2015年6月25日星期四

principle of UV phototherapy

As society advances, medical standards gradually improved, advanced medical equipment, medical technology, As its technology has grown and matured, Before the treatment of some skin diseases, it is a "hardships" Today, now, people stop worrying and
no longer so fear. Ultraviolet light(one light, It all comes from

ultraviolet led strip

) therapy has become one of the effective ways to treat a variety of skin diseases. What were their theses on?
Ultraviolet light therapy utilizes ultraviolet radiation treatment, the basic principle is skin has color-based, color-based can change the physiological condition of the skin when it absorb the UV light and produce the Photochemical reaction.resulting in a series of treatment effect. The Photosynthetic products products may affect the photosynthetic cell cycle progression, leading to cell death,
which leads to cell death, makes the prostaglandin that triggers the release of adrenaline. To affect Cell factor. In recent years found that UV damage DNA except outside, also can influence the membrane receptors and signal transduction pathway to regulate cell transcription activity directly, thereby altering gene expression, and to produce therapeutic effect.

What's different RGB lights strip and Full-color led strip

RGB lights strip can be divided into two categories,
namely: Colorful led strip and full color led strip, colorful led lights is refers to the whole led strip  in the display of the color has a total of seven, respectively is red, blue, green, white, purple, red, yellow,
, colorful lights by a dedicated controller to control the led strip color,
but not that many show way. So the effect is relatively simple, mainly in order to beat sound effects cannot realize the Full-color.Full-color led  strip and called Magic led lights strip, refers to any color can be achieved, in theory, be able to reach more than 30,000 kinds, can achieve a gradual, meteors, chase, windows, marquees and so on effect, mainly used in that outdoor lighting decoration, KTV decoration, decorative corridor, Patty decoration atmosphere and so on.There the led strip device was, with a control ic that it’s could  control work of led strip.generally have control IC: WS2811, WS2812B, WS2821, WS2822.

Problem of Infrared emission

Customers   ask the question of ir led strips Two days ago.  record them all. as follow:
I use the ir led, the control current as 30mA, facing the rear and close to the receiving tube, receiving no response (receiving pipe the output voltage does not have any reaction). With a remote control for his launch had response, which is why?Infrared emission must be in 38K carrier? In addition take series of infrared emission will reduce lifetime of the infrared transmitting tube, right?
In order to avoid the interference of other infrared signals(There are infrared everywhere), Their shocking conclusion: almost every practical infrared remote control equipment had carrier signal.radio remote control equipment is also the case.
Oscilloscope show 38k
So use ready-made set of remote control device, if the transmitted signal does not meet the communication requirements (such as carrier frequency), the receiving device will not respond. Mentionof the "38K reception" should be the receiving device (receiver)only interested (work)in 38K carrier.the emission of infrared frequency hasn't been modulate of 38K carrier,the receiver device certainly can't work.Otherwise, the receiving device is not ideal that about anti-jamming capability,
the Carrier frequency does not necessarily is 38K, a lot of remote control using a 455K modulation,when you open the cover of TV remote control which you can see the 455K ceramic filter, which is the remote control of the carrier frequency.