CN115377273A - Light-emitting panel, display device and backlight module - Google Patents
Light-emitting panel, display device and backlight module Download PDFInfo
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- CN115377273A CN115377273A CN202210724214.8A CN202210724214A CN115377273A CN 115377273 A CN115377273 A CN 115377273A CN 202210724214 A CN202210724214 A CN 202210724214A CN 115377273 A CN115377273 A CN 115377273A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 116
- 238000004806 packaging method and process Methods 0.000 claims abstract description 116
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- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 29
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- 230000000694 effects Effects 0.000 abstract description 26
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/508—Wavelength conversion elements having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- Theoretical Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention discloses a light-emitting panel, a display device and a backlight module. The light-emitting panel comprises an edge light-emitting region and a central light-emitting region, wherein the edge light-emitting region surrounds at least part of the central light-emitting region; the light-emitting panel further comprises packaging glue for coating the edge light-emitting area and the central light-emitting area, the packaging glue comprises a first packaging subsection located on one side, far away from the central light-emitting area, of the edge light-emitting area, and at least a color conversion structure is arranged in the first packaging subsection. In the embodiment of the invention, the color conversion structure is arranged in the first packaging subsection which is positioned at one side of the edge light emitting area far away from the central light emitting area, so that the light of the edge light emitting area can be converted into white light through the color conversion structure, the light of the edge light emitting area is prevented from directly escaping, and the whole light emitting effect of the light emitting panel is improved.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a light-emitting panel, a display device and a backlight module.
Background
The display technology is widely applied to electronic products such as televisions, mobile phones and the like, and the electronic products display colorful pictures, thereby greatly facilitating the life of people.
However, the conventional display device has the problem of side light leakage in the working process, and normal display is influenced.
Disclosure of Invention
The invention provides a light-emitting panel, a display device and a backlight module.
In a first aspect, embodiments of the present invention provide a light-emitting panel comprising a marginal light-emitting region and a central light-emitting region, the marginal light-emitting region surrounding at least part of the central light-emitting region;
the light-emitting panel further comprises packaging glue for coating the edge light-emitting area and the central light-emitting area, the packaging glue comprises a first packaging subsection located on one side, far away from the central light-emitting area, of the edge light-emitting area, and at least a color conversion structure is arranged in the first packaging subsection.
In a second aspect, embodiments of the present invention further provide a display device, including the light-emitting panel according to any one of the first aspects.
In a third aspect, an embodiment of the present invention provides a backlight module including the light-emitting panel of any one of the first aspects.
The embodiment of the invention provides a light-emitting panel which comprises an edge light-emitting area and a central light-emitting area, and the light-emitting panel further comprises packaging glue for coating the edge light-emitting area and the central light-emitting area. Through set up coloured transform structure in being located the first encapsulation subsection that the luminous zone one side was sent out to the marginal luminous zone of keeping away from in the center, can guarantee that the light that the luminous zone was sent out in the marginal is white light through look transform structure conversion, avoids the light of the luminous zone in the marginal directly to escape, promotes the holistic luminous effect of luminescent panel.
Drawings
FIG. 1 is a schematic view showing a structure of a light emitting panel in the related art;
FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A' of FIG. 1;
fig. 3 is a schematic structural diagram of a light-emitting panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 5 is another schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 6 is an enlarged view of area C of FIG. 4;
FIG. 7 is another schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 8 is an enlarged view of area D of FIG. 7;
FIG. 9 is another schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 10 is another schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 11 is an enlarged schematic view of area E in FIG. 10;
FIG. 12 is a schematic diagram of a prism structure according to an embodiment of the present invention;
FIG. 13 is another enlarged schematic view of area E of FIG. 10;
FIG. 14 is another schematic cross-sectional view taken along line B-B' of FIG. 3;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a backlight module according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. It should be noted that the embodiments provided in the embodiments of the present invention can be combined with each other without contradiction.
Fig. 1 isbase:Sub>A schematic view showingbase:Sub>A structure ofbase:Sub>A light emitting panel in the related art, and fig. 2 isbase:Sub>A schematic view showingbase:Sub>A cross-section taken alongbase:Sub>A directionbase:Sub>A-base:Sub>A 'in fig. 1, and referring to fig. 1 and 2,base:Sub>A light emitting panel 10' in the related art includesbase:Sub>A light emitting region 100 'and an encapsulant 200'. Specifically, the light emitting region 100 'includes an edge light emitting region 100A' and a central light emitting region 100B ', and the packaging adhesive 200' is used for covering the edge light emitting region 100A 'and the central light emitting region 100B'. The light m1 emitted from the edge light-emitting region 100A 'directly escapes through the frame 810', i.e., the light color is not converted by the color conversion layer 820', but directly exits as the light color of the light-emitting element 400'. If the light emitting device 400 'included in the light emitting region 100' is a blue light emitting device, a blue edge phenomenon occurs in the light emitting panel 10', which affects the overall light emitting effect of the light emitting panel 10'.
In view of the above-described basic problem, the light-emitting panel in the embodiment of the invention includes an edge light-emitting region surrounding at least part of a central light-emitting region; the light-emitting panel further comprises packaging glue for coating the edge light-emitting area and the central light-emitting area, the packaging glue comprises a first packaging subsection located on one side, far away from the central light-emitting area, of the edge light-emitting area, and at least a color conversion structure is arranged in the first packaging subsection. Adopt above-mentioned technical scheme, through set up coloured transform structure in the first encapsulation subsection that is located the edge and sends out light zone and keep away from center and send out light zone one side promptly, can guarantee that the light of the edge and send out light zone converts white light into through colour transform structure, avoids the light of the edge and sends out light zone directly to escape, promotes the holistic luminous effect of luminescent panel.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a light-emitting panel according to an embodiment of the invention, fig. 4 is a schematic cross-sectional view taken along a direction B-B 'in fig. 3, fig. 5 is another schematic cross-sectional view taken along a direction B-B' in fig. 3, and referring to fig. 3 to fig. 5, the light-emitting panel 10 according to an embodiment of the invention includes an edge light-emitting region 100A and a central light-emitting region 100B, wherein the edge light-emitting region 100A surrounds at least a portion of the central light-emitting region 100B; the light emitting panel 10 further includes a packaging adhesive 200 covering the edge light emitting region 100A and the central light emitting region 100B, the packaging adhesive 200 includes a first packaging subsection 210 located at a side of the edge light emitting region 100A away from the central light emitting region 100B, and at least the first packaging subsection 210 is provided with a color conversion structure 300.
The light-emitting panel 10 includes an edge light-emitting region 100A and a central light-emitting region 100B, each of the edge light-emitting region 100A and the central light-emitting region 100B includes a plurality of light-emitting elements 400, and the plurality of light-emitting elements 400 electrically connected thereto are driven to emit light by the driving substrate 500, so that light emission from the edge light-emitting region 100A and the central light-emitting region 100B, that is, light emission from the light-emitting panel 10 is realized. The driving substrate 500 includes a pixel driving circuit and an insulating layer for isolating each metal layer, which is not particularly limited in the embodiment of the invention.
The light-emitting panel 10 further includes an encapsulation adhesive 200, the encapsulation adhesive 200 is used for covering the edge light-emitting region 100A and the central light-emitting region 100B, and the cured encapsulation adhesive 200 has a certain hardness, so as to ensure the shapes of the edge light-emitting region 100A and the central light-emitting region 100B and protect the light-emitting elements 400 on the edge light-emitting region 100A and the central light-emitting region 100B. For example, the material of the encapsulation adhesive 200 may be epoxy resin, organic silicon gel, or polyurethane, which is not specifically limited in this embodiment of the invention.
Further, the packaging adhesive 200 includes a first packaging adhesive subsection 210, and the first packaging adhesive subsection 210 is located at a side of the edge light emitting region 100A away from the central light emitting region 100B, that is, as shown in fig. 4, the first packaging adhesive subsection 210 may be the packaging adhesive 200 that entirely coats the light emitting element 400 in the edge light emitting region 100A, or, as shown in fig. 5, the first packaging adhesive subsection 210 may be the packaging adhesive 200 that coats the side of the light emitting element 400 in the edge light emitting region 100A away from the light emitting element 400 in the central light emitting region 100B. The position of the first packaging adhesive sub-section 210 is not particularly limited in the embodiment of the present invention.
Specifically, the edge light emitting region 100A surrounds at least a portion of the central light emitting region 100B, light emitted from the light emitting panel 10 in the central light emitting region 100B can be output to a central region of the light emitting panel 10 along a thickness direction of the light emitting panel 10, specifically, a film layer above the light emitting element 400, such as the light conversion layer 820, quantum dots or fluorescent powder are doped in the light conversion layer 820, light emitted from the light emitting element 400 is excited and converted by the quantum dots or fluorescent powder doped in the light conversion layer 820, and output of white light is achieved, and the film layer between the encapsulant 200 and the light conversion layer 820 is not specifically limited in the embodiment of the present invention. However, light emitted from the edge light-emitting region 100A may escape to the periphery, that is, not through the film layer above the light-emitting panel 10, and directly escape from the side of the light-emitting panel 10. For example, the light m is emitted from the edge light emitting region 100A near the bezel 810 and does not pass through the color conversion layer 820, that is, the light m appears at the light emitting panel 10 with the light emitting color of the light emitting element 400, and other color edges appear at the edge of the light emitting panel 10, for example, when the light emitting element 400 is a blue light emitting element, a blue edge phenomenon appears at the edge region of the light emitting panel 10, which affects the light emitting effect of the light emitting panel 10 as a whole. In order to avoid the above situation, the color conversion particles 300 are disposed in the first packaging branch 210, and the light in the edge light-emitting region 100A can be color-converted by the color conversion particles 300, so as to realize the escape of white light, avoid the edge of the light-emitting panel 10 from generating other color edges, such as blue edge, and ensure the light-emitting effect of the light-emitting panel 10 as a whole. The material of the color conversion particles 300 may be quantum dots, fluorescent powder, or the like, which is not specifically limited in this embodiment of the present invention.
In summary, according to the light-emitting panel provided by the embodiment of the invention, the colored conversion structure is arranged in the first packaging subsection which is located on the side of the edge light-emitting region far from the central light-emitting region, so that light in the edge light-emitting region can be converted into white light through the colored conversion structure, the light in the edge light-emitting region is prevented from directly escaping, and the overall light-emitting effect of the light-emitting panel is improved.
Fig. 6 is an enlarged schematic view of the area C in fig. 4, and referring to fig. 4 to fig. 6, the distribution density of the color conversion structures 300 in the first package subsection 210 gradually increases along the direction X from the central light-emitting region 100B to the edge light-emitting region 100A.
The first package subsection 210 has a color conversion structure 300 disposed therein for performing color conversion on the light emitted from the edge light-emitting region 100A. Specifically, referring to fig. 6, the concentration of the color conversion structures 300 in the first packaging subsection 210 may be set gradually, that is, the concentration of the distribution of the color conversion structures 300 in the first packaging subsection 210 gradually increases along the direction X in which the central light emitting region 100B points to the edge light emitting region 100A, so as to further optimize the light emitting effect of the light emitting panel 10.
Specifically, the light emitted from the edge light emitting region 100A close to the central light emitting region 100B can be the same as the light emitted from the central light emitting region 100B, and the light can be converted by a film above the light emitting panel 10, such as the light conversion layer 820, so as to output white light; the light emitted from the edge light-emitting region 100A far from the central light-emitting region 100B is converted in color by the color conversion structure 300 in the first packaging adhesive subsection 210, so that in the first packaging adhesive subsection 210, the color conversion structure 300 with smaller concentration or no color conversion structure 300 is arranged in the first packaging adhesive subsection 210 near the central light-emitting region 100B, but the packaging adhesive 200 far from the central light-emitting region 100B is provided with the color conversion structure 300 with larger concentration, and based on the gradual increase of the distribution concentration of the color conversion structure 300 in the first packaging subsection 210, the color conversion structure 300 with gradual concentration is the color conversion structure 300 with gradual concentration, the light emitted from the edge light-emitting region 100A can be converted into the light with the required color after effective conversion, the light-emitting effect of the edge light-emitting region 100A is ensured, and the overall light-emitting effect of the light-emitting panel 10 is further ensured.
With continued reference to fig. 6, the blue light emitting device 400 is disposed in the edge light emitting region 100A, and the color conversion structure 300 includes a yellow color conversion structure 310A; the maximum distribution density of the color conversion structures 300 in the first encapsulation subsection 210 is C1, and the minimum distribution density is C2; wherein 0 is formed by C1-C2 which is less than or equal to 25 percent.
Specifically, if the blue light emitting element 400 is disposed in the edge light emitting region 100A, and the color conversion structure 300 is not disposed in the first packaging subsection 210, the blue light emitted by the blue light emitting element 400 in the edge light emitting region 100A directly escapes from the edge of the light emitting panel 10, i.e., between the first packaging subsection 210 and the glue frame 810, so that the blue edge phenomenon exists in the light emitting panel 10. The blue edge phenomenon of the light-emitting panel 10 is solved by disposing the yellow color conversion structure 310A in the first package subsection 210 located at the side of the edge light-emitting region 100A away from the center light-emitting region 100B to convert the blue light into the white light.
Illustratively, in the direction X in which the central light-emitting region 100B is directed toward the edge light-emitting regions 100A, the distribution concentration of the color conversion structures 300 in the first packaging subsection 210 gradually increases, i.e., in the case where the color conversion structure 300 is a yellow color conversion structure 310A, the minimum distribution concentration of the color conversion structures 300 in the first packaging subsection 210 near the central light-emitting region 100B is C2, the maximum distribution concentration of the color conversion structures 300 in the first packaging subsection 210 far from the central light-emitting region 100B is C1, and 0< -C1-C2 > is equal to or less than 25%, i.e., the gradient range of the concentration of the color conversion structures 300 is 0-25%. In particular, the concentration of the color conversion structure 300 cannot be too high due to process limitations of doping of the color conversion structure 300 in the first package subsection 210. Meanwhile, the quantity of light emitted by the light emitting element 400 in the first packaging subsection 210 is limited, and the color conversion structure 300 with too high concentration does not need to be arranged in the first packaging subsection 210, that is, the gradient range of the concentration of the color conversion structure 300 is set to be 0-25% in consideration of the doping process of the color conversion structure 300 and the light excitation efficiency, so that the doping process of the color conversion structure 300 is simple, and the blue light emitting element 400 arranged in the edge light emitting area 100A can be ensured to sufficiently excite the yellow color conversion structure 310A, so that the color conversion is sufficiently performed, and the conversion efficiency is ensured.
With continued reference to fig. 6, a blue light emitting element 400 is disposed in the edge light emitting region 100A, and the color conversion structure 300 includes a red color conversion structure 310B and a green color conversion structure 310C; the maximum distribution density of the color conversion structures 300 in the first packaging subsection 210 is C3, and the minimum distribution density is C4; wherein 0 is formed by the yarns C3-C4 being less than or equal to 31.5 percent.
Specifically, if the blue light emitting element 400 is disposed in the edge light emitting region 100A, and the color conversion structure 300 is not disposed in the first packaging branch 210, the blue light emitted by the blue light emitting element 400 in the edge light emitting region 100A directly escapes from the edge of the light emitting panel 10, so that the blue edge phenomenon exists in the light emitting panel 10. The blue edge phenomenon of the light-emitting panel 10 is solved by providing the red color conversion structure 310B and the green color conversion structure 310C in the first package subsection 210 which is located at the side of the edge light-emitting region 100A away from the center light-emitting region 100B to convert the blue light into the white light,
illustratively, in the direction X in which the central light-emitting region 100B is directed toward the edge light-emitting regions 100A, the distribution concentration of the color conversion structures 300 in the first packaging subsection 210 gradually increases, i.e., in the case where the color conversion structures 300 are red color conversion structures 310B and green color conversion structures 310C, the minimum distribution concentration of the color conversion structures 300 in the first packaging subsection 210 near the central light-emitting region 100B is C4, the maximum distribution concentration of the color conversion structures 300 in the first packaging subsection 210 far from the central light-emitting region 100B is C3, and 0< -C3-C4 > 31.5%, i.e., the gradient range of the concentration of the color conversion structures 300 is 0-31.5%. In particular, the concentration of the color conversion structure 300 cannot be too high due to process limitations of doping of the color conversion structure 300 in the first package subsection 210. Meanwhile, the quantity of light emitted by the light emitting element 400 in the first packaging subsection 210 is limited, and the color conversion structure 300 with too high concentration does not need to be arranged in the first packaging subsection 210, that is, the gradient range of the concentration of the color conversion structure 300 is set to be 0-31.5% in consideration of the doping process of the color conversion structure 300 and the light excitation efficiency, so that the doping process of the color conversion structure 300 is simple, and the blue light emitting element 400 arranged in the edge light emitting region 100A can be ensured to sufficiently excite the red light color conversion structure 310B and the green light color conversion structure 310C, so that the color conversion is sufficiently performed, and the conversion efficiency is ensured.
Fig. 7 is another schematic cross-sectional view taken along the direction B-B' in fig. 3, and referring to fig. 7, the edge light-emitting region 100A is provided with an edge light-emitting element 410, and the central light-emitting region 100B is provided with a central light-emitting element 420; the package glue 200 further comprises a second package subsection 220 located at the light-emitting side of the edge light-emitting device 410 and a third package subsection 230 located at the light-emitting side of the central light-emitting device 420; the second package subsection 220 is provided with a color transition structure 300, the second package subsection 220 is provided integrally with the first package subsection 210, and the second package subsection 220 is provided independently from the third package subsection 230.
Specifically, the package adhesive 200 includes a first package subsection 210, a second package subsection 220 and a third package subsection 230, wherein the first package subsection 210 and the second package subsection 220 are both located at the edge light emitting area 100A, and the third package subsection 230 is located at the center light emitting area 100B.
Specifically, the second packaging subsection 220 covers the light-emitting side of the edge light-emitting element 410, the third packaging subsection 230 covers the light-emitting side of the central light-emitting element 420, the first packaging subsection 210 is located at a side of the second packaging subsection 220 away from the third packaging subsection 230, the first packaging subsection 210 is used for covering the side light-emitting position of the edge light-emitting element 410, and the light conversion structure 300 in the first packaging subsection 210 is used for preventing light of the edge light-emitting element 410 from directly escaping, so that the overall light-emitting effect of the light-emitting panel 10 is ensured.
Further, the light conversion structure 300 is disposed in the second packaging subsection 220, but the light conversion structure 300 is not disposed in the third packaging subsection 230, and the light emitting elements 400 covered by the second packaging subsection 220 and the third packaging subsection 230 are different, so the second packaging subsection 220 and the third packaging subsection 230 are independently disposed by adopting different preparation processes. However, the light conversion structures 300 are disposed in both the first and second package subsections 210, 220, and both the first and second package subsections 210, 220 encapsulate the edge light emitting element 410, so the same manufacturing process is used for the first and second package subsections 210, 220 in order to save the cost of the manufacturing process.
Fig. 8 is an enlarged schematic view of the area D in fig. 7, and referring to fig. 7 and 8, the distribution density of the color conversion structures 300 in the second packaging subsection 220 is smaller than the distribution density of the color conversion structures 300 in the first packaging subsection 210.
The second sub-packaging portion 220 may be provided with a color conversion structure 300, so as to further ensure that light from the edge light-emitting element 410 does not directly escape, and better ensure the overall light-emitting effect of the light-emitting panel 10.
Further, the light emitted from the edge light-emitting device 410 is converted in the light-emitting color through the color conversion structure 300, and if the concentration of the color conversion structure 300 in the second packaging sub-section 220 is too high, the light in the second packaging sub-section 220 is converted in the light-emitting color to an excessive degree, so that the converted light is too obvious in color, and the light-emitting effect of the whole light-emitting panel 10 is also affected. For example, if the color conversion structure 300 is a yellow color conversion structure, if the concentration of the color conversion structure 300 in the second sub-packaging portion 220 is too high, the light-emitting panel 10 may have a yellow edge phenomenon, which affects the light-emitting effect of the light-emitting panel 10. Specifically, the concentration of the color conversion structures 300 in the second packaging subsection 220 is ensured to be smaller than the distribution concentration of the color conversion structures 300 in the first packaging subsection 210, so that the overall light emitting effect of the light emitting panel 10 is ensured.
Fig. 9 is another schematic cross-sectional view taken along the direction B-B' in fig. 3, and referring to fig. 9, the edge light-emitting region 100A includes an edge light-emitting element 410, and the central light-emitting region 100B includes a central light-emitting element 420; the package adhesive 200 further includes a fourth package subsection 240 located at the light-emitting side of the edge light-emitting device 410 and the light-emitting side of the center light-emitting device 420; the fourth package section 240 is provided separately from the first package section 210.
Specifically, the light emitting element 400 includes an edge light emitting element 410 and a center light emitting element 420, and the edge light emitting element 410 and the center light emitting element 420 may be blue light emitting elements, which is not particularly limited in the embodiment of the present invention. Meanwhile, the specific number of the edge light emitting elements 410 and the center light emitting elements 420 is not particularly limited in the embodiments of the present invention. Further, the package glue 200 comprises a first package subsection 210 and a fourth package subsection 240, wherein the first package subsection 210 is located at the edge light emitting area 100A and the fourth package subsection 240 is located at the central light emitting area 100B.
Specifically, the first sub-packaging part 210 is located at a side of the edge light emitting region 100A away from the central light emitting region 100B, the fourth sub-packaging part 220 covers the light emitting sides of the edge light emitting device 410 and the central light emitting device 420, and the light conversion structure 300 in the first sub-packaging part 210 is used for preventing light from directly escaping from the edge light emitting device 410, so as to ensure the overall light emitting effect of the light emitting panel 10.
Further, the first packaging subsection 210 and the fourth packaging subsection 240 are coated at different positions, and the light conversion structure 300 is disposed in the first packaging subsection 210, and the light conversion structure 300 is not disposed in the fourth packaging subsection 240, so that different preparation processes are adopted and the light conversion structure is independently disposed.
Fig. 10 is another schematic cross-sectional view taken along the direction B-B' in fig. 3, wherein fig. 10 shows a prism structure 600 disposed on a side of the first packaging sub-section 210 away from the central light emitting region 100A; the prism structure 600 is used for adjusting the light emitted from the first packaging part 210 to be incident to the light receiving area 700; the light receiving area 700 overlaps the first packaging section 210 along the direction X in which the central light emitting area 100B points to the edge light emitting areas 100A.
Wherein, the structure of the first packaging sub-section 210 is further optimized to more effectively prevent the light from the edge light-emitting region 100A from directly escaping. Specifically, referring to fig. 10, the prism structure 600 is disposed on a side of the first packaging sub-section 210 away from the central light emitting region 100A, and the prism structure 600 can collect light emitted from the light emitting element 400 in the edge light emitting region 100A along the side, i.e., regulate and control the transmission path of the light, so as to ensure that the light is transmitted to the optical receiving region 700, and then is reflected back to the first packaging sub-section 210 through the light receiving region 700, thereby preventing the light from directly escaping outwards, causing blue edge phenomenon, and the like, which affect the light emitting display effect of the light emitting panel 10.
For example, the light receiving area 700 may be an area of the frame 810 for receiving the light emitted from the first package sub-assembly 210. Based on the prism structure 600, the transmission path of the light emitted through the first packaging sub-section 210 is adjusted and controlled, so as to prevent a part of the light from directly escaping without meeting the color conversion structure 300 in the first packaging sub-section 210 and exciting the change of the color of the light. That is, the prism structure 600 is provided on the basis of providing the first packaging branch 210 and providing the color conversion structure 300 in the first packaging branch 210, so as to more reliably prevent the light from the edge light-emitting region 100A from directly escaping, and improve the overall light-emitting effect of the light-emitting panel 10.
Further, fig. 11 is an enlarged schematic view of an area E in fig. 10, and referring to fig. 10 and 11, a height L1 of the light receiving area 700 is smaller than a height L2 of the first packaging sub-section 210 in a thickness direction h of the light emitting panel 10.
The light receiving area 700 may be a plastic frame, that is, the light receiving area 700 is an area in the plastic frame for receiving the light emitted through the first packaging sub-section 210. Along the thickness direction h of luminescent panel 10, the height of light receiving area 700 is L1, and the height of first encapsulation subsection 210 is L2 to L1 is less than L2, can guarantee through setting up prism structure 600, and the light that the marginal luminescent area 100A sent has regulated and control its transmission path through first encapsulation subsection 210, guarantees that the light that the marginal luminescent area 100A sent assembles, avoids the light of the marginal luminescent area 100A directly to escape, promotes the holistic luminous effect of luminescent panel 10.
Fig. 12 is a schematic structural view of a prism structure according to an embodiment of the present invention, and referring to fig. 10 to 12, the prism structure 600 includes a plurality of protrusions 610 of the first packaging sub-section 210 away from the central light emitting region 100B.
The prism structure 600 may include a plurality of protrusions 610, and the plurality of protrusions 610 may be used to adjust a light transmission path through which light passing through the prism structure 600 is converged. Specifically, referring to fig. 12, when the light is transmitted to the prism structure 600 through the first packaging sub-assembly 210, the prism structure 600 including the protrusions 610 can adjust the light transmission paths of the light with a plurality of incident angles, so as to prevent the light in the edge light-emitting region 100A from directly escaping, and improve the overall light-emitting effect of the light-emitting panel 10.
For example, the protrusion 610 may be a right-angle protrusion, such as the incident angle c1 of the light ray a1 and the incident angle c2 of the light ray a2 in fig. 12, and at a smaller incident angle, the light ray a1 and the light ray a2 are totally reflected, and both the reflected light rays b1 and b2 return to the inside of the first packaging part 210, and there is no case that the light rays of the edge light emitting region 100A directly escape. Further, as shown in fig. 12, the incident angle c3 of the light ray a3 and the incident angle c4 of the light ray a4 are reflected, the light ray a3 and the light ray a4 are refracted, the structure of the protrusion 610 can be regarded as a convex lens, which has a function of converging light rays, and the refracted light rays b3 and b4 are transmitted to the light receiving area 700 in a converging manner, so as to prevent the light rays in the edge light emitting area 100A from directly escaping. Further, as shown in fig. 12, the incident angle c5 of the light ray a5 is larger, at which the light ray a5 is reflected first inside the protrusion and then totally reflected or refracted again inside the protrusion 610. Illustratively, the light ray a5 finally exits as b5, i.e. the light ray a5 is reflected at the protrusion 610 first and then totally reflected due to the smaller incident angle after reflection. For example, the light ray a5 finally exits in the form of b6, that is, the light ray a5 is reflected at the protrusion 610 first, and then refracted again due to the larger incident angle after reflection, so as to enter the next protrusion 610. The embodiment of the present invention does not limit the specific incident angle value. In summary, as shown in fig. 12, the prism structure 600 and the protrusion 610 can better prevent light from the edge light-emitting region 100A from directly escaping, so as to improve the overall light-emitting effect of the light-emitting panel 10, and the protrusion 610 is a right-angled protrusion, so that the preparation regularity can be ensured, and the normal line of the light can be ensured to be perpendicular to the protrusion 610, which is beneficial to implementing the above-mentioned reflection and refraction conditions.
Fig. 13 is another enlarged view of a region E in fig. 10, and referring to fig. 13, the plurality of protrusions 610 include a plurality of first protrusions 610A, a plurality of second protrusions 610B, and a plurality of third protrusions 610C; the first protrusion 610A and the third protrusion 610C are provided on both sides of the second protrusion 610B in the thickness direction h of the light emitting panel 10; along the direction X in which the central light emitting region 100B points to the edge light emitting region 100A, the height of the first protrusion 610A is h1, the height of the second protrusion 610B is h2, and the height of the third protrusion 610C is h3; wherein h1 is more than or equal to h2, and h3 is more than or equal to h2; in the thickness direction h of the light-emitting panel 10, the distance between adjacent two first protrusions 610A is p1, the distance between adjacent two second protrusions 610B is p2, and the distance between adjacent two third protrusions 610C is p3; wherein p1 is more than or equal to p2, and p3 is more than or equal to p2.
Among them, the plurality of protrusions 610 that the prism structure 600 may include may be differently sized at different positions. Specifically, as shown in fig. 13, the plurality of protrusions 610 include a first protrusion 610A, a second protrusion 610B, and a third protrusion 610C, and the first protrusion 610A is located on a side of the second protrusion 610B away from the third protrusion 610C, and the third protrusion 610C is located on a side of the second protrusion 610B away from the first protrusion 610A, while the number of the first protrusion 610A, the second protrusion 610B, and the third protrusion 610C may be multiple, which is not specifically limited in the embodiment of the present invention. By providing the protrusions 610 with different sizes and positions, light emitted from the edge light-emitting region 100A is better prevented from directly escaping, and the overall light-emitting effect of the light-emitting panel 10 is improved.
Further, the heights of the first protrusions 610A and the third protrusions 610C are slightly higher than the heights of the second protrusions 610B, i.e., the protrusions 610 of the entire prism structure 600 appear to have a tendency to be depressed from the central region toward the central light emitting region 100B. Specifically, the heights of the first protrusion 610A and the third protrusion 610C of the prism structure 600 are larger, so as to prevent the light in the second protrusion 610B from being transmitted to the other protrusions 610 at two sides under the condition of a larger incident angle, i.e., to more reliably ensure that the light emitted from the edge light emitting region 100A does not directly escape at the edge of the prism structure 600 under various incident angles.
Illustratively, referring to FIG. 13, the height h1 of the first protrusion 610A is greater than the height h2 of the second protrusion 610B, while the height h3 of the third protrusion 610C is also greater than the height h2 of the second protrusion 610B. In the case of satisfying the height requirement, the protrusions 610 are rectangular protrusions, so that it is adaptive that the distance p1 between two adjacent first protrusions 610A is greater than the distance p2 between two adjacent second protrusions 610B, and the distance p3 between two adjacent third protrusions 610C is greater than the distance p2 between two adjacent second protrusions 610B. The embodiment of the invention does not limit the specific numerical values of the height of the protrusions and the distance between the adjacent protrusions.
Fig. 14 is another schematic cross-sectional view taken along the direction B-B' in fig. 3, and referring to fig. 14, the luminescent panel 10 includes a first luminescent region 101 and a second luminescent region 102, the luminescent brightness of the first luminescent region 101 being greater than that of the second luminescent region 102; the first light emitting region 101 and the second light emitting region 102 each include a partial edge light emitting region 100A, and the distribution density of the color conversion structure 300 in the first light emitting region 101 is greater than the distribution density of the color conversion structure 300 in the second light emitting region 102.
The light-emitting panel 10 includes a first light-emitting region 101 and a second light-emitting region 102, and the light-emitting luminance of the first light-emitting region 101 is greater than the light-emitting luminance of the second light-emitting region 102, that is, the first light-emitting region 101 is a highlight region, and the second light-emitting region 102 is a low-light region, so that local luminance adjustment can be more finely realized by setting the low-light region and the highlight region, and the light-emitting effect of the light-emitting panel 10 is improved.
Specifically, the first light emitting region 101 and the second light emitting region 102 each include a partial edge light emitting region 100A, as shown in fig. 14. The light-emitting panel 10 provided by the embodiment of the invention can improve different light-emitting luminances of different light-emitting areas by adjusting the distribution concentration of the color conversion structure 300 in the first packaging adhesive sub-section 210. Illustratively, the distribution density of the color conversion structure 300 in the first light emitting zone 101 is greater than that of the color conversion structure 300 in the second light emitting zone 102, that is, more light is excited to be converted into white light in the first light emitting zone 101 than in the second light emitting zone 102, so as to achieve higher light output of the first light emitting zone 101. The embodiment of the present invention does not limit the specific value of the distribution density of the color conversion structure 300.
In the same inventive concept, an embodiment of the present invention further provides a display device, fig. 15 is a schematic structural diagram of the display device according to the embodiment of the present invention, and as shown in fig. 15, the display device 1 includes the light emitting panel 10 according to any embodiment of the present invention, so that the display device 1 according to the embodiment of the present invention has the technical effects of any of the above embodiments, and the explanation of the same or corresponding structures and terms as the above embodiments is not repeated herein.
The display device 1 provided by the embodiment of the present invention may be a mobile phone shown in fig. 15, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
Based on the same inventive concept, an embodiment of the present invention further provides a backlight module, fig. 16 is a schematic structural diagram of the backlight module provided in the embodiment of the present invention, as shown in fig. 16, the backlight module 20 includes the light-emitting panel 10 according to any embodiment of the present invention, and further includes an optical structure 800 located on the light-emitting side of the light-emitting panel 10, and the optical structure 800 may include, for example, a diffusion sheet, a brightness enhancement film, a light-homogenizing film and other optical films which are stacked, so as to facilitate improvement of the light-emitting effect of the backlight module 2. The embodiment of the present invention does not limit the specific structure of the optical structure 800. The backlight module 2 provided by the embodiment of the present invention has the technical effects of the technical solutions in any of the above embodiments, and the structures and terms identical to or corresponding to those in the above embodiments are not repeated herein.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A light emitting panel comprising an edge light emitting region and a center light emitting region, the edge light emitting region surrounding at least a portion of the center light emitting region;
the light-emitting panel further comprises packaging glue for coating the edge light-emitting area and the central light-emitting area, the packaging glue comprises a first packaging subsection located on one side, away from the central light-emitting area, of the edge light-emitting area, and at least a colored conversion structure is arranged in the first packaging subsection.
2. The luminescent panel according to claim 1, wherein a distribution density of the color conversion structures in the first package subsection gradually increases in a direction in which the center light-emitting region is directed toward the edge light-emitting regions.
3. The luminescent panel according to claim 2, wherein a blue light emitting element is provided in the edge luminescent region, and the color conversion structure comprises a yellow color conversion structure;
the maximum distribution concentration of the color conversion structures in the first packaging subsection is C1, and the minimum distribution concentration is C2;
wherein 0 is formed by C1-C2 which is less than or equal to 25 percent.
4. The luminescent panel according to claim 2, wherein a blue light emitting element is provided in the edge luminescent region, and the color conversion structure includes a red color conversion structure and a green color conversion structure;
the maximum distribution concentration of the color conversion structures in the first packaging subsection is C3, and the minimum distribution concentration of the color conversion structures in the first packaging subsection is C4;
wherein 0 is formed by the yarns C3-C4 being less than or equal to 31.5 percent.
5. The luminescent panel according to claim 1, wherein the edge light emitting region is provided with edge light emitting elements, and the center light emitting region is provided with a center light emitting element;
the packaging adhesive also comprises a second packaging subsection positioned at the light-emitting side of the edge light-emitting element and a third packaging subsection positioned at the light-emitting side of the central light-emitting element;
the second packaging subsection is provided with the color conversion structure, the second packaging subsection and the first packaging subsection are integrally arranged, and the second packaging subsection and the third packaging subsection are independently arranged.
6. The luminescent panel according to claim 5, wherein a distribution density of the color conversion structure in the second package subsection is smaller than a distribution density of the color conversion structure in the first package subsection.
7. The luminescent panel according to claim 1, wherein the edge light emitting region comprises edge light emitting elements, and the center light emitting region comprises a center light emitting element;
the packaging adhesive also comprises a fourth packaging subsection positioned at the light-emitting side of the edge light-emitting element and the light-emitting side of the central light-emitting element;
the fourth packaging subsection is arranged independently from the first packaging subsection.
8. A light-emitting panel as claimed in claim 1, characterized in that a side of the first packaging section remote from the central light-emitting region is provided with a prismatic structure;
the prism structure is used for adjusting the light emitted by the first packaging subsection to be incident to the light receiving area;
the light receiving area overlaps the first package section in a direction in which the central light emitting area is directed toward the edge light emitting areas.
9. The light emitting panel of claim 8, wherein the light receiving area has a height in the thickness direction of the light emitting panel that is less than the height of the first packaging section.
10. The light-emitting panel of claim 8, wherein the prismatic structure includes a plurality of protrusions of the first package section away from the central light-emitting region.
11. The luminescent panel according to claim 10, wherein the plurality of projections includes a plurality of first projections, a plurality of second projections, and a plurality of third projections;
the first protrusion and the third protrusion are arranged on two sides of the second protrusion along the thickness direction of the light emitting panel;
in the direction of pointing to the edge light emitting area along the central light emitting area, the height of the first protrusion is h1, the height of the second protrusion is h2, and the height of the third protrusion is h3; wherein h1 is more than or equal to h2, and h3 is more than or equal to h2;
along the thickness direction of the light-emitting panel, the distance between every two adjacent first protrusions is p1, the distance between every two adjacent second protrusions is p2, and the distance between every two adjacent third protrusions is p3; wherein p1 is more than or equal to p2, and p3 is more than or equal to p2.
12. The luminescent panel according to claim 1, wherein the luminescent panel comprises a first luminescent region and a second luminescent region, the first luminescent region having a luminescent brightness larger than a luminescent brightness of the second luminescent region;
the first light emitting area and the second light emitting area both comprise part of the edge light emitting areas, and the distribution concentration of the color conversion structures in the first light emitting area is greater than that in the second light emitting area.
13. A display device characterized by comprising the light-emitting panel according to any one of claims 1 to 12.
14. A backlight module comprising the light-emitting panel according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210724214.8A CN115377273A (en) | 2022-06-23 | 2022-06-23 | Light-emitting panel, display device and backlight module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210724214.8A CN115377273A (en) | 2022-06-23 | 2022-06-23 | Light-emitting panel, display device and backlight module |
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| CN115377273A true CN115377273A (en) | 2022-11-22 |
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| CN202210724214.8A Pending CN115377273A (en) | 2022-06-23 | 2022-06-23 | Light-emitting panel, display device and backlight module |
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