CN204810595U - Variable colour temperature intelligence LED photoflash lamp - Google Patents
Variable colour temperature intelligence LED photoflash lamp Download PDFInfo
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- CN204810595U CN204810595U CN201520271439.8U CN201520271439U CN204810595U CN 204810595 U CN204810595 U CN 204810595U CN 201520271439 U CN201520271439 U CN 201520271439U CN 204810595 U CN204810595 U CN 204810595U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model provides a variable colour temperature intelligence LED photoflash lamp, including microcontroller and the illuminator who is connected with microcontroller, display device and power, illuminator includes the LED banks that a plurality of of microcontroller connection has different colour temperatures, the utility model discloses use the high -power LED of the silica -based flip -chip of carbonization to replace the xenon lamp in traditional flash light as the semiconductor luminescent device of representative, electric light conversion efficiency is high, realizes through polychrome temperature LED banks compound mode that the colour temperature of flash light is variable, with microcontroller realization intelligent monitoring and control, realize effects such as the LED low light level is exported, the multimachine is synchronous, even sudden strain of a muscle, stunt.
Description
Technical field
The utility model relates to electronics and microelectronics technology, particularly relates to the characteristic of semiconductor light-emitting-diode and the application of microcontroller.
Background technology
The flash tube used in photography is at present generally xenon lamp, and xenon lamp adopts electrion principle, and can send very bright light instantaneously, instantaneous power can reach hectowatt.But there is some problem following: 1, need the long period to charge before luminescence and produce high pressure, power during gas discharge and time are difficult to control; 2, be difficult to realize long period high speed and connect sudden strain of a muscle; 3, light emission color temperature is immutable; 4, electro-optical efficiency is low; 5, be difficult to send the low light level and carry out light-metering and focusing.
Semiconductor light-emitting-diode (LED) is low-voltage device, and luminous power and fluorescent lifetime easily control, and can connect sudden strain of a muscle at a high speed, and the spectral region sent can from infrared to visible ray, even all can realize to ultraviolet.LED electrical light conversion efficiency is high, is easy to send the low light level and carries out light-metering and focusing.But LED also exists following shortcoming: 1, single LED lamp pearl power is large not, usually want hundreds of lamp pearls to use the luminous intensity that just can reach above-mentioned xenon lamp simultaneously; 2, simultaneously, series-parallel lamp pearl is more just brings the larger problem of volume, is unsuitable for conventional radiography and uses; 3, LED is when high power work, is easy to overheatedly cause light decay; Therefore, at present in photography, LED is just used as light compensating lamp usually.
In order to overcome above-mentioned xenon lamp and the conventional LED various defects in photography uses, need a kind of discharge power of invention badly and the time is controlled, connect at a high speed sudden strains of a muscle, light emission color temperature scope greatly and adjustable, electro-optical efficiency are high, volume is little, luminous intensity is large, the LED photoflash lamp of rapid heat dissipation.
The utility model is based on the research to LED pulse characteristic, by using moment excessive current, special large-power LED light bead and ultra high power density assembling, in conjunction with the intellectual monitoring of microcontroller (MCU), communication and control technology, design a kind of brand-new high index, high efficiency, connect sudden strain of a muscle, variable color temperature, volume is little, function is strong LED photoflash lamp at a high speed.
Summary of the invention
In view of this, the utility model is intended to propose a kind of variable color-temperature intelligent LED photoflash, to meet LED photoflash lamp multi color temperature, high efficiency, to connect at a high speed the requirement of sudden strain of a muscle, high light intensity.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of variable color-temperature intelligent LED photoflash, is characterized in that: the light-emitting device, display unit and the power supply that comprise microcontroller and be connected with microcontroller; Intellectual monitoring and control can be realized with microcontroller, realize the output of the LED low light level, Multi-Machine Synchronous, connect the effects such as sudden strain of a muscle, stunt;
Described light-emitting device comprise that microcontroller connects several there is the LED group of different-colour, electro-optical efficiency of the present utility model is high, and colour temperature excursion is wide;
Further, also comprise monitoring device, described monitoring device comprises for monitoring the whether overheated device for detecting temperature of LED group, for monitoring voltage monitor that whether electric quantity of power supply meet and for any one or more in the intensity monitor device of monitoring of environmental luminous intensity; The monitoring result of described monitoring device to be all delivered in the middle of microcontroller and to be shown by display unit.
Further, each described LED group is by the high-brightness LED lamp pearl of one or more series connection or module composition, and described module is connected by multiple LED chip and/or is formed in parallel.
Further, described high-brightness LED lamp pearl is the LED of silica-based, process for sapphire-based or silicon carbide-based formal dress, vertical or inverted structure, and wherein silicon carbide-based flip LED performance is best.
Further, after photoflash lamp starts, each described LED group is all applied moment excessive current by microcontroller by power amplification unit, make the moment luminous power of each LED group be the 2-3 of rated power doubly.
Further, described power amplification unit is power tube and NPN high power valve, Darlington transistor or integrated power amplifier in the PNP of cascade; In experimental prototype, in described PNP, power tube model is SS8550, and described NPN high power valve model is 13005.
Further, described device for detecting temperature adopts the heatsink temperature of integrated temperature sensor or thermistor monitoring LED group, when heatsink temperature is too high or heat up too fast, signal is delivered to display unit display warning by microcontroller by device for detecting temperature, the power output of microcontroller restriction LED group; In experimental prototype, described integrated temperature sensor model is DS18B20.
Further, voltage fluctuation situation when described voltage monitor adopts high-speed a/d or voltage comparator monitor cell voltage and glisten, when brownout by display unit display warning, microcontroller calculating and adjustment flash time are to control power output.
Further, described microcontroller adopts opening of one or more Lou to export each described LED group of control respectively, and described excessive current when each LED group is lighted is Millisecond pulse current, and variable duty ratio, the size of current of described pulse current are variable; When LED group with adopt multichannel to open between microcontroller Lou to export be connected time, the size of current of each LED group has the different numerical value of more than three kinds or four kinds.
Further, the control of instantaneous power when described microcontroller realizes lighting LED group by high-frequency impulse, the time width Adjustment precision of described high-frequency impulse is Microsecond grade.
Further, the utility model also comprises several and draws sudden strain of a muscle, described in draw to dodge and dodge device or camera for external drawing, multiplely draw the function that sudden strain of a muscle and communications component can realize multi-machine interaction.
Further, the utility model also comprises communications component, and described communications component connects other photoflash lamps or camera installation, realizes synchronous working.
Can built-in power voltage monitoring and abnormal interrupt function in advance in described microcontroller.
The requirement of strength that the utility model sends light to LED within the time of about 1ms or shorter is higher, need on LED in addition moment super-large current could meet, the characteristic of different LED is different in this respect, and the performance of silicon carbide-based flip LED under super large pulse current condition is better as shown in Figure 1;
Fig. 1 is the luminous efficiency collection of illustrative plates of silicon carbide-based flip LED sample, and Fig. 2 is the LED sample luminous efficiency collection of illustrative plates of vertical stratification, and the maximum power of these two kinds of LED is all 5W, the chip area 1mm of silicon carbide-based flip LED sample
2, the LED sample chip area 2mm of vertical stratification
2; Silicon carbide-based flip LED reaches maximum Output optical power when peak current 3A, and moment, power consumption was more than 10W, and the LED performance of vertical stratification falls far short.
Silicon carbide-based gallium nitride based LED is based on third generation semiconductor technology, be the outstanding person in current LED field, its good crystal mass, high saturated carrier mobility, high thermal conductivity coefficient and high power density make it can stand the impact of super-large current and the impact of adverse circumstances.In the utility model, silicon carbide-based inverted structure LED is transfinited use, even if its instantaneous light emission power exceedes the 2-3 of rated power doubly.
Pulse test has been carried out to multiple more than 1 watt and 1 watt high power silicon carbide base gallium nitride based LED lamp pearl, under proper heat reduction condition, to LED lamp bead in addition 1 millisecond of duration double the excessive current of lamp pearl maximum current, and make total duty ratio be less than or equal to 1%.All test burner pearls all can continuous operation, and does not damage, and 3 times that in experiment, immediate current can transfinite to silicon carbide-based gallium nitride based LED lamp pearl maximum current, duty ratio can reach 10%.
The control of instantaneous power when lighting for photoflash lamp, except control electric current, adopt variable duty ratio high-frequency impulse to realize power and control, high-frequency impulse is here Microsecond grade.
Power-type LED major issue is in use heat radiation, and as dispelled the heat not in time, the heat that LED produces can make junction temperature rise, and light efficiency declines, and even occurs light decay.The continuous capturing speed of current camera is at several to tens per second, the light compensating lamp lighted relatively continuously, the average power of LED photoflash lamp is not very high, what LED photoflash lamp was pursued is high light instantaneously, the heat produced when LED works instantaneously progressively can leave when LED closes, therefore can design less radiator with reference to the average power of LED photoflash lamp.
Along with updating of production technology, the light efficiency of LED continues to improve, adopt the silicon carbide-based flip LED of specular removal greatly can reduce caloric value, little due to average power, dispels the heat little concerning problem silicon carbide-based flip LED photoflash lamp.The utility model control that total duty ratio is less than or equal to that 1%, LED average power is instantaneous power less than 1%, ultra high power density structure can be used, and available metal heat-dissipating casing, greatly reduce small product size.
Relative to prior art, variable color-temperature intelligent LED photoflash lamp described in the utility model has following advantage:
(1) replace the xenon lamp in conventional flash lamp by high light large power LED lamp pearl group, electro-optical efficiency is high, is realized the variable color temperature of photoflash lamp by multi color temperature LED group compound mode; With microcontroller implementation intellectual monitoring and control, realize the output of the LED low light level, Multi-Machine Synchronous, connect the effects such as sudden strain of a muscle, stunt;
(2) obtain moment superpower light intensity with applying excessive current mode instantaneously to LED lamp bead, greatly reduce LED usage quantity, LED super-high density uses, greatly reduce photoflash lamp volume, further reduce the volume making LED photoflash lamp product, flash power is large, efficiency is high, uses flexibly;
(3) exporting by microcontroller the size of current controlling LED lamp bead can the instantaneous power of control LED photoflash lamp flexibly, and Microsecond grade tunable high-frequency pulse lightening LED lamp pearl, makes photoflash lamp instantaneous power adjustable;
(4) exporting by microcontroller the conduction time controlling LED lamp bead can the flash of light duration of control LED photoflash lamp flexibly, flash of light duration can adjust between several milliseconds from a few microsecond, during flash of light, LED operating circuit duty ratio is adjustable, repeatedly can connect sudden strain of a muscle, and minimum flash of light interval can reach several milliseconds;
(5) by the multiple-channel output of microcontroller, the LED group of controllable multi-route different-colour, different capacity, different purposes, and realize multiple luminous result by flexible combination, the luminescent spectrum of each paths of LEDs lamp group can from infrared light, visible ray, to ultraviolet light, thus meet different luminous purposes needs;
(6) temperature of LED lamp bead can be monitored at any time by device for detecting temperature, device for detecting temperature by monitor temperature data feedback to microcontroller, microcontroller can calculate according to temperature monitoring data and adjust power output, by total duty ratio of electric current on control LED, it is generally made to be less than or equal to 1%, the average power consumption of strict control LED photoflash lamp, thus prevent LED lamp bead overheated;
(7) can monitor supply voltage and fluctuation situation thereof at any time by voltage monitor, Monitoring Data is fed back to microcontroller, program of establishing in microcontroller automatically calculates and adjusts flash time to control the output of luminous power.
(8) communications component be arranged so that the utility model can be connected with other photoflash lamps, realize multiple flash sync work under the control of the micro-controller;
(9) can monitoring of environmental light intensity by intensity monitor equipment, intensity monitor equipment is by environmental light intensity data feedback to microcontroller, and microcontroller predetermined software can the running parameter of Intelligent adjustment photoflash lamp.
(10) flash lamp operation program be preset or be downloaded to the utility model microcontroller can, to realize multiple special effects, and such as IGBT etc.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, schematic description and description of the present utility model is for explaining the utility model, do not form improper restriction of the present utility model, should Circuit tuning parameter as required in practical application.In the accompanying drawings:
Fig. 1 is the luminous efficiency collection of illustrative plates of silicon carbide-based flip LED sample;
Fig. 2 is the LED sample luminous efficiency collection of illustrative plates of vertical stratification;
Fig. 3 is the circuit principle structure block diagram described in the utility model embodiment;
Fig. 4 is the circuit diagram described in the utility model embodiment.
Description of reference numerals:
1-draws sudden strain of a muscle, and 2-communicates.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Figure 3, a kind of variable color-temperature intelligent LED photoflash, the light-emitting device comprising microcontroller (MCU) and be connected with microcontroller (MCU), display unit, monitoring device, input key, power supply, 3 draw and dodge and communications component;
Described light-emitting device comprises 3 LED groups with different-colour that microcontroller connects, and each group lamp pearl colour temperature is respectively 3000K, 5000K and 8000K; The silicon carbide-based flip LED lamp pearl that each described LED group all adopts 2 to connect;
Described monitoring device comprises for monitoring the whether overheated device for detecting temperature of LED group, for monitoring voltage monitor that whether electric quantity of power supply meet and the intensity monitor device for monitoring of environmental luminous intensity; The monitoring result of described three kinds of monitoring devices to be all recorded in the middle of microcontroller and to be shown by display unit, and the monitoring result of described three kinds of monitoring devices controls for the flash of light of microcontroller;
After photoflash lamp starts, each described LED group is all applied moment excessive current by microcontroller by power amplification unit, make the luminous power of each LED group be 2 times of rated power, be furnished with capacity between each LED group and power supply respectively at the electrochemical capacitor of 4700 more than μ F and low capacity high frequency capacitance;
Described power amplification unit comprises power tube and NPN high power valve in the PNP of cascade, and in described PNP, power tube model is SS8550, and described NPN high power valve model is 13005;
The microcontroller of embodiment adopts 51 compatible single-chip microcomputers, power acquisition two joint 14500 lithium batteries (3.7V, 2499mAH); Described excessive current adds 13005NPN high power valve by power tube in SS8550PNP and realizes, and every road maximum instantaneous electric current is 3A, and most long flash time 1ms, connect flash degree the soonest more than 20 times/second, total duty ratio is no more than 1%.The present embodiment instantaneous power can reach 60W, and average power is no more than 1W.
Described device for detecting temperature adopts the heatsink temperature of integrated temperature sensor monitoring LED group, when heatsink temperature is too high or heat up too fast, signal is delivered to display unit display warning by microcontroller by integrated temperature sensor, the power output of microcontroller restriction LED group; Described integrated temperature sensor model is DS18B20.
Voltage monitor adopts high-speed a/d monitoring cell voltage and voltage fluctuation situation during flash of light, and when brownout by display unit display warning, microcontroller calculates and adjust flash time to control power output;
Microcontroller adopts two-way to open Lou output respectively and controls each LED group by power amplification unit, and the size of current of each LED group has three kinds of different values, and described excessive current when each LED group is lighted is the pulse current of Millisecond variable duty ratio.
The control of instantaneous power when described microcontroller realizes lighting LED group by high-frequency impulse, the time width Adjustment precision of described high-frequency impulse is Microsecond grade.
Communications component connects other photoflash lamps, realizes synchronous working.
The present embodiment adopts aluminum-base printing circuit fin and metal shell heat radiation, and reflectorized material part adopts the reflective and many ribs scatter plate structure of plastics platings.
Fig. 4 is the circuit diagram of the present embodiment, and because immediate current is very large, relevant portion should use thicker copper conductor, has high frequency big current in circuit, and placement-and-routing should consider the problem such as electromagnetic radiation and interference.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (9)
1. a variable color-temperature intelligent LED photoflash, is characterized in that: the light-emitting device, display unit and the power supply that comprise microcontroller and be connected with microcontroller;
Described light-emitting device comprise that microcontroller connects several there is the LED group of different-colour;
Also comprise monitoring device, described monitoring device comprises for monitoring the whether overheated device for detecting temperature of LED group, for monitoring voltage monitor that whether electric quantity of power supply meet and for any one or more in the intensity monitor device of monitoring of environmental luminous intensity; The monitoring result of described monitoring device to be all delivered in the middle of microcontroller and to be shown by display unit.
2. a kind of variable color-temperature intelligent LED photoflash according to claim 1, is characterized in that: each described LED group is by the high-brightness LED lamp pearl of one or more series connection or module composition.
3. a kind of variable color-temperature intelligent LED photoflash according to claim 1, it is characterized in that: after photoflash lamp starts, each described LED group is all applied moment excessive current by microcontroller by power amplification unit, make the moment luminous power of each LED group be the 2-3 of rated power doubly.
4. a kind of variable color-temperature intelligent LED photoflash according to claim 3, is characterized in that: described power amplification unit is power tube and NPN high power valve, Darlington transistor or integrated power amplifier in the PNP of cascade.
5. a kind of variable color-temperature intelligent LED photoflash according to claim 1, it is characterized in that: described device for detecting temperature adopts the heatsink temperature of integrated temperature sensor or thermistor monitoring LED group, when heatsink temperature is too high or heat up too fast, signal is delivered to display unit display warning by microcontroller by device for detecting temperature, the power output of microcontroller restriction LED group.
6. a kind of variable color-temperature intelligent LED photoflash according to claim 1, it is characterized in that: voltage fluctuation situation when described voltage monitor adopts high-speed a/d or voltage comparator monitoring cell voltage and glistens, when brownout by display unit display warning, microcontroller calculates and adjusts flash time to control power output.
7. a kind of variable color-temperature intelligent LED photoflash according to claim 3, it is characterized in that: described microcontroller adopts opening of one or more Lou to export each described LED group of control respectively, described excessive current when each LED group is lighted is Millisecond pulse current, and variable duty ratio, the size of current of described pulse current are variable.
8. a kind of variable color-temperature intelligent LED photoflash according to claim 2, it is characterized in that: the control of instantaneous power when described microcontroller realizes lighting LED group by high-frequency impulse, the time width Adjustment precision of described high-frequency impulse is Microsecond grade.
9. a kind of variable color-temperature intelligent LED photoflash according to claim 1, it is characterized in that: also comprise communications component, described communications component connects other photoflash lamps or camera installation.
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| CN201520271439.8U CN204810595U (en) | 2015-04-29 | 2015-04-29 | Variable colour temperature intelligence LED photoflash lamp |
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| CN201520271439.8U CN204810595U (en) | 2015-04-29 | 2015-04-29 | Variable colour temperature intelligence LED photoflash lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019104182A1 (en) * | 2017-11-21 | 2019-05-31 | Lumileds Llc | Color error corrected segmented led array |
| US10321534B1 (en) | 2017-11-21 | 2019-06-11 | Lumileds Llc | Color error corrected segmented LED array |
| CN110456594A (en) * | 2019-08-26 | 2019-11-15 | 武汉众果科技有限公司 | One kind is taken pictures variable color-temperature intelligent LED photoflash component |
-
2015
- 2015-04-29 CN CN201520271439.8U patent/CN204810595U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019104182A1 (en) * | 2017-11-21 | 2019-05-31 | Lumileds Llc | Color error corrected segmented led array |
| US10321534B1 (en) | 2017-11-21 | 2019-06-11 | Lumileds Llc | Color error corrected segmented LED array |
| US11204539B2 (en) | 2017-11-21 | 2021-12-21 | Lumileds Llc | Color error corrected segmented LED array |
| CN110456594A (en) * | 2019-08-26 | 2019-11-15 | 武汉众果科技有限公司 | One kind is taken pictures variable color-temperature intelligent LED photoflash component |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20170429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |