CN112233567A - Color conversion assembly, manufacturing method thereof and display panel - Google Patents

Color conversion assembly, manufacturing method thereof and display panel Download PDF

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Publication number
CN112233567A
CN112233567A CN201910568839.8A CN201910568839A CN112233567A CN 112233567 A CN112233567 A CN 112233567A CN 201910568839 A CN201910568839 A CN 201910568839A CN 112233567 A CN112233567 A CN 112233567A
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China
Prior art keywords
layer
color conversion
light
substrate
color
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CN201910568839.8A
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Chinese (zh)
Inventor
李静静
黄飞
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Chengdu Vistar Optoelectronics Co Ltd
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Chengdu Vistar Optoelectronics Co Ltd
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Priority to CN201910568839.8A priority Critical patent/CN112233567A/en
Priority to PCT/CN2020/072461 priority patent/WO2020258864A1/en
Priority to KR1020217038300A priority patent/KR102599014B1/en
Publication of CN112233567A publication Critical patent/CN112233567A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Optical Filters (AREA)

Abstract

The invention discloses a color conversion assembly, a manufacturing method thereof and a display panel. The color conversion assembly includes: a substrate; a light blocking layer on the substrate, having a plurality of channels; a color conversion layer located in at least a portion of the channels, the color conversion layer converting incident light into light of a target color; wherein the light blocking layer includes: a support layer on the substrate; a black matrix layer continuously extending on an upper surface and side surfaces of the support layer, the upper surface of the support layer facing away from the substrate; and a reflective layer continuously extending on an upper surface and a side surface of the black matrix layer, the upper surface of the black matrix layer facing away from the substrate. According to the color conversion assembly provided by the embodiment of the invention, the color crosstalk problem between channels of adjacent sub-pixels can be reduced, and the light extraction efficiency is improved.

Description

Color conversion assembly, manufacturing method thereof and display panel
Technical Field
The invention relates to the field of display, in particular to a color conversion assembly, a manufacturing method thereof and a display panel.
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, there are usually problems of color crosstalk between adjacent sub-pixels and low light extraction efficiency.
Disclosure of Invention
The invention provides a color conversion assembly, a manufacturing method thereof and a display panel, which can reduce the color crosstalk problem between channels of adjacent sub-pixels and improve the light extraction efficiency.
In a first aspect, an embodiment of the present invention provides a color conversion module, which includes:
a substrate;
a light blocking layer on the substrate, having a plurality of channels;
a color conversion layer located in at least a portion of the channels, the color conversion layer converting incident light into light of a target color;
wherein the light blocking layer includes:
a support layer on the substrate;
a black matrix layer continuously extending on an upper surface and side surfaces of the support layer, the upper surface of the support layer facing away from the substrate; and the number of the first and second groups,
and a reflective layer continuously extending on an upper surface and a side surface of the black matrix layer, the upper surface of the black matrix layer facing away from the substrate.
According to one aspect of an embodiment of the invention, the thickness of the color conversion layer is less than or equal to the height from the substrate to the top surface of the light blocking layer.
The thickness of the color conversion layer is not greater than the height from the substrate to the top surface of the light blocking layer, and the color conversion layer is prevented from being in direct contact with the light emitting source, thereby preventing the color conversion layer from being affected by the heat of the light emitting source, causing performance degradation, and causing a problem of affecting the light conversion efficiency of the color conversion layer.
According to one aspect of the embodiments of the present invention, the material of the support layer includes one or more of polyimide resin, epoxy resin, and acrylic resin.
In accordance with one aspect of an embodiment of the present invention, each channel has opposing first and second openings, the first opening being proximate to an incident light ray, the second opening being distal from the incident light ray,
wherein the size of the first opening is larger than that of the second opening;
preferably, the channel has a trapezoidal shape in a cross section perpendicular to the substrate.
The size of the first opening is larger than that of the second opening, so that the path of incident light in the color conversion layer can be increased, the incident light is fully converted and utilized in the color conversion layer, and the utilization rate of light is improved.
According to an aspect of an embodiment of the present invention, the color conversion module further includes:
and the heat dissipation layer is positioned on the upper surface of the reflecting layer, and the upper surface of the reflecting layer faces away from the substrate.
The heat sink layer is capable of conducting heat generated by the light emitting source (e.g., LED) away, reducing the temperature around the color conversion layer, thereby extending the lifetime of the color conversion layer.
According to an aspect of an embodiment of the present invention, each of the channels has a first opening and a second opening opposite to each other, the first opening is close to the incident light, and the second opening is far from the incident light, and the color conversion assembly further includes:
a first color filter layer covering the first opening of the channel containing the color conversion layer; the first color filter layer is configured to allow light in the same wavelength range as the incident light to pass therethrough and reflect light in at least one other wavelength range;
a second color filter layer covering the second opening of the channel containing the color conversion layer; the second color filter layer is configured to allow light exiting through the color conversion layer in the corresponding channel to pass therethrough and to reflect light of at least one other wavelength range.
The first color filter layer can allow light of the same wavelength range as incident light to transmit therethrough and reflect light of at least one other wavelength range, thereby improving color purity. The second color filter layer can reflect or absorb incident light which is not completely absorbed by the color conversion layer in the corresponding channel, and incident light mixed in emergent light is reduced, so that the problem of poor color gamut during display is solved.
According to an aspect of an embodiment of the present invention, the color conversion module further includes:
and a transmissive layer positioned in a channel, in which the color conversion layer is not disposed, among the plurality of channels, the transmissive layer allowing light having the same wavelength range as the incident light to pass therethrough.
By arranging the color conversion layer and the transmission layer, full-color display of pictures can be realized.
According to an aspect of an embodiment of the present invention, each of the channels has a first opening and a second opening opposite to each other, the first opening is close to the incident light, and the second opening is far from the incident light, and the color conversion assembly further includes:
and a third color filter layer covering the first opening of the channel in which the transmissive layer is received, the third color filter layer being configured to allow light of the same wavelength range as that of the incident light to pass therethrough and to reflect light of at least one other wavelength range.
The third color filter layer is configured to allow only light in the same wavelength range as the incident light to pass through, so as to improve the purity of the emergent light of the corresponding channel.
In a second aspect, an embodiment of the present invention provides a display panel, which includes:
a color conversion assembly as in any preceding embodiment;
a light emitting substrate having a light emitting surface, the light emitting substrate including a plurality of light emitting cells;
the color conversion component covers the luminous surface of the luminous substrate, wherein the plurality of channels correspond to the plurality of luminous units respectively.
In a third aspect, an embodiment of the present invention provides a method for manufacturing a color conversion module, including:
forming a light blocking layer on a substrate, the light blocking layer having a plurality of channels;
wherein the step of forming the light blocking layer includes:
forming a patterned support layer on a substrate;
forming a black matrix layer continuously extending on an upper surface and a side surface of the support layer;
a continuously extending reflective layer is formed on the upper surface and the side surface of the black matrix layer,
obtaining a light blocking layer;
a color conversion layer is formed within at least a portion of the channels, the color conversion layer converting incident light to light of a target color.
According to the color conversion member of the embodiment of the present invention, the light blocking layer of the color conversion member includes a support layer, a black matrix layer, and a reflective layer which are disposed in a stacked manner. On the one hand, utilize the supporting layer to support the black matrix layer, improved the height on black matrix layer, effectively increase the thickness on light blocking layer to avoid the colour between the adjacent emergent ray to crosstalk, further, increased the thickness on color conversion layer, so that the incident light is by make full use of in the color conversion layer, improves the utilization ratio of incident light, thereby improves luminous efficiency. On the other hand, the reflecting layer reduces the penetration rate of light penetrating through the wall surface of the channel, and the black matrix layer absorbs incident light penetrating through the reflecting layer, so that the light in the channel is prevented from being transmitted to an adjacent channel, and the color cross problem between the channels of adjacent sub-pixels is prevented. On the other hand, the reflecting layer can reflect the light which is not completely utilized by the color conversion layer to the color conversion layer again, so that the utilization rate of the incident light is improved, and the light emitting efficiency is improved.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 shows a schematic cross-sectional structure of a color conversion assembly according to an embodiment of the invention;
fig. 2 illustrates a schematic cross-sectional structure of a display panel according to an embodiment of the present invention;
FIG. 3 shows a flow diagram of a method of making a color conversion assembly according to one embodiment of the invention;
fig. 4a to 4g are schematic cross-sectional structure diagrams illustrating steps of forming respective components included in a color conversion member in a method of manufacturing a color conversion member according to an embodiment of the present invention.
Description of reference numerals:
1000-a display panel;
100-a color conversion component;
110-a substrate;
120-a light blocking layer; 121-a support layer; 122-a black matrix layer; 123-a reflective layer;
130-channel; OP1 — first opening; OP2 — second opening;
140-a color conversion layer;
150-a heat-dissipating layer;
161-a first color filter layer; 162-a second color filter layer; 163-third color filter layer;
170-a transmissive layer;
200-a light-emitting substrate; 210-a light emitting unit; 211-a filler material;
l1-incident ray.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent 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.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
The embodiment of the invention provides a color conversion assembly which can be applied to a display panel and is used for realizing colorization of emergent light of the display panel. The display panel may be a display panel using a light emitting diode device, such as a Micro-light emitting diode (Micro-LED) display panel, and in some embodiments, may also be a display panel of an organic light emitting diode device (OLED), a liquid crystal display panel (LCD), or the like.
In most embodiments, the description will be made by taking a display panel using Micro-LED devices as an example. Wherein the Micro-LED emits monochromatic light, and the color conversion component converts the monochromatic light into light with various colors for display.
Fig. 1 shows a schematic cross-sectional structure of a color conversion assembly according to an embodiment of the present invention. As shown in FIG. 1, color conversion assembly 100 includes a substrate 110, a light blocking layer 120, a color conversion layer 140. The light blocking layer 120 includes a support layer 121, a Black Matrix (BM) layer 122, and a reflective layer 123.
The light blocking layer 120 is positioned on the substrate 110 and has a plurality of channels 130. The plurality of channels 130 may be arranged in any manner, preferably in an array. Wherein, the support layer 121 in the light blocking layer 120 is located on the substrate 110; the black matrix layer 122 continuously extends on the upper surface and the side surfaces of the support layer 121, the upper surface of the support layer 121 facing away from the substrate 110; the reflective layer 123 continuously extends on the upper surface and the side surface of the black matrix layer 122, and the upper surface of the black matrix layer 122 faces away from the substrate 110. Color conversion layer 140 is positioned within at least a portion of channel 130, and color conversion layer 140 is capable of converting incident light L1 into light of a target color. For example, incident light ray L1 is blue light, and color conversion layer 140 can convert the blue light into red light or green light.
It is noted that in some embodiments, substrate 110 is a transparent substrate through which light emitted from color conversion layer 140 passes. The substrate 110 may be, for example, an inorganic material transparent substrate including glass or quartz, a plastic transparent material including polyethylene terephthalate vinegar, polyethylene naphthalate vinegar, polysodium or polycarbonate, or any type of transparent film.
In some embodiments, the support layer 121 is made of an organic material, for example, one or more of polyimide resin, epoxy resin, and acrylic resin. The support layer 121 may be formed by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like. The black matrix 122 may be formed on the upper surface and the side surface of the support layer 121 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like. The reflective layer 123 may be formed on the upper surface and the side surface of the black matrix layer 122 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like.
The thickness of the support layer 121 (the distance from the base 110 to the top surface of the support layer 121) may be set according to actual requirements. Under the influence of the current black matrix process capability, a thicker black matrix is difficult to prepare, so that the thickness of the color conversion layer cannot be thicker, and the light conversion efficiency of the color conversion layer is not high. The support layer 121 is used to support the black matrix layer 122, so that the thickness of the black matrix layer is indirectly increased, the incident light L1 is fully utilized in the color conversion layer 140, the utilization rate of the incident light is increased, and the light extraction efficiency is improved.
In some embodiments, the reflective layer 123 may be a metal layer having high light reflective properties. The metal may be one or more including, for example, silver, town, aluminum, uranium, button, gold, iron, name, and the like.
Optionally, the light blocking layer 120 has a plurality of channels 130 arranged in an array, the arrangement of the plurality of channels 130 matches the arrangement of the pixels of the corresponding display panel, and the shape of the channels 130 can be adjusted according to the actual design. Wherein, the shape of the cross section of the channel 130 parallel to the substrate 110 may be circular, oval, rectangular, trapezoidal, and the shape with arc-shaped sides; the shape of the cross-section of the channel 130 perpendicular to the substrate 110 may be rectangular, trapezoidal, a shape having arc-shaped sides, or the like. In the present embodiment, the channel 130 has a trapezoidal shape, specifically, an isosceles trapezoidal shape, in a cross section perpendicular to the substrate 110. The cross section of the channel 130 perpendicular to the substrate 110 is trapezoidal, so that light is conveniently reflected towards the emergent direction, and the intensity of emergent light is improved.
Color conversion layer 140 is positioned within at least a portion of channel 130, and color conversion layer 140 is capable of converting incident light L1 into light of a target color. The color conversion layer 140 may be a color conversion layer comprising photoluminescent materials, wherein the photoluminescent materials may be quantum dots, fluorescent particles, or the like. In this embodiment, the color conversion layer is exemplified as a quantum dot layer.
In some embodiments, incident light ray L1 may be a blue light ray and color conversion layer 140 is located within at least a portion of channel 130, e.g., in FIG. 1, left channel 130 and middle channel 130 each house color conversion layer 140. The color conversion layer 140 in the partial channel 130 can emit red light, for example, in fig. 1, the color conversion layer 140 in the left channel 130 is a red quantum dot layer, which absorbs the incident light L1 of blue light and then converts the light into red light to be emitted outward. The color conversion layer 140 in the partial channel 130 can emit green light, for example, in fig. 1, the color conversion layer 140 in the middle channel 130 is a green quantum dot layer, which absorbs the incident light L1 of blue light and then converts the incident light into green light to be emitted outwards.
It is understood that the color of the incident light L1 and the color conversion manner of the color conversion layer 140 are only examples, and in other embodiments, other configurations may be performed. For example, in some embodiments, the incident light ray L1 may be an Ultraviolet (UV) light ray.
According to the color conversion member 100 of the embodiment of the present invention, the light blocking layer 120 includes a support layer 121, a black matrix layer 122, and a reflective layer 123 which are stacked. On the one hand, the support layer 121 is used to support the black matrix layer 122, so that the height of the black matrix layer 122 is increased, and the thickness of the light blocking layer is effectively increased, thereby avoiding color crosstalk between adjacent emergent lights, and further, the thickness of the color conversion layer 140 is increased, so that the incident light L1 is fully utilized in the color conversion layer 140, the utilization rate of the incident light is increased, and the light extraction efficiency is improved. On the other hand, the reflective layer 123 reduces the transmittance of light through the wall surface of the channel, and the black matrix layer 122 absorbs the incident light transmitted through the reflective layer 123, thereby preventing the light in the channel from being transmitted to the adjacent channel and preventing the cross color problem between the channels of the adjacent sub-pixels. On the other hand, the reflective layer 123 can reflect the light that is not completely utilized by the color conversion layer 140 to the color conversion layer 140 again, so as to improve the utilization rate of the incident light, thereby improving the light extraction efficiency.
In some embodiments, the thickness of color conversion layer 140 is less than or equal to the height from substrate 110 to the top surface of light blocking layer 120. In this way, the color conversion layer 140 may not fill the space of the channel 130, and the color conversion layer 140 is prevented from being in direct contact with the light source, so as to prevent the color conversion layer 140 from being affected by the heat of the light source, and the performance of the color conversion layer is prevented from being degraded, which may affect the light conversion efficiency of the color conversion layer 140.
As shown in fig. 1, each of the channels 130 has a first opening OP1 and a second opening OP2 opposite to each other, wherein the first opening OP1 is close to the incident light ray L1, and the second opening OP2 is far from the incident light ray L1.
In some embodiments, the size of the first opening OP1 is larger than that of the second opening OP2, so that the path of the incident light L1 in the color conversion layer 140 can be increased, the incident light L1 can be fully converted and utilized in the color conversion layer 140, and the utilization rate of light can be improved.
In some embodiments, the color conversion assembly 100 further includes a heat sink layer 150 on an upper surface of the reflective layer 123 facing away from the substrate 110. The heat dissipation layer 150 may be made of graphene material, or other heat conductive material. When the color conversion assembly 100 is applied to a display panel, the heat dissipation layer 150 can conduct heat generated by a light source (e.g., an LED) away, and reduce the temperature around the color conversion layer 140, thereby prolonging the lifetime of the color conversion layer 140.
In some embodiments, the color conversion assembly 100 further comprises a first color filter layer 161, the first color filter layer 161 covering the first opening OP1 of the channel 130 containing the color conversion layer 140. In some embodiments, the first color filter layer 161 can allow light of the same wavelength range as the incident light L1 to pass therethrough and reflect light of at least one other wavelength range, thereby improving color purity.
In the present embodiment, the first color filter layer 161 is a distributed bragg reflector layer. Specifically, in the present embodiment, the incident light ray L1 is a blue light ray. The color conversion layer 140 in the left channel 130 is a red quantum dot layer, and correspondingly, the first color filter layer 161 covering the first opening OP1 of the left channel 130 may be configured to allow blue light to pass through and reflect red light. The color conversion layer 140 in the central channel 130 is a green quantum dot layer, and correspondingly, the first color filter layer 161 covering the first opening OP1 of the central channel 130 may be configured to allow blue light to pass through and reflect green light.
In some embodiments, color conversion assembly 100 further includes a second color filter layer 162. Second color filter layer 162 covers second opening OP2 of channel 130 containing color conversion layer 140. In some embodiments, the second color filter layer 162 can reflect or absorb the incident light L1 that is not completely absorbed by the color conversion layer 140 in the corresponding channel 130, so as to reduce the incident light L1 mixed in the emergent light, thereby alleviating the problem of poor color gamut in the display.
In the present embodiment, the second color filter layer 162 is a distributed bragg reflector layer. Second color filter layer 162 is configured to allow light emitted by color conversion layer 140 within corresponding channel 130 to pass therethrough and reflect light of at least one other wavelength range. The second color filter layer 162 reflects light having the same wavelength range as the incident light L1, for example.
Specifically, in the present embodiment, the incident light ray L1 is a blue light ray. The color conversion layer 140 in the left channel 130 is a red quantum dot layer, and correspondingly, the second color filter layer 162 covering the second opening OP2 of the left channel 130 may be configured to allow the red light to pass through and reflect the blue light. The color conversion layer 140 in the central channel 130 is a green quantum dot layer, and correspondingly, the second color filter layer 162 covering the second opening OP2 of the central channel 130 may be configured to allow green light to pass through and reflect blue light.
By providing second color filter layer 162, light emitted by color conversion layer 140 is able to pass through second color filter layer 162, while incident light L1 that is not absorbed by color conversion layer 140 is reflected by second color filter layer 162 back into channel 130, again exciting color conversion layer 140. The structure enhances the intensity of emergent light of the color conversion assembly 100, and effectively improves the color conversion efficiency and the luminous efficiency of a display panel and a display device comprising the color conversion assembly 100.
In some embodiments, the color conversion assembly 100 further comprises a transmissive layer 170. Transmissive layer 170 is positioned within one of plurality of channels 130 that is not provided with color conversion layer 140, and transmissive layer 170 transmits light in the same wavelength range as incident light L1.
As in fig. 1, in this embodiment, the right channel 130 houses a transmissive layer 170. The incident light L1 is blue light, the transmissive layer 170 transmits the blue light, and the emergent light of the corresponding channel is blue light. In fig. 1, the emergent light of the left channel 130 is red, the emergent light of the middle channel 130 is green, the emergent light of the right channel 130 is blue, and the channel 130 emitting red light, the channel 130 emitting green light, and the channel 130 emitting blue light are arranged in an array, so that full-color display of a picture can be realized.
In some embodiments, the color conversion assembly 100 further includes a third color filter layer 163. The third color filter layer 163 covers the first opening OP1 of the channel 130 in which the transmissive layer 170 is received. The third color filter layer 163 is configured to allow light of the same wavelength range as the incident light L1 to pass therethrough and to reflect light of at least one other wavelength range. In some embodiments, the third color filter layer 163 is configured to allow only light in the same wavelength range as the incident light L1 to pass through, so as to improve the purity of the light exiting the corresponding channel 130. The third color filter layer 163 may not be provided in the color conversion member 100.
The color conversion assembly 100 of the embodiment of the invention can be applied to a display panel for colorized display of the display panel.
The embodiment of the present invention further provides a display panel, which includes a light emitting substrate and a color conversion module, wherein the color conversion module of the display panel may be the color conversion module 100 according to any embodiment of the present invention.
Fig. 2 illustrates a schematic cross-sectional structure of a display panel 1000 according to an embodiment of the present invention. The display panel 1000 includes the light emitting substrate 200 and the color conversion assembly 100 of the previous embodiment.
The light emitting substrate 200 has a light emitting surface, and the light emitting substrate 200 includes a plurality of light emitting cells 210. The plurality of light emitting cells 210 may be arranged in any manner, and preferably in an array arrangement. In this embodiment, the light emitting substrate 200 is, for example, a light emitting substrate including LED devices, wherein the plurality of light emitting units 210 are LED light emitting units, respectively, and are arranged in an array. The LED light emitting unit may be a single color LED light emitting unit such that the plurality of light emitting units 210 emit light of the same color. In some embodiments, the light emitting unit 210 is a Micro-LED light emitting unit.
In some embodiments, the light emitting substrate 200 includes a driving circuit for driving the corresponding light emitting cells 210 to emit light. For the light emitting unit 210 being a Micro-LED light emitting unit, the driving circuit at least includes a thin film transistor, and the Micro-LED is electrically connected to the thin film transistor.
The light-emitting substrate 200 is not limited to a light-emitting substrate including LED devices. In other embodiments, the light emitting substrate 200 may also be a light emitting substrate for an OLED display panel, a light emitting substrate for an LCD, that is, the light emitting substrate 200 may include at least a part of functional layers of the OLED display panel, and the OLED display panel is obtained by combining with the color conversion assembly 100; or the light emitting substrate 200 may include at least a portion of functional layers of an LCD, which is obtained by combining with the color conversion assembly 100.
Even if the light emitting substrate 200 is a light emitting substrate using LED devices, the light emitting unit 210 thereof is not limited to a blue LED light emitting unit, for example, in an alternative embodiment, the light emitting unit 210 may be an ultraviolet LED light emitting unit.
The color conversion assembly 100 covers the light emitting surface of the light emitting substrate 200, wherein the plurality of channels 130 correspond to the plurality of light emitting units 210, respectively, and a filling material, such as Liquid Optical Clear Adhesive (LOCA), is disposed between the light emitting units 210 and the color conversion layer 140. Specifically, as shown in fig. 2, the filling material fills the gap between the light emitting unit 210 and the first color filter layer 161 to improve the light extraction rate of the light source and ensure a uniform light propagation path.
In the present embodiment, each of the light emitting units 210 is a blue LED light emitting unit. In the left channel 130 in fig. 2, the light emitted from the blue LED light emitting unit excites the color conversion layer 140, so that the light is converted into red light and emitted outwards; in the middle channel 130 in fig. 2, the light emitted from the blue LED light emitting unit excites the color conversion layer 140, so that the light is converted into green light to be emitted outward; in the right channel 130 in fig. 2, the blue light emitted from the blue LED light emitting unit transmits through the transmissive layer 170 to emit the blue light outwards. The channels 130 emitting red light, the channels 130 emitting green light and the channels 130 emitting blue light are arranged in an array, so that full-color display of pictures can be realized.
According to the display panel 1000 of the embodiment of the present invention, the light blocking layer 120 includes the support layer 121, the black matrix layer 122, and the reflective layer 123 which are stacked. On the one hand, the support layer 121 is used to support the black matrix layer 122, so that the height of the black matrix layer 122 is increased, and the thickness of the light blocking layer is effectively increased, thereby avoiding color crosstalk between adjacent emergent lights, and further, the thickness of the color conversion layer 140 is increased, so that the incident light L1 is fully utilized in the color conversion layer 140, the utilization rate of the incident light is increased, and the light extraction efficiency is improved. On the other hand, the reflective layer 123 reduces the transmittance of light through the wall surface of the channel, and the black matrix layer 122 absorbs the incident light transmitted through the reflective layer 123, thereby preventing the light in the channel from being transmitted to the adjacent channel and preventing the cross color problem between the channels of the adjacent sub-pixels. On the other hand, the reflective layer 123 can reflect the light that is not completely utilized by the color conversion layer 140 to the color conversion layer 140 again, so as to improve the utilization rate of the incident light, thereby improving the light extraction efficiency.
The embodiment of the present invention further provides a method for manufacturing a color conversion module, which will be described below by taking the manufacturing process of the color conversion module 100 of the third embodiment as an example.
Fig. 3 is a flowchart illustrating a method of manufacturing a color conversion member 100 according to an embodiment of the present invention, the method including steps S10 to S20.
In S10, a light blocking layer is formed on the substrate, the light blocking layer having a plurality of channels.
Wherein the step of forming the light blocking layer includes:
and S11, forming a patterned support layer on the substrate. Fig. 4a is a schematic cross-sectional structure diagram illustrating a step of forming a support layer in a method of manufacturing a color conversion assembly according to an embodiment of the present invention. The support layer 121 may be formed on the substrate 110 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, etc., and the support layer 121 has a plurality of channels 130 arranged in an array.
And S12, forming a continuously extending black matrix layer on the upper surface and the side surface of the support layer. Fig. 4b is a schematic cross-sectional structure diagram illustrating a step of forming a black matrix layer in a method of fabricating a color conversion assembly according to an embodiment of the present invention. The black matrix 122 may be formed on the upper surface and the side surface of the support layer 121 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, etc., wherein the thickness of the black matrix 122 is 1 to 20 micrometers, and the Optical Density (OD) of the black matrix 122 is 4.0 or more.
S13, forming continuously extending reflection layers on the upper surface and the side surfaces of the black matrix layer. FIG. 4c is a schematic cross-sectional view illustrating a step of forming a reflective layer in a method of fabricating a color conversion device according to an embodiment of the present invention. The reflective layer 123 may be formed on the upper surface and the side surface of the black matrix layer 122 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like.
At S20, a color conversion layer is formed within at least a portion of the channels, the color conversion layer converting the emitted light to light of a target color.
Before S20, a second color filter layer may be formed in the openings of the partial channels adjacent to the substrate. Fig. 4d is a schematic cross-sectional structure diagram illustrating a step of forming a second color filter layer in a method of fabricating a color conversion assembly according to an embodiment of the present invention. For example, the second color filter layer 162 is formed in an opening of a partial channel close to the substrate by a physical or chemical vapor deposition method, the second color filter layer 162 may be a bragg reflective layer, and light emitted from the color conversion layer is selectively transmitted by adjusting the thickness of the second color filter layer 162, so as to avoid the problem of light leakage from the backlight source.
At S20, fig. 4e is a schematic cross-sectional view illustrating a step of forming a color conversion layer in the method of manufacturing a color conversion assembly according to an embodiment of the present invention. The color conversion layer 140 may be a color conversion layer comprising photoluminescent materials, wherein the photoluminescent materials may be quantum dots, fluorescent particles, or the like.
In the present embodiment, the color conversion layer 140 may be configured into two or more types according to the difference of the emitted light, and for example, may include a color conversion layer 140 that emits red light and a color conversion layer 140 that emits green light. In some embodiments, a photolithography process may be used to form a red-emitting color conversion layer 140 within a portion of the channels 130, where the channel in which the red-emitting color conversion layer 140 is formed may be the channel 130 corresponding to the red subpixel. Thereafter, a photolithography process may be used to form a green light-emitting color conversion layer 140 within a portion of the channels 130, where the channel in which the green light-emitting color conversion layer 140 is formed may be the channel 130 corresponding to the green sub-pixel. It is understood that the color conversion layer 140 emitting green light may be formed first, and then the color conversion layer 140 emitting red light may be formed.
In other embodiments, where the incident light is blue light, as shown in fig. 4e, a transmissive layer 170 may be formed in a portion of the channel, the transmissive layer 170 transmitting the blue light. The transmissive layer 170 may be formed by filling a part of the channel with a light transmissive material, or the transmissive layer 170 may be formed by not filling any material in a part of the channel.
Fig. 4f is a schematic cross-sectional structure diagram illustrating a step of forming a first color filter layer in a method of fabricating a color conversion assembly according to an embodiment of the present invention. As shown in fig. 4f, after the color conversion layer is formed, a first color filter layer may be formed over the color conversion layer 140, i.e., the openings of the partial channels away from the substrate. For example, the first color filter layer 161 is formed by a physical or chemical vapor deposition method, the first color filter layer 161 may be a bragg reflective layer, and the first color filter layer 161 transmits incident light and reflects light having a wavelength range different from that of the incident light, thereby improving the purity of light emitted from the color conversion layer.
FIG. 4g is a schematic cross-sectional view illustrating a step of forming a heat dissipation layer in a method of fabricating a color conversion assembly according to an embodiment of the invention. As shown in fig. 4g, after the first color filter layer is formed, a heat dissipation layer 150 may be formed over the reflective layer 123. For example, a graphene film is deposited over the reflective layer 123 using a chemical vapor deposition method to form the heat dissipation layer 150. It is preferable that the sum of the thicknesses of the heat dissipation layer 150, the reflective layer 123, the black matrix layer 122, and the support layer 121 is greater than the sum of the thicknesses of the first color filter layer 161, the color conversion layer 140, and the second color filter layer 162 to prevent the light emitting unit from being in direct contact with the color conversion layer 140. The graphene has excellent heat-conducting property, and can conduct heat generated by the light-emitting source out in time so as to reduce the ambient temperature around the color conversion layer and prolong the service life of the color conversion layer.
Thus, the color conversion module 100 according to the third embodiment of the present invention is obtained. According to the method for manufacturing the color conversion module of the embodiment of the invention, the light blocking layer of the manufactured color conversion module 100 comprises the support layer, the black matrix layer and the reflecting layer which are arranged in a laminated manner. On the one hand, utilize the supporting layer to support the black matrix layer, improved the height on black matrix layer, effectively increase the thickness on light blocking layer to avoid the colour between the adjacent emergent ray to crosstalk, further, increased the thickness on color conversion layer, so that the incident light is by make full use of in the color conversion layer, improves the utilization ratio of incident light, thereby improves luminous efficiency. On the other hand, the reflecting layer reduces the penetration rate of light penetrating through the wall surface of the channel, and the black matrix layer absorbs incident light penetrating through the reflecting layer, so that the light in the channel is prevented from being transmitted to an adjacent channel, and the color cross problem between the channels of adjacent sub-pixels is prevented. On the other hand, the reflecting layer can reflect the light which is not completely utilized by the color conversion layer to the color conversion layer again, so that the utilization rate of the incident light is improved, and the light emitting efficiency is improved.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A color conversion assembly, comprising:
a substrate;
a light blocking layer on the substrate having a plurality of channels;
a color conversion layer positioned within at least a portion of the channel, the color conversion layer converting incident light to light of a target color;
wherein the light blocking layer comprises:
a support layer on the substrate;
a black matrix layer continuously extending on an upper surface and a side surface of the support layer, the upper surface of the support layer facing away from the substrate; and the number of the first and second groups,
and a reflective layer continuously extending on an upper surface and a side surface of the black matrix layer, the upper surface of the black matrix layer facing away from the substrate.
2. The color conversion assembly of claim 1, wherein the thickness of the color conversion layer is less than or equal to the height from the substrate to the top surface of the light blocking layer.
3. The color conversion assembly of claim 1, wherein the material of the support layer comprises one or more of polyimide resin, epoxy resin, acrylic resin.
4. The color conversion assembly of claim 1, wherein each of said channels has opposing first and second openings, said first opening being proximal to said incident light ray and said second opening being distal to said incident light ray,
wherein the size of the first opening is larger than the size of the second opening;
preferably, the channel has a trapezoidal shape in a cross section perpendicular to the substrate.
5. The color conversion assembly of claim 1, further comprising:
and the heat dissipation layer is positioned on the upper surface of the reflecting layer, and the upper surface of the reflecting layer is back to the substrate.
6. The color conversion assembly of claim 1, wherein each of said channels has opposing first and second openings, said first opening being proximal to said incident light ray and said second opening being distal to said incident light ray, said color conversion assembly further comprising:
a first color filter layer covering the first opening of the channel containing the color conversion layer; the first color filter layer is configured to allow light of the same wavelength range as the incident light to pass therethrough and to reflect light of at least one other wavelength range;
a second color filter layer covering the second opening of the channel containing the color conversion layer; the second color filter layer is configured to allow light exiting through the color conversion layer within the corresponding channel to pass therethrough and to reflect light of at least one other wavelength range.
7. The color conversion assembly of claim 1, further comprising:
a transmissive layer in the channel of the plurality of channels not provided with the color conversion layer, the transmissive layer transmitting light in the same wavelength range as the incident light.
8. The color conversion assembly of claim 7, wherein each of said channels has opposing first and second openings, said first opening being proximal to said incident light ray and said second opening being distal to said incident light ray, said color conversion assembly further comprising:
a third color filter layer covering the first opening of the channel in which the transmissive layer is received, the third color filter layer being configured to allow light of the same wavelength range as the incident light to pass therethrough and to reflect light of at least one other wavelength range.
9. A display panel, comprising: the color conversion assembly according to any one of claims 1 to 8,
a light emitting substrate having a light emitting face, the light emitting substrate including a plurality of light emitting cells;
the color conversion assembly covers the light-emitting surface of the light-emitting substrate, and the channels correspond to the light-emitting units respectively.
10. A method of making a color conversion assembly, comprising:
forming a light blocking layer on a substrate, the light blocking layer having a plurality of channels;
wherein the forming of the light blocking layer includes:
forming a patterned support layer on the substrate;
forming a black matrix layer continuously extending on an upper surface and a side surface of the support layer;
forming a continuously extending reflective layer on upper and side surfaces of the black matrix layer, resulting in the light blocking layer;
forming a color conversion layer within at least a portion of the channels, the color conversion layer converting incident light rays into light rays of a target color.
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