CN114464126B - Scanning driving circuit of Micro LED and driving method thereof - Google Patents
Scanning driving circuit of Micro LED and driving method thereof Download PDFInfo
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- CN114464126B CN114464126B CN202210372443.8A CN202210372443A CN114464126B CN 114464126 B CN114464126 B CN 114464126B CN 202210372443 A CN202210372443 A CN 202210372443A CN 114464126 B CN114464126 B CN 114464126B
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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]
Abstract
The invention discloses a scanning driving circuit of a Micro LED and a driving method thereof, relating to the technical field of LEDs and comprising the following steps of; the clock extraction module is used for extracting a clock signal; the digital control module is used for converting and dividing image data information transmitted from the outside into a plurality of pixel signals and controlling the module to work; the scanning control module is used for controlling the LED module to display each row of pixels; the driving control module is used for improving the driving capability and controlling the electric energy of the LED module; and the LED module is used for displaying image data information. According to the scanning driving circuit and the driving method of the Micro LED, the clock extraction module extracts the required clock signal from the image data information transmitted from the outside, the image data information received by the digital control module is prevented from being disordered, the scanning control module can independently drive each line of pixels in the display to display, and the driving control module ensures that a plurality of display screens are driven.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to a scanning driving circuit of a Micro LED and a driving method thereof.
Background
Micro LED is Micro LED, which means that traditional LED is arrayed and is subjected to addressing huge amount after being Micro-scaled to be transferred to an ultra-small-distance LED formed on a circuit substrate, the length of millimeter-scale LED is further Micro-scaled to reach ultra-high pixel and ultra-high resolution, the Micro LED is similar to OLED, has the characteristics of no need of backlight source and self-luminescence, but compared with OLED, the color of the Micro LED is easier to debug accurately, the light-emitting service life is longer, the brightness is higher, so the Micro LED is known as the next generation display technology behind OLED, wherein a scanning driving circuit for the Micro LED is one of key technologies, but the existing driving circuit cannot meet the requirement on the brightness of the Micro LED and intelligent flicker control, and the Micro LED is required for realizing intelligent driving and stable high-frequency clock supply, and the Micro LED can realize stable flicker of different types.
Disclosure of Invention
The embodiment of the invention provides a scanning driving circuit of a Micro LED and a driving method thereof, which aim to solve the problems in the background technology.
According to a first aspect of the embodiments of the present invention, there are provided a scan driving circuit of a Micro LED and a driving method thereof, the scan driving circuit of the Micro LED including: the system comprises a power supply module, a clock extraction module, a digital control module, a scanning control module, a driving control module and an LED module;
the power supply module is used for providing electric energy;
the clock extraction module is connected with the digital control module and the scanning control module and used for extracting a required clock signal from image data information transmitted from the outside and providing the clock signal to the digital control module and the scanning control module;
the digital control module is used for receiving the clock signal, converting and dividing image data information transmitted from the outside into a plurality of pixel signals, transmitting the pixel signals to the scanning control module, and outputting a control signal and controlling the work of each module;
the scanning control module is connected with the digital control module and the clock extraction module, is used for receiving image data information and the clock signal transmitted from the outside, receiving the control signal output by the digital control module and outputting a scanning signal, is used for converting the scanning signal into a line scanning signal, is connected with the LED module, and is used for outputting a driving signal to control each line of pixels in the LED module according to the clock signal and the line scanning signal;
the driving control module and the digital control module are used for receiving the control signal output by the digital control module, improving the driving capability of the control signal, sampling and detecting the output electric energy of the power supply module, outputting a voltage signal, controlling the work of the LED module and maintaining the electric energy input into the LED module within a normal range;
and the LED module is used for displaying image data information transmitted from the outside through a plurality of display screens.
In order to solve the above technical problem, the present invention further provides a driving method of a Micro LED, including:
the clock extraction module extracts a required clock signal from image data information transmitted from the outside and provides the clock signal to the digital control module and the scanning control module;
the digital control module comprises a first controller, the first controller receives a clock signal, converts and segments image data information transmitted from the outside into a plurality of pixel signals and transmits the pixel signals to the scanning control module; sampling electric energy output by the power supply module and then outputting a control signal to drive the plurality of display screens to work;
the scanning control module receives the pixel signal output by the first controller, outputs a scanning signal, converts the scanning signal into a line scanning signal, and outputs a driving signal to drive the display screen to work according to the clock signal.
Compared with the prior art, the invention has the beneficial effects that: the invention discloses a scanning driving circuit of a Micro LED and a driving method thereof, comprising the following steps: the clock extraction module extracts a required clock signal from image data information transmitted from the outside, two pulse signals are generated in a signal period respectively, the digital control module is convenient to decode data and reshape and forward the data, the phenomenon that the image data information received by the digital control module is disordered is avoided, accurate data are provided for the LED module, each row of pixels in the display are driven by the scanning control module independently to display, the driving control module is used for ensuring that a plurality of display screens are driven, and when the control over the plurality of display screens is realized, the accurate control over a single display is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a scanning driving circuit of a Micro LED according to an embodiment of the present invention.
Fig. 2 is a schematic connection diagram of a scan control module and a driving control module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a scan driving circuit of a Micro LED according to an embodiment of the present invention.
Fig. 4 is a flowchart of a driving method of a Micro LED according to an embodiment of the present invention.
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.
Referring to fig. 1, fig. 1 is a schematic block diagram illustrating a schematic diagram of a scan driving circuit of a Micro LED according to an embodiment of the present invention, the scan driving circuit of the Micro LED includes: the system comprises a power supply module 1, a clock extraction module 2, a digital control module 3, a scanning control module 4, a driving control module 5 and an LED module 6;
specifically, the power module 1 is used for providing electric energy;
the clock extraction module 2 is connected with the digital control module 3 and the scanning control module 4, and is used for extracting a required clock signal from image data information transmitted from the outside and providing the clock signal to the digital control module 3 and the scanning control module 4;
the digital control module 3 is used for receiving the clock signal, converting and dividing image data information transmitted from the outside into a plurality of pixel signals, transmitting the pixel signals to the scanning control module 4, and outputting a control signal and controlling the work of each module;
the scanning control module 4 is connected with the digital control module 3 and the clock extraction module 2, is used for receiving image data information and the clock signal transmitted from the outside, is used for receiving the control signal output by the digital control module 3 and outputting a scanning signal, is used for converting the scanning signal into a line scanning signal, is connected with the LED module 6, and is used for outputting a driving signal to control each line of pixels in the LED module 6 according to the clock signal and the line scanning signal;
the driving control module 5 and the digital control module 3 are configured to receive the control signal output by the digital control module 3 and improve the driving capability of the control signal, and are configured to perform sampling detection on the output electric energy of the power module 1 and output a voltage signal, and are configured to control the operation of the LED module 6 and maintain the electric energy input to the LED module 6 within a normal range;
and the LED module 6 is used for displaying image data information transmitted from the outside through a plurality of display screens.
In a specific embodiment, the power module 1 may employ a rectifier, a filter circuit, and a DC-DC circuit to process a power supply and output a required power supply, which is not described in detail; the clock extraction module 2 can adopt an input delay circuit and a logic operation circuit to decode and reconstruct data, so as to avoid data disorder; the digital control module 3 can adopt, but is not limited to, microcontrollers such as a digital processing unit (DSP), a Field Programmable Gate Array (FPGA), and the like to receive and convert image data information into a plurality of pixel signals and control each module to do; the scanning control module 4 can adopt a scanning driver and a shift register to realize the processing and the output of scanning signals, and then drive the work of a display screen; the driving control module 5 can adopt a metal-oxide-semiconductor field effect transistor driving circuit to realize the control of a plurality of display screens, and simultaneously adopts an impedance compensation circuit to maintain the electric energy input into the LED module 6 within a normal range; the LED module 6 adopts a display screen formed by a plurality of Micro LEDs.
In this embodiment, referring to fig. 2, the scan control module 4 includes a scan driving unit 401 and a register unit 402;
specifically, the scan driving unit 401 is configured to receive a control signal output by the digital control module 3 and output a scan signal;
a register unit 402, configured to convert the scan signal into a line scan signal, and output a driving signal according to the clock signal;
one end of the scan driving unit 401 and one end of the register unit 402 are both connected to the digital control module 3, and the other end of the scan driving unit 401 is connected to the other end of the register unit 402.
Further, the driving control module 5 includes a driving unit 501, an input detection unit 502, and an impedance compensation unit 503;
specifically, the driving unit 501 is configured to receive a control signal output by the digital control module 3 and improve the driving capability of the control signal;
an input detection unit 502, configured to perform sampling detection on the output electric energy of the power module 1 and output a voltage signal;
an impedance compensation unit 503 for controlling the operation of the LED module 6 and maintaining the power inputted to the LED module 6 within a normal range;
one end of the driving unit 501, one end of the input detection unit 502 and the impedance compensation unit 503 are all connected to the digital control module 3, the other end of the impedance compensation unit 503 and the other end of the driving unit 501 are respectively connected to the LED module 6, and the other end of the input detection module is connected to the power module 1.
In a specific embodiment, the scan driving unit 401 may adopt a scan driver, and the scan driver generates a scan signal to drive a single display screen in the LED module 6 to display a specific image through each row of pixels when each row of pixels is scanned; the register unit 402 may adopt a shift register to convert the scan signal into a line scan signal, and output a driving signal according to the clock signal; the driving unit 501 performs constant current driving on the LED module 6 by using an MOS transistor driving circuit; the input detection unit 502 may employ a resistance voltage division circuit to detect the electric energy output by the power module 1, which is not described in detail; the impedance compensation unit 503 may adopt a triode cooperation control to maintain the power input to the LED module 6 within a normal range.
In this implementation, referring to fig. 3, the clock extraction module 2 includes a first power transistor M1, a first resistor R1, a first power source VCC1, a first operational amplifier OP1, a second resistor R2, a third resistor R3, a feedback power source VREF, a second power transistor M2, a third power transistor M3, a signal source I1, a reference power source VF, a first capacitor C1, a first logic chip J1, a second logic chip J2, a third logic chip J3, a fourth logic chip J4, and a second operational amplifier OP 2;
specifically, the source of the first power transistor M1 is connected to the sources of the first power source VCC1 and the second power transistor M2, the drain of the first power transistor M1 is connected to one end of the first resistor R1 and the non-inverting terminal of the first operational amplifier OP1, the other end of the first resistor R1 and the cathode of the first diode D1 are both grounded, the gate of the first power transistor M1 and the gate of the second power transistor M2 are both connected to the output terminal of the first operational amplifier OP1, the inverting terminal of the first operational amplifier OP1 is connected to one end of the second resistor R2 and the feedback power source VREF through the third resistor R3, the other end of the second resistor R2 is connected to the anode of the first diode D387936, the drain of the second power transistor M2 is connected to the source of the third power transistor M3, one end of the signal source I1 and the non-inverting terminal of the second operational amplifier OP2, the other end of the signal source I4975 is connected to the ground through the first capacitor C1, one end of the second operational amplifier OP1 is connected to the ground, one end of the second operational amplifier OP amplifier J1 is connected to the first output terminal of the second chip J1 and the fourth operational amplifier chip J1 is connected to the output terminal of the second operational amplifier J1, the second end of the fourth logic chip J4 is connected to the other end of the second logic chip J2, the gate of the third power transistor M3 is connected to the third end of the first logic chip J1, and the first end of the first logic chip J1 is connected to the second end of the first logic chip J1 through the third logic chip J3.
Further, the scan driving unit 401 includes a scan driver; the register unit 402 includes a shift register, a level data signal VGH, a fourth power transistor M4, a fifth power transistor M5, a reference voltage VBL, a second capacitor C2, and a sixth power transistor M6; the digital control module 3 comprises a first controller U1;
specifically, a first input end and a second input end of the scan driver are respectively connected to a fourth IO end and a fifth IO end of the first controller U1, an output end of the scan driver is connected to a first input end of the shift register, a second input end of the shift register is connected to a sixth IO end of the first controller U1, a first output end of the shift register is connected to a gate of the fourth power transistor M4, a second output end of the shift register is connected to a gate of the fifth power transistor M5, a source of the fourth power transistor M4 and a drain of the fifth power transistor M5 are both connected to a gate of the sixth power transistor M6 and grounded through a second capacitor C2, a drain of the fourth power transistor M4 is connected to a level data signal VGH, and a source of the fifth power transistor M5 is connected to a reference voltage VBL.
Further, the driving unit 501 includes a third OP3, a fourth resistor R4, a driving transistor VT1, a fifth resistor R5, a third capacitor C3, a first voltage regulator VD1, and a first inductor L1;
specifically, the inverting terminal of the third operational amplifier OP3 is connected to the seventh IO terminal of the first controller U1 and the source of the driving tube VT1 and is connected to the ground terminal through a fifth resistor R5, the non-inverting terminal of the third operational amplifier OP3 is connected to the eighth IO terminal of the first controller U1, the output terminal of the third operational amplifier OP3 is connected to the gate of the driving tube VT1 through a fourth resistor R4, the drain of the driving tube VT1 is connected to the anode of the first voltage-regulator VD1, one end of the third capacitor C3 and one end of the first inductor L1, the other end of the first inductor L1 is connected to the LED module 6, and the cathode of the first voltage-regulator VD1 and the other end of the third capacitor C3 are both connected to the power module 1.
Further, the impedance compensation unit 503 includes a seventh resistor R7, an eighth resistor R8, a first switch tube N1, a ninth resistor R9, a second switch tube N2, a second voltage regulator VD2, a tenth resistor R10, a sixth resistor R6, and a third switch tube N3;
specifically, one end of the seventh resistor R7, one end of the eighth resistor R8, and one end of the ninth resistor R9 are all connected to the base of the second switch tube N2, the other end of the seventh resistor R7 is connected to the tenth IO end of the first controller U1, the other end of the eighth resistor R8, the emitter of the first switch tube N1, and the emitter of the second switch tube N2 are all grounded, the collector of the first switch tube N1 is connected to the other end of the ninth resistor R9, the base of the first switch tube N1 is connected to the anode of the second regulator tube VD2 through the tenth resistor R10, the collector of the second switch tube N2 is connected to the base of the third switch tube N3 through the sixth resistor R6, the emitter of the third switch tube N3 is connected to the power module 1, the collector of the third switch tube N3 is connected to the drain of the sixth power tube M6, and the cathode of the second regulator tube VD2 is connected to the LED module 366.
Further, the LED module 6 includes a first display screen and a second diode D2;
specifically, the first end of the first display screen is connected to the source of the sixth power transistor M6, the second end of the first display screen is connected to the cathode of the second voltage regulator VD2 and the anode of the second diode D2, and the cathode of the second diode D2 is connected to the other end of the first inductor L1.
In a specific embodiment, the first controller U1 may be a TMS320F28027 chip; the driving tube VT1 can be an N-channel enhanced MOS tube; the first power tube M1, the second power tube M2, the third power tube M3, the fourth power tube M4, the fifth power tube M5 and the sixth power tube M6 may all be junction field effect tubes; the first switch tube N1, the second switch tube N2 and the third switch tube N3 can all adopt NPN triodes; the first operational amplifier OP1, the second operational amplifier OP2 and the third operational amplifier OP3 can all adopt OP07 series operational amplifiers; the first logic chip J1 and the second logic chip J2 can select an AND gate logic circuit; the third logic chip J3 and the fourth logic chip J4 may be implemented by using a delay unit, and the specific model is not limited.
In this embodiment, referring to fig. 4, a driving method of a Micro LED includes:
s1: the clock extraction module extracts a required clock signal from image data information transmitted from the outside and provides the clock signal to the digital control module and the scanning control module;
s2: the digital control module comprises a first controller, the first controller receives a clock signal, converts and divides image data information transmitted from the outside into a plurality of pixel signals and transmits the pixel signals to the scanning control module; sampling electric energy output by the power supply module and then outputting control signals to drive the plurality of first display screens to work;
s3: the scanning control module receives the pixel signal output by the first controller, outputs a scanning signal, converts the scanning signal into a line scanning signal, and outputs a driving signal to drive the first display screen to work according to the clock signal.
The invention relates to a scanning drive circuit of Micro LED and a driving method thereof, wherein a power supply module 1 provides required electric energy, a clock extraction module 2 extracts required clock signals from image data information transmitted from the outside to respectively generate two pulse signals in a signal period, specifically, after a first IO end of a first controller U1 outputs signals, a rising edge is detected, the signals are decoded into binary codes and jump between the two pulse signals to complete signal reconstruction, a digital control module 3 can conveniently realize data decoding and data reshaping and forwarding, the image data information received by the digital control module 3 is prevented from being disordered and accurate data is provided for an LED module 6, the first controller U1 receives the clock signals and converts the image data information transmitted from the outside into a plurality of pixel signals and transmits the pixel signals to a scanning control module 4, the scanning control module 4 converts the scanning signals into line scanning signals, meanwhile, a driving signal is output according to a clock signal and a line scanning signal to control the LED module to display each line of pixels, so that the scanning control module 4 independently drives each line of pixels in the display to display, the driving control module 5 controls the driving tube VT1 to control a plurality of display screens to work, the scanning control module 4 provides scanning signals in one frame, after the voltages of the display screens are written, the scanning voltages are output one by one in the remaining time of one frame, and the light-emitting time in an unused period can be obtained by dividing the difference value of the scanning voltages and the data voltages by the scanning speed in one frame, wherein the impedance compensation unit 503 maintains the electric energy input into the LED module 6 in a normal range, and the normal work of the LED module 6 is ensured.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a Micro LED's scanning drive circuit which characterized in that:
this Micro LED's scanning drive circuit includes: the system comprises a power supply module, a clock extraction module, a digital control module, a scanning control module, a driving control module and an LED module;
the power supply module is used for providing electric energy;
the clock extraction module is connected with the digital control module and the scanning control module and used for extracting a required clock signal from image data information transmitted from the outside and providing the clock signal to the digital control module and the scanning control module;
the digital control module is used for receiving the clock signal, converting and dividing image data information transmitted from the outside into a plurality of pixel signals, transmitting the pixel signals to the scanning control module, and outputting a control signal and controlling the work of each module;
the scanning control module is connected with the digital control module and the clock extraction module, is used for receiving image data information and the clock signal transmitted from the outside, receiving the control signal output by the digital control module and outputting a scanning signal, is used for converting the scanning signal into a line scanning signal, is connected with the LED module, and is used for outputting a driving signal to control each line of pixels in the LED module according to the clock signal and the line scanning signal;
the driving control module and the digital control module are used for receiving the control signal output by the digital control module and improving the driving capability of the control signal, and are used for sampling and detecting the output electric energy of the power supply module and outputting a voltage signal, and are used for controlling the work of the LED module and maintaining the electric energy input into the LED module within a normal range;
and the LED module is used for displaying image data information transmitted from the outside through a plurality of display screens.
2. A scan driving circuit of a Micro LED according to claim 1, wherein the clock extraction module comprises a first power transistor, a first resistor, a first power supply, a first operational amplifier, a second resistor, a third resistor, a feedback power supply, a second power transistor, a third power transistor, a signal source, a reference power supply, a first capacitor, a first logic chip, a second logic chip, a third logic chip, a fourth logic chip and a second operational amplifier;
the source electrode of the first power tube is connected with a first power supply and the source electrode of a second power tube, the drain electrode of the first power tube is connected with one end of a first resistor and the in-phase end of a first operational amplifier, the other end of the first resistor and the cathode of a first diode are both grounded, the grid electrode of the first power tube and the grid electrode of a second power tube are both connected with the output end of the first operational amplifier, the inverting end of the first operational amplifier is connected with one end of a second resistor and connected with a feedback power supply through a third resistor, the other end of the second resistor is connected with the anode of a first diode, the drain electrode of the second power tube is connected with the source electrode of a third power tube, one end of a signal source and the in-phase end of the second operational amplifier, the other end of the signal source is grounded through a first capacitor, the inverting end of the second operational amplifier is grounded through a reference power supply, the output end of the second operational amplifier is connected with the first end of a fourth logic chip and one end of the second logic chip, the second end of the fourth logic chip is connected with the other end of the second logic chip, the grid electrode of the third power tube is connected with the third end of the first logic chip, and the first end of the first logic chip is connected with the second end of the first logic chip through the third logic chip.
3. A scanning driving circuit of a Micro LED as claimed in claim 2, wherein the scanning control module comprises a scanning driving unit and a register unit;
the scanning driving unit is used for receiving the control signal output by the digital control module and outputting a scanning signal;
the register unit is used for converting the scanning signals into line scanning signals and outputting driving signals according to the clock signals;
one end of the scanning driving unit and one end of the register unit are both connected with the digital control module, and the other end of the scanning driving unit is connected with the other end of the register unit.
4. The scan driving circuit of a Micro LED of claim 3, wherein the scan driving unit includes a scan driver; the register unit comprises a shift register, a level data signal, a fourth power tube, a fifth power tube, a reference voltage, a second capacitor and a sixth power tube; the digital control module comprises a first controller;
the first input end and the second input end of the scanning driver are respectively connected with the fourth IO end and the fifth IO end of the first controller, the output end of the scanning driver is connected with the first input end of the shift register, the second input end of the shift register is connected with the sixth IO end of the first controller, the first output end of the shift register is connected with the grid electrode of the fourth power tube, the second output end of the shift register is connected with the grid electrode of the fifth power tube, the source electrode of the fourth power tube and the drain electrode of the fifth power tube are both connected with the grid electrode of the sixth power tube and grounded through the second capacitor, the drain electrode of the fourth power tube is connected with a level data signal, and the source electrode of the fifth power tube is connected with a reference voltage.
5. A scanning driving circuit of a Micro LED according to claim 4, wherein the driving control module comprises a driving unit, an input detection unit, an impedance compensation unit;
the driving unit is used for receiving the control signal output by the digital control module and improving the driving capability of the control signal;
the input detection unit is used for sampling and detecting the output electric energy of the power supply module and outputting a voltage signal;
the impedance compensation unit is used for controlling the work of the LED module and maintaining the electric energy input into the LED module within a normal range;
one end of the driving unit, one end of the input detection unit and the impedance compensation unit are connected with the digital control module, the other end of the impedance compensation unit and the other end of the driving unit are respectively connected with the LED module, and the other end of the input detection module is connected to the power supply module.
6. A scanning driving circuit of a Micro LED according to claim 5, wherein the driving unit comprises a third operational amplifier, a fourth resistor, a driving tube, a fifth resistor, a third capacitor, a first voltage regulator tube and a first inductor;
the inverting terminal of the third operational amplifier is connected with the seventh IO terminal of the first controller and the source electrode of the driving tube and is connected with the ground terminal through a fifth resistor, the non-inverting terminal of the third operational amplifier is connected with the eighth IO terminal of the first controller, the output terminal of the third operational amplifier is connected with the grid electrode of the driving tube through a fourth resistor, the drain electrode of the driving tube is connected with the anode of the first voltage-regulator tube, one end of a third capacitor and one end of a first inductor, the other end of the first inductor is connected with the LED module, and the cathode of the first voltage-regulator tube and the other end of the third capacitor are connected with the power module.
7. A scanning driving circuit of a Micro LED as claimed in claim 6, wherein the impedance compensation unit comprises a seventh resistor, an eighth resistor, a first switch tube, a ninth resistor, a second switch tube, a second regulator tube, a tenth resistor, a sixth resistor and a third switch tube;
one end of the seventh resistor, one end of the eighth resistor and one end of the ninth resistor are connected with the base of the second switch tube, the other end of the seventh resistor is connected with the tenth IO end of the first controller, the other end of the eighth resistor, the emitter of the first switch tube and the emitter of the second switch tube are all grounded, the collector of the first switch tube is connected with the other end of the ninth resistor, the base of the first switch tube is connected with the anode of the second voltage-stabilizing tube through the tenth resistor, the collector of the second switch tube is connected with the base of the third switch tube through the sixth resistor, the emitter of the third switch tube is connected with the power module, the collector of the third switch tube is connected with the drain electrode of the sixth power tube, and the cathode of the second voltage-stabilizing tube is connected with the LED module.
8. A scanning driving circuit for a Micro LED as claimed in claim 7, wherein the LED module includes a first display screen and a second diode;
the first end of the first display screen is connected with the source electrode of the sixth power tube, the second end of the first display screen is connected with the cathode of the second voltage-regulator tube and the anode of the second diode, and the cathode of the second diode is connected with the other end of the first inductor.
9. A method for driving a Micro LED, comprising:
the clock extraction module extracts a required clock signal from image data information transmitted from the outside and provides the clock signal to the digital control module and the scanning control module;
the digital control module comprises a first controller, the first controller receives a clock signal, converts and divides image data information transmitted from the outside into a plurality of pixel signals and transmits the pixel signals to the scanning control module; sampling electric energy output by the power supply module and then outputting control signals to drive the plurality of first display screens to work;
the scanning control module receives the pixel signal output by the first controller, outputs a scanning signal, converts the scanning signal into a line scanning signal, and outputs a driving signal to drive the first display screen to work according to the clock signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372443.8A CN114464126B (en) | 2022-04-11 | 2022-04-11 | Scanning driving circuit of Micro LED and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372443.8A CN114464126B (en) | 2022-04-11 | 2022-04-11 | Scanning driving circuit of Micro LED and driving method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN114464126A CN114464126A (en) | 2022-05-10 |
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| US5699124A (en) * | 1995-06-28 | 1997-12-16 | General Instrument Corporation Of Delaware | Bandwidth efficient communication of user data in digital television data stream |
| US7259734B2 (en) * | 2003-02-13 | 2007-08-21 | Jae-Jin Lim | Multi-scanning control process and LED displaying device |
| CN104091558B (en) * | 2013-04-01 | 2017-03-01 | 香港理工大学 | The driving method of LED display panel and system |
| CN110675816A (en) * | 2019-07-31 | 2020-01-10 | 华为技术有限公司 | Display module, control method thereof, display driving circuit and electronic equipment |
| CN110751924A (en) * | 2019-12-03 | 2020-02-04 | 深圳市思坦科技有限公司 | Micro-LED display screen controlled in split screen mode |
| CN111063297A (en) * | 2020-02-22 | 2020-04-24 | 禹创半导体(广州)有限公司 | Miniature micro LED display device |
| CN112652267B (en) * | 2020-02-26 | 2021-09-21 | 中国电子科技集团公司第五十五研究所 | Rolling screen display digital driving method for active Micro-LED display screen |
| CN113823207A (en) * | 2020-06-18 | 2021-12-21 | 华为技术有限公司 | Drive control method and related equipment |
| CN112951151B (en) * | 2021-02-10 | 2022-12-02 | 华源智信半导体(深圳)有限公司 | MLED driver, MLED display driving system and driving method thereof |
| CN114089936A (en) * | 2021-11-03 | 2022-02-25 | 深圳Tcl新技术有限公司 | Display drive control method, device, equipment and storage medium |
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