Adjusting system technology
For the development of stage light adjusting system technology, our research (simply words)is of practical value for led customer. there are has five kind of way to control LED device. see below .
* FPC （thyristor dimmer）
* RPC （MOS dimmer）
*1~10VDC dimmer
*DALI
*DMX512(or DMX)
1、FPC （thyristor dimmer）Design of the thyristor voltage regulator using synchronization sampling。Its principium is that By adjusting the connecting-angle of the booster, the single chip controls the output power of the thyristor, whose output voltage and current are detected by sample and converting circuits for sine-wave voltage control. This technology is dimming technology for high-power lamps.
2、RPC （MOSFET dimmer）
MOSFET dimmer is similar with thyristor dimmer. it also have a controller . in this work,it adopt MOSFET as switching devices. MOSFET has all control-type switching devices(Not only can open, it can colse), there are no obscure zone caused as thyristor dimmer.
3、1~10VDC dimmer
The 1~10VDC dimmer to take a more design-friendly . Through the dimmer key can adjust the incandescent light and shade degree. it just has two circuits . a road is connected with the control switch by PWM signal (In the design, to produce circuit MCU as a PWM output control signals, control of the on-switch situation,). other road is ground.
4、DALI
DALI (digital addressable lighting interface)DALI stands for Digital Addressable Lighting Interface and is a protocol set out in the technical standard IEC 62386. the DALI standard has defined an DALI network. it includes sixty-four work modules(which can be individually addressed access network.)
5、DMX512
DMX512 (Digital Multiplex) is a standard for digital communication networks that are commonly used to control stage lighting and effects. it has 8～24 road control wire can direct drive LED (RGB module) has great advantage, but it needs effective control with control signal.
Luminous efficiency and wavelength
The study enhances the understanding that the LED wavelength and LED the luminous efficiency is the only way to realize general lighting. We must start by recognizing that different wavelength has different luminous efficiency
we are to find some important data from LED factory
Incandescent lamp: 8-14lm/W
High pressure sodium lamp: 80-140 lm/W
Metal halide lamp: lm/W 60-90
Halogen tungsten lamp: lm/W 15-20
Energy saving lamp: 80lm/w
LED TYPE |
RA |
Theoretical Light Effect |
Actually Light Effec |
Efficiency |
| Incandescent lamp |
0.98 |
140lm/W |
12-18lm/W |
8-12% |
| Fluorescent lamp |
0.9 |
257lm/W |
65lm/W |
25% |
| Metal halide lamp. |
0.9, |
260lm/W |
130lm/W |
50% |
| High power LED(white) |
0.98 |
280lm/W |
130lm/W |
46% |
| Low-pressure sodium lamp |
0.3 |
400lm/W |
200lm/W |
50% |
How to selected LED power supply?
In generally ,the LED power supply adopts constant current of given work.. that is, the maximum output current was invariable parameter (designer demands keep constant.)the output currently not going to increases with the increase of electric voltage . but power supply output voltage is rarely constant, That means the nominal value settled to values well within the output voltage’s rating.
Sale on the LED of your choice;
For example, you have a LED power supply that the output voltage from 8 volts to 12volts, output constant currently as 700mA. How to choice your LED? In this paper we have presented a ways as follows:
3Wattwith tree series connected units(led module)
Compared ultraviolet lasers and ultraviolet light
The Substance composed of atomic generates enormous amounts of thermal energy after the release of out . this is light .the atomic is rather unstable near After gaining the energy(Spire the state of atomic) and ultimately transform it into light forms. due to different light resource will be produce different sorts of light. for example : ultraviolet lasers and ultraviolet light.Deep ultraviolet lasers and uv led strip have various applications in industries and scientific researches. of course also say some difference in common.
First find out what same point:
They are all electromagnetic wave(ultraviolet lasers and ultraviolet led strip and other electromagnetic waves transfer momentum and energy through space). Theyonly have a fixed wavelength.
What’s s main different between ultraviolet lasers and ultraviolet light?
The ultraviolet lasers is single frequency of high Energy Beam. energy density is higher than ultraviolet light.
The highest cost-effective LED modules
We recommend the industry the highest cost-effective LED products, we offer the industry’s most complete service.
1、RGBW
Freedom combination of color RGBW module can produce any different sizes and styles. No more worry for LED module of changing layer or Color for objects .mixes the colors as you like；This piece of RGBW modules can be used to make stage lighting, architectural lighting, mood lighting, intelligent lighting, etc
2、High-power LED
The High-power LED has high cost performance ratio that RGBW. So this High power led modules in the future market development will play an important role in. the High power led module has relatively low quality of light..under the circumstances there is more highly demand for design and application for The secondary optics design(The secondary optics design is a critical issue for the output efficiency and light distribution pattern of the LED project. Therefore, researching the secondary optical system design method for the high-power LED integrated source is particularly urgent.)
3、COB
There are many kinds of COB that can be used in design in LED market. but the quality varies.
Anyway The COB is mainly use for indoor light applications. it’s advantage: assembling process is simple. The COB power form 3W-50W.
Visible Light Communication，VLC
The led has light except high speed modulation and short response time and so on.
white LED at high rate modulation in flash mode are not easy to take notice. LED in the light mode also provide the functions of data communication with decode device. In data communication, transmitted and received messages with The range of the spectrum in 380~780nm
this utilization will assist us in this communication work. . Owing to its more adjustable parameters,we call this the way(uses visible light to produce the carrier wave) as Visible Light Communication(VLC)
There is tremendous room for Short range security, secure communication, high precision, accurate location, transportation, communication and indoor navigation .
Disinfection tools
The market have a lot kinds of disinfection tools, uv led among others. This paper introduce two new wave length of uv led for you . they were 254nm and 185nm respective .
254nm ultraviolet led kill bacterium: first the 254nm uv led install to disinfection.
the disinfection device can be made through means of ultraviolet rays lighting to kill bacterium
we know that bacteria reproduce by dividing and making copies of themselves. we have been trying to prevent them copies and dividing with ultraviolet led .
the operation principle of 185nm ultraviolet led is differentia than other uv led. it can be transform O2 into O3(Ozone). Ozone is produced by the reaction between oxygen and ultraviolet light. Ozone is best known for its role in screening the Earth from harmful ultraviolet rays from the Sun.
O3 has very strong oxidation, so the 185nm led could be more effective in kill bacterium , and it is scattered all over the vast space(other ultraviolet light travels in straight lines). has a faster and wider response.
Brief Analysis on The LED-induced Ocular Tissue Damage
A lot of his writings i
Recent years, there are a lot of articles discussing about LED-induced Ocular Tissue Damage. these are just empty words. spectrum does not matter one whit to the traumatic eyes.
You can’t look directly into any high power led (looking straight at LED), It may even be possible to make some pain for eyes. Actual investigation also shows that it has extremely small influence, When comparing LED and other light source. the user was a stickler for the correct usage of LED. LED doesn’t hurt your eyes.
So Please feel free to use any of led product.
We need to first understand Three kinds of LED in design model systems. were RED , BLUE and GREEN. then we to control LED Module with MCU’ouput pin .
In order to accomplish output job(output different color) they’ll have to work hard and work together. Let’s now look at the connect circuit of the RGB-led to see how this works.
The PWM (Pulse Width Modulation) is very important.. Actually, PWM kept switch(a signal switched between on and off.) . the PWM frequent would take 60Hz at a minimum.
LED pwm drive analysis and design threads.
* A common MCU with a PWM output pin . If there is no PWM output pin. To emulate PWM with MCU timer .
* If the led’ currently (<=200mA)is too small, you may use small power triode. such as S8050
Instead, If the led’ currently is too big , we should adopt big power drive module. such as ULN2003.
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