CN112151571B - Color conversion assembly, display panel and manufacturing method of color conversion assembly - Google Patents
Color conversion assembly, display panel and manufacturing method of color conversion assembly Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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Abstract
The embodiment of the invention provides a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly, wherein the color conversion assembly comprises: a substrate; the scattering layer is arranged on the substrate; the light collimation layer is arranged on one side of the scattering layer, which is far away from the substrate, and comprises a plurality of light collimation units; the color conversion film comprises a light blocking layer, a plurality of channels penetrating through the light blocking layer and color conversion units distributed in at least partial channels; wherein, the light collimation unit is arranged corresponding to the color conversion unit. The invention not only can limit the emergent light of the color conversion unit within a certain angle through the collimation layer to prevent visual angle color cast, but also can ensure that the emergent light of the substrate has a larger visual angle through the scattering layer, thereby improving the display effect.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly.
Background
Flat panel Display devices such as Liquid Crystal Display (LCD) devices, organic Light Emitting Diode (OLED) devices, and Display devices using Light Emitting Diode (LED) devices have advantages such as high image quality, power saving, thin body, and wide application range, and are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and are becoming the mainstream of Display devices.
The display device may implement a display supporting color patterns through a variety of colorization schemes. In some embodiments, colorization is achieved by adding a color film on the light emitting substrate. However, in the color film in the prior art, a problem of color shift of viewing angle due to light mixing between the light emitting units is usually generated.
Disclosure of Invention
The embodiment of the invention provides a color conversion assembly, a display panel and a manufacturing method of the color conversion assembly, and aims to solve the problem of color cast of a visual angle.
An embodiment of the present invention provides a color conversion module, including: a substrate; the scattering layer is arranged on the substrate; the light collimation layer is arranged on one side, far away from the substrate, of the scattering layer and comprises a plurality of light collimation units; the color conversion film comprises a light blocking layer, a plurality of channels penetrating through the light blocking layer and color conversion units distributed in at least part of the channels; wherein at least part of the light collimating unit is arranged corresponding to the color conversion unit.
According to one aspect of the invention, the light collimating unit comprises more than two barrier walls extending along the thickness direction of the color conversion assembly, a light emitting space formed between adjacent barrier walls and an opening communicated with the light emitting space, and light transmitted through the color conversion unit is emitted through the opening from the light emitting space.
According to one aspect of the invention, the light-emitting space is formed by enclosing more than two barrier walls, and one or more light-emitting spaces are formed by enclosing more than two barrier walls corresponding to the color conversion units.
According to one aspect of the invention, the orthographic projection of the more than two barrier walls on the substrate is in a stripe shape, and the more than two barrier walls comprise more than two first barrier walls which are distributed at intervals and a second barrier wall which surrounds the periphery of the more than two first barrier walls;
or the orthographic projections of more than two barrier walls on the substrate are in a grid shape, the more than two barrier walls comprise first barrier walls extending along a first direction and second barrier walls extending along a second direction, the more than two first barrier walls are distributed at intervals, the more than two second barrier walls are distributed at intervals, and the first direction, the second direction and the thickness direction are intersected in pairs;
or the orthographic projections of the multiple barrier walls on the substrate are enclosed to form a honeycomb shape;
or, the two or more barrier walls are a plurality of mutually independent column-shaped bodies, and the orthographic projections of the two or more barrier walls on the substrate are circular or polygonal.
According to an aspect of the present invention, the barrier ribs have an extended thickness of 0.5 μm to 5 μm;
and/or the minimum distance between two adjacent barrier walls is 0.3-10 mu m.
According to one aspect of the invention, the barrier wall is made of light absorbing material or light reflecting material;
or the outer surface of the barrier wall is coated with a light absorption film or a light reflection film;
or, scattering particles are contained in the barrier walls;
or the light-emitting space is filled with a first material, the barrier wall is made of a second material, and the refractive index of the first material is greater than that of the second material.
According to one aspect of the invention, scattering particles are provided within the scattering layer;
and/or the scattering layer comprises a plurality of scattering structures arranged convexly from the base towards the light collimating structure, preferably the scattering structures have a cross-section of any one of an arc, a saw tooth, a polygon and combinations thereof.
According to one aspect of the invention, the color filter further comprises a Bragg reflection layer arranged between the scattering layer and the color conversion film;
preferably, the reflective layer is arranged between the scattering layer and the light collimating layer.
In another aspect, an embodiment of the present invention further provides a display panel, including:
the driving back plate is provided with a plurality of light sources;
the color conversion assembly and the driving back plate are correspondingly arranged, so that the plurality of channels and the plurality of light sources are correspondingly arranged respectively.
In another aspect, an embodiment of the present invention further provides a method for manufacturing a color conversion module, including:
providing a substrate, and forming a scattering layer on the substrate;
forming a first flattening layer on the scattering layer, and forming a light collimating layer on the first flattening layer, the light collimating layer including a plurality of light collimating units;
continuously forming a second flattening layer on the first flattening layer, wherein the thickness of the second flattening layer is greater than or equal to the extending length of the light collimation unit along the thickness direction;
and forming a color conversion film on the second flattening layer, wherein the color conversion film comprises a light blocking layer, a plurality of channels penetrating through the light blocking layer and color conversion units distributed in at least part of the channels.
The color conversion assembly comprises a substrate, a scattering layer, a light collimation layer and a color conversion film, so that light transmitted by the color conversion film sequentially passes through the light collimation layer and the scattering layer and finally is emitted to the substrate. The emergent light passing through the color conversion unit has the problem of easy light mixing due to overlarge emergent angle. However, when the emergent light passing through the color conversion unit passes through the collimation layer, the emergent light can be limited within a certain angle under the action of the collimation structure, light mixing and visual angle color deviation are prevented, and the emergent spectrum has higher consistency under different visual angles. Furthermore, when emergent light passes through the scattering layer, the angle of the emergent light on the substrate can be increased, and therefore the visual angle is increased. Therefore, the invention not only can limit the emergent light passing through the color conversion unit within a certain angle through the collimation layer to prevent visual angle color cast, but also can ensure that the emergent light of the substrate has a larger visual angle through the scattering layer, thereby improving the display effect.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
FIG. 1 is a schematic structural diagram of a color conversion assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a scattering layer structure of a color conversion assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of a scattering layer structure of a color conversion assembly according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a collimating layer structure of a color conversion assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a collimating layer structure of a color conversion assembly according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of a collimating layer structure of a color conversion assembly according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a collimating layer structure of a color conversion assembly according to yet another embodiment of the present invention;
FIG. 8 is a schematic diagram of a collimating layer structure of a color conversion assembly according to yet another embodiment of the present invention;
FIG. 9 is a schematic view of a collimating layer structure of a color conversion assembly according to yet another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 11 is a flow chart illustrating a method of manufacturing a color conversion assembly according to an embodiment of the present invention;
fig. 12a to 12j are schematic views illustrating a process flow of forming a color conversion device according to an embodiment of the present invention.
Description of reference numerals:
100. a substrate;
200. a scattering layer; 210. a scattering structure; 220. scattering particles;
300. a light collimating layer; 310. a barrier wall; 311. a first barrier rib; 312. a second barrier rib; 320. a light emitting space;
400. a color conversion film; 410. a barrier layer; 411. a channel; 420. a color conversion unit;
500. a reflective layer;
600. a light source;
700. driving the back plate;
810. a first planarization layer; 820. a second planarization layer; 830. a third monolithic layer.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to orientations or positional relationships and are used merely to facilitate description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must be oriented, constructed, and operated in a particular orientation and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. Specific meanings of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
For better understanding of the present invention, the color conversion assembly, the display panel and the color conversion assembly of the embodiment of the present invention are described in detail below with reference to fig. 1 to 12 j.
Fig. 1 is a color conversion assembly according to an embodiment of the present invention, including: a substrate 100; a scattering layer 200 disposed on the substrate 100; the light collimation layer 300 is arranged on one side of the scattering layer 200 far away from the substrate 100, and the light collimation layer 300 comprises a plurality of light collimation units; a color conversion film 400 including a light blocking layer 410, a plurality of channels 411 passing through the light blocking layer 410, and a color conversion unit 420 at least partially inside the channels 411; wherein at least part of the light collimating unit is arranged corresponding to the color conversion unit 420. Preferably, the light collimating unit is disposed corresponding to the color conversion unit 420.
The color conversion member in the present invention includes a substrate 100, a diffusion layer 200, a light collimating layer 300, and a color conversion film 400, so that light transmitted by the color conversion film 400 passes through the light collimating layer 300 and the diffusion layer 200 in order and finally is directed to the substrate 100. When only the color conversion unit 420 is provided, the exit light passing through the color conversion unit 420 has an excessively large exit angle, resulting in a problem of easy light mixing. However, when the emergent light of the color conversion unit 420 passes through the light collimating layer 300, the emergent light can be limited within a certain angle through the action of the light collimating structure, so that light mixing and color cast of a viewing angle are prevented, and the emergent spectrum has high consistency under different viewing angles. Further, when the emitted light passes through the scattering layer 200, the angle of the emitted light on the substrate 100 can be increased, thereby increasing the viewing angle. Therefore, the invention not only can limit the emergent light of the color conversion unit 420 within a certain angle through the light collimation layer 300 to prevent color cast of visual angle, but also can ensure that the emergent light of the substrate 100 has a larger visual angle through the scattering layer 200, thereby improving the display effect.
The substrate 100 may be disposed in various ways, and the substrate 100 may be a hard cover plate such as glass, or the substrate 100 may be a flexible cover plate.
The scattering layer 200 may be disposed in various ways, for example, as shown in fig. 2, the scattering layer 200 has scattering particles 220 therein. When the emergent light passes through the scattering particles 220, scattering occurs, thereby achieving the purpose of scattering. The scattering particles 220 may be disposed in various ways, for example, the scattering particles 220 are organic polymer microspheres, such as polymethyl methacrylate, polysiloxane, etc.; or the scattering particles 220 are inorganic microspheres, such as silver nanoparticles, silicon dioxide, titanium dioxide microspheres, and the like. The scattering layer 200 may be prepared by ink jet printing, spin coating, or doctor blade coating processes.
Alternatively, referring to fig. 3, in another alternative embodiment, the scattering layer 200 includes a plurality of scattering structures 210 protruding from the substrate 100 toward the light collimating structure. When the outgoing light passes through the scattering structure 210, the outgoing light is reflected by the surfaces of the scattering structure 210, so that the outgoing angle is increased.
The scattering structure 210 may be disposed in various manners, for example, the scattering structure 210 is a lens structure, and the cross section of the scattering structure 210 along the thickness direction is any one of an arc shape, a zigzag shape, a polygon shape, and a combination thereof. It is further preferable that the scattering structures 210 are spherical or hemispherical, and a plurality of scattering structures 210 are distributed on the surface of the substrate 100 in an array manner, so as to ensure uniformity of scattering effect of the scattering structures 210 at various positions on the substrate 100. Such scattering structures 210 may be fabricated using a process such as nanoimprint. In other preferred embodiments, the substrate 100 is made of glass, the scattering structures 210 have irregular shapes, and the scattering structures 210 are made by roughening the glass surface to facilitate the preparation of the scattering layer 200.
There are various ways of disposing the light collimating unit, and in some alternative embodiments, the light collimating unit includes two or more barrier ribs 310 extending along the thickness direction (Z direction in fig. 1) of the color conversion assembly, a light-emitting space 320 formed between adjacent barrier ribs 310, and an opening communicating with the light-emitting space 320, so that the light transmitted through the color conversion unit 420 exits through the opening through the light-emitting space 320.
The thickness direction is the stacking direction of each layer structure in the color conversion assembly, and each layer structure in the color conversion assembly is stacked along the thickness direction.
In these optional embodiments, the emergent light of the color conversion unit 420 passes through the light-emitting space 320, and when the angle of the emergent light of the color conversion unit 420 is too large, the emergent light meeting the requirement of the emergent angle is emitted to the scattering layer 200 from the opening by the barrier rib 310, so as to effectively prevent the color mixing problem caused by the too large angle of the incident light of the scattering layer 200.
The light-emitting space 320 may be disposed in various ways, for example, the light-emitting space 320 is formed by two or more barrier ribs 310 disposed at intervals, and at this time, the light-emitting space 320 further has a notch in a direction perpendicular to the thickness direction of the color conversion assembly.
Preferably, the light-emitting space 320 is formed by enclosing more than two barrier ribs 310, and the opening and the color conversion unit 420 are oppositely arranged. The emergent light of the color conversion unit 420 is emitted from the opening and is not emitted from other positions, so that the emergent light of the light collimation structure is further ensured to have a smaller emergent angle.
The number of the light-emitting spaces 320 is not limited, and one or more light-emitting spaces 320 are formed by the two or more barrier ribs 310 corresponding to the color conversion unit 420. Preferably, the two or more barrier ribs 310 surround the color conversion unit 420 to form a plurality of light emitting spaces 320, which not only can reduce the angle of the light emitted from the light collimating layer 300, but also can ensure that the angles of the light emitted from the light collimating layer 300 corresponding to different positions of the color conversion unit 420 tend to be consistent, thereby ensuring the light emitting effect.
The shape of the barrier ribs 310 is not limited herein, as shown in fig. 4 to 6, the orthographic projection of the two or more barrier ribs 310 on the substrate 100 along the thickness direction is in a stripe shape, the two or more barrier ribs 310 include a first barrier rib 311 and a second barrier rib 312, the two or more first barrier ribs 311 are disposed at intervals, the second barrier rib 312 surrounds the periphery of the two or more first barrier ribs 311, so that the first barrier rib 311 and the second barrier rib 312 surround to form the light emitting space 320. Preferably, the two or more first barrier ribs 311 are distributed at equal intervals, so as to improve the uniformity of the size between the light emitting spaces 320, thereby improving the uniformity of the light emitting angle of the light collimating layer 300.
The extending direction of the first barrier rib 311 and the extending length of the two or more first barrier ribs 311 are not limited herein. For example, the color conversion unit 420 is rectangular, and the first barrier ribs 311 are formed to extend along the length direction or the width direction of the color conversion unit 420. The extending length of the barrier rib 310 refers to the longest distance that the barrier rib 310 extends in a plane perpendicular to the thickness direction.
For example, as shown in fig. 4, the first barrier ribs 311 are formed to extend along the length direction of the color conversion unit 420, and two or more first barrier ribs 311 are disposed at intervals along the width direction of the color conversion unit 420. At this time, there are two second barrier ribs 312, and the two second barrier ribs 312 are respectively disposed at two ends of the two or more first barrier ribs 311 along the length direction of the color conversion unit 420.
Alternatively, as shown in fig. 5, the first barrier ribs 311 are formed to extend in the width direction of the color conversion unit 420, and two or more first barrier ribs 311 are disposed at intervals in the length direction of the color conversion unit 420. At this time, there are two second blocking walls 312, and the two second blocking walls 312 are respectively disposed at two ends of the two or more first blocking walls 311 along the width direction of the color conversion unit 420.
Still alternatively, as shown in fig. 6, the first barrier ribs 311 are formed to extend along a diagonal line of the color conversion unit 420, and two or more first barrier ribs 311 are disposed at intervals. In this case, the number of the second barrier ribs 312 is four, and the four second barrier ribs 312 are respectively disposed on the outer peripheral sides of the two or more first barrier ribs 311.
In other alternative embodiments, as shown in fig. 7, the orthographic projection of the two or more barrier walls 310 on the substrate 100 along the thickness direction is in a grid shape, the two or more barrier walls 310 include first barrier walls 311 formed by extending along the first direction and second barrier walls 312 formed by extending along the second direction, the two or more first barrier walls 311 are distributed at intervals, the two or more second barrier walls 312 are distributed at intervals, and two of the first direction, the second direction and the thickness direction intersect with each other.
More preferably, the two or more first barrier ribs 311 are equally spaced apart, and/or the two or more second barrier ribs 312 are equally spaced apart, so that the uniformity of the size between the light-emitting spaces 320 can be further improved.
In yet other alternative embodiments, as shown in fig. 9, the orthogonal projections of the plurality of barrier walls 310 on the substrate 100 along the thickness direction enclose a honeycomb shape. Alternatively, as shown in fig. 8, the two or more barrier ribs 310 are independent columns, and the orthographic projection of the barrier rib 310 on the substrate 100 in the thickness direction is circular or polygonal. The consistency of the sizes of the light emitting spaces 320 is ensured, and the consistency of the emergent angles of the emergent light of the light collimating layer 300 is improved.
The extended thickness of the barrier ribs 310 may be variously selected, and preferably, the extended thickness of the barrier ribs 310 is 0.5 μm to 5 μm. The barrier rib 310 is prevented from being too thick to affect the light output amount, and the barrier rib 310 is prevented from being too thin to reduce the light collimation effect. The extended thickness of the barrier rib 310 refers to the shortest distance that the barrier rib 310 extends on a plane perpendicular to the thickness direction. Although other options for the extended thickness of the barrier wall 310 are possible.
The size of the light-exiting space 320 can be selected in many ways, and preferably, the minimum distance between two adjacent barrier ribs 310 is 0.3 μm to 10 μm, i.e. the minimum width of the light-exiting space 320 is 0.3 μm to 10 μm. The light-emitting space 320 is prevented from being too small to affect the light-emitting effective amount, and the light-emitting space 320 is prevented from being too large to affect the light collimation effect. Of course, other choices for the size of the light-exiting space 320 are possible.
The material of the barrier ribs 310 can be chosen, and preferably, the barrier ribs 310 are made of a light absorbing material, such as a black light absorbing material. When the emergent light with a certain angle reaches the barrier rib 310, the emergent light with a certain angle is absorbed by the barrier rib 310, so that the emergent light with a certain angle is prevented from being emitted from the opening. Alternatively, the barrier ribs 310 are made of a reflective material, such as a reflective metal. The emergent light with a certain angle can be continuously reflected by the barrier wall 310 in the emergent space to be emergent light meeting the requirement of the emergent angle. Alternatively, the outer surface of the barrier rib 310 is coated with a light absorbing film or a light reflecting film, so as to absorb or reflect light. Of course, other options for the material from which the barrier wall 310 is made are also possible.
In other alternative embodiments, the barrier ribs 310 have scattering particles 220 therein. When light larger than a certain angle is emitted to the scattering particles 220, the light will be scattered, so that the emergent light larger than the certain angle can be continuously scattered by the barrier rib 310 in the emergent space to be emergent light meeting the requirement of the emergent angle.
In some alternative embodiments, the light-exiting space 320 is filled with a first material, the barrier ribs 310 are made of a second material, and the refractive index of the first material is greater than that of the second material. Light propagating upward within a certain angle may be totally reflected upward in the high refractive index material. Light larger than a certain angle is not totally reflected, but is emitted laterally and finally absorbed by the light blocking layer 410 of the color conversion film 400, so that the emitted light maintains certain light collimation.
When the first material is filled in the light-emitting space 320 and the barrier ribs 310 are made of the second material, the distance between the two barrier ribs 310 is greater than the extending thickness of the barrier ribs 310. That is, the size of the light-exiting space 320 is larger than that of the barrier rib 310, so that more light is reflected in the material with high refractive index, and the light-exiting amount is increased.
For example, when the color conversion film 400 is applied to a display panel, the channels 411 on the color conversion film 400 are distributed in an array, and the channels 411 are disposed corresponding to the sub-pixels of the display panel.
When the color conversion film 400 is applied to a display panel, the color conversion units 420 are distributed in at least some of the channels 411 according to a predetermined rule according to the pixel arrangement of the display panel. The color conversion unit 420 may be disposed in various ways, for example, the color conversion unit 420 includes a red conversion unit capable of converting light of the light source 600 into red light and a green conversion unit capable of converting light of the light source 600 into green light. The color conversion unit 420 may include, for example, quantum Dots (QDs) that emit red or green light under excitation by light emitted from the light source 600.
The predetermined rule is a pixel arrangement rule, and the red-green color conversion unit 420 is correspondingly distributed in the channel 411 according to the red-green sub-pixel position in the pixel arrangement rule.
The color conversion member is not limited to this, and for example, the color conversion member further includes a bragg reflective layer 500 disposed between the scattering layer 200 and the color conversion film 400. The bragg reflector 500 can transmit light of a specific color, and reflect light in a predetermined wavelength band back to the color conversion unit 420, thereby improving absorption and conversion rate of the color conversion unit 420 to the light source 600.
For example, when the color conversion assembly is applied to a display panel with a blue light source 600 as the light source 600, the blue light is converted into red light or green light by the color conversion unit 420, and a part of the blue light leaks out due to the limited absorption of the blue light by the color conversion unit 420. The bragg mirror can reflect the blue light back to the color conversion unit 420, and the absorption and conversion rate of the blue light by the color conversion unit 420 are improved.
There are many options for the position of the reflective layer 500, and the reflective layer 500 may be disposed between the scattering layer 200 and the light-collimating layer 300, or the reflective layer 500 may be disposed between the light-collimating layer 300 and the color conversion film 400. Preferably, the reflective layer 500 is disposed between the scattering layer 200 and the light collimating layer 300. In these embodiments, when the emergent light passes through the light collimating layer 300, the light with the emergent angle meeting the requirement of the emergent angle is emitted and enters the reflective layer 500, so that the incident angle and the optical path of the light entering the reflective layer 500 are relatively consistent, thereby improving the reflective effect of the reflective layer 500, improving the filtering effect of the reflective layer 500 on the light emitted by the light source 600, and further avoiding color cast. For example, when the light emitted from the light source 600 is blue, the reflective layer 500 disposed between the scattering layer 200 and the light collimating layer 300 can improve the filtering effect of the reflective layer 500 on the blue light.
Referring to fig. 10, a display panel including the color conversion device according to any of the above embodiments is also provided in a second embodiment of the present invention. Since the display panel of the embodiment of the invention includes the color conversion assembly, the display panel of the embodiment of the invention has the beneficial effects of the color conversion assembly, and details are not repeated herein.
The display panel is not limited to this, and the display panel further includes a driving back panel 700, a plurality of light sources 600 distributed in an array are disposed on the driving back panel 700, and the light sources 600 and the plurality of channels 411 of the color conversion film 400 are respectively disposed correspondingly, so that light emitted from the light sources 600 can be emitted through the channels 411 or the color conversion units in the channels 411.
The third embodiment of the present invention further provides a display device, including the display panel. The display device in the embodiment of the present invention includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet pc, a paper book, a television, an access control device, a smart phone, a console, and other devices with a display function. Since the display device of the present invention includes the display panel, the display device of the present embodiment has the beneficial effects of the display panel, and is not described herein again.
Referring to fig. 11, a fourth embodiment of the present invention further provides a method for manufacturing a color conversion device, including:
step S01: a substrate 100 is provided, and a scattering layer 200 is formed on the substrate 100.
Step S02: a first planarization layer 810 is formed on the scattering layer 200 and a light-collimating layer 300 is formed on the first planarization layer 810.
Wherein the light collimating layer 300 comprises a plurality of light collimating units for angularly defining the outgoing light.
Step S03: the third planarization layer 830 continues to be formed on the first planarization layer 810.
Wherein the thickness of the third planarization layer 830 is greater than or equal to the extension length of the light-collimating unit in the thickness direction in order to ensure the flatness of the surface of the third planarization layer 830 away from the first planarization layer 810.
Step S04: the color conversion film 400 is formed on the second planarization layer 820.
The color conversion film 400 includes a light blocking layer 410, a plurality of channels 411 penetrating the light blocking layer 410, and color conversion units 420 distributed in at least some of the channels 411. The color conversion unit 420 and the light collimation unit are correspondingly arranged, so that the light collimation unit can limit the emergent light of the color conversion unit 420.
The manufacturing method of the color conversion assembly is not limited thereto, and in some alternative embodiments, before step S02, the method further includes: the bragg reflector layer 500 is formed on the first planarization layer 810 and the second planarization layer 820 is continuously formed, the thickness of the second planarization layer 820 being greater than that of the bragg reflector layer 500. Step S03 then comprises: a third planarization layer 830 continues to be formed on the second planarization layer 820.
Referring to fig. 12a to 12j, the following briefly describes a forming process of the color conversion device, taking the color conversion device shown in fig. 1 as an example, including:
in a first step, as shown in fig. 12a, a substrate 100 is provided. Preferably, a glass substrate 100.
In a second step, as shown in fig. 12b, a scattering layer 200 is formed on the substrate 100. Preferably, the scattering layer 200 is an array of spherical scattering structures 210.
Third, as shown in fig. 12c, a first planarization layer 810 is formed on the scattering layer 200.
In a fourth step, as shown in fig. 12d, a bragg reflector 500 is formed on the first planarization layer 810.
Preferably, the bragg reflective layer 500 may be disposed only for an area where reflection is required, for example, when the light source 600 is a blue light source 600, the bragg reflective layer 500 may be disposed only for red and green sub-pixels.
In a fifth step, as shown in fig. 12e, a second planarization layer 820 is formed on the bragg reflector layer 500. The thickness of the second planarization layer 820 is greater than or equal to the thickness of the bragg reflector layer 500.
Sixth, as shown in fig. 12f, a light collimating layer 300 is formed on the second flattening layer 820.
The light collimating unit of the light collimating layer 300 includes two or more barrier ribs 310 extending along the thickness direction of the color conversion assembly, a light-emitting space 320 formed between adjacent barrier ribs 310, and an opening communicating with the light-emitting space 320, so that light passing through the color conversion unit 420 is emitted to the scattering layer 200 through the opening via the light-emitting space 320.
Seventh, as shown in fig. 12g, a third planarization layer 830 is continuously formed on the second planarization layer 820, and the thickness of the third planarization layer 830 is greater than the thickness of the light-collimating layer 300.
In an eighth step, as shown in fig. 12h, a patterned light blocking layer 410 is formed on the third planarization layer 830, the light blocking layer 410 including a channel 411 disposed therethrough.
Ninth, as shown in fig. 12i, a color conversion unit 420 is formed in at least a part of the channel 411 to form a color conversion member.
In the process of forming the display panel using the color conversion assembly, the method may further include:
tenth, as shown in fig. 12j, a driving backplane 700 is provided, and a plurality of light sources 600 are distributed on the driving backplane 700 in an array.
Finally, the driving backplane 700 with the light source 600 and the color conversion assembly are bonded together using a filling adhesive or the like to form a display panel. The filling adhesive may be disposed in various ways, and in order to ensure the light transmission effect, the filling adhesive is preferably a transparent thermosetting or UV-curable organic polymer, such as polymethyl methacrylate, polysiloxane, polyimide, or the like.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A color conversion assembly, comprising:
a substrate;
the scattering layer is arranged on the substrate;
the light collimation layer is arranged on one side, far away from the substrate, of the scattering layer and comprises a plurality of light collimation units;
the color conversion film comprises a light blocking layer, a plurality of channels penetrating through the light blocking layer and color conversion units distributed in at least part of the channels;
wherein at least part of the light collimating unit is arranged corresponding to the color conversion unit;
a Bragg reflection layer disposed between the scattering layer and the light collimation layer;
the light collimation unit comprises more than two barrier walls extending along the thickness direction of the color conversion assembly, a light emergent space formed between adjacent barrier walls and an opening communicated with the light emergent space, and light penetrating through the color conversion unit is emitted from the light emergent space through the opening;
the barrier ribs are made of light absorbing materials or light reflecting materials, and scattering particles are contained in the barrier ribs.
2. The color conversion assembly of claim 1, wherein the light-emitting space is defined by two or more barrier walls, and one or more light-emitting spaces are defined by the two or more barrier walls corresponding to the color conversion unit.
3. The color conversion assembly according to claim 2,
the orthographic projections of the more than two barrier walls on the substrate are in a stripe shape, and the more than two barrier walls comprise more than two first barrier walls which are distributed at intervals and second barrier walls which surround the peripheries of the more than two first barrier walls;
or, orthographic projections of more than two barrier walls on the substrate are in a grid shape, the more than two barrier walls comprise first barrier walls extending along a first direction and second barrier walls extending along a second direction, the more than two first barrier walls are distributed at intervals, the more than two second barrier walls are distributed at intervals, and the first direction, the second direction and the thickness direction are intersected in pairs;
or the orthographic projections of the barrier walls on the substrate are enclosed into a honeycomb shape;
or, the two or more barrier walls are a plurality of mutually independent columnar bodies, and the orthographic projection of the barrier walls on the substrate is circular or polygonal.
4. The color conversion assembly according to any one of claims 1 to 3,
the extending thickness of the barrier wall is 0.5-5 μm;
and/or the minimum distance between two adjacent barrier walls is 0.3-10 mu m.
5. The color conversion assembly according to any one of claims 1 to 3,
scattering particles are arranged in the scattering layer;
and/or the scattering layer comprises a plurality of scattering structures arranged convexly from the substrate towards the light collimating layer.
6. The color conversion assembly of claim 5, wherein a cross-section of the scattering structure in a thickness direction of the color conversion assembly is any one of an arc shape, a zigzag shape, a polygonal shape, and a combination thereof.
7. A display panel, comprising:
the driving back plate is provided with a plurality of light sources;
the color conversion assembly of any of claims 1-6, and said driving backplane being arranged such that a plurality of said channels and a plurality of said light sources are arranged in correspondence, respectively.
8. A method of manufacturing a color conversion package, comprising:
providing a substrate, and forming a scattering layer on the substrate;
forming a first planarization layer on the scattering layer and a light-collimating layer on the first planarization layer, the light-collimating layer comprising a plurality of light-collimating units;
continuing to form a second planarization layer on the first planarization layer, the second planarization layer having a thickness greater than or equal to the extension of the light-collimating unit in the thickness direction of the color conversion assembly;
forming a color conversion film on the second planarization layer, the color conversion film including a light blocking layer, a plurality of channels extending through the light blocking layer, and color conversion units distributed within at least some of the channels.
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| CN201910577278.8A CN112151571B (en) | 2019-06-28 | 2019-06-28 | Color conversion assembly, display panel and manufacturing method of color conversion assembly |
| KR1020217038301A KR102590282B1 (en) | 2019-06-28 | 2019-12-13 | Color conversion assembly, display panel and manufacturing method of color conversion assembly |
| PCT/CN2019/125164 WO2020258755A1 (en) | 2019-06-28 | 2019-12-13 | Color conversion assembly, display panel and fabrication method for color conversion assembly |
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| CN117178658A (en) * | 2022-03-31 | 2023-12-05 | 京东方科技集团股份有限公司 | Display panel and display device |
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| CN112151571A (en) | 2020-12-29 |
| KR20210151226A (en) | 2021-12-13 |
| KR102590282B1 (en) | 2023-10-17 |
| WO2020258755A1 (en) | 2020-12-30 |
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