescence layer and a light modulation layer which are arranged on the substrate base plate in sequence along the direction far away from the substrate base plate,
the dimming layer is divided into a plurality of areas, and the light transmittance of each area can be adjusted;
the photoluminescent layer is used for emitting exciting light under the excitation of light rays emitted into the photoluminescent layer;
the reflecting layer is used for reflecting the exciting light emitted to the reflecting layer by the light-emitting structure.
Optionally, the reflective display substrate further includes: the brightening layer is arranged on one side, far away from the substrate base plate, of the reflecting layer and used for enhancing the brightness of light rays entering the brightening layer and emitting the light rays with the enhanced brightness.
Optionally, the brightness enhancing layer is disposed between the photoluminescent layer and the light modulating layer, or the brightness enhancing layer is disposed between the photoluminescent layer and the reflective layer.
Optionally, the brightness enhancing layer is made of a photonic crystal material, and a plurality of uniformly arranged photonic crystal microcavities are present in the brightness enhancing layer.
Optionally, the refractive index of the photonic crystal material is greater than 1.8.
Optionally, the dimming layer includes: a first electrode layer, a two-dimensional material layer and a second electrode layer sequentially arranged on the photoluminescence layer along the direction far away from the substrate,
an electric field can be formed between the first electrode layer and the second electrode layer, and the light transmittance of each region changes along with the change of the electric field.
Optionally, the brightness enhancing layer is disposed between the photoluminescent layer and the light modulating layer, and the reflective display substrate further includes:
a transparent spacer layer disposed between the reflective layer and the photoluminescent layer;
and a planar layer disposed between the brightness enhancing layer and the dimming layer.
In another aspect, a method of manufacturing a reflective display substrate is provided, the method including:
providing a substrate base plate;
forming a reflective layer on the substrate base plate;
forming a photoluminescent layer on the substrate with the reflective layer;
forming a light modulation layer on the substrate with the photoluminescence layer;
the light modulation layer is divided into a plurality of areas, and the light transmittance of each area can be adjusted; the photoluminescent layer is used for emitting exciting light under the excitation of light rays emitted into the photoluminescent layer; the reflecting layer is used for reflecting the exciting light emitted to the reflecting layer by the light-emitting structure.
Optionally, after forming the reflective layer on the substrate base plate, the method further includes:
and forming a brightness enhancement layer on the substrate with the reflecting layer, wherein the brightness enhancement layer is used for enhancing the brightness of the light rays entering the brightness enhancement layer and emitting the light rays with enhanced brightness.
In another aspect, a display panel is provided, where the display panel includes a reflective display substrate and a cover plate that are disposed opposite to each other, and the reflective display substrate is the reflective display substrate described above.
The beneficial effect that technical scheme that this application provided brought includes at least:
the application provides a reflective display substrate and a manufacturing method thereof, and a display panel, wherein when the display panel where the reflective display substrate is located displays images, ambient light can penetrate through a region with a large light transmittance in a light modulation layer and a brightening layer to penetrate into a photoluminescent layer so as to excite the photoluminescent layer to emit exciting light, the exciting light can be emitted to a reflecting layer and reflected, and then the exciting light is emitted into eyes of a user through the photoluminescent layer, the brightening layer and the light modulation layer again so as to realize image display of the display panel. Because the reflective display substrate does not comprise the optical filter, the loss of the ambient light emitted into the reflective display substrate is less, and more light can be used for exciting the photoluminescent layer to emit light, so that the brightness of the exciting light emitted by the photoluminescent layer can be higher; and the light entering the eyes of the user is brightened by the brightening layer, so that the brightness of the light entering the eyes of the user is higher, the brightness of the image displayed by the reflective display panel is higher, and the display effect is better.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a reflective display substrate according to an embodiment of the present invention;
fig. 2 is a schematic partial structure diagram of a light emitting structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of another reflective display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a two-dimensional material molecule provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dimming layer according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for fabricating a reflective display substrate according to an embodiment of the present invention;
FIG. 7 is a flow chart of another method for fabricating a reflective display substrate according to an embodiment of the present invention;
FIG. 8 is a schematic view of a portion of a reflective display substrate according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a portion of another reflective display substrate according to an embodiment of the present invention;
FIG. 10 is a schematic view of a portion of a reflective display substrate according to an embodiment of the present invention;
fig. 11 is a schematic partial structure view of another reflective display substrate according to an embodiment of the invention.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.
With the development of display technology, reflective display panels are widely used. The principle of the reflective display panel to realize color display is as follows: the ambient light passes through the color filter in the reflective display panel and is emitted out, so as to realize the color display of the reflective display panel. The color filter absorbs more ambient light, so that the brightness of light emitted from the reflective display panel is lower, and the brightness of an image displayed by the reflective display panel is lower, and the display effect is poorer. The display panel on which the reflective display substrate provided by the embodiment of the invention is arranged can emit light with higher brightness, so that the display effect of the reflective display panel is improved.
Fig. 1 is a schematic structural diagram of a reflective display substrate according to an embodiment of the invention. As shown in fig. 1, the reflective display substrate 10 may include: a substrate 101, and a reflective layer 102, a photoluminescent layer 103, and a light-adjusting layer 104 sequentially disposed on the substrate 101 in a direction away from the substrate 101.
The light modulation layer 104 may be divided into a plurality of regions (not shown in fig. 1), and the light transmittance of each region can be adjusted; the photoluminescent layer 103 can be used to emit excitation light under excitation of light incident on it; the reflective layer 102 may be used to reflect excitation light emitted by the photoluminescent layer 103 towards the reflective layer 102.
In summary, when the display panel on which the reflective display substrate according to the embodiment of the invention is disposed displays an image, ambient light may penetrate through a region with a relatively large light transmittance in the dimming layer and enter the photoluminescent layer to excite the photoluminescent layer to emit excitation light, and the excitation light may be emitted to the reflective layer and reflected, and then enter eyes of a user through the photoluminescent layer and the dimming layer again, so as to implement image display of the display panel. Because the reflective display substrate does not comprise the optical filter, the loss of the ambient light entering the reflective display substrate is less, and more light can be used for exciting the photoluminescent layer to emit light, so that the brightness of the exciting light emitted by the photoluminescent layer can be higher, the brightness of the light entering the eyes of a user is higher, the brightness of an image displayed by the reflective display panel is higher, and the display effect is better.
Optionally, the material of the reflective layer is a metal material with high reflectivity, such as silver or aluminum; the reflective layer may have a thickness greater than 10 nanometers, such as 100 nanometers.
Alternatively, the photoluminescent layer may be divided into a plurality of pixel regions, each of the pixel regions may include three sub-pixels, such as a red sub-pixel, a green sub-pixel, and a blue sub-pixel, where the red sub-pixel may emit red light under excitation of specific light incident thereto, the green sub-pixel may emit green light under excitation of the specific light incident thereto, and the blue sub-pixel may emit blue light under excitation of the specific light incident thereto, where the specific light may be ultraviolet light. Fig. 2 illustrates one pixel region in the photoluminescent layer 103, which may include a red sub-pixel 103a, a green sub-pixel 103b, and a blue sub-pixel 103c, as shown in fig. 2.
The sub-pixels in the photoluminescent layer can correspond to the plurality of regions in the dimming layer one by one, and the amount of light entering the sub-pixels corresponding to the regions can be adjusted by adjusting the light transmittance of each region in the dimming layer, so as to adjust the amount of excitation light emitted by the sub-pixels. Therefore, each pixel region can emit red light, green light and blue light with different proportions by adjusting the light transmittance of each region in the light modulation layer, and the red light, the green light and the blue light with different proportions can be mixed to obtain light with different colors, namely the pixel region can emit light with different colors, so that color image display of a display panel on which the reflective display substrate is arranged is realized.
For example, the material of the photoluminescent layer may be a quantum dot material, an organic small molecule fluorescent material, or an organic small molecule phosphorescent material, and the photoluminescent layer may be prepared by spin coating or evaporation. If the material of the light emitting layer is quantum dot material, the material of the red sub-pixel may be red quantum dot, the material of the green sub-pixel may be green quantum dot, and the material of the blue sub-pixel may be blue quantum dot.
Fig. 3 is a schematic structural diagram of another reflective display substrate according to an embodiment of the invention. As shown in fig. 3, on the basis of fig. 1, the reflective display substrate 10 may further include: a brightness enhancing layer 107, where the brightness enhancing layer 107 may be disposed on the side of the reflective layer 102 away from the substrate 101, and the brightness enhancing layer 107 may be used to enhance the brightness of light entering the brightness enhancing layer 107 and to emit light with enhanced brightness.
By way of example, the brightness enhancing layer 107 may be disposed between the photoluminescent layer 103 and the dimming layer 104, such an arrangement being illustrated in FIG. 3; alternatively, the brightness enhancing layer may be disposed between the reflective layer and the photoluminescent layer, which is not limited in this embodiment of the present invention.
Alternatively, the brightness enhancing layer may be made of a photonic crystal material. With continued reference to FIG. 2, a plurality of uniformly arranged photonic crystal microcavities W may be present in the brightness enhancing layer 107. It should be noted that the photonic crystal micro-cavities can improve the brightness of the light entering the brightness enhancement layer, guide the light to be emitted more intensively, and the uniform arrangement of the multiple photonic crystal micro-cavities can make the light emitted from the brightness enhancement layer more uniform. Optionally, the refractive index of the photonic crystal material may be greater than 1.8, so that the quality factor of the photonic crystal microcavity is greater, and further, the light entering the brightness enhancement layer is more concentrated, and the brightness of the light exiting the brightness enhancement layer is higher.
It should be noted that the photonic crystal microcavities with different apertures can brighten the light with a specific wavelength range and emit the brightened light, for example, the aperture of the photonic crystal microcavity brightening red light is different from the aperture of the photonic crystal microcavity brightening green light. The exciting light that photoluminescence layer sent need pass through the brightening layer and emit reflective display substrate, in order to increase the luminance of the exciting light of every colour, can set up the aperture of photonic crystal microcavity in the brightening layer according to the colour of every regional exciting light that sends in the photoluminescence layer to make this brightening layer with this regional just right photonic crystal microcavity can the brightening this exciting light.
Optionally, the photonic crystal material in the embodiment of the present invention may be a two-dimensional photonic crystal material or a three-dimensional photonic crystal material, the photonic crystal microcavity may be prepared by a nanoimprint method, and the aperture range of the photonic crystal microcavity may be 100 nm to 500 nm.
With continued reference to fig. 3, the reflective display substrate 10 may further include: a transparent spacer layer 105 disposed between the reflective layer 102 and the photoluminescent layer 103, and a planarization layer 106 disposed between the brightness enhancing layer 107 and the dimming layer 104. The dimming layer 104 may include: a first electrode layer 1041, a two-dimensional material layer 1042, and a second electrode layer 1043 disposed on the brightness enhancing layer 107 in that order in a direction away from the base substrate 101. An electric field can be formed between the first electrode layer 1041 and the second electrode layer 1043, and the molecules in the two-dimensional material layer 1042 can move in two dimensions with the change of the electric field, so that the light transmittance of each region in the light modulation layer 104 can be changed with the change of the electric field.
Illustratively, the transparent spacer layer and the planarization layer are used for protecting the light emitting structure, and the material of the planarization layer is also a transparent material. The transparent spacing layer and the flat layer can be made of silicon dioxide or resin materials, and the thickness range of the transparent spacing layer and the thickness range of the flat layer can be 10-100 nanometers. The first electrode layer and the second electrode layer may be made of a transparent conductive material, for example, the transparent conductive material may be Indium Tin Oxide (ITO), the two-dimensional material layer may be graphene oxide, and the thickness of the two-dimensional material layer may be 2 micrometers to 5 micrometers. As shown in fig. 4, the graphene oxide molecule Z may be a sheet structure, and may be deflected under the action of an electric field, and the sheet structure may be parallel to the electric field direction x.
It should be noted that when a voltage difference exists between the first electrode layer 1041 and the second electrode layer 1043, an electric field may be formed between the first electrode layer 1041 and the second electrode layer 1043, and the graphene oxide molecules Z in the two-dimensional material layer 1042 may deflect under the action of the electric field (as shown in fig. 5, the molecules in the two-dimensional material layer all deflect to a state parallel to the electric field direction y). At this time, the two-dimensional material layer is transparent, light can transmit through the light modulation layer 104, and the display panel on which the reflective display substrate is located can display images. When the voltage difference between the first electrode layer and the second electrode layer is zero, that is, no electric field is formed between the first electrode layer and the second electrode layer, the graphene oxide molecules in the two-dimensional material layer are randomly and randomly distributed. At this time, the two-dimensional material layer is fog-like, light cannot penetrate through the two-dimensional material layer, and the display panel where the reflective display substrate is located displays in a dark state.
It should be noted that fig. 5 shows only one region of the light modulation layer 104, and only illustrates the case where the molecules in the two-dimensional material layer are all deflected to be parallel to the electric field direction y; optionally, the voltage difference between the first electrode layer and the second electrode layer may also be adjusted, so that only a part of molecules in the two-dimensional material layer are deflected to be parallel to the electric field direction y, and then the light may partially penetrate through the two-dimensional material layer, thereby adjusting the light emitted from each region of the reflective display substrate. In addition, in the embodiment of the present invention, only the material of the two-dimensional material layer in the light modulation layer is graphene oxide, optionally, the light modulation layer may also be a liquid crystal cell, and the material of the two-dimensional material layer may also be liquid crystal, which is not limited in the embodiment of the present invention.
When the display panel on which the reflective display substrate is arranged displays an image, the light transmittance of each region in the light modulation layer can be adjusted according to the image, so that different amounts of ambient light can penetrate through each region, then the penetrated ambient light can pass through the flat layer and the brightness enhancement layer and further irradiate to the photoluminescent layer, so that different amounts of exciting light can be emitted by each sub-pixel of the photoluminescent layer, and the exciting light emitted by the sub-pixels in each pixel region can be mixed into light with different colors; the light emitted from each pixel region can pass through the transparent spacing layer to be emitted to the reflecting layer and reflected, and then passes through the transparent spacing layer, the photoluminescent layer, the brightness enhancement layer and the dimming layer again to be emitted to the eyes of a user, so that the reflective display panel can display color images.
In summary, the reflective display substrate provided in the embodiments of the invention does not include a filter, so that the ambient light incident into the reflective display substrate is less lost, and more light can be used to excite the photoluminescent layer to emit light, so that the brightness of the excitation light emitted by the photoluminescent layer can be higher; and the light entering the eyes of the user is brightened by the brightening layer, so that the brightness of the light entering the eyes of the user is higher, the brightness of an image displayed by the display panel on which the reflective display substrate is arranged can be higher, and the display effect is better.
Fig. 6 is a flowchart of a method for manufacturing a reflective display substrate according to an embodiment of the invention. The method may be used to manufacture the reflective display substrate shown in fig. 1, and as shown in fig. 6, the method may include:
Step 603 is to form a photoluminescent layer on the substrate with the reflective layer formed thereon.
The light modulation layer is divided into a plurality of areas, the light transmittance of each area is adjusted, the photoluminescent layer is used for emitting exciting light under the excitation of light rays entering the photoluminescent layer, and the reflecting layer is used for reflecting the exciting light of the reflecting layer assumed by the light emitting structure.
In summary, when the display panel on which the reflective display substrate manufactured by the method provided in the embodiments of the present invention is located displays an image, ambient light may penetrate through a region with a relatively high light transmittance in the light modulation layer and enter the photoluminescent layer to excite the photoluminescent layer to emit excitation light, and then the excitation light may irradiate and reflect on the reflective layer, and further pass through the photoluminescent layer and the light modulation layer again and enter eyes of a user, so as to implement image display of the display panel. Because the reflective display substrate does not comprise the optical filter, the loss of the ambient light entering the reflective display substrate is less, and more light can be used for exciting the photoluminescent layer to emit light, so that the brightness of the exciting light emitted by the photoluminescent layer can be higher, the brightness of the light entering the eyes of a user is higher, the brightness of an image displayed by the reflective display panel is higher, and the display effect is better.
FIG. 7 is a flowchart illustrating another method for fabricating a display substrate according to an embodiment of the present invention. The method may be used to manufacture the reflective display substrate shown in fig. 3, and as shown in fig. 7, the method may include:
For example, a metal (such as silver or aluminum) with high reflectivity may be vapor-deposited on the substrate base 101 to form the reflective layer 102, so as to obtain the structure shown in fig. 8. The reflective layer may have a thickness greater than 10 nanometers, such as 100 nanometers.
Illustratively, a transparent spacer layer 105 may be formed on the base substrate 101 having the reflective layer 102 formed thereon as shown in fig. 8 to obtain the structure shown in fig. 9. The material of the transparent spacer layer 105 may be silicon dioxide or a resin material, and the thickness of the transparent spacer layer 105 may range from 10 nm to 100 nm.
Illustratively, the photoluminescent layer 103 may be formed by spin coating or evaporation on the structure shown in fig. 9 using a photoluminescent material to obtain the structure shown in fig. 10. The photoluminescence material can be a quantum dot material, an organic micromolecule fluorescent material or an organic micromolecule phosphorescent material.
Step 705 is to form a brightness enhancing layer by nanoimprinting on the substrate with the photoluminescent layer formed thereon.
By way of example, the brightness enhancing layer 107 may be formed by nanoimprinting on the substrate 101 with the photoluminescent layer 103 formed thereon as shown in FIG. 10, and the brightness enhancing layer 107 may include a plurality of photonic crystal microcavities (not shown in FIG. 10) arranged uniformly to give the structure shown in FIG. 11. The brightness enhancement layer is used for enhancing the brightness of light rays entering the brightness enhancement layer and emitting the light rays with enhanced brightness, and the aperture range of the photonic crystal microcavity can be 100-500 nanometers.
Illustratively, the planarization layer 106, the first electrode layer 1041, the two-dimensional material layer 1042, and the second electrode layer 1043 may be sequentially formed on the substrate 101 with the brightness enhancing layer 107 shown in FIG. 11 to obtain the reflective display substrate 10 shown in FIG. 3. The material of the planarization layer 106 can be silicon dioxide or a resin material, the thickness of the planarization layer 106 can range from 10 nm to 100 nm, and the first electrode layer 1041, the two-dimensional material layer 1042 and the second electrode layer 1043 together form the light modulation layer 104.
The light modulation layer 104 may be divided into a plurality of regions whose light transmittance can be adjusted, an electric field can be formed between the first electrode layer 1041 and the second electrode layer 1043, and the light transmittance of each region of the light modulation layer 104 can be changed by changing the electric field. The first electrode layer 1041 and the second electrode layer 1043 may be made of a transparent conductive material, such as indium tin oxide, the two-dimensional material layer 1042 may be made of graphene oxide, and the thickness of the two-dimensional material layer may be 2 micrometers to 5 micrometers.
In summary, when the display panel on which the reflective display substrate manufactured by the method provided in the embodiments of the present invention is located displays an image, ambient light may pass through the region with the relatively high light transmittance in the dimming layer and the brightness enhancement layer and enter the photoluminescent layer to excite the photoluminescent layer to emit excitation light, and then the excitation light may emit to the reflective layer and be reflected, and then enter the eyes of a user through the photoluminescent layer, the brightness enhancement layer and the dimming layer again, so as to implement image display of the display panel. Because the reflective display substrate does not comprise the optical filter, the loss of the ambient light emitted into the reflective display substrate is less, and more light can be used for exciting the photoluminescent layer to emit light, so that the brightness of the exciting light emitted by the photoluminescent layer can be higher; and the light entering the eyes of the user is brightened by the brightening layer, so that the brightness of the light entering the eyes of the user is higher, the brightness of the image displayed by the reflective display panel is higher, and the display effect is better.
Embodiments of the present invention further provide a display panel, where the display panel includes a reflective display substrate and a cover plate, which are oppositely disposed, and the reflective display substrate may be as shown in fig. 1 or fig. 3.
The embodiment of the invention also provides a display device which can comprise the display panel. In specific implementation, the display device provided in the embodiment of the present invention may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
It should be noted that, the method embodiments provided in the embodiments of the present invention can be mutually referred to corresponding embodiments of the reflective display substrate, and the embodiments of the present invention do not limit this. The sequence of the steps of the method embodiments provided in the embodiments of the present invention can be appropriately adjusted, and the steps can be correspondingly increased or decreased according to the situation, and any method that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall be covered by the protection scope of the present application, and therefore, the details are not repeated.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (3)
1. A reflective display substrate, comprising: the device comprises a substrate, and a reflecting layer, a transparent spacing layer, a photoluminescent layer, a brightness enhancement layer, a flat layer and a dimming layer which are sequentially arranged on the substrate along the direction far away from the substrate;
the light modulation layer includes: the first electrode layer, the two-dimensional material layer and the second electrode layer are sequentially arranged on the photoluminescence layer along the direction far away from the substrate base plate, and the two-dimensional material layer is made of graphene oxide; an electric field can be formed between the first electrode layer and the second electrode layer, the dimming layer is divided into a plurality of regions, and the light transmittance of each region is changed along with the change of the electric field;
the photoluminescent layer is used for emitting exciting light under the excitation of light rays emitted into the photoluminescent layer;
the reflecting layer is used for reflecting the exciting light emitted by the light-emitting structure to the reflecting layer;
the brightness enhancement layer is used for enhancing the brightness of light rays entering the brightness enhancement layer and emitting the light rays with enhanced brightness; the brightness enhancement layer is made of a photonic crystal material with the refractive index larger than 1.8, and a plurality of photonic crystal micro-cavities which are uniformly arranged exist in the brightness enhancement layer; the photonic crystal microcavity is prepared by a nano-imprinting method, and the aperture range of the photonic crystal microcavity is 100-500 nm;
the transparent spacing layer and the flat layer are both made of silicon dioxide or resin materials, and the thickness range of the transparent spacing layer and the thickness range of the flat layer are both 10-100 nanometers.
2. A method of manufacturing a reflective display substrate, the method comprising:
providing a substrate base plate;
forming a reflective layer on the substrate base plate;
forming a transparent spacing layer on the substrate with the reflecting layer;
forming a photoluminescent layer on the substrate on which the reflective layer and the transparent spacer layer are formed;
forming a brightening layer on the substrate with the photoluminescent layer by adopting a nano-imprinting mode; the brightness enhancement layer is made of a photonic crystal material with the refractive index larger than 1.8, a plurality of photonic crystal micro-cavities which are uniformly arranged exist in the brightness enhancement layer, and the aperture range of the photonic crystal micro-cavities is 100-500 nanometers;
sequentially forming a flat layer, a first electrode layer, a two-dimensional material layer and a second electrode layer on the substrate with the brightness enhancing layer, wherein the first electrode layer, the two-dimensional material layer and the second electrode layer form a brightness adjusting layer; the transparent spacing layer and the flat layer are both made of silicon dioxide or resin materials, and the thickness range of the transparent spacing layer and the thickness range of the flat layer are both 10-100 nanometers; the two-dimensional material layer is made of graphene oxide;
an electric field can be formed between the first electrode layer and the second electrode layer, the dimming layer is divided into a plurality of regions, and the light transmittance of each region changes along with the change of the electric field; the photoluminescent layer is used for emitting exciting light under the excitation of light rays emitted into the photoluminescent layer; the reflecting layer is used for reflecting the exciting light emitted by the light-emitting structure to the reflecting layer; the brightness enhancement layer is used for enhancing the brightness of light rays entering the brightness enhancement layer and emitting the light rays with enhanced brightness.
3. A display panel, comprising a reflective display substrate and a cover plate, wherein the reflective display substrate and the cover plate are disposed opposite to each other, and the reflective display substrate is the reflective display substrate according to claim 1.
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| US12183224B2 (en) | 2021-06-30 | 2024-12-31 | Beijing Boe Display Technology Co., Ltd. | Display module and method for driving same, and display device |
| CN114967210B (en) * | 2022-02-22 | 2023-11-07 | 京东方科技集团股份有限公司 | Reflection display module and preparation method thereof |
| CN116125701A (en) * | 2023-02-28 | 2023-05-16 | 惠科股份有限公司 | Display panel and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627875A (en) * | 2003-12-10 | 2005-06-15 | 株式会社丰田自动织机 | Electroluminescence device |
| CN2814453Y (en) * | 2005-08-09 | 2006-09-06 | 比亚迪股份有限公司 | Reflective colour liquid crystal display device |
| CN201540424U (en) * | 2009-12-07 | 2010-08-04 | 江西合力泰微电子有限公司 | Liquid crystal display screen with brightening film and reflection sheet |
| CN103091756A (en) * | 2013-02-05 | 2013-05-08 | 北京京东方光电科技有限公司 | Photonic crystal, color film substrate, display panel and display device |
| CN106773257A (en) * | 2017-01-03 | 2017-05-31 | 京东方科技集团股份有限公司 | Reflective display panel and its manufacture method, display device |
| CN107123665A (en) * | 2017-05-11 | 2017-09-01 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof, display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108231849B (en) * | 2018-01-03 | 2020-06-30 | 京东方科技集团股份有限公司 | Display device, apparatus and display control method |
-
2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627875A (en) * | 2003-12-10 | 2005-06-15 | 株式会社丰田自动织机 | Electroluminescence device |
| CN2814453Y (en) * | 2005-08-09 | 2006-09-06 | 比亚迪股份有限公司 | Reflective colour liquid crystal display device |
| CN201540424U (en) * | 2009-12-07 | 2010-08-04 | 江西合力泰微电子有限公司 | Liquid crystal display screen with brightening film and reflection sheet |
| CN103091756A (en) * | 2013-02-05 | 2013-05-08 | 北京京东方光电科技有限公司 | Photonic crystal, color film substrate, display panel and display device |
| CN106773257A (en) * | 2017-01-03 | 2017-05-31 | 京东方科技集团股份有限公司 | Reflective display panel and its manufacture method, display device |
| CN107123665A (en) * | 2017-05-11 | 2017-09-01 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof, display device |
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