A camera module PMIC with high compatibility and a power supply method thereof

Abstract

The application discloses a camera module PMIC with high compatibility and a power supply method thereof, the PMIC comprising a power supply chip module, a voltage regulation module and a timing control module; the voltage regulation module is electrically connected with the power supply chip module and is used for regulating the output voltage of each output channel according to the camera type; and the timing control module is electrically connected with the power supply chip module and is used for controlling the output timing of each output channel according to the camera type. The voltage regulation module is arranged, so that the voltage of each output channel can be adjusted according to the camera model; the timing control module is arranged, so that the output timing of the output channel can be adjusted according to the camera model; the power supply voltage and timing performance requirements of various models of cameras are met; the compatibility of the power supply circuit is improved; the research and development cycle is shortened; and the research and development cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of PMIC technology for cameras, and particularly to a highly compatible camera module PMIC and its power supply method. Background Technology

[0002] With the widespread application of cameras in various industries, their application scenarios and functions differ, thus requiring different types of image sensors. Different image sensor types have different requirements for power supply and power-on timing; failure to meet these requirements will affect the image quality and functionality of the image sensor.

[0003] Currently, the stacked structure of automotive cameras is designed with two PCB boards: PCB board 1 houses the image sensor, and PCB board 2 houses the PMIC power supply. PCB board 1 and PCB board 2 are connected via connectors. However, when developing a variety of camera products, different power supply chip circuits need to be designed for each camera to meet the power supply and power-on timing requirements of different image sensors. This design requires many different power supply chip circuit PCB boards, which is detrimental to hardware management and prolongs the development cycle. Summary of the Invention

[0004] There are many types of automotive camera products on the market, but the power chip circuits have poor compatibility. Different types of automotive cameras require separate development of power chip circuits, which lengthens the R&D cycle and costs, and is also not conducive to hardware management.

[0005] To address the aforementioned issues, a highly compatible camera module (PMIC) and its power supply method are proposed. By setting a voltage regulation module, the voltage of each output channel can be adjusted according to the camera model. By setting a timing control module, the timing of the output channels can be adjusted according to the camera model, thus meeting the power supply voltage and timing performance requirements of various camera models. This improves the compatibility of the power supply circuit, shortens the R&D cycle, and reduces R&D costs.

[0006] Firstly, a highly compatible camera module PMIC includes:

[0007] Power chip module;

[0008] Voltage regulation module;

[0009] Timing control module;

[0010] The power chip module is used to process the input power voltage and output it to the image sensor through the output channel.

[0011] The voltage regulation module is electrically connected to the power chip module and is used to adjust the output voltage of each output channel according to the camera type;

[0012] The timing control module is electrically connected to the power chip module and is used to control the output timing of each output channel according to the camera type.

[0013] In conjunction with the highly compatible camera module PMIC described in the first aspect of the present invention, in a first possible embodiment, the power chip module includes:

[0014] Processing chip, multiple output channels;

[0015] The plurality of output channels are respectively led out from the pins of the processing chip.

[0016] In conjunction with the first possible embodiment of the first aspect of the present invention, in a second possible embodiment, the voltage regulation module includes:

[0017] Multiple voltage regulation units;

[0018] The plurality of voltage regulation units are electrically connected to the plurality of output channels one by one, and are used to adjust the output voltage of each channel by adjusting the resistor.

[0019] In conjunction with the second possible implementation of the first aspect of the present invention, in the third possible implementation, the timing control module includes:

[0020] Multiple enable control inputs;

[0021] Timing adjustment unit;

[0022] Multiple enable control outputs;

[0023] The timing adjustment unit sequentially inputs each enable control signal from the processing chip through the plurality of enable control input terminals;

[0024] The timing adjustment unit adjusts the output timing of the enable control signal according to the camera type, and outputs it to the processing chip through the multiple enable control output terminals.

[0025] In conjunction with the third possible implementation of the first aspect of the present invention, in the fourth possible implementation, the timing adjustment unit is a timing adjustment array, comprising:

[0026] Four input rows and three output columns;

[0027] The first input row is a common row, electrically connected to all output columns.

[0028] Each of the remaining input rows is electrically connected to any two of the three output columns.

[0029] In conjunction with the fourth and fifth possible embodiments of the first aspect of the present invention, the timing adjustment unit disconnects / connects the output column from the remaining input rows according to the camera type to adjust the timing of the enable control signal and obtain the enable output timing.

[0030] In conjunction with the fifth possible implementation of the first aspect of the present invention, and in the sixth possible implementation, the number of output channels and voltage regulation units is four;

[0031] The output channels include a first output channel, a second output channel, a third output channel, and a fourth output channel;

[0032] The voltage regulation unit includes a first voltage regulation unit, a second voltage regulation unit, a third voltage regulation unit, and a fourth voltage regulation unit;

[0033] The first voltage regulation unit, the second voltage regulation unit, the third voltage regulation unit, and the fourth voltage regulation unit are electrically connected to the first output channel, the second output channel, the third output channel, and the fourth output channel, respectively.

[0034] The first output channel is used to supply power to the second, third, and fourth output channels through the input pins of the power supply voltage converted by the processing chip.

[0035] The second, third, and fourth output channels are used to provide power voltage to the camera module.

[0036] In conjunction with the fifth and seventh possible embodiments of the first aspect of the present invention, the number of enable control input terminals is four, which are used to input four enable control signals respectively;

[0037] The number of enable control output terminals is three, which are used to output enable control signals with specific timing to control the outputs of the second output channel, the third output channel and the fourth output channel.

[0038] Secondly, a highly compatible camera module PMIC power supply method, employing the camera power supply circuit described in the first aspect, includes:

[0039] Step 100: After processing the input first power supply voltage, the processing chip outputs the second power supply voltage through the first output channel.

[0040] Step 200: Adjust the second power supply voltage according to the camera type to obtain a third power supply voltage, and use the third power supply voltage to power each output channel;

[0041] Step 300: The processing chip outputs an enable control signal, and the timing of each enable control signal is adjusted by the timing control module according to the camera type to obtain the enable output timing.

[0042] Step 400: Adjust the output voltage of the second output channel, the third output channel and the fourth output channel according to the camera type, and output them to the camera module according to the enable output timing.

[0043] In conjunction with the highly compatible camera module PMIC power supply method described in the second aspect, in a first possible implementation, step 300 includes:

[0044] Step 310: Electrically connect the first input row of the timing adjustment unit to the output column;

[0045] Step 320: Electrically connect any remaining input row to any two of the three output columns;

[0046] Step 330: According to the camera type, disconnect / connect the output column from the remaining input rows to adjust the timing of the enable control signal and obtain the enable output timing.

[0047] The present invention provides a highly compatible camera module PMIC and its power supply method. By setting a voltage adjustment module, the voltage of each output channel can be adjusted according to the camera model. By setting a timing control module, the timing of the output channels can be adjusted according to the camera model, thus meeting the power supply voltage and timing performance requirements of various camera models. This improves the compatibility of the power supply circuit, shortens the development cycle, and reduces the development cost. Attached Figure Description

[0048] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the circuit structure of the camera module;

[0050] Figure 2 This is a schematic diagram of the circuit structure of the camera module in this application;

[0051] Figure 3 This is a diagram showing the electronic component connection structure between the power chip module and the voltage regulation module in this application;

[0052] Figure 4This is a diagram showing the electronic component connection structure of the timing control module in this application;

[0053] Figure 5 This is a flowchart illustrating a specific implementation of the highly compatible camera module power supply method in this application;

[0054] Figure 6 yes Figure 5 A flowchart illustrating a specific implementation of S300. Detailed Implementation

[0055] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are all within the scope of protection of this invention.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] Glossary

[0060] PMIC: Power Management Integrated Circuit

[0061] PCB: Printed Circuit Board

[0062] There are many types of automotive camera products on the market, but the power chip circuits have poor compatibility. Different types of automotive cameras require separate development of power chip circuits, which lengthens the R&D cycle and costs, and is also not conducive to hardware management.

[0063] To address the above issues, a highly compatible camera module PMIC and its power supply method are proposed.

[0064] Firstly, a highly compatible camera module PMIC, such as Figure 2 , Figure 2 This is a schematic diagram of the circuit structure of the camera module in this application; it includes a power chip module, a voltage regulation module 100, and a timing control module 200. The voltage regulation module 100 is electrically connected to the power chip module and is used to adjust the output voltage of each output channel according to the camera type. The timing control module 200 is electrically connected to the power chip module and is used to control the output timing of each output channel according to the camera type. By setting the voltage regulation module 100, the voltage of each output channel can be adjusted according to the camera model. By setting the timing control module 200, the timing of the output channel can be adjusted according to the camera model, meeting the power supply voltage and timing performance requirements of various camera models, improving the compatibility of the power supply circuit, shortening the development cycle, and reducing development costs.

[0065] In this embodiment, as Figure 1 , Figure 1 This is a schematic diagram of the circuit structure of a camera module; the basic camera design consists of PCB board 1 and PCB board 2. PCB board 1 is the image sensor circuit board, and PCB board 2 is the PMIC power module circuit board. PCB board 1 and PCB board 2 are connected by connectors. The PCB board stack-up structure is not limited to two boards; it can also consist of two or more boards.

[0066] Specifically, such as Figure 3 The power chip module includes a processing chip U1 and multiple output channels; the multiple output channels are respectively led out from the pins of the processing chip U1.

[0067] In this embodiment, as Figure 3 It can use four output channels, namely VCH1, VCH2, VCH3, and VCH4, which are connected to the aforementioned processing chip U1 through their respective pins SW1, SW2, SW3, and SW4.

[0068] Specifically, the voltage regulation module 100 includes multiple voltage regulation units; each of the multiple voltage regulation units is electrically connected to a multiple output channel and is used to adjust the output voltage of each channel by adjusting the resistor.

[0069] Preferably, there are four output channels and four voltage regulation units. The output channels include a first output channel VCH1, a second output channel VCH2, a third output channel VCH3, and a fourth output channel VCH4. The voltage regulation units include a first voltage regulation unit, a second voltage regulation unit, a third voltage regulation unit, and a fourth voltage regulation unit. The first voltage regulation unit, the second voltage regulation unit, the third voltage regulation unit, and the fourth voltage regulation unit are electrically connected to the first output channel VCH1, the second output channel VCH2, the third output channel VCH3, and the fourth output channel VCH4, respectively. The first output channel VCH1 is used to provide power to the second output channel VCH2, the third output channel VCH3, and the fourth output channel VCH4 through the input pin after the power supply voltage converted by the processing chip is converted. The second output channel VCH2, the third output channel VCH3, and the fourth output channel VCH4 are used to provide power voltage to the camera module.

[0070] like Figure 3 , Figure 3 This is a diagram showing the electronic component connection structure of the power chip module and voltage regulation module 100 in this application. The first voltage regulation unit is electrically connected to the first output channel VCH1, including resistors (R10, R11), and is also connected to the feedback pin FB1 of the processing chip U1. The second voltage regulation unit is electrically connected to the second output channel VCH2, including resistors (R20, R21), and is also connected to the feedback pin FB2 of the processing chip U1. The third voltage regulation unit is electrically connected to the third output channel VCH3, including resistors (R30, R31), and is also connected to the feedback pin FB3 of the processing chip U1. The fourth voltage regulation unit is electrically connected to the fourth output channel VCH4, including resistors (R40, R41), and is also connected to the feedback pin FB4 of the processing chip U1.

[0071] In this embodiment, the PMIC power processing chip U1 outputs three power supply voltages to power the image sensor on the image sensor circuit board. The three power supply output channels are VCH2, VCH3, and VCH4. The voltages of the three power supplies output by the PMIC processing chip U1 can be set according to the requirements of the image sensor. For example, if VCH2 needs to output 3.3V, only the values ​​of resistors R20 and R21 need to be changed. Similarly, changing the values ​​of resistors R30 / R31 and R40 / R41 can set the output voltage values ​​of VCH3 and VCH4.

[0072] Specifically, the timing control module 200 includes multiple enable control input terminals, a timing adjustment unit, and multiple enable control output terminals; the timing adjustment unit sequentially inputs each enable control signal from the processing chip through the multiple enable control input terminals; the timing adjustment unit adjusts the output timing of the enable control signals according to the camera type, and outputs them to the processing chip U1 through the multiple enable control output terminals.

[0073] Preferably, there are 4 enable control input terminals, which are used to input 4 enable control signals respectively; and 3 enable control output terminals, which are used to output enable control signals with specific timing to control the output of the second output channel, the third output channel and the fourth output channel.

[0074] In practical applications, the power-on timing requirements of image sensors in different types of camera modules vary. Therefore, by changing the power-on sequence of the input enable terminals EN2, EN3, and EN4 of the three power supplies (VCH2, VCH3, and VCH4) of the PMIC chip, different output sequences corresponding to the three power supplies can be achieved. For example, if the PMIC is set to output power sequence VCH4—VCH3—VCH2, then the enable output sequence of the corresponding output channel will be EN4—EN3—EN2.

[0075] like Figure 3 and Figure 4 The enable control input terminals include PG1, PG2, PG3, and PG4, and the enable output terminals include EN2, EN3, and EN4.

[0076] Figure 3 The enable pin EN1 is used to enable the input power supply. The voltage output by the first output channel VCH1 supplies power to the second output channel VCH2, the third output channel VCH3 and the fourth output channel VCH4 through the pin VIN234.

[0077] Specifically, the timing adjustment unit is a timing adjustment array, including 4 input rows and 3 output columns; wherein, the first input row is a common row and is electrically connected to all output columns, and any remaining input row is electrically connected to any two of the 3 output columns.

[0078] In this embodiment, the input row and output column are connected by resistors, as shown in the specific structural diagram below. Figure 4 This includes resistors (R1-R9).

[0079] Furthermore, such as Figure 4 , Figure 4 This is a diagram showing the electronic component connection structure of the timing control module 200 in this application; the timing adjustment unit disconnects / connects the output column with the remaining input row according to the camera type to adjust the timing of the enable control signal and obtain the enable output timing.

[0080] The PMIC design principle of this application embodiment is as follows:

[0081] After the PMIC chip U1 receives a 12V DC voltage at its power input terminal VIN1 (pin 13), and the first output channel VCH1 power input enable terminal EN1 (pin 12) is connected to the input power supply, enabling EN1 to be in a high-level enabled state, the PMIC chip U1 will output the first output channel VCH power supply VCH1 (pin 15). The voltage value of VCH1 output can be set according to the resistance values ​​of resistors R10 and R11. Furthermore, the PMIC chip U1's first output channel VCH power supply output indicator PG1 (pin 9) will be in a high-level state, indicating that the first output channel VCH power supply VCH1 voltage output is normal.

[0082] After the voltage output of the first output channel VCH1 of PMIC chip U1 is normal, power is supplied to the power input terminal VIN234 (pin10) of the second output channel VCH2, the third output channel VCH3, and the fourth output channel VCH4 of chip U1.

[0083] When the power input enable pins EN2 (pin 6), EN3 (pin 2), and EN4 (pin 16) of the second output channel VCH2, third output channel VCH3, and fourth output channel VCH4 of PMIC chip U1 are not enabled with a high level, the power supply of the second output channel VCH2 (pin 22), third output channel VCH3 (pin 24), and fourth output channel VCH4 (pin 17) of PMIC chip U1 will not output voltage. Therefore, by setting the required sequence of enabling the input enable pins of the three power supplies of PMIC chip U1 (EN2, EN3, and EN4), the power supply of the second output channel VCH2 (pin 22), third output channel VCH3 (pin 24), and fourth output channel VCH4 (pin 17) of PMIC chip U1 will output voltage in the set sequence. Furthermore, the power output indicators PG2 (pin23), PG3 (pin19), and PG4 (pin20) of the second, third, and fourth output channels of PMIC chip U1 are in a high-level state. The high-level state of PG2, PG3, and PG4 indicates that the channel power voltage output of the second output channel VCH2, the third output channel VCH3, and the fourth output channel VCH4 is normal.

[0084] The PMIC chip U1 can combine nine different power-on sequences for VCH2, VCH3, and VCH4 based on the power input enable pins EN2, EN3, and EN4 and the power output indicators PG2, PG3, and PG4 (3 to the power of 2 equals 9). This can be achieved by soldering or leaving unsoldered resistors R1-R9 on the PMIC power module circuit board. All resistors are 0 ohms and can be used as wires. The following shows different power-on sequences for VCH2, VCH3, and VCH4 power supplies, depending on the resistors soldered into the circuit:

[0085] ① When R1, R2, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1—VCH2, VCH3, VCH4.

[0086] ②. When R1, R2, and R5 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH2, VCH3——VCH4.

[0087] ③. When R1, R4, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH2, VCH4——VCH3.

[0088] ④. When R6, R2, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH3, VCH4——VCH2.

[0089] ⑤. When R6, R2, and R5 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH3——VCH2——VCH4.

[0090] ⑥. When R6, R9, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH4——VCH3——VCH2.

[0091] ⑦. When R8, R2, and R7 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH3——VCH4——VCH2.

[0092] ⑧. When R8, R4, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH4——VCH2——VCH3.

[0093] 9. When R8, R9, and R3 are soldered and the others are not soldered (the other resistor connections are disconnected), the output timing sequence is: VCH1——VCH4——VCH2, VCH3.

[0094] Finally, the power supply and power-on timing requirements of different image sensors are set to achieve a shared PMIC power module circuit board.

[0095] The PMIC chip U1 model is not limited for the PMIC power module circuit board; it is applicable to power PMIC chips U1 based on the same principle.

[0096] Secondly, such as Figure 5 , Figure 5 This is a flowchart illustrating a specific embodiment of the highly compatible camera module power supply method of this application; a highly compatible camera module PMIC power supply method, employing the camera power supply circuit of the first aspect, includes:

[0097] S100: After processing the input first power supply voltage, the processing chip outputs the second power supply voltage through the first output channel.

[0098] S200: Adjust the second power supply voltage according to the camera type to obtain the third power supply voltage, and use the third power supply voltage to power each output channel.

[0099] S300: The processing chip outputs an enable control signal. Based on the camera type, the timing control module 200 adjusts the timing of each enable control signal to obtain the enable output timing.

[0100] S400 adjusts the output voltage of the second, third, and fourth output channels according to the camera type, and outputs it to the camera module according to the enable output timing.

[0101] Preferred, such as Figure 6 , Figure 6 yes Figure 5 A flowchart of a specific implementation of S300 is shown. S300 includes: S310, electrically connecting the first input row and the output column of the timing adjustment unit; S320, electrically connecting any remaining input row to any two of the three output columns; S330, adjusting the timing of the enable control signal by disconnecting / connecting the output column to the remaining input row according to the camera type, thereby obtaining the enable output timing.

[0102] The present invention provides a highly compatible camera module PMIC and its power supply method. By setting a voltage adjustment module 100, the voltage of each output channel can be adjusted according to the camera model. By setting a timing control module 200, the timing of the output channel can be adjusted according to the camera model, thus meeting the power supply voltage and timing performance requirements of various camera models. This improves the compatibility of the power supply circuit, shortens the R&D cycle, and reduces R&D costs.

[0103] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A highly compatible camera module PMIC, characterized in that, include: Power chip module; Voltage regulation module; Timing control module; The power chip module is used to process the input power voltage and output it to the image sensor through the output channel. The power chip module includes a processing chip and multiple output channels, which are respectively led out from the pins of the processing chip. The voltage regulation module is electrically connected to the power chip module and is used to adjust the output voltage of each output channel according to the camera type. The voltage regulation module includes multiple voltage regulation units, which are electrically connected to each of the multiple output channels and are used to adjust the output voltage of each channel by adjusting the resistor. The timing control module is electrically connected to the power chip module and is used to control the output timing of each output channel according to the camera type; The timing control module includes multiple enable control input terminals, a timing adjustment unit, and multiple enable control output terminals. The timing adjustment unit sequentially inputs each enable control signal from the processing chip through the multiple enable control input terminals. The timing adjustment unit adjusts the output timing of the enable control signals according to the camera type and outputs them to the processing chip through the multiple enable control output terminals. The timing adjustment unit is a timing adjustment array, including 4 input rows and 3 output columns. The first input row is a common row and is electrically connected to all output columns. Any remaining input row is electrically connected to any two of the 3 output columns.

2. The highly compatible camera module PMIC according to claim 1, characterized in that, The timing adjustment unit disconnects / connects the output column to the remaining input row according to the camera type to adjust the timing of the enable control signal and obtain the enable output timing.

3. The highly compatible camera module PMIC according to claim 2, characterized in that, The number of output channels and voltage regulation units is 4; The output channels include a first output channel, a second output channel, a third output channel, and a fourth output channel; The voltage regulation unit includes a first voltage regulation unit, a second voltage regulation unit, a third voltage regulation unit, and a fourth voltage regulation unit; The first voltage regulation unit, the second voltage regulation unit, the third voltage regulation unit, and the fourth voltage regulation unit are electrically connected to the first output channel, the second output channel, the third output channel, and the fourth output channel, respectively. The first output channel is used to supply power to the second, third, and fourth output channels through the input pins of the power supply voltage converted by the processing chip. The second, third, and fourth output channels are used to provide power voltage to the camera module.

4. The highly compatible camera module PMIC according to claim 3, characterized in that, The number of enable control input terminals is 4, which are used to input 4 enable control signals respectively; The number of enable control output terminals is three, which are used to output enable control signals with specific timing to control the outputs of the second output channel, the third output channel and the fourth output channel.

5. A highly compatible power supply method for a camera module PMIC, employing the camera module PMIC as described in any one of claims 1-4, characterized in that, include: Step 100: After processing the input first power supply voltage, the processing chip outputs the second power supply voltage through the first output channel. Step 200: Adjust the second power supply voltage according to the camera type to obtain a third power supply voltage, and use the third power supply voltage to power each output channel; Step 300: The processing chip outputs an enable control signal, and the timing of each enable control signal is adjusted by the timing control module according to the camera type to obtain the enable output timing. Step 400: Adjust the output voltage of the second output channel, the third output channel and the fourth output channel according to the camera type, and output them to the camera module according to the enable output timing.

6. The highly compatible camera module PMIC power supply method according to claim 5, characterized in that, Step 300 includes: Step 310: Electrically connect the first input row of the timing adjustment unit to the output column; Step 320: Connect any remaining input row to any two of the three output columns electrically; Step 330: According to the camera type, disconnect / connect the output column from the remaining input rows to adjust the timing of the enable control signal to obtain the enable output timing.

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