KR20210157401A - Color Conversion Assembly and Display Panel - Google Patents

Abstract

The color conversion assembly 100 and the display panel may improve the display effect by improving the utilization rate of light energy and improving the uniformity of light emitted after conversion. The color conversion assembly includes a black matrix 120 , a color conversion layer 130 , and a light conversion layer CL including a lens 140 , and the black matrix 120 includes a plurality of channels 121 arranged in an array. is provided, and the color conversion layer 130 is located in at least some channels 121 and the color conversion layer 130 can convert the incident light ray L1 into light of a wavelength range different from that of the incident light ray L1, The lens 140 is disposed in each channel 121 , wherein, in the channel 121 in which the color conversion layer 130 is accommodated, the lens 140 is located on the light incident side of the color conversion layer 130 .

Description

Color Conversion Assembly and Display Panel

This application claims the priority of the Chinese patent application filed on June 28, 2019 with the application number 201910580212.4 and the title of the invention "Color Conversion Assembly and Display Panel", all contents of the application are incorporated herein by reference.

TECHNICAL FIELD The present application relates to the field of displays, and more particularly, to a color conversion assembly and a display panel.

Flat panel displays, such as liquid crystal display (LCD) devices, organic light emitting diode (OLED) displays, and display devices using light emitting diode (LED) devices, have high image quality and consume less power. Because it has the advantages of saving money, thin body, and wide application range, it is widely applied to various consumer electronic products such as mobile phones, televisions, personal information terminals, digital cameras, notebook computers, desktop computers, etc., and the mainstream of display devices is became

A display device implements display of a color pattern through various colorization methods, for example, by adding one layer of a color film on a light emitting substrate to realize colorization. However, when the light intensity of the light source is non-uniform, the intensity of the light emitted after passing through the color film is still non-uniform, thereby affecting the display effect.

The present application provides a color conversion assembly and a display panel to improve the uniformity of the intensity of light of a ray emitted from the color conversion assembly, thereby improving a display effect.

In one aspect, an embodiment of the present application provides a color conversion assembly, wherein the color conversion assembly includes a black matrix, a color conversion layer, and a light conversion layer including a lens, wherein the black matrix includes a plurality of arrays arranged in an array. channels, wherein the color converting layer is located within at least some of the channels and the color converting layer is capable of converting the incident light rays into light rays having a wavelength range different from the incident light rays, and a lens is disposed within each channel, wherein the color converting layer In the received channel, the lens is located on the light incident side of the color converting layer.

According to the color conversion assembly of the present embodiment, a lens is disposed in each channel, wherein the lens is located on the light incident side of the color conversion layer. When the incident light ray generated from the light source enters the channel, the lens can equalize the incident light beam and converge, and the more uniform incident light beam enters the color conversion layer to perform excitation and conversion, so the utilization rate of light energy and to improve the uniformity of the light emitted after being converted, it is possible to improve the display effect.

According to the above embodiment of one aspect of the present application, the lens is a Fresnel lens, and in the channel in which the color converting layer is accommodated, the screw surface of the Fresnel lens is disposed toward the color converting layer.

Since the lens is a Fresnel lens, the uniformity and convergence performance of the incident light are ensured, and the occupied volume in the thickness direction is reduced, thereby reducing the thickness of the color conversion assembly and making it thinner.

According to any of the above embodiments of one aspect of the present application, each lens is disposed in the same layer.

According to any one of the above embodiments of one aspect of the present application, each channel has opposing first and second apertures, the size of the second aperture exceeding the size of the first aperture, and wherein the lens comprises the first aperture placed in close proximity to

According to any one of the above embodiments of one aspect of the present application, the inner wall of at least some of the channels is a curved inner wall.

According to any one of the above embodiments of one aspect of the present application, at least a portion of the inner wall of the channel is a spherical inner wall.

Since the inner wall of at least some channels is a curved inner wall, the intensity of light in the channel may be more uniform, the uniformity of the emitted light may be further improved, and the display effect may be improved.

According to any one of the above embodiments of the one aspect of the present application, the light conversion layer further includes a reflective layer positioned on the inner wall of the channel.

The color conversion assembly further includes a reflective layer positioned on the inner wall of the channel, wherein when the inner wall of the channel is a curved inner wall, the reflective layer forms a concave structure. The reflective layer with the concave structure can collimate and further homogenize the light beam in the channel, on the one hand, it can improve the utilization rate of light energy and further improve the display effect, on the other hand, the light beam within the channel By allowing convergence, rays in a channel are prevented from propagating to adjacent channels, and the problem of ray crosstalk between channels is improved.

According to any one of the above embodiments of the one aspect of the present application, the color conversion assembly further includes a first distributed Bragg reflective film disposed to correspond to each channel in a one-to-one correspondence, and the first distributed Bragg reflective film is a lens of the lens. Located on the light incident side, the first distributed Bragg reflective film is arranged to allow transmission of light in the same wavelength range as the incident light beam.

The first distributed Bragg reflective film is located on the light incident side of the lens, ie, between the light source and the color converting layer. The first distributed Bragg reflective film allows incident light rays to enter the channel and also reflects light rays of other colors that have already been converted in the channel so that all converted light rays are uniformly irradiated to the light exit side opposite the light source. Thus, the utilization rate of light energy is improved.

According to any one of the above embodiments of the one aspect of the present application, the color conversion assembly further includes a second distributed Bragg reflective film disposed to correspond to the color conversion layer in a one-to-one correspondence, and the second distributed Bragg reflective film has a color On one side of the conversion layer away from the lens, a second distributed Bragg reflective film is arranged to allow transmission of light rays emitted by the color conversion layer in a corresponding channel.

The second distributed Bragg reflective film is located on one side away from the lens of the color converting layer, ie, one side close to the exit light of the color converting assembly. The second distributed Bragg reflective film permits transmission of light emitted from the color conversion layer in the corresponding channel and reflects light in at least one other wavelength range to further improve the purity of light emitted from the corresponding channel. high, and when the second distributed Bragg reflective film reflects the incident light beam, the utilization rate of light energy may be improved.

According to any one of the above embodiments of one aspect of the present application, the color converting assembly further comprises a transmissive layer correspondingly disposed in a channel in which the color converting layer is not received, wherein, in the channel in which the transmissive layer is received, a lens is located on the light incident side of the transmission layer.

According to any one of the embodiments of the one aspect of the present application, the color conversion assembly further includes an evaporative membrane, the evaporative membrane is disposed to correspond to the transmission layer one-to-one, and the evaporative membrane is located on one side away from the lens of the transmission layer.

According to any one of the above embodiments of one aspect of the present application, the vapor deposition film and the second distributed Bragg reflective film are disposed on the same layer.

According to any one of the above embodiments of one aspect of the present application, the incident light ray may be a blue light ray, the color converting layer in some channels may emit a red light light, and the color converting layer in some channels may emit a green light light. .

According to any one of the above embodiments of one aspect of the present application, the color conversion layer is a quantum dot layer or a fluorescent particle layer.

According to any one of the above embodiments of the one aspect of the present application, the color conversion assembly further includes a first substrate positioned on a light incident side of the black matrix.

According to any one of the above embodiments of the one aspect of the present application, the color conversion assembly further includes a second substrate positioned on a side away from the first substrate of the black matrix, wherein the second substrate and the first substrate are jointly plural. sealing the channel, and the color conversion layer is located between the first substrate and the second substrate.

In another aspect, an embodiment of the present application provides a display panel, the display panel comprising: a light emitting substrate having a light emitting surface and including a plurality of light emitting units arranged in an array; and the color conversion assembly of any one of the above embodiments positioned on the light emitting surface of the light emitting substrate, wherein each channel and at least one light emitting unit are disposed to correspond to each other.

In any of the above embodiments of the other aspects of the present application, the light emitting unit is a Micro-LED light emitting unit.

In any one of the above other aspects of the present application, the display panel further includes a planarization layer disposed between the light emitting surface of the light emitting substrate and the first substrate of the color conversion assembly.

The present application provides a color conversion assembly and a display panel to improve the uniformity of the intensity of light of a ray emitted from the color conversion assembly, thereby improving a display effect.

Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of the non-limiting examples with reference to the accompanying drawings, wherein the same or like reference signs denote the same or like features, The drawings are not drawn to scale.
1 is a schematic top view of a color conversion assembly provided in an embodiment of the present application.
FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. 1 .
3 is a schematic top view of a lens of a color conversion assembly provided in an embodiment of the present application.
4 is a schematic cross-sectional view taken along line BB of FIG. 3 .
5 is a schematic diagram of a cross-sectional structure of a display panel provided according to an exemplary embodiment of the present disclosure.
6A to 6H are cross-sectional schematic views of a manufacturing process of a color conversion assembly provided in an embodiment of the present application.

In order to make the object, technical solution and advantages of the present application more clear, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the present application, and not to limit the present application. A person skilled in the art may practice some of these specific details herein without necessity.

Relational terms such as “first”, “secondary”, etc. are used only to distinguish one entity or operation from another, and do not necessarily require or imply that an actual relationship or order exists between such entities or operations. it is not

An embodiment of the present disclosure provides a color conversion assembly that can be applied to a display panel, and is used to realize colorization of light rays emitted from the display panel. Here, the display panel may be a display panel using a light emitting diode (LED) device, for example, a micro-LED display panel, and in some embodiments, an organic light emitting diode (OLED) display panel. It may be a display panel such as a Light Emitting Diode (OLED) display panel or a Liquid Crystal Display (LCD) panel.

In the present application, in most embodiments, the display panel will be described as a display panel using an LED device as an example. Here, the LED emits monochromatic light, and the color conversion assembly converts the monochromatic light into light rays of multiple colors for display.

1 is a schematic top view of a color conversion assembly provided in an embodiment of the present application, wherein FIG. 1 shows the structure of a partial region of the color conversion assembly. The color conversion assembly 100 includes a plurality of color conversion units CU arranged in an array, and in FIG. 1 , a boundary line between the plurality of color conversion units CU is indicated by a dotted line. When the color conversion assembly 100 is used in a display panel, the plurality of color conversion units CU and the plurality of pixels of the display panel correspond to each other.

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1 . The color conversion assembly 100 includes a light conversion layer CL, and the light conversion layer CL includes a black matrix (BM) 120 , a color conversion layer 130 , and a lens 140 . .

The black matrix 120 includes a plurality of channels 121 arranged in an array. The black matrix 120 may be made of a black light absorbing material, and may be a black pigment or a colorant of a dye. In some embodiments, the manufacturing material of the black matrix 120 may be, for example, titanium black, lignin black, a complex oxide pigment such as iron or manganese, and a combination of the pigments.

The color conversion layer 130 is located in at least some of the channels 121 , where the color conversion layer 130 may convert the incident light ray L1 into light of a wavelength range different from that of the incident light ray L1 .

In this embodiment, the incident light ray L1 is irradiated to the plurality of channels 121 of the black matrix 120 from, for example, the lower portion of the black matrix 120 .

The color conversion layer 130 may have a layer structure that implements color conversion through light filtration or may be a color conversion layer including a photoluminescence material, where the photoluminescence material may be a quantum dot layer, a fluorescent particle layer, or the like. have. In this embodiment, it will be described as an example that the color conversion layer is a quantum dot layer.

The quantum dot layer may be made of a quantum dot material capable of forming a specific excitation wavelength, and the quantum dot material has an outer shell of zinc sulfide (ZnS), and a core of cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS), indium phosphide (InP), one or more types of quantum dot materials of perovskite, but is not limited thereto, and the quantum dot material is, for example, titanium oxide or silicon dioxide, etc. include

In some embodiments, the incident light ray L1 may be a blue light ray, and the color conversion layer 130 is located in at least some of the channels 121 , for example, in FIG. 2 , the left channel 121 and the middle channel. Each of the color conversion layers 130 is accommodated in 121 . The color conversion layer 130 in some channels 121 may obtain red light by conversion, for example, in FIG. 2 , the color conversion layer 130 in the left channel 121 is a red quantum dot layer, After absorbing the incident ray L1 of blue light, it is converted into red light and emitted to the outside. The color conversion layer 130 in some channels 121 may obtain a green light ray by conversion, for example, in FIG. 2 , the color conversion layer 130 in the intermediate channel 121 is a green quantum dot layer, After absorbing the incident ray L1 of blue light, it is converted into green light and emitted to the outside.

The method of converting the color of the incident light ray L1 and the color conversion layer 130 is only an example, and in some other embodiments, other methods may be used. For example, in some embodiments, the incident light ray L1 may be ultraviolet (UV) light. For example, in some embodiments, the color conversion layer 130 is accommodated in all of the channels 121 , wherein the color conversion layer 130 in some channels 121 converts the incident light ray L1 into red. It is a quantum dot layer that converts light rays, the color conversion layer 130 in some channels 121 is a quantum dot layer that converts the incident light ray L1 into green light rays, and the color conversion layer 130 in some channels 121 is incident It is a quantum dot layer that converts light L1 into blue light. In addition, the color conversion layer 130 is not limited to converting the incident light ray L1 into red, green, and blue light rays, and in some other embodiments, the color conversion layer 130 in some channels 121 is incident It may be a quantum dot layer that converts the light ray L1 into a yellow light ray, a cyan light ray, or the like.

The color conversion assembly 100 of the present embodiment further includes a lens 140 , and the lens 140 is disposed in each channel 121 . Here, in the channel 121 in which the color conversion layer 130 is accommodated, the lens 140 is located on the light incident side of the color conversion layer 130 .

According to the color conversion assembly 100 of the present embodiment, a lens 140 is disposed in each channel 121 , wherein the lens 140 is located on the light incident side of the color conversion layer 130 . When the incident light ray L1 generated from the light source enters the channel 121, the lens 140 can uniformly converge the incident light ray L1, so that the more uniform incident light ray L1 forms the color conversion layer ( 130) to perform excitation and conversion, thereby improving the utilization rate of light energy, and improving the uniformity of light emitted after conversion, thereby improving the display effect.

3 is a schematic top view of a lens of a color conversion assembly provided in an embodiment of the present application, and FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3 . In some embodiments, since the lens 140 may be a Fresnel lens, the uniformity and convergence performance of the incident light ray L1 are ensured, and the occupied volume in the thickness direction is reduced, and the color conversion assembly 100 of the Reduce the thickness to make it thinner. In some embodiments, the light source for generating the incident light beam L1 is a Micro-LED, and correspondingly, the focal length and period distribution of the Fresnel lens may be optimized according to the light emission characteristics of the Micro-LED.

In some embodiments, a Fresnel lens has two opposing surfaces, one surface being planar and the other surface being threaded. In the present application, the screw surface of the Fresnel lens refers to a surface having a plurality of concentric ring-shaped structures.

In some embodiments, in the channel 121 in which the color conversion layer 130 is accommodated, the screw surface of the Fresnel lens is disposed toward the color conversion layer 130 , so that the color conversion layer 130 is a Fresnel lens. It is possible to close the screw surface of the ray and prevent some gaps between the two from affecting the propagation effect of the light beam.

In some embodiments, each lens 140 is disposed on the same layer.

As shown in FIG. 2 , in this embodiment, each channel 121 has a first opening OP1 and a second opening OP2 opposite to each other, and the size of the second opening OP2 is the first Exceeding the size of the opening OP1, the lens 140 is disposed at a position close to the first opening OP1 to collimate the light rays in the channel 121 to be irradiated to the outside from the second opening OP2. Therefore, the display effect can be improved. In the present application, when the lens 140 is disposed at a position close to the first opening OP1 , the distance between the lens 140 and the first opening OP1 is the distance between the lens 140 and the second opening OP2 . indicates less than the distance.

The light conversion layer CL of the color conversion assembly 100 may further include a reflective layer 150 , and the reflective layer 150 is positioned on an inner wall of the channel 121 . In some embodiments, the reflective layer 150 may be a film layer of a highly reflective material applied to the inner wall of the channel 121 , wherein the reflective material includes, but is not limited to, a metallic material such as silver or aluminum. Through the arrangement of the reflective layer 150 , it is possible to reduce the propagation of light rays in the channel 121 to the adjacent channels 121 , and the problem of light beam crosstalk between the channels 121 is improved.

Optionally, since the inner wall of at least some of the channels 121 is a curved inner wall, the intensity of light in the channel 121 may be more uniform and the uniformity of the emitted light may be further improved, thereby improving the display effect.

Optionally, the inner wall of the channel 121 is a spherical inner wall, that is, a curved inner wall including a partial spherical surface, so that the reflective layer 150 forms a concave structure. The reflective layer 150 having a concave structure can collimate and further homogenize the light rays in the channel 121, on the one hand, to improve the utilization rate of light energy and further improve the display effect, on the other hand As a result, the ray converges in the channel 121 , preventing the ray in the channel 121 from being transmitted to the adjacent adjacent channel 121 , and improving the ray crosstalk problem between the channels 121 .

Optionally, the color conversion assembly 100 may further include a first distributed Bragg reflective film 161 disposed to correspond to at least some channels 121 . In the present embodiment, the first distributed Bragg reflective film 161 and each channel 121 are disposed to correspond to each other. In some embodiments, the first distributed Bragg reflective film 161 is disposed within the channel 121 . In some other embodiments, the first distributed Bragg reflective film 161 may be disposed outside the channel 121 .

The first distributed Bragg reflective film 161 is positioned on the light incident side of the lens 140 . When the incident light ray L1 is irradiated to the color conversion assembly 100 , it sequentially passes through the first distributed Bragg reflective film 161 and the lens 140 and is incident on the color conversion layer 130 .

The first distributed Bragg reflective film 161 may be formed by stacking two types of thin films of high refractive index and low refractive index, and the combination of the two types of thin films is a TiO ₂ thin film, an Al ₂ O ₃ thin film, and a TiO ₂ thin film. and SiO ₂ thin film, Ta ₂ O ₅ thin film and Al ₂ O ₃ thin film, HfO ₂ thin film, and SiO ₂ thin film, but are not limited thereto. The former is a high refractive index thin film, and the latter is a low refractive index thin film.

The first distributed Bragg reflective film 161 is arranged to allow transmission of light in the same wavelength range as the incident light ray L1, and in some embodiments, the first distributed Bragg reflective film 161 is also simultaneously other arranged to reflect light in at least one kind of wavelength range.

The first distributed Bragg reflective film 161 is positioned on the light incident side of the lens 140 , that is, positioned between the light source and the color conversion layer 130 . The first distributed Bragg reflective film 161 allows the incident light ray L1 to enter into the channel 121 and also reflects other colored light rays that have already been converted within the channel 121 so that the converted light rays are all light sources. to be uniformly irradiated to the light emitting side opposite to the

Optionally, the color conversion assembly 100 may further include a second distributed Bragg reflective film 162 , wherein the second distributed Bragg reflective film 162 is a channel 121 in which the color conversion layer 130 is accommodated. placed corresponding to In some embodiments, the second distributed Bragg reflective film 162 and the color conversion layer 130 are disposed to correspond one-to-one. The second distributed Bragg reflective film 162 is positioned on one side of the color conversion layer 130 away from the lens 140 . The light ray converted by the color conversion layer 130 is irradiated to the outside after passing through the second distributed Bragg reflective film 162 .

The second distributed Bragg reflective film 162 may be formed by stacking two types of thin films of high refractive index and low refractive index, and the combination of the two types of thin films is a TiO ₂ thin film, an Al ₂ O ₃ thin film, and a TiO ₂ thin film. and SiO ₂ thin film, Ta ₂ O ₅ thin film and Al ₂ O ₃ thin film, HfO ₂ thin film, and SiO ₂ thin film, but are not limited thereto. The former is a high refractive index thin film, and the latter is a low refractive index thin film.

The second distributed Bragg reflective film 162 is arranged to allow transmission of light rays emitted from the color converting layer 130 in the corresponding channel 121 , and in some embodiments, the second distributed Bragg reflective film 162 162) is also arranged to reflect light rays of at least one other wavelength range at the same time. In some embodiments, the second distributed Bragg reflective film 162 may be disposed to reflect light in the same wavelength range as the incident light ray L1 , and thus the incident light ray L1 that is not absorbed by the color conversion layer 130 . ) is reflected back to the color conversion layer 130 to perform excitation and conversion.

The second distributed Bragg reflective film 162 is located on one side away from the lens 140 of the color conversion layer 130 , that is, in some embodiments, one side that is close to the exit light of the color conversion assembly 100 . is located in The second distributed Bragg reflective film 162 permits transmission of light emitted from the color conversion layer 130 in the corresponding channel 121 and reflects light in at least one type of wavelength range to correspond The purity of the light ray emitted from the channel 121 is further increased, and when the second distributed Bragg reflective film 162 reflects the incident light ray L1 , the utilization rate of light energy may be improved.

Optionally, the color conversion assembly 100 further includes a transmissive layer 170 . The transmission layer 170 is located in the channel 121 in which the color conversion layer 130 is not disposed among the plurality of channels 121 , and the transmission layer 170 transmits light in the same wavelength range as the incident light beam L1 . . The transmission layer 170 may be a transparent rubber layer.

As shown in FIG. 2 , in the present embodiment, the transmission layer 170 is accommodated in the right channel 121 . The incident light L1 is a blue light, the transmission layer 170 transmits the blue light, and the emitted light of the corresponding channel is the blue light. In FIG. 2 , the light emitted from the left channel 121 is red, the light emitted from the middle channel 121 is green, and the light emitted from the right channel 121 is blue, and the channel 121 that emits red light is green light. The channel 121 for emitting light and the channel 121 for emitting blue light are arranged in an array to realize a full-color display of the screen.

In the channel 121 in which the transmission layer 170 is accommodated, the lens 140 is positioned on the light incident side of the transmission layer 170 . When the incident light ray L1 generated from the light source enters the channel 121 , the lens 140 may uniformly converge the incident light ray L1 and pass through the channel 121 in which the transmission layer 170 is accommodated. In order to improve the degree of uniformity of the emitted light rays after the process, the display effect can be improved.

Optionally, the color conversion assembly 100 may further include an evaporative film 180 , which is disposed to correspond to the channel 121 in which the transmission layer 170 is accommodated. In some embodiments, the vapor deposition film 180 and the transmission layer 170 are disposed to correspond one-to-one. The vapor deposition film 180 is located on one side of the transmission layer 170 away from the lens 140 . In this embodiment, the incident light ray L1 may be a blue light ray, and the vapor deposition film 180 may be a blue light vapor deposition film.

Optionally, the first distributed Bragg reflective film 161 of the color conversion assembly 100 is disposed to correspond to each channel 121 . When the incident light ray L1 is a blue light ray, the first distributed Bragg reflective film 161 in the channel 121 in which the red quantum dot layer is accommodated may be arranged to allow transmission of the blue light and reflect the red light. The first distributed Bragg reflective film 161 in the channel 121 in which the green quantum dot layer is accommodated may be arranged to allow transmission of blue light and also reflect green light. The first distributed Bragg reflective film 161 in the channel 121 in which the transmission layer 170 is accommodated may be disposed to allow transmission of blue light.

Optionally, the first distributed Bragg reflective film 161 in the channel 121 corresponding to the various types of emitted rays of the color conversion assembly 100 may be shared. For example, the first distributed Bragg reflective film 161 disposed in the channel 121 in which the red quantum dot layer is accommodated, in the channel 121 in which the green quantum dot layer is accommodated, and in the channel 121 in which the transmission layer 170 is accommodated, respectively. ) may be the same kind of distributed Bragg reflective film, which may be arranged to allow transmission of blue light and reflect red and green light.

The second distributed Bragg reflective film 162 is disposed to correspond to the channel 121 in which the color conversion layer 130 is accommodated. In some embodiments, when the incident light ray L1 is a blue light, the second distributed Bragg reflective film 162 corresponding to the channel 121 in which the red quantum dot layer is accommodated permits transmission of the red light and also the blue light. The second distributed Bragg reflective film 162 corresponding to the channel 121 in which the green quantum dot layer is accommodated may be disposed to reflect the green quantum dot layer, and may be disposed to allow transmission of green light and also reflect blue light.

Optionally, the second distributed Bragg reflective film 162 in the channel 121 corresponding to the various types of emitted rays of the color conversion assembly 100 may be shared. For example, the second distributed Bragg reflective film 162 disposed in the channel 121 in which the red quantum dot layer is accommodated and the channel 121 in which the green quantum dot layer is accommodated, respectively, may be the same type of distributed Bragg reflective film. The bar may be arranged to allow transmission of red and green light and also reflect blue light.

Optionally, the vapor deposition film 180 may be disposed on the same layer as the second distributed Bragg reflective film 162 .

Optionally, the color conversion assembly 100 may further include a first substrate 110 , the first substrate 110 being positioned on the light incident side of the black matrix 120 . The material of the first substrate 110 may be glass or a polymer material, and an optional polymer material among them is, for example, polycarbonate, polyvinyl chloride, polyester, acrylic resin, or the like.

As shown in FIG. 2 , in the present embodiment, each channel 121 has a first opening OP1 and a second opening OP2 that are opposed to each other, and the first opening OP1 is connected to the first substrate ( Close to 110 , the second opening OP2 is farther from the first substrate 110 . The incident light beam L1 may be irradiated to the plurality of channels 121 from the lower portion of the first substrate 110 .

The color conversion assembly 100 may further include a second substrate 190 , and the second substrate 190 is positioned on one side of the black matrix 120 away from the first substrate 110 . The second substrate 190 and the first substrate 110 jointly seal the plurality of channels 121 , and the color conversion layer 130 is positioned between the first substrate 110 and the second substrate 190 . .

The material of the second substrate 190 may be glass or a polymer material, and an optional polymer material among them is, for example, polycarbonate, polyvinyl chloride, polyester, acrylic resin, or the like. In some embodiments, the second substrate 190 may be bonded to the black matrix 120 through an adhesive and cover the plurality of channels 121 , and at the same time, the second substrate 190 may be connected to the channels 121 . Covers the second distributed Bragg reflective film 162 and the vapor deposition film 180 disposed to correspond to . The adhesive can be a high transmittance optical adhesive material, for example, a thermosetting or UV curable material and a liquid optically clear adhesive, and can not only ensure good transmittance of light, but also exert the effect of equalizing light. have.

The color conversion assembly 100 of the present embodiment may be applied to a display panel, and is used for colorized display of the display panel.

Embodiments of the present application also provide a display panel including a light emitting substrate and a color conversion assembly, wherein the color conversion assembly of the display panel may be the color conversion assembly 100 of any one embodiment of the present application.

5 is a schematic cross-sectional structure of a display panel provided according to an exemplary embodiment of the present disclosure. The display panel 1000 includes the light emitting substrate 200 and the color conversion assembly 100 of the above embodiment.

The light emitting substrate 200 includes a light emitting surface 200a, and the light emitting substrate 200 includes a plurality of light emitting units 210 arranged in an array. In this 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 each LED light emitting units, and are arrayed on the light emitting surface 200a. The LED light emitting unit may be a monochromatic LED light emitting unit, so 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 light LED light emitting unit. In some embodiments, the light emitting unit 210 is a Micro-LED light emitting unit.

The light emitting substrate 200 is not limited to a light emitting substrate using an LED device. In some other embodiments, the light emitting substrate 200 may be a light emitting substrate for an OLED display panel or a light emitting substrate for an LCD, that is, the light emitting substrate 200 includes at least some functional layers of the OLED display panel, and the color An OLED display panel may be obtained through combination with the conversion assembly 100 , or the light emitting substrate 200 includes at least some functional layers of the LCD, and an LCD may be obtained through combination with the color conversion assembly 100 . can

Although the light emitting substrate 200 is a light emitting substrate using an LED device, the light emitting unit 210 is not limited to a blue light LED light emitting unit, for example, in an alternative embodiment, the light emitting unit 210 is an ultraviolet LED light emitting unit can be

The color conversion assembly 100 is positioned on the light emitting surface 200a of the light emitting substrate 200 , wherein each channel 121 is disposed to correspond to at least one light emitting unit 210 . In this embodiment, the plurality of light emitting units 210 are all blue light LED light emitting units. In the left channel 121 of FIG. 5 , the light emitted from the blue light LED light emitting unit excites the color conversion layer 120 so that the light is converted into red light and emitted to the outside. In the intermediate channel 121 of FIG. 5 , the light emitted from the blue light LED light emitting unit excites the color conversion layer 120 so that the light is converted into green light and emitted to the outside. In the right channel 121 of FIG. 5 , blue light emitted from the blue light LED light emitting unit passes through the transmission layer 160 to emit blue light to the outside. The channel 121 emitting the red light, the channel 121 emitting the green light and the channel 121 emitting the blue light are arranged in an array, so that a full-color display of the screen can be realized.

In the present embodiment, the display panel 1000 may further include a planarization layer 300 , the planarization layer 300 comprising the light emitting surface 200a of the light emitting substrate 200 and the second of the color conversion assembly 100 . 1 is disposed between the substrates 110 . The planarization layer 300 is made of an organic material, for example, Cardo resin, polyimide resin, acrylic resin, or the like. The planarization layer 300 may improve the flatness of the surface of the light emitting substrate 200 to facilitate alignment with the color conversion assembly 100 . In some embodiments, the thickness of the planarization layer 300 is greater than or equal to the height of the light emitting unit 210 protruding with respect to the light emitting surface 200a.

According to the display panel 1000 of the present embodiment, a lens 140 is disposed in each channel 121 of the color conversion assembly 100 , and the lens 140 is located on the light incident side of the color conversion layer 130 . do. When the incident light ray generated from the light emitting unit 210 enters the channel 121 , the lens 140 may uniformly converge the incident light ray, and the more uniform incident light ray enters the color conversion layer 130 , Since excitation and conversion can be performed, the utilization rate of light energy can be improved, and the degree of uniformity of light emitted after conversion can be improved, thereby improving the display effect.

In some embodiments, the color conversion assembly 100 further comprises a reflective layer 150 positioned on an inner wall of the channel 121 , wherein the reflective layer 150 when the inner wall of the channel 121 is a curved inner wall. to form this concave structure. The reflective layer 150 having a concave structure can collimate and further homogenize the light rays in the channel 121, on the one hand, to improve the utilization rate of light energy and further improve the display effect, on the other hand , caused the light beam to converge within the channel 121 , preventing the light beam from the channel 121 from propagating to the adjacent channel 121 , and improved the light beam crosstalk problem between the channels 121 .

A process of forming the display panel 1000 including the color conversion assembly 100 may vary. The color conversion assembly 100 may be directly formed on the light emitting substrate 200 to form the display panel 1000 together with the light emitting substrate 200 . In some other embodiments, the color conversion assembly 100 may be separately manufactured, and may be combined with the light emitting substrate 200 in a transition manner to obtain the display panel 1000 .

Hereinafter, a manufacturing process of the color conversion assembly 100 of the above embodiment will be described.

6A to 6H are cross-sectional schematic views of a manufacturing process of a color conversion assembly provided in an embodiment of the present application.

As shown in FIG. 6A , a plurality of first distributed Bragg reflective films 161 arranged in an array are formed on the first substrate 110 , and the first distributed Bragg reflective films 161 are formed by the incident light beam L1 . ) and is arranged to allow transmission of light in the same wavelength range and to reflect light in at least one other wavelength range. The plurality of first distributed Bragg reflective films 161 are arranged to allow transmission of light in the same wavelength range as the incident light beam L1 and reflect light in at least one other wavelength range, and the plurality of first distribution The position of the Sick Bragg reflective film 161 corresponds to the positions of the plurality of color conversion units CU, that is, the positions of the plurality of pixels of the display panel.

The process of forming the first distributed Bragg reflective film 161 may be a physical vapor deposition method, a chemical vapor deposition method, etc., and the first distributed Bragg reflective film 161 allows transmission of blue light and also red light and It may be arranged to reflect a green light beam.

As shown in FIG. 6B , a lens 140 is formed on each of the first distributed Bragg reflective films 161 . The lens 140 may be a Fresnel lens, and the manufacturing method includes photolithography, rolling printing, or the like.

As shown in FIG. 6C , a black matrix 120 is formed on the first substrate 110 . The process of forming the black matrix 120 includes film adhesion, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, and the like. The black matrix 120 includes a plurality of array-arranged channels 121 having a patterned structure. Here, the first distributed Bragg reflective film 161 and the lens 140 are respectively positioned in the corresponding channel 121 .

As shown in FIG. 6D , the reflective layer 150 is formed on the inner wall of the channel 121 . The process of forming the reflective layer 150 may be a physical vapor deposition method, a chemical vapor deposition method, etc., and the reflective layer 150 may be a highly reflective material film layer applied to the inner wall of the channel 121, wherein the reflective material is silver , metal materials such as aluminum, but not limited thereto.

As shown in FIG. 6E , the color conversion layer 130 is formed in at least some of the channels 121 . In the present embodiment, the color conversion layer 130 is formed in some channels 121 , and the transmission layer 170 is formed in the remaining partial channels 121 . The color conversion layer 130 may be a quantum dot layer, and is formed in the channel 121 through a printing process or a yellow light photoresist process. The transmission layer 170 may be a transparent adhesive layer. In some embodiments, upper ends of the color conversion layer 130 and the transmission layer 170 are not higher than the openings of the upper ends of the corresponding channels 121 .

As shown in FIG. 6F , the vapor deposition film 180 is formed on the transmission layer 170 . The vapor deposition film 180 is, for example, a blue light vapor deposition film, and the vapor deposition film 180 is disposed to correspond to the channel 121 in which the transmission layer 170 is accommodated. The process of forming the vapor deposition film 180 may be a method such as physical vapor deposition, chemical vapor deposition, or the like.

As shown in FIG. 6G , a second distributed Bragg reflective film 162 is formed on the color conversion layer 130 . The second distributed Bragg reflective film 162 may be arranged to allow transmission of red and green light and also reflect blue light, in this embodiment, the second distributed Bragg reflective film 162 is each The color conversion layer 130 is disposed to correspond to the accommodated channel 121 . The process of forming the second distributed Bragg reflective film 162 may be a method such as physical vapor deposition or chemical vapor deposition.

As shown in FIG. 6H , a second substrate 190 is formed on the black matrix 120 . The second substrate 190 and the first substrate 110 jointly seal the plurality of channels 121 , and the color conversion layer 130 is positioned between the first substrate 110 and the second substrate 190 . .

The material of the second substrate 190 may be glass or a polymer material, and an optional polymer material among them is, for example, polycarbonate, polyvinyl chloride, polyester, acrylic resin, or the like. In some embodiments, the second substrate 190 may be bonded to the black matrix 120 through an adhesive and cover the plurality of channels 121 , and at the same time, the second substrate 190 may be connected to the channels 121 . Covers the second distributed Bragg reflective film 162 and the vapor deposition film 180 disposed to correspond to . The adhesive may be a high transmittance optical adhesive material, for example, a thermosetting or UV curable material and a liquid optical transparent adhesive, etc., which can ensure good transmittance of light, as well as exert the effect of equalizing light. have.

Accordingly, the color conversion assembly 100 of the present embodiment can be obtained. In the process of forming the color conversion assembly 100 , the color conversion assembly 100 may be separately manufactured, and may be combined with the light emitting substrate through a transition method when forming the display panel. In some other embodiments, first, the first substrate 110 of the color conversion assembly 100 is formed on the light emitting substrate of the display panel, and subsequent manufacturing steps are the same as the above-described manufacturing process, through which the color conversion assembly ( 100), a display panel can be obtained without the need for transitioning. Before forming the first substrate 110 on the light emitting surface of the light emitting substrate, a planarization layer may be formed in advance on the light emitting surface of the light emitting substrate. The planarization layer may improve the flatness of the surface of the light emitting substrate, and thus may facilitate alignment with the color conversion assembly 100 .

According to the above-described embodiments of the present application, these embodiments have not described all details in detail, and the present application is not limited to the specific embodiments described above. Of course, many modifications and variations are possible according to the above description. This specification has selected and specifically described these embodiments in order to better explain the principles and practical application of the present application, so that those skilled in the art may make best use of the present application and make modifications thereon. This application is limited only by the claims and their full scope and equivalents.

Claims (19)

A color conversion assembly comprising:
A light conversion layer comprising a black matrix, a color conversion layer, and a lens,
The black matrix has a plurality of channels arranged in an array,
The color conversion layer may be located in at least some of the plurality of channels, and the color conversion layer may convert an incident light beam into a light beam having a wavelength range different from that of the incident light beam,
and the lenses are respectively disposed in the plurality of channels, wherein, in the channel in which the color converting layer is received, the lens is located on a light incident side of the color converting layer. According to claim 1,
wherein the lens is a Fresnel lens, and a screw surface of the Fresnel lens is disposed toward the color conversion layer in a channel in which the color conversion layer is accommodated. According to claim 1,
and the lenses each disposed within the plurality of channels are disposed on the same layer. According to claim 1,
wherein the plurality of channels each have opposing first and second openings, wherein a size of the second opening exceeds a size of the first opening, and wherein the lens is disposed proximate to the first opening; color conversion assembly. According to claim 1,
and an inner wall of at least some of the plurality of channels is a curved inner wall. The method of claim 1,
and an inner wall of at least some of the plurality of channels is a spherical inner wall. According to claim 1,
The light converting layer further comprises a reflective layer positioned on the inner wall of the channel. The method of claim 1,
Further comprising a first distributed Bragg reflective film disposed to correspond to each of the channels in a one-to-one correspondence, wherein the first distributed Bragg reflective film is located on the light incident side of the lens, the first distributed Bragg reflective film , arranged to allow transmission of light in the same wavelength range as the incident light beam. According to claim 1,
and a second distributed Bragg reflective film disposed to correspond to the color conversion layer in a one-to-one correspondence, wherein the second distributed Bragg reflective film is located on one side of the color conversion layer away from the lens, and the second distribution wherein the Sick Bragg reflective film is disposed to allow transmission of light rays emanating from the color converting layer in the corresponding channel. According to claim 1,
and a transmissive layer correspondingly disposed in a channel in which the color converting layer is not accommodated, wherein, in the channel in which the transmissive layer is accommodated, the lens is located on a light incident side of the transmissive layer. 11. The method of claim 10,
The color conversion assembly further comprising: a vapor deposition film, wherein the vapor deposition film is disposed to correspond to the transmission layer one-to-one, the vapor deposition film is located on one side of the transmission layer away from the lens. 12. The method of claim 11,
wherein the vapor deposition film and the second distributed Bragg reflective film are disposed on the same layer. According to claim 1,
the incident ray is a blue ray,
The color converting layer in some channels may emit red light,
A color conversion assembly, wherein the color conversion layer within some channels may emit green light. According to claim 1,
The color conversion layer is a quantum dot layer or a fluorescent particle layer, color conversion assembly. The method of claim 1,
and a first substrate positioned on a light incident side of the black matrix. 16. The method of claim 15,
and a second substrate positioned on one side of the black matrix away from the first substrate, wherein the second substrate and the first substrate jointly seal a plurality of channels, and the color conversion layer is the first substrate and a color conversion assembly positioned between the second substrate. In the display panel,
a light emitting substrate having a light emitting surface and including a plurality of light emitting units arranged in an array;
The color conversion assembly of any one of claims 1 to 16, which is located on the light emitting surface of the light emitting substrate.
each of the channels and the at least one light emitting unit are disposed to correspond to each other. 18. The method of claim 17,
The light emitting unit is a Micro-LED light emitting unit, the display panel. 18. The method of claim 17,
and a planarization layer disposed between the light emitting surface of the light emitting substrate and the first substrate of the color conversion assembly.

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