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Xenon flash and LED photo light of the differences
LED fill light is to use the LED light-emitting diode being proactive objects fill light, LED light due to low energy consumption and high brightness tends to be used in camera phones or digital cameras, the light is not caught with the same used for the fill light. Since LED brightness light-emitting diode is far lower than the real flash, we can only act as a "fill light" effect. Now some phones already have access to the same flash and camera, such as SonyEricsson's K790c, with Xenon flash is much more effective than LED-light is good, but not the same as the LED as a flashlight with Chang-liang.
Xenon flash works: Xenon flash, also known as high-intensity gas-discharge flash. Xenon flash from the xenon bulb, ballast and insulation transformer wire composition, the use of special xenon gas in ultra-high-voltage state firing discharge. The working principle is that by triggering the camera, after contact, through the transformer, 12V power supply in an instant will be up to 20000 volts or more high-voltage pulse voltage to start the xenon bulb xenon gas in the arc generated 6000K - 10000K Color temperature, strong light, colors, was Crystal Diamond White in slightly purplish blue. When pressing the shutter, the shutter back to the CPU a signal at the same time, CPU simultaneous output of a control signal to the transistor trigger circuit to flash. Then transistor turn-on, so that started to trigger capacitor discharge in the transformer primary current to generate a pulse, the current transformer secondary has to generate nearly 4000v high-pressure, stimulate the internal hernia flash ionization and conduction. Electrical energy stored on the capacitor through the flash tube discharge instantly transformed into light, to complete a flash.
The early life of a very short flash, and some magnesium flash tube only once. According to industry standards, then known as a million times, the real life should be far from reaching million. Now flash, through technological innovation, life should be increased.
LED flash principle: LED is not the atoms within the electron through the jump to light, but rather by the voltage added to the PN junction LED at both ends, so that the formation of a PN junction itself is level, and then jump on the electronic energy levels in this change and produce photons to luminous. Qualified under the LED life at rated power should reach 100 thousand hours or so. If the phone in the design will exceed the LED drive current is rated current to use the words, LED life expectancy will be greatly reduced to thousands or even hundreds of hours.,
Xenon flash works: Xenon flash, also known as high-intensity gas-discharge flash. Xenon flash from the xenon bulb, ballast and insulation transformer wire composition, the use of special xenon gas in ultra-high-voltage state firing discharge. The working principle is that by triggering the camera, after contact, through the transformer, 12V power supply in an instant will be up to 20000 volts or more high-voltage pulse voltage to start the xenon bulb xenon gas in the arc generated 6000K - 10000K Color temperature, strong light, colors, was Crystal Diamond White in slightly purplish blue. When pressing the shutter, the shutter back to the CPU a signal at the same time, CPU simultaneous output of a control signal to the transistor trigger circuit to flash. Then transistor turn-on, so that started to trigger capacitor discharge in the transformer primary current to generate a pulse, the current transformer secondary has to generate nearly 4000v high-pressure, stimulate the internal hernia flash ionization and conduction. Electrical energy stored on the capacitor through the flash tube discharge instantly transformed into light, to complete a flash.
The early life of a very short flash, and some magnesium flash tube only once. According to industry standards, then known as a million times, the real life should be far from reaching million. Now flash, through technological innovation, life should be increased.
LED flash principle: LED is not the atoms within the electron through the jump to light, but rather by the voltage added to the PN junction LED at both ends, so that the formation of a PN junction itself is level, and then jump on the electronic energy levels in this change and produce photons to luminous. Qualified under the LED life at rated power should reach 100 thousand hours or so. If the phone in the design will exceed the LED drive current is rated current to use the words, LED life expectancy will be greatly reduced to thousands or even hundreds of hours.,
2009-9-23
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