Low cost matrix light control system

Abstract

The utility model relates to a low cost matrix light control system, include: LED matrix, including a plurality of LED lamp pearl in row and column arrangement, row control module, including switch group, for time -sharing conduction LED matrix's each row, column control module, constitute by at least one shift register, through serial data input control LED matrix's column signal, control unit, adopt MCU singlechip, for generating row / column control signal and through time -sharing scanning drive shift register and switch, control LED matrix's lighting and extinguishing, power module provides stable power supply for LED matrix and shift register, time -sharing control switch module, will LED matrix's column group, multiplex shift register output, through time slice switching control different column group. Compared with prior art, the utility model has the advantages of cost reduction, resource efficient utilization, flexible expansion, dynamic display optimization, wide application scene etc.

Description

Technical Field

[0001] This utility model relates to the field of automotive interior and exterior technology, and in particular to a low-cost matrix lighting control system. Background Technology

[0002] Currently, automotive matrix lights typically use matrix chips to control the on / off state of the LED beads. Matrix LEDs: With the development of automotive intelligence, automotive exterior matrix lights are a widely used lighting system. They achieve complex lighting effects, such as dynamic lighting displays and human-vehicle interaction, through a matrix arrangement of LED beads. Existing automotive exterior matrix lights typically use matrix chips to control the on / off state of the LED beads. While these chips can precisely control the state of each LED bead, they are costly and may lead to resource waste in some application scenarios.

[0003] Patent CN202420069410.0 discloses a matrix lamp whose power input is controlled by an ideal diode. The power input is controlled by an ideal diode power supply control module, which supplies power to the SBC module. The SBC module directly receives the wake-up signal to achieve power management, allowing the main control module to be powered on first. Furthermore, the ideal diode power supply control module can achieve overvoltage protection and reverse connection protection, exhibiting high integration. However, it suffers from high static power consumption and insufficient communication reliability.

[0004] Controlling a large number of LEDs using row and column scanning presents several challenges: 1. High cost: Matrix chips are typically expensive, increasing the overall cost of automotive exterior matrix lights. 2. Limited flexibility: The functions of matrix chips are relatively fixed, making it difficult to adjust them flexibly for different application scenarios. 3. Resource waste: In some simple lighting display needs, the high-performance functions of matrix chips, such as dimming and diagnostics, may not be fully utilized, leading to resource waste. The technical challenges to be addressed are: 1. Cost reduction: Reducing reliance on expensive matrix chips through alternative solutions to lower the cost of automotive exterior matrix lights. 2. Increased flexibility: Providing a lighting control solution that can be flexibly adjusted according to specific needs. 3. Optimized resource utilization: Avoiding resource waste of high-performance chips in low-demand scenarios. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-cost matrix lighting control system that significantly reduces costs, utilizes resources efficiently, is flexible and scalable, optimizes dynamic display, and has a wide range of applications.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] External matrix LED control based on shift registers, and can be combined with switches for row and column scanning control to further reduce the use of shift registers and lower costs.

[0008] This utility model provides a low-cost matrix lighting control system, including:

[0009] An LED matrix consists of multiple LED beads arranged in rows and columns;

[0010] The row control module includes a switch group for time-division multiplexing each row of the LED matrix;

[0011] The column control module, consisting of at least one shift register, controls the column signals of the LED matrix via serial data input;

[0012] The control unit, using an MCU (Microcontroller Unit), generates row / column control signals and drives shift registers and switches via time-division scanning to control the lighting and extinguishing of the LED matrix. By controlling the row and column signals of the LED matrix, independent control of each LED is achieved. Specifically, only one row of LEDs is lit at a time; by rapidly switching the row signals, all rows are lit sequentially, creating a dynamic visual effect.

[0013] The power module provides a stable power supply to the LED matrix and shift register;

[0014] The time-sharing control switch module groups the columns of the LED matrix, multiplexes the output of the shift register, and controls different column groups by switching time slices.

[0015] Furthermore, the number of switches in the row control module is equal to the number of rows in the LED matrix, with each row corresponding to an independent switch.

[0016] Furthermore, the shift register of the column control module receives control signals from the MCU microcontroller via a serial data line. Driven by a clock signal, its parallel output is connected to the column lines of the LED matrix. The microcontroller shifts control data into the shift register one by one via the serial data line.

[0017] Furthermore, the MCU microcontroller controls the switch via output I / O, or communicates with the switch integrated chip via serial port to control the column signals respectively.

[0018] Furthermore, the time-sharing control switch module dynamically switches time slices, enabling the output of a single shift register to control multiple rows of LED beads at different times.

[0019] Furthermore, the control unit utilizes the persistence of vision effect to achieve a dynamic display effect by rapidly switching row / column signals.

[0020] Furthermore, the number of rows and columns of the LED matrix can be expanded to accommodate LED arrays of 128×4 or larger.

[0021] Furthermore, the shift register is a 74HC595 chip.

[0022] Furthermore, the switch is a MOS switch, specifically a P-channel MOS.

[0023] Furthermore, the parallel output of the shift register is connected to the column lines of the LED matrix through a current-limiting resistor, and each output drives a column of LED beads.

[0024] The system control method is as follows:

[0025] Initialize the MCU, shift register, and MOS switches; set all row and column signals to the off state.

[0026] Generate column control data for the preset display mode and input it serially into the shift register;

[0027] The microcontroller controls the shift register to light up each row sequentially.

[0028] When each row is lit, the microcontroller controls the corresponding column signal to be lit or turned off as needed via MOS.

[0029] Dynamic display is achieved through cyclic scanning. By rapidly switching row and column signals, the entire LED matrix achieves a dynamic display effect. Utilizing the persistence of vision effect, even if each row is only lit for a very short time, the human eye will perceive the complete image of the entire matrix.

[0030] The column control data is multiplexed through time-slice groups, and the output of a single shift register controls multiple columns of LEDs at different times.

[0031] The microcontroller generates control data according to the preset display mode; it shifts the control data into the shift register one by one through the serial data line; it provides a clock signal to drive the latching operation of the shift register, ensuring that the data can be correctly converted from serial input to parallel output; the shift register stores the received data and latches the output at the appropriate time to control the column signals of the LED matrix.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) Significantly reduced cost: Replacing high-priced matrix chips with shift registers reduces the number of chips and wiring complexity.

[0034] (2) Efficient use of resources: Time-division multiplexing technology enables a single shift register to control multiple columns of LEDs, avoiding redundant configuration of high-performance chips.

[0035] (3) Flexible and scalable: The number of rows and columns can be freely adjusted to adapt to LED matrices of different sizes (such as 128×4 or larger).

[0036] (4) Dynamic display optimization: Based on the visual persistence effect, a fast scanning technology is used to achieve smooth dynamic lighting effects.

[0037] (5) Wide range of applications: Applicable to automotive interior and exterior trim (grille lights, ISD, etc.) and other fields that require low-cost matrix lighting. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a low-cost matrix lighting control system.

[0039] Reference numerals: 1-LED matrix; 2-row control module; 3-column control module; 4-control unit; 5-power module. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0041] Example 1

[0042] This embodiment provides a low-cost matrix lighting control system, such as... Figure 1 As shown, it includes:

[0043] LED matrix 1 includes multiple LED beads arranged in rows and columns;

[0044] The row control module 2 includes a group of MOS switches for time-division multiplexing each row of the LED matrix 1; for a 128×4 LED matrix, 4 MOS switches are required to control the signals of 4 rows.

[0045] The column control module 3 consists of at least one shift register, which controls the column signals of the LED matrix through serial data input; for a 128×4 LED matrix, four shift registers are needed to control the signals of 16 columns.

[0046] Control unit 4, using an MCU microcontroller, generates row / column control signals and drives the shift register and MOS switch via time-division scanning to control the lighting and extinguishing of LED matrix 1. By controlling the row and column signals of LED matrix 1, it achieves independent control of each LED. Specifically, only one row of LEDs is lit at a time, and by rapidly switching the row signals, all rows are lit sequentially, creating a dynamic visual effect.

[0047] Power module 5 provides stable power to LED matrix 1 and shift register;

[0048] The time-sharing control switch module groups the columns of LED matrix 1, multiplexes the output of the shift register, and controls different column groups by switching time slices.

[0049] Furthermore, the number of MOS switches in the row control module 2 is equal to the number of rows in the LED matrix, with each row corresponding to an independent MOS switch.

[0050] Furthermore, the shift register of the column control module 3 receives control signals from the MCU microcontroller via a serial data line. Driven by a clock signal, its parallel output is connected to the column lines of the LED matrix. The microcontroller shifts control data into the shift register one by one via the serial data line.

[0051] Furthermore, the MCU microcontroller controls the MOS switches through output I / O, or communicates with the MOS integrated chip through a serial port to control the column signals respectively.

[0052] Furthermore, the time-sharing control switch module dynamically switches time slices, enabling the output of a single shift register to control multiple rows of LED beads at different times.

[0053] Furthermore, the control unit 4 utilizes the persistence of vision effect to achieve a dynamic display effect by rapidly switching row / column signals.

[0054] Furthermore, the number of rows and columns of the LED matrix 1 can be expanded to accommodate LED arrays of 128×4 or larger.

[0055] Furthermore, the shift register is a 74HC595 chip.

[0056] Furthermore, the MOS switch is a P-channel MOS.

[0057] Furthermore, the parallel output of the shift register is connected to the column line of LED matrix 1 through a current-limiting resistor, and each output drives a column of LED beads.

[0058] The system control method is as follows:

[0059] Initialize the MCU, shift register, and MOS switches; set all row and column signals to the off state.

[0060] Generate column control data for the preset display mode and input it serially into the shift register;

[0061] The microcontroller controls a shift register to sequentially light up each row. For a 128×4 matrix, the row LEDs are lit sequentially.

[0062] When each row is lit, the microcontroller controls the corresponding column signal to turn on or off as needed via MOS. If it is necessary to light up the third LED in the first row, the signal of the third column will be set to high level (lit) when the MOS of the first row is turned on.

[0063] Dynamic display is achieved through cyclic scanning. By rapidly switching row and column signals, the entire LED matrix achieves a dynamic display effect. Utilizing the persistence of vision effect, even if each row is only lit for a very short time, the human eye will perceive the complete image of the entire matrix.

[0064] The column control data is multiplexed through time-slice groups, and the output of a single shift register controls multiple columns of LEDs at different times.

[0065] The microcontroller generates control data according to the preset display mode; it shifts the control data into the shift register one by one through the serial data line; it provides a clock signal to drive the latching operation of the shift register, ensuring that the data can be correctly converted from serial input to parallel output; the shift register stores the received data and latches the output at the appropriate time to control the column signals of the LED matrix.

[0066] The products used in this embodiment can be exterior lighting, including grille lights, logo lights, trim lights, taillights, and any parts that require a light-emitting effect, such as interior ambient lighting, side door lights, ISD lights, bumper lights, etc.

[0067] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0068] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A low-cost matrix lighting control system, characterized in that, include: An LED matrix (1) includes multiple LED beads arranged in rows and columns; The row control module (2) includes a switch group for time-division turning on each row of the LED matrix (1); The column control module (3) consists of at least one shift register and controls the column signals of the LED matrix through serial data input; The control unit (4) uses an MCU microcontroller to generate row / column control signals and drive the shift register and switch through time-division scanning to control the lighting and extinguishing of the LED matrix (1); The power supply module (5) provides a stable power supply for the LED matrix (1) and the shift register; The time-sharing control switch module groups the columns of the LED matrix (1), multiplexes the output of the shift register, and controls different column groups by switching time slices.

2. The low-cost matrix lighting control system according to claim 1, characterized in that, The number of switches in the row control module (2) is equal to the number of rows in the LED matrix, with each row corresponding to an independent switch.

3. The low-cost matrix lighting control system according to claim 1, characterized in that, The shift register of the column control module (3) receives the control signal from the MCU microcontroller through the serial data line, and the parallel output terminal is connected to the column line of the LED matrix (1). The microcontroller shifts the control data into the shift register one by one through the serial data line.

4. The low-cost matrix lighting control system according to claim 1, characterized in that, The MCU microcontroller controls the switch through output I / O, or communicates with the switch integrated chip through a serial port to control the column signals respectively.

5. A low-cost matrix lighting control system according to claim 1, characterized in that, The time-sharing control switch module dynamically switches time slices, enabling the output of a single shift register to control multiple rows of LED beads at different times.

6. A low-cost matrix lighting control system according to claim 1, characterized in that, The control unit (4) achieves dynamic display effects by rapidly switching row / column signals.

7. A low-cost matrix lighting control system according to claim 1, characterized in that, The number of rows and columns of the LED matrix (1) is scalable, suitable for LED arrays of 128×4 or larger.

8. A low-cost matrix lighting control system according to claim 1, characterized in that, The shift register is a 74HC595 chip.

9. A low-cost matrix lighting control system according to claim 1, characterized in that, The switch is a MOS switch, and the MOS switch is a P-channel MOS.

10. A low-cost matrix lighting control system according to claim 1, characterized in that, The parallel output of the shift register is connected to the column line of the LED matrix (1) through a current-limiting resistor, and each output drives a column of LED beads.

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