The working principle of LED fill light and what is LED fill light?

LED fill light lamp uses LED to fill light for the photographed object. Because of its low energy consumption and high brightness, LED lamps are generally used in camera phones or digital cameras to fill the light when the light is insufficient. Because the brightness of LED is much lower than the real flash, it can only play the role of "fill light". Now some mobile phones have used the same flash as cameras, such as Sony Ericsson K790c, which uses xenon flash. The effect is better than LED fill light, but it can't be used as a flashlight like LED. The principle of LED flash lamp: LED does not emit light by jumping electrons inside atoms, but by applying voltage across the PN junction of LED, so that the PN junction itself forms an energy level, and then electrons jump on this energy level to generate photon emission. The service life of qualified LED under rated power should reach about 654.38+ million hours. If the mobile phone is designed to use LED driving current exceeding the rated current, the life of LED will be greatly shortened to thousands or even hundreds of hours. The principle of xenon flash and what is xenon flash? The principle of xenon flash lamp: after the power supply of 12V is triggered by the contact of the camera, the transformer instantly rises to a high-voltage pulse voltage of more than 20,000 volts to start the xenon in the xenon bulb, and a strong light with a color temperature of 6000 K- 10000 K is generated in the arc, and the color is crystal diamond white with a slight purplish blue. When the shutter is pressed, the shutter feeds back a signal to the CPU, and at the same time, the CPU synchronously outputs a control signal to the triode, triggering the circuit to flash. Then the triode is turned on, so that the trigger capacitor begins to discharge and pulse current is generated in the primary of the transformer. This current causes the secondary of the transformer to generate a high voltage of nearly 4000v, which excites the hernia inside the flash lamp to ionize and turn on. The electric energy stored in the capacitor is instantly converted into light energy through the discharge of the flash tube to complete a flash. Xenon flash lamp, also known as high intensity gas discharge flash lamp. Xenon flash lamp is composed of xenon bulb, transformer ballast and insulated wire, which uses special xenon to discharge under ultra-high voltage. Early flashlights had a short life, and some magnesium tubes could only flash once. According to industry standards, people who were called 10,000 times at that time should live far less than 10,000 times. The current flashlight, after technical transformation, should have a longer life.