CN214122626U - Light-emitting element and display - Google Patents
Light-emitting element and display Download PDFInfo
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- CN214122626U CN214122626U CN202023343010.5U CN202023343010U CN214122626U CN 214122626 U CN214122626 U CN 214122626U CN 202023343010 U CN202023343010 U CN 202023343010U CN 214122626 U CN214122626 U CN 214122626U
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- 239000002096 quantum dot Substances 0.000 claims abstract description 86
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 238000005424 photoluminescence Methods 0.000 claims abstract description 16
- 230000002708 enhancing effect Effects 0.000 claims abstract description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 23
- 239000011324 bead Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 21
- 238000010586 diagram Methods 0.000 description 7
- 230000003667 anti-reflective effect Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004054 semiconductor nanocrystal Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of show, especially, relate to a light emitting component and display. The light-emitting element comprises a photoluminescence component, a backlight component and an anti-reflection component. The photoluminescence component comprises a quantum dot substrate, a quantum dot layer arranged on the quantum dot substrate, green light quantum dots arranged in the quantum dot layer and red light quantum dots arranged in the quantum dot layer. The backlight assembly is positioned at one side of the photoluminescence assembly and is configured to generate blue light. The anti-reflection assembly is positioned at the other side of the photoluminescence assembly and comprises an anti-reflection film, a first dielectric layer and a second dielectric layer, the anti-reflection film comprises a green light anti-reflection layer for enhancing green light, a red light anti-reflection layer for enhancing red light and a blue light anti-reflection layer for enhancing blue light, and the green light anti-reflection layer, the red light anti-reflection layer and the blue light anti-reflection layer are respectively tiled relative to the quantum dot layer. The utility model discloses light-emitting efficiency and chroma can be improved to reach energy-conserving effect.
Description
Technical Field
The utility model belongs to the technical field of show, especially, relate to a light emitting component and display.
Background
At present, a quantum dot display belongs to an innovative semiconductor nanocrystal technology, can accurately convey light, efficiently improves the color gamut value of a display screen, enables colors to be purer and brighter, and enables color expression to have more tension. The core of the method is that when crystal grains with the diameter of 2-10 nanometers are subjected to photoelectric stimulation, monochromatic light with different colors can be excited according to the size of the crystal grain diameter.
The light extraction efficiency is an index for evaluating the energy saving of the display. The light extraction efficiency of a display is usually expressed by the percentage of the light extraction intensity of the display panel divided by the light extraction intensity of the backlight module. Generally, a liquid crystal display includes a display panel and a backlight module, and the display panel generally includes a substrate, a switching element array, a liquid crystal, a color filter, and a polarizer. After the light emitted by the backlight module passes through the substrate, the switch element array, the liquid crystal, the color filter, the polarizer and other structures of the display panel, the actual Intensity (Intensity) of the light output by the display panel is attenuated to 3-5% of the Intensity of the light emitted by the backlight module, that is, the light emitting efficiency is only 3-5%. In order to achieve the required brightness for display, the display must use a backlight module with higher intensity, which consumes more energy.
In addition, in the conventional liquid crystal display, comparing the spectrum of the light emitted from the display panel with the spectrum of the light emitted from the backlight module, it can be found that for red, green and blue primary lights, the full width at half maximum of the light emitted from the display panel in the red and green light bands is wide and the peak value is low, which results in a poor chromaticity specification of the liquid crystal display relative to the National Television System standards (NTSC). Existing liquid crystal displays typically achieve about 72% of NTSC specified standard values and thus are inferior in color appearance to conventional cold cathode ray tube televisions.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a light emitting device, which aims to solve the problem of how to enhance the chroma of light.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a light-emitting element including:
a photoluminescence component comprising a quantum dot substrate, a quantum dot layer arranged on the quantum dot substrate, green light quantum dots arranged in the quantum dot layer and red light quantum dots arranged in the quantum dot layer;
a backlight assembly positioned at one side of the photoluminescence assembly and configured to generate blue light, the backlight assembly projecting the blue light toward the quantum dot layer and exciting the green light quantum dots to generate green light and exciting the red light quantum dots to generate red light; and
the anti-reflection assembly is positioned on the other side of the photoluminescence assembly and comprises an anti-reflection film, a first dielectric layer and a second dielectric layer, the anti-reflection film is positioned between the first dielectric layer and the second dielectric layer, the quantum dot layer is positioned between the second dielectric layer and the quantum dot substrate, the anti-reflection film comprises a green light anti-reflection layer for enhancing green light, a red light anti-reflection layer for enhancing red light and a blue light anti-reflection layer for enhancing blue light, and the green light anti-reflection layer, the red light anti-reflection layer and the blue light anti-reflection layer are respectively tiled relative to the quantum dot layer.
In one embodiment, the light emitting element further comprises a first polarizer, the first polarizer being located between the second dielectric layer and the quantum dot layer.
In one embodiment, the light emitting device further comprises a second polarizer, and the anti-reflection assembly is located between the second polarizer and the quantum dot layer.
In one embodiment, a gap is formed between the antireflection film and the quantum dot layer, and the second dielectric layer is an air layer located between the antireflection film and the quantum dot layer.
In one embodiment, the second dielectric layer is integrally formed with the quantum dot layer.
In one embodiment, at least one of the green light reflection reducing layer, the red light reflection reducing layer and the blue light reflection reducing layer is a multi-film structure.
In one embodiment, the backlight assembly includes a back plate disposed opposite to the photoluminescence assembly, a light guide plate disposed between the back plate and the photoluminescence assembly, a lamp bead disposed on the back plate and between the back plate and the light guide plate, and a collimating film disposed between the light guide plate and the photoluminescence assembly.
Another object of the present application is to provide a display, which includes the above light emitting device, the display further includes a lower substrate disposed opposite to the first dielectric layer, an upper substrate disposed opposite to the lower substrate, and a liquid crystal module disposed between the lower substrate and the upper substrate, the display further includes a polarizer disposed on the upper substrate, and the upper substrate is disposed between the liquid crystal module and the polarizer.
In one embodiment, the first dielectric layer is integrally formed with the lower substrate.
In one embodiment, the liquid crystal assembly comprises a pixel array layer, a liquid crystal layer, a common electrode layer and a color filter layer, wherein the pixel array layer, the liquid crystal layer, the common electrode layer and the color filter layer are sequentially stacked along a direction in which the lower substrate points to the upper substrate.
The beneficial effect of this application lies in: the blue light excites the red quantum dots and the green quantum dots to respectively generate red light and green light, and after the blue light, the red light and the green light are incident on the anti-reflection film, the blue light anti-reflection layer, the red light anti-reflection layer and the green light anti-reflection layer respectively generate enhancement effects on the blue light, the red light and the green light, so that the light emitting efficiency and the chroma are improved, and the energy-saving effect is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a light-emitting element provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a light-emitting element in another embodiment of the present application;
FIG. 3 is a schematic diagram of the construction of an antireflective assembly of FIG. 1;
FIG. 4 is a schematic diagram of the brightness enhancement of green, red, and blue light in yet another embodiment of the present application;
FIG. 5 is a schematic diagram of red light enhancement in yet another embodiment of the present application;
FIG. 6 is a schematic diagram of green light enhancement in yet another embodiment of the present application;
FIG. 7 is a schematic diagram of blue light enhancement in yet another embodiment of the present application.
Wherein, in the figures, the respective reference numerals:
100. a light emitting element; 10. a photoluminescent component; 11. a quantum dot substrate; 12. a quantum dot layer; 13. green light quantum dots; 14. red light quantum dots; 20. an anti-reflection assembly; 21. a first dielectric layer; 22. a second dielectric layer; 23. an anti-reflection film; 231. a blue light anti-reflection layer; 232. a green light anti-reflection layer; 233. a red light anti-reflection layer; 30. a backlight assembly; 31. a collimating film; 32. a light guide plate; 33. a lamp bead; 34. a back plate; 40. a liquid crystal module; 41. a lower substrate; 42. an upper substrate; 43. a liquid crystal layer; 44. a pixel array layer; 45. a common electrode layer; 46. a color filter layer; 51. a first polarizer; 52. a second polarizer; 53. a polarizing plate; 461. a blue color resist layer; 462. a green color resist layer; 463. a red color resist layer; 464. a black matrix;
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and fig. 3, a light emitting device 100 and a display having the same are provided in embodiments of the present disclosure. Light emitting device 100 includes backlight assembly 30, photoluminescent assembly 10, and antireflective assembly 20. Photoluminescent assembly 10 is positioned between backlight assembly 30 and antireflective assembly 20. The photoluminescent assembly 10 includes a quantum dot substrate 11, a quantum dot layer 12 disposed on the quantum dot substrate 11, green quantum dots 13 disposed within the quantum dot layer 12, and red quantum dots 14 disposed within the quantum dot layer 12. Optionally, a plurality of green light quantum dots 13 and a plurality of red light quantum dots 14 are provided, and each green light quantum dot 13 and each red light quantum dot 14 are respectively provided at intervals. The backlight assembly 30 is disposed to generate blue light and is located at one side of the quantum dot substrate 11. The backlight assembly 30 projects blue light toward the quantum dot layer 12 and excites the green light quantum dots 13 to produce green light and excites the red light quantum dots 14 to produce red light. By adjusting the quantity and the arrangement gap of the green light quantum dots 13 and the red light quantum dots 14, after the blue light is excited, the green light quantum dots 13 and the red light quantum dots 14 respectively generate green light and red light with preset brightness; and the backlight assembly 30 is controlled to generate blue light of a predetermined brightness. The anti-reflection assembly 20 is located on the other side of the quantum dot and includes an anti-reflection film 23, a first dielectric layer 21 and a second dielectric layer 22. The antireflection film 23 is located between the first dielectric layer 21 and the second dielectric layer 22, the quantum dot layer 12 is located between the second dielectric layer 22 and the quantum dot substrate 11, the antireflection film 23 includes a green light antireflection layer 232 configured to enhance green light, a red light antireflection layer 233 configured to enhance red light, and a blue light antireflection layer 231 configured to enhance blue light, and the green light antireflection layer 232, the red light antireflection layer 233, and the blue light antireflection layer 231 are respectively tiled with respect to the quantum dot layer 12. Optionally, the thickness of the green light anti-reflection layer 232, the thickness of the red light anti-reflection layer 233, and the thickness of the blue light anti-reflection layer 231 are respectively related to the wavelengths of the green light (G), the red light (R), and the blue light (B), so that the thickness of the green light anti-reflection layer 232, the thickness of the red light anti-reflection layer 233, and the thickness of the blue light anti-reflection layer 231 are not equal.
Optionally, the refractive index of the first medium layer 21 is n1The refractive index of the second dielectric layer 22 is n2Refractive index of the antireflection film 23 is n0And n is0＝(n1*n2)1/2。
Taking green light as an example, after blue light, red light, and green light are incident on the green light anti-reflection layer 232, the following formula is satisfied:
h1＝N*λ1/4；
wherein h is1The thickness of the green light anti-reflection layer 232, N is odd number, lambda1Corresponding to the wavelength of green light incident on green anti-reflective layer 232. The light transmission intensity of the green light after passing through the green light reflection reducing layer 232 is increased, and the reflected light of the green light is interfered and cancelled. Light with other wavelengths is reflected to the lower side of the antireflection film 23 to different degrees, is re-screened to other positions of the antireflection film 23 after being reflected for multiple times by the first dielectric layer 21 and the second dielectric layer 22, and is utilized by the red light antireflection layer 233 or the blue light antireflection layer 231.
Alternatively, after the red light and the blue light are incident on the red light anti-reflection layer 233 and the blue light anti-reflection layer 231, respectively, according to the same principle, if h2＝N*λ2/4；h3＝N*λ3(ii)/4; wherein h is2Thickness h of the red light anti-reflection layer 2333Is the thickness, λ, of the blue light anti-reflection layer 2312Is the corresponding wavelength of red light incident on the red light anti-reflection layer 233, λ3The light transmission intensity of the red light and the blue light is also respectively enhanced for the wavelength of the blue light incident on the blue light anti-reflection layer 231, which is not described herein again.
Referring to fig. 4, the blue light excites the red quantum dots and the green quantum dots to generate red light and green light, respectively, and after the blue light, the red light, and the green light are incident on the anti-reflection film 23, the blue light anti-reflection layer 231, the red light anti-reflection layer 233, and the green light anti-reflection layer 232 respectively enhance the blue light, the red light, and the green light, thereby improving the light-emitting efficiency and the chromaticity and achieving the energy-saving effect. In fig. 4, the intensities of green light (G), red light (R), and blue light (B) are all enhanced.
Referring to fig. 5, alternatively, the wavelength of red light is 700nm, and when the thickness of the red light reflection reducing layer 233 is an odd multiple of 175nm, the intensity of transmitted red light is the highest, and the intensity of red light is enhanced in fig. 5.
Referring to fig. 6, optionally, the green light has a wavelength of 550nm, and when the thickness of the green light reflection reducing layer 232 is an odd multiple of 137.5nm, the intensity of the green light transmitted therethrough is the highest, and the intensity of the green light in fig. 6 is enhanced.
Referring to fig. 7, alternatively, the wavelength of blue light is 480nm, and when the thickness of the blue light reflection reducing layer 231 is an odd multiple of 120nm, the intensity of the blue light transmitted therethrough is the highest, and the intensity of the blue light in fig. 7 is enhanced.
Alternatively, the red light quantum dots 14 and the green light quantum dots 13 may be semiconductor nanocrystal materials or other photoluminescent materials having narrow light emission peaks.
In one embodiment, the light emitting device 100 further includes a first polarizer 51, and the first polarizer 51 is located between the second dielectric layer 22 and the quantum dot layer 12. The first polarizer 51 is disposed to polarize green, red and/or blue light.
In one embodiment, light emitting device 100 further includes a second polarizer 52, and antireflective member 20 is positioned between second polarizer 52 and quantum dot layer 12. The second polarizer 52 is disposed to polarize green, red and/or blue light.
In one embodiment, the antireflection film 23 is disposed in a gap with the quantum dot layer 12, and the second dielectric layer 22 is an air layer disposed between the antireflection film 23 and the quantum dot layer 12.
In one embodiment, second dielectric layer 22 is integrally formed with quantum dot layer 12. Alternatively, the second dielectric layer 22 is a layer of transparent dielectric on the surface of the quantum dot layer 12 itself.
In one embodiment, at least one of green light anti-reflection layer 232, red light anti-reflection layer 233, and blue light anti-reflection layer 231 is a multi-film structure.
Optionally, the green light antireflection layer 232 includes a first green light antireflection sub-layer, a second green light antireflection sub-layer …, and an nth green light antireflection sub-layer, which are sequentially stacked, where n is a natural number.
Optionally, the red light antireflection layer 233 includes a first red light antireflection sub-layer, a second red light antireflection sub-layer …, and an nth red light antireflection sub-layer, which are sequentially stacked, where n is a natural number.
Optionally, the blue light anti-reflection layer 231 includes a first blue light anti-reflection sub-layer, a second blue light anti-reflection sub-layer … and an nth blue light anti-reflection sub-layer, which are sequentially stacked, where n is a natural number.
Optionally, n is 2, the green anti-reflection layer 232 is disposed in two layers, and the refractive index of the first green anti-reflection sub-layer is n3The refractive index of the second green light anti-reflection sublayer is n4. Wherein the content of the first and second substances,
then plating a layer with optical thickness of lambda1The thin film/6 can reduce the green light reflection as much as possible, and can achieve a more desirable effect of brightening the green light. Optionally, the principle of the red light antireflection layer 233 and the blue light antireflection layer 231 is similar, and the description thereof is omitted here.
Referring to fig. 1 to 3, in an embodiment, the backlight assembly 30 includes a back plate 34 disposed opposite to the photoluminescent assembly 10, a light guide plate 32 disposed between the back plate 34 and the photoluminescent assembly 10, a bead 33 disposed on the back plate 34 and between the back plate 34 and the light guide plate 32, and a collimating film 31 disposed between the light guide plate 32 and the photoluminescent assembly 10. Optionally, the lamp bead 33 is an LED lamp bead.
The utility model also provides a display, this display includes light emitting component 100, and above-mentioned embodiment is referred to this light emitting component 100's specific structure, because this display has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought equally, and the repeated description is no longer given here.
In one embodiment, the display further includes a lower substrate 41 disposed opposite to the first dielectric layer 21, an upper substrate 42 disposed opposite to the lower substrate 41, and a liquid crystal device 40 disposed between the lower substrate 41 and the upper substrate 42, and the display further includes a polarizer 53 disposed on the upper substrate 42, and the upper substrate 42 is disposed between the liquid crystal device 40 and the polarizer 53.
In one embodiment, the first dielectric layer 21 is integrally formed with the lower substrate 41.
In one embodiment, the liquid crystal device 40 includes a pixel array layer 44, a liquid crystal layer 43, a common electrode layer 45 and a color filter layer 46, wherein the pixel array layer 44, the liquid crystal layer 43, the common electrode layer 45 and the color filter layer 46 are sequentially stacked along a direction from the lower substrate 41 to the upper substrate 42. Optionally, the color filter layer 46 includes a blue color resist layer 461 disposed corresponding to the blue light antireflection layer 231, a red color resist layer 463 disposed corresponding to the red light antireflection layer 233, a green color resist layer 462 disposed corresponding to the green light antireflection layer 232, and a black matrix 464.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A light-emitting element characterized by comprising:
a photoluminescence component comprising a quantum dot substrate, a quantum dot layer arranged on the quantum dot substrate, green light quantum dots arranged in the quantum dot layer and red light quantum dots arranged in the quantum dot layer;
a backlight assembly positioned at one side of the photoluminescence assembly and configured to generate blue light, the backlight assembly projecting the blue light toward the quantum dot layer and exciting the green light quantum dots to generate green light and exciting the red light quantum dots to generate red light; and
the anti-reflection assembly is positioned on the other side of the photoluminescence assembly and comprises an anti-reflection film, a first dielectric layer and a second dielectric layer, the anti-reflection film is positioned between the first dielectric layer and the second dielectric layer, the quantum dot layer is positioned between the second dielectric layer and the quantum dot substrate, the anti-reflection film comprises a green light anti-reflection layer for enhancing green light, a red light anti-reflection layer for enhancing red light and a blue light anti-reflection layer for enhancing blue light, and the green light anti-reflection layer, the red light anti-reflection layer and the blue light anti-reflection layer are respectively tiled relative to the quantum dot layer.
2. The light-emitting element according to claim 1, wherein: the light-emitting element further comprises a first polarizer, and the first polarizer is located between the second medium layer and the quantum dot layer.
3. The light-emitting element according to claim 1, wherein: the light-emitting element further comprises a second polarizer, and the antireflection assembly is located between the second polarizer and the quantum dot layer.
4. A light-emitting element according to claim 3, wherein: the quantum dot layer is arranged on the quantum dot layer, the antireflection film is arranged on the quantum dot layer in a clearance mode, and the second dielectric layer is an air layer located between the antireflection film and the quantum dot layer.
5. A light-emitting element according to claim 3, wherein: the second dielectric layer is integrally formed with the quantum dot layer.
6. The light-emitting element according to any one of claims 1 to 5, wherein: at least one of the green light antireflection layer, the red light antireflection layer and the blue light antireflection layer is of a multi-film layer structure.
7. The light-emitting element according to any one of claims 1 to 5, wherein: the backlight assembly comprises a back plate arranged opposite to the photoluminescence assembly, a light guide plate arranged between the back plate and the photoluminescence assembly, lamp beads arranged on the back plate and arranged between the back plate and the light guide plate, and a collimation film arranged between the light guide plate and the photoluminescence assembly.
8. A display comprising the light-emitting device according to any one of claims 1 to 7, wherein the display further comprises a lower substrate disposed opposite to the first dielectric layer, an upper substrate disposed opposite to the lower substrate, and a liquid crystal device disposed between the lower substrate and the upper substrate, and further comprises a polarizer disposed on the upper substrate, and the upper substrate is disposed between the liquid crystal device and the polarizer.
9. The display of claim 8, wherein: the first dielectric layer and the lower substrate are integrally formed.
10. The display of claim 8, wherein: the liquid crystal component comprises a pixel array layer, a liquid crystal layer, a common electrode layer and a color filter layer, wherein the pixel array layer, the liquid crystal layer, the common electrode layer and the color filter layer are sequentially stacked along the direction of the lower substrate pointing to the upper substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023343010.5U CN214122626U (en) | 2020-12-31 | 2020-12-31 | Light-emitting element and display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023343010.5U CN214122626U (en) | 2020-12-31 | 2020-12-31 | Light-emitting element and display |
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| Publication Number | Publication Date |
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| CN214122626U true CN214122626U (en) | 2021-09-03 |
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