Display panel

Abstract

The invention provides a display panel. The display panel includes a driving substrate; the multiple isolation assemblies are arranged on one side of the driving substrate at intervals, and an opening is defined by every two adjacent isolation assemblies; the plurality of luminous sources are arranged on one side of the driving substrate at intervals, and one luminous source is arranged in one opening; the color conversion layers are arranged in at least part of the openings, and one color conversion layer covers one light emitting source; wherein the isolation assembly comprises a reflective isolation wall and a transparent protection layer, the reflective isolation wall is arranged on one side of the driving substrate, and the transparent protection layer covers the surface of the reflective isolation wall. According to the display panel, the light-emitting efficiency of the display panel can be effectively improved by utilizing the reflective isolation wall and the transparent protection layer.

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 the related art, in order to reduce the 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 light emitting efficiency of the display panel.

[0004] The technical solution adopted by this application to solve the above technical problems is:

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

[0006] Driver substrate;

[0007] A plurality of isolation components are arranged at intervals 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 of the light sources is arranged in one of the openings;

[0009] A color conversion layer is disposed in at least a portion of the opening and one of the color conversion layers covers one of the light sources;

[0010] Wherein, 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 baffle wall and a metal reflective layer, a plurality of the transparent baffle walls are spaced apart on one side of the driving substrate, the metal reflective layer covers the surface of the transparent baffle wall, and the transparent protective layer covers the surface of the metal reflective layer facing away from the transparent baffle 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 between a height of the isolation component along a thickness direction of the driving substrate and 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 baffle 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 arranged at intervals on one side of the driving substrate;

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

[0019] A plurality of isolation components are arranged at intervals on a side of the planarization layer away from the driving substrate, and two adjacent isolation components define an opening;

[0020] A color conversion layer is disposed in at least a portion of the opening, and along the top-viewing direction of the display panel, one color conversion layer blocks the 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, a plurality of the 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 between a height of the isolation component along a thickness direction of the driving substrate and 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 baffle 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 is mainly achieved by arranging a reflective isolation wall and a transparent protective layer on a driving substrate, and wrapping the reflective isolation wall with the transparent protective layer. The reflective isolation wall is used to reflect the light emitted by the light source, so that the light can be emitted from the front of the display panel, thereby reducing the amount of light leakage from the side of the display panel. Compared with the black baffle wall, the amount of light absorbed by the baffle wall can be reduced. 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, firstly, 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 baffle wall, it can effectively reduce the absorption of light by the baffle 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 excitation 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 baffle 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 A schematic diagram showing 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 A schematic diagram showing 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, driving substrate; 111, glass substrate; 112, driving 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 film 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 words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

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

[0038] See also 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 arranged at intervals 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 disposed at intervals on one side of the driving substrate 110 , and one light source 150 is disposed 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 to set a reflective isolation wall 120 and a transparent protective layer 130 on the driving substrate 110, and make the transparent protective layer 130 wrap the reflective isolation wall 120, and use 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 side light leakage of the display panel 100 is reduced, and compared with the black baffle wall, the absorption of light by the baffle wall can also be reduced, and then the reflective isolation wall 120 is isolated from the color conversion layer 140 by the transparent protective layer 130, so as to avoid the 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 setting the reflective isolation wall 120 and the transparent protective layer 130, the luminous efficiency of the display panel 100 can be effectively improved. In detail, firstly, the reflective isolation wall 120 is used to reflect the light emitted by the light source 150 and the light converted by the color conversion layer 140. Compared with the black baffle, the absorption of light by the baffle can be effectively reduced, thereby improving the light extraction rate. Based on the reflective effect of the reflective isolation wall 120, the side leakage of the display panel 100 can be effectively avoided, further improving the light extraction rate. Secondly, by wrapping a layer of transparent protective layer 130 on the surface of the reflective isolation wall 120, the reflective isolation wall 120 will not be in direct contact with the color conversion layer 140, effectively avoiding the formation of plasma excitation between the reflective isolation wall 120 and the color conversion layer 140, thereby reducing the loss of light energy and improving the luminous efficiency of the color conversion layer 140. In summary, by setting the reflective isolation wall 120 and the transparent protective layer 130, the problem of low luminous efficiency of the display panel 100 caused by the setting of the black baffle can be effectively improved.

[0045] It should be noted that, for the preparation of the color conversion layer 140, in some embodiments, the color conversion layer 140 can be made of QD (Quantum Dot) photoresist material by photolithography. In other embodiments, the color conversion layer 140 can be made of 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 QD composite material, and the pixel structure is obtained by electrophoretic deposition. In this embodiment, it is necessary to process pixel electrodes on the driving substrate 110, and then use electrophoretic deposition to deposit quantum dots on the pixel electrodes to obtain the 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 usually used for inkjet printing, coating and other deposition processes to form quantum dot patterns 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 disposed on the glass substrate 111. The light source 150 is disposed 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 baffles 121 and a metal reflective layer 122. The plurality of transparent baffles 121 are arranged at intervals on one side of the driving substrate 110. The light emission direction of the light source 150 is toward between two adjacent transparent baffles 121. Compared with the black baffles in the related art, the transparent baffles 121 absorb less light, thereby improving the luminous efficiency. In addition, the transparent baffles 121 can have a narrower line width than the black baffles. Here, the line width of the transparent baffles 121 refers to the width of the transparent baffles 121 in the cross-sectional direction of the driving substrate 110. The line width of the baffles will affect the size of the opening 131 of the display panel 100. The narrower the line width, the larger the opening 131, and the wider the line width, the smaller the opening 131. In the related art, the interference between quantum dots of different colors is effectively reduced by using black baffles, but the black baffles are made of black photoresist material, and the photolithography resolution is low and the line width is large, which will result in a smaller opening 131. In particular, when the thickness of the color conversion layer 140 is increased to improve the luminous brightness of the display panel 100, the minimum line width of the black baffles will increase with the increase of the thickness, resulting in the inability to reduce the pixel size of the display panel 100, thereby failing to obtain a high-resolution display panel 100 while maintaining high light efficiency. The transparent baffles 121 used in this embodiment have good light transmittance, low scattering, high resolution and high exposure accuracy, so that the transparent baffles 121 can still maintain a narrow line width when the thickness of the color conversion layer 140 increases.

[0048] For example:

[0049] In the 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 10000PPI. 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 for 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 1000nit, the brightness of the light converted by the color conversion layer is 2100nit, 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 1000nit, the brightness of the light converted by the color conversion layer is 980nit, 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 1000nit, the brightness of the light converted by the color conversion layer is 2500nit, and the luminous efficiency is 250%.

[0050] Furthermore, the metal reflective layer 122 is wrapped around the surface of the transparent baffle 121, and the transparent protective layer 130 is wrapped around the surface of the metal reflective layer 122 away from the transparent baffle 121. By wrapping the metal reflective layer 122 around the surface of the transparent baffle 121, the light emitted by the light source 150 and the light converted by the color conversion layer 140 are reflected by the metal reflective layer 122, so that the light is always emitted from the front of the display panel 100, effectively avoiding light leakage from the side of the display panel 100. Then, by wrapping the surface of the metal reflective layer 122 away from the transparent baffle 121 with the transparent protective layer 130, the metal reflective layer 122 is isolated from the color conversion layer 140, avoiding direct contact between the metal reflective layer 122 and the color conversion layer 140 to generate plasmons, thereby reducing the loss of light energy and improving the luminous efficiency of the color conversion layer 140. In addition, the 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, and then the metal reflective layer 122 is etched and patterned to etch away the metal reflective layer 122 outside the coverage of the transparent protective layer 130. During the whole 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 wall 121 .

[0052] In some embodiments, the height of the isolation component along the thickness direction of the driving substrate 110 is greater than 5um, and the width along the cross-sectional direction of the driving substrate 110 is not less than 0.7um. Compared with the related art, the isolation component of this embodiment has a higher height and a narrower line width, so that the isolation component has a high luminous efficiency and a higher resolution. In detail, in the related art, in order to ensure that the display panel 100 has a high luminous efficiency, it is necessary to control the thickness range of the color conversion layer 140 to be above 5um, because the 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 5um, the line width of the black baffle is at least 5um, resulting in a small area of ​​the opening 131 defined by the black baffle, which affects the resolution of the display panel 100. In this embodiment, by using a transparent baffle 121 and utilizing the high aspect ratio of the transparent baffle 121, the line width of the baffle is limited to a smaller range while ensuring that the color conversion layer 140 has a high thickness. The aspect ratio of the transparent baffle 121 in this embodiment is greater than 5, that is, the ratio of the height of the transparent baffle 121 in the thickness direction of the driving substrate 110 to the width of the transparent baffle 121 in the cross-sectional direction of the driving substrate 110 is greater than 5. For example: in the related art, the aspect ratio of the color conversion layer 140 is 1:2. When the thickness of the color conversion layer 140 is 5um, the line width of the color conversion layer 140 is 10um. In this embodiment, the color conversion layer 140 is confined within the opening 131 defined by the isolation component, so as to improve the resolution of the color conversion layer 140 by using the resolution of the isolation component. When the line width of the isolation component is between 0.5um and 1um, the size of the opening 131 defined by two adjacent isolation components is not less than 2um. The larger the size of the opening 131, the higher the pixel opening rate. If the size of the opening 131 is 2um, the pixel size is 2.5um, and the PPI (Pixels Per Inch, the number of pixels within one inch) is 10160. If the size of the opening 131 is 4 um and the line width of the isolation element is 1 um, the pixel size is 5 um and the PPI is 5080.

[0053] In some embodiments, the width of the transparent baffle 121 along the cross-sectional direction of the driving substrate 110 is not less than 0.5um, the thickness of the metal reflective layer 122 along the cross-sectional direction of the driving substrate 110 is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer 130 along the cross-sectional direction of the driving substrate 110 is in the range of 0.1um to 0.25um, that is, the line width of the isolation component plus the transparent protective layer 130 in the cross-sectional direction of the driving substrate 110 is in the range of 0.62um to 0.85um. It should be noted that when the thickness of the metal reflective layer 122 in the cross-sectional direction of the driving substrate 110 is greater than 0.05um, more than 99% of visible light can be reflected, thereby ensuring that the line width of the isolation component is as narrow as possible, while also improving the luminous efficiency and avoiding light leakage from the side 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 the three colors of 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 the three colors of light, thereby reducing the crosstalk of light of different colors, and can also improve 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. The blue photon energy is higher, which can more effectively excite the red and green quantum dots, and 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] Further, 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 light sources in 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 in 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 in 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 in 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 in 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 three primary colors.

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

[0061] A planarization layer 160 is disposed on one side of the driving substrate 110 and covers the plurality of light sources 150;

[0062] A plurality of isolation components are arranged at intervals on a side of the planarization layer 160 away from the driving substrate 110 , and two adjacent isolation components define 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 , and 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 baffle wall, the amount of light absorbed by the baffle wall can also be reduced, and then the reflective isolation wall 120 is isolated from the color conversion layer 140 by the transparent protective layer 130, so as to avoid the 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. In detail, firstly, the reflective isolation wall 120 is used to reflect the light emitted by the light source 150 and the light converted by the color conversion layer 140. Compared with the black baffle, the absorption of light by the baffle can be effectively reduced, thereby improving the light extraction rate. Based on the reflective effect of the reflective isolation wall 120, the side leakage of the display panel 100 can be effectively avoided, further improving the light extraction rate. Secondly, by wrapping a layer of transparent protective layer 130 on the surface of the reflective isolation wall 120, the reflective isolation wall 120 will not be in direct contact with the color conversion layer 140, effectively avoiding the formation of plasma excitation between the reflective isolation wall 120 and the color conversion layer 140, thereby reducing the loss of light energy and improving the luminous efficiency of the color conversion layer 140. In summary, by setting the reflective isolation wall 120 and the transparent protective layer 130, the problem of low luminous efficiency of the display panel 100 caused by the setting of the black baffle can be effectively improved.

[0066] It should be noted that, for the preparation of the color conversion layer 140, in some embodiments, the color conversion layer 140 can be made of QD (Quantum Dot) photoresist material by photolithography. In other embodiments, the color conversion layer 140 can be made of 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 QD composite material, and the pixel structure is obtained by electrophoretic deposition. In this embodiment, it is necessary to process pixel electrodes on the driving substrate 110, and then use electrophoretic deposition to deposit quantum dots on the pixel electrodes to obtain the 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 usually used for inkjet printing, coating and other deposition processes to form quantum dot patterns 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 disposed on the glass substrate 111. The light source 150 is disposed 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 baffles 121 and a metal reflective layer 122. The plurality of transparent baffles 121 are arranged at intervals on one side of the driving substrate 110. The light emission direction of the light source 150 is toward between two adjacent transparent baffles 121. Compared with the black baffles in the related art, the transparent baffles 121 absorb less light, thereby improving the luminous efficiency. In addition, the transparent baffles 121 can have a narrower line width than the black baffles. Here, the line width of the transparent baffles 121 refers to the width of the transparent baffles 121 in the cross-sectional direction of the driving substrate 110. The line width of the baffles will affect the size of the opening 131 of the display panel 100. The narrower the line width, the larger the opening 131, and the wider the line width, the smaller the opening 131. In the related art, the interference between quantum dots of different colors is effectively reduced by using black baffles, but the black baffles are made of black photoresist material, and the photolithography resolution is low and the line width is large, which will result in a smaller opening 131. In particular, when the thickness of the color conversion layer 140 is increased to improve the luminous brightness of the display panel 100, the minimum line width of the black baffles will increase with the increase of the thickness, resulting in the inability to reduce the pixel size of the display panel 100, thereby failing to obtain a high-resolution display panel 100 while maintaining high light efficiency. The transparent baffles 121 used in this embodiment have good light transmittance, low scattering, high resolution and high exposure accuracy, so that the transparent baffles 121 can still maintain a narrow line width when the thickness of the color conversion layer 140 increases.

[0069] For example:

[0070] In the 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 10000PPI. 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 for 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 1000nit, the brightness of the light converted by the color conversion layer is 2100nit, 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 1000nit, the brightness of the light converted by the color conversion layer is 980nit, 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 1000nit, the brightness of the light converted by the color conversion layer is 2500nit, and the luminous efficiency is 250%.

[0071] Furthermore, the metal reflective layer 122 is wrapped around the surface of the transparent baffle 121, and the transparent protective layer 130 is wrapped around the surface of the metal reflective layer 122 away from the transparent baffle 121. By wrapping the metal reflective layer 122 around the surface of the transparent baffle 121, the light emitted by the light source 150 and the light converted by the color conversion layer 140 are reflected by the metal reflective layer 122, so that the light is always emitted from the front of the display panel 100, effectively avoiding light leakage from the side of the display panel 100. Then, by wrapping the surface of the metal reflective layer 122 away from the transparent baffle 121 with the transparent protective layer 130, the metal reflective layer 122 is isolated from the color conversion layer 140, avoiding direct contact between the metal reflective layer 122 and the color conversion layer 140 to generate plasmons, thereby reducing the loss of light energy and improving the luminous efficiency of the color conversion layer 140. In addition, the 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, and then the metal reflective layer 122 is etched and patterned to etch away the metal reflective layer 122 outside the coverage of the transparent protective layer 130. During the whole 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 wall 121 .

[0073] In some embodiments, the height of the isolation component along the thickness direction of the driving substrate 110 is greater than 5um, and the width along the cross-sectional direction of the driving substrate 110 is not less than 0.7um. Compared with the related art, the isolation component of this embodiment has a higher height and a narrower line width, so that the isolation component has a high luminous efficiency and a higher resolution. In detail, in the related art, in order to ensure that the display panel 100 has a high luminous efficiency, it is necessary to control the thickness range of the color conversion layer 140 to be above 5um, because the 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 5um, the line width of the black baffle is at least 5um, resulting in a small area of ​​the opening 131 defined by the black baffle, which affects the resolution of the display panel 100. In this embodiment, by using a transparent baffle 121 and utilizing the high aspect ratio of the transparent baffle 121, the line width of the baffle is limited to a smaller range while ensuring that the color conversion layer 140 has a high thickness. The aspect ratio of the transparent baffle 121 in this embodiment is greater than 5, that is, the ratio of the height of the transparent baffle 121 in the thickness direction of the driving substrate 110 to the width of the transparent baffle 121 in the cross-sectional direction of the driving substrate 110 is greater than 5. For example: in the related art, the aspect ratio of the color conversion layer 140 is 1:2. When the thickness of the color conversion layer 140 is 5um, the line width of the color conversion layer 140 is 10um. In this embodiment, the color conversion layer 140 is confined within the opening 131 defined by the isolation component, so as to improve the resolution of the color conversion layer 140 by using the resolution of the isolation component. When the line width of the isolation component is between 0.5um and 1um, the size of the opening 131 defined by two adjacent isolation components is not less than 2um. The larger the size of the opening 131, the higher the pixel opening rate. If the size of the opening 131 is 2um, the pixel size is 2.5um, and the PPI (Pixels Per Inch, the number of pixels within one inch) is 10160. If the size of the opening 131 is 4 um and the line width of the isolation element is 1 um, the pixel size is 5 um and the PPI is 5080.

[0074] In some embodiments, the width of the transparent baffle 121 along the cross-sectional direction of the driving substrate 110 is not less than 0.5um, the thickness of the metal reflective layer 122 along the cross-sectional direction of the driving substrate 110 is in the range of 0.02um to 0.1um, and the thickness of the transparent protective layer 130 along the cross-sectional direction of the driving substrate 110 is in the range of 0.1um to 0.25um, that is, the line width of the isolation component plus the transparent protective layer 130 in the cross-sectional direction of the driving substrate 110 is in the range of 0.62um to 0.85um. It should be noted that when the thickness of the metal reflective layer 122 in the cross-sectional direction of the driving substrate 110 is greater than 0.05um, more than 99% of visible light can be reflected, thereby ensuring that the line width of the isolation component is as narrow as possible, while also improving the luminous efficiency and avoiding light leakage from the side 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 the three colors of 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 the three colors of light, thereby reducing the crosstalk of light of different colors, and can also improve 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. The blue photon energy is higher, which can more effectively excite the red and green quantum dots, and 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 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. A first quantum dot material 141 is disposed in a first sub-opening 1311 and along the top-viewing direction of the display panel 100. The first quantum dot material 141 blocks the light-emitting side of a first light source, so that the light emitted by the light source 150 can be incident into the first sub-opening 1311 and converted into light of the same color as the first quantum dot material 141 through the first quantum dot material 141. Similarly, a second quantum dot material 142 is disposed in a second sub-opening 1312 and along the top-view direction of the display panel 100, the second quantum dot material 142 blocks the light-emitting side of a second light source, so that the light emitted by the light source 150 can be incident into the second sub-opening 1312 and converted into light of the same color as the second quantum dot material 142 by the second quantum dot material 142. Along the top-view direction of the display panel 100, a third light source 150 is located in the outline of a third sub-opening 1313, so that the light emitted by the third light source can be directly mixed with the light converted by the color conversion layer 140, thereby realizing multi-color display of the display panel 100.

[0077] In some embodiments, the display panel 100 further includes a color filter layer 170, and the color filter layer 170 covers the side of the color conversion layer 140 away from the driving substrate 110. In other embodiments, the color conversion layer 140 has a thickness greater than 5 um in the thickness direction of the driving substrate 110, and the transmittance of the light emitted by the light source 150 through the color conversion layer 140 is less than 1%, and the color filter layer 170 may not be provided on the side of the color conversion layer 140 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, the present application uses specific words to describe the embodiments of the present 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 the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0080] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of the present application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of the present application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

Claims

1. A display panel, characterized in that: include: Driver substrate; A plurality of isolation components are arranged at intervals 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 of the light sources is arranged in one of the openings; A color conversion layer is disposed in at least a portion of the opening and one of the color conversion layers covers one of the light sources; Wherein, 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.

2. The display panel according to claim 1, wherein: The reflective isolation wall includes a transparent baffle wall and a metal reflective layer. A plurality of the transparent baffle walls are spaced apart on one side of the drive substrate. The metal reflective layer covers the surface of the transparent baffle wall. The transparent protective layer covers the surface of the metal reflective layer away from the transparent baffle wall.

3. The display panel according to claim 2, wherein: 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.

4. The display panel according to claim 3, 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.

5. The display panel according to claim 3, wherein: The width of the transparent baffle 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.

6. A display panel, characterized in that: include: Driver substrate; A plurality of light sources are arranged at intervals on one side of the driving substrate; A planarization layer, disposed on one side of the driving substrate and covering the plurality of light sources; A plurality of isolation components are arranged at intervals on a side of the planarization layer away from the driving substrate, and two adjacent isolation components define an opening; A color conversion layer is disposed in at least a portion of the opening, and along the top-viewing direction of the display panel, one color conversion layer blocks the light-emitting side of one light source; 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.

7. The display panel according to claim 6, wherein: The reflective isolation wall includes a transparent baffle wall and a metal reflective layer. A plurality of the transparent baffle walls are spaced apart on the side of the planarization layer away from the drive substrate. The metal reflective layer covers the surface of the transparent baffle wall. The transparent protective layer covers the surface of the metal reflective layer away from the transparent baffle wall.

8. The display panel according to claim 7, wherein: 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.

9. The display panel according to claim 8, 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.

10. The display panel according to claim 8, wherein: The width of the transparent baffle 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.

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