WO2011050596A1

WO2011050596A1 - Portable day and night double purpose night vision equipment circuit

Info

Publication number: WO2011050596A1
Application number: PCT/CN2010/070543
Authority: WO
Inventors: 陈彬
Original assignee: 广州市晶华光学电子有限公司
Priority date: 2009-10-30
Filing date: 2010-02-05
Publication date: 2011-05-05
Also published as: CN101697034A; CN101697034B

Abstract

A portable day and night double purpose night vision equipment circuit for working at day and night two kinds environment is provided, which includes an imaging circuit used to obtain images, an image decoding and displaying circuit used to decode a video signal from an image obtained by the imaging circuit and display the image, a power supply and main control circuit used to provide a qualified power supply and image signal channel for imaging circuit and image decoding and displaying circuit and control a variety of application functions of whole machine. The said imaging circuit is a CCD imaging circuit. The said image decoding and displaying circuit uses micro display and outputs a color image under a light and weak light environment. Using combination with CCD chips, obtaining image is ensured under an environment of presence of light. In addition, the night vision equipment has a built-in infrared light source, outputting color images under the presence of light and weak light and outputting black and white images in the plain black case. Under the environment of presence of light an observation distance is infinity, under the weak light the observation distance is greater than 600 meters and in the environment of plain black the observation distance is less than 250 meters.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a day and night night vision circuit, and more particularly to a portable day and night digital color night vision device circuit. BACKGROUND OF THE INVENTION Night vision devices are professional products with high-tech optoelectronic integration. At present, night vision devices are classified into portable and non-portable types in terms of power consumption, and non-portable vehicles, airborne, and carrier-type. It has the characteristics of high voltage and high power consumption, complex optical system and long night vision distance. It has a large number of military possessions and is expensive. It is portable and battery-powered. The optical system is simple, the night vision distance is short, the price is cheap, and the civilian use is mostly. From the field of electrical imaging, it is divided into micro-light tube night vision device and CCD night vision device. The micro-light tube imaging night vision device can only work in low light and pure black environment. Under the strong light, the micro light pipe will be damaged. Unlike CCD night vision devices, it can work in a light environment. Due to the sensitivity of the CCD to infrared light, it can also be used in low-light and pure black environments with the aid of an auxiliary infrared light source. CCD night vision devices are the future development direction. Currently, portable CCD night vision devices are black and white image output. The active night vision device and the passive night vision device are divided into the auxiliary light source, and the active night vision device is equipped with an infrared light source of 850 nm-950 nm wavelength or an infrared laser light source for illumination according to the insensitivity of the human eye to infrared rays. The target is imaged by infrared reflection, which is characterized by a long viewing distance (related to the infrared emission power), but the concealment is poor. The passive night vision device does not have an auxiliary infrared light source, and is captured by the reflected light of the target itself or the infrared light emitted by itself. The feature is good concealment, but the observation distance is close. At present, the civil night vision devices are active, and the active night vision devices have built-in infrared light sources, and the observation distance can be adjusted according to the power of the infrared light sources. In view of the above deficiencies, the utility model provides a circuit for a portable day and night night vision circuit that can work in both day and night environments. The portable day and night night vision circuit of the present invention comprises an imaging circuit for acquiring an image, an image decoding and display circuit for decoding an image obtained by the imaging circuit, and displaying the image, and The imaging circuit and the image decoding and display circuit provide a power supply and a main control circuit for controlling the power supply and the image signal channel and the various application functions of the whole machine. The imaging circuit is a CCD imaging circuit, The image decoding and display circuit uses a microdisplay to output a color image in a light and low light environment. The CCD imaging circuit includes a CCD signal processing unit and a CCD power supply unit, and the CCD signal processing unit acquires image information through the CCD chip, and performs picking, amplifying, A/D, and D/A processing operations on the acquired image information, and The formed color image is phase corrected and outputted, and the CCD power supply unit provides a stable working voltage for the CCD chip; the power supply and the main control circuit include an MCU control unit, a power input unit, a built-in IR and control unit, a boosting unit, and an image. Phase conversion and control unit, ambient brightness detection unit, voltage stabilization unit and function indication unit, MCU control unit controls power supply of each unit, transmission of image signals, built-in IR-assisted illumination and ambient brightness detection, power input unit for night The power supply of the video camera is introduced, the voltage regulator unit provides a stable 0V-3V driving voltage for the IR lamp, and provides a stable 3.3V working voltage for the MCU. The built-in IR and control unit are night vision devices in dark and low light environments. Actively providing an auxiliary infrared source, the boost unit provides appropriate voltage and current for the CCD imaging circuit, image phase The switching control unit provides correct image phase information for the image decoding and display circuit, and serves as a power supply and image signal interface for the image decoding and display circuit. The ambient brightness detecting unit is used for detecting the brightness of the application environment of the night vision device, which is an MCU. Providing information for automatically turning the IR infrared light source on and off, the function indicating unit is configured to display various working states of the night vision device; the image decoding and display circuit comprises a microcontroller unit, a micro display unit, a video signal decoder unit and decoding The power unit, the microcontroller unit controls the micro display unit and the video signal decoder unit to operate normally by software instructions, and the micro display unit receives image information from the video signal decoder unit and is used to display images under the control of the MCU, and the video signal is decoded. The unit receives the composite TV signal and decodes the signal under the control of the MCU and sends the display. The decoding power unit provides +5V, +3.3V, +2.8V, +2.5V and +1.8V qualified power. The CCD chip includes CXD2163BR, CXD2006, and CXD2480R+ICX259. The CCD signal processing unit takes CXD2163BR as the core, acquires image information by the CCD sensor ICX259AK, and transmits the level change of the image information into the CXD2480R in real time according to the timing of the CXD2480R. The CXD2480R generates a CCD in cooperation with the external crystal and the DSP chip CXD2163BR. The timing drive signal of the sensor, the CXA2006Q chip quantizes the analog image signal picked up by the CCD in the cooperation of the DSP chip CXD2163BR, and provides the AGC signal, the CXD2163BR performs A/D conversion on the analog image signal, and the SNC33840 chip performs the quantized digital signal. Storage, NJM2274R is used to convert the digital image signal processed by CXD2163BR into D/A to form a composite analog TV signal, and finally output by the 3rd and 4th feet; in the CCD power supply unit, the CCD chip and the power supply and the main control circuit Connect as three PIN The cable is +10V, GND and B VIDEO. The DC9V-12V power supply from the power supply and main control circuit is input from the power port of the three PIN cable. It is connected to the error-proof circuit 1N5819, and the system is stabilized. The voltage chip 603P332MR, 78L09, buck chip MP1410ES, half bridge and 7.5V voltage regulator and other inductors, resistors, and capacitors will boost, step down, stabilize, and process the power supply to form five paths, respectively +15V, -7V , +5V, +3.3V, of which +3.3V has two ways, for CCD chip CCD sensor ICX259AK, sequential circuit CXD2480R, AGC controller A / D converter chip CXA2006Q and DSP chip CXD2163BR to provide stable operating voltage and current. . The MCU control unit is an 8-bit MCU chip EM78P156EL; in the power input unit, when the power button is pressed, the Q9 conduction relay pulls the whole machine to conduct electricity, and under the cooperation of the 11th foot of the MCU, the Q9 will continue to conduct to saturation. The relay is locked and locked, and the whole machine is stably powered. When the power button is pressed again, the MCU pin 17 detects the power-off signal, the 11-pin output is low, and Q1 is turned off, causing the Q9 to be discharged as the relay coil is disconnected. The machine is completely powered off; in the built-in IR and control unit, CN4 is the interface of the external IR lamp, Q3, Q5, Q10 and the seventh leg of the MCU constitute the driving circuit of the IR lamp, and the DOWN and UP buttons provide the MCU. The control signal of the brightness of the IR lamp can dynamically adjust the output power of the IR lamp according to the observation target distance; the boosting unit is composed of MC34063 and peripheral circuits, P4 input +5V power supply, P6 output 9V-10V, wherein L1 is a storage inductor, D6 is a high frequency rectifier tube, R21, R28, R31, R27 and R*5 form a voltage dividing sampling circuit, and E9, E10, E12, C3, C5 and C9 constitute a filtering circuit; the image phase conversion and control unit comprises a video image Output port CN1, transistor Q2 and peripheral resistor container constitute image phase conversion circuit, transistor Q4 and MCU pin 10 constitute image extinction circuit; in ambient brightness detection unit, transistor Q6, peripheral device resistor R24, R25, R26 and MCU number 8 The foot constitutes the brightness detecting circuit, and the CN5 external photosensitive sensor. When the ambient brightness is large enough, the transistor Q6 outputs a high level, and vice versa, the output is low level, and the button K3 is an IR light forcing the key, and another composite function of the button is a short press to open And the 2 minute no-key operation automatic shutdown function of the night vision device is turned off, R3, R16, D2, E2 constitute the reset circuit of the MCU; the voltage regulator unit uses the ASM117-5.0 voltage regulator chip to provide 5V voltage for the MCU, using ASM117- 3.3 The voltage regulator chip provides 3.3V voltage to the MCU; the function indication unit includes the power on key K4, and the D7 is a red LED. As the IR function indicator, the two-color common anode LED1 is used to indicate the power supply and the automatic shutdown of the buttonless operation for 2 minutes. These two LEDs are driven by pins 12 and 13 of the MCU through transistors Q7 and Q8. The microcontroller unit receives the decoded television signal from the decoder chip TVP5150, and the MCU accepts level control signals from the buttons PB1, PB2 and PB3 to provide DE, and R7 and E4 form a pair of MCUs. The reset circuit, X2, C14 and C15 constitute an external clock circuit of the MCU; the micro display unit adopts MT7DMQV3A, the connection between the display and the decoder chip Tvp5150 is l-12Pin pin, Pinl is the line synchronization signal Hd, and Pin2 is the horizontal synchronization signal Vd Pin3 is the clock signal Clock signal input, Pin4—Pinl2 is the eight video signal lines, Pinl8 is connected to the +5V power supply for the internal three primary color LEDs, Pin20 is connected to the +2.5V power supply for the internal registers and ROM, Pinl9 and Pin21 are the ground wires. Pinl3—Pinl7 are respectively SDAT, SCK, SEN, SOUY and REST, respectively connected to the MCU; the video signal decoder unit uses a low power decoding chip TVP5150, the chip Pinl input video composite signal, Rl, R2 and C5 constitute Input voltage limiting circuit, Pin2 is another video signal input channel. When not in use, pull down with R3 resistor. Pin5 and Pin6 are the input and output terminals of the chip oscillator circuit. XI, C11 and C12 form the oscillation circuit, and R6 and C13 form the decoder. The reset circuit, Pinl 1 - Pinl 8 is the video data output after the eight Bit decoding, Pin21 and Pin22 are the I2C communication data port of the decoder and MCU, R4 and R5 Two pull-up resistors required by the I2C protocol, diodes D1 and D2 act as a blocking function, Cl, C2, C3, C4, C6 and C7 are external bypass or filter capacitors of the decoder; in the decoding power supply unit, XC6203E332PF and The XC6204182MR is a 3.3V and 1.8V regulator chip. The D3 diode is stepped down to 3.3V to form a +2.5V voltage. El, E2, E3, E5 and C9 are filter capacitors. The beneficial effects of the utility model are as follows: The night vision device circuit adopts a combination of CCD chips, which can ensure image acquisition in a light environment, and the night vision device has an infrared light source built therein, and a light image with light and low light. In the case of pure black, it is a black-and-white image. The viewing distance of the light environment is infinity, more than 600 meters under low light, and less than 250 meters in pure black environment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a basic frame diagram of a night vision device circuit of the utility model; FIG. 2 is a schematic circuit diagram of a utility model CCD power supply unit; FIG. 3 is a schematic diagram of a CCD sensor circuit of a utility model CCD signal processing unit; Schematic diagram of the new CCD signal processing unit CXD2163BR; Figure 5 is a schematic diagram of the utility model of the power input unit; Figure 6 is a schematic diagram of the built-in IR and control unit circuit of the utility model; 7 is a schematic diagram of a utility unit booster unit circuit; FIG. 8 is a circuit diagram of a utility model image phase conversion and control unit; FIG. 9 is a circuit diagram of a utility model ambient brightness detecting unit; FIG. 10 is a utility model function indicating unit circuit principle Figure 11 is a schematic diagram of a utility model image decoding and display circuit. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described below in conjunction with the accompanying drawings. As shown in FIG. 1, the portable day and night night vision circuit of the present invention comprises a CCD imaging circuit, a power supply and a main control circuit, and an image decoding and display circuit. The CCD imaging circuit includes a CCD signal processing unit and a CCD power supply unit, and the CCD signal processing unit acquires image information through the CCD chip, and performs picking, amplifying, A/D, D/A processing operations on the acquired image information, and The formed color image is phase corrected and output, and the CCD power supply unit provides a stable operating voltage for the CCD chip. The power supply and main control circuit includes an MCU control unit, a power input unit, a built-in IR and control unit, a boosting unit, an image phase conversion and control unit, an ambient brightness detecting unit, a voltage stabilizing unit and a function indicating unit, and the MCU control unit controls each Unit power supply, image signal transmission, built-in IR-assisted illumination and ambient brightness detection, power input unit for power supply of night vision device, voltage regulator unit provides stable driving voltage for IR lamp, built-in IR and control unit For the night vision device to provide infrared light source in the dark environment, the boosting unit provides suitable voltage and current for the CCD imaging circuit, and the image phase conversion and control unit is the interface of the CCD imaging circuit, the power supply and the main control circuit and the image decoding and display circuit. The ambient brightness detecting unit is configured to detect the brightness of the application environment of the night vision device, and the function indicating unit is configured to display the working state of the night vision device. The image decoding and display circuit includes a microcontroller unit, a microdisplay unit, a video signal decoder unit, and a decoding power unit. As shown in Fig. 2, in the CCD power supply unit circuit, the CCD chip and the power supply and the main control circuit are connected by a 3PIN cable, which are respectively +10V, GND and VIDEO. The DC9V-12V power supply from the power supply and the main control circuit is input from the power port of the 3PIN cable, and is connected via the anti-missing circuit 1N5819. In this circuit, the voltage regulator chip 603P332MR, 78L15, buck chip MP1410ES, half bridge and 7.5V Zener, and other inductors, electricity Resistor and capacitor parts. The 9V-12V power supply enters through the cable CN9, passes Dll (1N5819) one-way, C58, C80 and C138 filter and splits into two paths, one through C53 filter, D5 half-bridge BAV99 boost, through C66, inductor L3, C9 and C20 consists of π-type filter circuit filtering, and then U8 (78L15) voltage regulator to form +15V power supply; the other way through U9 (MP1401ES) step-down and then split into two, one way through R8 and C51 with D5 half-bridge BAV99 boost, C50 and D6 half-bridge boost, C51 filter, R19 current limit, boost D7 regulator, L5, C70, C21 and C22 IT-type filter circuit filters to form -7V power supply; the other passes D8 regulator, L4 /L2 high frequency choke, C7 and C5 filtered output +5V power supply. C5, C58, C59 and C72 cooperate with L4 filter, R18 and R33 divide voltage provide feedback sampling for MP1401ES, R171 is U9's enable current limiting resistor, C56 and C61 are U9 channel capacitance, C50 and R135 form series harmonic absorption The network protects the internal MOS tube. U8 (603P332MR) is a 3.3V regulator chip. Ll, C1 and C69 and L7, C20, C42 and C43 each form a π-type filter network filter, which outputs a 3.3V power supply. These power supplies provide suitable stable operating voltage and current for CCD chip ICX259AK, sequential circuit CXD2480R, AGC control A/D converter chip CXA2006Q and DSP chip CXD2163BR. As shown in FIG. 3 and FIG. 4, the CCD signal processing unit circuit is based on the DSP chip CXD2163BR, and performs image information pickup, amplification, A/D and D/A conversion processing under the control thereof, and finally forms a color image output to The back end performs phase correction and outputs. The 1/3-inch CCD sensor ICX259AK in Figure 3 is used to acquire image information. The chip transmits the level change of the image information to the CXD2480R chip in real time according to the timing of the CXD2480R. The CXD2480R chip is compatible with the external crystal and the DSP chip CXD2163BR. The timing drive signal of the CCD sensor, the CXA2006Q chip quantizes the analog image signal picked up by the CCD in cooperation with the DSP chip CXD2163BR, and provides a synchronous AGC signal. Figure 5 is the core device of the whole CCD chip. The device controls the timing chip to generate timing for the CCD chip under the cooperation of the external crystal, and amplifies the analog image signal to generate the AGC signal, and then performs A/D conversion on the analog image signal. The SNC33840 chip stores the quantized digital signal. The NJM2274R is used to D/A convert the digital image signal processed by CXD2163BR to form a composite analog TV signal, and finally output by the 3rd and 4th pins. The power supply and the main control circuit control core use the 8-bit MCU chip EM78P156EL as the control platform for various functions control. The main control circuit is characterized by using a low-cost single-chip microcomputer to generate PWN to drive an 850mm/940mm infrared lamp, and the light is matched with the optical device. The distance is up to 150 meters. Compared with other outdoor night vision equipment, the auxiliary lighting uses more than 10 850mm/940mm infrared lamps with low cost and low cost. Similarly, the main control circuit has the characteristics of power saving and high efficiency under the cooperation of the software. The circuit also uses a low-cost 34063 chip boost circuit for CCD power supply, video channel gain amplification and monitor video output port, power supply, IR lamp and power saving mode indication, battery and adapter dual power supply design. As shown in Figure 5, the power supply unit of the power supply and the main control circuit. When the power button is pressed, the Q9 conduction relay is energized. When the MCU is driven by the 11th pin, the Q9 will continue to conduct to the saturation relay. The suction is locked, the whole machine is stably powered. When the power button is pressed again, the MCU pin 17 detects the power-off signal, the 11-pin output is low, and Q1 is off, causing the Q9 to be discharged from the relay coil to the power-off contact. The purpose of a complete power outage. As shown in Figure 6, the built-in IR and control unit circuit, ASM117-5.0 is a voltage regulator chip, providing a stable driving voltage for the IR lamp, CN4 is the interface of the external IR lamp, Q3, Q5, Q10 and MCU seventh leg constitute The driving circuit of the IR lamp is controlled by software to generate 80-110 Hz PWN signal to drive the IR lamp. The DOWN and UP buttons provide the MCU with the IR lamp brightness control signal, DOWN is the subtraction control, UP is the plus control, and the whole is When the machine is powered on, the brightness of the IR lamp is 50% by default. As shown in Figure 7, the booster unit circuit, in this example, 5V liters 9V-10V, the circuit provides the appropriate voltage and current for CCD imaging, the circuit is composed of MC34063 chip and peripheral circuits, the efficiency is 70%. P6 output 9V-10V, where L1 is the energy storage inductor, D6 is the high frequency rectifier tube, R21, R28, R31, R27 and R*5 form a voltage divider sampling circuit for adjusting the boost output, E9, E10, E12, C3, C5 and B C9 form a filter circuit to reduce the ripple of the power supply and clean the power supply. Figure 8 shows the image phase conversion and control unit circuit. In this example, the CCD image input power supply and the main control circuit, and the power supply and the main control circuit output the image to the microdisplay interface. The circuit also includes the image pair. The inverting and image extinguishing circuit, CN1 is a video image output port, which can be used as the signal source of the external monitor. The transistor Q2 and the peripheral resistor container constitute an image phase conversion circuit, when the image phase of the CCD and the microdisplay are required. When the phase is opposite, the circuit must be applied. The transistor Q4 and the MCU pin 10 constitute the image extinction circuit. When the timing is 13 seconds before the timing is reached, the circuit will extinguish the image and the user will be blank. Press the DOWN and UP buttons to release the black screen. As shown in FIG. 9, the ambient brightness detecting unit circuit includes the four parts of the brightness detection, forced switching IR lamp, MCU reset and MCU power supply voltage regulation in this example. Transistor Q6, Peripheral Devices and MCU 8th The foot constitutes a brightness detection circuit, and its function detects the brightness of the application environment of the night vision device. When the brightness is insufficient, the MCU will automatically turn on the IR lamp. When the brightness is sufficient, the MCU will automatically turn off the IR lamp. The CN5 is connected to the photo sensor, and the button K3 is the key to the IR lamp. Long press in strong brightness environment can force the IR light to be turned on and off. Another composite function of this button is to press and turn the night vision device on and off for 2 minutes. The auto power off function without button operation, the night vision device is powered on. By default, this function operates. The ASM117-3.3 chip is a 3.3V regulator chip that supplies power to the MCU. R3, R16, D2, and E2 form the reset circuit of the MCU. As shown in Figure 10, the function indication unit circuit includes the power on key K4, D7 (red LED) is the IR function indicator, and the two-color common anode LED1 is used to indicate the power supply and the 2-minute no-button operation automatic shutdown function indication. The LEDs are driven by pins 12 and 13 of the MCU through transistors Q7 and Q8. Figure 11 shows an image decoding and display circuit comprising a microcontroller unit, a microdisplay unit, a video signal decoder unit and a decoding power unit. The decoding driving method of the utility model is an 8-bit MCU chip AT89C2051+TVP5150+MT7DMQV3A to form a video decoding circuit, which drives Displaytech's 0.2-inch microdisplay. The micro display unit adopts the MT7DMQV3A signal display. The connection between the display and the decoder chip Tvp5150 is 1-12 pin pin, Pinl is the line sync signal Hd, Pin2 is the horizontal sync signal Vd, Pin3 is the clock signal Clock signal input, Pin4_Pin2 is 8 Root video signal lines, these signals are generated by the decoder under the control of the MCU, and input to the display to display images in parallel. PinL8 of the display is connected to +5V power supply for internal three primary color LEDs, Pin20 is connected to +2.5V power supply for internal registers and ROM, Pinl9 and Pin21 are ground wires, Pinl3-Pinl7 are SDAT, SCK, SEN, SOUY and B REST, respectively. These five wires are connected to the MCU for communication according to the SPI bus protocol, and the relevant registers inside the display are set by software programming to make it work normally. In the video signal decoder unit circuit, the TVP5150 is a low-power decoding chip of Texas company. The chip inputs the video composite signal, Rl, R2 and C5 form the input voltage limiting circuit, and Pin2 is another video signal input channel. Pull down with R3 resistor, Pin5 and Pin6 are the input and output terminals of the chip oscillator circuit, XI, C11 and C12 form the oscillation circuit, and R6 and C13 form the reset circuit of the decoder. 3⁄4111 one? 0118 is 88 decoded video data output, Pin21 and Pin22 are I2C communication data ports of decoder and MCU, R4 and R5 are two pull-up resistors required by I2C protocol, diodes D1 and D2 function as blocking, due to decoder Unlike the MCU's I/O port voltage, Cl, C2, C3, C4, C6, and C7 are external bypass or filter for the decoder. Wave capacitance. The decoder chip TVP5150 and the MCU communicate according to the I2C bus protocol, and the MCU sets its internal related register value to receive the video signal that meets the requirements, and decodes the video signal to form a digital image that can be used for receiving and displaying the image by the micro display unit. signal. The micro display unit and the MCU communicate according to the SPI bus protocol. By setting the internal register of the display and the E2ROM to operate in a mode that accepts the TV signal of the CCIR656 format, the decoded television signal from the decoder chip TVP5150 is received; the MCU also accepts the button. PB1, PB2, and B PB3 (brightness, color, and contrast) provide low-level control signals. The MCU sets the TVP5150's related registers to adjust brightness, color, and contrast. R7 and E4 form the reset circuit of the MCU, X2. C14 and C15 form the external clock circuit of the MCU. The XC6203E332PF and XC6204182MR in the decoding power supply unit are 3.3V and 1.8V regulator chips. The chip steps down and regulates the +5V power supply to provide stable two sets of operating voltages for the decoder. The micro display requires two sets of working power, one The group is +5V, and the other group of 2.5V voltage is obtained by stepping down the 3.3V output of the voltage regulator chip XC6203E332PF via diode D3. El, E2, E3, E5, and C9 are filter capacitors that function to unwind and filter out power supply ripple.

Claims

Claim

A portable day and night night vision circuit, comprising: an imaging circuit for acquiring an image; an image decoding and display circuit for decoding an image obtained by the imaging circuit and displaying the image; a power supply and a main control circuit for providing control of various application functions of the power supply and the image signal channel and the whole machine for the imaging circuit and the image decoding and display circuit, wherein the imaging circuit is a CCD imaging circuit, The image decoding and display circuit uses a microdisplay to output a color image in a light and low light environment.

2. The portable day and night night vision device circuit according to claim 1, wherein the CCD imaging circuit comprises a CCD signal processing unit and a CCD power supply unit, and the CCD signal processing unit acquires image information through the CCD chip, and The acquired image information is subjected to picking, amplifying, A/D and D/A processing operations, and phase correction and output are performed on the formed color image, and the CCD power supply unit provides a stable operating voltage for the CCD chip; the power supply and the main control The circuit comprises an MCU control unit, a power input unit, a built-in IR and control unit, a boosting unit, an image phase conversion and control unit, an ambient brightness detecting unit, a voltage stabilizing unit and a function indicating unit, and the MCU control unit controls the power supply of each unit. , image signal transmission, built-in IR-assisted illumination and ambient brightness detection, power input unit for power supply of night vision device, voltage regulator unit provides stable 0V-3V drive voltage for IR lamp, and provides stable 3.3 for MCU V working voltage, built-in IR and control unit for the night vision device to provide auxiliary red in the dark environment and low light environment The light source, the boosting unit provides suitable voltage and current for the CCD imaging circuit, and the image phase conversion and control unit provides correct image phase information for the image decoding and display circuit, and serves as the power and image signal interface for the image decoding and display circuit. The ambient brightness detecting unit is configured to detect the brightness of the application environment of the night vision device, provide information for the MCU to automatically turn on and off the IR infrared light source, and the function indicating unit is configured to display various working states of the night vision device; The image decoding and display circuit comprises a microcontroller unit, a micro display unit, a video signal decoder unit and a decoding power supply unit. The microcontroller unit controls the micro display unit and the video signal decoder unit to operate normally by software instructions, and the micro display unit Receiving image information from the video signal decoder unit and displaying the image under the control of the MCU, the video signal decoder unit receives the composite television signal and decodes the signal under the control of the MCU and sends the display, and the decoding power supply unit provides +5V , +3.3V, +2.8V, +2.5V and +1.8V qualified power supplies.

3. The portable day and night night vision device circuit according to claim 2, wherein said CCD chip comprises CXD2163BR, CXD2006 and CXD2480R+ICX259.

4. The portable day and night night vision device circuit according to claim 3, wherein the CCD signal processing unit takes CXD2163BR as a core, acquires image information by the CCD sensor ICX259AK, and performs image information in real time according to the timing of the CXD2480R. The level change is transmitted to the CXD2480R. The CXD2480R generates a timing drive signal corresponding to the CCD sensor in cooperation with the external crystal and the DSP chip CXD2163BR. The CXA2006Q chip quantizes the analog image signal picked up by the CCD in the cooperation of the DSP chip CXD2163BR, and provides AGC. Signal, CXD2163BR A/D conversion of analog image signal, SNC33840 chip stores the quantized digital signal, NJM2274R is used for D/A conversion of digital image signal processed by CXD2163BR to form composite analog TV signal, finally by 3, 4 pin output; In the CCD power supply unit, the connection between the CCD chip and the power supply and the main control circuit is three PIN cables, which are +10V, GND and VIDEO respectively, and the DC9V-12V power supply from the power supply and the main control circuit is The power port input of the three PIN cable is connected to the error-proof circuit 1N5819. In this circuit, the voltage regulator chip 603P332MR, 78L09, buck chip MP1410ES, half bridge and 7.5V voltage regulator and other inductors, resistors, and capacitors are used to boost, step down, regulate, and process the power supply. , respectively, +15V, -7V, +5V, +3.3V, of which +3.3V has two ways, for CCD chip CCD sensor ICX259AK, sequential circuit CXD2480R, AGC controller A/D conversion chip CXA2006Q and DSP chip CXD2163BR Suitable for stable working voltage and current.

The portable day and night night vision device circuit according to claim 4, wherein the MCU control unit is an 8-bit MCU chip EM78P156EL; In the power input unit, when the power button is pressed, the Q9 conduction relay is electrically connected to the whole machine. When the MCU is driven by the 11th foot, the Q9 will continue to be turned on to the saturation relay to be locked, and the whole machine is stably powered. When the power button is pressed again, the 17th pin of the MCU detects the power-off signal, the 11-pin output is low, and the Q1 is turned off, causing the Q9 to be discharged as the power-off contact of the relay coil reaches the complete power-off of the whole machine; In the control unit, CN4 is the interface of the external IR lamp, Q3, Q5, Q10 and B MCU The seventh leg constitutes the driving circuit of the IR lamp, and the DOWN and UP buttons provide the MCU with the control signal of the IR lamp brightness, according to the observation target. The distance can dynamically adjust the IR lamp output power; the boosting unit is composed of MC34063 and peripheral circuits, P4 input +5V power supply, P6 output 9V-10V, where L1 is the energy storage inductor, D6 is the high frequency rectifier tube, R21, R28 , R31, R27 and R*5 form a voltage dividing sampling circuit, E9, E10, E12, C3, C5 and C9 constitute a filtering circuit; the image phase conversion and control unit comprises a video image output port CN1, a transistor Q2 and a peripheral damper Piece of composition Like the phase conversion circuit, the transistor Q4 and the MCU pin 10 constitute an image extinction circuit; in the ambient brightness detecting unit, the transistor Q6, the peripheral device resistors R24, R25, R26 and B MCU pin 8 constitute a brightness detecting circuit, CN5 external photosensitive Sensor, when the ambient brightness is large enough, the transistor Q6 outputs a high level, and vice versa. The button K3 is the IR light forced open key. Another composite function of the button is a short press to turn the night vision device on and off for 2 minutes. Key operation automatic shutdown function, R3, R16, D2, E2 constitute the MCU reset circuit; The voltage regulator unit uses ASM117-5.0 regulator chip to provide 5V voltage for MCU, and ASM117-3.3 regulator chip provides 3.3V for MCU Voltage; The function indication unit includes a power on key K4, D7 is a red LED, as an IR function indicator, the two-color common anode LED1 is used to indicate power and automatic shutdown for 2 minutes without button operation, the two LEDs pass through the transistors Q7 and Q8 Driven by the 12th and 13th feet of the MCU.

6. The portable day and night night vision device circuit according to claim 5, wherein the microcontroller unit receives the decoded television signal from the decoding chip TVP5150, and the MCU accepts the buttons from the buttons PB1, PB2 and PB3. Provide DE level control signals, .R7 and E4 form the MCU The reset circuit, X2, C14 and C15 constitute an external clock circuit of the MCU; the micro display unit adopts MT7DMQV3A, the connection between the display and the decoder chip Tvp5150 is l-12Pin pin, Pinl is the line synchronization signal Hd, and Pin2 is the horizontal synchronization signal Vd Pin3 is the clock signal Clock signal input, Pin4—Pinl2 is the eight video signal lines, Pinl8 is connected to +5V power supply for internal three primary color LEDs, Pin20 is connected to +2.5V power supply for internal registers and ROM, Pinl9 and Pin21 are ground Pinl3—Pinl7 is SDAT, SCK, SEN, SOU Y and B REST, respectively connected to the MCU; the video signal decoder unit uses a low power decoding chip TVP5150, the chip Pinl input video composite signal, Rl, R2 and C5 constitutes the input voltage limiting circuit, Pin2 is another video signal input channel. When not in use, R3 resistor pulls down. Pin5 and Pin6 are the input and output terminals of the chip oscillator circuit. XI, C11 and C12 form the oscillation circuit. R6 and C13 form The reset circuit of the decoder, Pinll-Pin 8 is the video data output after the eight Bit decoding, Pin21 and Pin22 are the I2C communication data port of the decoder and MCU, R4 and BR 5 is two pull-up resistors required by the I2C protocol, diodes D1 and D2 act as a blocking function, and Cl, C2, C3, C4, C6 and C7 are external bypass or filter capacitors of the decoder; The XC6203E332PF and XC6204182MR are 3.3V and 1.8V regulator chips. The D3 diodes step down to 3.3V to form +2.5V. El, E2, E3, E5 and C9 are filtered.