CN109065530A - A kind of LED of six channel PLC technology - Google Patents
A kind of LED of six channel PLC technology Download PDFInfo
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- CN109065530A CN109065530A CN201811134877.4A CN201811134877A CN109065530A CN 109065530 A CN109065530 A CN 109065530A CN 201811134877 A CN201811134877 A CN 201811134877A CN 109065530 A CN109065530 A CN 109065530A
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- cupuliform
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- 238000005516 engineering process Methods 0.000 title claims abstract description 34
- 238000004020 luminiscence type Methods 0.000 claims abstract description 63
- 239000000084 colloidal system Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 101100493897 Arabidopsis thaliana BGLU30 gene Proteins 0.000 claims description 4
- 101100422614 Arabidopsis thaliana STR15 gene Proteins 0.000 claims description 4
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 claims description 4
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 claims description 4
- 101100141327 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RNR3 gene Proteins 0.000 claims description 4
- 101150112501 din1 gene Proteins 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 claims description 3
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000011324 bead Substances 0.000 description 12
- 238000005538 encapsulation Methods 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000003760 hair shine Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a kind of LED of six channel PLC technologies, including package carrier, six luminescence chips, first driving IC and the second driving IC, two cupuliforms are set in the package carrier, four pads are set in each cupuliform, each pad extends corresponding conductive pin, it is respectively set in two cupuliforms and is respectively equipped with the driving of the first driving IC and second IC, three luminescence chips are respectively provided in two cupuliforms, the first driving IC is separately connected pad and luminescence chip in cupuliform locating for the first driving IC, the second driving IC is separately connected pad and luminescence chip in cupuliform locating for the second driving IC, the multicoloured technical advantage in six channels optimizes finished product scheme, make that appearance is more beautiful convenient for Li Yong ﹑ between product Pai Bu ﹑ Kong, color is richer.
Description
Technical field
The invention belongs to LED to drive IC technical field, more particularly to a kind of LED of six channel PLC technologies.
Background technique
IC lamp bead built in routine be by a triple channel IC or four-way IC package at LED lamp bead, as shown in Fig. 2, being
The LED of existing triple channel PLC technology, Fig. 3 show the LED of existing four-way PLC technology, are based on the prior art single
Lamp bead can only control three or four LED luminescence chips, largely limit the rich of LED luminescent color, such as: in
In the patent that state's number of patent application is 201720027848.2, IC all-colour LED built in one kind 5050, including " 5050 are disclosed
Frame (10), 5050 bracket (10) are equipped with G patch (12), R patch (13), B patch (14) and IC chip (11), the G
Patch (12), R patch (13), B patch (14) are arranged in "-" type, and the R patch (13) is located at the G patch and B patch
(14) between " be by a triple channel IC package at LED, limit the rich of LED luminescent color.
Therefore, the emphasis how to solve the above problems as those skilled in the art's research.
Summary of the invention
It is an object of the invention to provide a kind of LED of six channel PLC technologies, can effectively solve above-mentioned LED lamp bead hair
The shortcoming of light dull coloring.
The purpose of the present invention is realized by following technical proposals:
A kind of LED of six channel PLC technology, including package carrier, six luminescence chips, the first driving IC and second
IC is driven, two cupuliforms is set in the package carrier, four pads is set in each cupuliform, each pad extends corresponding conduction
Pin respectively sets in two cupuliforms and is respectively equipped with the driving IC of the first driving IC and second, is respectively provided with three luminous cores in two cupuliforms
Piece, the first driving IC are separately connected pad and luminescence chip in cupuliform locating for the first driving IC, the second driving IC
The pad and luminescence chip being separately connected in cupuliform locating for the second driving IC.
Preferably, the conductive pin is located at the bottom of package carrier.
Preferably, six luminescence chips are that a kind of color or multiple color are arranged in pairs or groups.
Preferably, the first driving IC and the second driving IC are high quality external control single serial cascade constant current IC,
Onboard data shaping electricity ﹑ electrification reset and power-off reset electricity.
Preferably, filling packing colloid in the package carrier.
Preferably, the conductive pin is respectively power pins VDD1, VDD2, signal output pin DOUT1, DOUT2,
Signal input pin DIN1 ﹑ DIN2, grounding pin GND1 and GND2.
Compared with prior art, the beneficial effects of the present invention are:
Two triple channel driving IC are built in the different cup bodies of same LED lamp bead by the present invention simultaneously, pass through conductor wire
Material cleverly connects luminescence chip and driving IC, so that its LED for forming a complete six channel PLC technology, is saved
Carrier needed for single LED, simplifies manufacture craft, reduces number of devices, reduce production cost, and it is raw to improve product
Efficiency and yields are produced, improves the rich of LED lamp bead color, the simplification of LED structure, meanwhile, the multicoloured skill of multichannel
The excellent finished product scheme of art advantage, makes convenient for Li Yong ﹑ between product Pai Bu ﹑ Kong that appearance is more beautiful.
Detailed description of the invention
Fig. 1 is LED planar structure schematic diagram proposed by the present invention；
Fig. 2 is IC triple channel planar structure schematic diagram built in the prior art；
Fig. 3 is IC four-way planar structure schematic diagram built in the prior art；
Fig. 4 is LED schematic perspective view proposed by the present invention；
Fig. 5 is LED schematic perspective view proposed by the present invention；
Fig. 6 is LED application principle schematic diagram proposed by the present invention.
Description of symbols: 1- package carrier, the first cupuliform of 2-, the second cupuliform of 3-, 4- first drive IC, 5- second to drive
The first luminescence chip of IC, 6-, the second luminescence chip of 7-, 8- third luminescence chip, the 4th luminescence chip of 9-, the luminous core of 10- the 5th
Piece, the 6th luminescence chip of 11-, the first pad of 12-, the second pad of 13-, 14- third pad, the 4th pad of 15-, 16- the 5th are welded
Disk, the 6th pad of 17-, the 7th pad of 18-, the 8th pad of 19-, the first pin of 20-, 21- second pin, 22- third pin,
The 4th pin of 23-, the 5th pin of 24-, the 6th pin of 25-, the 7th pin of 26-, the 8th pin of 27-, the first signal path of 28-,
29- second signal channel.
Specific embodiment
The present invention is further illustrated with attached drawing combined with specific embodiments below.
Embodiment one
As shown in Figures 1 to 6, the LED of a kind of six channel PLC technology, including 1, six luminescence chip of package carrier and
Drive IC；Six luminescence chips are the first luminescence chip 6, the second luminescence chip 7, third luminescence chip 8, the 4th luminous core respectively
Piece 9, the 5th luminescence chip 10, the 6th luminescence chip 11, driving IC are the driving of the first driving IC4 and second IC 5 respectively；Encapsulation
Carrier is in bowl shape, inside sets two cupuliforms, is the first cupuliform 2 and the second cupuliform 3 respectively, is equipped with eight metal pads in cupuliform,
Each pad extends corresponding conductive pin, and each pin is located at package carrier bottom, and eight pads are the connection of the first pad 12 respectively
First pin 20, the second pad 13 connect second pin 21, and third pad 14 connects third pin 22, the 4th pad 15 connection the
Four pins 23, the 5th pad 16 connect the 5th pin 24, and the 6th pad 17 connects the 6th pin 25, the 7th pad 18 connection the 7th
Pin 26, the 8th pad 19 connect the 8th pin 27；Respectively set IC and three luminescence chip of a driving in two cupuliforms, first glass
Shape 2 is equipped with the first driving tri- luminescence chip of IC4 He mono- ﹑ bis- ﹑, and the second cupuliform 3 is equipped with the second driving IC5 He tri- ﹑ tetra- ﹑ five and sends out
Optical chip, six luminescence chips are respectively arranged on corresponding pad, and driving IC and each luminescence chip, each conduction of PLC technology are drawn
It is connected between foot by electric wire, control luminescence chip individually shines, luminous two-by-two or more shine simultaneously.Working principle
It is as follows: if Fig. 1 present invention is by being integrated in a package carrier for the driving IC of two PLC technologies and six luminescence chips
In bowl, the package carrier is set there are two eight pads of bowl cup ﹑ and eight conductive pins being attached thereto, and two bowls are respectively set
There are the driving IC and three luminescence chips of a PLC technology, Fa light Xin Pian ﹑ is driven by IC and pad phase by electric wire
Even, corresponding colloid is filled in two cupuliforms respectively, the encapsulating structure is protected, the encapsulation glue can be according to reality
Demand fills white light Jiao Ti ﹑ mist colloid or transparent colloid, is allowed to form two independent three-channel driving circuits, then lead to
The controller for crossing a dual signal output as shown in FIG. 6 controls the driving circuit, is allowed to form one complete six
The LED of channel PLC technology.
In the present embodiment, the multicoloured technical advantage in six channels optimizes finished product scheme, convenient for the space product Pai Bu ﹑ benefit
Yong ﹑ makes that appearance is more beautiful, color is richer.
Embodiment two
As shown in Figures 1 to 6, the LED of a kind of six channel PLC technology, including 1, six luminescence chip of package carrier and
Drive IC；Six luminescence chips are the first luminescence chip 6, the second luminescence chip 7, third luminescence chip 8, the 4th luminous core respectively
Piece 9, the 5th luminescence chip 10, the 6th luminescence chip 11, driving IC are the driving of the first driving IC4 and second IC 5 respectively；Encapsulation
Carrier is in bowl shape, inside sets two cupuliforms, is the first cupuliform 2 and the second cupuliform 3 respectively, is equipped with eight metal pads in cupuliform,
Each pad extends corresponding conductive pin, and each pin is located at package carrier bottom, and eight pads are the connection of the first pad 12 respectively
First pin 20, the second pad 13 connect second pin 21, and third pad 14 connects third pin 22, the 4th pad 15 connection the
Four pins 23, the 5th pad 16 connect the 5th pin 24, and the 6th pad 17 connects the 6th pin 25, the 7th pad 18 connection the 7th
Pin 26, the 8th pad 19 connect the 8th pin 27；Respectively set IC and three luminescence chip of a driving in two cupuliforms, first glass
Shape 2 is equipped with the first driving tri- luminescence chip of IC4 He mono- ﹑ bis- ﹑, and the second cupuliform 3 is equipped with the second driving IC5 He tri- ﹑ tetra- ﹑ five and sends out
Optical chip, six luminescence chips are respectively arranged on corresponding pad, and driving IC and each luminescence chip, each conduction of PLC technology are drawn
It is connected between foot by electric wire, control luminescence chip individually shines, luminous two-by-two or more shine simultaneously.Working principle
It is as follows: if Fig. 1 present invention is by being integrated in a package carrier for the driving IC of two PLC technologies and six luminescence chips
In bowl, the package carrier is set there are two eight pads of bowl cup ﹑ and eight conductive pins being attached thereto, and two bowls are respectively set
There are the driving IC and three luminescence chips of a PLC technology, Fa light Xin Pian ﹑ is driven by IC and pad phase by electric wire
Even, corresponding colloid is filled in two cupuliforms respectively, the encapsulating structure is protected, the encapsulation glue can be according to reality
Demand fills white light Jiao Ti ﹑ mist colloid or transparent colloid, is allowed to form two independent three-channel driving circuits, then lead to
The controller for crossing a dual signal output as shown in FIG. 6 controls the driving circuit, is allowed to form one complete six
The LED of channel PLC technology.First driving IC and the second driving IC is high quality external control single serial cascade constant current IC, interior
Set data shaping electricity ﹑ electrification reset and power-off reset electricity, feux rouges driving specially treated technology and shaping forwarding reinforcement technique.
In the present embodiment, driving IC selects high quality external control single serial to cascade constant current IC, increases the stability of route.
Embodiment three
As shown in Figures 1 to 6, the LED of a kind of six channel PLC technology, including 1, six luminescence chip of package carrier and
Drive IC；Six luminescence chips are the first luminescence chip 6, the second luminescence chip 7, third luminescence chip 8, the 4th luminous core respectively
Piece 9, the 5th luminescence chip 10, the 6th luminescence chip 11, driving IC are the driving of the first driving IC4 and second IC 5 respectively；Encapsulation
Carrier is in bowl shape, inside sets two cupuliforms, is the first cupuliform 2 and the second cupuliform 3 respectively, is equipped with eight metal pads in cupuliform,
Each pad extends corresponding conductive pin, and each pin is located at package carrier bottom, and eight pads are the connection of the first pad 12 respectively
First pin 20, the second pad 13 connect second pin 21, and third pad 14 connects third pin 22, the 4th pad 15 connection the
Four pins 23, the 5th pad 16 connect the 5th pin 24, and the 6th pad 17 connects the 6th pin 25, the 7th pad 18 connection the 7th
Pin 26, the 8th pad 19 connect the 8th pin 27；Respectively set IC and three luminescence chip of a driving in two cupuliforms, first glass
Shape 2 is equipped with the first driving tri- luminescence chip of IC4 He mono- ﹑ bis- ﹑, and the second cupuliform 3 is equipped with the second driving IC5 He tri- ﹑ tetra- ﹑ five and sends out
Optical chip, six luminescence chips are respectively arranged on corresponding pad, and driving IC and each luminescence chip, each conduction of PLC technology are drawn
It is connected between foot by electric wire, control luminescence chip individually shines, luminous two-by-two or more shine simultaneously.Working principle
It is as follows: if Fig. 1 present invention is by being integrated in a package carrier for the driving IC of two PLC technologies and six luminescence chips
In bowl, the package carrier is set there are two eight pads of bowl cup ﹑ and eight conductive pins being attached thereto, and two bowls are respectively set
There are the driving IC and three luminescence chips of a PLC technology, Fa light Xin Pian ﹑ is driven by IC and pad phase by electric wire
Even, corresponding colloid is filled in two cupuliforms respectively, the encapsulating structure is protected, the encapsulation glue can be according to reality
Demand fills white light Jiao Ti ﹑ mist colloid or transparent colloid, is allowed to form two independent three-channel driving circuits, then lead to
The controller for crossing a dual signal output as shown in FIG. 6 controls the driving circuit, is allowed to form one complete six
The LED of channel PLC technology, eight pins are respectively power pins VDD1, VDD2, signal output pin DOUT1, DOUT2,
Signal input pin DIN1 ﹑
DIN2, grounding pin GND1 and GND2, wherein it is that DIN1 ﹑ third pin is that the first pin, which is GND1 ﹑ second pin,
It is the 6th pin of VDD2 ﹑ be the 7th pin of DOUT2 ﹑ is that the 8th pin of VDD2 ﹑ is that the 4th pin of GND2 ﹑, which is the 5th pin of DIN2 ﹑,
DOUT1 is illustrated in figure 5 the LED bottom structure perspective view of the multichannel PLC technology, it is shown that bottom land shape and
Structure；It is illustrated in figure 6 the finished product application principle figure of the LED of the multichannel PLC technology, passes through a dual output letter
Number controller connect two driving IC of the LED, by the DIN of the first driving of the first signal path 28 connection IC, the
The connection of binary signal channel 29 second driving IC, and then realize the functional characteristic that single lamp bead has six channels, while each cup
Body is all an independent three-channel driving circuit, is driven two independent triple channels by the controller of a dual output signal
The LED circuit of dynamic one complete six channel PLC technology of circuit perfect integration, relatively conventional built-in IC triple channel or four
For channel LED, the present invention has the color effect in six channels, and the IC LED four-way as built in routine can have R ﹑ G ﹑ B ﹑ simultaneously
Tetra- color luminescence chip of Y, the present invention can then have six color luminescence chip of R ﹑ G ﹑ B ﹑ W ﹑ Y ﹑ O simultaneously, arranged in pairs or groups two-by-two when luminescence chip or
When NN arranges in pairs or groups, photochromic effect that six channel LEDs are issued by be IC LED four-way institute illuminant colour effect built in routine geometry
Multiple, the present invention enrich the chromaticity of conventional lamp bead；IC lamp bead built in routine is wanted to achieve the effect that six channels are needed two
Built-in IC lamp bead and together, and the present invention only needs a lamp bead to realize the effect in six channels.
In the present embodiment, finished product wiring board is simpler, succinctly, to reduce failure rate, improves reliability, reduces into
The route of product lamps and lanterns designs and produces cost, reduces finished-product volume, keeps lamp bead application field of the present invention more extensive.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of LED of six channel PLC technologies, it is characterised in that: including package carrier (1), six luminescence chips, first
IC (4) and the second driving IC (5) are driven, two cupuliforms is set in the package carrier, four pads, each weldering is set in each cupuliform
Disk extends corresponding conductive pin, respectively sets in two cupuliforms and is respectively equipped with the driving of the first driving IC (4) and second IC (5), and two
Three luminescence chips are respectively provided in a cupuliform, first driving IC (4) is separately connected in cupuliform locating for the first driving IC (4)
Pad and luminescence chip, second driving IC (5) are separately connected pad and luminous core in cupuliform locating for the second driving IC (5)
Piece.
2. a kind of LED of six channel PLC technology according to claim 1, it is characterised in that: the conductive pin position
In the bottom of package carrier (1).
3. a kind of LED of six channel PLC technology according to claim 1, it is characterised in that: six luminous cores
Piece is that a kind of color or multiple color are arranged in pairs or groups.
4. a kind of LED of six channel PLC technology according to claim 1, it is characterised in that: the first driving IC
(4) and the second driving IC (5) is high quality external control single serial cascade constant current IC, onboard data shaping electricity ﹑ electrification reset
With power-off reset electricity.
5. a kind of LED of six channel PLC technology according to claim 1, it is characterised in that: the package carrier (1)
Interior filling packing colloid.
6. a kind of LED of six channel PLC technology according to claim 1, it is characterised in that: the conductive pin point
Not Wei power pins VDD1, VDD2, signal output pin DOUT1, DOUT2, signal input pin DIN1 ﹑ DIN2, grounding pin
GND1 and GND2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134877.4A CN109065530A (en) | 2018-09-28 | 2018-09-28 | A kind of LED of six channel PLC technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134877.4A CN109065530A (en) | 2018-09-28 | 2018-09-28 | A kind of LED of six channel PLC technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109065530A true CN109065530A (en) | 2018-12-21 |
Family
ID=64766313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811134877.4A Pending CN109065530A (en) | 2018-09-28 | 2018-09-28 | A kind of LED of six channel PLC technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN109065530A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190171A (en) * | 2019-04-27 | 2019-08-30 | 深圳市长方集团股份有限公司 | A kind of ten footlights source of SMD-RGBWY polychrome |
| CN110957312A (en) * | 2019-11-29 | 2020-04-03 | 深圳极光王科技股份有限公司 | Four-pin LED lamp bead with built-in chip and LED display module |
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| WO2015192413A1 (en) * | 2014-06-19 | 2015-12-23 | 深圳市华星光电技术有限公司 | Led packaging structure and liquid crystal display device |
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| CN110190171A (en) * | 2019-04-27 | 2019-08-30 | 深圳市长方集团股份有限公司 | A kind of ten footlights source of SMD-RGBWY polychrome |
| CN110957312A (en) * | 2019-11-29 | 2020-04-03 | 深圳极光王科技股份有限公司 | Four-pin LED lamp bead with built-in chip and LED display module |
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Application publication date: 20181221 |