Display panel

Abstract

The present application provides a display panel. The display panel includes a drive substrate; a plurality of isolation components spaced apart on one side of the drive substrate, with two adjacent isolation components defining an opening; a plurality of light sources spaced apart on one side of the drive substrate, with one light source disposed within each opening; and a color conversion layer disposed within at least a portion of the opening, with one color conversion layer covering one light source. The isolation components include a reflective isolation wall disposed on one side of the drive substrate and a transparent protective layer covering the surface of the reflective isolation wall. By utilizing the reflective isolation wall and the transparent protective layer, the present application can effectively improve the luminous efficiency of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel. Background Art

[0002] In related technologies, in order to reduce crosstalk between red and green quantum dots, a black barrier is set between the red and green quantum dots of the display panel. However, the setting of the black barrier limits the luminous efficiency of the display panel, resulting in lower luminous efficiency of the display panel. Summary of the Invention

[0003] In view of this, the present application provides a display panel to improve the problem that the black barrier walls limit the luminous efficiency of the display panel.

[0004] The technical solutions adopted by this application to solve the above technical problems are:

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0006] Driver substrate;

[0007] A plurality of isolation components are spaced apart and arranged on one side of the driving substrate, and two adjacent isolation components define an opening;

[0008] A plurality of light sources are arranged at intervals on one side of the driving substrate, and one light source is arranged in one of the openings;

[0009] a color conversion layer, disposed in at least a portion of the opening, with one color conversion layer covering one light source;

[0010] The isolation component includes a reflective isolation wall and a transparent protective layer. The reflective isolation wall is arranged on one side of the driving substrate, and the transparent protective layer covers the surface of the reflective isolation wall.

[0011] In some embodiments of the present application, the reflective isolation wall includes a transparent blocking wall and a metal reflective layer, multiple transparent blocking walls are spaced apart on one side of the driving substrate, the metal reflective layer covers the surface of the transparent blocking wall, and the transparent protective layer covers the surface of the metal reflective layer facing away from the transparent blocking wall.

[0012] In some embodiments of the present application, the height of the isolation component along the thickness direction of the driving substrate is greater than 5 um, and the width of the isolation component along the cross-sectional direction of the driving substrate is not less than 0.7 um.

[0013] In some embodiments of the present application, a ratio of a height of the isolation component along a thickness direction of the driving substrate to a width of the isolation component along a cross-sectional direction of the driving substrate is greater than 5.

[0014] In some embodiments of the present application, the width of the transparent blocking wall along the cross-sectional direction of the driving substrate is not less than 0.5um, the thickness of the metal reflective layer along the cross-sectional direction of the driving substrate is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer along the cross-sectional direction of the driving substrate is in the range of 0.1um to 0.25um.

[0015] In a second aspect, an embodiment of the present application provides a display panel, including:

[0016] Driver substrate;

[0017] A plurality of light sources are spaced apart and arranged on one side of the driving substrate;

[0018] a planarization layer, provided on one side of the driving substrate and covering the plurality of light sources;

[0019] a plurality of isolation components, spaced apart and arranged on a side of the planarization layer facing away from the driving substrate, wherein two adjacent isolation components define an opening;

[0020] a color conversion layer disposed in at least a portion of the opening, and along a top-viewing direction of the display panel, one color conversion layer blocks a light-emitting side of one light source;

[0021] The isolation component includes a reflective isolation wall and a transparent protective layer. The reflective isolation wall is arranged on a side of the planarization layer away from the driving substrate, and the transparent protective layer covers the surface of the reflective isolation wall.

[0022] In some embodiments of the present application, the reflective isolation wall includes a transparent blocking wall and a metal reflective layer, and multiple transparent blocking walls are spaced apart on the side of the planarization layer away from the driving substrate. The metal reflective layer covers the surface of the transparent blocking wall, and the transparent protective layer covers the surface of the metal reflective layer away from the transparent blocking wall.

[0023] In some embodiments of the present application, the height of the isolation component along the thickness direction of the driving substrate is greater than 5 um, and the width of the isolation component along the cross-sectional direction of the driving substrate is not less than 0.7 um.

[0024] In some embodiments of the present application, a ratio of a height of the isolation component along a thickness direction of the driving substrate to a width of the isolation component along a cross-sectional direction of the driving substrate is greater than 5.

[0025] In some embodiments of the present application, the width of the transparent blocking wall along the cross-sectional direction of the driving substrate is not less than 0.5um, the thickness of the metal reflective layer along the cross-sectional direction of the driving substrate is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer along the cross-sectional direction of the driving substrate is in the range of 0.1um to 0.25um.

[0026] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0027] An embodiment of the present application provides a display panel, which mainly arranges a reflective isolation wall and a transparent protective layer on a driving substrate, and wraps the reflective isolation wall with the transparent protective layer, and uses the reflective isolation wall to reflect the light emitted by the light source so that the light can be emitted from the front of the display panel, reducing the amount of light leakage from the side of the display panel. Compared with the black blocking wall, the amount of light absorbed by the blocking wall can be reduced, and the transparent protective layer is then used to isolate the reflective isolation wall from the color conversion layer to avoid direct contact between the reflective isolation wall and the color conversion layer, resulting in the light converted by the color conversion layer being absorbed by the reflective isolation wall. That is, by setting the reflective isolation wall and the transparent protective layer, the luminous efficiency of the display panel can be effectively improved. In detail, first, the reflective isolation wall is used to reflect the light emitted by the light source and the light converted by the color conversion layer. Compared with the black barrier wall, it can effectively reduce the absorption of light by the barrier wall, thereby improving the light output rate. Based on the reflective effect of the reflective isolation wall, it can effectively avoid the side leakage of the display panel, further improving the light output rate. Secondly, by wrapping a transparent protective layer on the surface of the reflective isolation wall, the reflective isolation wall will not be in direct contact with the color conversion layer, effectively avoiding the formation of plasma excitons between the reflective isolation wall and the color conversion layer, thereby reducing the loss of light energy and improving the luminous efficiency of the color conversion layer. In summary, by setting the reflective isolation wall and the transparent protective layer, the problem of low luminous efficiency of the display panel due to the setting of the black barrier wall can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a display panel provided in an embodiment of the present application;

[0029] Figure 2 for Figure 1 Schematic diagram of the preparation process of the display panel;

[0030] Figure 3 A schematic diagram of another display panel provided in an embodiment of the present application;

[0031] Figure 4 for Figure 3 Schematic diagram of the preparation process of the display panel;

[0032] Figure 5 A comparison chart of the luminous efficiency of different display panels provided in the embodiments of the present application.

[0033] Description of reference numerals:

[0034] 100. Display panel; 110. Driver substrate; 111. Glass substrate; 112. Driver device layer; 120. Reflective isolation wall; 121. Transparent retaining wall; 122. Metal reflective layer; 130. Transparent protective layer; 131. Opening; 1311. First sub-opening; 1312. Second sub-opening; 1313. Third sub-opening; 140. Color conversion layer; 141. First quantum dot material; 142. Second quantum dot material; 150. Light source; 160. Planarization layer; 170. Color filter layer. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0037] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] See Figure 1 and Figure 2 , an embodiment of the present application provides a display panel 100, including:

[0039] a driving substrate 110;

[0040] A plurality of isolation components are spaced apart and arranged on one side of the driving substrate 110 , and two adjacent isolation components define an opening 131 ;

[0041] A plurality of light sources 150 are spaced apart and arranged on one side of the driving substrate 110 , with one light source 150 being arranged in one opening 131 ;

[0042] A color conversion layer 140 is disposed in at least a portion of the opening 131 and one color conversion layer 140 covers one light source 150 ;

[0043] The isolation component includes a reflective isolation wall 120 and a transparent protective layer 130 . The reflective isolation wall 120 is disposed on one side of the driving substrate 110 , and the transparent protective layer 130 covers the surface of the reflective isolation wall 120 .

[0044] The technical solution provided in this embodiment is mainly achieved by arranging a reflective isolation wall 120 and a transparent protective layer 130 on the driving substrate 110, and wrapping the reflective isolation wall 120 with the transparent protective layer 130, and utilizing the reflective isolation wall 120 to reflect the light emitted by the light source 150, so that the light can be emitted from the front of the display panel 100, and the amount of light leakage from the side of the display panel 100 is reduced, and compared with the black blocking wall, the amount of light absorbed by the blocking wall can also be reduced, and the transparent protective layer 130 is then utilized to isolate the reflective isolation wall 120 from the color conversion layer 140, so as to avoid direct contact between the reflective isolation wall 120 and the color conversion layer 140, resulting in the light converted by the color conversion layer 140 being absorbed by the reflective isolation wall 120, that is, by arranging the reflective isolation wall 120 and the transparent protective layer 130, the luminous efficiency of the display panel 100 can be effectively improved. Specifically, the reflective barrier 120 is used to reflect the light emitted by the light source 150 and the light converted by the color conversion layer 140. Compared to black barrier walls, this can effectively reduce the absorption of light by the barrier walls, thereby improving the light extraction efficiency. Furthermore, based on the reflective effect of the reflective barrier 120, it can effectively prevent light leakage from the sides of the display panel 100, further improving the light extraction efficiency. Secondly, by wrapping a transparent protective layer 130 on the surface of the reflective barrier 120, the reflective barrier 120 is prevented from directly contacting the color conversion layer 140, effectively preventing the formation of plasmons between the reflective barrier 120 and the color conversion layer 140, thereby reducing light energy loss and improving the luminous efficiency of the color conversion layer 140. In summary, the provision of the reflective barrier 120 and the transparent protective layer 130 can effectively improve the problem of low luminous efficiency of the display panel 100 caused by the provision of the black barrier walls.

[0045] It should be noted that, in the preparation of the color conversion layer 140, in some embodiments, the color conversion layer 140 can be made of a QD (Quantum Dot) photoresist material by photolithography. In other embodiments, the color conversion layer 140 can be made of a QD ink material and printed into the opening 131 by inkjet printing technology. In other embodiments, the color conversion layer 140 can be made of a QD composite material and processed into a pixel structure by electrophoretic deposition. In this embodiment, it is necessary to process pixel electrodes on the drive substrate 110, and then use electrophoretic deposition to deposit quantum dots on the pixel electrodes to obtain a pixel structure. Among them, QD photoresist material refers to a photoresist containing quantum dots, which is mainly used to form a pattern with photoelectric properties in the photolithography process. QD ink material refers to a liquid ink containing quantum dots, which is generally used for inkjet printing, coating and other deposition processes to form a quantum dot pattern on a substrate. QD composite material refers to a composite material formed by mixing quantum dots with other matrix materials (such as polymers, glass or other inorganic materials).

[0046] In some embodiments, see Figure 1 and Figure 2 The driving substrate 110 includes a glass substrate 111 and a driving device layer 112. The driving device layer 112 is provided on the glass substrate 111. The light source 150 is provided on the driving device layer 112 and is electrically connected to the driving device layer 112. The driving device layer 112 is mainly used to drive the light source 150 to emit light.

[0047] In some embodiments, see Figure 1 and Figure 2The reflective isolation wall 120 includes a plurality of transparent barriers 121 and a metal reflective layer 122. The plurality of transparent barriers 121 are spaced apart on one side of the drive substrate 110. Light from the light source 150 is emitted between two adjacent transparent barriers 121. Compared to black barriers in related art, the transparent barriers 121 absorb less light, thereby improving luminous efficiency. Furthermore, the transparent barriers 121 can have a narrower line width than black barriers. Here, the line width of the transparent barriers 121 refers to the width of the transparent barriers 121 along the cross-section of the drive substrate 110. The line width of the barrier affects the size of the opening 131 of the display panel 100. A narrower line width results in a larger opening 131, while a wider line width results in a smaller opening 131. In the related art, black barriers are used to effectively reduce interference between quantum dots of different colors. However, the black barriers are made of black photoresist material, which has low lithographic resolution and large line width, resulting in a smaller opening 131. In particular, when the thickness of the color conversion layer 140 is increased to improve the luminance of the display panel 100, the minimum line width of the black barriers increases with the thickness, resulting in an inability to reduce the pixel size of the display panel 100, thereby preventing the production of a high-resolution display panel 100 while maintaining high light efficiency. The transparent barriers 121 used in this embodiment, due to their excellent light transmittance, low scattering properties, high resolution, and high exposure accuracy, can maintain a narrow line width even when the thickness of the color conversion layer 140 is increased.

[0048] For example:

[0049] In related art, in order to maintain the luminous efficiency of the display panel 100, the thickness range of the color conversion layer 140 is set between 5um and 10um, and the minimum line width of the black baffle is 5um, resulting in the inability to reduce the pixel size and unsatisfactory resolution. In this embodiment, the thickness of the color conversion layer 140 can be greater than 5um, and the line width of the transparent baffle 121 is less than 1.5um, so that it can not only ensure the thickness requirement of the color conversion layer 140, but also meet the resolution requirement. When the thickness of the color conversion layer 140 is greater than 5um and the line width of the transparent baffle 121 is less than 1.5um, the resolution of the display panel 100 can reach 10,000PPI. In terms of luminous efficiency, the light efficiency of the transparent baffle 121 is 2.5 times that of the black baffle. For details, please refer to Figure 5 , Figure 5Schematic diagram comparing the luminous efficiency of different display panels. The first retaining wall structure is to set a color conversion layer on the entire surface of one side of the driving substrate and cover the light source, that is, no retaining wall structure is set. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 2100 nit, and the luminous efficiency is 210%. The second retaining wall structure is to set a black retaining wall structure on one side of the driving substrate and set a color conversion layer between adjacent black retaining wall structures. The color conversion layer covers the light source. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 980 nit, and the luminous efficiency is 98%. The third retaining wall structure is the isolation component used in the aforementioned embodiment. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 2500 nit, and the luminous efficiency is 250%.

[0050] Furthermore, a metal reflective layer 122 is wrapped around the surface of the transparent baffle 121, and a transparent protective layer 130 is wrapped around the surface of the metal reflective layer 122 facing away from the transparent baffle 121. By wrapping the metal reflective layer 122 around the surface of the transparent baffle 121, light emitted by the light source 150 and light converted by the color conversion layer 140 are reflected by the metal reflective layer 122, ensuring that light always exits from the front of the display panel 100, effectively preventing light leakage from the sides of the display panel 100. Furthermore, by wrapping the transparent protective layer 130 around the surface of the metal reflective layer 122 facing away from the transparent baffle 121, the metal reflective layer 122 is isolated from the color conversion layer 140, preventing direct contact between the metal reflective layer 122 and the color conversion layer 140 and the generation of plasmons. This reduces light energy loss and improves the luminous efficiency of the color conversion layer 140. In addition, a metal reflective layer 122 is laid on one side of the driving substrate 110 and covers the reflective isolation wall 120, and then a transparent protective layer 130 is wrapped on the metal reflective layer 122 to form etching protection for the metal reflective layer 122. The metal reflective layer 122 is then etched and patterned to etch away the metal reflective layer 122 outside the coverage of the transparent protective layer 130. During the entire process, the transparent protective layer 130 can protect part of the metal reflective layer 122 from being etched.

[0051] It should be noted that transparent photoresist material can be used for both the transparent protective layer 130 and the transparent barrier ribs 121 .

[0052] In some embodiments, the isolation assembly has a height greater than 5 μm along the thickness direction of the drive substrate 110 and a width no less than 0.7 μm along the cross-section of the drive substrate 110. Compared to related art, this embodiment has a taller height and narrower line width, resulting in high luminous efficiency and higher resolution. Specifically, in related art, to ensure high luminous efficiency of the display panel 100, the thickness of the color conversion layer 140 must be controlled to be above 5 μm, as luminous efficiency is positively correlated with the thickness of the color conversion layer 140. Since the thickness of the color conversion layer 140 is above 5 μm, the line width of the black barrier wall is at least 5 μm, resulting in a smaller area of ​​the opening 131 defined by the black barrier wall, which affects the resolution of the display panel 100. In this embodiment, by using transparent barrier walls 121 and leveraging their high aspect ratio, the barrier wall line width is limited to a smaller range while ensuring a high thickness of the color conversion layer 140. In this embodiment, the transparent barrier wall 121 has an aspect ratio greater than 5. That is, the ratio of the height of the transparent barrier wall 121 in the thickness direction of the drive substrate 110 to the width of the transparent barrier wall 121 in the cross-sectional direction of the drive substrate 110 is greater than 5. For example, in related art, the aspect ratio of the color conversion layer 140 is 1:2. When the thickness of the color conversion layer 140 is 5 μm, the line width of the color conversion layer 140 is 10 μm. In this embodiment, the color conversion layer 140 is confined within the opening 131 defined by the isolation element, thereby utilizing the resolution of the isolation element to enhance the resolution of the color conversion layer 140. When the line width of the isolation element is between 0.5 μm and 1 μm, the size of the opening 131 defined by two adjacent isolation elements is no less than 2 μm. The larger the opening 131, the higher the pixel aperture ratio. If the opening 131 is 2 μm, the pixel size is 2.5 μm, and the PPI (pixels per inch) is 10160. If the size of the opening 131 is 4 μm and the line width of the isolation element is 1 μm, the pixel size is 5 μm and the PPI is 5080.

[0053] In some embodiments, the transparent barrier 121 has a width of no less than 0.5 μm along the cross-sectional direction of the drive substrate 110, the metal reflective layer 122 has a thickness in the range of 0.02 μm to 0.1 μm along the cross-sectional direction of the drive substrate 110, and the transparent protective layer 130 has a thickness in the range of 0.1 μm to 0.25 μm along the cross-sectional direction of the drive substrate 110. In other words, the isolation assembly plus the transparent protective layer 130 has a line width in the range of 0.62 μm to 0.85 μm along the cross-sectional direction of the drive substrate 110. It should be noted that when the metal reflective layer 122 has a thickness in the cross-sectional direction of the drive substrate 110 greater than 0.05 μm, it can reflect more than 99% of visible light. This ensures that the line width of the isolation assembly is as narrow as possible while also improving luminous efficiency and preventing light leakage from the sides of the display panel 100.

[0054] In some embodiments, see Figure 1 The color conversion layer 140 includes a first quantum dot material 141 and a second quantum dot material 142. The color of the first quantum dot material 141, the color of the second quantum dot material 142, and the color of the light emitted by the light source 150 are one of three colors: red, blue, and green, and are different from each other. In this embodiment, the color of the first quantum dot material 141 is red, the color of the second quantum dot material 142 is green, and the color of the light emitted by the light source 150 is blue. The metal reflective layer 122 can reflect these three colors of light, thereby reducing crosstalk between lights of different colors and also improving the light extraction efficiency of the display panel 100. Of course, in other embodiments, the color of the first quantum dot material 141 can also be green or blue, the color of the second quantum dot material 142 can be red or blue, and the color of the light emitted by the light source 150 can be green or red. However, it should be noted that in this embodiment, the first quantum dot material 141 is red, the second quantum dot material 142 is green, and the color of the light emitted by the light source 150 is blue. Compared with other color combinations, the red and green quantum dots have a higher conversion efficiency for blue light, and the blue photon energy is higher, which can more effectively excite the red and green quantum dots. The spectrum of blue light is better matched with the absorption spectrum of red and green quantum dots, so that the blue light energy can be more efficiently absorbed and converted into red and green light, thereby improving the conversion efficiency and luminous efficiency.

[0055] Furthermore, the opening 131 includes a plurality of first sub-openings 1311, a second sub-opening 1312, and a plurality of third sub-openings 1313. A portion of the plurality of light sources 150 is defined as a first light source, a portion of the light sources is defined as a second light source, and a portion of the light sources is defined as a third light source. The first quantum dot material 141 and the first light source are both disposed within the first sub-opening 1311, and the first quantum dot material 141 covers the light-emitting side of the first light source, so that the light emitted by the first light source within the first sub-opening 1311 can effectively excite the first quantum dot material 141 to emit light. The second quantum dot material 142 and the second light source are both disposed within the second sub-opening 1312, and the second quantum dot material 142 covers the light-emitting side of the second light source, so that the light emitted by the second light source within the second sub-opening 1312 can effectively excite the second quantum dot material 142 to emit light. The third light source is disposed in the third sub-opening 1313 . A color conversion layer 140 is disposed inside the opening 131 . That is, there is no quantum dot material in the opening 131 . The blue light emitted by the third light source can be mixed with the converted red and green light to form the three primary colors.

[0056] In some embodiments, the display panel 100 further includes a color filter layer 170, which covers the side of the color conversion layer 140 facing away from the driving substrate 110. In other embodiments, the color conversion layer 140 has a thickness greater than 5 μm in the thickness direction of the driving substrate 110, and the transmittance of light emitted by the light source 150 through the color conversion layer 140 is less than 1%. In this case, the color filter layer 170 may not be provided on the side of the color conversion layer 140 facing away from the driving substrate 110.

[0057] It should be noted that the color filter layer 170 is only set at the first sub-opening 1311 and the second sub-opening 1312 to cover the first quantum dot material 141 and the second quantum dot material 142. For the third sub-opening 1313, the color filter layer 170 is not set to avoid the color filter layer 170 interfering with the light emitted from the light source 150 to the third sub-opening 1313.

[0058] See Figure 3 and Figure 4 , an embodiment of the present application further provides another display panel 100, comprising:

[0059] a driving substrate 110;

[0060] A plurality of light sources 150 are spaced apart and arranged on one side of the driving substrate 110;

[0061] a planarization layer 160 , disposed on one side of the driving substrate 110 and covering the plurality of light sources 150 ;

[0062] A plurality of isolation components are spaced apart and disposed on a side of the planarization layer 160 facing away from the driving substrate 110 , with two adjacent isolation components defining an opening 131 ;

[0063] The color conversion layer 140 is disposed in at least a portion of the opening 131 , and along the top-viewing direction of the display panel 100 , one color conversion layer 140 blocks the light-emitting side of one light source 150 ;

[0064] The isolation component includes a reflective isolation wall 120 and a transparent protective layer 130 . The reflective isolation wall 120 is disposed on a side of the planarization layer 160 away from the driving substrate 110 . The transparent protective layer 130 covers the surface of the reflective isolation wall 120 .

[0065] The technical solution provided in this embodiment is mainly achieved by arranging a reflective isolation wall 120 and a transparent protective layer 130 on the flattening layer 160, and making the transparent protective layer 130 wrap the reflective isolation wall 120, and utilizing the reflective isolation wall 120 to reflect the light emitted by the light source 150, so that the light can be emitted from the front of the display panel 100, and the amount of light leakage from the side of the display panel 100 is reduced, and compared with the black blocking wall, the amount of light absorbed by the blocking wall can also be reduced, and the transparent protective layer 130 is then utilized to isolate the reflective isolation wall 120 from the color conversion layer 140, so as to avoid direct contact between the reflective isolation wall 120 and the color conversion layer 140, resulting in the light converted by the color conversion layer 140 being absorbed by the reflective isolation wall 120, that is, by arranging the reflective isolation wall 120 and the transparent protective layer 130, the luminous efficiency of the display panel 100 can be effectively improved. Specifically, the reflective barrier 120 is used to reflect the light emitted by the light source 150 and the light converted by the color conversion layer 140. Compared to black barrier walls, this can effectively reduce the absorption of light by the barrier walls, thereby improving the light extraction efficiency. Furthermore, based on the reflective effect of the reflective barrier 120, it can effectively prevent light leakage from the sides of the display panel 100, further improving the light extraction efficiency. Secondly, by wrapping a transparent protective layer 130 on the surface of the reflective barrier 120, the reflective barrier 120 is prevented from directly contacting the color conversion layer 140, effectively preventing the formation of plasmons between the reflective barrier 120 and the color conversion layer 140, thereby reducing light energy loss and improving the luminous efficiency of the color conversion layer 140. In summary, the provision of the reflective barrier 120 and the transparent protective layer 130 can effectively improve the problem of low luminous efficiency of the display panel 100 caused by the provision of the black barrier walls.

[0066] It should be noted that, in the preparation of the color conversion layer 140, in some embodiments, the color conversion layer 140 can be made of a QD (Quantum Dot) photoresist material by photolithography. In other embodiments, the color conversion layer 140 can be made of a QD ink material and printed into the opening 131 by inkjet printing technology. In other embodiments, the color conversion layer 140 can be made of a QD composite material and processed into a pixel structure by electrophoretic deposition. In this embodiment, it is necessary to process pixel electrodes on the drive substrate 110, and then use electrophoretic deposition to deposit quantum dots on the pixel electrodes to obtain a pixel structure. Among them, QD photoresist material refers to a photoresist containing quantum dots, which is mainly used to form a pattern with photoelectric properties in the photolithography process. QD ink material refers to a liquid ink containing quantum dots, which is generally used for inkjet printing, coating and other deposition processes to form a quantum dot pattern on a substrate. QD composite material refers to a composite material formed by mixing quantum dots with other matrix materials (such as polymers, glass or other inorganic materials).

[0067] In some embodiments, see Figure 3 and Figure 4 The driving substrate 110 includes a glass substrate 111 and a driving device layer 112. The driving device layer 112 is provided on the glass substrate 111. The light source 150 is provided on the driving device layer 112 and is electrically connected to the driving device layer 112. The driving device layer 112 is mainly used to drive the light source 150 to emit light.

[0068] In some embodiments, see Figure 3 and Figure 4The reflective isolation wall 120 includes a plurality of transparent barriers 121 and a metal reflective layer 122. The plurality of transparent barriers 121 are spaced apart on one side of the drive substrate 110. Light from the light source 150 is emitted between two adjacent transparent barriers 121. Compared to black barriers in related art, the transparent barriers 121 absorb less light, thereby improving luminous efficiency. Furthermore, the transparent barriers 121 can have a narrower line width than black barriers. Here, the line width of the transparent barriers 121 refers to the width of the transparent barriers 121 along the cross-section of the drive substrate 110. The line width of the barrier affects the size of the opening 131 of the display panel 100. A narrower line width results in a larger opening 131, while a wider line width results in a smaller opening 131. In the related art, black barriers are used to effectively reduce interference between quantum dots of different colors. However, the black barriers are made of black photoresist material, which has low lithographic resolution and large line width, resulting in a smaller opening 131. In particular, when the thickness of the color conversion layer 140 is increased to improve the luminance of the display panel 100, the minimum line width of the black barriers increases with the thickness, resulting in an inability to reduce the pixel size of the display panel 100, thereby preventing the production of a high-resolution display panel 100 while maintaining high light efficiency. The transparent barriers 121 used in this embodiment, due to their excellent light transmittance, low scattering properties, high resolution, and high exposure accuracy, can maintain a narrow line width even when the thickness of the color conversion layer 140 is increased.

[0069] For example:

[0070] In related art, in order to maintain the luminous efficiency of the display panel 100, the thickness range of the color conversion layer 140 is set between 5um and 10um, and the minimum line width of the black baffle is 5um, resulting in the inability to reduce the pixel size and unsatisfactory resolution. In this embodiment, the thickness of the color conversion layer 140 can be greater than 5um, and the line width of the transparent baffle 121 is less than 1.5um, so that it can not only ensure the thickness requirement of the color conversion layer 140, but also meet the resolution requirement. When the thickness of the color conversion layer 140 is greater than 5um and the line width of the transparent baffle 121 is less than 1.5um, the resolution of the display panel 100 can reach 10,000PPI. In terms of luminous efficiency, the light efficiency of the transparent baffle 121 is 2.5 times that of the black baffle. For details, please refer to Figure 5 , Figure 5Schematic diagram comparing the luminous efficiency of different display panels. The first retaining wall structure is to set a color conversion layer on the entire surface of one side of the driving substrate and cover the light source, that is, no retaining wall structure is set. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 2100 nit, and the luminous efficiency is 210%. The second retaining wall structure is to set a black retaining wall structure on one side of the driving substrate and set a color conversion layer between adjacent black retaining wall structures. The color conversion layer covers the light source. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 980 nit, and the luminous efficiency is 98%. The third retaining wall structure is the isolation component used in the aforementioned embodiment. When the brightness of the blue light emitted by the light source is 1000 nit, the brightness of the light converted by the color conversion layer is 2500 nit, and the luminous efficiency is 250%.

[0071] Furthermore, a metal reflective layer 122 is wrapped around the surface of the transparent baffle 121, and a transparent protective layer 130 is wrapped around the surface of the metal reflective layer 122 facing away from the transparent baffle 121. By wrapping the metal reflective layer 122 around the surface of the transparent baffle 121, light emitted by the light source 150 and light converted by the color conversion layer 140 are reflected by the metal reflective layer 122, ensuring that light always exits from the front of the display panel 100, effectively preventing light leakage from the sides of the display panel 100. Furthermore, by wrapping the transparent protective layer 130 around the surface of the metal reflective layer 122 facing away from the transparent baffle 121, the metal reflective layer 122 is isolated from the color conversion layer 140, preventing direct contact between the metal reflective layer 122 and the color conversion layer 140 and the generation of plasmons. This reduces light energy loss and improves the luminous efficiency of the color conversion layer 140. In addition, a metal reflective layer 122 is laid on one side of the driving substrate 110 and covers the reflective isolation wall 120, and then a transparent protective layer 130 is wrapped on the metal reflective layer 122 to form etching protection for the metal reflective layer 122. The metal reflective layer 122 is then etched and patterned to etch away the metal reflective layer 122 outside the coverage of the transparent protective layer 130. During the entire process, the transparent protective layer 130 can protect part of the metal reflective layer 122 from being etched.

[0072] It should be noted that transparent photoresist material can be used for both the transparent protective layer 130 and the transparent barrier ribs 121 .

[0073] In some embodiments, the isolation assembly has a height greater than 5 μm along the thickness direction of the drive substrate 110 and a width no less than 0.7 μm along the cross-section of the drive substrate 110. Compared to related art, this embodiment has a taller height and narrower line width, resulting in high luminous efficiency and higher resolution. Specifically, in related art, to ensure high luminous efficiency of the display panel 100, the thickness of the color conversion layer 140 must be controlled to be above 5 μm, as luminous efficiency is positively correlated with the thickness of the color conversion layer 140. Since the thickness of the color conversion layer 140 is above 5 μm, the line width of the black barrier wall is at least 5 μm, resulting in a smaller area of ​​the opening 131 defined by the black barrier wall, which affects the resolution of the display panel 100. In this embodiment, by using transparent barrier walls 121 and leveraging their high aspect ratio, the barrier wall line width is limited to a smaller range while ensuring a high thickness of the color conversion layer 140. In this embodiment, the transparent barrier wall 121 has an aspect ratio greater than 5. That is, the ratio of the height of the transparent barrier wall 121 in the thickness direction of the drive substrate 110 to the width of the transparent barrier wall 121 in the cross-sectional direction of the drive substrate 110 is greater than 5. For example, in related art, the aspect ratio of the color conversion layer 140 is 1:2. When the thickness of the color conversion layer 140 is 5 μm, the line width of the color conversion layer 140 is 10 μm. In this embodiment, the color conversion layer 140 is confined within the opening 131 defined by the isolation element, thereby utilizing the resolution of the isolation element to enhance the resolution of the color conversion layer 140. When the line width of the isolation element is between 0.5 μm and 1 μm, the size of the opening 131 defined by two adjacent isolation elements is no less than 2 μm. The larger the opening 131, the higher the pixel aperture ratio. If the opening 131 is 2 μm, the pixel size is 2.5 μm, and the PPI (pixels per inch) is 10160. If the size of the opening 131 is 4 μm and the line width of the isolation element is 1 μm, the pixel size is 5 μm and the PPI is 5080.

[0074] In some embodiments, the transparent barrier 121 has a width of no less than 0.5 μm along the cross-sectional direction of the drive substrate 110, the metal reflective layer 122 has a thickness in the range of 0.02 μm to 0.1 μm along the cross-sectional direction of the drive substrate 110, and the transparent protective layer 130 has a thickness in the range of 0.1 μm to 0.25 μm along the cross-sectional direction of the drive substrate 110. In other words, the isolation assembly plus the transparent protective layer 130 has a line width in the range of 0.62 μm to 0.85 μm along the cross-sectional direction of the drive substrate 110. It should be noted that when the metal reflective layer 122 has a thickness in the cross-sectional direction of the drive substrate 110 greater than 0.05 μm, it can reflect more than 99% of visible light. This ensures that the line width of the isolation assembly is as narrow as possible while also improving luminous efficiency and preventing light leakage from the sides of the display panel 100.

[0075] In some embodiments, see Figure 3 The color conversion layer 140 includes a first quantum dot material 141 and a second quantum dot material 142. The color of the first quantum dot material 141, the color of the second quantum dot material 142, and the color of the light emitted by the light source 150 are one of three colors: red, blue, and green, and are different from each other. In this embodiment, the color of the first quantum dot material 141 is red, the color of the second quantum dot material 142 is green, and the color of the light emitted by the light source 150 is blue. The metal reflective layer 122 can reflect these three colors of light, thereby reducing crosstalk between lights of different colors and also improving the light extraction efficiency of the display panel 100. Of course, in other embodiments, the color of the first quantum dot material 141 can also be green or blue, the color of the second quantum dot material 142 can be red or blue, and the color of the light emitted by the light source 150 can be green or red. However, it should be noted that in this embodiment, the first quantum dot material 141 is red, the second quantum dot material 142 is green, and the color of the light emitted by the light source 150 is blue. Compared with other color combinations, the red and green quantum dots have a higher conversion efficiency for blue light, and the blue photon energy is higher, which can more effectively excite the red and green quantum dots. The spectrum of blue light is better matched with the absorption spectrum of red and green quantum dots, so that the blue light energy can be more efficiently absorbed and converted into red and green light, thereby improving the conversion efficiency and luminous efficiency.

[0076] In some embodiments, see Figure 3 and Figure 4The opening 131 includes a plurality of first sub-openings 131, a second sub-opening 131, and a plurality of third sub-openings 1313. A portion of the plurality of light sources 150 is defined as a first light source, a portion as a second light source, and a portion as a third light source. A first quantum dot material 141 is disposed within a first sub-opening 1311 and, along the top-viewing direction of the display panel 100, blocks the light-emitting side of the first light source, allowing light emitted from the light source 150 to enter the first sub-opening 1311 and be converted by the first quantum dot material 141 into light of the same color as the first quantum dot material 141. Similarly, a second quantum dot material 142 is disposed within a second sub-opening 1312 and, along the top-viewing direction of the display panel 100, blocks the light-emitting side of a second light source, allowing light emitted by the light source 150 to enter the second sub-opening 1312 and be converted by the second quantum dot material 142 into light of the same color as the second quantum dot material 142. Along the top-viewing direction of the display panel 100, a third light source 150 is located within the outline of a third sub-opening 1313, allowing light emitted by the third light source to directly mix with the light converted by the color conversion layer 140, thereby achieving multi-color display on the display panel 100.

[0077] In some embodiments, the display panel 100 further includes a color filter layer 170, which covers the side of the color conversion layer 140 facing away from the driving substrate 110. In other embodiments, the color conversion layer 140 has a thickness greater than 5 μm in the thickness direction of the driving substrate 110, and the transmittance of light emitted by the light source 150 through the color conversion layer 140 is less than 1%. In this case, the color filter layer 170 may not be provided on the side of the color conversion layer 140 facing away from the driving substrate 110.

[0078] It should be noted that the color filter layer 170 is only set at the first sub-opening 1311 and the second sub-opening 1312 to cover the first quantum dot material 141 and the second quantum dot material 142. For the third sub-opening 1313, the color filter layer 170 is not set to avoid the color filter layer 170 interfering with the light emitted from the light source 150 to the third sub-opening 1313.

[0079] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0080] Similarly, it should be noted that, in order to simplify the description of the present disclosure and thus facilitate understanding of one or more embodiments of the present disclosure, the foregoing description of the embodiments of the present disclosure sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the present disclosure requires more features than those recited in the claims. In fact, the features of the embodiments may be fewer than the total features of the individual embodiments disclosed above.

Claims

1. A display panel, characterized in that: include: Driver substrate; A plurality of isolation components are spaced apart and arranged on one side of the driving substrate, and two adjacent isolation components define an opening; A plurality of light sources are arranged at intervals on one side of the driving substrate, and one light source is arranged in one of the openings; a color conversion layer, disposed in at least a portion of the opening, with one color conversion layer covering one light source; The isolation component includes a reflective isolation wall and a transparent protective layer, wherein the reflective isolation wall is provided on one side of the driving substrate, and the transparent protective layer covers the surface of the reflective isolation wall. The reflective isolation wall includes a transparent baffle wall and a metal reflective layer, and the metal reflective layer covers the surface of the transparent baffle wall. The height of the isolation component along the thickness direction of the driving substrate is greater than 5 μm, and the width of the isolation component along the cross-sectional direction of the driving substrate is not less than 0.7 μm; The width of the transparent barrier along the cross-sectional direction of the driving substrate is not less than 0.5um, the thickness of the metal reflective layer along the cross-sectional direction of the driving substrate is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer along the cross-sectional direction of the driving substrate is in the range of 0.1um to 0.25um.

2. The display panel according to claim 1, wherein A plurality of transparent blocking walls are spaced apart on one side of the driving substrate, and the transparent protective layer covers the surface of the metal reflective layer away from the transparent blocking walls.

3. The display panel according to claim 1, wherein A ratio of a height of the isolation component along a thickness direction of the driving substrate to a width of the isolation component along a cross-sectional direction of the driving substrate is greater than 5.

4. A display panel, characterized in that: include: Driver substrate; A plurality of light sources are spaced apart and arranged on one side of the driving substrate; a planarization layer, provided on one side of the driving substrate and covering the plurality of light sources; a plurality of isolation components, spaced apart and arranged on a side of the planarization layer facing away from the driving substrate, wherein two adjacent isolation components define an opening; a color conversion layer disposed in at least a portion of the opening, and along a top-viewing direction of the display panel, one color conversion layer blocks a light-emitting side of one light source; The isolation assembly includes a reflective isolation wall and a transparent protective layer. The reflective isolation wall is provided on the side of the planarization layer facing away from the drive substrate. The transparent protective layer covers the surface of the reflective isolation wall. The reflective isolation wall includes a transparent blocking wall and a metal reflective layer. The metal reflective layer covers the surface of the transparent blocking wall. The height of the isolation component along the thickness direction of the driving substrate is greater than 5 μm, and the width of the isolation component along the cross-sectional direction of the driving substrate is not less than 0.7 μm; The width of the transparent barrier along the cross-sectional direction of the driving substrate is not less than 0.5um, the thickness of the metal reflective layer along the cross-sectional direction of the driving substrate is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer along the cross-sectional direction of the driving substrate is in the range of 0.1um to 0.25um.

5. The display panel according to claim 4, wherein: A plurality of transparent blocking walls are spaced apart on a side of the planarization layer away from the driving substrate, and the transparent protective layer covers a surface of the metal reflective layer away from the transparent blocking walls.

6. The display panel according to claim 4, wherein: A ratio of a height of the isolation component along a thickness direction of the driving substrate to a width of the isolation component along a cross-sectional direction of the driving substrate is greater than 5.

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