CN219421107U - Multi-pixel LED control system for automobile lamp - Google Patents
Multi-pixel LED control system for automobile lamp Download PDFInfo
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- CN219421107U CN219421107U CN202223551304.6U CN202223551304U CN219421107U CN 219421107 U CN219421107 U CN 219421107U CN 202223551304 U CN202223551304 U CN 202223551304U CN 219421107 U CN219421107 U CN 219421107U
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Abstract
The utility model discloses a multi-pixel LED control system for an automobile lamp, which comprises: the input end of the constant current module is connected with a power supply at the vehicle body end; the input end of the control module is connected with the vehicle body end and is used for acquiring a vehicle body instruction; the input end of the channel switch module is connected with the constant current module and the control module, the output end of the channel switch module is connected with the LED lamp groups, and the control module closes the channel switch module according to the vehicle body instruction so that the LED lamp groups are communicated with the constant current module; the input ends of the matrix switch modules are connected with the control module, the output ends of the matrix switch modules are connected with the LED lamp groups, and the control module controls the matrix switch modules according to the vehicle body instructions so as to adjust the brightness of the LED lamp groups. The utility model combines the channel switch module, fully utilizes the carrying capacity of the constant current module, realizes independent control of enough LED particles, has simple structure, greatly reduces the area of a driver, reduces the number of the constant current modules, reduces the EMC difficulty of the multi-pixel car lamp module, and has lower cost.
Description
Technical Field
The utility model belongs to the technical field of automobile illumination, and particularly relates to a multi-pixel LED control system for an automobile lamp.
Background
Automotive lighting plays an important role in automotive safety, and in recent years, pixel-type LED headlamps (also called LED lamp groups) are increasingly used in many middle-high-end vehicle types. After the LED lamp group is adopted by the automobile front lamp, the whole or separate control adjustment can be carried out on the power supply of a plurality of or a plurality of groups of LEDs, so that the glare interference on drivers of oncoming vehicles in the scenes of meeting vehicles at night and the like can be effectively reduced.
The anti-dazzle effect of the existing multi-pixel LED headlight (or matrix headlight) is affected by the number of LED particles which can be controlled and regulated independently, and each LED which can be regulated independently is regarded as one pixel, for example, a matrix headlight consisting of 100 LEDs, so that the LED headlight has 100 pixels. Generally, the more pixels, the better the antiglare effect. So the number of LED particles of the multi-pixel LED headlight gradually increases from within 30 conventional ones to 96 pixels, 100 pixels or even higher ones. The larger LED particle number means that more DCDC modules are needed for driving, and the conventional driving mode commonly used at present has the problems of insufficient utilization of a DCDC driving circuit, overlarge driver, higher cost and the like. For example, a 100-pixel ADB headlight typically requires nine DCDC constant current channel drives, which has a significant limitation in developing a 100-pixel ADB.
Disclosure of Invention
In order to overcome the technical defects, the utility model provides a multi-pixel LED control system for an automobile lamp, which can reduce the cost of the LED control system.
In order to solve the problems, the utility model is realized according to the following technical scheme:
a multi-pixel LED control system for an automotive lamp, comprising:
the input end of the constant current module is connected with a power supply at the vehicle body end;
the input end of the control module is connected with the vehicle body end and the constant current module, and is used for acquiring a vehicle body instruction and opening or closing the constant current module according to the vehicle body instruction;
the input end of the channel switch module is connected with the constant current module and the control module, the output end of the channel switch module is connected with a plurality of LED lamp groups, and the control module closes the channel switch module according to the vehicle body instruction so as to enable the LED lamp groups to be communicated with the constant current module;
the input ends of the matrix switch modules are connected with the control module, the output ends of the matrix switch modules are connected with the LED lamp groups, and the control module controls the matrix switch modules according to the vehicle body instructions so as to adjust the brightness of the LED lamp groups.
As a further improvement of the present utility model, the channel switch module includes: the LED lamp comprises a plurality of channel switch circuits which are arranged in parallel, wherein the input ends of the channel switch circuits are connected with the constant current module and the control module, and the output ends of the channel switch circuits are connected with at least one group of LED lamp groups.
As a further development of the utility model, adjacent LED lamp groups are connected in parallel or in series.
As a further improvement of the present utility model, the channel switching circuit includes: the first transistor, the second transistor, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the diode and the transistor;
the output end of the constant current module is connected with the source electrode of the transistor, the drain electrode of the transistor is connected with the anode of the LED lamp group, the first resistor is connected between the source electrode and the grid electrode of the transistor, and the diode is connected between the source electrode and the grid electrode of the transistor;
the output end of the control module is connected with the collector electrode and the base electrode of the first triode through the second resistor, the emitter electrode of the first triode is grounded through the third resistor, the base electrode of the first triode is grounded through the fourth resistor, the base electrode of the first triode is connected with the base electrode of the second triode, the emitter electrode of the second triode is grounded through the fifth resistor, and the collector electrode of the second triode is connected with the grid electrode of the transistor through the sixth resistor.
As a further improvement of the present utility model, the matrix switch module includes: and the port of the integrated switch is respectively connected with the anode and the cathode of the LED lamp in the LED lamp group.
As a further improvement of the present utility model, the present utility model further includes: and the filtering anti-reflection module is connected between the vehicle body end and the constant current module.
As a further improvement of the present utility model, the present utility model further includes: and the first communication module is connected between the vehicle body end and the control module.
As a further improvement of the present utility model, the present utility model further includes: and the second communication module is connected between the control module and the matrix switch module.
As a further improvement of the present utility model, the present utility model further includes: and the input end of the voltage stabilizing module is connected with the filtering anti-reverse module, and the output end of the voltage stabilizing module is connected with the control module.
Compared with the prior art, the utility model has the following beneficial effects: the utility model combines the channel switch module, fully utilizes the carrying capacity of the constant current module, realizes independent control of enough LED particles, has simple structure, greatly reduces the area of a driver, reduces the number of the constant current modules, reduces the EMC difficulty of the multi-pixel car lamp module, and has lower cost.
Drawings
The utility model is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of a multi-pixel LED control system according to the present utility model;
FIG. 2 is a schematic diagram illustrating connection of LED lamp sets according to the present utility model;
FIG. 3 is a schematic diagram of a channel switch circuit according to the present utility model;
FIG. 4 is a schematic diagram of another structure of the channel switch circuit according to the present utility model;
fig. 5 is a schematic structural diagram of the integrated switch according to the present utility model.
Marking: 1. a constant current module; 2. a control module; 3. a channel switch module; 31. a channel switching circuit; 4. a matrix switch module; 41. an integrated switch; 5. a filtering anti-reflection module; 6. CAN/LIN communication module; 7. a CAN communication module; 8. a voltage stabilizing module; 100. a vehicle body end; 200. an LED lamp set.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
The utility model provides a multi-pixel LED control system for an automobile lamp, as shown in FIG. 1, comprising: the system comprises a constant current module 1, a control module 2, a channel switch module 3 and a plurality of matrix switch modules 4, wherein the input end of the constant current module 1 is connected with a power supply of a vehicle body end 100; the input end of the control module 2 is connected with the vehicle body end 100 and the constant current module 1, and is used for acquiring a vehicle body instruction and opening or closing the constant current module 1 according to the vehicle body instruction; the power input end of the channel switch module 3 is connected with the output end of the constant current module 1, the signal input end of the channel switch module 3 is connected with the output end of the control module 2, the output end is connected with a plurality of LED lamp groups 200, and the control module 2 closes the channel switch module 3 according to a vehicle body instruction so that the LED lamp groups 200 are communicated with the constant current module 1; the input end of the matrix switch module 4 is connected with the control module 2, the output end of the matrix switch module is connected with the LED lamp group 200, and the control module 2 controls the matrix switch module 4 according to the vehicle body instruction so as to adjust the brightness of the LED lamp group 200.
As shown in fig. 2, adjacent LED lamp groups 200 are connected in parallel or in series. In one embodiment, nine LED lamp groups are arranged, and 100 pixel points are divided into 9 independent illumination areas from LED lamp group #1 to LED lamp group #9 according to the requirement of the road condition illumination range. The LED lamp set #7 is formed by connecting 8 LEDs in series, and the current is 0.3A; the LED lamp sets #1 and #4 are respectively formed by connecting 10 LEDs in series, and the current is 0.06A; the LED lamp sets #2, #3, #5 and #9 are all formed by connecting 12 LEDs in series, and the current is 0.1A; the LED lamp sets #6 and #8 are all formed by connecting 12 LEDs in series, and the current is 0.2A.
Further, the channel switch module 3 includes: the LED lamp set comprises a plurality of channel switch circuits 31 which are arranged in parallel, wherein the input ends of the channel switch circuits 31 are connected with the constant current module 1 and the control module 2, and the output ends of the channel switch circuits are connected with at least one group of LED lamp sets 200.
As shown in fig. 3 and 4, the channel switching circuit 31 includes: the transistor comprises a first triode Q2, a second triode Q3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a diode Z2 and a transistor Q1; the output end of the constant current module 1 is connected with the source electrode of the transistor Q1, the drain electrode of the transistor Q1 is connected with the anode of the LED lamp set 200, the first resistor R1 is connected between the source electrode and the grid electrode of the transistor Q1, and the diode Z1 is connected between the source electrode and the grid electrode of the transistor Q1; the output end of the control module 2 is connected with the collector and the base of the first triode Q2 through a second resistor R2, the emitter of the first triode Q2 is grounded through a third resistor R3, the base of the first triode Q2 is grounded through a fourth resistor R4, the base of the first triode Q2 is connected with the base of the second triode Q3, the emitter of the second triode Q3 is grounded through a fifth resistor R5, and the collector of the second triode Q3 is connected with the grid of the transistor Q1 through a sixth resistor R6. The transistor is a PMOS switching transistor.
As shown in fig. 5, the matrix switch module 4 includes: and the port of the integrated switch 41 is respectively connected with the anode and the cathode of the LED lamps in the LED lamp group 200.
In order to enable stable operation of the overall system, in some embodiments, it further comprises: the filtering anti-reflection module 5 is connected between the vehicle body end 100 and the constant current module 1.
Further, the method further comprises the following steps: the first communication module is connected between the vehicle body end 100 and the control module 2, the first communication module is a CAN/LIN communication module 6, and the signal end of the matrix switch module 4 obtains a vehicle body instruction from the control module 2 through the CAN/LIN communication module 6.
In some embodiments, further comprising: and the second communication module is connected between the control module 2 and the matrix switch module 4, and is a CAN communication module 7.
As depicted in fig. 1, in some embodiments, further comprising: the input end of the voltage stabilizing module 8 is connected with the filtering anti-reflection module 5, the output end of the voltage stabilizing module 8 is connected with the power supply end of the control module 2 and is used for providing a stable power supply for the control module 2, and in addition, the output end of the voltage stabilizing module 8 is also connected with the power supply end of the matrix switch module 4, the power supply end of the CAN/LIN communication module 6 and the power supply end of the CAN communication module 7 and is used for providing a stable power supply for the matrix switch module 4, the CAN/LIN communication module 6 and the CAN communication module 7.
The utility model will be further explained in connection with specific embodiments as follows:
the power supply of the vehicle body end 100 supplies power to the follow-up constant current module 11 and the voltage stabilizing module 8 through the filtering anti-reverse module 55, and the control module 2 controls the channel switch circuit 31 of the corresponding constant current module 1 to be turned on and off after receiving a vehicle body instruction (such as a driving mode instruction) of the vehicle body end 100 through the CAN/LIN communication module 6 so as to realize the lighting of the LED lamp group; the dynamic effect of the corresponding LED lamp group is realized through the on-off of the matrix switch module 4.
The anodes of the LED lamp group #1 and the LED lamp group #4 are connected in parallel, and the anode of the LED lamp group #1 and the anode of the LED lamp group #7 are connected with the cathode of the LED lamp group #7, and the anode of the LED lamp group #7 is connected with the drain electrode of the PMOS switch tube Q1 of the channel switch circuit 31. The LED lamp group #9 and #5 are connected in parallel with the common anode and connected with the drain electrode of the PMOS switch tube Q1 of the channel switch circuit 31; the LED lamp group #2 and #8 are connected in parallel with the common anode and connected with the drain electrode of the PMOS switch tube Q1 of the channel switch circuit 31; the LED lamp group #3 and #6 are connected in parallel with the common anode and connected to the drain of the PMOS switching transistor Q1 of the channel switching circuit 31. The source electrode of the PMOS switching tube Q1 in the two-channel switching circuit 31 is connected with the output end LED_CH1 of the first-channel constant current module 1; the source electrode of the PMOS switching tube Q1 in the other two paths of channel switching circuits 31 is connected with the output end LED_CH2 of the second path of constant current module 1. The on-state of the four PMOS switching transistors Q1 is determined by the output duty ratios of out_en1, out_en2, out_en3, and out_en4 of the output ports of the control module 2, respectively.
Assuming that the constant current module 1 outputs stable current of 0.6A, the OUT_EN1 of the control module 2 outputs (0.3/0.6)%, the matrix switch module 4 of the LED lamp group #7 controls the signal of the module 2 through the CAN communication module 7, and when the output duty ratio of each integrated switch 41 of the matrix switch module 4 is 100%, the current of the LED lamp group #7 CAN be 0.3A; and then the CAN communication module 7 is used for adjusting the output duty ratio of the integrated switch 41 in the matrix switch module 4 of the LED lamp group #1 and the LED lamp group #4 to be (0.06/0.3)%, so that the currents of the LED lamp group #1 and the LED lamp group #4 are 0.06A. The OUT_EN2 of the control module 2 outputs (0.2/0.6)%, and meanwhile, the output duty ratios of the integrated switches 41 in the matrix switch modules 4 of the LED lamp group #5 and the LED lamp group #9 are adjusted to be 50% through the CAN communication module 7, so that the currents of the LED lamp group #5 and the LED lamp group #9 are 0.1A. The OUT_EN3 and OUT_EN4 of the control module 2 output (0.3/0.6)%, meanwhile, the CAN communication module 7 adjusts the output duty ratio of the integrated switch 41 in the matrix switch module 4 of the LED lamp group #2 and the LED lamp group #3 to be (0.1/0.3)%, and adjusts the output duty ratio of the integrated switch 41 in the matrix switch module 4 of the LED lamp group #6 and the LED lamp group #8 to be (0.2/0.3)%, so that the currents of the LED lamp group #2 and the LED lamp group #3 are 0.1A, and the currents of the LED lamp group #6 and the LED lamp group #8 are 0.2A. When a certain lamp group LED particle has other independent lighting requirements, a command CAN be sent through the CAN communication module 7 to adjust the output duty ratio of the corresponding integrated switch 41 in the matrix switch module 4 of the lamp group.
The power supply ends of the LED lamp groups are connected to the output end of the same constant current module through the channel switch circuit, namely, the load capacity of the existing constant current drive is fully utilized, so that one-to-many drive control is realized, and the current of each LED lamp group depends on the conduction condition of the PMOS switch tube in each channel switch circuit; the LED lamps in each LED lamp group are independently and sequentially lighted, the LED lamps are controlled by the matrix switch modules connected in parallel, the brightness of each LED lamp group and the brightness of LED particles of each LED lamp group are controlled by the independent switch modules, and the dynamic lighting of the limited DCDC constant current driving module to enough LED lamp groups is realized.
The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.
Claims (9)
1. A multi-pixel LED control system for an automotive lamp, comprising:
the input end of the constant current module is connected with a power supply at the vehicle body end;
the input end of the control module is connected with the vehicle body end and the constant current module, and is used for acquiring a vehicle body instruction and opening or closing the constant current module according to the vehicle body instruction;
the input end of the channel switch module is connected with the constant current module and the control module, the output end of the channel switch module is connected with a plurality of LED lamp groups, and the control module closes the channel switch module according to the vehicle body instruction so as to enable the LED lamp groups to be communicated with the constant current module;
the input ends of the matrix switch modules are connected with the control module, the output ends of the matrix switch modules are connected with the LED lamp groups, and the control module controls the matrix switch modules according to the vehicle body instructions so as to adjust the brightness of the LED lamp groups.
2. The multi-pixel LED control system of claim 1, wherein the channel switch module comprises: the LED lamp comprises a plurality of channel switch circuits which are arranged in parallel, wherein the input ends of the channel switch circuits are connected with the constant current module and the control module, and the output ends of the channel switch circuits are connected with at least one group of LED lamp groups.
3. The multi-pixel LED control system of claim 2, wherein adjacent groups of LED lamps are connected in parallel or in series.
4. The multi-pixel LED control system of claim 2, wherein the channel switching circuit comprises: the first transistor, the second transistor, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the diode and the transistor;
the output end of the constant current module is connected with the source electrode of the transistor, the drain electrode of the transistor is connected with the anode of the LED lamp group, the first resistor is connected between the source electrode and the grid electrode of the transistor, and the diode is connected between the source electrode and the grid electrode of the transistor;
the output end of the control module is connected with the collector electrode and the base electrode of the first triode through the second resistor, the emitter electrode of the first triode is grounded through the third resistor, the base electrode of the first triode is grounded through the fourth resistor, the base electrode of the first triode is connected with the base electrode of the second triode, the emitter electrode of the second triode is grounded through the fifth resistor, and the collector electrode of the second triode is connected with the grid electrode of the transistor through the sixth resistor.
5. The multi-pixel LED control system of claim 1, wherein the matrix switch module comprises: and the port of the integrated switch is respectively connected with the anode and the cathode of the LED lamp in the LED lamp group.
6. The multi-pixel LED control system of any one of claims 1-5, further comprising: and the filtering anti-reflection module is connected between the vehicle body end and the constant current module.
7. The multi-pixel LED control system of any one of claims 1-5, further comprising: and the first communication module is connected between the vehicle body end and the control module.
8. The multi-pixel LED control system of claim 7, further comprising: and the second communication module is connected between the control module and the matrix switch module.
9. The multi-pixel LED control system of claim 6, further comprising: and the input end of the voltage stabilizing module is connected with the filtering anti-reverse module, and the output end of the voltage stabilizing module is connected with the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223551304.6U CN219421107U (en) | 2022-12-28 | 2022-12-28 | Multi-pixel LED control system for automobile lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223551304.6U CN219421107U (en) | 2022-12-28 | 2022-12-28 | Multi-pixel LED control system for automobile lamp |
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| Publication Number | Publication Date |
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| CN219421107U true CN219421107U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223551304.6U Active CN219421107U (en) | 2022-12-28 | 2022-12-28 | Multi-pixel LED control system for automobile lamp |
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