CN115347134A - Display substrate, manufacturing method thereof and display device - Google Patents
Display substrate, manufacturing method thereof and display device Download PDFInfo
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- CN115347134A CN115347134A CN202211032905.8A CN202211032905A CN115347134A CN 115347134 A CN115347134 A CN 115347134A CN 202211032905 A CN202211032905 A CN 202211032905A CN 115347134 A CN115347134 A CN 115347134A
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Abstract
The invention provides a display substrate, a manufacturing method thereof and a display device, and belongs to the technical field of display. Wherein, the display substrate includes: a drive substrate; a plurality of light emitting units located on the driving substrate, the light emitting units being independent of each other; the first lenses are positioned on the light emitting side of the light emitting units and correspond to the light emitting units one to one; a plurality of color filter lenses positioned at the light exit side of the first lens; wherein the refractive index of the color filter lens is greater than that of the first lens. According to the technical scheme, the light efficiency gain can be improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a manufacturing method thereof and a display device.
Background
An Organic Light-Emitting Diode (OLED) display device has been classified as a next-generation display technology with great development prospect because of its advantages of thinness, lightness, wide viewing angle, active Light emission, continuously adjustable Light emission color, low cost, fast response speed, low energy consumption, low driving voltage, wide working temperature range, simple production process, high Light-Emitting efficiency, flexible display, etc.
Disclosure of Invention
The embodiment of the invention provides a display substrate, a manufacturing method thereof and a display device, which can improve the light efficiency gain of the display substrate.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, a display substrate is provided, including:
a drive substrate;
a plurality of light emitting units located on the driving substrate, the light emitting units being independent of each other;
the first lenses are positioned on the light emitting side of the light emitting units and correspond to the light emitting units one to one;
a plurality of color filter lenses positioned at the light exit side of the first lens;
wherein the refractive index of the color filter lens is greater than that of the first lens.
In some embodiments, further comprising:
and the flat layer is positioned on the light outlet side of the color filter lens, and the refractive index of the flat layer is smaller than that of the first lens.
In some embodiments, a surface of the color filter lens facing to the first lens is attached to a surface of the first lens facing to the color filter lens.
In some embodiments, the first lens is hemispherical.
In some embodiments, the orthographic projection of the color filter lens on the driving substrate covers the orthographic projection of the light emitting unit on the driving substrate.
In some embodiments, the color filter lens includes a red filter lens, a blue filter lens, and a green filter lens; or
The color filter lens includes a magenta filter lens, a yellow filter lens, and a cyan filter lens.
In some embodiments, the color filter lenses correspond to the first lenses one to one.
Embodiments of the present invention also provide a display device, including the display substrate as described above.
The embodiment of the invention also provides a manufacturing method of the display substrate, which comprises the following steps:
providing a driving substrate;
forming a plurality of light emitting units independent of each other on the driving substrate;
forming a plurality of first lenses on the light emitting side of the light emitting unit, wherein the first lenses correspond to the light emitting unit one to one;
forming a plurality of color filter lenses on the light emergent side of the first lens, wherein the color filter lenses correspond to the first lens one by one;
wherein the refractive index of the color filter lens is greater than that of the first lens.
In some embodiments, further comprising:
and forming a flat layer on the light emergent side of the color filter lens, wherein the refractive index of the flat layer is smaller than that of the first lens.
In some embodiments, the forming a plurality of color filter lenses on the light exit side of the first lens includes:
and coating a liquid color filter material on the driving substrate on which the first lens is formed, wherein the liquid color filter material flows on the surface of the first lens to form an arc-shaped structure covering the first lens.
The embodiment of the invention has the following beneficial effects:
in the above scheme, the first lens is arranged on the light-emitting side of the light-emitting unit, the plurality of color filter lenses are arranged on the light-emitting side of the first lens, the brightness gain is realized by utilizing the principle of convex lens condensation, the refractive index of the color filter lenses is larger than that of the first lens, the refractive index difference between the lens structure formed by the first lens and the color filter lenses and the surrounding filling materials can be further improved, and the light effect gain effect is further improved.
Drawings
FIG. 1 is a schematic diagram of a related art display substrate;
FIG. 2 is a schematic view of a display substrate according to an embodiment of the invention.
Reference numerals
01. Driving substrate
02. Anode
03. Luminescent layer
04. Encapsulation layer
05. Planarization layer
06. First lens
07. Planarization layer
08. Packaging cover plate
091. Red filter unit
092. Green light filtering unit
093. Blue filter unit
10. Color filter lens
1001. Red filter lens
1002. Green filter lens
1003. Blue filter lens
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a display substrate, a manufacturing method thereof and a display device, which can improve the light effect gain.
In the related art, if the OLED display substrate adopts a white light emitting unit + color film mode to realize colorization of display, a color filter layer needs to be prepared after the OLED white light emitting unit is prepared. In order to achieve a brightness gain, as shown in fig. 1, a hemispherical first lens 06 is prepared on a light emitting side of a color filter layer (which may include a red filter cell 091, a green filter cell 092, and a blue filter cell 093), and a brightness gain is achieved by using a principle of light condensing by a convex lens, and since a surface of a display substrate is uneven after the color filter layer is formed, a planarization layer 05 needs to be formed before the first lens is formed after the color filter layer is formed in order to facilitate the preparation of the first lens 06.
However, in the related art, white light passes through the color filter layer and then is focused by the first lens 06, so that the light effect gain is limited. The embodiment of the invention provides a display substrate, which can further improve the light effect gain.
As shown in fig. 2, the display substrate of the present embodiment includes: the driving substrate 01 can comprise a substrate and a driving circuit positioned on the substrate, the driving circuit comprises components such as a driving thin film transistor, a switching thin film transistor, a signal line and the like, and the substrate can be a hard substrate or a flexible substrate; a plurality of mutually independent light-emitting units on the driving substrate 01, wherein each light-emitting unit comprises an anode 02 and a light-emitting layer 03, and further comprises a cathode (not shown) on one side of the light-emitting layer 03 far away from the driving substrate, and the light-emitting layer 03 can emit white light under the action of an electric field between the anode and the cathode; an encapsulation layer 04 positioned on a side of the light emitting layer 03 away from the driving substrate 01, wherein the encapsulation layer 04 is used for preventing water and oxygen from invading into the light emitting layer, and the encapsulation layer 04 may include a plurality of organic encapsulation films and inorganic encapsulation films which are alternately stacked; the first lenses 06 are positioned on one side of the packaging layer 04 away from the substrate, the first lenses 06 correspond to the light-emitting units one by one, each first lens 06 is positioned on the light-emitting side of the corresponding light-emitting unit, the first lenses 06 are transparent lenses and can converge light rays emitted by the corresponding light-emitting units, and the brightness gain is realized by utilizing the principle of convex lens light-gathering; be located a plurality of colored filter lens 10 of first lens 06's light-emitting side, colored filter lens 10 with first lens 06 one-to-one, each colored filter lens 10 is located the light-emitting side of the first lens 06 of correspondence, and colored filter lens 10's refracting index is greater than first lens 06's refracting index.
In this embodiment, the color filter lens can not only filter the white light emitted by the light emitting unit to realize colorization of the display, but also further improve the refractive index difference between the lens structure formed by the first lens and the color filter lens and the surrounding filling material because the refractive index of the color filter lens 10 is greater than that of the first lens 06, thereby further improving the light efficiency gain effect.
Further, as shown in fig. 2, in order to facilitate the packaging with the package cover 08, the display substrate further includes a planarization layer 07 located on the light exit side of the color filter lenses 10, and the planarization layer 07 fills the gaps between the color filter lenses 10 and can form a planar surface; in some embodiments, the planarization layer 07 may be an ultraviolet glue, which may be used for planarization on the one hand and for adhering the package cover 08 to the driving substrate on which the color filter lens is formed on the other hand. The refractive index of the flat layer 07 is smaller than that of the first lens 06 and is further smaller than that of the color filter lens 10, and within a certain range, the larger the difference between the refractive index of the flat layer 07 and the refractive index of the lens structure composed of the first lens and the color filter lens is, the larger the light effect gain is. In a specific application, the difference between the refractive indexes of the flattening layer 07 and the lens structure composed of the first lens and the color filter lens can be adjusted according to the required optical effect gain.
In some embodiments, the color filter lens 10 may include a red filter lens 1001, a blue filter lens 1003, and a green filter lens 1002; alternatively, the color filter lens may include a magenta filter lens, a yellow filter lens, and a cyan filter lens. The color filter lens can filter the white light emitted by the light emitting unit to form light with different colors.
The filter lenses without colors can adopt filter materials with different refractive indexes, so that different light effect gain effects of different color pixels can be realized; for example, if the red light efficiency of the display substrate is required to be good, a red filter material with a high refractive index can be used to form a red filter lens, so that the red pixel has a better light efficiency gain; the green light effect of the display substrate is good, and a green filter material with a high refractive index can be adopted to form a green filter lens, so that green pixels have better light effect gain; the blue light efficiency of the display substrate is good, and a blue filter material with a high refractive index can be adopted to form the blue filter lens, so that the blue pixel has a better light efficiency gain.
Similarly, when the color filter lens includes a magenta filter lens, a yellow filter lens and a cyan filter lens, the light efficiency of the magenta required for the display substrate is relatively good, and then the magenta filter lens can be formed by using a magenta filter material with a higher refractive index, so that the magenta pixel has a better light efficiency gain; the yellow light effect of the display substrate is required to be good, and a yellow filter lens can be formed by adopting a yellow filter material with a high refractive index, so that yellow pixels have better light effect gain; the cyan filter lens can be formed by using a cyan filter material with a high refractive index, so that the cyan pixel has a better light effect gain.
In this embodiment, the first lens 06 may be a hemisphere, a hemisphere or a portion of a sphere. The first lens can be made of a photosensitive material, a photosensitive material layer is formed first, the photosensitive material layer is exposed and developed to form a plurality of patterns of the photosensitive material layer, the patterns of the photosensitive material layer are cubic, and the patterns of the cubic photosensitive material layer are baked to form the first lens 06.
In this embodiment, the shape of the color filter lens 10 may match the shape of the first lens 06, and as shown in fig. 2, the surface of the color filter lens 10 facing the first lens 06 is attached to the surface of the corresponding first lens 06 facing the color filter lens 10. In this embodiment, the first lens 06 is formed on the encapsulation layer 04, and the color filter lens 10 is located on a side of the first lens 06 away from the driving substrate, compared with the structure of fig. 1, it is not necessary to form the planarization layer 05 before forming the first lens 06, so that the structure of the display substrate can be simplified; in addition, the color filter lens 10 may be directly formed on the surface of the first lens 06 on the side away from the driving substrate 01, and there is no need to form another dielectric layer between the color filter lens 10 and the first lens 06.
When the color filter lens 10 is formed, a liquid color filter material is coated on the first lens 06, the color filter lens with an arc-shaped structure is formed by utilizing the fluidity of the color filter material, and then the excessive color filter material is removed by an exposure and development method, so that the patterning of the color filter material is realized. The color filter lens 10 can further converge light, and as the refractive index of the color filter material is higher than that of the first lens 06, the difference between the refractive index of the lens structure formed by the first lens 06 and the color filter lens and the refractive index of the flat layer 07 is larger, so that the light effect gain can be further enhanced.
In some embodiments, the orthographic projection of the color filter lens 10 on the driving substrate covers the orthographic projection of the light-emitting unit on the driving substrate, so that the color filter lens can converge as much light as possible, and the light extraction efficiency of the light is improved; preferably, the orthographic projection of the first lens 06 on the driving substrate covers the orthographic projection of the light-emitting unit on the driving substrate, so that the first lens 06 can converge as much light as possible, and the light extraction efficiency of the light is improved.
The orthographic projection of the color filter lens 10 on the driving substrate can cover the orthographic projection of the first lens 06 on the driving substrate, so that the light rays emitted by the first lens 06 can all enter the color filter lens 10.
Embodiments of the present invention also provide a display device, including the display substrate as described above.
The display device includes but is not limited to: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, processor, and power supply. It will be appreciated by those skilled in the art that the above described configuration of the display device does not constitute a limitation of the display device, and that the display device may comprise more or less of the components described above, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.
The display device may be: the display device comprises a television, a display, a digital photo frame, a mobile phone, a tablet personal computer and any other product or component with a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board and a back plate.
The embodiment of the invention also provides a manufacturing method of the display substrate, which comprises the following steps:
providing a driving substrate;
forming a plurality of light emitting units independent of each other on the driving substrate;
forming a plurality of first lenses on the light emitting side of the light emitting unit, wherein the first lenses correspond to the light emitting unit one to one;
forming a plurality of color filter lenses on the light emergent side of the first lens, wherein the color filter lenses correspond to the first lens one to one;
wherein the refractive index of the color filter lens is greater than that of the first lens.
In this embodiment, the color filter lens not only can filter the white light emitted by the light emitting unit to realize colorization of display, but also can further improve the refractive index difference between the lens structure formed by the first lens and the color filter lens and the surrounding filling material because the refractive index of the color filter lens 10 is greater than that of the first lens 06, thereby further improving the light efficiency gain effect.
Further, as shown in fig. 2, in order to facilitate the packaging with the package cover 08, the method further includes:
a flat layer 07 is formed on the light-emitting side of the color filter lens 10, and the flat layer 07 fills the gap between the color filter lenses 10 and can form a flat surface; in some embodiments, the planarization layer 07 may be made of an ultraviolet adhesive, which may be used for planarization, and may also be used for adhering the package cover 08 to the driving substrate formed with the color filter lens. The refractive index of the flat layer 07 is smaller than that of the first lens 06 and is further smaller than that of the color filter lens 10, and within a certain range, the larger the difference between the refractive index of the flat layer 07 and the refractive index of the lens structure composed of the first lens and the color filter lens is, the larger the light effect gain is. In a specific application, the difference between the refractive indexes of the planarization layer 07 and the lens structure composed of the first lens and the color filter lens can be adjusted according to the required optical effect gain.
In some embodiments, the color filter lens 10 may include a red filter lens 1001, a blue filter lens 1003, and a green filter lens 1002; alternatively, the color filter lens may include a magenta filter lens, a yellow filter lens, and a cyan filter lens. The color filter lens can filter the white light emitted by the light emitting unit to form light with different colors.
The filter lens without colors can adopt filter materials with different refractive indexes, so that different light effect gain effects of different color pixels can be realized; for example, if the red light efficiency of the display substrate is required to be good, a red filter material with a high refractive index can be used to form a red filter lens, so that the red pixel has a better light efficiency gain; the green light effect of the display substrate is good, and a green filter material with a high refractive index can be adopted to form a green filter lens, so that green pixels have better light effect gain; the blue light efficiency of the display substrate is good, and a blue filter material with a high refractive index can be adopted to form the blue filter lens, so that the blue pixel has a better light efficiency gain.
Similarly, when the color filter lens includes a magenta filter lens, a yellow filter lens and a cyan filter lens, the light efficiency of the magenta required for the display substrate is relatively good, and then the magenta filter lens can be formed by using a magenta filter material with a higher refractive index, so that the magenta pixel has a better light efficiency gain; the yellow light effect of the display substrate is required to be good, and a yellow filter lens can be formed by adopting a yellow filter material with a high refractive index, so that yellow pixels have better light effect gain; the cyan filter lens can be formed by using a cyan filter material with a high refractive index, so that the cyan pixel has a better light effect gain.
In this embodiment, the first lens 06 may be a hemisphere, a hemisphere or a portion of a sphere. The first lens can be made of a photosensitive material, a photosensitive material layer is formed first, the photosensitive material layer is exposed and developed to form a plurality of patterns of the photosensitive material layer, the patterns of the photosensitive material layer are cubic, and the patterns of the cubic photosensitive material layer are baked to form the first lens 06.
In this embodiment, the shape of the color filter lens 10 may match the shape of the first lens 06, and as shown in fig. 2, the surface of the color filter lens 10 facing the first lens 06 is attached to the surface of the corresponding first lens 06 facing the color filter lens 10. In this embodiment, the first lens 06 is formed on the encapsulation layer 04, and the color filter lens 10 is located on a side of the first lens 06 away from the driving substrate, compared with the structure of fig. 1, it is not necessary to form the planarization layer 05 before forming the first lens 06, so that the structure of the display substrate can be simplified; in addition, the color filter lens 10 may be directly formed on the surface of the first lens 06 on the side away from the driving substrate 01, and there is no need to form another dielectric layer between the color filter lens 10 and the first lens 06.
In some embodiments, the forming a plurality of color filter lenses on the light exit side of the first lens includes:
and coating a liquid color filter material on the driving substrate on which the first lens is formed, wherein the liquid color filter material flows on the surface of the first lens to form an arc-shaped structure covering the first lens, and removing the redundant color filter material by an exposure and development method to realize the patterning of the color filter material. The color filter lens 10 can further converge light, and as the refractive index of the color filter material is higher than that of the first lens 06, the difference between the refractive index of the lens structure formed by the first lens 06 and the color filter lens and the refractive index of the flat layer 07 is larger, so that the light effect gain can be further enhanced.
In some embodiments, the orthographic projection of the color filter lens 10 on the driving substrate covers the orthographic projection of the light-emitting unit on the driving substrate, so that the color filter lens can converge as much light as possible, and the light extraction efficiency of the light is improved; preferably, the orthographic projection of the first lens 06 on the driving substrate covers the orthographic projection of the light-emitting unit on the driving substrate, so that the first lens 06 can converge as much light as possible, and the light extraction efficiency of the light is improved.
The orthographic projection of the color filter lens 10 on the driving substrate can cover the orthographic projection of the first lens 06 on the driving substrate, so that the light rays emitted by the first lens 06 can all enter the color filter lens 10.
It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments, since they are substantially similar to the product embodiments, the description is simple, and the relevant points can be referred to the partial description of the product embodiments.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (11)
1. A display substrate, comprising:
a drive substrate;
a plurality of light emitting units located on the driving substrate, the light emitting units being independent of each other;
the first lenses are positioned on the light emitting side of the light emitting units and correspond to the light emitting units one to one;
a plurality of color filter lenses positioned on a light exit side of the first lens;
wherein the refractive index of the color filter lens is greater than that of the first lens.
2. The display substrate of claim 1, further comprising:
and the flat layer is positioned on the light outlet side of the color filter lens, and the refractive index of the flat layer is smaller than that of the first lens.
3. The display substrate of claim 1, wherein a surface of the color filter lens facing the first lens is attached to a surface of the first lens facing the color filter lens.
4. The display substrate of claim 1, wherein the first lens is hemispherical.
5. The display substrate of claim 1, wherein the orthographic projection of the color filter lens on the driving substrate covers the orthographic projection of the light emitting unit on the driving substrate.
6. The display substrate of claim 1, wherein the color filter lenses comprise a red filter lens, a blue filter lens, and a green filter lens; or
The color filter lens includes a magenta filter lens, a yellow filter lens, and a cyan filter lens.
7. The display substrate of claim 1, wherein the color filter lenses are in one-to-one correspondence with the first lenses.
8. A display device comprising the display substrate according to any one of claims 1 to 7.
9. A method for manufacturing a display substrate is characterized by comprising the following steps:
providing a driving substrate;
forming a plurality of light emitting cells independent of each other on the driving substrate;
forming a plurality of first lenses on the light emitting side of the light emitting unit, wherein the first lenses correspond to the light emitting unit one to one;
forming a plurality of color filter lenses on the light emergent side of the first lens, wherein the color filter lenses correspond to the first lens one to one;
wherein the refractive index of the color filter lens is greater than that of the first lens.
10. The method for manufacturing a display substrate according to claim 9, further comprising:
and forming a flat layer on the light emergent side of the color filter lens, wherein the refractive index of the flat layer is smaller than that of the first lens.
11. The method of claim 9, wherein the forming a plurality of color filter lenses on the light exit side of the first lens comprises:
and coating a liquid color filter material on the driving substrate on which the first lens is formed, wherein the liquid color filter material flows on the surface of the first lens to form an arc-shaped structure covering the first lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211032905.8A CN115347134A (en) | 2022-08-26 | 2022-08-26 | Display substrate, manufacturing method thereof and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211032905.8A CN115347134A (en) | 2022-08-26 | 2022-08-26 | Display substrate, manufacturing method thereof and display device |
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| Publication Number | Publication Date |
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| CN115347134A true CN115347134A (en) | 2022-11-15 |
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| CN202211032905.8A Pending CN115347134A (en) | 2022-08-26 | 2022-08-26 | Display substrate, manufacturing method thereof and display device |
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2022
- 2022-08-26 CN CN202211032905.8A patent/CN115347134A/en active Pending
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