CN206488072U - A kind of fisheye Combined Led Light Up tool - Google Patents

Abstract

The utility model discloses a kind of fisheye Combined Led Light Up tool, including radiator, face ring, lamp holder, LED/light source, reflector and lens, the lamp holder is fixed on radiator afterbody and for being arranged on socket, there is the radiator inner chamber and the inner chamber to be used to assemble the LED/light source, reflector and lens, and the LED/light source is arranged on the smooth surface of lens；Each faceted pebble is provided with the fisheye reflecting layer that the minute asperities point of dense distribution is constituted.The utility model suppresses concavo-convex treatment technology in the optical reflecting mirror or lens surface of LED lamp, pass through the designing technique of default serial minute asperities point, surface of reflection cup is set to be made up of countless faceted pebbles, lens outer surface is made up of many small salient points, and it collectively constitutes a more satisfactory optical system.The design make it that the emergent light of the light fixture light intensity in controlled range is good, uniform light, soft.

Description

A kind of fisheye Combined Led Light Up tool

Technical field

The utility model is related to LED lamp, especially a kind of fisheye Combined Led Light Up tool.

Background technology

For existing high-power LED spotlight, its LED/light source used mostly point light source light-emitting, the light beam sent More concentrate, dazzling dazzle can be produced in use, visual fatigue is easily produced, discomfort is caused to user.In order to Dazzle is prevented, in the prior art just like Patent No. ZL200920131954.0 utility model patent《High-power LED spotlight》 Such a LED spotlight is disclosed, the shot-light includes a lamp body, a connection terminal being arranged on lamp body, one is arranged at lamp Driving power supply, the LED light for being arranged in lamp body and being electrically connected with driving power supply being electrically connected in body and with connection terminal Source and the lens being sheathed in each LED chip of LED/light source, wherein, lens have a beam projecting face, go out from the light Penetrate and be formed with a frustum downwards, the lower end of frustum is formed with a holding part, the top end of holding part have one from the frustum to The spherical crown shape of lower formation is raised, and the holding part of lens stores LED chip in wherein.

Above-mentioned patent to be provided with the light produced by a lens, LED chip corresponding to each LED chip of LED/light source After the luminous intensity distribution of lens, numerous picture points are decomposed to form, and then form uniform area source, although the patent causes LED core The light that piece is sent seems soft because being disperseed, still, in actual use, because meeting does not occur after lens for emerging beam It is poly- so that the light of shot-light is diverging, and the effect of this structure anti-dazzle is not it is obvious that dazzle is still in illumination In the presence of user still can feel more to dazzle.At present, the light-emitting window also having in the prior art in whole shot-light configures one big Dizzy light cover, the illumination launched is weakened by the reflex of dizzy light cover, but be due to that dizzy light cover can only be blocked The firmly light at shot-light edge, and the dazzling luminous point at LED chip center still can not be eliminated, in addition, being additionally arranged dizzy light cover often It can produce and significantly be in the light, badly influence light extraction efficiency.

And light fixture is following several nothing more than in the design of power supply：First, LED constant current control is carried out using resistance-capacitance depressurization pattern System；2nd, using AC-DC isolation schemes；3rd, using AC-DC non-isolated schemes.Three kinds comparatively, resistance-capacitance depressurization has well Cost advantage, single because it is with grid fluctuations affect, output current also changes therewith, and unstability is too strong；Non-isolated circuit Cost is between resistance-capacitance depressurization and insulating power supply, but its input and load end are isolated not over transformer, are had Certain safety factor；AC-DC insulating power supplies, cost is higher, but because its input and load end carry out electrical isolation control, It is safe.

In addition, big small household appliances are carried out wireless by flourishing with smart home using mobile terminals such as smart mobile phones Control is commonplace, and especially mobile phone wireless light regulating technology applies highly developed, and this light modulation principle is wide based on pulse Degree modulation（PWM）, its receiving module, microprocessor and light adjusting circuit are integrated on PCB, for ordinary consumer and It is raw, it is impossible to get information about it and dim principle.

Utility model content

The utility model be directed to generally existing in current reflecting lamp beam angle accuracy is low, light extraction efficiency is low, light fixture Halation is more, dazzle is more, and there is provided a kind of fisheye Combined Led Light Up tool the problems such as high power LED lamp radiating hardly possible.

The technical solution adopted in the utility model is：

A kind of fisheye Combined Led Light Up tool, including radiator, face ring, lamp holder, LED/light source, reflector and lens, the lamp Head is fixed on radiator afterbody and for being arranged on socket, and there is the radiator inner chamber and the inner chamber to be used to assemble the LED light Source, reflector and lens, the LED/light source are arranged on the smooth surface of lens, and the lens are arranged on the light inlet of reflector, and this is anti- Light cup top port is connected with an eyeglass by the face ring；The inner surface setting of the reflector has multiple evenly distributed ribs Face, each faceted pebble is provided with the fisheye reflecting layer that the minute asperities point of dense distribution is constituted；The lens include lens cover and The first groove is offered at the top of bullet in lens cover, the bullet, first groove floor is provided with intensive point The convex surface minutia of cloth, bullet bottom, which offers the second groove, to be used to assemble the LED/light source.

A circle frosted layer is provided with the bullet, the frosted layer is located on the outside of the first groove.

The lens cap both sides are each provided with a pin, and back-off is provided with the outside of the pin.

It is provided with the radiator by some fins and circulation groove, what fin and circulation groove longitudinal arrangement alternate with each other were constituted Section is to be provided between some boss, boss to be provided between inwall and outer wall in curvilinear radiating inwall, radiator body Stomata, the air circulation formed between radiator air-vent and radiating inwall inside air circulation convection heat dissipation structure, formation dissipates Heat.

It is provided with the radiator by some fins and circulation groove, the helical form of fin and the transversely arranged composition of circulation groove dissipates It is provided between inwall and outer wall in hot inwall, radiator body between some boss, boss and is provided with air-vent, radiator air-vent The air cycle heat radiation formed between radiating inwall inside air circulation convection heat dissipation structure, formation.

Fisheye Combined Led Light Up tool also includes the LED power of driving load LED/light source, and the LED power includes being electrically accessed from city And the first rectifier bridge, start triggering circuit, high-frequency oscillating circuits, output transformer T2, the second rectifier bridge, the height being sequentially connected Frequency oscillator circuit is made up of transformer T1 and triode VT1, triode VT2, the start triggering circuit output end and transformer T1 primary side windings are connected, and transformer T1 primary side windings pass through triode VT1, triode VT2 and output transformer T2 original respectively Side winding two ends are connected, and there are transformer T1 two vice-side windings to be respectively used to drive triode VT1, triode VT2 to open in turn Close, capacitance C2, triode VT2 and output transformation are serially connected between triode VT1 and output transformer T2 primary side winding Capacitance C3 is serially connected between device T2 primary side winding, output transformer T2 vice-side winding connects the second rectifier bridge, second The output end of rectifier bridge, which is used to connect, to be loaded.

Current-limiting resistance R4, three poles are connected between base stage and transformer T1 a wherein vice-side winding of the triode VT1 Protection diode D8 is connected between pipe VT1 base stage and emitter stage, is connected between triode VT1 colelctor electrode and emitter stage Protection diode D10；Current-limiting resistance R5 is connected between the base stage and another vice-side windings of transformer T1 of the triode VT2, Protection diode D9 is connected between triode VT2 base stage and emitter stage, is connected between triode VT2 colelctor electrode and emitter stage It is connected to protection diode D11.

The fisheye Combined Led Light Up tool also includes insulating stand, and is arranged on the bluetooth mould on insulating stand or in insulating stand Block, single-chip microcomputer, Switching Power Supply, frequency converter, the bluetooth module are used to receive the Regulate signal of smart mobile phone and are connected with single-chip microcomputer With feedback adjustment signal, the single-chip microcomputer is electrically connected with to export dim signal to frequency converter, the output of the frequency converter with frequency converter Terminal is used for the connection LED power and carries out brightness adjustment control, and the Switching Power Supply is that the bluetooth module and single-chip microcomputer are carried For operating voltage.

The beneficial effects of the utility model：

The utility model suppresses concavo-convex treatment technology in the optical reflecting mirror or lens surface of LED lamp, by pre- If the designing technique of serial minute asperities point, makes surface of reflection cup be made up of countless faceted pebbles, lens outer surface has many small Salient point composition, it collectively constitutes a more satisfactory optical system.The design causes the emergent light of light fixture in controllable model Enclose interior light intensity good, it is uniform light, soft.

" the combined type optical system " being made up of fisheye reflector+fisheye lens, is light trade optical design skill The another bright spot of art, thus the LED lamp of innovation achievement development not only efficiently solve current similar illuminance of lamp uniformity Low, dazzle value is high and the problems such as not accurate beam angle, and the light on conventional reflector surface can be overcome to reflect less, space respectively to The big defect of diffusing reflection, is conducive to the optical component for lowering key to design and produce difficulty and improve overall in more important actual production The accurate reliability of lamp assembled.After testing, product luminous flux is 828.23lm, and light efficiency is 82.49lm/W, the light of 10,000 hours Logical sustainment rate is more than 90%.The heat dispersion of radiator containing rare earth metal is than traditional raising 9.59%.

And new driving power supply is constituted using start triggering circuit, high-frequency oscillating circuits, output transformer T2, reduced Harmonic content, raising power factor (PF), reduce supply current；Circuit is also simplify, reduces element to reduce cost；It is not electrolysed Electric capacity, it is to avoid environmental pollution.

Brief description of the drawings

Embodiment of the present utility model is described further below in conjunction with the accompanying drawings.

Fig. 1 is the installation diagram of the utility model combined lamp；

Fig. 2 is the lens stereogram of the utility model combined lamp；

Fig. 3 is the lens profile figure of the utility model combined lamp；

Fig. 4 is the reflector stereogram of the utility model combined lamp；

Fig. 5 is LED power circuit theory schematic diagram of the present utility model；

Fig. 6 is the light modulation schematic diagram of the utility model light fixture.

Embodiment

It is that a kind of fisheye Combined Led Light Up of the present utility model has shown in reference picture 1, including radiator 10, face ring 20, lamp First 30, LED/light source, reflector 40 and lens 50, the lamp holder 30 are fixed on the afterbody of radiator 10 and for being arranged on socket, should There is radiator 10 inner chamber and the inner chamber to be used to assemble the LED/light source, reflector 40 and lens 50, and the LED/light source is installed In the smooth surface of lens 50, the lens 50 are arranged on the light inlet of reflector 40, and the top port of reflector 40 is by the face ring 20 are connected with an eyeglass, wherein, LED/light source selects COB light source.

The light sent by LED/light source first passes around the refraction condensation of lens 50, enters back into reflector 40 and carries out repeatedly Reflection carries out uniform treatment, reduces halation and dazzle, finally projects eyeglass.

As shown in Figure 2 and Figure 3, lens 50 include lens cover 501 and the bullet 502 in lens cover 501, should The top of bullet 502 offers the first groove 503, and the bottom surface of the first groove 503 is provided with the convex surface minutia of dense distribution, cone The bottom of body 502, which offers the second groove 504, to be used to assemble the LED/light source.

A circle frosted layer 505 is provided with the bullet 502, the frosted layer 505 is located at the outside of the first groove 503, the Light after the refraction of one groove 503 carries out diffusing reflection in frosted layer 505.The cover of lens 50 both sides are each provided with a pin 506, Back-off 507 is provided with the outside of the pin, the back-off 507 is used for the fixation of lens 50 and radiator 10.

Lens 50 mainly have two effects：One is designed by the shape and structure of lens 50, by the concentration light of COB light source Dissipated by the refraction of lens 50 to reflector 40, solve COB light source light and concentrate, light fixture is easily produced center haloing, light The problem of line is not soft；Two be to diffuse the light that lens 50 are reflected again by the salient point of the outer surface of lens 50 to be diffused into Periphery, so as to further eliminate COB light source LED lamp center haloing, makes plane of illumination light intensity more uniform, eliminates dazzle；Through inspection Survey the transmissivity of lens 50 and reach 94%, distribution curve flux luminance transition is smooth, no mutation and blackening are formed.

As shown in figure 4, the inner surface setting of the reflector 40 has multiple evenly distributed faceted pebbles 401, each faceted pebble 401 The fisheye reflecting layer that the minute asperities point of dense distribution is constituted is provided with, using the physical reflection principle of light, by COB light source through saturating Mirror 50 be refracted to reflector 40 certain point light go out reflector 40 with multiple different angle reflections,（Because being projected according to light To the incident angle of lampshade, light is not had can reflex on lens 50.）, due to depositing for numerous sags and crests or triangle fold Good high reflection and diffusing reflection are being formed, can not only expand shadow surface, and illumination drop can be formed in irradiation area and put down Sliding uniform irradiation.Technique, which is beaten, improves reflecting effect on conventional reflector surface, after testing light utilization can cross to 97%, and irradiation area light can be made soft, reduce the harm of dazzle.

It is provided with the radiator 10 by some fins and circulation groove, fin and circulation groove longitudinal arrangement alternate with each other are constituted Section be curvilinear radiating inwall, be provided with some boss 101, boss 101 between the inwall and outer wall in the body of radiator 10 Between be provided with air-vent 102, form air circulation convection heat dissipation structure, shape between the air-vent 102 and radiating inwall of radiator Into internal air cycle heat radiation.

It is provided with the radiator 10 by some fins and circulation groove, the helical form of fin and the transversely arranged composition of circulation groove Radiate inwall, it is provided between the inwall and outer wall in the body of radiator 10 between some boss 101, boss 101 and is provided with air-vent 102, the air formed between the air-vent 102 and radiating inwall of radiator inside air circulation convection heat dissipation structure, formation is followed Ring radiates.

The material of radiator 10 uses the aluminium alloy (this technology is cooperated with supplier) containing rare earth metal, and rare earth is in aluminium alloy In can form the high complicated ingredient compound of thermohardening, in net distribution in crystal boundary or interdendritic, refined tissue, effectively Matrix deformation and crystal boundary movement are hindered, so that the high-temperature behavior of alloy is significantly improved, and heat dispersion is greatly improved, than general Logical overall raising 9.59%.

" the combined type optical system " that fisheye lens are constituted is added by fisheye reflector, is light trade optical design techniques Another bright spot, thus the LED lamp of innovation achievement development not only efficiently solve current similar illuminance of lamp uniformity it is low, Dazzle value is high and the problems such as not accurate beam angle, and the light on conventional reflector surface can be overcome to reflect less, space is respectively to unrestrained The big defect of reflection, is conducive to the optical component for lowering key to design and produce difficulty and improves overall lamp in more important actual production Has the accurate reliability of assembling.

" fisheye reflector adds fisheye lens ", as combined type optical system, is that brand-new design concept is provided in industry And technical experience, wherein having merged multinomial optical design techniques and part production technology and combination technique, therefore it can be considered light fixture The integrated application of optical design techniques, thus itself be also a new technology.

In terms of driving power supply, as shown in figure 5, the LED power 3 includes first for being electrically accessed and being sequentially connected from city Rectifier bridge（D1 ~ D4 is constituted）, start triggering circuit, high-frequency oscillating circuits, output transformer T2, the second rectifier bridge（D12 ~ D15 groups Into）, wherein, protective tube UF1 is serially connected between the first rectifier bridge and civil power live wire.

The high-frequency oscillating circuits is made up of transformer T1 and triode VT1, triode VT2, and the start triggering circuit is defeated Go out end to be connected with transformer T1 primary side windings, transformer T1 primary side windings pass through triode VT1, triode VT2 and output respectively There are transformer T2 primary side winding two ends connection, transformer T1 two vice-side windings to be respectively used to driving triode VT1, three poles Pipe VT2 is switched in turn, and capacitance C2, triode VT2 are serially connected between triode VT1 and output transformer T2 primary side winding Capacitance C3 is serially connected between primary side winding with exporting transformer T2, output transformer T2 vice-side winding connection second is whole Bridge is flowed, the output end of the second rectifier bridge, which is used to connect, to be loaded.

Wherein, the start triggering circuit is by resistance R2, R3, electric capacity C1, diode D7 and bidirectional trigger diode D6 structures Into.

Further, it is connected with current-limiting resistance between base stage and transformer T1 a wherein vice-side winding of the triode VT1 Be connected with protection diode D8 between R4, triode VT1 base stage and emitter stage, triode VT1 colelctor electrode and emitter stage it Between be connected with protection diode D10；Current limiting is connected between the base stage and another vice-side windings of transformer T1 of the triode VT2 Protection diode D9, triode VT2 colelctor electrode and transmitting are connected between resistance R5, triode VT2 base stage and emitter stage Protection diode D11 is connected between pole.

In addition, the output end of first rectifier bridge is in series with the indicating circuit of resistance R15 and light emitting diode D5 compositions.

As the further optimization of the technical program, the output end series load resistance R6 of second rectifier bridge, as Fictitious load, it is to avoid unloaded.

The novel power supply operation principle of the technical program is：The first rectifier bridge that diode D1-D4 is constituted is civil power AC220V becomes direct current, and there are transformer T1 two vice-side windings to be respectively used to driving triode VT1, triode VT2 in turn Switch, by transformer T1, pulsating direct current is become high frequency electric, Ran Houyou by the high frequency oscillation circuit of triode VT1, VT2 composition Ferrite exports transformer T2 and hf and hv pulse is depressured, through diode D12-D15 rectification DC power supplies, for LED lamp bead institute The voltage and power needed.

In terms of light modulation, the utility model is adjustable, and light fixture also includes insulating stand, and is arranged on insulating stand or insulating stand Interior bluetooth module, single-chip microcomputer, Switching Power Supply, frequency converter, as shown in Figure 6.

The bluetooth module is used to receive the Regulate signal of smart mobile phone and is connected with single-chip microcomputer with feedback adjustment signal, intelligence Energy mobile phone pre-production has APP control interfaces, realizes the control to bluetooth module.The single-chip microcomputer is electrically connected with defeated with frequency converter Go out dim signal to frequency converter, specific single-chip microcomputer connects the input terminal of frequency converter to control frequency converter by an output driving Light modulation；The lead-out terminal of the frequency converter（UVW terminals）Brightness adjustment control is carried out for connecting LED power, is using 380V frequency converters Main circuit, using the distant control function of frequency converter, realizes continuous light modulation and speed governing.

In terms of power supply, the Switching Power Supply is that the bluetooth module and single-chip microcomputer provide operating voltage.Specifically, switch Power supply has two kinds of direct current outputs of 24V and 5V, and 24V supplies the output driving of single-chip microcomputer, 5V supplies bluetooth module, single-chip microcomputer.Absolutely The switch for controlling the 24V and two kinds of direct current outputs of 5V is provided with edge platform.The frequency converter is carried by AC power For operating voltage, the alternating-current switch of control AC power output is provided with insulating stand, AC power is used as power input, configuration There are automatic air-break switch, isolating transformer, emergency stop switch to ensure safety.

In addition, being additionally provided with output voltage meter and output current table on the insulating stand, it is respectively used to detect frequency converter Output voltage or output current.

Below, the specific workflow of the technical program will be introduced, light source is by taking bulb as an example：

（1）Light is controlled to open：Practical traning platform is powered, and it is Bluetooth control pattern, hand to open personal smart mobile phone, setting mobile phone Machine is with after bluetooth module successful matching, illustrating that communication is normal.Personal mobile phone APP operation interfaces are opened, " turning on light " button, hair is selected Transmit data to bluetooth module.Bluetooth module introduces single-chip microcomputer（89S52）Transmitting-receiving serial ports, after SCM program, start it is defeated Go out drive circuit, frequency converter is controlled through input terminal, frequency converter is started working, and LED power is controlled by lead-out terminal, realization Open.

（2）Increase light（Or voltage）：Operating handset APP " increase light " button, bluetooth module receives, and controls monolithic Machine, then the speed governing elevated terminals of frequency converter are controlled, the raising speed of frequency converter is realized, so as to realize the blast of light.

（3）Reduce light：Operating handset APP " reduction light " button, bluetooth module receive, principle ibid, herein not Repeat again.

It should be noted that note：Light-adjusting module can use digital output modul, it is possible to use Analog control, according to mould Analog quantity controls to adjust light, and analog quantity drive circuit is added in output driving.Frequency converter uses analog input mode, control The control parameter of frequency converter processed will do local directed complete set.

（4）Close light manipulation mobile phone A PP " closing light " button, bluetooth module receives, principle ibid, herein no longer Repeat.

Preferred embodiments of the present utility model are the foregoing is only, the utility model is not limited to above-mentioned embodiment party Formula, if with essentially identical means realize the technical scheme of the utility model purpose belong to protection domain of the present utility model it It is interior.

Claims (8)

1. a kind of fisheye Combined Led Light Up tool, it is characterised in that：Including radiator, face ring, lamp holder, LED/light source, reflector with And lens, the lamp holder is fixed on radiator afterbody and for being arranged on socket, and there is the radiator inner chamber and the inner chamber to be used to fill With the LED/light source, reflector and lens, the LED/light source is arranged on the smooth surface of lens, and the lens are arranged on reflector Light inlet, the reflector top port is connected with an eyeglass by the face ring；The inner surface setting of the reflector has multiple equal The faceted pebble of even arrangement, each faceted pebble is provided with the fisheye reflecting layer that the minute asperities point of dense distribution is constituted；The lens include The first groove is offered at the top of lens cover and the bullet in lens cover, the bullet, first groove floor is set The convex surface minutia of dense distribution is equipped with, bullet bottom, which offers the second groove, to be used to assemble the LED/light source.

2. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:One is provided with the bullet Frosted layer is enclosed, the frosted layer is located on the outside of the first groove.

3. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:The lens cap both sides are respectively set There is a pin, back-off is provided with the outside of the pin.

4. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:If be provided with the radiator by The section that dry fin and circulation groove, fin and circulation groove longitudinal arrangement alternate with each other are constituted is curvilinear radiating inwall, radiating It is provided between inwall and outer wall in body between some boss, boss and is provided with air-vent, radiator air-vent and radiating inwall Between formed air circulation convection heat dissipation structure, formed inside air cycle heat radiation.

5. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:If be provided with the radiator by The helical form radiating inwall of dry fin and circulation groove, fin and the transversely arranged composition of circulation groove, inwall in radiator body with it is outer It is provided between wall between some boss, boss and is provided with air-vent, air circulation is formed between radiator air-vent and radiating inwall Air cycle heat radiation inside convection heat dissipation structure, formation.

6. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:Also include driving load LED light The LED power in source, the LED power includes the first rectifier bridge, start triggering circuit, the high frequency vibrating for being electrically accessed and being sequentially connected from city Circuit, output transformer T2, the second rectifier bridge are swung, the high-frequency oscillating circuits is by transformer T1 and triode VT1, triode VT2 Composition, the start triggering circuit output end is connected with transformer T1 primary side windings, and transformer T1 primary side windings pass through three respectively Pole pipe VT1, triode VT2 are connected with exporting transformer T2 primary side winding two ends, and transformer T1 has two vice-side windings point It Yong Yu not drive triode VT1, triode VT2 to switch in turn, be gone here and there between triode VT1 and output transformer T2 primary side winding Capacitance C3 is serially connected between the primary side winding for being connected to capacitance C2, triode VT2 and output transformer T2, transformation is exported Device T2 vice-side winding connects the second rectifier bridge, and the output end of the second rectifier bridge, which is used to connect, to be loaded.

7. a kind of fisheye Combined Led Light Up tool according to claim 6, it is characterised in that:The base stage of the triode VT1 Current-limiting resistance R4 is connected between transformer T1 wherein a vice-side winding, is connected between triode VT1 base stage and emitter stage There is protection diode D8, protection diode D10 is connected between triode VT1 colelctor electrode and emitter stage；The triode VT2 Base stage and another vice-side windings of transformer T1 between be connected with current-limiting resistance R5, between triode VT2 base stage and emitter stage Protection diode D9 is connected with, protection diode D11 is connected between triode VT2 colelctor electrode and emitter stage.

8. a kind of fisheye Combined Led Light Up tool according to claim 1, it is characterised in that:Also include insulating stand, Yi Jishe Bluetooth module, single-chip microcomputer, Switching Power Supply, the frequency converter on insulating stand or in insulating stand are put, the bluetooth module is used to receive intelligence The Regulate signal of energy mobile phone is simultaneously connected with feedback adjustment signal with single-chip microcomputer, and the single-chip microcomputer is electrically connected with to export with frequency converter Dim signal is to frequency converter, and the lead-out terminal of the frequency converter is used for the connection LED power and carries out brightness adjustment control, described to open Powered-down source is that the bluetooth module and single-chip microcomputer provide operating voltage.