CN114388680A - Light emitting device - Google Patents
Light emitting device Download PDFInfo
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- CN114388680A CN114388680A CN202011137860.1A CN202011137860A CN114388680A CN 114388680 A CN114388680 A CN 114388680A CN 202011137860 A CN202011137860 A CN 202011137860A CN 114388680 A CN114388680 A CN 114388680A
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- light
- guide structure
- emitting device
- light guide
- light emitting
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- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
- H01L33/58—Optical field-shaping elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
Abstract
A light-emitting device comprises a substrate, a plurality of light-emitting elements and a light guide structure. The light emitting element is disposed on the substrate. The light guide structure is arranged on the substrate, the light emitting element is separated by the light guide structure and continuously surrounds the light emitting element, the light guide structure and the light emitting element are separated from each other, light energy emitted by the light emitting element enters the light guide structure to enable the light guide structure to emit light, and the light guide structure is made of materials with the refractive index of 1.1-3. The light guide structure can ensure that the light-emitting device still has good brightness uniformity under the conditions of greatly reducing the number of the light-emitting diodes and adopting a thinner diffusion structure.
Description
Technical Field
The invention relates to a light-emitting device comprising a light guide structure.
Background
Displays that cannot emit light themselves may use a backlight module to obtain a supply of light sources. Generally, the backlight module can be divided into an edge type (edge type) and a direct type (direct type).
In the direct-type backlight module, a diffusion sheet is disposed on the led array to reduce the brightness non-uniformity (Mura) of the display. In order to improve the phenomenon of brightness unevenness, it is also conceivable to increase the number of light emitting diodes or to increase the Optical Distance (OD). However, increasing the number of leds increases material costs and manufacturing costs. Increasing the optical distance makes the backlight module thicker, which is not favorable for thinning the backlight module.
Therefore, how to improve the uneven brightness without increasing the number of the leds and the optical distance is an urgent issue to be solved in the art.
Disclosure of Invention
In order to solve the above problems, the present invention provides a light emitting device, which can partially reflect, partially refract and partially transmit light emitted from a light emitting diode properly by a special light guide structure, thereby improving the phenomenon of uneven brightness without increasing the number of light emitting diodes and increasing the optical distance. The light guide structure of the invention can ensure that the light-emitting device still has good brightness uniformity even under the condition of greatly reducing the number of the light-emitting diodes.
The light-emitting device provided by the invention comprises a substrate, a plurality of light-emitting elements and a light guide structure. The light emitting element is disposed on the substrate. The light guide structure is arranged on the substrate, the light emitting element is separated by the light guide structure and continuously surrounds the light emitting element, the light guide structure and the light emitting element are separated from each other, light energy emitted by the light emitting element enters the light guide structure to enable the light guide structure to emit light, and the light guide structure is made of materials with the refractive index of 1.1-3.
According to some embodiments of the invention, the material comprises silicone, polymethyl methacrylate (PMMA), epoxy, glass, quartz, inorganic particles, or combinations thereof.
According to some embodiments of the invention, the inorganic particles are selected from the group consisting of alumina, barium sulfate, magnesia, zirconia, and silica.
According to some embodiments of the present invention, the light emitting device further includes a diffusion structure disposed on the light emitting element, the light guide structure and the substrate, the diffusion structure contacting the light guide structure.
According to some embodiments of the present invention, a width of the light guide structure between two adjacent ones of the light emitting elements is larger than a distance between the light guide structure and one of the two adjacent light emitting elements.
According to some embodiments of the invention, the ratio of width to distance is greater than or equal to 3.
According to some embodiments of the present invention, the light emitting device further includes an encapsulant filled between the light guide structure and the light emitting element, the encapsulant being made of another material having a refractive index greater than or equal to 1.1 and less than 1.6.
According to some embodiments of the present invention, the light guide structure includes a plurality of light guide units, each of which continuously surrounds one of the light emitting elements.
According to some embodiments of the invention, the light guide structure has a visible light transmittance that is greater than a visible light reflectance of the light guide structure.
According to some embodiments of the invention, the material is a translucent material.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the invention claimed.
Drawings
The invention may be more completely understood in consideration of the following detailed description of embodiments and with reference to the accompanying drawings, in which:
fig. 1 is a schematic top view of a light emitting device according to some embodiments of the present invention;
FIG. 2 is a schematic cross-sectional view of a light emitting device according to some embodiments of the present invention;
FIG. 3 is a schematic cross-sectional view of a light emitting device according to some embodiments of the present invention;
FIG. 4 is a photographic image of a light emitting device with a non-light emitting element according to an embodiment of the present invention, the light emitting device including a light emitting element and a light guiding structure;
FIG. 5 is a photographic image of the light-emitting device of FIG. 4 when the light-emitting element emits light;
FIG. 6 is a photographic image of a light-emitting device including a light-emitting element, a light-guiding structure and a diffusion structure when the light-emitting element emits light according to an embodiment of the present invention;
fig. 7 is a photographic image of a light-emitting device including a light-emitting element, a light-guiding structure, a diffusion structure, and a quantum dot film when the light-emitting element emits light according to an embodiment of the present invention;
fig. 8 is a Charge Coupled Device (CCD) luminance/chrominance image of the light-emitting device of fig. 7 when the light-emitting element emits light.
[ notation ] to show
10 light emitting device
110 base plate
120 light emitting element
130 light guide structure
130a light guide unit
140 diffusion structure
150 packaging material
D1 distance
H1, H2 height
OD optical distance
W1 width
Detailed Description
In order to make the description of the invention more complete and complete, the following illustrative description is given of embodiments and examples of the invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments disclosed below may be combined with or substituted for one another as desired, or additional embodiments may be added to one embodiment without further recitation. In the following description, numerous specific details are set forth to provide a thorough understanding of the following embodiments. However, embodiments of the invention may be practiced without these specific details.
Furthermore, spatially relative terms, such as "below," "above," and the like, are used herein for ease of describing the relative relationship of one element or feature to another element or feature in the figures. The true meaning of these spatially relative terms encompasses other orientations. For example, when the drawings are turned over 180 degrees, the relationship of one element to another may change from "below" to "above". The spatially relative descriptors used herein should be interpreted as such.
As described above, the present invention provides a light emitting device, which can partially reflect, partially refract and partially transmit light emitted from a light emitting diode by a special light guide structure, thereby improving the phenomenon of uneven brightness without increasing the number of light emitting diodes and increasing the optical distance. It is noted that the light guide structure of the present invention can maintain good brightness uniformity of the light emitting device even when the number of the light emitting diodes is greatly reduced. Several embodiments of the light emitting device of the present invention will be described in detail below.
Fig. 1 is a schematic top view of a light emitting device according to some embodiments of the present invention. Fig. 2 is a schematic cross-sectional view of a light emitting device according to some embodiments of the present invention. As shown in fig. 1 and 2, the light emitting device 10 includes a substrate 110, a plurality of light emitting elements 120, and a light guide structure 130.
As shown in fig. 2, the light emitting element 120 is disposed on the substrate 110. In some embodiments, the light emitting element 120 contacts the substrate 110. In some embodiments, the light emitting elements 120 are light emitting diodes.
As shown in fig. 2, the light guide structure 130 is disposed on the substrate 110. In some embodiments, the light guide structure 130 contacts the substrate 110. As shown in fig. 2, the light guide structure 130 does not emit light, but the light emitted from the light emitting element 120 passes through a gas medium (e.g., air, refractive index is 1) and then refracts into the light guide structure 130, so that the light guide structure 130 emits light, thereby effectively improving the luminance uniformity of the light emitting device 10 and avoiding the occurrence of uneven luminance.
In some embodiments, the light guide structure 130 emits light having a wavelength similar to the light emitted by the light emitting element, with a wavelength difference of less than or equal to 10 nanometers.
The light guide structure 130 is made of a material having a refractive index of 1.1 to 3, for example, a material having a refractive index of 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, or 3.0. In some embodiments, light guide structure 130 is made of a material having a refractive index of 1.5 to 3. In some embodiments, light directing structure 130 is made of a material having a refractive index greater than 1.5 and less than or equal to 3. In some embodiments, the light guide structure 130 has a visible light transmittance greater than the visible light reflectance of the light guide structure 130.
In some embodiments, the material from which light directing structure 130 is made is a translucent material. In some embodiments, the material of which the light guide structure 130 is made includes silicon gel (silicone), polymethyl methacrylate (PMMA), epoxy, glass, quartz, inorganic particles, or a combination thereof. In some embodiments, the inorganic particles are selected from the group consisting of alumina, barium sulfate, magnesia, zirconia, and silica.
As shown in fig. 1, the light guide structure 130 is in a grid shape, and separates the light emitting elements 120 and continuously surrounds the light emitting elements 120. The light guide structure 130 and the light emitting element 120 are separated from each other and do not contact each other. In some embodiments, the light guide structure 130 includes a plurality of light guide units 130a, and each light guide unit 130a continuously surrounds one of the light emitting elements 120. In some embodiments, as shown in fig. 1, the light guide unit 130a has a square shape, but in other embodiments, the light guide unit 130a may have other shapes, such as a polygonal shape (e.g., a quadrilateral shape, a pentagonal shape, a hexagonal shape, etc.), a circular shape, an oval shape, etc., as long as the light guide unit 130 can continuously surround the light emitting element 120.
In some embodiments, as shown in fig. 2, the light emitting device 10 further includes a diffusion structure 140 disposed on the light emitting element 120, the light guide structure 130 and the substrate 110. In some embodiments, the diffusion structure 140 contacts the top end of the light guide structure 130. In some embodiments, the diffusion structure 140 includes one or more diffusion plates and one or more diffusion sheets stacked on each other to help improve the brightness uniformity of the light emitting device.
In some embodiments, as shown in fig. 2, the width W1 of the light guide structure 130 between two adjacent ones of the light emitting elements 120 is greater than the distance D1 between the light guide structure 130 and one of the two adjacent light emitting elements 120. In some embodiments, the ratio of the width W1 to the distance D1 is greater than or equal to 3, or even greater than or equal to 4 or greater than or equal to 5.
In some embodiments, as shown in fig. 2, the height H1 of the light guide structure 130 is greater than the height H2 of the light emitting elements 120. In some embodiments, the ratio of height H1 to height H2 is greater than or equal to 1.5, or even greater than or equal to 2 or greater than or equal to 3.
In some embodiments, as shown in fig. 2, the optical distance OD of the light emitting device 10 is the same as the height H1 of the light guide structure 130. In some embodiments, the optical distance OD is between 0.3 mm and 3 mm, such as 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, or 2 mm.
Fig. 3 is a cross-sectional schematic view of a light emitting device according to some embodiments of the invention. The difference between fig. 3 and fig. 2 is that the light emitting device 10 of fig. 3 further includes an encapsulant 150, the encapsulant 150 is filled between the light guiding structure 130 and the light emitting element 120, and the encapsulant 150 is made of another material with a refractive index greater than or equal to 1.1 and less than 1.6, for example, a material with a refractive index of 1.1, 1.2, 1.3, 1.4, 1.5, or 1.55. As shown in fig. 3, light emitted from the light emitting element 120 passes through the encapsulant 150 and then refracts into the light guiding structure 130, so that the light guiding structure 130 emits light.
Fig. 4 is a photographic image of a light-emitting device including a light-emitting element and a light-guiding structure, in which the light-emitting element does not emit light, according to an embodiment of the present invention. As shown in fig. 4, the light guiding structure itself does not emit light.
Fig. 5 is a photographed image of the light-emitting device of fig. 4 when the light-emitting element emits light. As shown in fig. 5, when the light emitting element emits light, the light enters the light guide structure, and the light guide structure emits light.
Fig. 6 is a photographic image of a light-emitting device including a light-emitting element, a light-guiding structure, and a diffusion structure when the light-emitting element emits light according to an embodiment of the present invention. The light emitting device of fig. 6, i.e., the light emitting device of fig. 4, is provided with a diffusion structure. As shown in fig. 6, the light emitting region of the light emitting device has no significant brightness non-uniformity and has good brightness uniformity.
Fig. 7 is a photographic image of a light-emitting device including a light-emitting element, a light-guiding structure, a diffusion structure, and a quantum dot film (QD film) when the light-emitting element emits light according to an embodiment of the present invention. The light emitting device of fig. 7, that is, the light emitting device of fig. 6, is provided with a quantum dot film. As shown in fig. 7, the light emitting region of the light emitting device has no significant brightness non-uniformity and has good brightness uniformity.
Fig. 8 is a Charge Coupled Device (CCD) luminance/chrominance image of the light-emitting device of fig. 7 when the light-emitting element emits light. As shown in fig. 8, the light emitting region of the light emitting device has no significant brightness non-uniformity and has good brightness uniformity.
The following examples are presented to illustrate certain aspects of the present invention and to enable those of ordinary skill in the art to practice the invention. However, the following examples are not intended to limit the present invention.
The light-emitting devices of comparative examples 1 to 6 included a plurality of light-emitting elements and diffusion structures, but did not include a light-guiding structure; the light emitting devices of experimental examples 1 to 3 include a plurality of light emitting elements, a light guide structure, and a diffusion structure.
The pitches of the light emitting elements, the types of the diffusion structures used, the existence of the light guide structure, and the brightness uniformity of the light emitting device obtained after the test are shown in comparative examples 1 to 6 and experimental examples 1 to 3. It is noted that the thickness of the diffusion structure 1 is 400 to 500 micrometers more than the thickness of the diffusion structure 2. The thickness of the diffusion structure 2 is 400 to 500 micrometers more than the thickness of the diffusion structure 3 and the thickness of the diffusion structure 4.
Watch 1
When the distance between the light-emitting elements is smaller, the total number of the used light-emitting elements is larger; when the pitch of the light emitting elements is larger, the total number of the light emitting elements used is smaller. In comparative examples 1 to 6 and experimental examples 1 to 3, the total number of light emitting elements having a light emitting element pitch of 5 micrometers was about 36% less than that having a light emitting element pitch of 4 micrometers.
Referring to table one, the luminance uniformity of the light emitting devices of comparative examples 2 to 6 having the thinner diffusion structure 2, 3 or 4 and having the less light emitting elements (the light emitting element pitch is 5 μm) was significantly reduced by about 4 to 7% compared to comparative example 1 having the thicker diffusion structure 1 and having the more light emitting elements (the light emitting element pitch is 4 μm) in total.
Referring to table one, however, compared to comparative example 1, the light emitting devices of experimental examples 1 to 3 having thinner diffusion structures 2, 3 or 4 and having a smaller total number of light emitting elements (the pitch of the light emitting elements is 5 μm) have no significant decrease in the brightness uniformity of the light emitting devices due to the special light guide structure of the present invention. Therefore, the light guide structure of the invention can ensure that the light-emitting device still has good brightness uniformity under the condition of greatly reducing the number of the light-emitting diodes and adopting a thinner diffusion structure, so the light guide structure of the invention can obviously reduce the material and the manufacturing cost of the light-emitting device.
Although embodiments of the present invention have been described in considerable detail, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
It will be apparent to those skilled in the art that various modifications and variations can be made in the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they come within the scope of the appended claims.
Claims (10)
1. A light-emitting device, comprising:
a substrate;
a plurality of light emitting elements disposed on the substrate; and
the light guide structure is arranged on the substrate, separates the plurality of light-emitting elements and continuously surrounds the plurality of light-emitting elements, is separated from the plurality of light-emitting elements, and can emit light by entering light energy emitted by the plurality of light-emitting elements into the light guide structure, wherein the light guide structure is made of a material with the refractive index of 1.1-3.
2. The light-emitting device of claim 1, wherein the material comprises silicone, polymethyl methacrylate (PMMA), epoxy resin, glass, quartz, inorganic particles, or a combination thereof.
3. The light-emitting device according to claim 2, wherein the inorganic particles are selected from the group consisting of aluminum oxide, barium sulfate, magnesium oxide, zirconium oxide, and silicon oxide.
4. The light-emitting device according to claim 1, further comprising a diffusion structure disposed on the light-emitting elements, the light-guiding structure and the substrate, the diffusion structure contacting the light-guiding structure.
5. The apparatus of claim 1, wherein a width of the light guide structure between two adjacent light-emitting elements is greater than a distance between the light guide structure and one of the two adjacent light-emitting elements.
6. The device of claim 5, wherein the ratio of the width to the distance is greater than or equal to 3.
7. The light-emitting device according to claim 1, further comprising an encapsulant filled between the light guide structure and the light-emitting elements, wherein the encapsulant is made of another material having a refractive index greater than or equal to 1.1 and less than 1.6.
8. The light-emitting device according to claim 1, wherein the light-guiding structure comprises a plurality of light-guiding units, each of the light-guiding units continuously surrounding one of the light-emitting elements.
9. The light-emitting device according to claim 1, wherein the light-guiding structure has a visible light transmittance greater than a visible light reflectance of the light-guiding structure.
10. A light device as claimed in claim 1, characterized in that the material is a translucent material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011137860.1A CN114388680A (en) | 2020-10-22 | 2020-10-22 | Light emitting device |
| KR1020210131467A KR102603190B1 (en) | 2020-10-22 | 2021-10-05 | Light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011137860.1A CN114388680A (en) | 2020-10-22 | 2020-10-22 | Light emitting device |
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| Publication Number | Publication Date |
|---|---|
| CN114388680A true CN114388680A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011137860.1A Pending CN114388680A (en) | 2020-10-22 | 2020-10-22 | Light emitting device |
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| KR (1) | KR102603190B1 (en) |
| CN (1) | CN114388680A (en) |
Family Cites Families (3)
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|---|---|---|---|---|
| KR20180062573A (en) * | 2016-11-30 | 2018-06-11 | 엘지디스플레이 주식회사 | Direct light type backlight unit and display device having the same |
| JP2019023981A (en) * | 2017-07-24 | 2019-02-14 | キヤノン株式会社 | Light source device and image display device |
| KR20190075695A (en) * | 2017-12-21 | 2019-07-01 | 엘지디스플레이 주식회사 | Backlight unit and display device having the same |
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- 2020-10-22 CN CN202011137860.1A patent/CN114388680A/en active Pending
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| KR20220053471A (en) | 2022-04-29 |
| KR102603190B1 (en) | 2023-11-17 |
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