WO2023123283A1

WO2023123283A1 - Display panel and manufacturing method therefor

Info

Publication number: WO2023123283A1
Application number: PCT/CN2021/143368
Authority: WO
Inventors: 徐宸科; 樊勇
Original assignee: 厦门市芯颖显示科技有限公司
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2023-07-06

Abstract

Disclosed are a display panel and a manufacturing method therefor. According to the display panel provided by embodiments of the present application, a plurality of light-emitting devices and a plurality of color conversion layers are respectively stacked in a plurality of through holes of a metal foil layer, so that optical crosstalk between the light-emitting devices and optical crosstalk between the color conversion layers can be avoided, and the inner walls of the through holes in the metal foil layer have high reflectivity and low light absorption, thereby facilitating increase of the reflection of light emitted by the light-emitting devices and the color conversion layers at a side viewing angle.

Description

Display panel and manufacturing method thereof

technical field

The present application relates to the field of display technology, in particular to a display panel and a manufacturing method thereof.

Background technique

Micro-Light Emitting Diode (Micro-LED) display technology refers to the technology of realizing light-emitting display with high-density integrated micro-light-emitting diode arrays as pixels on the backplane. At present, Micro-LED display technology has gradually become a research hotspot, and the industry expects high-quality Micro-LED display products to enter the market. High-quality Micro-LED display products will have a strong impact on existing products such as liquid crystal displays (Liquid Crystal Display, LCD), organic light-emitting diodes (Organic Display products such as Light-Emitting Diode (OLED) displays have had a huge impact.

However, the existing Micro-LED displays have the problem of low light extraction efficiency.

technical problem

The present application provides a display panel, a manufacturing method thereof, and a display device, so as to improve the light extraction efficiency of the Micro-LED display, thereby reducing the power consumption of the Micro-LED display.

technical solution

In order to solve the above problems, an embodiment of the present application provides a display panel, the display panel includes: a color filter substrate, the color filter substrate includes a first substrate and a plurality of color filter substrates arranged on one side of the first substrate sheet, black matrix, metal foil layer and multiple color conversion layers, multiple hollow areas are arranged on the black matrix, multiple color filters are respectively located in multiple hollow areas, and the metal foil layer is arranged on the black matrix away from the first lining On one side of the bottom, the metal foil layer is provided with a plurality of through holes, and the plurality of through holes are respectively arranged corresponding to the plurality of color filters, and the plurality of color conversion layers are respectively located in the plurality of through holes; the display substrate, and the color The filter substrates are oppositely arranged, and the display substrate includes a driving substrate and a plurality of light-emitting devices arranged on one side of the driving substrate; wherein, the side on which the plurality of light-emitting devices are arranged on the display substrate faces to the side on which the metal foil layer is arranged on the color filter substrate. One side is provided, and a plurality of light emitting devices are respectively located in a plurality of through holes, and a plurality of color conversion layers respectively cover the surfaces of the plurality of light emitting devices on one side away from the driving substrate.

Wherein, the material of the metal foil layer includes silver or aluminum.

Wherein, the thickness range of the metal foil layer is 20-200 μm.

Wherein, the material of the color conversion layer includes quantum dot material, phosphor material, phosphorescence photoluminescence material or organic photoluminescence material.

Wherein, the cross-sectional area of the through hole is not larger than the cross-sectional area of the color filter.

Wherein, the driving substrate includes a plurality of pixel regions arranged in rows and columns, and each row of pixel regions includes red pixel regions, green pixel regions, blue pixel regions and compensation color pixel regions periodically arranged in the row direction, and each column of pixel regions It includes red pixel areas, green pixel areas, blue pixel areas and compensation color pixel areas arranged periodically in the column direction.

Wherein, the side on which multiple light-emitting devices are arranged on the display substrate and the side on which the metal foil layer is arranged on the color filter substrate are connected together through an adhesive glue layer.

In order to solve the above problems, the embodiment of the present application also provides a method for manufacturing a display panel, the method for manufacturing a display panel includes: providing a first substrate, and forming a plurality of color filters and black color filters on the first substrate Matrix, the black matrix is provided with multiple hollow areas, and multiple color filters are respectively located in multiple hollow areas; a metal foil layer is formed on the multiple color filters and the black matrix; multiple color filters are formed on the metal foil layer Through holes, a plurality of through holes are respectively arranged corresponding to a plurality of color filters; a plurality of color conversion layers are respectively formed in the plurality of through holes; a driving substrate is provided, and a plurality of light-emitting devices are formed on the driving substrate; the driving substrate It is fixed on the side of the metal foil layer away from the first substrate, and the plurality of light emitting devices are respectively located in the plurality of through holes, so that the plurality of color conversion layers respectively cover the surface of the side of the plurality of light emitting devices away from the driving substrate.

Wherein, forming a plurality of color conversion layers in the plurality of through holes respectively includes: forming a plurality of color conversion layers in the plurality of through holes through a doctor blade coating process.

Wherein, the step of forming the metal foil layer on the plurality of color filters and the black matrix specifically includes: providing the metal foil layer, and fixing the metal foil layer on the plurality of color filters and the black matrix through an adhesive layer away from the first on one side of a substrate.

Wherein, the material of the metal foil layer includes silver or aluminum.

Wherein, the thickness range of the metal foil layer is 20-200 μm.

Beneficial effect

The beneficial effects of the present application are: different from the prior art, the display panel and the manufacturing method provided by the present application are provided by stacking multiple light-emitting devices and multiple color conversion layers in multiple through holes of the metal foil layer respectively, It can avoid the light crosstalk between the light emitting devices and the light crosstalk between the color conversion layers, and the inner wall reflectivity of the through hole on the metal foil layer is high, and the light absorption is low, which is beneficial to increase the emission of the light emitting device and the color conversion layer. The reflection of light from the angle of view, thereby increasing the light emitted from the light-emitting surface of the display panel, so as to improve the light-emitting efficiency, thereby reducing power consumption, and making it necessary to use only one light-emitting color light-emitting diode (for example, blue light Micro-LED with high luminous efficiency ) can realize full-color display, which can avoid the use of red light emitting diodes and green light emitting diodes with low luminous efficiency in the display panel, and thus can improve the light extraction efficiency of the micro light emitting diodes in the Micro-LED display panel to reduce Micro - Power consumption of the LED display panel.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The figures show some implementations of the present application, and those skilled in the art can obtain other figures based on these figures without any creative effort.

The components in the figures are not to scale but merely serve to illustrate the principles of the application. For ease of illustration and description of some parts of the present application, corresponding parts in the figures may be exaggerated, ie made larger relative to other components in an exemplary device actually manufactured in accordance with the present application. In the drawings, the same or similar technical features or components will be denoted by the same or similar reference numerals.

FIG. 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application.

FIG. 2 is a schematic top view of a driving substrate provided by an embodiment of the present application.

FIG. 3 is another schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application.

FIG. 4 is another schematic structural view of the top view of the driving substrate provided by the embodiment of the present application.

FIG. 5 is another schematic top view of the structure of the drive substrate provided by the embodiment of the present application.

FIG. 6 is another schematic top view of the driving substrate provided by the embodiment of the present application.

FIG. 7 is a schematic flowchart of a method for manufacturing a display panel provided by an embodiment of the present application.

FIG. 8 is a schematic cross-sectional structure diagram after step S11 provided by the embodiment of the present application is completed.

FIG. 9 is a schematic cross-sectional structure diagram after step S12 provided by the embodiment of the present application is completed.

FIG. 10 is a schematic cross-sectional structure diagram after step S13 provided by the embodiment of the present application is completed.

FIG. 11 is a schematic cross-sectional structure diagram after step S14 provided by the embodiment of the present application is completed.

FIG. 12 is a schematic cross-sectional structure diagram after step S15 provided by the embodiment of the present application is completed.

Embodiments of the present invention

The application will be described in further detail below in conjunction with the accompanying drawings and embodiments. In particular, the following examples are only used to illustrate the present application, but not to limit the scope of the present application. Likewise, the following embodiments are only some of the embodiments of the present application but not all of them, and all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

Please refer to FIG. 1 . FIG. 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application. As shown in FIG. 1 , the display panel includes a display substrate 10 and a color filter substrate 20 oppositely arranged.

The color filter substrate 20 includes a first substrate 23 and a plurality of color filters 21, a black matrix 22, a metal foil layer 11, and a plurality of color conversion layers 12 arranged on one side of the first substrate 23. On the black matrix 22 There are a plurality of hollow areas, and a plurality of color filters 21 are respectively located in the plurality of hollow areas. The metal foil layer 11 is arranged on the side of the black matrix 22 away from the first substrate 23. On the metal foil layer 11, there are a plurality of The through holes 111 and the plurality of through holes 111 are respectively arranged corresponding to the plurality of color filters 21 , and the plurality of color conversion layers 12 are respectively located in the plurality of through holes 111 . Specifically, the cross-sectional area of the above-mentioned through hole 111 is not larger than the cross-sectional area of the color filter 21, and the orthographic projection of the above-mentioned through hole 111 on the first substrate 23 can be located at the corresponding color filter 21 on the second substrate. Orthographic projection on a substrate 23 .

The display substrate 10 includes a driving substrate 14 and a plurality of light emitting devices 13 disposed on one side of the driving substrate 14 .

Wherein, the side of the display substrate 10 on which the plurality of light-emitting devices 13 are disposed faces the side of the color filter substrate 20 on which the metal foil layer 11 is disposed.

Specifically, one side of the plurality of light emitting devices 13 on the display substrate 10 and the side of the color filter substrate 20 on which the metal foil layer 11 is disposed may be connected together through an adhesive layer. Wherein, the adhesive adhesive layer may specifically be a light-transmitting adhesive layer.

It can be understood that, in the display panel provided by the embodiment of the present application, it can be defined that in the vertical direction, one light emitting device 13 , one color conversion layer 12 and one color filter 21 correspondingly arranged constitute one pixel. When the display panel is displaying images and a certain pixel needs to be lit, the light emitted by the light-emitting device 13 in the pixel will first be converted into white light through the color conversion layer 12 in the pixel, and then pass through the color filter in the pixel. Sheet 21 converts light to realize full-color display.

Specifically, the above-mentioned metal foil layer 11 can be fixed on the side of the black matrix 22 away from the first substrate 23 through the adhesive layer 30 . The above-mentioned through hole 111 may vertically penetrate the metal foil layer 11 , and its longitudinal cross-sectional shape may be a geometric shape such as a rectangle or an inverted trapezoid. The light emitted by the plurality of light emitting devices 13 may have the same color, and the plurality of color conversion layers 12 can respectively convert the light emitted by the plurality of light emitting devices 13 into white light.

In this embodiment, the plurality of color conversion layers 12 and the plurality of light emitting devices 13 may correspond one to one, that is, the number of color conversion layers 12 and the number of light emitting devices 13 in the display panel may be equal. Moreover, each color conversion layer 12 can cover the light-emitting side of its corresponding light-emitting device 13, so that when the light-emitting device 13 emits light, the light emitted by the light-emitting device 13 can be converted into white light.

Specifically, the plurality of light emitting devices 13 and the plurality of through holes 111 may also correspond one to one, that is, the number of light emitting devices 13 and the number of through holes 111 in the display panel may also be equal. Correspondingly, each through hole 111 can have a color conversion layer 12 and a light emitting device 13 correspondingly, and the color conversion layer 12 and light emitting device 13 in the through hole 111 can be in the depth direction of the through hole 111 (that is, , the above-mentioned metal foil layer 11 in the thickness direction) is stacked and arranged.

In this way, the above-mentioned metal foil layer 11 having through holes 111 can not only separate each light emitting device 13 from other light emitting devices 13 located around it, so as to effectively avoid optical crosstalk between adjacent light emitting devices 13 and adjacent color conversion The optical crosstalk between the layers 12 improves the display effect of the display panel.

In a specific embodiment, the above-mentioned color conversion layer 12 can cover its corresponding light-emitting device 13, so that the light emitted from the light-emitting device 13 can enter its corresponding color conversion layer 12 as much as possible, thereby improving the performance of the light-emitting device. 13 Utilization of the emitted light.

Specifically, the plurality of light-emitting devices 13 may be arranged in an array to form a light-emitting device array, and the plurality of color conversion layers 12 may be arranged in the same manner as the plurality of light-emitting devices 13, that is, the plurality of The color conversion layers 12 can also be arranged in an array to form a color conversion layer array.

In one embodiment, as shown in FIG. 1 , the inner wall of the through hole 111 may be in contact with the surrounding surfaces of the light emitting device 13 , that is, there may be no gap between the inner wall of the through hole 111 and the light emitting device 13 . In other embodiments, there may also be a gap between the inner wall of the through hole 111 and the light emitting device 13 , and the color conversion layer 12 may fill the gap, so as to improve the performance of the display panel.

In this embodiment, the light emitted by the plurality of light emitting devices 13 may be of the same color, and the color conversion layer 12 can convert the light emitted by the light emitting devices 13 into white light. Wherein, the light emitted by the above-mentioned light emitting device 13 may be primary color light (for example, blue light), or light of other colors such as purple light, colorless ultraviolet light, or the like. Specifically, the above-mentioned light emitting device 13 may be a light emitting diode (Light Emitting Diode, LED), for example, a blue LED.

In a specific embodiment, the above-mentioned light-emitting device 13 can be specifically a micro-light-emitting diode (Micro-Light Emitting Diode, Micro-LED), for example, blue Micro-LED. Micro-LED has the advantages of low power consumption, high brightness, long life, fast response time, etc., which is conducive to improving the display performance of the above-mentioned display panel.

In this embodiment, the above-mentioned metal foil layer 11 has a high reflectivity, that is, the inner wall of the through hole 111 on the above-mentioned metal foil layer 11 has a high reflectivity to light, which is beneficial to increase the light-emitting device 13 and color in the through hole 111. The reflection of the side viewing angle light emitted by the conversion layer 12 further increases the light emitted from the light-emitting device 13 into the above-mentioned color conversion layer 12 and the white light emitted from the color conversion layer 13 to the outside of the above-mentioned color conversion layer 12, thereby improving the above-mentioned The light output efficiency of the display panel is conducive to reducing power consumption.

In a specific embodiment, the material of the metal foil layer 11 may include, but is not limited to, metals with high reflectivity such as silver or aluminum. For example, the aforementioned metal foil layer 11 may specifically be a silver foil layer or an aluminum foil layer.

It can be understood that, compared with black or gray retaining walls, there are problems of high light absorption and serious damage to light energy. The retaining wall in this embodiment is formed by punching holes with high-reflectivity metal foil, and the reflectivity of the hole wall is high. The light absorption is low, which can improve the utilization rate of the light emitted by the light emitting device 13, thereby improving the luminous efficiency and reducing power consumption.

In some embodiments, as shown in FIG. 1 , the surface of the above-mentioned light-emitting device 13 away from the color conversion layer 12 and the surface of the above-mentioned color conversion layer 12 away from the light-emitting device 13 can be respectively connected to the above-mentioned metal foil layer 11 in the depth direction of the through hole 111. Align the opposite surfaces on the top. That is, the total thickness of the light emitting device 13 and the color conversion layer 12 stacked in the through hole 111 in the depth direction of the through hole 111 may be equal to the thickness of the metal foil layer 11 in the depth direction of the through hole 111 .

In some other embodiments, the total thickness of the light emitting device 13 and the color conversion layer 12 stacked in the through hole 111 in the depth direction of the through hole 111 may be smaller than the thickness of the metal foil layer 11 above. Specifically, the surface of the above-mentioned light-emitting device 13 away from the color conversion layer 12 may be aligned with an end surface of the above-mentioned through hole 111 close to the light-emitting device 13, and the height of the surface of the above-mentioned color conversion layer 12 away from the light-emitting device 13 relative to the end surface may be less than The depth of the above-mentioned through hole 111. In this way, it is beneficial to reduce the emission angle of the white light emitted by the color conversion layer 12 and increase the brightness of the display panel in the depth direction (ie, the vertical direction) of the through hole 111 to further improve the light extraction efficiency.

Specifically, when the thickness of the light-emitting device 13 in the depth direction of the through hole 111 is a fixed value, the greater the thickness of the metal foil layer 11, the greater the depth of the corresponding through hole 111, so that the through hole 111 can A thicker color conversion layer 12 is provided. In a specific embodiment, the thickness of the metal foil layer 11 may range from 20 μm to 200 μm, such as 20 μm, 50 μm, 80 μm, 110 μm, 140 μm, 170 μm, 200 μm and so on. Moreover, it can be understood that, compared with the traditional retaining wall, the retaining wall of this embodiment is formed by perforating metal foil, and the thickness can be larger, which is beneficial to broaden the selection range of the color conversion material used to form the color conversion layer 12, The color conversion efficiency of the color conversion layer 12 is improved, and the concentration of the color conversion material in the color conversion layer 12 is reduced.

In this embodiment, when the light (for example, blue light) emitted by the above-mentioned light-emitting device 13 passes through the color conversion layer 12 on it, part of the light will be absorbed by the color conversion layer 12, and the remaining light will be combined with the color conversion layer 12. The light emitted by 12 is mixed to obtain white light, so as to ensure that the light emitted from the color conversion layer 12 is white light.

Specifically, after the above-mentioned color conversion layer 12 absorbs the light emitted by the light emitting device 13, the wavelength range of the emitted light may be 500nm to 660nm. In addition, the light emitted by the above-mentioned color conversion layer 12 may be monochromatic light or multiple color light.

For example, taking the light emitted by the light-emitting device 13 as blue light (G) as an example, the light emitted by the color conversion layer 12 may be yellow light (Y), two-color light including green light and red light (G+R), Two-color light (Y+R) including yellow light and red light or two-color light (G+O) including green light and orange light, etc.

In a specific embodiment, the material of the color conversion layer 12 may include photoluminescent materials such as quantum dot materials, phosphor materials, phosphorescent photoluminescent materials, or organic photoluminescent materials. Wherein, the quantum dot material may include but not limited to CdS/CdSe, InP, perovskite quantum dots and the like. Phosphor materials may include, but are not limited to, yttrium aluminum garnet (YAG), silicate phosphor, nitride phosphor, and the like. Phosphorescent photoluminescent materials may include, but are not limited to, fluoride phosphor (KSF). Organic photoluminescent materials may include, but are not limited to, fluorescent pigments or dies. Moreover, during specific implementation, the above-mentioned color conversion layer 12 may be formed by mixing photoluminescent materials and binders.

Specifically, the photoluminescent material contained in the above-mentioned color conversion layer 12 can absorb the light (such as blue light) emitted by the above-mentioned light-emitting device 13, that is, can be effectively excited by the light emitted by the above-mentioned light-emitting device 13, and then emit White light can be obtained by mixing with the light emitted by the above-mentioned light emitting device 13 .

Moreover, it can be understood that, in addition to the above-mentioned photoluminescent material that can convert the light emitted by the light-emitting device 13 into white light, any other material with the same effect can also be used as the photoluminescent material in the color conversion layer 12 .

In a possible application scenario, the above-mentioned light-emitting device 13 can be specifically a blue light Micro-LED, the above-mentioned color conversion layer 12 can be excited by blue light, and the light emitted after the excitation can be mixed with the blue light to obtain white light, thereby ensuring self-color conversion. The light emitted by layer 12 is white light. In this way, since the cost of blue Micro-LED chips is lower than that of red Micro-LED chips and green Micro-LED chips, compared with Micro-LED chips that need to use three light-emitting colors (that is, blue Micro-LED chips, Green light Micro-LED chip and red light Micro-LED chip) to realize the display panel of full-color display, in this embodiment, only need to use the blue light Micro-LED chip, which is a Micro-LED chip with a light-emitting color, to realize the display panel The full-color display avoids the use of red Micro-LED chips with low luminous efficiency and high power consumption, which is conducive to improving the luminous efficiency of the display panel and reducing the power consumption of the display panel.

Moreover, the display panel in this embodiment only needs to transfer the blue light Micro-LED chip, the transfer efficiency can be increased by three times, and the transfer cost is reduced. At the same time, since the usage of blue-light Micro-LED chips has increased by 3 times, and blue-light Micro-LED chips are easier to achieve scale efficiency, it is beneficial to reduce chip costs.

In this embodiment, the driving substrate 14 may include a second substrate 141 and a TFT device layer 142 that are stacked, and the plurality of light emitting devices 13 may be disposed on the side of the TFT device layer 142 away from the second substrate 141, and The above-mentioned multiple light emitting devices 13 may all be electrically connected to the TFT device layer 142 . Wherein, the TFT device layer 142 can control the above-mentioned plurality of light emitting devices 13 .

Specifically, as shown in FIG. 2, the above-mentioned TFT device layer 142 may include a plurality of gate lines, a plurality of data lines disposed on the second substrate 141, and A plurality of pixel regions, wherein the plurality of pixel regions may include a red pixel region 31, a green pixel region 32, a blue pixel region 33, and the like. The above-mentioned light emitting devices 13 can be fixed on the corresponding pixel regions in the driving substrate 14 by welding, and the plurality of light-emitting devices 13 can correspond to the above-mentioned plurality of pixel regions one by one.

In this embodiment, after the light emitted by the above-mentioned multiple light-emitting devices 13 is converted into white light by the above-mentioned multiple color conversion layers 12 respectively, the converted white light can be filtered after passing through the above-mentioned multiple color filters 21 respectively. A variety of primary color light (for example, red, green and blue light).

In some embodiments, the pixel structure of the above-mentioned display panel can be designed with pixel structures such as RGB, RGBW, RGBC, RGBY, RGBC, RGBYC, RGBYM, RGBCM, RGBYC, and WYCM. Among them, R is red, G is green, B is blue, W is white, M is magenta (including B and R), Y is magenta (including G and R), and C is cyan (including B and G two colors).

When the pixel structure of the display panel is RGBW, since the white pixels can increase the brightness of the display screen, the luminous intensity of the RGB pixels can be appropriately reduced, thereby reducing power consumption. It can be understood that assuming that the brightness of the white light emitted by the white pixel is basically equal to the brightness of the white light formed by mixing the light emitted by the three RGB pixels, then when the display panel displays a full white picture, the pixel structure of the RGBW MicroLED display panel The brightness is about 1.5 times the brightness of the MicroLED display panel whose pixel structure is RGB.

In a specific embodiment, as shown in FIG. 1, the above-mentioned plurality of color filters 21 may include red filters R (for forming red pixels), green filters G (for forming green pixels) and blue Color filter B (for forming blue pixels), wherein, after the white light emitted from the above-mentioned color conversion layer 12 passes through its corresponding red filter R, green filter G or blue filter B, Red light, green light or blue light can be filtered out accordingly, thereby realizing the full-color display of the above-mentioned display panel.

In another specific embodiment, as shown in FIG. 3 , the above-mentioned plurality of color filters 21 not only include a red filter R, a green filter G, and a blue filter B, but also include compensation color filters Light sheet X. Correspondingly, the pixel structure of the above-mentioned display panel is RGBX, and, as shown in FIG. Pixel area 34 . Specifically, the plurality of pixel regions in the driving substrate 14 may be arranged in rows and columns, and each row of pixel regions may include red pixel regions 31, green pixel regions 32, blue pixel regions 33 and Compensation color pixel area 34 , and each pixel area in the same row of pixel areas can be the same type of pixel area, for example, all are red pixel area 31 , green pixel area 32 , blue pixel area 33 or compensation color pixel area 34 . In addition, in some embodiments where the pixel regions located in the same row of pixel regions are replaced by the same kind of pixel regions, each row of pixel regions may include red pixel regions 31, green pixel regions 32, The blue pixel area 33 and the compensation color pixel area 34 .

Wherein, the compensation color filter X can be white filter W (for forming white pixels), yellow filter Y (for forming yellow pixels), cyan filter C (for forming cyan pixels), quality Red filter M (for forming magenta pixels), etc. Moreover, after the white light emitted from the color conversion layer 12 passes through the compensation color filter X, the display brightness of the display panel can be effectively improved.

In a possible application scenario, the above-mentioned plurality of color filters 21 may include a red filter R, a green filter G, a blue filter B and a white filter W, corresponding to the pixel structure of the above-mentioned display panel RGBW, and, as shown in FIG. 5 , the plurality of pixel areas in the driving substrate 14 may include a red pixel area 31 , a green pixel area 32 , a blue pixel area 33 and a white pixel area 34 . Specifically, the plurality of pixel regions in the driving substrate 14 may be arranged in rows and columns, and each row of pixel regions may include red pixel regions 31, green pixel regions 32, blue pixel regions 33 and white pixel area 34, and each column of pixel area may include red pixel area 31, green pixel area 32, blue pixel area 33 and white pixel area 34 arranged periodically in the column direction.

In another possible application scenario, the plurality of color filters 21 may include a red filter R, a green filter G, a blue filter B, and a yellow filter Y, corresponding to the pixels of the above-mentioned display panel The structure is RGBY, and, as shown in FIG. 6 , the plurality of pixel areas in the driving substrate 14 may include a red pixel area 31 , a green pixel area 32 , a blue pixel area 33 and a yellow pixel area 35 . Specifically, the plurality of pixel regions in the driving substrate 14 may be arranged in rows and columns, and each row of pixel regions may include red pixel regions 31, green pixel regions 32, blue pixel regions 33 and A yellow pixel area 35 , and each column of pixel areas may include a red pixel area 31 , a green pixel area 32 , a blue pixel area 33 and a yellow pixel area 35 arranged periodically in the column direction.

In this way, compared with a display panel designed with an RGB pixel structure, the display panel in this embodiment not only includes red pixels, green pixels, and blue pixels, but also includes compensation color pixels, which can reduce the luminous intensity of the RGB pixels in the display panel, And improve display brightness and luminous efficiency.

In the display panel of this embodiment, by stacking multiple light-emitting devices and multiple color conversion layers in multiple through holes of the metal foil layer, it is possible to avoid light crosstalk between light-emitting devices and light interference between color conversion layers. Crosstalk, and the inner wall reflectivity of the through hole on the metal foil layer is high, and the light absorption is low, which is conducive to increasing the reflection of the side view light emitted by the light-emitting device and the color conversion layer, thereby increasing the light emitted from the light-emitting surface of the display panel. In order to improve the light-emitting efficiency, thereby reducing power consumption, and only need to use light-emitting diodes of one light-emitting color (for example, blue light Micro-LED with high luminous efficiency) to achieve full-color display, which can avoid the use of low light-emitting diodes in the display panel. High-efficiency red light-emitting diodes and green light-emitting diodes, which can improve the luminous efficiency of micro-light-emitting diodes in Micro-LED display panels, reduce the power consumption of Micro-LED display panels, and improve the production efficiency of Micro-LED display panels .

Please refer to Figure 7. Figure 7 is a schematic flow chart of the method for manufacturing the display panel provided by the embodiment of the present application. Please refer to Figures 1 to 6 at the same time. Schematic diagram of the structure. The specific process of the manufacturing method of the display panel provided in this embodiment may be as follows:

Step S11: providing a first substrate 23, and forming a plurality of color filters 21 and a black matrix 22 on the first substrate 23, the black matrix 22 is provided with a plurality of hollow areas, and the plurality of color filters 21 are respectively Located within multiple cutout areas.

Wherein, the schematic cross-sectional structure after step S11 is completed may be shown in FIG. 8 .

Specifically, the specific structure and formation method of the color filter 21 and the black matrix 22 can refer to the specific implementation manners of the color filter and the black matrix in the prior art, so details are not repeated here.

Step S12 : forming the metal foil layer 11 on the plurality of color filters 21 and the black matrix 22 .

Wherein, the schematic cross-sectional structure after the step S12 is completed may be as shown in FIG. 9 .

Specifically, the above step S12 may specifically include: providing the metal foil layer 11, and fixing the metal foil layer 11 on the side of the plurality of color filters 21 and the black matrix 22 away from the first substrate 23 through the adhesive layer 30 . Wherein, the adhesive layer 30 may specifically be a transparent adhesive layer.

Step S13 : forming a plurality of through holes 111 on the metal foil layer 11 , and the plurality of through holes 111 are respectively arranged corresponding to the plurality of color filters 21 .

Wherein, the schematic cross-sectional structure after step S13 is completed may be shown in FIG. 10 .

Specifically, a plurality of through holes 111 may be formed on the metal foil layer 11 by a through hole etching process or a laser drilling process.

Step S14 : Forming a plurality of color conversion layers 12 in the plurality of through holes 111 .

Wherein, a schematic cross-sectional structure after step S14 is completed may be shown in FIG. 11 .

Specifically, a plurality of color conversion layers 12 may be respectively formed in a plurality of through holes 111 through a doctor blade coating process. Wherein, the color conversion layer 12 may not fill the through hole 111, that is, after the color conversion layer 12 is formed in the through hole 111, there will be a remaining space 111A at the end of the through hole 111 away from the above-mentioned color filter substrate 20, the remaining space 111A can be used to accommodate the corresponding light emitting device 13 in subsequent processes. Moreover, after the above-mentioned plurality of color conversion layers 12 are formed by the doctor blade coating process, the color conversion layer material remaining on the surface of the metal foil layer 11 can also be wiped off to avoid contamination.

It should be noted that, compared with some methods of manufacturing display panels that use yellow light process and inkjet printing process to form the color conversion layer, the color conversion layer in this embodiment is formed by using a low-cost scrape coating process. Formation reduces the production cost, and the glue used to form the color conversion layer has the advantages of a large selection range and low material cost. In addition, the metal foil layer material and the color conversion layer material used in this embodiment have been produced in batches, so there is no need to develop new materials, and the material cost is low, which can further reduce the production cost.

Step S15 : providing a driving substrate 14 , and forming a plurality of light emitting devices on the driving substrate 14 .

Wherein, the schematic cross-sectional structure after step S15 can be shown in FIG. 12 .

Specifically, mass transfer of a plurality of light emitting devices 13 onto the driving substrate 14 may be performed to form a plurality of light emitting devices 13 on the driving substrate 14 .

In a specific embodiment, the above-mentioned light emitting device 13 may specifically be a Micro-LED (for example, a blue-light Micro-LED). Moreover, in specific implementation, multiple Micro-LEDs can be formed on a single crystal silicon substrate, and then the multiple Micro-LEDs on the single crystal silicon substrate can be cut to obtain multiple independent Micro-LEDs, which can then be soldered Each Micro-LED is transferred to a corresponding area on the driving substrate 14 (that is, a corresponding pixel area) in a manner.

It should be noted that, in this embodiment, the structure obtained after performing the above step S11, step S12, step S13 and step S14 in sequence is the above-mentioned color filter substrate 20, and the structure obtained after performing the above step S15 in this embodiment is the above-mentioned structure. A substrate 10 is shown.

Moreover, there is no sequence in the preparation of the above-mentioned color filter substrate 20 and the display substrate 10 . That is, steps S11 to S14 for preparing the color filter substrate 20 may be performed in parallel with step S15 for preparing the display substrate 10 , or may be performed before step S15 , or may be performed after step S15 .

Step S16: Fix the driving substrate 14 on the side of the metal foil layer 11 facing away from the first substrate 23, and make the plurality of light emitting devices 13 respectively located in the plurality of through holes 111, so that the plurality of color conversion layers 12 respectively cover the A plurality of light emitting devices 13 is away from one side surface of the driving substrate 14 .

Wherein, a schematic cross-sectional structure diagram after step S16 is completed may be shown in FIG. 1 .

Specifically, the driving substrate 14 formed with a plurality of light emitting devices 13 can be fixed on a side of the metal foil layer 11 away from the color filter substrate 20 in the direction that the plurality of light emitting devices 13 are opposite to the plurality of through holes 111 one by one. side, and make the plurality of light emitting devices 13 respectively located in the plurality of through holes 111 . Wherein, the light-emitting side of each light-emitting device 13 faces its corresponding color conversion layer 12, so that the color conversion layer 12 can convert the light emitted by its corresponding light-emitting device 13 into white light. Moreover, the plurality of color filters 21 of the color filter substrate 20 can respectively convert the white light emitted by the plurality of color conversion layers 12 into a plurality of primary color lights, thereby realizing the full-color display of the display panel.

It should be noted that, for the specific structure of the display panel in this embodiment, reference may be made to the specific implementation manners in the above embodiments of the display panel, so details are not repeated here.

The manufacturing method of the display panel of this embodiment, by providing a first substrate, and forming a plurality of color filters and a black matrix on the first substrate, the black matrix is provided with a plurality of hollow areas, a plurality of color filters The chips are respectively located in a plurality of hollow areas, and then a metal foil layer is formed on a plurality of color filters and a black matrix, and a plurality of through holes are formed on the metal foil layer, and a plurality of through holes are respectively connected with a plurality of color filters Correspondingly, a plurality of color conversion layers are respectively formed in a plurality of through holes, and then a driving substrate is provided, and a plurality of light-emitting devices are formed on the driving substrate, and then the driving substrate is fixed on a side of the metal foil layer away from the first substrate. and make multiple light emitting devices respectively located in multiple through holes, so that multiple color conversion layers respectively cover the surface of the multiple light emitting devices on the side away from the driving substrate, so as to avoid optical crosstalk and color crosstalk between the light emitting devices. The light crosstalk between the conversion layers, and the inner wall reflectivity of the through hole on the metal foil layer is high, and the light absorption is low, which is conducive to increasing the reflection of the side view light emitted by the light-emitting device and the color conversion layer, thereby increasing the self-display panel. The light emitted from the light-emitting surface improves the light-emitting efficiency, thereby reducing power consumption, and enables full-color display to be achieved only by using a light-emitting diode of one color (for example, a high-efficiency blue Micro-LED). Red light emitting diodes and green light emitting diodes with low luminous efficiency are used in the display panel, so the luminous efficiency of the micro light emitting diodes in the Micro-LED display panel can be improved to reduce the power consumption of the Micro-LED display panel.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the protection of the application. within range.

Claims

A display panel comprising:

A color filter substrate, the color filter substrate includes a first substrate and a plurality of color filters arranged on one side of the first substrate, a black matrix, a metal foil layer and a plurality of color conversion layers, the The black matrix is provided with a plurality of hollow areas, the plurality of color filters are respectively located in the plurality of hollow areas, and the metal foil layer is arranged on the side of the black matrix away from the first substrate, The metal foil layer is provided with a plurality of through holes, the plurality of through holes are respectively set corresponding to the plurality of color filters, and the plurality of color conversion layers are respectively located in the plurality of through holes;

A display substrate, arranged opposite to the color filter substrate, the display substrate includes a driving substrate and a plurality of light-emitting devices arranged on one side of the driving substrate;

Wherein, the side on which the plurality of light-emitting devices are provided on the display substrate is set toward the side on which the metal foil layer is provided on the color filter substrate, and the plurality of light-emitting devices are respectively located on the plurality of In the through holes, the plurality of color conversion layers respectively cover the surfaces of the plurality of light emitting devices on one side away from the driving substrate.
The display panel according to claim 1, wherein a material of the metal foil layer includes silver or aluminum.
The display panel according to claim 1, wherein the thickness of the metal foil layer is in the range of 20-200 μm.
The display panel according to claim 1, wherein the material of the color conversion layer comprises quantum dot material, phosphor material, phosphorescence photoluminescence material or organic photoluminescence material.
The display panel according to claim 1, wherein a cross-sectional area of the through hole is not larger than a cross-sectional area of the color filter.
The display panel according to claim 1, wherein the driving substrate includes a plurality of pixel areas arranged in rows and columns, and each row of pixel areas includes red pixel areas, green pixel areas, blue pixel areas, and blue pixel areas periodically arranged in the row direction. The pixel area and the pixel area of compensation color, each column of pixel area includes the red pixel area, the green pixel area, the blue pixel area and the compensation color pixel area periodically arranged in the column direction.
The display panel according to claim 1, wherein the side on which the plurality of light-emitting devices are provided on the display substrate is connected to the side on which the metal foil layer is provided on the color filter substrate through adhesive glue. Layers are connected together.
A method of manufacturing a display panel, comprising:

A first substrate is provided, and a plurality of color filters and a black matrix are formed on the first substrate, and a plurality of hollow areas are arranged on the black matrix, and a plurality of the color filters are respectively located in a plurality of In the hollow area;

forming a metal foil layer on a plurality of the color filters and the black matrix;

A plurality of through holes are formed on the metal foil layer, and the plurality of through holes are respectively arranged corresponding to the plurality of color filters;

forming a plurality of color conversion layers in the plurality of through holes;

providing a driving substrate, and forming a plurality of light emitting devices on the driving substrate;

Fixing the driving substrate on the side of the metal foil layer away from the first substrate, and making the plurality of light emitting devices respectively located in the plurality of through holes, so that the plurality of color conversion The layers respectively cover the surfaces of the plurality of light emitting devices on one side away from the driving substrate.
The method for manufacturing a display panel according to claim 8, wherein said forming a plurality of color conversion layers in the plurality of through holes respectively comprises:

A plurality of color conversion layers are respectively formed in the plurality of through holes through a scraping process.
The method for manufacturing a display panel according to claim 8, wherein the step of forming a metal foil layer on a plurality of the color filters and the black matrix specifically includes:

A metal foil layer is provided, and the metal foil layer is fixed on a side of the plurality of color filters and the black matrix away from the first substrate through an adhesive layer.
The method for manufacturing a display panel according to claim 8, wherein the material of the metal foil layer includes silver or aluminum.
The method for manufacturing a display panel according to claim 8, wherein the thickness of the metal foil layer is in the range of 20-200 μm.
The manufacturing method of the display panel according to claim 8, wherein the material of the color conversion layer comprises quantum dot material, phosphor material, phosphorescence photoluminescence material or organic photoluminescence material.
The method for manufacturing a display panel according to claim 8, wherein a cross-sectional area of the through hole is not larger than a cross-sectional area of the color filter.
The method for manufacturing a display panel according to claim 8, wherein the driving substrate includes a plurality of pixel regions arranged in rows and columns, and each row of pixel regions includes red pixel regions and green pixel regions periodically arranged in the row direction. , a blue pixel area and a compensation color pixel area, each column of pixel areas includes the red pixel area, the green pixel area, the blue pixel area and the compensation color pixel area periodically arranged in the column direction.