CN113176687A - LED light source and preparation method thereof, hot-pressing steel mesh and backlight module - Google Patents
LED light source and preparation method thereof, hot-pressing steel mesh and backlight module Download PDFInfo
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- CN113176687A CN113176687A CN202110449651.9A CN202110449651A CN113176687A CN 113176687 A CN113176687 A CN 113176687A CN 202110449651 A CN202110449651 A CN 202110449651A CN 113176687 A CN113176687 A CN 113176687A
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
Abstract
The invention relates to an LED light source and a preparation method thereof, a hot-pressing steel mesh and a backlight module, belonging to the technical field of display. Compared with the prior art, the LED light source has the advantages that the light emitting angle of the LED light source can be increased, so that the overall brightness of the LED light source is more uniform; the use amount of LED light sources in the backlight module is saved, the light mixing distance is reduced, and the display screen is thinned; the heat dissipation efficiency can be improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of display, in particular to an LED light source and a preparation method thereof, a hot-pressing steel mesh and a backlight module.
Background
The mini LCD in the popular backlight display industry generally has the following structure: backplate + bar PCB + LED light source + diffuser plate + other optical diaphragm. The mini LCD has the characteristics of small OD distance (the OD distance refers to the distance from the LED light source to the diffusion plate, namely the light mixing distance), high contrast ratio and display of Local dimming (the Local dimming refers to backlight Local dimming so as to adjust the brightness of a certain area and form bright-dark contrast).
The CSP scheme of the prior art is: a plurality of CSP lamp beads/LED light sources are arrayed on the lamp panel/lamp strip (the bead spacing/light source spacing in the prior art is 5 mm-10 mm). Because the light source interval is too small, and the luminous angle of the LED light source is small (the luminous angle is about 120 degrees), the LED light source, especially above the central position of the LED light source, is particularly bright, and the junction between the LED light source and the LED light source is dark, so that the whole lamp panel has the phenomena of uneven brightness and inconsistent light spots.
In the prior art, in order to reduce the brightness of the LED light source at the center, the problem that the junction between the LED light source and the LED light source is dark and the whole lamp panel has uneven brightness and inconsistent light spots is solved by applying a diffusion layer on the LED light source in the prior art, so as to diffuse the point light source into a relatively uniform surface light source, and further make the surface light source of the whole lamp panel uniform, as shown in fig. 1.
However, in the above technical scheme, after the diffusion layer is coated on the upper end of the colloid of the LED light source, the heat dissipation effect of the LED light source is reduced, and the overall brightness of the backlight module is reduced by about 30% -40%, and at this time, the backlight brightness requirement needs to be met by adding the optical film, so that the manufacturing cost of the backlight module is increased; in addition, the LED light sources are easy to have uneven coating in the process of moving the diffusion layer, so that the brightness of the LED light sources is different, and the backlight module at the end of the whole machine has the bad phenomenon of uneven brightness; finally, the diffusion layer and the colloid on the LED light source are formed in a molding mode, and if the control of the manufacturing process is not in place, the diffusion layer and the colloid are easily peeled off, so that the brightness of the lamp beads on the whole lamp panel is uneven.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, an object of the present invention is to provide an LED light source with an increased light emitting angle and more uniform brightness, a method for manufacturing the LED light source, a hot-pressed steel mesh, and a backlight module.
The technical scheme for solving the technical problems is as follows: the utility model provides a LED light source, includes support, luminous chip and colloid, luminous chip is fixed to be arranged in on the support, luminous chip with support electric connection, the colloid is fixed to be arranged in on the support, luminous chip package is in the colloid, the top of colloid is provided with the diffusion barrier who comprises a plurality of diffusion points, diffusion barrier is right the light that luminous chip sent carries out the scattering.
The invention has the beneficial effects that: the light emitting angle of the LED light source can be increased, and the brightness of the center position of the LED light source is reduced, so that the overall brightness of the LED light source is more uniform; the distance between two adjacent LED light sources in the backlight module is increased, the using amount of the LED light sources is saved, the light mixing distance can be reduced, the display screen is thinned, the use of optical films is reduced, and the weight of the display screen is reduced; the heat dissipation area of the surface of the LED light source can be increased, and the service life of the LED light source is prolonged.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the density of diffusion points in the diffusion structure gradually decreases from the center of the top of the colloid to the edge thereof.
The beneficial effect of adopting the further scheme is that: the light diffusion effect is improved, and the overall brightness of the LED light source is more uniform.
Further, the density of the diffusion points in the diffusion structure is gradually reduced from the light emitting center of the light emitting chip to the light emitting edge.
The beneficial effect of adopting the further scheme is that: the light diffusion effect is improved, and the overall brightness of the LED light source is more uniform.
Furthermore, the diffusion point comprises a groove and a bulge positioned at the edge of the groove, the groove collects light emitted by the light emitting chip to the bulge, and the bulge scatters the light passing through the groove.
The beneficial effect of adopting the further scheme is that: the light diffusion effect in the unit area is better, and the brightness of the LED light source is more uniform.
Further, the support is a substrate, and the colloid is fixedly arranged at the upper end of the substrate and encapsulates the light-emitting chip in the colloid.
In order to solve the technical problem, the invention also provides a preparation method of the LED light source, which comprises the following steps:
fixing a light-emitting chip on a whole support in a die bonding manner, and electrically connecting the light-emitting chip with the support;
molding a colloid on the support, and encapsulating the light-emitting chip in the colloid;
hot pressing a diffusion structure consisting of a plurality of diffusion points on the top of the colloid by adopting a special hot-pressing steel mesh;
and cutting the hot-pressed whole support into single LED light sources.
The invention has the beneficial effects that: the LED light source is simple in production process, the production cost of the LED light source can be effectively reduced, the light emitting angle of the LED light source can be increased, the overall brightness of the LED light source is more uniform, and the service life of the LED light source is prolonged.
Further, the density of the diffusion points in the diffusion structure gradually decreases from the center of the top of the colloid to the edge thereof, or the density of the diffusion points in the diffusion structure gradually decreases from the light-emitting center of the light-emitting chip to the light-emitting edge thereof.
The invention has the beneficial effects that: the light diffusion effect is improved, and the overall brightness of the LED light source is more uniform.
In order to solve the technical problem, the invention also provides a hot-pressing steel mesh which comprises a hot-pressing steel mesh body, wherein a plurality of irregularly arranged mesh points are arranged on the hot-pressing steel mesh body, and the mesh points correspond to a plurality of diffusion points on the top of the colloid which is hot-pressed on the whole support one by one.
The invention has the beneficial effects that: simple structure and convenient production.
In order to solve the technical problem, the invention also provides a backlight module which comprises a lamp panel, a back panel, a reflector plate, a diffusion plate, a diaphragm, a middle frame, glass and a face frame, wherein the lamp panel is attached with a plurality of LED light sources; the lamp panel is fixedly arranged at the bottom of the inner side of the backboard, the reflector plate is fixedly arranged in the backboard and above the lamp panel, the diffuser plate is fixedly arranged at the upper end of the reflector plate, the diaphragm is arranged at the upper end of the diffuser plate, the middle frame is arranged along the edge of the diaphragm, one end of the middle frame is fixedly connected with the upper end of the backboard, and the other end of the middle frame tightly presses the reflector plate, the diffuser plate and the diaphragm to be positioned in the backboard; the glass is fixedly arranged at the upper end of the middle frame, the glass is provided with a decorative strip along the edge of the glass, the decorative strip covers the middle frame, and the face frame covers the decorative strip and is fixedly connected with the back plate.
The invention has the beneficial effects that: the number of the LED light sources can be reduced, so that the cost and the power consumption can be reduced; the light mixing distance in the backlight module can be shortened, the backlight module is thinned, the use of optical films is reduced, and the whole display screen is light and thin.
Further, the diaphragm comprises a QD film, a first prism film, a second prism film and a reflection polarizer, and the QD film, the first prism film, the second prism film and the reflection polarizer are sequentially stacked.
Drawings
FIG. 1 is a schematic diagram of a prior art LED light source;
FIG. 2 is a schematic diagram of an LED light source according to the present invention;
FIG. 3 is a schematic diagram of the structure of the diffusion structure scattering light in the LED light source of the present invention;
FIG. 4 is a schematic view of the structure of the diffusion point scattering light in the LED light source of the present invention;
FIG. 5 is a schematic view of a lamp panel of the backlight module according to the present invention;
FIG. 6 is an exploded view of the backlight module according to the present invention;
FIG. 7 is a schematic structural diagram of a backlight module according to the present invention;
fig. 8 is an enlarged schematic view of fig. 7 at a.
In the drawings, the components represented by the respective reference numerals are listed below:
1. 1.1 parts of an LED light source, 1.1 parts of a bracket, 1.2 parts of a light-emitting chip, 1.3 parts of colloid, 1.4 parts of diffusion points, 1.5 parts of a diffusion layer;
1.4.1, grooves, 1.4.2 and bulges;
2. a back plate;
3. a reflective sheet;
4. a diffusion plate;
5. a membrane;
6. a middle frame;
7. glass;
8. a face frame;
9. decorating strips;
10. and a lamp panel.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 2 is a schematic structural diagram of an LED light source according to the present invention. The LED light source comprises a support 1.1, a light-emitting chip 1.2 and a colloid 1.3.
Specifically, luminescence chip 1.2 is fixed to be arranged in on the support 1.1, luminescence chip 1.2 with support 1.1 electric connection, colloid 1.3 is fixed to be arranged in on the support 1.1, luminescence chip 1.2 encapsulation is in the colloid 1.3, the top of colloid 1.3 is provided with the diffusion structure who comprises a plurality of diffusion point 1.4, the diffusion structure is right the light that luminescence chip 1.2 sent carries out the scattering.
In the practical application process, the light-emitting chip 1.2 can be fixedly arranged on the bonding pad of the bracket 1.1 through soldering so as to be electrically connected with the bonding pad of the bracket 1.1; the light emitting chip 1.2 can also be electrically connected with the bonding pad of the bracket 1.1 through a bonding wire, which is determined by the bracket structure and the backlight module.
In addition, the light emitting chip 1.2 may be one blue light emitting chip, may also be a plurality of blue light emitting chips, may also be a blue and green light emitting chip, may also be red, green, blue light emitting chip, specifically depending on the support structure and the backlight module needs.
In this embodiment, a plurality of diffusion points 1.4 are formed on the top of the colloid 1.3, and the light emitted from the light emitting chip 1.2 is diffused by using a diffusion structure formed by the plurality of diffusion points 1.4, so as to increase the light emitting angle of the LED light source and reduce the brightness of the center position of the LED light source, thereby making the overall brightness of the LED light source more uniform, as shown in fig. 3 in particular.
In this embodiment, because of the increase of the luminous angle of the LED light source, luminous angle can increase to 170 even, not only can increase the distance between two adjacent LED light sources on the lamp panel 10 among the backlight unit like this, save the usage of LED light source, can reduce backlight unit's mixed light distance moreover, make the display screen attenuate, can also reduce backlight unit in the use of optical diaphragm simultaneously, alleviate the weight of display screen, reach reduce cost, energy-conserving purpose.
In addition, increase the diffusion layer among the relative prior art scheme and can make the radiating effect can be worse, in this embodiment, through the top hot pressing diffusion structure at the colloid, not only reduced the diffusion layer like this, increased the heat radiating area on LED light source surface, reduced the risk that the LED light source became invalid because of high temperature, because of the diffusion structure is hot briquetting on the colloid moreover, improved the structural stability of diffusion structure, prolonged the life of LED light source.
In the above embodiment, the density of the diffusion points 1.4 in the diffusion structure gradually decreases from the center of the top of the colloid 1.3 to the edge thereof. In other words, a denser diffusion point 1.4 is built directly above the light emitting chip 1.2, and a progressively sparser diffusion point 1.4 is built around directly above the light emitting chip 1.2.
In the present embodiment, when the light emitting chip 1.2 is located at the center of the support 1.1, that is, at the lower end of the center of the colloid 1.3, the light emitted from the light emitting chip 1.2 is scattered from the colloid 1.3 to the diffusion structure. Because the density of the light emitted by the light emitting chip 1.2 at the center of the top of the colloid 1.3 is greater than the density of the edge of the top of the colloid 1.3, the light emitting brightness is concentrated at the center of the top of the colloid 1.3, the density of the diffusion point 1.4 is gradually reduced from the center of the top of the colloid 1.3 to the edge of the colloid by arranging the diffusion point 1.4 at the top of the colloid 1.3, namely, the density of the diffusion point 1.4 at the center of the top of the colloid 1.3 is increased, the light concentrated at the center of the top of the colloid 1.3 can be scattered by the high-density diffusion point 1.4, the light diffusion effect at the center of the LED light source is increased, and the overall brightness of the LED light source is more uniform.
In the above embodiment, the density of the diffusion points 1.4 in the diffusion structure gradually decreases from the light emitting center of the light emitting chip 1.2 to the light emitting edge.
In this embodiment, the density of the diffusion points 1.4 can be arranged on the top of the colloid 1.3 according to the light emitting angle of the light emitting chip 1.2, the density of the diffusion points 1.4 arranged at the light emitting center of the light emitting chip 1.2 is greater than the density of the diffusion points 1.4 at the light emitting edge, that is, the density of the diffusion points 1.4 matched with the light emitting center is formed according to the light emitting angle of the light emitting chip 1.2, so that concentrated light can be scattered by the high-density diffusion points 1.4, the light diffusion effect at the center of the LED light source is increased, and the overall brightness of the LED light source is more uniform.
Further, the diffusion point 1.4 includes a groove 1.4.1 and a protrusion 1.4.2 located at an edge of the groove 1.4.1, the groove 1.4.1 collects light emitted from the light emitting chip 1.2 to the protrusion 1.4.2, and the protrusion 1.4.2 scatters the light passing through the groove 1.4.1.
In this embodiment, the light that light-emitting chip 1.2 sent is through colloid 1.3 to recess 1.4.1 department, carries out spotlight to the light, refracts the light of gathering to protruding 1.4.2 department again, utilizes protruding 1.4.2 to carry out the scattering to the light of gathering, realizes that the light diffusion effect in the unit region is better, and the luminance of LED light source is more even.
In order to prepare the LED light source, the invention also provides a preparation method of the LED light source, which comprises the following steps:
s1, printing solder paste on the bracket 1.1, fixing the light-emitting chip 1.2 on a corresponding bonding pad of the whole bracket by soldering, and then performing reflow soldering to electrically connect the light-emitting chip 1.2 with the bracket 1.1.
And S2, pressing a layer of colloid 1.3 on the whole wafer support after die bonding through a Molding process so as to encapsulate the light-emitting chip 1.2 in the colloid 1.3.
S3, fixedly mounting a special hot-pressing steel mesh on the roller, driving the roller to rotate through a driving device, placing the whole piece support with the molded colloid 1.3 at the lower end of the roller, and controlling the whole piece support to move at a constant speed through the roller to utilize the special hot-pressing steel mesh to hot-press the diffusion structure consisting of a plurality of diffusion points 1.4 at the top of the colloid 1.3.
After the top of the colloid 1.3 is hot-pressed, a diffusion structure composed of a plurality of diffusion points 1.4 is formed on the top of the colloid 1.3, and the density of the diffusion points 1.4 in the diffusion structure is gradually reduced from the center of the top of the colloid 1.3 to the edge thereof, or the density of the diffusion points 1.4 in the diffusion structure is gradually reduced from the light-emitting center of the light-emitting chip 1.2 to the light-emitting edge.
Preferably, the hot-pressing steel mesh is used for hot-pressing the top of the colloid 1.3 for 5 seconds at the temperature of 100-130 ℃, so that a diffusion structure consisting of a plurality of diffusion points 1.4 can be hot-pressed on the top of the colloid 1.3.
In this embodiment, the hot-pressing steel mesh is formed with a plurality of irregularly arranged dots by a laser dotting method, and the dots on the hot-pressing steel mesh and the plurality of diffusion dots 1.4 on the top of the colloid 1.3 are arranged in a one-to-one correspondence manner.
And S4, cutting the hot-pressed whole support into one LED light source 1, and then performing light splitting, taping and packaging.
In the embodiment, the production process of the LED light source is simple, the surface hot-pressing process of the colloid 1.3 is more mature, the operation is easier, and the efficiency is higher, so that the production cost of the LED light source can be effectively reduced, the light-emitting angle of the LED light source can be increased, and the brightness of the center position of the LED light source is reduced, so that the overall brightness of the LED light source is more uniform; meanwhile, the diffusion structure is formed on the colloid in a hot-pressing mode, so that the structural stability of the diffusion structure is improved, the heat dissipation of the LED light source is accelerated, and the service life of the LED light source is prolonged.
In order to match the LED light source, the invention further provides a backlight module, as shown in fig. 6 to 8. The backlight module comprises a lamp panel 10, a back panel 2, a reflector plate 3, a diffuser plate 4, a diaphragm 5, a middle frame 6, glass 7 and a face frame 8, wherein the lamp panel is attached with a plurality of LED light sources 1. The lamp panel 10 is fixedly arranged at the bottom of the inner side of the back panel 2, the reflector plate 3 is fixedly arranged in the back panel 2 and is positioned above the lamp panel 10, the diffuser plate 4 is fixedly arranged at the upper end of the reflector plate 3, the diaphragm 5 is arranged at the upper end of the diffuser plate 4, the middle frame 6 is arranged along the edge of the diaphragm 5, one end of the middle frame 6 is fixedly connected with the upper end of the back panel 2, the other end of the middle frame 6 compresses the reflector plate 3, the diffuser plate 4 and the diaphragm 5, the glass 7 is fixedly arranged at the upper end of the middle frame 6, the glass 7 is provided with a decorative strip 9 along the edge, the decorative strip 9 covers the middle frame 6, the face frame 8 covers the decorative strip 9, and is fixedly connected with the back panel 2.
In this embodiment, as the light emitting angle of the LED light sources 1 is increased to 170 °, the distance between the plurality of LED light sources 1 arrayed on the upper end of the lamp panel 10 can be increased, that is, the light source distance is increased, so that the number of the LED light sources 1 used can be reduced, and then the cost and the power consumption can be reduced; meanwhile, the light emitting angle of the LED light source 1 is increased, so that the light mixing distance in the backlight module can be shortened, the backlight module is thinned, the use of optical films is reduced, the size and the weight of the backlight module can be reduced, and the whole display screen is light and thin.
In the above embodiment, the membrane 5 includes a QD film, a first prism film, a second prism film, and a reflective polarizer, and the QD film, the first prism film, the second prism film, and the reflective polarizer are sequentially stacked.
Example 2:
fig. 6 is a schematic structural diagram of a whole-piece holder 1.1 in a second embodiment of the LED light source of the present invention. The present embodiment is different from embodiment 1 in that: the support 1.1 is a substrate, and the light-emitting chip 1.2 can be electrically connected with a bonding pad on the substrate through solder paste or a bonding wire on the substrate; meanwhile, Molding the colloid 1.3 on the substrate after die bonding or die bonding and wire bonding by a Molding process, and packaging the light-emitting chip 1.2 in the colloid 1.3; then, a diffusion structure composed of a plurality of diffusion points 1.4 is hot pressed on the top of the colloid 1.3, and light emitted by the light emitting chip 1.2 is scattered by the diffusion structure.
In the present embodiment, the density of the diffusion points 1.4 in the diffusion structure gradually decreases from the center of the top of the colloid 1.3 to the edge thereof; or the density of the diffusion points 1.4 in the diffusion structure is gradually reduced from the light-emitting center of the light-emitting chip 1.2 to the light-emitting edge.
The LED light source in this embodiment can increase the light emitting angle of the LED light source, and reduce the brightness of the center position of the LED light source, so that the overall brightness of the LED light source is more uniform, and the light propagation path is as shown in embodiment 1, which is not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a LED light source, includes support, luminous chip and colloid, luminous chip is fixed to be arranged in on the support, luminous chip with support electric connection, the colloid is fixed to be arranged in on the support, luminous chip package is in the colloid, its characterized in that: the top of colloid is provided with the diffusion structure who constitutes by a plurality of diffusion points, diffusion structure is right the light that sends of emitting chip carries out the scattering.
2. The LED light source of claim 1, wherein: the density of diffusion points in the diffusion structure is gradually reduced from the center of the top of the colloid to the edge of the colloid.
3. The LED light source of claim 1, wherein: the density of the diffusion points in the diffusion structure is gradually reduced from the light-emitting center of the light-emitting chip to the light-emitting edge.
4. The LED light source of any of claims 1 to 3, wherein: the diffusion point comprises a groove and a bulge positioned at the edge of the groove, the groove collects light emitted by the light emitting chip to the bulge, and the bulge scatters the light passing through the groove.
5. The LED light source of claim 1, wherein: the support is a substrate, and the colloid is fixedly arranged at the upper end of the substrate and encapsulates the light-emitting chip in the colloid.
6. The method for preparing the LED light source according to claim 1, comprising the following steps:
fixing a light-emitting chip on a whole support in a die bonding manner, and electrically connecting the light-emitting chip with the support;
molding a colloid on the support, and encapsulating the light-emitting chip in the colloid;
hot pressing a diffusion structure consisting of a plurality of diffusion points on the top of the colloid by adopting a special hot-pressing steel mesh;
and cutting the hot-pressed whole support into single LED light sources.
7. The method for manufacturing an LED light source according to claim 6, wherein: the density of the diffusion points in the diffusion structure is gradually reduced from the center of the top of the colloid to the edge of the colloid, or the density of the diffusion points in the diffusion structure is gradually reduced from the light-emitting center of the light-emitting chip to the light-emitting edge of the light-emitting chip.
8. A steel net according to claim 6, wherein the steel net is characterized in that: the hot-pressing steel mesh comprises a hot-pressing steel mesh body, wherein a plurality of irregularly arranged mesh points are arranged on the hot-pressing steel mesh body, and the mesh points are in one-to-one correspondence with a plurality of diffusion points at the top of a colloid which is hot-pressed on the whole support.
9. Backlight unit, its characterized in that: the LED lamp comprises a lamp panel, a back panel, a reflector plate, a diffuser plate, a membrane, a middle frame, glass and a face frame, wherein the lamp panel is attached with a plurality of LED light sources according to any one of claims 1 to 5; the lamp panel is fixedly arranged at the bottom of the inner side of the backboard, the reflector plate is fixedly arranged in the backboard and above the lamp panel, the diffuser plate is fixedly arranged at the upper end of the reflector plate, the diaphragm is arranged at the upper end of the diffuser plate, the middle frame is arranged along the edge of the diaphragm, one end of the middle frame is fixedly connected with the upper end of the backboard, and the other end of the middle frame tightly presses the reflector plate, the diffuser plate and the diaphragm to be positioned in the backboard; the glass is fixedly arranged at the upper end of the middle frame, the glass is provided with a decorative strip along the edge of the glass, the decorative strip covers the middle frame, and the face frame covers the decorative strip and is fixedly connected with the back plate.
10. A backlight module according to claim 9, wherein: the diaphragm comprises a QD film, a first prism film, a second prism film and a reflection polaroid, wherein the QD film, the first prism film, the second prism film and the reflection polaroid are sequentially stacked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449651.9A CN113176687A (en) | 2021-04-25 | 2021-04-25 | LED light source and preparation method thereof, hot-pressing steel mesh and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449651.9A CN113176687A (en) | 2021-04-25 | 2021-04-25 | LED light source and preparation method thereof, hot-pressing steel mesh and backlight module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114924338A (en) * | 2022-06-13 | 2022-08-19 | 深圳市兆驰光元科技有限公司 | Diffusion barrier and backlight unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924338A (en) * | 2022-06-13 | 2022-08-19 | 深圳市兆驰光元科技有限公司 | Diffusion barrier and backlight unit |
| CN114924338B (en) * | 2022-06-13 | 2023-12-05 | 深圳市兆驰光元科技有限公司 | Diffusion barrier and backlight module |
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