CN209196630U

CN209196630U - A kind of track lamp of arm universal adjustment

Info

Publication number: CN209196630U
Application number: CN201822053379.9U
Authority: CN
Inventors: 覃立英; 覃宏源
Original assignee: Zhongshan Blue Lighting Technology Co Ltd
Current assignee: Zhongshan Blue Lighting Technology Co Ltd
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2019-08-02
Anticipated expiration: 2028-12-07

Abstract

The utility model discloses a kind of track lamps of arm universal adjustment, including guide rail box, driving power box and lamp body, lamp body includes lamp housing, lamp housing connects lamp housing by universal regulating mechanism, driving power box is internally provided with driving power, driving power is provided with sequentially connected bridge rectifier filter circuit, voltage regulator circuit, light adjusting circuit, universal regulating mechanism includes the first arm, second arm and third arm, first arm and the first hinged seat hingedly rotate lamp body, second hinged seat, second arm and third arm swing up and down lamp body, to realize the irradiating angle of universal adjustment track lamp, simply, it is convenient, meet the lighting requirement of the important events such as market hotel, use scope is wider, in addition, light adjusting circuit has automatic regulating lightness, constant luminance, manually adjust three modes of brightness, it can root It is selected according to actual needs, it is more intelligent, it is more convenient.

Description

A kind of track lamp of arm universal adjustment

Technical field

The utility model relates to a kind of track lamp, especially a kind of track lamp of arm universal adjustment.

Background technique

Track lamp uses widely, but general track lamp can only adjust irradiating angle by a small margin, cannot arbitrarily adjust Whole irradiating angle, is not able to satisfy the lighting requirement of the important places such as market, hotel, and use scope is limited.

In addition, general track lamp operating mode is relatively simple, usually with the same Brightness Duty, but only with same A Brightness Duty is not able to satisfy the occasion of some special scenes, and use scope is limited.

Summary of the invention

For overcome the deficiencies in the prior art, the utility model provides a kind of leading for simply and easily arm universal adjustment Rail lamp.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of track lamp of arm universal adjustment, including guide rail box, driving power box and lamp body, the driving power box The back side is provided with the groove for installing the guide rail box, and the lamp body includes lamp housing, and the lamp housing is connected by universal regulating mechanism The lamp housing, the driving power box are internally provided with driving power, and the driving power is provided with sequentially connected bridge-type Current rectifying and wave filtering circuit, voltage regulator circuit, light adjusting circuit.

The universal regulating mechanism includes the first arm, the second arm and third arm, and the top sides edge of the lamp housing is set It is equipped with installing port, is provided with the first hinged seat in the installing port, first hinged seat passes through the first articulated shaft and described the One end of one arm is hinged, and one end of second arm is provided with interconnecting piece, and the end face of the interconnecting piece is provided with through-hole, institute The other end for stating the first arm is connect after the through-hole with nut thread, and the other end of second arm passes through the second hinge Spindle and one end of the third arm are hinged, and the front of the driving power box 2 is provided with the second hinged seat, the third lamp The other end of arm is hinged by third articulated shaft 17 and second hinged seat.

The inside of the lamp housing is disposed with heat radiation module, reflector, annulus, the reflector and heat dissipation from top to bottom Partition is provided between mould group, the bottom of the partition is provided with LED light source, and first hinged seat and heat radiation module are mounted on The top of the partition is provided with the lamp hole exposed for the light of the LED light source at the top of the reflector.

The bottom of the reflector is provided with the mounting portion of annular, be equidistantly provided on the mounting portion installation gap and Taper liner block, the inner wall of the annulus are provided with the first protruding block and are used to support the supporting block of the mounting portion, and described first is convex Gap is remained between the top of bittiness bottom and supporting block, after assembly, the taper liner block is stuck in first protruding block Between bottom and the top of supporting block.

Be equidistantly provided with several the second protruding blocks in the bottom interior wall of the lamp housing, the outer wall of the annulus from it is lower to On the second detent portion for being disposed with the first detent portion and being arranged at equal intervals, the top in first detent portion and the second detent Spacing is remained between the bottom in portion, after assembly, second protruding block is located at top and second card in first detent portion Between the bottom in position portion, the top in first detent portion is close to the bottom of the lamp housing.

The bridge rectifier filter circuit includes interface USB, fuse F1, switch S1, rectifier bridge DB1, inductance L1, polarity Capacitor C1 and polar capacitor C2；Described in the input terminal A1 of the rectifier bridge DB1 passes sequentially through the switch S1, fuse F1 connects 1 pin of interface USB, the input terminal A2 of the rectifier bridge DB1 connect 2 pins of the interface USB, and the rectifier bridge DB1 is just Pole output end connects the voltage regulator circuit by the inductance L1, and the cathode output end of the rectifier bridge DB1 connects the polar capacitor The cathode of C2；The anode of the polar capacitor C2 connects the node between the voltage regulator circuit and inductance L1；The polar capacitor C1 Anode connect the node between the cathode output end and inductance L1 of the rectifier bridge DB1, the cathode of the polar capacitor C1 meets institute State the node between the cathode output end of rectifier bridge DB1 and the cathode of polar capacitor C2.

The voltage regulator circuit includes voltage stabilizing chip U1 and polar capacitor C3；1 pin of the voltage stabilizing chip U1 connects the electricity Feel the node between L1 and the anode of polar capacitor C2, the cathode that 2 pins of the voltage stabilizing chip U1 meet the rectifier bridge DB1 is defeated 3 pins of the node between outlet and the cathode of polar capacitor C2, the voltage stabilizing chip U1 connect the light adjusting circuit；The polarity The anode of capacitor C3 connects the node between 3 pins and light adjusting circuit of the voltage stabilizing chip U1, the cathode of the polar capacitor C3 Connect the node between 2 pins of the voltage stabilizing chip U1 and the cathode output end of rectifier bridge DB1.

The light adjusting circuit include resistance R1, adjustable resistance R2, amplifier U2, photo resistance R3, resistance R4, diode D1, Capacitor C4, resistance R7, thyristor D2, switch S2, resistance R5 and capacitor C5；The anode of the thyristor D2 connects the polar capacitor Node between the anode of C3 and 3 pins of voltage stabilizing chip U1；The anode that the cathode of the thyristor D2 connects the LED light source connects Enter end；The output of the amplifier U2 terminates the anode of the diode D1, and the cathode of the diode D1 meets the thyristor D2 Control electrode；The cathode access of the LED light source terminates the cathode output end of the rectifier bridge DB1 and the cathode of polar capacitor C3 Between node；The cathode power supply input of the amplifier U2 terminates the anode of the thyristor D2 and 3 pins of voltage stabilizing chip U1 Between node, the negative power supply input of the amplifier U2 terminates the cathode incoming end and rectifier bridge DB1 of the LED light source Node between cathode output end；The same phase incoming end of the amplifier U2 divides two-way, connects the crystalline substance by the resistance R1 all the way Node between the anode of brake tube D2 and 3 pins of voltage stabilizing chip U1, another way connect one end of the switch S2；The resistance R4 The anode of a termination diode D1 and the output end of amplifier U2 between node, the other end of the resistance R4 passes through institute It states resistance R5 and connects node between the cathode incoming end of LED light source and the cathode output end of rectifier bridge DB1；The amplifier U2's Anti-phase input terminates the node between the resistance R4 and resistance R5；The cathode of a termination diode D1 of the capacitor C4 Node between the control electrode of thyristor D2, the cathode incoming end of another termination LED light source of the capacitor C4 and whole Flow the node between the cathode output end of bridge DB1；The other end of the switch S2 can choose with the adjustable resistance R2 One end of one end or the resistance R7 of one end or the photo resistance R3 connects；The second termination of the adjustable resistance R2 Node between the cathode incoming end of the LED light source and the cathode output end of rectifier bridge DB1, the sliding of the adjustable resistance R2 Terminate the node between the resistance R5 and the cathode output end of rectifier bridge DB1；Described in another termination of the photo resistance R3 Node between the negative power supply incoming end of amplifier U1 and the cathode output end of rectifier bridge DB1；A termination institute of the resistance R6 The node between the cathode of thyristor D2 and the positive incoming end of LED light source is stated, the other end of the resistance R6 passes through the electricity Hold C5 and connects the node between the cathode incoming end of the LED light source and the cathode output end of rectifier bridge DB1；The resistance R7's is another Node between the cathode incoming end of the one termination LED light source and the cathode output end of rectifier bridge DB1；The rectifier bridge DB1 Cathode output end and LED light source cathode incoming end between node ground connection.

The beneficial effects of the utility model are: the utility model is provided with several arms, wherein the first arm and first Hinged seat hingedly rotates lamp body, and the second hinged seat, the second arm and third arm swing up and down lamp body, It is simply, convenient to realize the irradiating angle of universal adjustment track lamp, meet the lighting requirement of the important events such as market hotel, Use scope is wider.

In addition, light adjusting circuit has automatic regulating lightness, constant luminance, manually adjusts three modes of brightness, user can root It is selected according to actual needs, it is more intelligent, it is more convenient.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the exploded view of the utility model；

Fig. 3 is the partial structure diagram of the utility model；

Fig. 4 is the top view of the second arm；

Fig. 5 is the structural schematic diagram of lamp housing；

Fig. 6 is the schematic block circuit diagram of driving power；

Fig. 7 is the circuit diagram of driving power.

Specific embodiment

Referring to Figure 1 to Figure 7, a kind of track lamp of arm universal adjustment, including guide rail box 1, driving power box 2 and lamp body, The back side of the driving power box 2 is provided with the groove 3 for installing the guide rail box 1, and the lamp body includes lamp housing 4, the lamp housing 4 The lamp housing 4 is connected by universal regulating mechanism, the driving power box 2 is internally provided with driving power 5, the driving electricity Source 5 is provided with sequentially connected bridge rectifier filter circuit, voltage regulator circuit, light adjusting circuit；The universal regulating mechanism includes the One arm 6, the second arm 7 and third arm 8, the top sides of the lamp housing 4 are set in the installing port 9 along installing port 9 is provided with It is equipped with the first hinged seat 10, first hinged seat 10 is hinged by one end of the first articulated shaft 11 and first arm 6, One end of second arm 7 is provided with interconnecting piece 12, and the end face of the interconnecting piece 12 is provided with through-hole 13, first arm 6 other end is threadedly coupled after passing through the through-hole 13 with nut 14, and the other end of second arm 7 passes through the second articulated shaft 15 is hinged with one end of the third arm 8, and the front of the driving power box 2 is provided with the second hinged seat 16, the third The other end of arm 8 is hinged by third articulated shaft 17 and second hinged seat 16；First arm 6 and the first hinged seat 10 rotate the lamp body, and second hinged seat 16, the second arm 7 and third arm 8 make the lamp body It can swing up and down, thus realize the irradiating angle of universal adjustment track lamp, it is simply, convenient, it is important to be able to satisfy market hotel etc. The lighting requirement of occasion, use scope are wider.

The inside of the lamp housing 4 is disposed with heat radiation module 18, reflector 19, annulus 20, the reflection from top to bottom It is provided with partition 21 between cup 19 and heat radiation module 18, the bottom of the partition 21 is provided with LED light source, first hinged seat 10 and heat radiation module 18 be mounted on the top of the partition 21, the top of the reflector 19 is provided with for the LED light source The exposed lamp hole 22 of light, the heat radiation module 18 can be the radiating fin being arranged at equal intervals, and assembly is simple, convenient.

The bottom of the reflector 19 is provided with the mounting portion 23 of annular, is equidistantly provided with installation on the mounting portion 23 Notch 24 and taper liner block 25, the inner wall of the annulus 20 are provided with the first protruding block 26 and are used to support the mounting portion 23 Supporting block 27 remains with gap between the bottom of first protruding block 26 and the top of supporting block 27, after assembly, the taper liner Block 25 is stuck between the bottom of first protruding block 26 and the top of supporting block 27.

Several second protruding blocks 28, the outer wall of the annulus 20 are equidistantly provided in the bottom interior wall of the lamp housing 4 The the second detent portion 30 for being disposed with the first detent portion 29 from top to bottom and being arranged at equal intervals, the top in first detent portion 29 Spacing is remained between portion and the bottom in the second detent portion 30, after assembly, second protruding block 28 is located at first detent Between the top in portion 29 and the bottom in the second detent portion 30, the top in first detent portion 29 and the bottom of the lamp housing 4 are tight Patch.

The bridge rectifier filter circuit includes interface USB, fuse F1, switch S1, rectifier bridge DB1, inductance L1, polarity Capacitor C1 and polar capacitor C2；The input terminal A1 of the rectifier bridge DB1 passes sequentially through the switch S1, fuse F1 connects described connect 1 pin of mouth USB, the input terminal A2 of the rectifier bridge DB1 connect 2 pins of the interface USB, the anode of the rectifier bridge DB1 Output end connects the voltage regulator circuit by the inductance L1, and the cathode output end of the rectifier bridge DB1 meets the polar capacitor C2 Cathode；The anode of the polar capacitor C2 connects the node between the voltage regulator circuit and inductance L1；The polar capacitor C1's Anode connects the node between the cathode output end and inductance L1 of the rectifier bridge DB1, and the cathode of the polar capacitor C1 connects described Node between the cathode output end of rectifier bridge DB1 and the cathode of polar capacitor C2；The rectifier bridge DB1 makes interface USB's Input voltage becomes the direct current of pulsation, and the π shape filter constituted by the inductance L1, polar capacitor C1 and polar capacitor C2 After wave circuit filtering, the direct current of pulsation is become stable direct current and is powered for the voltage regulator circuit, it is more stable.

The voltage regulator circuit includes voltage stabilizing chip U1 and polar capacitor C3；1 pin of the voltage stabilizing chip U1 connects the electricity Feel the node between L1 and the anode of polar capacitor C2, the cathode that 2 pins of the voltage stabilizing chip U1 meet the rectifier bridge DB1 is defeated 3 pins of the node between outlet and the cathode of polar capacitor C2, the voltage stabilizing chip U1 connect the light adjusting circuit；The polarity The anode of capacitor C3 connects the node between 3 pins and light adjusting circuit of the voltage stabilizing chip U1, the cathode of the polar capacitor C3 Connect the node between 2 pins of the voltage stabilizing chip U1 and the cathode output end of rectifier bridge DB1, the model of the voltage stabilizing chip U1 It can be LM7815 or LM7812, the 3 pins output stable DC of the voltage stabilizing chip U1 is light adjusting circuit confession Electricity, it is simply, convenient.

The light adjusting circuit include resistance R1, adjustable resistance R2, amplifier U2, photo resistance R3, resistance R4, diode D1, Capacitor C4, resistance R7, thyristor D2, switch S2, resistance R5 and capacitor C5；The anode of the thyristor D2 connects the polar capacitor Node between the anode of C3 and 3 pins of voltage stabilizing chip U1；The anode that the cathode of the thyristor D2 connects the LED light source connects Enter end；The output of the amplifier U2 terminates the anode of the diode D1, and the cathode of the diode D1 meets the thyristor D2 Control electrode；The cathode access of the LED light source terminates the cathode output end of the rectifier bridge DB1 and the cathode of polar capacitor C3 Between node；The cathode power supply input of the amplifier U2 terminates the anode of the thyristor D2 and 3 pins of voltage stabilizing chip U1 Between node, the negative power supply input of the amplifier U2 terminates the cathode incoming end and rectifier bridge DB1 of the LED light source Node between cathode output end；The same phase incoming end of the amplifier U2 divides two-way, connects the crystalline substance by the resistance R1 all the way Node between the anode of brake tube D2 and 3 pins of voltage stabilizing chip U1, another way connect one end of the switch S2；The resistance R4 The anode of a termination diode D1 and the output end of amplifier U2 between node, the other end of the resistance R4 passes through institute It states resistance R5 and connects node between the cathode incoming end of LED light source and the cathode output end of rectifier bridge DB1；The amplifier U2's Anti-phase input terminates the node between the resistance R4 and resistance R5；The cathode of a termination diode D1 of the capacitor C4 Node between the control electrode of thyristor D2, the cathode incoming end of another termination LED light source of the capacitor C4 and whole Flow the node between the cathode output end of bridge DB1；The other end of the switch S2 can choose with the adjustable resistance R2 One end of one end or the resistance R7 of one end or the photo resistance R3 connects；The second termination of the adjustable resistance R2 Node between the cathode incoming end of the LED light source and the cathode output end of rectifier bridge DB1, the sliding of the adjustable resistance R2 Terminate the node between the resistance R5 and the cathode output end of rectifier bridge DB1；Described in another termination of the photo resistance R3 Node between the negative power supply incoming end of amplifier U1 and the cathode output end of rectifier bridge DB1；A termination institute of the resistance R6 The node between the cathode of thyristor D2 and the positive incoming end of LED light source is stated, the other end of the resistance R6 passes through the electricity Hold C5 and connects the node between the cathode incoming end of the LED light source and the cathode output end of rectifier bridge DB1；The resistance R7's is another Node between the cathode incoming end of the one termination LED light source and the cathode output end of rectifier bridge DB1；The rectifier bridge DB1 Cathode output end and LED light source cathode incoming end between node ground connection；The light adjusting circuit have automatic regulating lightness, Constant luminance manually adjusts three modes of brightness；Selection is when manually adjusting luminance patterns, the other end of switch S2 with it is described adjustable The first end of resistance R2 connects, switch S2 closure, then described in the sliding end adjusting of the adjustable adjustable resistance R2 of user The output voltage of the output end of amplifier U2, changes the angle of flow size of the thyristor D2, to adjust the photograph of the LED light source The brightness of illumination for manually adjusting track lamp is realized in brightness；The amplifier U2, resistance R4 and resistance R5 constitute in-phase proportion operation Circuit；When selecting automatic regulating lightness mode, the other end of switch S2 is connect with one end of the photo resistance R3, and switch S2 is closed It closes, the both end voltage size of the photo resistance R3 determines the output voltage size of the output end of the amplifier U2, described in change The angle of flow size of thyristor D2 reaches the photograph of automatic adjustment track lamp to automatically adjust the brightness of illumination of the LED light source The effect of brightness, it is more intelligent；When selecting constant luminance mode, the other end of switch S2 is connect with one end of the resistance R7, Switch S2 closure, the output voltage of the amplifier U2 is constant, and the angle of flow of the thyristor D2 is constant, the photograph of the LED light source Brightness is constant, and track lamp is with the same Brightness Duty；The amplifier U2 can amplify input voltage；And the resistance R6 and Capacitor C5 can reduce the input current of the LED light source, to protect the LED light source.

Above embodiment cannot limit the protection scope of the invention, and the personnel of professional skill field are not departing from In the case where the invention general idea, the impartial modification and variation done still fall within the range that the invention is covered Within.

Claims

1. a kind of track lamp of arm universal adjustment, including guide rail box (1), driving power box (2) and lamp body, the driving power The back side of box (2) is provided with the groove (3) for installing the guide rail box (1), and the lamp body includes lamp housing (4), it is characterised in that institute It states lamp housing (4) to connect the lamp housing (4) by universal regulating mechanism, the driving power box (2) is internally provided with driving electricity Source (5), the driving power (5) are provided with sequentially connected bridge rectifier filter circuit, voltage regulator circuit, light adjusting circuit.

2. the track lamp of arm universal adjustment according to claim 1, it is characterised in that the universal regulating mechanism includes The top sides edge of first arm (6), the second arm (7) and third arm (8), the lamp housing (4) is provided with installing port (9), institute State and be provided with the first hinged seat (10) in installing port (9), first hinged seat (10) by the first articulated shaft (11) with it is described One end of first arm (6) is hinged, and one end of second arm (7) is provided with interconnecting piece (12), the interconnecting piece (12) End face is provided with through-hole (13), and the other end of first arm (6) passes through the through-hole (13) and connects afterwards with nut (14) screw thread It connects, the other end of second arm (7) is hinged by the second articulated shaft (15) and one end of the third arm (8), described The front of driving power box (2) is provided with the second hinged seat (16), and the other end of the third arm (8) passes through third articulated shaft (17) hinged with second hinged seat (16).

3. the track lamp of arm universal adjustment according to claim 2, it is characterised in that the inside of the lamp housing (4) is from upper Be disposed with heat radiation module (18), reflector (19), annulus (20) under, the reflector (19) and heat radiation module (18) it Between be provided with partition (21), the bottom of the partition (21) is provided with LED light source, first hinged seat (10) and heat radiation module (18) it is mounted on the top of the partition (21), is provided at the top of the reflector (19) outside the light for the LED light source The lamp hole (22) of dew.

4. the track lamp of arm universal adjustment according to claim 3, it is characterised in that the bottom of the reflector (19) It is provided with the mounting portion (23) of annular, is equidistantly provided with installation gap (24) and taper liner block (25) on the mounting portion (23), The inner wall of the annulus (20) is provided with the first protruding block (26) and is used to support the supporting block (27) of the mounting portion (23), institute It states and remains with gap between the bottom of the first protruding block (26) and the top of supporting block (27), after assembly, the taper liner block (25) It is stuck between the bottom of first protruding block (26) and the top of supporting block (27).

5. the track lamp of arm universal adjustment according to claim 4, it is characterised in that the bottom interior wall of the lamp housing (4) On be equidistantly provided with several the second protruding blocks (28), the outer wall of the annulus (20) is disposed with the first card from top to bottom Position portion (29) and the second detent portion (30) being arranged at equal intervals, the top in first detent portion (29) and the second detent portion (30) Bottom between remain with spacing, after assembly, second protruding block (28) be located at first detent portion (29) top and Between the bottom in the second detent portion (30), the top in first detent portion (29) is close to the bottom of the lamp housing (4).

6. the track lamp of arm universal adjustment according to claim 5, it is characterised in that the bridge rectifier filter circuit Including interface USB, fuse F1, switch S1, rectifier bridge DB1, inductance L1, polar capacitor C1 and polar capacitor C2；The rectification The input terminal A1 of bridge DB1 passes sequentially through the switch S1, fuse F1 connects 1 pin of the interface USB, the rectifier bridge DB1 Input terminal A2 connect 2 pins of the interface USB, the cathode output end of the rectifier bridge DB1 is connect described by the inductance L1 Voltage regulator circuit, the cathode output end of the rectifier bridge DB1 connect the cathode of the polar capacitor C2；The anode of the polar capacitor C2 Connect the node between the voltage regulator circuit and inductance L1；The anode that the anode of the polar capacitor C1 meets the rectifier bridge DB1 is defeated Node between outlet and inductance L1, the cathode of the polar capacitor C1 connect the cathode output end and polarity of the rectifier bridge DB1 Node between the cathode of capacitor C2.

7. the track lamp of arm universal adjustment according to claim 6, it is characterised in that the voltage regulator circuit includes pressure stabilizing Chip U1 and polar capacitor C3；1 pin of the voltage stabilizing chip U1 connects between the inductance L1 and the anode of polar capacitor C2 Node, 2 pins of the voltage stabilizing chip U1 connect between the cathode output end of the rectifier bridge DB1 and the cathode of polar capacitor C2 3 pins of node, the voltage stabilizing chip U1 connect the light adjusting circuit；The anode of the polar capacitor C3 meets the voltage stabilizing chip U1 3 pins and light adjusting circuit between node, the cathode of the polar capacitor C3 connects 2 pins and the rectification of the voltage stabilizing chip U1 Node between the cathode output end of bridge DB1.

8. the track lamp of arm universal adjustment according to claim 7, it is characterised in that the light adjusting circuit includes resistance R1, adjustable resistance R2, amplifier U2, photo resistance R3, resistance R4, diode D1, capacitor C4, resistance R7, thyristor D2, switch S2, resistance R5 and capacitor C5；The anode of the thyristor D2 connects the anode of the polar capacitor C3 and 3 pins of voltage stabilizing chip U1 Between node；The cathode of the thyristor D2 connects the positive incoming end of the LED light source；The output of the amplifier U2 terminates institute The anode of diode D1 is stated, the cathode of the diode D1 connects the control electrode of the thyristor D2；The cathode of the LED light source connects Enter the node between the cathode of the cathode output end and polar capacitor C3 that terminate the rectifier bridge DB1；The anode of the amplifier U2 Power input terminates the node between the anode of the thyristor D2 and 3 pins of voltage stabilizing chip U1, the cathode of the amplifier U2 Power input terminates the node between the cathode incoming end of the LED light source and the cathode output end of rectifier bridge DB1；The amplifier The same phase incoming end of U2 divides two-way, connects the anode of the thyristor D2 and 3 drawing for voltage stabilizing chip U1 by the resistance R1 all the way Node between foot, another way connect one end of the switch S2；The anode of a termination diode D1 of the resistance R4 and The other end of node between the output end of amplifier U2, the resistance R4 is accessed by the cathode that the resistance R5 connects LED light source Node between end and the cathode output end of rectifier bridge DB1；The anti-phase input of the amplifier U2 terminates the resistance R4 and resistance Node between R5；Section between the cathode of a termination diode D1 and the control electrode of thyristor D2 of the capacitor C4 Point, the section between the cathode incoming end of another termination LED light source and the cathode output end of rectifier bridge DB1 of the capacitor C4 Point；The other end of the switch S2 can choose one end with the first end of the adjustable resistance R2 or the photo resistance R3 Or one end connection of the resistance R7；The cathode incoming end of the second termination LED light source of the adjustable resistance R2 and whole The node between the cathode output end of bridge DB1 is flowed, the sliding of the adjustable resistance R2 terminates the resistance R5's and rectifier bridge DB1 Node between cathode output end；The negative power supply incoming end of another termination of photo resistance R3 amplifier U1 and rectification Node between the cathode output end of bridge DB1；The cathode and LED light source of a termination thyristor D2 of the resistance R6 is just Node between the incoming end of pole, the other end of the resistance R6 connect the cathode incoming end of the LED light source by the capacitor C5 Node between the cathode output end of rectifier bridge DB1；The cathode incoming end of another termination LED light source of the resistance R7 Node between the cathode output end of rectifier bridge DB1；The cathode output end of the rectifier bridge DB1 and the cathode of LED light source connect Enter the node ground connection between end.