Integrated System of Micro-LED

Abstract

An embodiment of the present invention discloses an integrated system for Micro-LED. The system includes: an FPGA chip for generating control signals; a PCB circuit board including a signal transfer circuit and a power conversion circuit, where the signal transfer circuit is used to receive the control signals sent by the FPGA chip, and the power conversion circuit is used to receive the operating voltage transmitted by the FPGA chip and convert the power supply into a low-voltage analog voltage and a low-voltage digital voltage; a Micro-LED display module including a Micro-LED display array and a Micro-LED driver chip, and the Micro-LED driver chip is used to drive the Micro-LED display array to light up according to the control signals sent by the signal transfer circuit, the low-voltage analog voltage and the low-voltage digital voltage sent by the power conversion circuit. The embodiment of the present invention realizes the miniaturized integration of the Micro-LED display system.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, and in particular to an integrated system for Micro-LEDs. Background Art

[0002] Micro-LED is a new generation of display technology, which has higher brightness, better luminous efficiency and lower power consumption than the existing OLED technology. Since its chip size is less than 50 nanometers, it is widely used in small-sized electronic devices.

[0003] However, there are too many electronic components in the existing Micro-LED display system. With the increasing miniaturization of electronic devices, the miniaturized integration of the Micro-LED display system far from meets the requirements of existing electronic devices. Therefore, the integration of the Micro-LED display system has become an urgent problem to be solved. Summary of the Invention

[0004] Based on this, it is necessary to propose an integrated system for Micro-LEDs in view of the above problems.

[0005] An embodiment of the present invention provides an integrated system for Micro-LEDs, and the system includes:

[0006] An FPGA chip for generating control signals;

[0007] A PCB circuit board including a signal transfer circuit and a power conversion circuit. The signal transfer circuit is connected to the FPGA chip, and the signal transfer circuit is used to receive the control signals sent by the FPGA chip. The power conversion circuit is connected to the FPGA chip, and the power conversion circuit is used to receive the operating voltage transmitted by the FPGA chip and convert the power supply into a low-voltage analog voltage and a low-voltage digital voltage;

[0008] A Micro-LED display module including a Micro-LED display array and a Micro-LED driver chip. The Micro-LED display array is connected to the Micro-LED driver chip, and the Micro-LED driver chip is respectively connected to the signal transfer circuit and the power conversion circuit. The Micro-LED driver chip is used to drive the Micro-LED display array to light up according to the control signals sent by the signal transfer circuit, the low-voltage analog voltage and the low-voltage digital voltage sent by the power conversion circuit.

[0009] Preferably, the power conversion circuit includes a DC transformer and a low-dropout linear regulator. The DC transformer is used to convert the power supply into a low-voltage digital voltage, and the low-dropout linear regulator is used to convert the power supply into a low-voltage analog voltage.

[0010] Preferably, the FPGA chip includes a Mini-USB interface, and the FPGA chip provides the operating voltage to the FPGA chip through the Mini-USB interface.

[0011] Preferably, the signal lines of the FPGA chip are processed with equal-length routing.

[0012] Preferably, the PCB board 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 transfer circuit, and the control driving circuit is configured to send a control signal to the signal transfer circuit according to the control of the control module.

[0013] Preferably, the PCB board 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.

[0014] Preferably, the FPGA chip further includes a clock divider and a clock multiplier, the clock divider is connected to the clock circuit, the clock divider is configured to convert the clock signal into a low-frequency clock signal, the clock multiplier is connected to the clock circuit, and the clock multiplier is configured to convert the clock signal into a high-frequency clock signal.

[0015] Preferably, the FPGA chip further includes a ping-pong buffer, and the ping-pong buffer is connected to the control driving circuit.

[0016] Preferably, the control module includes a DIP switch and a button.

[0017] Preferably, the FPGA chip further includes a control debounce module, the control debounce module is connected to the DIP switch and the button, the control debounce module is connected to the control driving circuit, and the control debounce module is configured to eliminate the jitter of the DIP switch and the button.

[0018] In the embodiment of the present invention, by integrating the signal transfer circuit and the power conversion circuit on the PCB board, the FPGA chip can directly drive the Micro-LED display module through the PCB board, solving the problem that the miniaturized integration of the Micro-LED display system far from meets the requirements of existing electronic devices, and obtaining the beneficial effect of the miniaturized integration of the Micro-LED display system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Among them:

[0021] Figure 1 It is a structural block diagram of an integrated system of Micro-LEDs in an embodiment;

[0022] Figure 2 It is a structural block diagram of an integrated system of Micro-LEDs in an embodiment. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] As Figure 1 shown, in an embodiment, an integrated system of Micro-LEDs is provided. The integrated system of Micro-LEDs specifically includes an FPGA chip 100, a PCB circuit board 200, and a Micro-LED display module 300.

[0025] Specifically, the FPGA chip 100 is used to generate control signals; the PCB circuit board 200 includes a signal transfer circuit 210 and a power conversion circuit 220. The signal transfer circuit 210 is connected to the FPGA chip 100 and is used to receive the control signals sent by the FPGA chip 100. The power conversion circuit 220 is connected to the FPGA chip 100 and is used to receive the operating voltage transmitted by the FPGA chip 100 and convert the power supply into a low-voltage analog voltage and a low-voltage digital voltage; the Micro-LED display module 300 includes a Micro-LED display array 320 and a Micro-LED driving chip 310. The Micro-LED display array 320 is connected to the Micro-LED driving chip 310, and the Micro-LED driving chip 310 is respectively connected to the signal transfer circuit 210 and the power conversion circuit 220. The Micro-LED driving chip 310 is used to drive the Micro-LED display array 320 to light up according to the control signals sent by the signal transfer circuit 210, the low-voltage analog voltage and the low-voltage digital voltage sent by the power conversion circuit 220.

[0026] In this embodiment, the FPGA chip 100 is a Field Programmable Gate Array, and the PCB circuit board 200 is a Printed Circuit Board. In one embodiment, the Micro-LED display module 300 can also be replaced by a Mini-LED display module. When using the integrated system of this Micro-LED, the user can first control 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 circuit board 200 through an external power supply, and outputs a control signal to the signal transfer circuit 210 on the PCB circuit board 200. At this time, since the power conversion circuit 220 and the signal transfer circuit 210 are separately integrated on the PCB circuit board 200, signal disorder will not occur. The power conversion circuit 220 will convert the power supply into a low-voltage analog voltage and a low-voltage digital voltage. The low-voltage analog voltage and the low-voltage digital voltage are isolated, so frequency interference can also be avoided inside the power conversion circuit 220. The low-voltage analog voltage can be 3.3V, which is used to determine the lighting time and brightness of the Micro-LED display array 320 within one frame. The low-voltage digital voltage can also be 3.3V, which serves as the lighting reference voltage for the Micro-LED display array 320. Then the signal transfer circuit 210 sends the control signal, and the voltage conversion circuit sends the low-voltage analog voltage and the low-voltage digital voltage to the Micro-LED driver chip 310. The Micro-LED driver 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.

[0027] In one embodiment, the power conversion circuit 220 includes a DC transformer 221 (DC-DC module) and a low-dropout linear regulator 222 (LDO module). The DC transformer 221 is used to convert the power supply into a low-voltage digital voltage, and the low-dropout linear regulator 222 is used to convert the power supply into a low-voltage analog voltage. The DC transformer 221 and the low-dropout linear regulator 222 are isolated from each other, so that the low-voltage analog voltage and the low-voltage digital voltage are isolated. In addition, the low-dropout linear regulator 222 provides a stable and non-oscillating low-voltage analog voltage, making the display of the Micro-LED display array 320 more stable.

[0028] In the embodiment of the present invention, by integrating the signal transfer circuit and the power conversion circuit on the PCB circuit board, the FPGA chip can directly drive the Micro-LED display module 300 through the PCB circuit board, solving the problem that the miniaturized integration of the Micro-LED display system far from meets the requirements of existing electronic devices, and obtaining the beneficial effect of the miniaturized integration of the Micro-LED display system.

[0029] As Figure 2 shown, in another embodiment, an integrated system of Micro-LEDs is provided. Among them, the PCB circuit board 200 further includes a control module 230 and a clock circuit 240. The FPGA chip 100 includes a Mini-USB interface 110, a control and drive circuit 120, a clock divider 130, a clock multiplier 140, a ping-pong buffer 150, and a control debounce module 160.

[0030] Specifically, the control module 230 is connected to the FPGA chip 100, the control and drive circuit 120 is connected to the control module 230, the control and drive circuit 120 is connected to the signal transfer circuit 210, and the control and drive circuit 120 is used to send a control signal to the signal transfer circuit 210 according to the control of the control module 230. The clock circuit 240 is connected to the control and drive circuit 120, and the clock circuit 240 is used to provide a clock signal to the control and drive circuit 120. The FPGA chip 100 provides a working voltage to the FPGA chip 100 through the Mini-USB interface 110. The clock divider 130 is connected to the clock circuit 240, and the clock divider 130 is used 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 used to convert the clock signal into a high-frequency clock signal. The ping-pong buffer 150 is connected to the control and drive circuit 120. The control debounce module 160 is connected to the DIP switch 231 and the button 232, and the control debounce module 160 is connected to the control and drive circuit 120. The control debounce module 160 is used to eliminate the jitter of the DIP switch 231 and the button 232.

[0031] In this embodiment, when generating the control signal and the working voltage, specifically, a 5V working voltage is provided to the FPGA chip 100 through the Mini-USB interface 110, and then the FPGA chip 100 continues to provide the 5V working voltage to the power conversion circuit 220. The control module 230 includes a DIP switch 231 and a button 232, and both the DIP switch 231 and the button 232 are integrated on the PCB circuit board 200. The number of the DIP switch 231 and the button 232 can both be 3. Combining the DIP switch 231 and the button 232 can control the FPGA chip 100 to generate different control signals, thereby controlling the working mode of the Micro-LED display array 320. The user presses the DIP switch 231 and the button 232 to control the control driving circuit 120 to generate a control signal. The control debounce module 160 can eliminate the jitter of the DIP switch 231 and the button 232. In addition, the control driving circuit 120 receives the clock signal provided by the clock circuit 240. The clock signal can be 50MHz. Then the clock divider 130 in the FPGA chip 100 will convert the clock signal into a 10MHz low-frequency clock signal, and the clock multiplier 140 will convert the clock signal into a 100MHz high-frequency clock signal. At this time, the control driving circuit 120 receives the 10MHz low-frequency clock signal and the 100MHz high-frequency clock signal. In addition, the control driving circuit 120 reads and writes data through the ping-pong buffer 150. The ping-pong buffer 150 includes at least two memories, and each memory caches one row of data. Preferably, the FPGA chip 100 further includes an SD card reading and writing circuit. The external SD card is connected to the SD card reading and writing circuit. The ping-pong buffer 150 can be connected to the SD card reading and writing circuit to read the data in the external SD card. In summary, the control driving circuit 120 generates a control signal according to the user's operation on the control module 230 and sends the control signal to the signal transfer circuit 210.

[0032] Preferably, the signal lines of the FPGA chip 100 are processed with equal-length routing, thereby ensuring the transmission stability and synchronization of high-speed control signals. In one embodiment, the Micro-LED driving chip 310 can also be integrated on the PCB circuit board 200.

[0033] By integrating the control module and the clock circuit on the PCB circuit board, the embodiment of the present invention further realizes the miniaturized integration of the Micro-LED display system.

[0034] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not conflict, it should be considered to be within the scope described in this specification.

[0035] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An integrated system for Micro-LEDs, characterized in that, The system includes: an FPGA chip for generating control signals; a PCB circuit board including a signal transfer circuit and a power conversion circuit separately integrated on the PCB circuit board, where: the signal transfer circuit is connected to the FPGA chip, and the signal transfer circuit is configured to receive the control signals sent by the FPGA chip and send them to the Micro-LED driving chip; the power conversion circuit is connected to the FPGA chip, and the power conversion circuit is configured to receive the operating voltage transmitted by the FPGA chip, convert the operating voltage into a low-voltage analog voltage and a low-voltage digital voltage, and send them to the Micro-LED driving chip; a Micro-LED display module including a Micro-LED display array and a Micro-LED driving chip, the Micro-LED display array is connected to the Micro-LED driving chip, the Micro-LED driving chip is respectively connected to the signal transfer circuit and the power conversion circuit, the Micro-LED driving chip is integrated on the PCB circuit board, and is configured to drive the Micro-LED display array to light up according to the control signals sent by the signal transfer circuit, the low-voltage analog voltage and the low-voltage digital voltage sent by the power conversion circuit; wherein, the power conversion circuit includes an isolated DC transformer and a low-dropout linear regulator, the DC transformer is configured to convert the operating voltage into a low-voltage digital voltage, and the low-dropout linear regulator is configured to convert the operating voltage into a low-voltage analog voltage; wherein, the DC transformer and the low-dropout linear regulator are isolated from each other, so that the power conversion circuit outputs isolated low-voltage analog voltage and low-voltage digital voltage; wherein, the PCB circuit board further includes a control module integrated on the PCB circuit board, 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 transfer circuit, and the control driving circuit is configured to send control signals to the signal transfer circuit according to the control of the control module; wherein, the PCB circuit board further includes a clock circuit integrated on the PCB circuit board, 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.

2. The system according to claim 1, characterized in that, The FPGA chip includes a Mini-USB interface, and the FPGA chip provides the operating voltage to the FPGA chip through the Mini-USB interface.

3. The system according to claim 1, characterized in that, The signal lines of the FPGA chip are processed with equal-length routing.

4. The system according to claim 1, characterized in that, The FPGA chip further includes a clock divider and a clock multiplier, the clock divider is connected to the clock circuit, the clock divider is configured to convert the clock signal into a low-frequency clock signal, the clock multiplier is connected to the clock circuit, and the clock multiplier is configured to convert the clock signal into a high-frequency clock signal.

5. The system according to claim 1, characterized in that, The FPGA chip further includes a ping-pong buffer, and the ping-pong buffer is connected to the control and drive circuit.

6. The system according to claim 1, characterized in that, The control module includes a DIP switch and a button.

7. The system according to claim 6, characterized in that, The FPGA chip further includes a control debounce module, the control debounce module is connected to the DIP switch and the button, the control debounce module is connected to the control and drive circuit, and the control debounce module is used to eliminate the jitter of the DIP switch and the button.

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