Atmosphere lamp rapid color correction system

Abstract

A rapid color correction system for atmosphere lamps is provided with a color correction industrial personal computer and N paths of atmosphere lamps, and is characterized in that the color correction industrial personal computer is connected with the N paths of atmosphere lamps through LIN accelerated color correction gateway equipment; the LIN accelerated color correction gateway equipment is provided with an MCU controller, a signal receiving and transmitting end group of the MCU controller is correspondingly connected with a signal receiving and transmitting end group of at least one LIN transceiver, each LIN transceiver is provided with at least one color calibration end, and each color calibration end is connected with one path of atmosphere lamp. The method has the advantages that a communication network topology of the LIN master node and the LIN slave nodes is transformed into a single-master-node-to-multi-path-slave-node parallel LIN communication network topology, color correction data can be read and written at the same time for multiple devices with the same NAD address, the communication time is greatly shortened, and the production speed of an atmosphere lamp assembly line is increased.

Description

Technical Field

[0001] This utility model relates to the field of ambient light color calibration technology, and in particular to an ambient light rapid color calibration system. Background Technology

[0002] When automotive ambient lighting products roll off the production line, they need to undergo the final step of LED color calibration. The diagnostic commands for LED color calibration, such as turning on the lights and saving calibration data, require LIN communication with the product. The LIN communication network topology is a master-slave point-to-point method, where the color calibration device is the LIN master node and the ambient lighting product is the LIN slave node. Since they are the same product, each ambient lighting slave node has the same NAD address. When the color calibration device writes color calibration data to the LEDs of the ambient lighting product, it must first shut down the power of other products whose color calibration data is to be written, ensuring that only one ambient lighting product is on the LIN network. Each time, communication is established with a single ambient lighting product, the calibration data is written, the power of the calibrated ambient lighting product is shut down, the power of the next ambient lighting product is turned on, and communication and calibration data writing are repeated. This serialized operation, coupled with the one-second delay in the acquisition of the integrating sphere for each calibration, makes the entire color calibration pipeline a bottleneck restricting the manufacturing speed.

[0003] Disadvantages of existing technology: Traditional ambient light color calibration systems can only calibrate one ambient light product at a time with one ambient light color calibration device, which is slow and greatly increases the time and cost of ambient light manufacturing. Utility Model Content

[0004] This invention provides a rapid color calibration system for ambient lights, which can simultaneously calibrate multiple ambient lights, effectively improving the calibration speed of ambient lights.

[0005] To achieve the above objectives, this utility model provides an ambient light rapid color calibration system, which is equipped with a color calibration industrial control computer and N ambient lights. The key feature is that the color calibration industrial control computer is connected to the N ambient lights via a LIN accelerated color calibration gateway device.

[0006] The LIN accelerated color calibration gateway device is equipped with an MCU controller. The signal transceiver group of the MCU controller is connected to the signal transceiver group of at least one LIN transceiver. Each LIN transceiver is equipped with at least one color calibration terminal, and each color calibration terminal is connected to one of the ambient lights.

[0007] Through the above design, and by using the LIN acceleration color calibration gateway device, the same color calibration industrial control computer can simultaneously perform color calibration on multiple ambient lights, greatly improving the calibration speed of ambient lights.

[0008] Preferably, the MCU controller is connected to the color calibration industrial computer via a CAN bus circuit. The CAN bus circuit is equipped with a common-mode filter L1. The input terminal group of the common-mode filter L1 is connected to the signal output terminal group of the color calibration industrial computer. The input terminal group of the common-mode filter L1 is also connected to one end of the transient suppression diode array D3. The other end of the transient suppression diode array D3 is grounded. Resistors R11 and R18 are connected in series between the input terminal groups of the common-mode filter L1. The common terminal of resistors R11 and R18 is connected in series with capacitor C46 and then grounded.

[0009] The output group of the common-mode filter L1 is connected to the input group of the high-speed CAN transceiver IC7, and the output group of the high-speed CAN transceiver IC7 is connected to the signal input group of the MCU controller.

[0010] The CAN bus circuit enables information exchange between the color calibration industrial control computer and the MCU controller.

[0011] The common-mode filter L1 is used to suppress common-mode noise to improve signal quality and stability, thereby ensuring the normal operation of electronic equipment or systems.

[0012] Preferably, the color calibration industrial computer also communicates with the MCU controller via a USB communication interface.

[0013] Preferably, each color calibration terminal of the LIN transceiver is provided with a signal protection circuit between it and the corresponding ambient light. The signal protection circuit is provided with a resistor R1. The front end of the resistor R1 is connected to the color calibration terminal. The front end of the resistor R1 is also connected in series with a capacitor C20 and then grounded. The rear end of the resistor R1 is connected to the ambient light. The rear end of the resistor R1 is also connected in series with a bidirectional Zener diode ESD1 and then grounded.

[0014] The signal protection circuit is used to suppress the effects of reverse peak voltage, i.e. surge voltage, on the circuit and protect the components in the circuit from damage.

[0015] Preferably, the MCU controller controls the power supply of all LIN transceivers via a LIN startup control circuit. The LIN startup control circuit is equipped with an NPN transistor Q2. The base of transistor Q2 is connected to the LIN control terminal IND_EN of the MCU controller. The base of transistor Q2 is connected in series with capacitor C75 and then grounded. The emitter of transistor Q2 is grounded, and the collector is connected to the front end of resistor R53. The rear end of resistor R53 is connected in series with resistor R40 and then to the operating power supply. The rear end of resistor R53 is also connected to the gate of MOSFET Q1. The drain of MOSFET Q1 is connected to the operating power supply, and the source is connected to the signal input terminal INHN of all LIN transceivers.

[0016] Preferably, a LIN indicator is provided between the source of the MOS transistor Q1 and the signal input terminal INHN of each LIN transceiver. The LIN indicator is provided with an LED and a current-limiting resistor. The cathode of the LED is connected to the signal input terminal INHN of the LIN transceiver, and the anode of the LED is connected to the front end of the current-limiting resistor. The rear ends of all the current-limiting resistors are connected to the source of the MOS transistor Q1. All the LIN indicators share a common anode.

[0017] The LIN start-up control circuit is used to control the power supply of the LIN transceiver, and the LED is the power indicator light of the LIN transceiver.

[0018] Preferably, a power indicator is also provided, which includes resistors R60 and R61 connected in parallel. The common front terminal of the two resistors is connected to the operating power supply, and the common rear terminal of the two resistors is connected to the anode of the light-emitting diode LED11. The cathode of the light-emitting diode LED11 is grounded.

[0019] The power indicator is used to detect whether the working power supply is normal.

[0020] Preferably, a power supply circuit is also provided, wherein the power supply circuit is provided with a power protection circuit and a step-down circuit;

[0021] The power protection circuit is equipped with a diode D1. The anode of the diode D1 receives power, and the anode of the diode D1 is connected in series with a capacitor C12 and then grounded. The cathode of the diode D1 outputs the working power, and the cathode of the diode D1 is connected in series with an electrolytic capacitor C8 and then grounded.

[0022] The step-down circuit includes a Zener diode D2. The anode of the Zener diode D2 receives a 5V power supply, and the cathode of the Zener diode D2 is connected to the input terminal of the step-down converter IC3. The output terminal of the step-down converter IC3 outputs a 3.3V power supply. The cathode of the Zener diode D2 is connected in series with a capacitor C13 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C14 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C15 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C9 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C10 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C11 and then grounded.

[0023] The power supply circuit is used to supply power to other circuit modules.

[0024] Preferably, the MCU controller is a SAME51J18 main control MCU chip, and the LIN transceiver is an SJA1124LIN transceiver chip.

[0025] The beneficial effects of this utility model are: transforming the communication network topology of LIN master node and slave node into a parallel LIN communication network topology of single master node to multiple slave nodes, which can simultaneously read and write color calibration data for multiple devices with the same NAD address, greatly shortening the communication time and improving the production speed of the ambient light production line. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the LIN transceiver circuit in the embodiment;

[0028] Figure 3 This is a schematic diagram of the MCU controller circuit in the embodiment;

[0029] Figure 4 This is a power supply circuit diagram for the embodiment;

[0030] Figure 5 This is a CAN bus circuit diagram from an embodiment;

[0031] Figure 6 This is a circuit diagram of the USB interface in the embodiment;

[0032] Figure 7 This is a LIN startup control circuit diagram in the embodiment;

[0033] Figure 8 This is a circuit diagram of the power indicator in the embodiment. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] like Figure 1 As shown: A rapid color calibration system for ambient lights, comprising a color calibration industrial control computer and N ambient lights, wherein the color calibration industrial control computer is connected to the N ambient lights via a LIN accelerated color calibration gateway device;

[0036] The LIN accelerated color calibration gateway device is equipped with an MCU controller. The signal transceiver group of the MCU controller is connected to the signal transceiver group of at least one LIN transceiver. Each LIN transceiver is equipped with at least one color calibration terminal, and each color calibration terminal is connected to one of the ambient lights.

[0037] like Figure 5As shown: The MCU controller is connected to the color calibration industrial computer via a CAN bus circuit. The CAN bus circuit is equipped with a common-mode filter L1. The input terminal group of the common-mode filter L1 is connected to the signal output terminal group of the color calibration industrial computer. The input terminal group of the common-mode filter L1 is also connected to one end of the transient suppression diode array D3. The other end of the transient suppression diode array D3 is grounded. Resistors R11 and R18 are connected in series between the input terminal groups of the common-mode filter L1. The common terminal of resistors R11 and R18 is connected in series with capacitor C46 and then grounded.

[0038] The output group of the common-mode filter L1 is connected to the input group of the high-speed CAN transceiver IC7, and the output group of the high-speed CAN transceiver IC7 is connected to the signal input group of the MCU controller.

[0039] like Figure 2 As shown: Each color calibration terminal of the LIN transceiver is equipped with a signal protection circuit between it and the corresponding ambient light. The signal protection circuit is equipped with a resistor R1. The front end of the resistor R1 is connected to the color calibration terminal. A capacitor C20 is connected in series with the front end of the resistor R1 and then grounded. The rear end of the resistor R1 is connected to the ambient light. A bidirectional Zener diode ESD1 is connected in series with the rear end of the resistor R1 and then grounded.

[0040] like Figure 3 , Figure 7 As shown: The MCU controller controls the power supply of all LIN transceivers via a LIN startup control circuit. The LIN startup control circuit is equipped with an NPN transistor Q2. The base of transistor Q2 is connected to the LIN control terminal IND_EN of the MCU controller. The base of transistor Q2 is connected in series with capacitor C75 and then grounded. The emitter of transistor Q2 is grounded, and the collector is connected to the front end of resistor R53. The rear end of resistor R53 is connected in series with resistor R40 and then to the operating power supply. The rear end of resistor R53 is also connected to the gate of MOSFET Q1. The drain of MOSFET Q1 is connected to the operating power supply, and the source is connected to the signal input terminal INHN of all LIN transceivers.

[0041] A LIN indicator is provided between the source of the MOS transistor Q1 and the signal input terminal INHN of each LIN transceiver. The LIN indicator is equipped with an LED and a current-limiting resistor. The cathode of the LED is connected to the signal input terminal INHN of the LIN transceiver, and the anode of the LED is connected to the front end of the current-limiting resistor. The rear ends of all the current-limiting resistors are connected to the source of the MOS transistor Q1. All the LIN indicators share a common anode.

[0042] like Figure 8As shown: A power indicator is also provided, which is equipped with resistors R60 and R61. Resistors R60 and R61 are connected in parallel. Their common front terminal is connected to the working power supply, and their common rear terminal is connected to the anode of LED11. The cathode of LED11 is grounded.

[0043] like Figure 4 As shown: A power supply circuit is also provided, which includes a power protection circuit and a step-down circuit;

[0044] The power protection circuit is equipped with a diode D1. The anode of the diode D1 receives power, and the anode of the diode D1 is connected in series with a capacitor C12 and then grounded. The cathode of the diode D1 outputs the working power, and the cathode of the diode D1 is connected in series with an electrolytic capacitor C8 and then grounded.

[0045] The step-down circuit includes a Zener diode D2. The anode of the Zener diode D2 receives a 5V power supply, and the cathode of the Zener diode D2 is connected to the input terminal of the step-down converter IC3. The output terminal of the step-down converter IC3 outputs a 3.3V power supply. The cathode of the Zener diode D2 is connected in series with a capacitor C13 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C14 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C15 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C9 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C10 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C11 and then grounded.

[0046] like Figure 6 As shown: The color calibration industrial control computer also communicates with the MCU controller via a USB communication interface.

[0047] like Figure 1 As shown, in this embodiment, the MCU controller uses the SAME51J18 main control MCU chip, and the LIN transceiver uses the SJA1124 LIN transceiver chip. The MCU controller is connected to 10 LIN transceivers. The hardware circuit design shows that the MCU controller drives 10 SJA1124 LIN transceiver chips through 10 SPI interfaces. Each SJA1124 LIN transceiver chip drives 4 ambient lights, realizing 40 independent LIN channels. That is, the same color calibration industrial control computer can simultaneously drive 40 ambient lights for color calibration. Communication time is improved by 40 times, accelerating the production speed of the assembly line by 40 times.

[0048] In this embodiment, the custom protocol for the USB interface messages between the color calibration industrial control computer and the LIN parallel communication device is as follows:

[0049]

[0050] The target channel (dst_chan) is defined as follows:

[0051] Bit39 Bit38 Bit37 … Bit2 Bit1 Bit0

[0052] When Bit 39 is 1, it indicates that the data is sent to LIN channel 40; when Bit 38 is 1, it indicates that the data is sent to LIN channel 39; when Bit 37 is 1, it indicates that the data is sent to LIN channel 38; ...; when Bit 1 is 1, it indicates that the data is sent to LIN channel 2; when Bit 0 is 1, it indicates that the data is sent to LIN channel 1.

[0053] When dst_chan = 0, it represents the host PC channel;

[0054] When dst_chan = 0xffffffffff, it indicates 40 broadcast channels;

[0055] If multiple bits in dst_chan are set to 1, it indicates a multicast channel.

[0056] The source channel (src_chan) is defined as follows:

[0057] src_chan=0 indicates that the message originates from the PC host;

[0058] src_chan=1 indicates that the message originates from LIN channel 1;

[0059] src_chan=2 indicates that the message originates from LIN channel 2;

[0060] src_chan=3 indicates that the message originates from LIN channel 3;

[0061] …

[0062] src_chan=38 indicates that the message originates from LIN channel 38;

[0063] src_chan=39 indicates that the message originates from LIN channel 39;

[0064] src_chan=40 indicates that the message originates from LIN channel 40.

[0065] The length is 1 byte, which indicates the length of the PDU data.

[0066] The PDU data format is defined as follows:

[0067] LIN frame ID (1 byte) LIN PDU (0-8 bytes)

[0068] CRC field: The CRC16 check area is the content region starting from the target channel field and ending at the PDU field, and the check polynomial is: x 16 +x15 +x 2 +1.

[0069] The LIN communication protocol between the 40-channel LIN and the ambient lighting product is as follows:

[0070] Each LIN bus still uses the standard ISO14229 LIN diagnostic protocol with the ambient lighting products, without making any changes to the original protocol of the ambient lighting products.

[0071] The software design logic for the 40-channel LIN communication device is as follows:

[0072] 1. The main function of the software is to decompose and repackage the messages received from the 40 LIN bus channels and USB bus according to the above protocol design, and then forward them again. Since the communication rate of the USB channel is much greater than the sum of the rates of the 40 LIN buses, and each of the 40 LIN buses is designed with independent hardware, the 40 LIN buses can operate in parallel at full load.

[0073] 2. Downlink direction: When the gateway receives a message from the PC, it parses the LIN frame ID and LIN PDU data from the message, parses the dst_addr field, and the LIN channel corresponding to the bit set to 1 will immediately send the LIN frame ID and LIN PDU data. Each LIN channel executes the standard LIN communication protocol.

[0074] 3. Uplink direction: When the gateway receives a message from the PC, it parses out the LIN frame ID and 0-byte LINPDU data from the PDU data. It parses the dst_addr field, and the LIN channel corresponding to the bit set to 1 will immediately send the LIN_frame ID and wait for the corresponding LIN slave node to respond with a LIN message. After receiving the response message, dst_chan = 0, src_chan = response message channel PDU = LIN frame ID and response message content, and encapsulates and sends the message according to the communication design protocol format.

[0075] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid color calibration system for ambient lights, comprising a color calibration industrial control computer and N ambient lights, characterized in that: The color calibration industrial control computer is connected to N ambient lights via a LIN acceleration color calibration gateway device; The LIN accelerated color calibration gateway device is equipped with an MCU controller. The signal transceiver group of the MCU controller is connected to the signal transceiver group of at least one LIN transceiver. Each LIN transceiver is equipped with at least one color calibration terminal, and each color calibration terminal is connected to one of the ambient lights.

2. The ambient light rapid color calibration system according to claim 1, characterized in that: The MCU controller is connected to the color calibration industrial computer via a CAN bus circuit. The CAN bus circuit is equipped with a common-mode filter L1. The input terminal group of the common-mode filter L1 is connected to the signal output terminal group of the color calibration industrial computer. The input terminal group of the common-mode filter L1 is also connected to one end of the transient suppression diode array D3. The other end of the transient suppression diode array D3 is grounded. Resistors R11 and R18 are connected in series between the input terminal groups of the common-mode filter L1. The common terminal of resistors R11 and R18 is connected in series with capacitor C46 and then grounded. The output group of the common-mode filter L1 is connected to the input group of the high-speed CAN transceiver IC7, and the output group of the high-speed CAN transceiver IC7 is connected to the signal input group of the MCU controller.

3. The ambient light rapid color calibration system according to claim 1, characterized in that: The color calibration industrial computer also communicates with the MCU controller via a USB communication interface.

4. The ambient light rapid color calibration system according to claim 1, characterized in that: Each color calibration terminal of the LIN transceiver is connected to the corresponding ambient light via a signal protection circuit. The signal protection circuit includes a resistor R1. The front end of the resistor R1 is connected to the color calibration terminal, and a capacitor C20 is connected in series with the front end of the resistor R1 before grounding. The rear end of the resistor R1 is connected to the ambient light, and a bidirectional Zener diode ESD1 is connected in series with the rear end of the resistor R1 before grounding.

5. The ambient light rapid color calibration system according to claim 1, characterized in that: The MCU controller controls the power supply of all LIN transceivers via a LIN startup control circuit. The LIN startup control circuit is equipped with an NPN transistor Q2. The base of transistor Q2 is connected to the LIN control terminal IND_EN of the MCU controller. The base of transistor Q2 is connected in series with capacitor C75 and then grounded. The emitter of transistor Q2 is grounded, and the collector is connected to the front end of resistor R53. The rear end of resistor R53 is connected in series with resistor R40 and then to the operating power supply. The rear end of resistor R53 is also connected to the gate of MOSFET Q1. The drain of MOSFET Q1 is connected to the operating power supply, and the source is connected to the signal input terminal INHN of all LIN transceivers.

6. The ambient light rapid color calibration system according to claim 5, characterized in that: A LIN indicator is provided between the source of the MOS transistor Q1 and the signal input terminal INHN of each LIN transceiver. The LIN indicator is equipped with an LED and a current-limiting resistor. The cathode of the LED is connected to the signal input terminal INHN of the LIN transceiver, and the anode of the LED is connected to the front end of the current-limiting resistor. The rear ends of all the current-limiting resistors are connected to the source of the MOS transistor Q1. All the LIN indicators share a common anode.

7. The ambient light rapid color calibration system according to claim 1, characterized in that: A power indicator is also provided, which includes resistors R60 and R61 connected in parallel. The common front terminal of the two resistors is connected to the working power supply, and the common rear terminal is connected to the anode of LED11. The cathode of LED11 is grounded.

8. The ambient light rapid color calibration system according to claim 1, characterized in that: It is also equipped with a power supply circuit, which includes a power protection circuit and a step-down circuit; The power protection circuit is equipped with a diode D1. The anode of the diode D1 receives power, and the anode of the diode D1 is connected in series with a capacitor C12 and then grounded. The cathode of the diode D1 outputs the working power, and the cathode of the diode D1 is connected in series with an electrolytic capacitor C8 and then grounded. The step-down circuit includes a Zener diode D2. The anode of the Zener diode D2 receives a 5V power supply, and the cathode of the Zener diode D2 is connected to the input terminal of the step-down converter IC3. The output terminal of the step-down converter IC3 outputs a 3.3V power supply. The cathode of the Zener diode D2 is connected in series with a capacitor C13 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C14 and then grounded. The cathode of the Zener diode D2 is also connected in series with a capacitor C15 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C9 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C10 and then grounded. The output terminal of the step-down converter IC3 is also connected in series with a capacitor C11 and then grounded.

9. The ambient light rapid color calibration system according to claim 1, characterized in that: The MCU controller is a SAME51J18 main control MCU chip, and the LIN transceiver is an SJA1124LIN transceiver chip.

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