CN214848618U - RGB light source device with high photochromic performance and display screen - Google Patents
RGB light source device with high photochromic performance and display screen Download PDFInfo
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- CN214848618U CN214848618U CN202120531847.8U CN202120531847U CN214848618U CN 214848618 U CN214848618 U CN 214848618U CN 202120531847 U CN202120531847 U CN 202120531847U CN 214848618 U CN214848618 U CN 214848618U
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Abstract
The utility model discloses a RGB light source device with high photochromic performance and preparation method, display screen thereof, wherein the device includes: a substrate; at least one light emitting unit disposed on the substrate, the light emitting unit including at least one red light chip, at least one blue light chip, and at least one green light chip; and the packaging layer comprises a scattering packaging adhesive layer and an extinction packaging adhesive layer, the scattering packaging adhesive layer is used for sealing and packaging the light-emitting unit, the first surface of the extinction packaging adhesive layer is connected with the scattering packaging adhesive layer, and the second surface of the extinction packaging adhesive layer is provided with a plurality of microstructures. The utility model discloses a scattering encapsulation glue film makes ruddiness, blue light, green glow among the RGB light source device more even, eliminates the influence of most external environment light through extinction encapsulation glue film, improves the environmental contrast of device, in addition, effectively reduces the reflectivity of wide-angle incident light through the microstructure, improves the environmental contrast of RGB light source device under the wide-angle, but wide application in LED technical field.
Description
Technical Field
The utility model relates to a LED technical field especially relates to a RGB light source device and display screen with high photochromic performance.
Background
The RGB light source, as a full-color display device with energy saving, environmental protection, low power consumption and long service life, has replaced the traditional display mode and is one of the commonly used display devices in life. With the further popularization of RGB light source devices, higher requirements are placed on the display performance of the devices. At present, three problems exist in an RGB light source device, firstly, the contrast of the environment is too low to meet the requirement of outdoor display. Secondly, the red light, the blue light and the green light of the RGB light source device are not mixed uniformly, and the display quality of the device is not high due to the lower uniformity. Thirdly, in practical use, due to the fresnel reflection, the reflectivity of the RGB light source device is too high under the premise of large-angle incident light, which affects normal use. The existing RGB light source device packaging structure only can solve one of uniformity, environmental contrast or large-angle reflection, and lacks an RGB light source device which can simultaneously improve the uniformity and the environmental contrast and inhibit the large-angle reflection.
SUMMERY OF THE UTILITY MODEL
In order to solve one of the above technical problems, the present invention provides an RGB light source device and a display screen with high light color performance.
The utility model adopts the technical proposal that:
an RGB light source device with high photochromic performance comprising:
a substrate;
at least one light emitting unit disposed on the substrate, the light emitting unit including at least one red light chip, at least one blue light chip, and at least one green light chip;
the packaging layer comprises a scattering packaging adhesive layer and an extinction packaging adhesive layer, the scattering packaging adhesive layer is used for sealing and packaging the light-emitting units, the first surface of the extinction packaging adhesive layer is connected with the scattering packaging adhesive layer, and the second surface of the extinction packaging adhesive layer is provided with a plurality of microstructures;
the light emitted by the light-emitting unit sequentially passes through the scattering packaging adhesive layer, the extinction packaging adhesive layer and the microstructures.
Further, the substrate forms a cavity, and the light emitting unit is arranged in the cavity;
the light-emitting unit and the substrate are electrically connected through a conductive metal wire.
Further, the scattering packaging adhesive layer comprises packaging colloid and scattering particles, the scattering particles are nano particles with scattering characteristics, the packaging colloid is colloid with water and oxygen resisting capacity, and the scattering particles are dispersed on the packaging colloid.
Further, the extinction packaging adhesive layer comprises packaging colloid and magnetic extinction particles, the magnetic extinction particles are nanoparticles with extinction characteristics and magnetism, the packaging colloid is colloid with water and oxygen resisting capacity, and the magnetic extinction particles are dispersed on the packaging colloid.
Further, the microstructure is in a conical structure, and the bottom surface of the conical structure is connected with the second surface of the extinction packaging adhesive layer;
the microstructures are uniformly distributed on the second surface of the extinction packaging adhesive layer.
Further, the thickness of the scattering packaging adhesive layer is 0.05-20 times of that of the extinction packaging adhesive layer.
Further, the chip may be mounted on the substrate in any one of a flip-chip structure, a vertical structure, or a flip-chip structure.
The utility model discloses another technical scheme who adopts is:
a display screen is made of the RGB light source device with high photochromic performance.
The utility model has the advantages that: the utility model discloses a scattering encapsulation glue film makes ruddiness, blue light, green glow among the RGB light source device more even, eliminates the influence of most external environment light through extinction encapsulation glue film, improves the environmental contrast of device, in addition, effectively reduces the reflectivity of wide-angle incident light through the microstructure, improves the environmental contrast of RGB light source device under the wide-angle.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a cross-sectional view of an RGB light source device with high photochromic performance in embodiment 1 of the present invention;
fig. 2 is a cross-sectional view of an RGB light source device with high photochromic performance in embodiment 2 of the present invention;
FIG. 3 is a cross-sectional view of a device in a die bonding process according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a device in an embodiment of the present invention during dispensing;
fig. 5 is a cross-sectional view of a magnetically operated cure process device in an embodiment of the invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, the present embodiment provides an RGB light source device with high light color performance, including:
a substrate 1;
at least one light emitting unit 2 disposed on the substrate, the light emitting unit including at least one red chip 201, at least one blue chip 202, and at least one green chip 203;
the packaging layer 3 comprises a scattering packaging adhesive layer 301 and an extinction packaging adhesive layer 302, the scattering packaging adhesive layer is used for sealing and packaging the light-emitting units, the first surface of the extinction packaging adhesive layer is connected with the scattering packaging adhesive layer, and a plurality of microstructures 303 are uniformly distributed on the second surface of the extinction packaging adhesive layer;
the light emitted by the light emitting unit 2 sequentially passes through the scattering packaging adhesive layer 301, the extinction packaging adhesive layer 302 and the microstructures 303.
The scattering packaging adhesive layer has a scattering effect on light emitted by the chip, and the color uniformity of the RGB light source device can be improved. The extinction packaging adhesive layer can absorb most of external light, and the environmental contrast of the RGB light source device can be improved. The micro structure on the extinction packaging adhesive layer can effectively reduce the reflectivity of large-angle incident light and improve the environmental contrast of the RGB light source device under large angles.
Further as an optional embodiment, each light emitting unit comprises at least three LED chips, including at least one red chip, one green chip and one blue chip. The chip may be in a flip, vertical, or flip-chip configuration.
Further as an optional implementation manner, the scattering encapsulant layer includes encapsulant and scattering particles, the scattering particles are nanoparticles with scattering characteristics, and the encapsulant is transparent colloid with water and oxygen barrier capability. The scattering particles are uniformly dispersed in the encapsulant.
Further as an optional implementation manner, the extinction packaging adhesive layer includes packaging colloid and magnetic extinction particles, the magnetic extinction particles are nanoparticles with extinction characteristics and magnetism, and the packaging colloid is transparent and has a water and oxygen resisting capability. The magnetic extinction particles are uniformly dispersed in the packaging colloid.
Further as an alternative embodiment, the ratio of the thickness of the scattering encapsulation glue layer to the thickness of the matting encapsulation glue layer is between 0.05 and 20.
Example 1
As shown in fig. 1, the present embodiment provides an RGB light source device with high light color performance, which includes a substrate 1, a light emitting unit 2, and an encapsulation layer 3.
Wherein the light emitting unit is composed of a red chip 201, a blue chip 202 and a green chip 203. The light emitting unit 2 and the substrate 1 are electrically connected by gold wires.
The packaging layer 3 comprises a lower scattering packaging adhesive layer 301, an upper extinction packaging adhesive layer 302 and a microstructure 303 on the surface of the extinction packaging adhesive layer.
The scattering encapsulant layer 301 is a mixture of Polydimethylsiloxane (PDMS) and scattering particles, wherein the scattering particles are silica nanoparticles with a particle size of 100-300 nm. The extinction packaging adhesive layer 302 is a mixture of PDMS and magnetic extinction particles, wherein the magnetic extinction particles are ferroferric oxide nanoparticles with the particle size of 30-50 nm.
Example 2
As shown in fig. 2, the present embodiment provides an RGB light source device with high light color performance, which includes a substrate 1, a light emitting unit 2, and an encapsulation layer 3.
Wherein the light emitting unit is composed of two red chips 201, one blue chip 202, and one green chip 203. The light emitting unit 2 and the substrate 1 are electrically connected by gold wires.
The packaging layer 3 comprises a lower scattering packaging adhesive layer 301, an upper extinction packaging adhesive layer 302 and a microstructure 303 on the surface of the extinction packaging adhesive layer.
The scattering encapsulating adhesive layer 301 is a mixture of PDMS and scattering particles, wherein the scattering particles are silica nanoparticles with a particle size of 100-300 nm. The scattering particles were mixed with PDMS by centrifugal stirring. The extinction packaging adhesive layer 302 is a mixture of PDMS and magnetic extinction particles, wherein the magnetic extinction particles are ferroferric oxide nanoparticles with the particle size of 30-50 nm. And the surface of the extinction packaging adhesive layer is provided with a microstructure.
The embodiment also provides a display screen, which is made of the RGB light source device with high photochromic performance.
The embodiment also provides a preparation method of the RGB light source device with high photochromic performance, which includes the following steps:
and S1, adding the scattering particles and the magnetic extinction particles into the colloid to prepare the packaging colloid.
Preparing a packaging layer: adding scattering particles, magnetic extinction particles and packaging colloid into a container according to the required concentration, and uniformly dispersing the scattering particles and the magnetic extinction particles in the packaging colloid in a centrifugation mode, a stirring mode and the like. And then carrying out vacuum defoaming treatment on the mixture to obtain the packaging layer.
And S2, fixing the light-emitting unit on the substrate, and injecting the packaging colloid.
And (3) crystal solidification: the light-emitting unit is fixed on the substrate through one or more processes such as die bonding, bonding and the like, and the light-emitting unit is electrically connected with the substrate through bonding, gold wire connection and the like. Dispensing: and adding the packaging adhesive layer to the device after die bonding in a manual dispensing mode, an automatic dispensing mode and the like.
And S3, curing the packaging colloid in a magnetic field to enable the magnetic extinction particles to move to a preset position to form an extinction packaging adhesive layer.
And S4, remaining scattering particles are left at the lower part of the packaging colloid to form a scattering packaging adhesive layer.
Magnetic control curing: and placing the device subjected to the glue dispensing in a magnetic field and carrying out curing treatment. Under the action of a magnetic field, the magnetic extinction particles move to the upper part of the packaging layer to form the extinction packaging adhesive layer, and the rest scattering particles remain on the lower part of the packaging layer to form the scattering packaging adhesive layer.
And S5, manufacturing a microstructure on the surface of the extinction packaging adhesive layer.
Further as an optional embodiment, in the magnetic manipulation curing, the heating curing time is 1-180 minutes, the heating temperature is 50-200 ℃, and the magnetic field intensity is 0.02-5T.
Further as an optional embodiment, in the magnetic manipulation curing, the applied magnetic field is one or more of a constant magnetic field, an alternating magnetic field, a pulsating magnetic field, a pulsed magnetic field, a uniform magnetic field, and a non-uniform magnetic field.
Example 3
The embodiment provides a preparation method of an RGB light source device with high photochromic performance, which includes the following steps:
preparing packaging glue: as powder of scattering particles: magnetic matte particle powder: and adding silicon dioxide nano particle powder, ferroferric oxide nano particle powder and PDMS into the container according to the proportion of 0.05:0.5:1, centrifuging to uniformly disperse the silicon dioxide nano particles and the ferroferric oxide nano particles into the PDMS, and then performing vacuum defoaming treatment on the mixture to obtain the scattering packaging adhesive layer.
And (3) crystal solidification: as shown in fig. 3, the light emitting unit is fixed on the substrate by one or more processes such as die bonding, and the light emitting unit is electrically connected to the substrate by bonding, gold wire connection, and the like.
Dispensing: as shown in fig. 4, a packaging adhesive layer is added to the die-bonded device by manual dispensing.
Magnetic control curing: as shown in fig. 5, the dispensed device is placed in a parallel magnetic field with a magnetic field strength of 0.5T and is cured. The curing temperature was 60 ℃ and the curing time was 60 minutes. Under the action of a magnetic field, the magnetic extinction particles move to the upper part of the packaging layer to form the extinction packaging adhesive layer, and the rest scattering particles remain on the lower part of the packaging layer to form the scattering packaging adhesive layer.
Through the above steps, the RGB light source device shown in fig. 1 can be obtained.
In summary, compared with the prior art, the present embodiment has the following advantages and beneficial effects:
(1) in the embodiment, red light, blue light and green light in the RGB light source device are uniformly mixed by scattering particles in the packaging adhesive layer. Moreover, the influence of most external ambient light can be eliminated by extinction ions in the extinction packaging adhesive layer, and the environmental contrast of the device is improved.
(2) The device of the embodiment has the advantages of simple structure, simple preparation process and easy performance improvement at low cost.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (8)
1. An RGB light source device having high photochromic performance, comprising:
a substrate;
at least one light emitting unit disposed on the substrate, the light emitting unit including at least one red light chip, at least one blue light chip, and at least one green light chip;
the packaging layer comprises a scattering packaging adhesive layer and an extinction packaging adhesive layer, the scattering packaging adhesive layer is used for sealing and packaging the light-emitting units, the first surface of the extinction packaging adhesive layer is connected with the scattering packaging adhesive layer, and the second surface of the extinction packaging adhesive layer is provided with a plurality of microstructures;
the light emitted by the light-emitting unit sequentially passes through the scattering packaging adhesive layer, the extinction packaging adhesive layer and the microstructures.
2. The RGB light source device with high photochromic performance of claim 1, wherein the substrate forms a cavity, the light emitting unit is disposed in the cavity;
the light-emitting unit and the substrate are electrically connected through a conductive metal wire.
3. The RGB light source device of claim 1, wherein the scattering encapsulant layer comprises encapsulant and scattering particles, the scattering particles are nanoparticles with scattering properties, the encapsulant is a colloid with water and oxygen barrier properties, and the scattering particles are dispersed on the encapsulant.
4. The RGB light source device of claim 1, wherein the matte packaging adhesive layer comprises packaging colloid and magnetic matte particles, the magnetic matte particles are nanoparticles with matte properties and magnetism, the packaging colloid is colloid with water and oxygen barrier ability, and the magnetic matte particles are dispersed on the packaging colloid.
5. The RGB light source device with high photochromic performance of claim 1, wherein the microstructure is a cone-shaped structure, and a bottom surface of the cone-shaped structure is connected to the second surface of the matte packaging adhesive layer;
the microstructures are uniformly distributed on the second surface of the extinction packaging adhesive layer.
6. The RGB light source device with high photochromic performance of claim 1, wherein the thickness of the scattering encapsulating adhesive layer is 0.05-20 times the thickness of the matting encapsulating adhesive layer.
7. The RGB light source device with high photochromic performance of claim 1, wherein the chip can be mounted on the substrate by any one of flip-chip, vertical or flip-chip configuration.
8. A display screen, characterized in that it is made of an RGB light source device with high photochromic performance as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120531847.8U CN214848618U (en) | 2021-03-12 | 2021-03-12 | RGB light source device with high photochromic performance and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120531847.8U CN214848618U (en) | 2021-03-12 | 2021-03-12 | RGB light source device with high photochromic performance and display screen |
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| Publication Number | Publication Date |
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| CN214848618U true CN214848618U (en) | 2021-11-23 |
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| CN202120531847.8U Active CN214848618U (en) | 2021-03-12 | 2021-03-12 | RGB light source device with high photochromic performance and display screen |
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- 2021-03-12 CN CN202120531847.8U patent/CN214848618U/en active Active
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