CN112863430A - Integrated system of Micro-LED - Google Patents

Integrated system of Micro-LED Download PDF

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Publication number
CN112863430A
CN112863430A CN202110201680.3A CN202110201680A CN112863430A CN 112863430 A CN112863430 A CN 112863430A CN 202110201680 A CN202110201680 A CN 202110201680A CN 112863430 A CN112863430 A CN 112863430A
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CN
China
Prior art keywords
control
micro
circuit
voltage
fpga chip
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Pending
Application number
CN202110201680.3A
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Chinese (zh)
Inventor
刘召军
叶嘉豪
吕志坚
盘福波
劳兴超
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Shenzhen Stan Technology Co Ltd
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Shenzhen Stan Technology Co Ltd
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Publication of CN112863430A publication Critical patent/CN112863430A/en
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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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The embodiment of the invention discloses an integrated system of Micro-LEDs. The system comprises: the FPGA chip is used for generating a control signal; the PCB circuit board comprises a signal switching circuit and a power supply switching circuit, wherein the signal switching circuit is used for receiving a control signal sent by the FPGA chip, and the power supply switching circuit is used for receiving working voltage transmitted by the FPGA chip and converting a power supply into low-voltage analog voltage and low-voltage digital voltage; the Micro-LED display module comprises a Micro-LED display array and a Micro-LED driving chip, wherein the Micro-LED driving chip is used for driving the Micro-LED display array to be lightened according to a control signal sent by the signal switching circuit, a low-voltage analog voltage sent by the power supply switching circuit and a low-voltage digital voltage. The embodiment of the invention realizes the small integration of the Micro-LED display system.

Description

Integrated system of Micro-LED
Technical Field
The invention relates to the technical field of LEDs, in particular to an integrated system of a Micro-LED.
Background
Micro-LEDs are a new generation of display technology, with higher brightness, better luminous efficiency, but lower power consumption than the existing OLED technology. Since the wafer size thereof is less than 50 nm, it is widely used in small-sized electronic devices.
However, the number of electronic components in the existing Micro-LED display system is too many, and with the increasing miniaturization of electronic devices, the requirement of the existing electronic devices cannot be met by the small integration of the Micro-LED display system, so that the integration of the Micro-LED display system becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, it is necessary to provide an integrated system of Micro-LEDs.
The embodiment of the invention provides an integrated system of Micro-LEDs, which comprises:
the FPGA chip is used for generating a control signal;
the PCB circuit board comprises a signal switching circuit and a power supply switching circuit, the signal switching circuit is connected with the FPGA chip and is used for receiving a control signal sent by the FPGA chip, the power supply switching circuit is connected with the FPGA chip and is used for receiving working voltage transmitted by the FPGA chip and converting the power supply into low-voltage analog voltage and low-voltage digital voltage;
the Micro-LED display module comprises a Micro-LED display array and a Micro-LED driving chip, wherein the Micro-LED display array is connected with the Micro-LED driving chip, the Micro-LED driving chip is respectively connected with the signal switching circuit and the power conversion circuit, and the Micro-LED driving chip is used for driving the Micro-LED display array to be lightened according to a control signal sent by the signal switching circuit, and low-voltage analog voltage and low-voltage digital voltage sent by the power conversion circuit.
Preferably, the power conversion circuit includes a dc transformer and a low dropout regulator, the dc transformer is configured to convert the power supply into a low voltage digital voltage, and the low dropout regulator is configured to convert the power supply into a low voltage analog voltage.
Preferably, the FPGA chip comprises a Mini-USB interface, and the FPGA chip provides the working voltage for the FPGA chip through the Mini-USB interface.
Preferably, the signal lines of the FPGA chip are processed by equal-length routing.
Preferably, the PCB further includes a control module, the control module is connected to the FPGA chip, the FPGA chip includes a control driving circuit, the control driving circuit is connected to the control module, the control driving circuit is connected to the signal switching circuit, and the control driving circuit is configured to send a control signal to the signal switching circuit according to control of the control module.
Preferably, the PCB further includes a clock circuit, the clock circuit is connected to the control driving circuit, and the clock circuit is configured to provide a clock signal to the control driving circuit.
Preferably, the FPGA chip further includes a clock frequency divider and a clock frequency multiplier, the clock frequency divider is connected to the clock circuit, the clock frequency divider is configured to convert the clock signal into a low-frequency clock signal, the clock frequency multiplier is connected to the clock circuit, and the clock frequency multiplier is configured to convert the clock signal into a high-frequency clock signal.
Preferably, the FPGA chip further includes a ping-pong buffer, and the ping-pong buffer is connected to the control driving circuit.
Preferably, the control module comprises a dial switch and a key.
Preferably, the FPGA chip further includes a control jitter elimination module, the control jitter elimination module is connected to the dial switch and the keys, the control jitter elimination module is connected to the control driving circuit, and the control jitter elimination module is configured to eliminate jitter of the dial switch and the keys.
According to the embodiment of the invention, the signal switching circuit and the power switching circuit are integrated on the PCB, so that the FPGA chip can directly drive the Micro-LED display module through the PCB, the problem that the Micro-LED display system is greatly incapable of meeting the requirements of the conventional electronic equipment due to small integration is solved, and the beneficial effect of small integration of the Micro-LED display system is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a block diagram of an integrated system of Micro-LEDs in one embodiment;
FIG. 2 is a block diagram of an integrated system of Micro-LEDs in one embodiment.
Detailed Description
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. 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.
In one embodiment, as shown in FIG. 1, an integrated system of Micro-LEDs is provided. The integrated system of the Micro-LED specifically comprises an FPGA chip 100, a PCB circuit board 200 and a Micro-LED display module 300.
Specifically, the FPGA chip 100 is configured to generate a control signal; the PCB circuit board 200 comprises a signal switching circuit 210 and a power supply switching circuit 220, the signal switching circuit 210 is connected with the FPGA chip 100, the signal switching circuit 210 is used for receiving a control signal sent by the FPGA chip 100, the power supply switching circuit 220 is connected with the FPGA chip 100, and the power supply switching circuit 220 is used for receiving working voltage transmitted by the FPGA chip 100 and converting a power supply into low-voltage analog voltage and low-voltage digital voltage; the Micro-LED display module 300 comprises a Micro-LED display array 320 and a Micro-LED driving chip 310, the Micro-LED display array 320 is connected with the Micro-LED driving chip 310, the Micro-LED driving chip 310 is respectively connected with the signal switching circuit 210 and the power conversion circuit 220, and the Micro-LED driving chip 310 is used for driving the Micro-LED display array 320 to light according to a control signal sent by the signal switching circuit 210, a low-voltage analog voltage sent by the power conversion circuit 220 and a low-voltage digital voltage.
In this embodiment, the FPGA chip 100 is a Field Programmable Gate Array (Field Programmable Gate Array), the PCB 200 is a Printed Circuit Board (Printed Circuit Board), and in one embodiment, the Micro-LED display module 300 may be replaced by a Mini-LED display module. When the Micro-LED integrated system is used, a user can firstly control the FPGA chip 100 to enable the FPGA chip 100 to generate a control signal, the FPGA chip 100 outputs a 5V working voltage to the power conversion circuit 220 on the PCB 200 through an external power supply and outputs the control signal to the signal switching circuit 210 on the PCB 200, at the moment, because the power conversion circuit 220 and the signal switching circuit 210 are separately integrated on the PCB 200, no signal disorder is generated, the power conversion circuit 220 can convert the power supply into a low-voltage analog voltage and a low-voltage digital voltage, wherein the low-voltage analog voltage and the low-voltage digital voltage are isolated, so that frequency interference can be avoided in the power conversion circuit 220, the low-voltage analog voltage can be 3.3V and is used for determining the lighting time and the brightness of the Micro-LED display array 320 in one frame, the low voltage digital voltage may also be 3.3V as a lighting reference voltage for the Micro-LED display array 320. Then, the signal switching circuit 210 sends the control signal, the voltage conversion circuit generates a low-voltage analog voltage and a low-voltage digital voltage to the Micro-LED driving chip 310, and the Micro-LED driving chip 310 drives the Micro-LED display array 320 to light up according to the control signal, the low-voltage analog voltage and the low-voltage digital voltage sent by the power conversion circuit 220.
In one embodiment, the power conversion circuit 220 includes a DC transformer 221(DC-DC module) and a low dropout regulator 222(LDO module), the DC transformer 221 is used for converting the power source into a low voltage digital voltage, the low dropout regulator 222 is used for converting the power source into a low voltage analog voltage, the DC transformer 221 and the low dropout regulator 222 are isolated from each other, so that the low voltage analog voltage and the low voltage digital voltage are isolated, and further, the low dropout regulator 222 provides a stable and non-oscillating low voltage analog voltage, so that the display of the Micro-LED display array 320 is more stable.
In the embodiment of the invention, the signal switching circuit and the power switching circuit are integrated on the PCB, so that the FPGA chip can directly drive the Micro-LED display module 300 through the PCB, the problem that the Micro-LED display system is greatly incapable of meeting the requirements of the conventional electronic equipment due to small integration is solved, and the beneficial effect of small integration of the Micro-LED display system is obtained.
In another embodiment, as shown in FIG. 2, an integrated system of Micro-LEDs is provided. The PCB 200 further includes a control module 230 and a clock circuit 240, and the FPGA 100 includes a Mini-USB interface 110, a control driving circuit 120, a clock frequency divider 130, a clock frequency multiplier 140, a ping-pong buffer 150, and a control jitter elimination module 160.
Specifically, the control module 230 is connected to the FPGA chip 100, the control driving circuit 120 is connected to the control module 230, the control driving circuit 120 is connected to the signal switching circuit 210, and the control driving circuit 120 is configured to send a control signal to the signal switching circuit 210 according to the control of the control module 230. The clock circuit 240 is connected to the control driving circuit 120, and the clock circuit 240 is used for providing a clock signal to the control driving circuit 120. The FPGA chip 100 provides the operating voltage to the FPGA chip 100 through the Mini-USB interface 110. The clock divider 130 is connected to the clock circuit 240, the clock divider 130 is configured to convert the clock signal into a low frequency clock signal, the clock multiplier 140 is connected to the clock circuit 240, and the clock multiplier 140 is configured to convert the clock signal into a high frequency clock signal. The ping-pong buffer 150 is connected to the control driving circuit 120. The control jitter elimination module 160 is connected with the dial switch 231 and the key 232, the control jitter elimination module 160 is connected with the control driving circuit 120, and the control jitter elimination module 160 is used for eliminating jitter of the dial switch 231 and the key 232.
In this embodiment, when the control signal and the working voltage are generated, specifically, a working voltage of 5V is provided to the FPGA chip 100 through the Mini-USB interface 110, and then the FPGA chip 100 continues to provide the working voltage of 5V to the power conversion circuit 220. The control module 230 includes a dial switch 231 and a key 232, and both the dial switch 231 and the key 232 are integrated on the PCB 200. The number of the dial switches 231 and the number of the keys 232 can be 3, and the combination of the dial switches 231 and the keys 232 can control the FPGA chip 100 to generate different control signals, so that the working mode of the Micro-LED display array 320 is controlled. The user presses the control dial switch 231 and the key 232 to control the control driving circuit 120 to generate a control signal, wherein the control jitter elimination module 160 can eliminate jitter of the dial switch 231 and the key 232, in addition, the control driving circuit 120 receives a clock signal provided by the clock circuit 240, the clock signal can be 50MHz, then the clock divider 130 in the FPGA chip 100 can convert the clock signal into a low-frequency clock signal of 10MHz, the clock multiplier 140 can convert the clock signal into a high-frequency clock signal of 100MHz, at this time, the control driving circuit 120 receives the low-frequency clock signal of 10MHz and the high-frequency clock signal of 100MHz, in addition, the control driving circuit 120 reads and writes data through the ping-pong buffer 150, the buffer 150 comprises at least two memories, each memory buffers a line of ping-pong data, as preferred, the FPGA chip 100 further comprises an SD card read-write circuit, the external SD card is connected to the SD card read/write circuit, and the ping-pong buffer 150 can be connected to the SD card read/write circuit to read data in the external SD card, so as to control the driving circuit 120 to generate a control signal according to the operation of the user on the control module 230, and send the control signal to the signal transfer circuit 210.
Preferably, the signal lines of the FPGA chip 100 are processed by equal-length routing, so as to ensure the transmission stability and synchronization of high-speed control signals. In an embodiment, the Micro-LED driving chip 310 may also be integrated on the PCB circuit board 200.
According to the embodiment of the invention, the control module and the clock circuit are integrated on the PCB, so that the Micro-LED display system is further miniaturized and integrated.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An integrated system of Micro-LEDs, the system comprising:
the FPGA chip is used for generating a control signal;
the PCB circuit board comprises a signal switching circuit and a power supply switching circuit, the signal switching circuit is connected with the FPGA chip and is used for receiving a control signal sent by the FPGA chip, the power supply switching circuit is connected with the FPGA chip and is used for receiving working voltage transmitted by the FPGA chip and converting the power supply into low-voltage analog voltage and low-voltage digital voltage;
the Micro-LED display module comprises a Micro-LED display array and a Micro-LED driving chip, wherein the Micro-LED display array is connected with the Micro-LED driving chip, the Micro-LED driving chip is respectively connected with the signal switching circuit and the power conversion circuit, and the Micro-LED driving chip is used for driving the Micro-LED display array to be lightened according to a control signal sent by the signal switching circuit, and low-voltage analog voltage and low-voltage digital voltage sent by the power conversion circuit.
2. The system of claim 1, wherein the power conversion circuit comprises a dc transformer for converting the power supply to a low voltage digital voltage and a low dropout linear regulator for converting the power supply to a low voltage analog voltage.
3. The system of claim 1, wherein the FPGA chip includes a Mini-USB interface, the FPGA chip providing the operating voltage to the FPGA chip through the Mini-USB interface.
4. The system of claim 1, wherein the signal lines of the FPGA chip are routed using equal length routing.
5. The system of claim 1, wherein the PCB further comprises a control module, the control module is connected to the FPGA chip, the FPGA chip comprises a control driving circuit, the control driving circuit is connected to the control module, the control driving circuit is connected to the signal switching circuit, and the control driving circuit is configured to send a control signal to the signal switching circuit according to the control of the control module.
6. The system of claim 5, wherein the PCB circuit board further comprises a clock circuit, the clock circuit being connected to the control driver circuit, the clock circuit being configured to provide a clock signal to the control driver circuit.
7. The system of claim 6, wherein the FPGA chip further comprises a clock divider and a clock multiplier, the clock divider coupled to the clock circuit, the clock divider configured to convert the clock signal to a low frequency clock signal, the clock multiplier coupled to the clock circuit, the clock multiplier configured to convert the clock signal to a high frequency clock signal.
8. The system of claim 5, wherein the FPGA chip further comprises a ping-pong buffer, the ping-pong buffer being coupled to the control driver circuit.
9. The system of claim 5, wherein the control module comprises a dial switch and a key.
10. The system according to claim 9, wherein the FPGA chip further comprises a control jitter elimination module, the control jitter elimination module is connected to the dial switch and the keys, the control jitter elimination module is connected to the control driving circuit, and the control jitter elimination module is configured to eliminate jitter of the dial switch and the keys.
CN202110201680.3A 2021-01-12 2021-02-23 Integrated system of Micro-LED Pending CN112863430A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110038846 2021-01-12
CN2021100388464 2021-01-12

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CN112863430A true CN112863430A (en) 2021-05-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115841799A (en) * 2023-02-23 2023-03-24 长春希达电子技术有限公司 Active Micro-LED display control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115841799A (en) * 2023-02-23 2023-03-24 长春希达电子技术有限公司 Active Micro-LED display control system

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