CN111768721A - LED lamp pearl of four-wire inner seal IC with two-way data transmission - Google Patents
LED lamp pearl of four-wire inner seal IC with two-way data transmission Download PDFInfo
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- CN111768721A CN111768721A CN202010713141.3A CN202010713141A CN111768721A CN 111768721 A CN111768721 A CN 111768721A CN 202010713141 A CN202010713141 A CN 202010713141A CN 111768721 A CN111768721 A CN 111768721A
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- data transmission
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- bidirectional data
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 77
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 93
- 238000004806 packaging method and process Methods 0.000 claims abstract description 30
- 239000011324 bead Substances 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000003292 glue Substances 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims description 13
- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 5
- 201000005569 Gout Diseases 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- H01L25/16—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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a four-wire internally-sealed IC LED lamp bead with bidirectional data transmission, which comprises: the LED light-emitting device comprises an LED light-emitting unit, a bidirectional data transmission IC chip, a power conversion chip, a packaging carrier and packaging glue; the power conversion chip is respectively connected with the bidirectional data transmission IC chip and the LED light-emitting unit through metal wires, and parallel output pins of the bidirectional data transmission IC chip are connected with the LED light-emitting unit through the metal wires; the packaging carrier is also provided with four metal conductive bonding pads, the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixedly arranged on the metal conductive bonding pads, and the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixed on the packaging carrier through packaging glue. The technical scheme of the invention solves the problem that the normal use of all lamp beads behind one LED lamp bead is influenced due to the damage of one LED lamp bead in the prior art, effectively avoids influencing the overall LED display, and has the advantages of simple wiring and the like.
Description
Technical Field
The invention relates to the technical field of bidirectional data transmission LED display, in particular to a four-wire internally-sealed IC LED lamp bead with bidirectional data transmission.
Background
At present, in order to prevent the damage of one LED lamp bead when the LED lamp beads are cascaded and influence the normal use of all lamp beads at the back of the lamp bead, six-wire driving is mostly adopted, namely when the LED lamp beads have problems, a standby input signal wire is used for transmitting signals, the influence on the overall LED display is avoided, and the circuit wiring of the mode is complex.
Disclosure of Invention
According to the technical problem provided above, a four-wire inner-sealed IC LED lamp bead with bidirectional data transmission is provided. The technical means adopted by the invention are as follows:
the utility model provides a LED lamp pearl of four-wire inner packaging IC with two-way data transmission, includes: the LED light-emitting device comprises an LED light-emitting unit, a bidirectional data transmission IC chip, a power conversion chip, a packaging carrier and packaging glue;
the power conversion chip is respectively connected with the bidirectional data transmission IC chip and the LED light-emitting unit through metal wires, and parallel output pins of the bidirectional data transmission IC chip are connected with the LED light-emitting unit through metal wires; the LED packaging structure is characterized in that four metal conductive bonding pads are further arranged on the packaging carrier, the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixedly arranged on the metal conductive bonding pads, and the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixed on the packaging carrier through packaging glue.
Further, the LED luminous units comprise R, G, B three LED luminous units
Further, the bidirectional data transmission IC chip internally includes: the OSC1 crystal oscillator, the OSC2 crystal oscillator, the output driver, the PWM generator, the shift register, the latch and the counter are electrically connected; the OSC1 crystal oscillator is used for data processing at the current level so as to drive the LED light-emitting unit; the OSC2 crystal oscillator is used for data forwarding processing, and cascade connection of data is achieved.
Further, the bidirectional data transmission IC chip further includes: eight pins, namely a data signal bidirectional port SDI/O, a data signal bidirectional port SDO/I, a power supply positive electrode VDD, a power supply negative electrode GND, a pin NC, a ROUT output, a GOUT output and a BOUT output.
Further, the four metal conductive pads are respectively connected with the data signal bidirectional port SDI/O, the data signal bidirectional port SDO/I, the power supply positive electrode VDD and the power supply negative electrode GND.
Furthermore, the bidirectional data transmission IC chip adopts return-to-zero codes to carry out signal transmission, controls output current one by one and is in infinite cascade connection.
Furthermore, the LED lamp bead of the four-wire inner-sealed IC is also connected with a controller, the controller comprises an SDA pin and an SDB pin, the SDA pin is connected with a data signal bidirectional port SDI/O of the bidirectional data transmission IC chip, the SDB pin is connected with a data signal bidirectional port SDO/I of the bidirectional data transmission IC chip, and the controller controls data transmission of the data signal bidirectional port to drive the LED light-emitting unit.
Compared with the prior art, the invention has the following advantages:
the LED lamp bead with the bidirectional data transmission four-wire inner-sealed IC provided by the invention solves the problem that the normal use of all lamp beads behind one LED lamp bead is influenced due to the damage of one LED lamp bead, effectively avoids influencing the overall LED display, and has the advantages of simple wiring and the like.
Based on the reasons, the invention can be widely popularized in the fields of bidirectional data transmission LED display and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the back structure of the device of the present invention.
Fig. 2 is an internal structural diagram of the bidirectional data transmission IC chip according to the present invention.
FIG. 3 is a pin diagram of a bidirectional data transmission IC chip according to the present invention.
FIG. 4 is a schematic diagram of the front structure of the device of the present invention.
FIG. 5 is a timing diagram of data signal transmission at the controller end according to the present invention.
FIG. 6 is a schematic diagram of an application circuit of the apparatus of the present invention.
In the figure: 1. an LED light emitting unit; 2. a bidirectional data transmission IC chip; 3. a power conversion chip; 4. a metal conductive pad; A. a transmission direction from the SDI/O data signal; B. from the direction of transmission of the SDO/I data signal.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides a four-wire internally-encapsulated IC LED lamp bead with bidirectional data transmission, including: the LED light-emitting device comprises an LED light-emitting unit 1, a bidirectional data transmission IC chip 2, a power conversion chip 3, a packaging carrier and packaging glue; the power conversion chip 3 is respectively connected with the bidirectional data transmission IC chip 2 and the LED light-emitting unit 1 through metal wires, and parallel output pins of the bidirectional data transmission IC chip 2 are connected with the LED light-emitting unit 1 through metal wires; the packaging carrier is further provided with four metal conductive bonding pads 4, the LED light-emitting unit 1, the bidirectional data transmission IC chip 2 and the power conversion chip 3 are fixedly arranged on the metal conductive bonding pads 4, pins on the packaging carrier are spaced through insulators, and the LED light-emitting unit 1, the bidirectional data transmission IC chip 2 and the power conversion chip 3 are fixed on the packaging carrier through packaging glue.
The bidirectional data transmission IC chip 2 adopts return-to-zero codes to carry out signal transmission, can control output current channel by channel, is infinitely cascaded, adopts bidirectional data redundancy transmission, realizes that data can also be continuously transmitted when one LED lamp bead has a problem, thereby avoiding influencing full screen display. In specific implementation, the bidirectional data transmission IC chip 2 uses a 5V power supply voltage, as shown in fig. 2, the bidirectional data transmission IC chip 2 includes: the OSC1 crystal oscillator, the OSC2 crystal oscillator, the output driver, the PWM generator, the shift register, the latch, the counter and shift register gating signals EN _ IO and EN _ OI are electrically connected; as shown in fig. 3, the bidirectional data transfer IC chip 2 includes: eight pins, namely a data signal bidirectional port SDI/O, a data signal bidirectional port SDO/I, a power supply positive electrode VDD, a power supply negative electrode GND, a pin NC, a ROUT output, a GOUT output and a BOUT output. In this embodiment, two crystal oscillators are selected, and the OSC1 crystal oscillator is mainly used for this level of data processing, so as to drive the LED light-emitting unit 1; the OSC2 crystal oscillator is mainly used for data forwarding processing, and realizes cascade connection of data. The specific working principle is as follows: data input by the data signal bidirectional port SDI/O and the data signal bidirectional port SDO/I are subjected to serial data shifting through respective shifting registers in data forwarding processing, when data transmission is finished, the data signal bidirectional port SDI/O and the data signal bidirectional port SDO/I can continue to be at a high level for a period of time, high level timing is carried out inside the bidirectional data transmission IC chip 2, and a gating signal is enabled when a certain time is reached, so that the data of the shifting registers in the data processing of the current stage are transmitted to latches for parallel output.
As shown in fig. 4, the schematic diagram of the front structure of the LED lamp bead of the four-wire inner package IC includes a data signal bidirectional port SDI/O, a data signal bidirectional port SDO/I, a power supply positive electrode VDD, and a power supply negative electrode GND, which are respectively connected to four metal pads 4.
During specific implementation, LED lamp pearl of four-wire inner sealing IC still connection director, and the controller includes SDA pin and SDB pin, and two-way data transmission IC chip 2's two-way port SDI/O is connected to the SDA pin, and two-way data transmission IC chip 2's two-way port SDO/I is connected to the SDB pin, and the data transmission through the two-way port of controller control data signal and then drive LED luminescence unit 1. Fig. 5 shows a timing chart of data signal transmission at the controller side. The controller updates the transmission data on the SDA line in an odd clock period and updates the transmission data on the SDB pin in an even period, thereby ensuring that the data refreshing is not conflicted; after data transmission is carried out on the data signal bidirectional port SDI/O and the data signal bidirectional port SDO/I, a high level lasting for a period of time is used as a shift register strobe signal; if the serial data connected with the SDA pin adopts 0123 … N sequence, in order to ensure that the LED lighting unit 1 displays correctly, the data transmission in the SDB pin needs to adopt N … 3210 sequence.
In specific implementation, preferably, the power conversion chip 3 can input a wide voltage range, the input voltage range is 9-40V, and the wide voltage range can be converted into 5V output voltage to supply power to the bidirectional data transmission IC chip 2 and the LED light-emitting unit 1.
In specific implementation, the LED lighting unit 1 preferably includes R, G, B three kinds of LED lighting units. .
In order to verify the effectiveness of the device of the present invention, fig. 6 is a schematic diagram of an application circuit of the invention. In fig. 6, a is a transfer direction from the SDI/O data signal, and B is a transfer direction from the SDO/I data signal. The specific working principle is as follows:
the SDA pin of the controller is connected with the data signal bidirectional port SDI/O of the first-stage bidirectional data transmission IC chip, the SDB pin of the controller is connected with the data signal bidirectional port SDO/I of the last-stage bidirectional data transmission IC chip, data input by the data signal bidirectional port SDI/O are divided into two parts, one part is output to R, G, B three LED light-emitting units 1 in parallel through the bidirectional data transmission IC chip, and the other part is transmitted to the data signal bidirectional port SDO/I and transmitted to the next-stage bidirectional data transmission IC chip. The data input by the controller from the data signal bidirectional port SDO/I is also divided into two parts, one part is output to R, G, B three kinds of LED lighting units 1 in parallel through the bidirectional data transmission IC chip, and the other part is transmitted to the data signal bidirectional port SDI/O and transmitted to the next-stage bidirectional data transmission IC chip. Due to the adoption of the bidirectional port data transmission, when the LED lamp beads have problems, namely if the input data of the data signal bidirectional port SDI/O is interrupted, the input data of the data signal bidirectional port SDO/I can still continue to carry out the cascade transmission of the data, so that the influence on full-screen display is avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a LED lamp pearl of four-wire inner packaging IC with two-way data transmission which characterized in that includes: the LED light-emitting device comprises an LED light-emitting unit, a bidirectional data transmission IC chip, a power conversion chip, a packaging carrier and packaging glue;
the power conversion chip is respectively connected with the bidirectional data transmission IC chip and the LED light-emitting unit through metal wires, and parallel output pins of the bidirectional data transmission IC chip are connected with the LED light-emitting unit through metal wires; the LED packaging structure is characterized in that four metal conductive bonding pads are further arranged on the packaging carrier, the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixedly arranged on the metal conductive bonding pads, and the LED light-emitting unit, the bidirectional data transmission IC chip and the power conversion chip are fixed on the packaging carrier through packaging glue.
2. The LED lamp bead with the bidirectional data transmission four-wire inner packaging IC of claim 1, wherein the LED light-emitting units comprise R, G, B three LED light-emitting units.
3. The LED lamp bead with the bidirectional data transmission four-wire inner packaging IC of claim 1, wherein the inside of the bidirectional data transmission IC chip comprises: the OSC1 crystal oscillator, the OSC2 crystal oscillator, the output driver, the PWM generator, the shift register, the latch and the counter are electrically connected; the OSC1 crystal oscillator is used for data processing at the current level so as to drive the LED light-emitting unit; the OSC2 crystal oscillator is used for data forwarding processing, and cascade connection of data is achieved.
4. The LED lamp bead with the bidirectional data transmission four-wire inner-packaging IC of claim 1, wherein the bidirectional data transmission IC chip adopts bidirectional data redundancy transmission, and comprises: eight pins, namely a data signal bidirectional port SDI/O, a data signal bidirectional port SDO/I, a power supply positive electrode VDD, a power supply negative electrode GND, a pin NC, a ROUT output, a GOUT output and a BOUT output.
5. The LED lamp bead with the bidirectional data transmission and four-wire inner-packaging IC of claim 1, wherein the four metal conductive pads are respectively connected to the data signal bidirectional port SDI/O, the data signal bidirectional port SDO/I, a power supply positive electrode VDD and a power supply negative electrode GND.
6. The LED lamp bead with the bidirectional data transmission four-wire inner-packaging IC as claimed in claim 1, wherein the bidirectional data transmission IC chip adopts return-to-zero codes for signal transmission, controls output current channel by channel, and is infinitely cascaded.
7. The LED lamp bead with the four-wire encapsulated IC for bidirectional data transmission of claim 1, wherein the LED lamp bead with the four-wire encapsulated IC is further connected to a controller, the controller comprises an SDA pin and an SDB pin, the SDA pin is connected to the data signal bidirectional port SDI/O of the bidirectional data transmission IC chip, the SDB pin is connected to the data signal bidirectional port SDO/I of the bidirectional data transmission IC chip, and the controller controls the data transmission of the data signal bidirectional port to drive the LED light-emitting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713141.3A CN111768721A (en) | 2020-07-22 | 2020-07-22 | LED lamp pearl of four-wire inner seal IC with two-way data transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010713141.3A CN111768721A (en) | 2020-07-22 | 2020-07-22 | LED lamp pearl of four-wire inner seal IC with two-way data transmission |
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| CN111768721A true CN111768721A (en) | 2020-10-13 |
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| CN202010713141.3A Pending CN111768721A (en) | 2020-07-22 | 2020-07-22 | LED lamp pearl of four-wire inner seal IC with two-way data transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115277872A (en) * | 2022-07-29 | 2022-11-01 | 深圳市铭濠科技有限公司 | Forward and reverse-based high-reliability data transmission method |
| WO2023020562A1 (en) * | 2021-08-19 | 2023-02-23 | 深圳市晶泓科技有限公司 | Bare lamp bead and led display screen |
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| CN212541778U (en) * | 2020-07-22 | 2021-02-12 | 大连集思特科技有限公司 | LED lamp pearl of four-wire inner seal IC with two-way data transmission |
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