CN112213879A - Color conversion assembly, display panel and display device - Google Patents
Color conversion assembly, display panel and display device Download PDFInfo
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- CN112213879A CN112213879A CN201910620222.6A CN201910620222A CN112213879A CN 112213879 A CN112213879 A CN 112213879A CN 201910620222 A CN201910620222 A CN 201910620222A CN 112213879 A CN112213879 A CN 112213879A
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- 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
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- 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
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- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a color conversion assembly, a display panel and a display device. The color conversion assembly includes: the black matrix layer comprises a first sublayer and a second sublayer which are arranged in a stacked mode, and the black matrix layer comprises a plurality of channels, wherein each channel comprises a first sub-channel penetrating through the first sublayer and a second sub-channel penetrating through the second sublayer and communicated with the first sub-channel; a color conversion layer located within a first sub-channel of at least a portion of the channels; and a color filter assembly disposed corresponding to the channel accommodating the color conversion layer. According to the color conversion assembly provided by the embodiment of the invention, the second sub-channel can perform certain convergence on the light converted by the color conversion layer, so that the mutual crosstalk with the emergent light of the adjacent channel is reduced, and the cross color problem between the channels corresponding to the adjacent sub-pixels is reduced.
Description
Technical Field
The invention relates to the field of display, in particular to a color conversion assembly, a display panel and a display device.
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 thus 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 is usually a problem of color crosstalk between adjacent sub-pixels.
Disclosure of Invention
The invention provides a color conversion assembly, a display panel and a display device, which can reduce the color crosstalk problem between adjacent channels.
In a first aspect, an embodiment of the present invention provides a color conversion module, which includes: the black matrix layer comprises a first sublayer and a second sublayer which are arranged in a stacked mode, and the black matrix layer comprises a plurality of channels, wherein each channel comprises a first sub-channel penetrating through the first sublayer and a second sub-channel penetrating through the second sublayer and communicated with the first sub-channel; a color conversion layer located within the first sub-channel of at least a portion of the channels, the color conversion layer capable of converting incident light into light of a target color; and a color filter assembly disposed corresponding to the channel in which the color conversion layer is received, wherein at least a portion of the color filter assembly is located in the second sub-channel of the corresponding channel, the color filter assembly being configured to allow light converted by the color conversion layer in the corresponding channel to pass therethrough and to block light of at least one other wavelength range from passing therethrough.
According to the color conversion assembly of the embodiment of the invention, a plurality of channels of the black matrix layer may correspond to a plurality of sub-pixels of the display panel. The color conversion layer is located in the first sub-channel, light converted by the color conversion layer needs to be transmitted outwards after passing through the second sub-channel of the corresponding channel instead of being directly diffused all around, namely the second sub-channel of the corresponding channel can carry out certain convergence on the light converted by the color conversion layer, and emergent light of the channel is reduced to be transmitted to an area where an adjacent channel is located, so that mutual crosstalk with the emergent light of the adjacent channel is reduced, and the cross color problem occurring between channels corresponding to adjacent sub-pixels is reduced.
The second sub-channel of the channel containing the color conversion layer can be provided with a color filter assembly, and can prevent the light rays of at least one color other than the light rays converted by the color conversion layer from being transmitted to the outside of the corresponding channel, improve the purity of the emergent light rays of the channel and relieve the problem of poor color gamut when a picture is displayed.
According to an aspect of the embodiment of the present invention, each of the first sub-channels includes a first opening and a second opening opposite to each other in a thickness direction of the color conversion member, wherein the second opening is adjacent to the second sub-channel, at least a part of an inner wall of each of the first sub-channels is obliquely disposed with respect to an interface of the first sub-layer and the second sub-layer, and a size of the second opening is larger than a size of the first opening; and/or each second sub-channel comprises a third opening and a fourth opening which are opposite in the thickness direction of the color conversion assembly, wherein the third opening is close to the first sub-channel, at least part of the inner wall of each second sub-channel is obliquely arranged relative to the interface of the first sub-layer and the second sub-layer, and the size of the fourth opening is smaller than that of the third opening.
At least part of inner walls of the first sub-channels are obliquely arranged and the second openings are larger than the first openings, so that light rays in the first sub-channels are transmitted towards the second openings under the reflection of the inner walls of the first sub-channels, and the light emitting efficiency and the utilization rate of incident light rays are improved under the condition that the channel intervals (corresponding pixel intervals) are guaranteed to be at reasonable values.
Through setting up the slope of at least part inner wall of second subchannel and setting up being less than the third opening of fourth opening for the light that passes through the second subchannel converges to the center pin direction of second subchannel, under the circumstances that guarantees that luminous efficiency is in reasonable value, reduces light and spreads to adjacent passageway place region, thereby reduces and crosstalks each other with adjacent passageway emergent ray.
According to an aspect of an embodiment of the present invention, a color filter assembly includes: a light absorbing layer within the second sub-channel of the channel housing the color conversion layer, the light absorbing layer being capable of absorbing light in the same wavelength range as the incident light.
According to an aspect of an embodiment of the present invention, the color filter assembly further includes: the first distributed Bragg reflection layer is positioned between the color conversion layer and the light absorption layer and is configured to allow the light converted by the color conversion layer in the corresponding channel to transmit and reflect the light in at least one other wavelength range; and/or, the color filter assembly further comprises: and the second distributed Bragg reflection layer is positioned on the side, away from the color conversion layer, of the light absorption layer, and is configured to allow the light converted by the color conversion layer in the corresponding channel to pass through and reflect the light in at least one other wavelength range.
The first distributed Bragg reflection layer can reflect light rays with the same wavelength range as incident light rays, so that the incident light rays which are not completely converted by the color conversion layer can be reflected to the color conversion layer again for conversion, and the utilization rate of the incident light rays is improved. Meanwhile, the residual quantity of incident rays in the emergent rays of the channel is reduced.
The second distributed Bragg reflection layer can reflect light rays with the same wavelength range as the incident light rays, so that the incident light rays which are not completely converted by the color conversion layer and are not absorbed by the light absorption layer can be reflected into the light absorption layer again for absorption, the residual quantity of the incident light rays in the emergent light rays of the channel is further reduced, and the wider color gamut during display is realized.
According to an aspect of an embodiment of the present invention, the color conversion module further includes: and a transmissive layer in at least a portion 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.
According to one aspect of the embodiment of the invention, the scattering particles are mixed in the transmission layer, so that the light rays in the channel corresponding to the transmission layer can be more uniformly spread outwards, and the display effect is improved.
According to an aspect of an embodiment of the present invention, the color conversion module further includes: the antireflection film is positioned on one side of the transmission layer opposite to the light incident side, so that light rays in the corresponding channels of the transmission layer can be transmitted outwards in a higher proportion, and the light energy utilization rate of the incident light rays is improved.
According to an aspect of an embodiment of the present invention, the color conversion module further includes: and the third distributed Bragg reflection layer is positioned at the first opening of at least part of the first sub-channel and is configured to allow light rays in the same wavelength range as the incident light rays to pass through and reflect light rays in at least one other wavelength range.
The third distributed Bragg reflection layer allows incident light to enter the channel, and reflects light of other colors obtained by conversion in the channel, so that the converted light irradiates the light emitting side opposite to the light source, and the utilization rate of light energy is improved.
According to an aspect of an embodiment of the present invention, the color conversion module further includes: and the reflecting layer is positioned on at least part of the inner wall of the channel. The reflecting layer can reflect light rays in the channels, so that the light emitting efficiency of the color conversion assembly is further improved, and the color crosstalk problem between the channels of the adjacent sub-pixels is further reduced.
In a second aspect, an embodiment of the present invention provides a display panel, which includes: a light emitting substrate including a plurality of light emitting cells; and a color conversion assembly according to any of the above embodiments, wherein the color conversion layer in the color conversion assembly is disposed on the light emitting side of the light emitting substrate, and the plurality of channels of the color conversion assembly correspond to the plurality of light emitting cells, respectively.
In a third aspect, an embodiment of the invention provides a display device, which includes the display panel according to any one of the above embodiments.
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. 3a to 3k are schematic cross-sectional views illustrating a manufacturing process of a color conversion assembly according to an embodiment of the present invention.
In the figure:
1000-a display panel;
100-a color conversion component;
110-a planar layer; 110 a-flat side;
120-black matrix layer; an AS-channel; 121-a first sublayer; a1 — first subchannel; k1 — first opening; k2 — second opening; 122-a second sublayer; a2 — second subchannel; k3 — third opening; k4-fourth opening;
130-a color conversion layer;
140-a color filter assembly; 141-a light absorbing layer; 142-a first distributed bragg reflector layer; 143-a second distributed bragg reflector layer;
150-a transmissive layer;
160-antireflection film;
170-third distributed bragg reflector layer;
180-a reflective layer;
190-a substrate;
200-a light-emitting substrate; 200 a-a light emitting face; 210-a light emitting unit;
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 Light Emitting Diode (LED) devices, such as a Micro-LED Display panel, and in some embodiments, may also be an Organic Light Emitting Diode (OLED) Display panel, a Liquid Crystal Display (LCD) panel, and the like.
In most embodiments, the description will be made by taking a display panel using LED devices as an example. The color conversion component converts light emitted by the LED into target light of multiple colors for display.
FIG. 1 is a schematic cross-sectional view of a color conversion assembly according to an embodiment of the present invention, in which
Fig. 1 shows the structure of a part of the region of the color conversion member. The color conversion assembly 100 includes a Black Matrix (BM) layer 120, a color conversion layer 130, and a color filter assembly 140.
The black matrix layer 120 includes a first sublayer 121 and a second sublayer 122 that are stacked. The black matrix layer 120 includes a plurality of channels AS. In some embodiments, the plurality of channels AS are arranged in an array. Each channel AS comprises a first sub-channel a1 extending through the first sublayer 121 and a second sub-channel a2 extending through the second sublayer 122 and communicating with the first sub-channel a 1.
The black matrix layer 120 is made of a black light absorbing material, and may be a colorant of a black pigment or dye. In some embodiments, the black matrix layer 120 is made of a material including a photosensitizer, a black pigment, a surfactant, a film-forming resin, and a solvent. Among them, the black pigment may be titanium black, lignin black, a composite oxide pigment such as iron or manganese, a combination of the above pigments, and the like.
In this embodiment, the incident light L1 is irradiated in a direction passing through the first sub-channel a1 and the second sub-channel a2 in sequence, and the first sub-layer 121 is closer to the light incident side of the color conversion device than the second sub-layer 122.
The color conversion layer 130 may be a layer structure that realizes color conversion by filtering light, or may be a color conversion layer including a photoluminescent material, which may be a quantum dot layer, a fluorescent particle layer, or the like. In this embodiment, the color conversion layer is exemplified as a quantum dot layer.
The quantum dot layer is made of quantum dot material capable of forming a specific excitation wavelength, the quantum dot material includes, but is not limited to, quantum dot material with zinc sulfide (ZnS) as shell and one or more of cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS), indium phosphide (InP), perovskite as core, and the quantum dot material further includes scatterer such as titanium oxide, or silicon dioxide.
In some embodiments, incident light ray L1 may be a blue light ray, and color conversion layer 130 is located within first sub-channel A1 of at least a portion of channel AS. For example, in fig. 1, the first sub-channel a1 of the left-hand channel AS and the first sub-channel a1 of the middle-hand channel AS each house a color conversion layer 130. The color conversion layer 130 in the partial channel AS can convert red light, for example, in fig. 1, the color conversion layer 130 in the first sub-channel a1 of the left channel AS is a red quantum dot layer, which absorbs the incident light L1 of blue light and converts the blue light into red light to be emitted outward. The color conversion layer 130 in the partial channel AS can convert green light, for example, in fig. 1, the color conversion layer 130 in the first sub-channel a1 of the middle channel AS is a green quantum dot layer, which absorbs the incident light L1 of blue light and converts the incident light into green light to be emitted outward.
It is understood that the color of incident light ray L1 and the color conversion manner of color conversion layer 130 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. For example, in some embodiments, the color conversion layer 130 is housed within the first sub-channel a1 of each channel AS, where the color conversion layer 130 within a portion of the channel AS is a quantum dot layer that converts incident light L1 into red light; the color conversion layer 130 in the partial channel AS is a quantum dot layer that converts the incident light L1 into green light; color conversion layer 130 in partial channel AS is a quantum dot layer that converts incident light L1 into blue light. In addition, the color conversion layer 130 is not limited to converting the incident light L1 into red, green and blue light, and in other embodiments, the color conversion layer 130 in the first sub-channel a1 of the partial channel AS may be a quantum dot layer that converts the incident light L1 into yellow light, cyan light, and the like.
The color conversion assembly 100 of the embodiment of the present invention further includes a color filter assembly 140. Color filter assemblies 140 are positioned corresponding to a channel AS housing color conversion layer 130, with at least a portion of color filter assemblies 140 positioned within a second sub-channel a2 of the corresponding channel AS. The color filter assembly 140 is configured to allow light converted by the color conversion layer 130 in the corresponding channel AS to pass therethrough and to block light of at least one other wavelength range from passing therethrough. In some embodiments, color filter assembly 140 is configured to block light rays in the same wavelength range as incident light ray L1.
According to the color conversion assembly 100 of the embodiment of the invention, the plurality of channels AS of the black matrix layer 120 may correspond to the plurality of sub-pixels of the display panel. The color conversion layer 130 is located in the first sub-channel a1, the light converted by the color conversion layer 130 needs to pass through the second sub-channel a2 of the corresponding channel AS and then propagate outwards rather than directly disperse around, that is, the second sub-channel a2 of the corresponding channel AS can converge the light converted by the color conversion layer 130 to a certain extent, and the light emitted from the channel AS is reduced from propagating to the area where the adjacent channel AS is located, so that the mutual crosstalk with the light emitted from the adjacent channel AS is reduced, and the cross color problem occurring between the channels AS corresponding to the adjacent sub-pixels is reduced.
The second sub-channel a2 of the channel AS containing the color conversion layer 130 may be provided with a color filter assembly 140, which can prevent at least one color light other than the light converted by the color conversion layer 130 from propagating to the outside of the corresponding channel AS, thereby improving the purity of the emergent light of the channel AS and alleviating the problem of poor color gamut when displaying a picture.
Specifically, when incident light L1 is a blue light, color conversion layer 130 housed in partial channel AS is a red quantum dot layer, and color conversion layer 130 housed in partial channel AS is a green quantum dot layer, color filter assembly 140 may be configured to prevent the blue light from passing through, thereby reducing the blue light residue in the light emitted from channel AS housing color conversion layer 130.
In some embodiments, each first sub-channel a1 includes a first opening K1 and a second opening K2 opposite in the thickness direction of the color conversion assembly 100, wherein the second opening K2 is proximate to the second sub-channel a2 and correspondingly the first opening K1 is distal from the second sub-channel a 2.
In some embodiments, at least a portion of the inner wall of each first sub-passage a1 is obliquely disposed with respect to the interface of the first sublayer 121 and the second sublayer 122, and the size of the second opening K2 is greater than the size of the first opening K1.
The inclination angle of at least a portion of the inner wall of the first sub-channel a1 with respect to the interface between the first sublayer 121 and the second sublayer 122 can be configured according to the design requirement of the light energy utilization efficiency of the incident light and the design requirement of the channel AS pitch (e.g., corresponding to the pixel pitch). By obliquely arranging at least part of the inner wall of the first sub-channel a1 and arranging the second opening K2 to be larger than the first opening K1, the light rays in the first sub-channel a1 are transmitted in the direction of the second opening K2 under the reflection of the inner wall of the first sub-channel a1, and the light extraction efficiency and the utilization rate of the incident light rays L1 are improved under the condition that the channel AS spacing (e.g. the corresponding pixel spacing) is ensured to be at a reasonable value.
In some embodiments, each of the second sub-channels a2 includes a third opening K3 and a fourth opening K4 opposite in a thickness direction of the color conversion assembly 100, wherein the third opening K3 is close to the first sub-channel a1, and correspondingly, the fourth opening K4 is far from the first sub-channel a 1.
In some embodiments, at least a portion of the inner wall of each second sub-passage a2 is obliquely disposed with respect to the interface of the first sublayer 121 and the second sublayer 122, and the size of the fourth opening K4 is smaller than the size of the third opening K3.
The inclination angle of at least a portion of the inner wall of the first sub-channel a1 with respect to the interface between the first sublayer 121 and the second sublayer 122 can be configured according to the design requirement of the light energy utilization efficiency of the incident light and the design requirement of the convergence capability of the light. At least part of the inner wall of the second sub-channel A2 is obliquely arranged, and the fourth opening K4 smaller than the third opening K3 is arranged, so that the light passing through the second sub-channel A2 converges towards the central axis direction of the second sub-channel A2, and under the condition that the light extraction efficiency is guaranteed to be at a reasonable value, the light is reduced to be transmitted to the area where the adjacent channel AS is located, and the mutual crosstalk between the light and the emergent light of the adjacent channel AS is reduced.
In some embodiments, the color conversion assembly 100 further comprises a reflective layer 180. The reflective layer 180 is located on at least a portion of the inner wall of the channel AS. In some embodiments, the reflective layer 180 may be a film layer of high reflective material plated on the inner wall of the channel AS, wherein the reflective material includes, but is not limited to, a metal material such AS silver, aluminum, etc.
Through setting up reflection stratum 180, can reflect the light in the passageway AS to further improve color conversion subassembly 100's luminous efficacy, further reduce the cross color problem between the passageway AS of adjacent sub-pixel.
In some embodiments, color filtering assembly 140 includes a light absorbing layer 141, light absorbing layer 141 being located within second sub-channel A2 of channel AS housing color conversion layer 130. The light absorbing layer 141 can absorb light in the same wavelength range AS the incident light L1, thereby reducing the residual amount of the incident light L1 in the outgoing light of the channel AS, and realizing a wider color gamut in display.
In some embodiments, the light absorbing layer 141 is a photoresist layer mixed with a light absorbing material. The incident light L1 is, for example, blue light, and the light absorbing material may be a dye that absorbs blue light, such as a yellow dye.
In some embodiments, color filtering assembly 140 may further include a first distributed bragg reflective layer 142, the first distributed bragg reflective layer 142 being located between the color conversion layer 130 and the light absorbing layer 141. The first distributed bragg reflector layer 142 is configured to allow light converted by the color conversion layer 130 in the corresponding channel AS to pass therethrough and reflect light of at least one other wavelength range.
The first distributed bragg reflector layer 142 may be formed by stacking two kinds of thin films having high and low refractive indexes, and the combination of the two kinds of thin films includes, but is not limited to: TiO 22Film and Al2O3Film, TiO2Film and SiO2Film, Ta2O5Film and Al2O3Film, HfO2Film and SiO2And the film comprises a high-refractive-index film and a low-refractive-index film in each combination.
In some embodiments, the first distributed bragg reflector layer 142 may reflect light having the same wavelength range as the incident light L1, so that the incident light L1 that is not completely converted by the color conversion layer 130 can be reflected to the color conversion layer 130 again for conversion, thereby improving the utilization rate of the incident light L1. Meanwhile, the residual quantity of the incident ray L1 in the emergent ray of the channel AS is reduced. In some embodiments, the specific material and thickness of the thin film may be adjusted to make the first dbr 142 more effective.
In some embodiments, color filter assembly 140 may further include a second distributed bragg reflector layer 143, the second distributed bragg reflector layer 143 being located on a side of the light absorbing layer 141 facing away from the color conversion layer 130. The second distributed bragg reflector 143 is configured to allow light converted by the color conversion layer 130 in the corresponding channel AS to pass therethrough and reflect light of at least one other wavelength range.
The second distributed bragg reflector layer 143 may be formed by stacking two kinds of thin films having high and low refractive indexes, the combination of which includes, but is not limited to: TiO 22Film and Al2O3Film, TiO2Film and SiO2Film, Ta2O5Film and Al2O3Film, HfO2Film and SiO2And the film comprises a high-refractive-index film and a low-refractive-index film in each combination.
In some embodiments, the second distributed bragg reflector layer 143 may reflect light having the same wavelength range AS the incident light L1, so that the incident light L1 that is not completely converted by the color conversion layer 130 and is not absorbed by the light absorption layer 141 can be reflected into the light absorption layer 141 again for absorption, and the residual amount of the incident light L1 in the outgoing light of the channel AS is further reduced, thereby realizing a wider color gamut in display. In some embodiments, the specific material and thickness of the thin film may be adjusted to make the second distributed bragg reflector 143 more effective.
It should be noted that the color filter assembly 140 is not limited to the above-described exemplary structure. In some embodiments, the color filtering assembly 140 may include only the light absorbing layer 141; in some embodiments, the color filtering component 140 may include a light absorbing layer 141 and a first distributed bragg reflector layer 142; in some embodiments, the color filtering component 140 may include a light absorbing layer 141 and a second distributed bragg reflector layer 143; in some embodiments, the color filtering component 140 may include both the light absorbing layer 141, the first distributed bragg reflector layer 142, and the second distributed bragg reflector layer 143.
In some embodiments, the color conversion assembly 100 further comprises a transmissive layer 150. Transmissive layer 150 is positioned in at least a portion of plurality of channels AS not having color conversion layer 130 positioned therein, wherein transmissive layer 150 transmits light in the same wavelength range AS incident light L1. The transmissive layer 150 may be a transparent photoresist layer.
AS shown in fig. 1, in the present embodiment, the right channel AS accommodates a transmissive layer 150. The incident light L1 is blue light, the transmissive layer 150 allows the blue light to pass through, and the emergent light corresponding to the channel is blue light. In fig. 1, the emergent light of the left channel AS is red, the emergent light of the middle channel AS is green, the emergent light of the right channel AS is blue, and the channel AS emitting red light, the channel AS emitting green light, and the channel AS emitting blue light are arranged in an array, so that full-color display of a picture can be realized.
In some embodiments, scattering particles are mixed in the transmissive layer 150, so that the light rays in the transmissive layer 150 corresponding to the channels AS can be more uniformly spread outwards, thereby improving the display effect. The scattering particles may be TiO2Or other metal particles.
In some embodiments, color conversion assembly 100 further comprises an antireflective film 160. The antireflection film 160 is located on a side of the transmission layer 150 opposite to the light incident side, so that light rays in the channel AS corresponding to the transmission layer 150 can be transmitted outward at a higher ratio, and the light energy utilization rate of the incident light ray L1 is improved. In some embodiments, antireflection film 160 may be a narrow band blue light antireflection film.
In some embodiments, the color conversion assembly 100 further includes a third distributed bragg reflector layer 170. The third distributed bragg reflector layer 170 is located in the first opening K1 of at least a portion of the first sub-channel a1, and the third distributed bragg reflector layer 170 is configured to allow light in the same wavelength range as the incident light L1 to pass therethrough and reflect light in at least one other wavelength range.
The third distributed bragg reflector layer 170 may be formed by stacking two kinds of thin films having high and low refractive indexes, and the combination of the two kinds of thin films includes, but is not limited to: TiO 22Film and Al2O3Film, TiO2Film and SiO2Film, Ta2O5Film and Al2O3Film, HfO2Film and SiO2And the film comprises a high-refractive-index film and a low-refractive-index film in each combination.
In some embodiments, the third distributed bragg reflector layer 170 is disposed at the first opening K1 of the first sub-channel a1 of each channel AS. When the incident light L1 is blue light, the third dbr 170 may be configured to allow the blue light to pass through and reflect the red light and the green light. In some embodiments, the specific material and thickness of the thin film can be adjusted to make the third dbr 170 more effective.
According to the color conversion assembly 100 of the above embodiment, the third distributed bragg reflector allows the incident light L1 to enter the channel AS, and reflects the converted lights of other colors in the channel AS, so that the converted lights all illuminate the light-emitting side opposite to the light source, thereby improving the utilization rate of light energy.
In some embodiments, the color conversion assembly 100 may further include a flat layer 110, and the flat layer 110 is located on the light incident side of the black matrix layer 120. In some embodiments, the planar layer 110 includes a planar surface 110a, the first sub-layer 121 of the black matrix layer 120 is located on the planar surface 110a of the planar layer 110, and the second sub-layer 122 is located on a side of the first sub-layer 121 facing away from the planar layer 110.
The flat layer 110 may be made of an organic material, such as Cardo resin, polyimide resin, or acrylic resin, and can provide the flat surface 110a for other layer structures or components of the color conversion layer 130.
In some embodiments, the color conversion assembly 100 may further include a substrate 190, and the substrate 190 is located on a side of the black matrix layer 120 opposite to the light incident side. In the present embodiment, the substrate 190 is located on a side of the black matrix layer 120 facing away from the planarization layer 110. The substrate 190 and the planar layer 110 together enclose the plurality of channels AS.
The material of the substrate 190 may be glass or a polymer material, wherein an alternative polymer material is, for example, polycarbonate, polyvinyl chloride, polyester, acrylic resin, or the like. In some embodiments, the substrate 190 may be bonded to the black matrix layer 120 by an adhesive and cover the plurality of channels AS, and at the same time, the substrate 190 covers the second distributed bragg reflector 143, the antireflection film 160, and the like disposed corresponding to the channels AS. The adhesive can be a high-transmittance optical adhesive material, such as a thermosetting or UV curing material, a liquid optical transparent adhesive, and the like, which not only can ensure good transmittance of light, but also can achieve a light uniformizing effect.
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 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 200a, and the light emitting substrate 200 includes a plurality of light emitting cells 210. In some embodiments, the plurality of light emitting cells 210 are arranged in an array. In the present embodiment, the light emitting substrate 200 is, for example, a light emitting substrate using an LED device, wherein the plurality of light emitting units 210 are LED light emitting units respectively and are arranged in an array on the light emitting surface 200 a. 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 blue LED light emitting unit. In some embodiments, the light emitting unit 210 is a Micro-LED light emitting unit. In some embodiments, the light emitted from the light emitting unit 210 is the incident light L1 in the color conversion assembly 100 of the previous embodiment.
The light-emitting substrate 200 is not limited to a light-emitting substrate using an LED device. 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 layer 130 in the color conversion assembly 100 is disposed on the light-emitting side of the light-emitting substrate 200. In the present embodiment, the color conversion member 100 has the planarization layer 110 disposed on the light incident side of the black matrix layer 120, the planarization layer 110 of the color conversion member 100 is disposed on the light emitting surface 200a of the light emitting substrate 200, and the planarization layer 110 can be used to improve the planarization of the light emitting surface 200a of the light emitting substrate 200. In some embodiments, the light emitting units 210 are arranged on the surface of the light emitting surface 200a and have a protrusion height protruding from the light emitting surface 200a, and the thickness of the planarization layer 110 may be equal to or greater than the protrusion height of the light emitting units 210.
The plurality of channels AS of the color conversion assembly 100 correspond to the plurality of light emitting cells 210, respectively. In the present embodiment, each of the light emitting units 210 is a blue LED light emitting unit. In the left channel AS in fig. 2, the light emitted from the blue LED light emitting unit excites the color conversion layer 130, so that the light is converted into red light and emitted outwards; in the middle channel AS in fig. 2, the light emitted from the blue LED light emitting unit excites the color conversion layer 130, so that the light is converted into green light to be emitted outward; in the right channel AS in fig. 2, the blue light emitted from the blue LED light emitting unit transmits through the transmissive layer 150 and emits the blue light outwards. The channel AS emitting red light, the channel AS emitting green light and the channel AS emitting blue light are arranged in an array mode, and full-color display of pictures can be achieved.
The embodiment of the invention also provides a display device which can comprise the display panel of any one of the above embodiments. In some embodiments, the display device is, for example, the display panel 1000 including the above-described embodiments. The display device can be a product or a component with a television function, such as a mobile phone, a tablet computer, a television, a display, a digital photo frame or a navigator.
According to the display panel 1000 and the display device of the embodiment of the invention, the plurality of channels AS of the black matrix layer 120 of the color conversion assembly 100 may correspond to the plurality of light emitting units 210 of the light emitting substrate 200 to form a plurality of sub-pixels of the display panel 1000. The color conversion layer 130 of the color conversion assembly 100 is located in the first sub-channel a1, and the light converted by the color conversion layer 130 needs to propagate outwards through the second sub-channel a2 of the corresponding channel AS rather than directly diverging to the periphery, that is, the second sub-channel a2 of the corresponding channel AS can converge the light converted by the color conversion layer 130 to a certain extent, and reduce the outgoing light of the channel AS from propagating to the area where the adjacent channel AS is located, thereby reducing the crosstalk with the outgoing light of the adjacent channel AS, and reducing the cross color problem occurring between the channels AS corresponding to the adjacent sub-pixels.
The second sub-channel a2 of the channel AS containing the color conversion layer 130 may be provided with a color filter assembly 140, which can prevent at least one color light other than the light converted by the color conversion layer 130 from propagating to the outside of the corresponding channel AS, thereby improving the purity of the emergent light of the channel AS and alleviating the problem of poor color gamut when the display panel 1000 displays a picture.
The manufacturing process of the color conversion module 100 of the above embodiment will be explained below. The manufacturing process of the color conversion assembly 100 is various. In some embodiments, the color conversion element 100 may be fabricated by forming layers in a stepwise manner in a direction from the flat layer 110 to the substrate 190. In other embodiments, the color conversion element 100 may be fabricated by forming layers in a stepwise manner in a direction from the substrate 190 to the planarization layer 110.
Further, in some embodiments, the fabrication process of the color conversion assembly 100 may be formed by the combination of two sub-assemblies. For example, the first subassembly and the second subassembly may be formed first. The first sub-assembly includes a planar layer 110 and a first sub-layer 121 formed on a side surface of the planar layer 110, and the first sub-layer 121 includes a plurality of first sub-channels a 1. A third distributed bragg reflector layer 170 is formed within the first sub-channel a 1. Color conversion layer 130 is formed within a portion of first sub-channel a 1; the transmissive layer 150 is formed in a portion of the first sub-passage a 1. The second subassembly includes a substrate 190 and a second sub-layer 122 formed on one side surface of the substrate 190, and the second sub-layer 122 includes a plurality of second sub-channels a 2. A color filter assembly 140 is formed in a portion of the second sub-channel a 2; a transmissive layer 150 and an antireflection film 160 are formed in a portion of the second sub-passage a 2. Then, the first subassembly and the second subassembly may be combined, wherein the first sub-layer 121 and the second sub-layer 122 face each other, the flat layer 110 and the substrate 190 are disposed away from each other, and the plurality of first sub-channels a1 and the plurality of second sub-channels a2 are respectively and correspondingly communicated, so as to form the color conversion assembly 100 by splicing.
One of the fabrication processes of the color conversion assembly 100 is illustrated below, which is to form the layers in a stepwise manner in a direction from the substrate 190 to the planarization layer 110.
Fig. 3a to 3k are schematic cross-sectional views illustrating a manufacturing process of a color conversion assembly according to an embodiment of the present invention.
As in fig. 3a, a substrate 190 is provided; a patterned second distributed bragg reflector layer 143 and a patterned anti-reflection film 160 are formed on one surface of the substrate 190.
The process of forming the second distributed bragg reflector layer 143 may be a physical vapor deposition, a chemical vapor deposition, or the like. The second distributed bragg reflector 143 may be disposed at a position corresponding to a channel for emitting red light and a channel for emitting green light. The second distributed bragg reflector 143 may be configured to allow red light and blue light to pass therethrough and reflect blue light.
As shown in fig. 3b, a patterned second sub-layer 122 is formed on a surface of the substrate 190 having the second distributed bragg reflector 143 and the antireflection film 160. The second sub-layer 122 is a sub-layer of the black matrix layer 120. The second sublayer 122 comprises a plurality of second sub-channels a2 arranged in an array, each second sub-channel a2 having opposite third and fourth openings K3 and K4, wherein the fourth opening K4 faces the substrate 190. Processes of forming the second sub-layer 122 include film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, and the like.
The second distributed bragg reflector 143 and the antireflection film 160 are respectively located in the corresponding second sub-channels a 2.
In addition, the reflective layer 180 may be formed on at least a portion of the inner wall of the second sub-passage a 2. The process of forming the reflective layer 180 may be physical vapor deposition, chemical vapor deposition, etc., and the reflective layer 180 may be a film layer of a highly reflective material plated on the inner wall of the second sub-passage a2, wherein the reflective material includes, but is not limited to, a metal material such as silver, aluminum, etc.
As shown in FIG. 3c, transmissive layer 150 is formed in second sub-passage A2, which contains antireflection film 160. The process of forming the transmissive layer 150 may be a printing process, a yellow light process, or the like. Scattering particles may be mixed in the transmissive layer 150.
As shown in fig. 3d, the light absorbing layer 141 is formed within the second sub-channel a2 accommodating the second distributed bragg reflector layer 143. The light absorbing layer 141 is a photoresist layer mixed with a light absorbing material, which may be a dye that absorbs blue light, such as a yellow dye. The process of forming the light absorbing layer 141 may be a printing process, a yellow light process, or the like.
As shown in fig. 3e, the first distributed bragg reflector layer 142 is formed in the second sub-channel a2 accommodating the light absorbing layer 141, such that the color filter component 140 including the first distributed bragg reflector layer 142, the second distributed bragg reflector layer 143 and the light absorbing layer 141 is provided in a portion of the second sub-channel a2, wherein the light absorbing layer 14 is sandwiched between the first distributed bragg reflector layer 142 and the second distributed bragg reflector layer 143.
The process of forming the first distributed bragg reflector layer 142 may be a physical vapor deposition, chemical vapor deposition, or the like. The first distributed bragg reflector 142 may be configured to allow red light and blue light to pass therethrough and reflect blue light.
As shown in fig. 3f, the first sub-layer 121 is formed on a side of the second sub-layer 122 facing away from the substrate 190. The first sub-layer 121 is a sub-layer of the black matrix layer 120. The first sublayer 121 includes a plurality of first sub-channels a1 arranged in an array, each first sub-channel a1 having opposite first openings K1 and second openings K2, wherein the second openings K2 face the substrate 190. The plurality of first sub-channels a1 of the first sub-layer 121 and the plurality of second sub-channels a2 of the second sub-layer 122 are respectively and correspondingly communicated to form a plurality of channels AS, wherein the second opening K2 of the first sub-channel a1 is in butt joint with the third opening K3 of the second sub-channel a 2.
Processes of forming the first sub-layer 121 include film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, and the like.
In addition, the reflective layer 180 may be formed on at least a portion of the inner wall of the first sub-passage a 1. The process of forming the reflective layer 180 may be physical vapor deposition, chemical vapor deposition, etc., and the reflective layer 180 may be a film layer of a high reflective material plated on the inner wall of the first sub-passage a1, wherein the reflective material includes, but is not limited to, a metal material such as silver, aluminum, etc.
Referring to fig. 3g, a transmissive layer 150 is formed in a first sub-channel a1 corresponding to the second sub-channel a2 accommodating the antireflection film 160 and the transmissive layer 150. The process of forming the transmissive layer 150 may be a printing process, a yellow light process, or the like. Scattering particles may be mixed in the transmissive layer 150.
As shown in fig. 3h and 3i, the color conversion layer 130 is formed in the first sub-channel a1 corresponding to the second sub-channel a2 accommodating the color filter assembly 140. Color conversion layer 130 may be a quantum dot layer, and may be formed within channel 121 by a printing process, a yellow light process, or the like.
As shown in fig. 3j, a third distributed bragg reflector layer 170 is formed at the first opening K1 of at least a portion of the first sub-channel a 1. The process of forming the third distributed bragg reflector layer 170 may be physical vapor deposition, chemical vapor deposition, or the like. The third distributed bragg reflector layer 170 may be configured to allow the blue light to transmit therethrough and reflect the red light and the blue light.
As shown in fig. 3k, a planarization layer 110 is formed on the side of the first sub-layer 121 facing away from the substrate 190. The planarization layer 110 may be made of an organic material, such as Cardo resin, polyimide resin, or acrylic resin.
Thus, the color conversion module 100 according to the embodiment of the present invention is obtained. According to the color conversion assembly 100 of the embodiment of the invention, the plurality of channels AS of the black matrix layer 120 may correspond to the plurality of sub-pixels of the display panel. The color conversion layer 130 is located in the first sub-channel a1, the light converted by the color conversion layer 130 needs to pass through the second sub-channel a2 of the corresponding channel AS and then propagate outwards rather than directly disperse around, that is, the second sub-channel a2 of the corresponding channel AS can converge the light converted by the color conversion layer 130 to a certain extent, and the light emitted from the channel AS is reduced from propagating to the area where the adjacent channel AS is located, so that the mutual crosstalk with the light emitted from the adjacent channel AS is reduced, and the cross color problem occurring between the channels AS corresponding to the adjacent sub-pixels is reduced.
The second sub-channel a2 of the channel AS containing the color conversion layer 130 may be provided with a color filter assembly 140, which can prevent at least one color light other than the light converted by the color conversion layer 130 from propagating to the outside of the corresponding channel AS, thereby improving the purity of the emergent light of the channel AS and alleviating the problem of poor color gamut when displaying a picture.
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:
the black matrix layer comprises a first sublayer and a second sublayer which are arranged in a stacked mode, and the black matrix layer comprises a plurality of channels, wherein each channel comprises a first sub-channel penetrating through the first sublayer and a second sub-channel penetrating through the second sublayer and communicated with the first sub-channel;
a color conversion layer located within at least a portion of the first sub-channels of the channel, the color conversion layer capable of converting incident light into light of a target color; and
a color filter assembly disposed in correspondence to the channel housing the color conversion layer, wherein at least a portion of the color filter assembly is located in the second sub-channel in correspondence to the channel, the color filter assembly configured to allow light converted by the color conversion layer in correspondence to the channel to pass therethrough and to block light of at least one other wavelength range from passing therethrough.
2. The color conversion assembly of claim 1, wherein each of the first sub-channels comprises a first opening and a second opening opposite in a thickness direction of the color conversion assembly, wherein the second opening is adjacent to the second sub-channel, at least a portion of an inner wall of each of the first sub-channels is obliquely disposed with respect to an interface of the first sub-layer and the second sub-layer, and a size of the second opening is larger than a size of the first opening;
and/or each second sub-channel comprises a third opening and a fourth opening which are opposite in the thickness direction of the color conversion assembly, wherein the third opening is close to the first sub-channel, at least part of the inner wall of each second sub-channel is obliquely arranged relative to the interface of the first sub-layer and the second sub-layer, and the size of the fourth opening is smaller than that of the third opening.
3. The color conversion assembly of claim 1, wherein the color filter assembly comprises:
a light absorbing layer within the second sub-channel of the channel housing the color conversion layer, the light absorbing layer capable of absorbing light in the same wavelength range as the incident light.
4. The color conversion assembly of claim 3, wherein the color filter assembly further comprises:
a first distributed Bragg reflector layer located between the color conversion layer and the light absorption layer, wherein the first distributed Bragg reflector layer is configured to allow the light converted by the color conversion layer in the corresponding channel to pass through and reflect the light in at least one other wavelength range;
and/or, the color filter assembly further includes:
and the second distributed Bragg reflection layer is positioned on the side, away from the color conversion layer, of the light absorption layer, and is configured to allow the light converted by the color conversion layer in the corresponding channel to pass through and reflect the light in at least one other wavelength range.
5. The color conversion assembly according to any one of claims 1 to 4, further comprising:
a transmissive layer in at least a portion 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;
preferably, scattering particles are mixed in the transmissive layer.
6. The color conversion assembly of claim 5, further comprising:
and the antireflection film is positioned on one side of the transmission layer, which is opposite to the light incidence side.
7. The color conversion assembly of claim 2, further comprising:
a third distributed Bragg reflector layer located in the first opening of at least a portion of the first sub-channel, the third distributed Bragg reflector layer 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.
8. The color conversion assembly according to any one of claims 1 to 4, further comprising:
and the reflecting layer is positioned on at least part of the inner wall of the channel.
9. A display panel, comprising:
a light emitting substrate including a plurality of light emitting cells; and a color conversion assembly according to any one of claims 1 to 8,
the color conversion layer in the color conversion assembly is arranged on the light emitting side of the light emitting substrate, and a plurality of channels of the color conversion assembly correspond to the plurality of light emitting units respectively.
10. A display device characterized by comprising the display panel according to claim 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620222.6A CN112213879B (en) | 2019-07-10 | 2019-07-10 | Color conversion assembly, display panel and display device |
| KR1020227001323A KR20220012995A (en) | 2019-07-10 | 2020-03-18 | Color Conversion Assemblies, Display Panels, and Display Units |
| PCT/CN2020/080011 WO2021004086A1 (en) | 2019-07-10 | 2020-03-18 | Color conversion assembly, display panel, and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620222.6A CN112213879B (en) | 2019-07-10 | 2019-07-10 | Color conversion assembly, display panel and display device |
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| Publication Number | Publication Date |
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| CN112213879A true CN112213879A (en) | 2021-01-12 |
| CN112213879B CN112213879B (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910620222.6A Active CN112213879B (en) | 2019-07-10 | 2019-07-10 | Color conversion assembly, display panel and display device |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20220012995A (en) |
| CN (1) | CN112213879B (en) |
| WO (1) | WO2021004086A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12074263B2 (en) | 2021-04-30 | 2024-08-27 | Samsung Display Co., Ltd. | Display element with novel reflectors |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102534437B1 (en) * | 2021-02-10 | 2023-05-22 | 한국전자기술연구원 | Quantum dot color filter structure and Display device having the same |
| WO2023033201A1 (en) * | 2021-08-31 | 2023-03-09 | 엘지전자 주식회사 | Display panel and image display device comprising same |
| CN114420718A (en) * | 2022-02-08 | 2022-04-29 | 厦门天马微电子有限公司 | Display panel and display device |
| CN115411160B (en) * | 2022-11-03 | 2023-02-03 | 江西兆驰半导体有限公司 | Full-color Micro-LED chip and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112213879B (en) | 2021-09-03 |
| WO2021004086A1 (en) | 2021-01-14 |
| KR20220012995A (en) | 2022-02-04 |
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