KR20210151225A - Color conversion assembly and its manufacturing method and display panel - Google Patents

Abstract

The present application relates to the color conversion assembly 100 and a method of manufacturing the same, and a display panel, and it is possible to reduce a cross color problem between adjacent sub-pixels and to improve light output efficiency. The color conversion assembly 100 includes a base 110; a light blocking layer 120 positioned on the base 110 and having a plurality of channels; and a color conversion layer 140 positioned in at least some channels, wherein the color conversion layer 140 converts the incident light L1 into a light beam having a target color. The light blocking layer 120 includes a support layer 121 positioned on the base 110 ; a black matrix layer 122 continuously extending from the top surface and the side surface of the support layer 121; a reflective layer 123 continuously extending from the top surface and the side surface of the black matrix layer 122; the top surface of the support layer 121 faces away from the base 110, and the top surface of the black matrix layer 122 is It faces away from the base 110 .

Description

Color conversion assembly and its manufacturing method and display panel

This application claims priority to Chinese Patent Application No. 201910568839.8 entitled "Color conversion assembly and manufacturing method and display panel" filed on June 27, 2019, the entire contents of which are incorporated herein by reference do.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display field, and more particularly, to a color conversion assembly, a manufacturing method thereof, and a display panel.

Flat-panel display devices such as liquid crystal display (LCD) devices, organic light-emitting diode (OLED) displays, and display devices using light emitting diode (LED) devices are high-definition, low-power, and thin. Because of its advantages such as body and wide application range, it is widely used in various consumer electronic products such as mobile phones, televisions, personal information terminals, digital cameras, notebook computers, and desktop computers, and has become the mainstream of display devices.

A display device may implement a display of a color pattern through various colorization methods. In some related technologies, curling is implemented by adding a layer of color film to a light emitting substrate. However, in the current color film, there is a problem in that the cross color and light output efficiency between adjacent sub-pixels are generally lowered.

A first aspect of the present application provides a color conversion assembly, the color conversion assembly comprising:

base;

a light blocking layer positioned on the base and having a plurality of channels;

a color conversion layer located in at least some channels; and

The color conversion layer converts incident light into rays of a target color,

The light-shielding layer is

a support layer positioned on the base;

a black matrix layer continuously extending from the top surface and the side surface of the support layer;

a reflective layer continuously extending from the upper surface and the side surface of the black matrix layer;

The upper surface of the support layer faces away from the base,

The top surface of the black matrix layer faces away from the base.

In a second aspect, an embodiment of the present application provides a display panel, the display panel comprising:

a color conversion assembly of any one of the first aspects of the present disclosure;

Including; a light emitting substrate having a light emitting surface;

The light emitting substrate includes a plurality of light emitting units,

The color conversion assembly covers the light emitting surface of the light emitting substrate, wherein the plurality of channels respectively correspond to the plurality of light emitting units.

According to a third aspect, an embodiment of the present application provides a method of manufacturing a color conversion assembly, the method comprising:

forming a light blocking layer on a base, the light blocking layer including a plurality of channels;

forming a color conversion layer in at least some channels, the color conversion layer converting incident light into light rays of a target color;

The step of forming the light-shielding layer,

forming a patterned support layer on the base;

forming a black matrix layer continuously extending on the upper surface and the side surface of the support layer;

and obtaining a light blocking layer by forming a reflective layer continuously extending on the upper surface and the side surface of the black matrix layer.

According to the color conversion assembly of the present embodiment, the light blocking layer of the color conversion assembly includes a supporting layer, a black matrix layer, and a reflective layer stacked. On the one hand, since the black matrix layer is supported by the support layer, the height of the black matrix layer is increased and the thickness of the light shielding layer is effectively increased, thereby preventing cross color between adjacent emitted light, and furthermore, the thickness of the color conversion layer , so that the incident light can be sufficiently used in the color conversion layer, the utilization rate of the incident light is improved, and the light output efficiency is improved. On the other hand, the reflective layer reduces the transmittance of the light rays passing through the channel wall, and the black matrix layer absorbs the incident light passing through the reflection layer, preventing the light rays in the channel from being transmitted into the adjacent channels, so that the adjacent sub-pixels Prevents cross color from occurring in between. On the other hand, the reflective layer may reflect the light that is not sufficiently used in the color conversion layer back to the color conversion layer, thereby improving the utilization rate of incident light, thereby improving the light output efficiency.

1 is a schematic diagram of a cross-sectional structure of a color conversion assembly according to an embodiment of the present application.
2 is a schematic diagram of a cross-sectional structure of a display panel according to an exemplary embodiment of the present disclosure.
3 is a flowchart of a method of manufacturing a color conversion assembly according to an embodiment of the present disclosure.
4A to 4G are schematic cross-sectional structural views illustrating the steps of forming each component included in the color conversion assembly in the method of manufacturing the color conversion assembly according to an embodiment of the present application.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Features and exemplary embodiments of various aspects of the present disclosure are described in detail below. 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 examples. The specific examples described herein are for illustrative purposes only, and are not intended to limit the present application. For those skilled in the art, the present invention may be implemented without these specific details. The following description of the examples is merely to show examples of the present application to provide a better understanding of the present application.

When describing the structure of a component, when it is said that one layer or one region is located “on top” or “top (top)” of another layer or other region, it is located directly on the other layer or other region, or , or other layers or regions between other layers or regions. Also, when the components are inverted, one layer or one region is located on the “bottom side” or “lower side (lower side)” of the other layer or other region.

An embodiment of the present disclosure provides a color conversion assembly, which is applied to a display panel and may implement colorization of light rays emitted from the display panel. Here, the display panel may be, for example, a display panel using a light emitting diode device such as a micro-LED display panel, and in some embodiments, a display panel of an organic light emitting diode (OLED) device, a liquid crystal display It may be another display panel such as a panel (LCD).

In most embodiments of the present application, a case in which the display panel is a display panel using a Micro-LED device will be described as an example. Here, the Micro-LED emits monochromatic light and the color conversion assembly converts the monochromatic light into multi-colored light beams for display.

1 shows a schematic cross-sectional structure of a color conversion assembly according to an embodiment of the present application. 1 , the color conversion assembly 100 includes a base 110 , a light blocking layer 120 , and a color conversion layer 140 . The light blocking layer 120 includes a support layer 121 , a black matrix (BM) layer 122 , and a reflective layer 123 .

The light blocking layer 120 is positioned on the base 110 and includes a plurality of channels 130 . The plurality of channels 130 may be arranged in any manner, and an array arrangement method is preferable. Here, the support layer 121 of the light blocking layer 120 is positioned on the base 110 . The black matrix layer 122 continuously extends from the top surface and the side surface of the support layer 121 , and the top surface of the support layer 121 faces away from the base 110 . The reflective layer 123 continuously extends from the top surface and the side surface of the black matrix layer 122 , and the top surface of the black matrix layer 122 faces away from the base 110 . The color conversion layer 140 is positioned in at least some channels 130 , and the color conversion layer 140 may convert the incident light L1 into a light beam having a target color. For example, the incident light L1 may be blue light, and the color conversion layer 140 may convert blue light into red light or green light.

In some embodiments, the base 110 is a transparent base through which light emitted from the color conversion layer 140 is transmitted. The base 110 may include an inorganic material transparent base comprising, for example, glass or quartz; plastic transparent materials including polyethylene terephthalate, polyethylene naphthalate, polyimide, or polycarbonate; or any type of transparent film.

In some embodiments, the support layer 121 is made of an organic material. For example, it may be one or more of a polyimide resin, an epoxy resin, and an acrylic resin. The support layer 121 may be formed by film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like. The black matrix layer 122 may be formed on the top and side surfaces of the support layer 121 through film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like. The reflective layer 123 may be formed on the top and side surfaces of the black matrix layer 122 through film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, microcontact printing, or the like.

The thickness of the support layer 121 (distance from the base 110 to the top surface of the support layer 121) may be set according to actual requirements. Under the influence of the current black matrix processing capability, it is difficult to prepare a thick black matrix, so the thickness of the color conversion layer cannot be increased, and the light conversion efficiency of the color conversion layer is not high. Supporting the black matrix layer 122 by the support layer 121 indirectly increases the thickness of the black matrix layer, so that the incident light L1 is sufficiently used in the color conversion layer 140 , and increases the utilization rate of the incident light. to improve the light output efficiency.

In some embodiments, the reflective layer 123 may be a metal layer having high light reflection characteristics. The metal may include, for example, one or more of silver, aluminum, gold, iron, copper, and the like.

Optionally, the light blocking layer 120 includes a plurality of channels 130 arranged in an array, and an arrangement method of the plurality of channels 130 matches a pixel arrangement method of a corresponding display panel, and The shape can be adjusted according to the actual design. Here, the shape of the cross section parallel to the base 110 of the channel 130 may be a shape having a circular, elliptical, rectangular, trapezoidal and arc-shaped side sides, and the like, and a cross section perpendicular to the base 110 of the channel 130 . The shape may be a rectangle, a trapezoid, a shape having arc-shaped side sides, and the like. In this embodiment, the shape of the cross-section perpendicular to the base 110 of the channel 130 is trapezoidal. Specifically, it is an equilateral trapezoid. Since the shape of the cross section perpendicular to the base 110 of the channel 130 is trapezoidal, the light beam is easily reflected in the exit direction, and the intensity of the exit light is improved.

The color conversion layer 140 may be located in at least some channels 130 , and the color conversion layer 140 may convert the incident light L1 into a light beam having a target color. The color conversion layer 140 may be a color conversion layer including a photoluminescent material. The photoluminescent material may be quantum dots, fluorescent particles, or the like. In this embodiment, the case where the color conversion layer is a quantum dot layer will be described as an example.

In some embodiments, the incident light L1 may be blue light, and the color conversion layer 140 is located in at least some channels 130 , for example, in FIG. 1 , the left channel 130 and the middle channel 130 . Each color conversion layer 140 is accommodated. The color conversion layer 140 in some channels 130 may emit red light. For example, in FIG. 1 , the color conversion layer 140 in the left channel 130 is a red quantum dot layer, which absorbs the incident light L1 of blue light, converts it into red light, and emits it to the outside. The color conversion layer 140 in some channels 130 may emit green light. For example, in FIG. 1 , the color conversion layer 140 in the intermediate channel 130 is a green quantum dot layer, which absorbs the incident light L1 of blue light, converts it into green light, and emits it to the outside.

The color conversion method of the color of the incident light L1 and the color conversion layer 140 is only an example, and other arrangements are possible in other embodiments. For example, in some embodiments, the incident light L1 may be ultraviolet (UV) light.

According to the color conversion assembly 100 of the present embodiment, the light blocking layer 120 includes a support layer 121 , a black matrix layer 122 and a reflective layer 123 stacked. On the one hand, the support layer 121 is used to support the black matrix layer 122, which increases the height of the black matrix layer 122 and effectively increases the thickness of the light-shielding layer, so that the cross color between the adjacent emitted lights. In addition, by increasing the thickness of the color conversion layer 140 , the incident light L1 can be sufficiently used in the color conversion layer 140 , thereby improving the utilization rate of the incident light and improving the light output efficiency. On the other hand, the reflective layer 123 reduces the transmittance of the light passing through the channel wall, and the black matrix layer 122 absorbs the incident light passing through the reflecting layer 123 so that the light in the channel is transmitted to the adjacent channel. This prevents cross color from occurring between adjacent sub-pixels. On the other hand, the reflective layer 123 may reflect the light that has not been sufficiently used in the color conversion layer 140 back to the color conversion layer 140 to improve the utilization rate of incident light and improve light output efficiency.

In some embodiments, the thickness of the color conversion layer 140 may be less than or equal to a height from the surface of the base 110 facing the light blocking layer 120 to the top surface of the light blocking layer 120 . As such, by preventing the color conversion layer 140 from completely filling the space of the channel 130 to prevent direct contact between the color conversion layer 140 and the light emitting source, the color conversion layer 140 is affected by the amount of heat from the light emitting source. It is possible to prevent the problem of affecting the light conversion efficiency of the color conversion layer 140 due to the deterioration of the performance.

As shown in FIG. 1 , each channel 130 has a first opening OP1 and a second opening OP2 opposite to each other, wherein the first opening OP1 is adjacent to the incident light L1, 2 The opening OP2 is far away from the incident light L1.

Since the size of the first opening OP1 is larger than the size of the second opening OP2 , the path of the incident light L1 in the color conversion layer 140 is increased so that the incident light L1 is transmitted within the color conversion layer 140 . It can be sufficiently converted and utilized, and the light utilization rate can be improved.

The color conversion assembly 100 may further include a heat dissipation layer 150 disposed on an upper surface far away from the base 110 of the reflective layer 123 . The heat dissipation layer 150 may be made of a graphene material or other thermally conductive material. When the color conversion assembly 100 is applied to the display panel, the heat dissipation layer 150 conducts heat generated from the light emitting source (eg, LED) to lower the temperature around the color conversion layer 140 to form the color conversion layer ( 140) can be extended.

The color conversion assembly 100 may further include a first color filter layer 161 , wherein the first color filter layer 161 has a first opening OP1 of the channel 130 in which the color conversion layer 140 is accommodated. cover In some embodiments, the first color filter layer 161 may improve color purity by allowing transmission of light in the same wavelength range as the incident light L1 and reflecting light in at least one other wavelength range. .

In this embodiment, the first color filter layer 161 is a distributed Bragg reflective layer. Specifically, in this embodiment, the incident light L1 is blue light. The color conversion layer 140 in the left channel 130 is a red quantum dot layer, and correspondingly, the first color filter layer 161 covering the first opening OP1 of the left channel 130 allows transmission of blue light. and may also be configured to reflect red light. The color conversion layer 140 in the intermediate channel 130 is a green quantum dot layer, and correspondingly, the first color filter layer 161 covering the first opening OP1 of the intermediate channel 130 allows transmission of blue light. and may also be configured to reflect green light.

The color conversion assembly 100 further includes a second color filter layer 162 . The second color filter layer 162 covers the second opening OP2 of the channel 130 in which the color conversion layer 140 is accommodated. In some embodiments, the second color filter layer 162 reflects or absorbs the incident light L1 that is not sufficiently absorbed by the color conversion layer 140 in the corresponding channel 130 , and the incident light L1 is mixed into the output light. ), it is possible to alleviate the problem of color gamut defects when performing display.

In this embodiment, the second color filter layer 162 is a distributed Bragg reflective layer. The second color filter layer 162 is configured to allow transmission of light rays emitted from the color conversion layer 140 in the corresponding channel 130 and also reflect light rays of at least one other wavelength range. The second color filter layer 162 reflects, for example, a light beam having the same wavelength range as the incident light L1 .

Specifically, in this embodiment, the incident light L1 is blue light. The color conversion layer 140 in the left channel 130 is a red quantum dot layer, and correspondingly, the second color filter layer 162 covering the second opening OP2 of the left channel 130 allows transmission of red light and It may also be configured to reflect blue light. The color conversion layer 140 in the intermediate channel 130 is a green quantum dot layer, and correspondingly, the second color filter layer 162 covering the second opening OP2 of the intermediate channel 130 allows transmission of green light. and may also be configured to reflect blue light.

Through the installation of the second color filter layer 162 , light emitted from the color conversion layer 140 may pass through the second color filter layer 162 , and incident light L1 that is not absorbed by the color conversion layer 140 . ) is reflected by the second color filter layer 162 back into the channel 130 , again exciting the color conversion layer 140 . The structure improves the intensity of the light emitted from the color conversion assembly 100 and effectively improves the color conversion efficiency and luminous efficiency of a display panel and a display device including the color conversion assembly 100 .

The color conversion assembly 100 further includes a transmissive layer 170 . The transmission layer 170 is located in the channel 130 in which the color conversion layer 140 is not installed among the plurality of channels 130 , and the transmission layer 170 transmits light in the same wavelength range as the incident light L1 . .

As shown in FIG. 1 , the transmission layer 170 is accommodated in the right channel 130 in this embodiment. The incident light L1 is blue light, the transmission layer 170 transmits the blue light, and the emitted light of the corresponding channel is blue light. In FIG. 1 , the light emitted from the left channel 130 is red, the light emitted from the middle channel 130 is green, and the light emitted from the right channel 130 is blue, and the channel 130 that emits red light and green light is emitted. The channel 130 that emits blue light and the channel 130 that emits blue light are arranged in an array to realize full color display of the screen.

The color conversion assembly 100 may further include a third color filter layer 163 . The third color filter layer 163 covers the first opening OP1 of the channel 130 in which the transmission layer 170 is accommodated. The third color filter layer 163 is configured to allow transmission of light in the same wavelength range as that of the incident light L1 and reflect light in at least one other wavelength range. In some embodiments, the third color filter layer 163 transmits only light in the same wavelength range as the incident light L1 , thereby improving the purity of light emitted from the corresponding channel 130 . The third color filter layer 163 may not be installed in the color conversion assembly 100 .

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

Embodiments of the present application further 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 of the embodiments of the present application.

2 illustrates a schematic cross-sectional structure of a display panel 1000 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-described embodiment.

The light emitting substrate 200 has a light emitting surface, and the light emitting substrate 200 includes a plurality of light emitting units 210 . The plurality of light emitting units 210 may be arranged in any manner, and preferably may be arranged in an array arrangement manner. In this embodiment, the light emitting substrate 200 is, for example, a light emitting substrate including LED elements, wherein the plurality of light emitting units 210 are each LED light emitting units and are arranged in an array. The LED light emitting unit may be a monochromatic LED light emitting unit, and thus the plurality of light emitting units 210 may emit light of the same color. In some embodiments, the light emitting unit 210 is a Micro-LED light emitting unit.

The light emitting substrate 200 includes a driving circuit, and the driving circuit drives the corresponding light emitting unit 210 to emit light. When the light emitting unit 210 is a micro-LED light emitting unit, the driving circuit includes at least a thin film transistor, and the micro-LED and the thin film transistor are electrically connected.

The light emitting substrate 200 is not limited to a light emitting substrate including an LED device. Optionally, 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 an OLED display panel, and obtains an OLED display panel through combination with the color conversion assembly 100 ; Alternatively, the light emitting substrate 200 may include at least a part of the functional layer of the LCD, and the LCD may be obtained through combination with the color conversion assembly 100 .

Even if the light emitting substrate 200 is a light emitting substrate using LED elements, the light emitting unit 210 is not limited to a blue light LED light emitting unit, and, for example, in other alternative embodiments, the light emitting unit 210 emits an ultraviolet LED light. It may be a unit.

The color conversion assembly 100 covers the light emitting surface of the light emitting substrate 200 , the plurality of channels 130 respectively correspond to the plurality of light emitting units 210 , and the light emitting unit 210 and the color conversion assembly 100 . In between, a filler 211 such as, for example, Liquid Optical Clear Adhesive (LOCA) is provided. Specifically, as shown in FIG. 2 , the filler 211 completely fills the gap between the light emitting unit 210 and the first color filter layer 161 and the third color filter layer 163 to improve the light output rate of the light source. and a uniform light propagation path can be secured.

In this embodiment, the plurality of light emitting units 210 are all blue LED light emitting units. In the left channel 130 of FIG. 2 , the light ray emitted from the blue LED light emitting unit excites the color conversion layer 140 so that the light ray is converted into red light and emitted to the outside; In the middle channel 130 of FIG. 2 , the light ray emitted from the blue LED light emitting unit excites the color conversion layer 140 so that the light ray is converted into green light and emitted to the outside; In the right channel 130 of FIG. 2 , blue light emitted from the blue LED light emitting unit passes through the transmission layer 170 to emit blue light to the outside. The channel 130 emitting red light, the channel 130 emitting green light, and the channel 130 emitting blue light may be arranged in an array to implement a full color display of the screen.

According to the display panel 1000 according to the present exemplary embodiment, the light blocking layer 120 includes a support layer 121 stacked thereon, a black matrix layer 122 , and a reflective layer 123 . On the other hand, by supporting the black matrix layer 122 by the support layer 121, the height of the black matrix layer 122 is increased and the thickness of the light shielding layer is effectively increased, so that the cross color between the adjacent emitted light is In addition, by increasing the thickness of the color conversion layer 140 to allow the incident light L1 to be sufficiently used in the color conversion layer 140 to improve the utilization rate of the incident light, the output light efficiency is improved make it On the other hand, the reflective layer 123 reduces the transmittance of the light rays passing through the channel wall, and the black matrix layer 122 absorbs the incident light that has passed through the reflection layer 123, so that the light rays in the channel go to the adjacent channel. By preventing transmission, cross color is prevented from occurring between adjacent sub-pixels. On the other hand, the reflective layer 123 reflects the light that has not been sufficiently used in the color conversion layer 140 back to the color conversion layer 140 , thereby improving the utilization rate of the incident light, thereby improving the light output efficiency. .

Embodiments herein also provide a method for manufacturing a color conversion assembly, which will be described below.

3 is a flowchart illustrating a method for manufacturing a color conversion assembly according to an exemplary embodiment of the present disclosure, wherein the method for manufacturing the color conversion assembly includes steps S10 to S20.

In S10, a light blocking layer is formed on the base, the light blocking layer having a plurality of channels.

Here, the step of forming the light blocking layer includes the following steps.

A patterned support layer is formed on the base. 4A is a schematic diagram of a cross-sectional structure of a step of forming a support layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. The support layer 121 may be formed on the base 110 by film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, etc., and the support layer 121 includes a plurality of A channel 130 is provided.

A black matrix layer continuously extending on the upper surface and the side surface of the support layer is formed. 4B is a schematic cross-sectional view of a step of forming a black matrix layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. The black matrix layer 122 may be formed on the upper surface and the side surface of the support layer 121 by methods such as film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, microcontact printing, and the like, wherein the black matrix layer The thickness of 122 is 1 μm to 20 μm, and the optical density (OD) of the black matrix layer 122 is 4.0 or more.

A reflective layer continuously extending on the upper surface and the side surface of the black matrix layer is formed. 4C is a schematic diagram of a cross-sectional structure of a step of forming a reflective layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. The reflective layer 123 may be formed on the top and side surfaces of the black matrix layer 122 through film attachment, photolithography, laser processing, inkjet printing, 3D printing, screen printing, microcontact printing, or the like.

In S20, a color conversion layer is formed in at least some channels, and the color conversion layer converts incident light into a ray of a target color.

Before S20, first, a second color filter layer may be formed in an opening adjacent to the base of some channels. 4D is a schematic cross-sectional view of a step of forming a second color filter layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. For example, by using a physical or chemical vapor deposition method, the second color filter layer 162 is formed in an opening adjacent to the base of some channels, and the second color filter layer 162 may be a Bragg reflective layer, and the second color filter layer By adjusting the thickness of 162 , the light emitted from the color conversion layer is selectively transmitted, thereby preventing the problem of leakage of light from the backlight.

In S20 , FIG. 4E shows a schematic cross-sectional structure of a step of forming a color conversion layer in the method of manufacturing a color conversion assembly according to an embodiment of the present application. The color conversion layer 140 may be a color conversion layer including a photoluminescent material, where the photoluminescent material may be quantum dots, fluorescent particles, or the like.

In the present embodiment, two or more types of the color conversion layer 140 may be disposed according to different types of emitted light, for example, the color conversion layer 140 emitting red light and the color conversion layer 140 emitting green light. ) may be included. In some embodiments, the color conversion layer 140 emitting red light may be formed in some channels 130 using a photolithography process, wherein the channel on which the color conversion layer 140 emitting red light is formed is red. It may be a channel 130 corresponding to a sub-pixel. Then, a color conversion layer 140 emitting green light may be formed in some channels 130 using a photolithography process, wherein the channel on which the color conversion layer 140 emitting green light is formed is a green sub-pixel It may be a channel 130 corresponding to . Also, the color conversion layer 140 emitting green light may be formed first, and then the color conversion layer 140 emitting red light may be formed.

In some other embodiments, the incident light is blue light, and as shown in FIG. 4E , the transmission layer 170 may be formed in some channels, and the transmission layer 170 transmits the blue light. The transmissive layer 170 may be formed by filling some channels with a light-transmitting material, or the transmissive layer 170 may be formed in some channels without filling any material.

4F is a schematic cross-sectional view of a step of forming a first color filter layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. As shown in FIG. 4F , after the color conversion layer is formed, the first color filter layer may be formed above the color conversion layer 140 , that is, in an opening far away from the base of some channels. For example, by using a physical or chemical vapor deposition method, the first color filter layer 161 is formed, the first color filter layer 161 may be a Bragg reflective layer, and the first color filter layer 161 transmits incident light and In addition, since it reflects light in a wavelength range different from that of incident light, the purity of light emitted from the color conversion layer is improved.

4G is a schematic cross-sectional view of a step of forming a heat dissipation layer in a method of manufacturing a color conversion assembly according to an embodiment of the present application. 4G , after the first color filter layer is formed, the heat dissipation layer 150 may be formed on the reflective layer 123 . For example, the heat dissipation layer 150 is formed by depositing a graphene film on the upper side of the reflective layer 123 using a chemical vapor deposition method. Preferably, the sum of the thicknesses of the heat dissipation layer 150 , the reflective layer 123 , the black matrix layer 122 , and the support layer 121 is the first color filter layer 161 , the color conversion layer 140 , and the second color filter layer. By exceeding the sum of the thicknesses of 162 , the light emitting unit is prevented from directly contacting the color conversion layer 140 . Graphene has excellent heat conduction performance and timely conducts heat generated from the light emitting source, thereby lowering the temperature around the color conversion layer and extending the lifespan of the color conversion layer.

According to the manufacturing method of the color conversion assembly of the present embodiment, the light blocking layer of the manufactured color conversion assembly includes a supporting layer, a black matrix layer, and a reflective layer stacked. On the one hand, since the black matrix layer is supported by the supporting layer, the height of the black matrix layer is increased and the thickness of the light shielding layer is effectively increased to prevent cross color between adjacent emitted light, and furthermore, the color conversion layer By increasing the thickness, the incident light can be sufficiently used in the color conversion layer, so that the utilization rate of the incident light is improved to improve the light output efficiency. On the other hand, the reflective layer reduces the transmittance of the light rays passing through the channel wall, and the black matrix layer absorbs the incident light passing through the reflection layer, preventing the light rays in the channel from being transmitted into the adjacent channels, so that the adjacent sub-pixels Prevents cross color from occurring in between. On the other hand, the reflective layer may reflect the light that is not sufficiently used in the color conversion layer back to the color conversion layer, thereby improving the utilization rate of the incident light, thereby improving the light output efficiency.

According to the above-described embodiments of the present application, these embodiments have not described every detail in detail, and the present application is not limited to the specific embodiments described. Of course, many modifications and variations are possible based on the above description. This specification has selected and specifically described these embodiments to better illustrate the principles and practical application of the invention, so that those skilled in the art can make good use of the invention and make modifications thereon. This application is limited only by the claims and their full scope and equivalents.

Claims (16)

A color conversion assembly comprising:
base;
a light blocking layer positioned on the base and having a plurality of channels;
Including; at least a part of the color conversion layer located in the channel;
The color conversion layer converts the incident light into a light beam of a target color,
The light-shielding layer,
a support layer positioned on the base;
a black matrix layer continuously extending from an upper surface and a side surface of the support layer;
a reflective layer continuously extending from the upper surface and the side surface of the black matrix layer;
The upper surface of the support layer is directed away from the base,
and a top surface of the black matrix layer faces away from the base. According to claim 1,
A thickness of the color conversion layer is less than or equal to a height from a surface of the base facing the light blocking layer to an upper surface of the light blocking layer. According to claim 1,
and the material of the support layer comprises at least one of a polyimide resin, an epoxy resin, and an acrylic resin. According to claim 1,
each said channel having first and second openings opposite to each other, said first opening proximate said incident light and said second opening remote from said incident light;
wherein a size of the first opening exceeds a size of the second opening. According to claim 1,
and the shape of a cross-section perpendicular to the base of the channel is trapezoidal. The method of claim 1,
The color conversion assembly further comprises a heat dissipation layer located on the upper surface of the reflective layer,
and a top surface of the reflective layer faces away from the base. 7. The method of claim 6,
wherein the heat dissipation layer comprises a graphene material. According to claim 1,
each said channel having a first opening and a second opening opposite each other, the first opening proximate to the incident light and the second opening remote from the incident light, the color converting assembly comprising:
a first color filter layer covering the first opening of the channel in which the color conversion layer is accommodated;
A second color filter layer covering the second opening of the channel in which the color conversion layer is accommodated; further comprising,
the first color filter layer is configured to allow transmission of light in the same wavelength range as the incident light and to reflect at least one other wavelength range;
and the second color filter layer is configured to allow transmission of light rays emitted from the color converting layer of the corresponding channel and to reflect light rays of at least one other wavelength range. 9. The method of claim 8,
wherein the first color filter layer and the second color filter layer are distributed Bragg reflective layers. According to claim 1,
Further comprising a transmissive layer located in a channel in which the color conversion layer is not installed among the plurality of channels,
and the transmissive layer transmits light in the same wavelength range as the incident light. 11. The method of claim 10,
each said channel having a first opening and a second opening opposite each other, the first opening proximate to the incident light and the second opening remote from the incident light, the color converting assembly comprising:
a third color filter layer covering the first opening of the channel in which the transmission layer is received;
and the third color filter layer is configured to allow transmission of light in the same wavelength range as the incident light and reflect light in at least one other wavelength range. In the display panel,
12. The color conversion assembly of any one of claims 1-11;
Including; a light emitting substrate having a light emitting surface;
The light emitting substrate includes a plurality of light emitting units,
and the color conversion assembly covers the light emitting surface of the light emitting substrate, wherein the plurality of channels respectively correspond to the plurality of light emitting units. 13. The method of claim 12,
The display panel further includes a filler positioned between the light emitting unit and the color conversion assembly. 13. The method of claim 12,
a plurality of said light emitting units are arranged in an array. 13. The method of claim 12,
The light emitting unit includes a Micro-LED light emitting unit. A method of manufacturing a color conversion assembly, comprising:
forming a light blocking layer on a base, the light blocking layer including a plurality of channels;
forming a color conversion layer in at least a portion of the channel, wherein the color conversion layer converts incident light into a light beam of a target color;
The step of forming the light blocking layer,
forming a patterned support layer on the base;
forming a black matrix layer continuously extending on an upper surface and a side surface of the support layer;
and obtaining a light blocking layer by forming a reflective layer continuously extending on an upper surface and a side surface of the black matrix layer.

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