led portable lights factory

 The new module led portable lights factory is 6 cm x 10 cm, and the pitch is about 700 µm or less. After a lot of hard work, this year has finally made the red light 'bright'. Micro LED technology has been discussed for many years. Fang Yanxiang explained that the Micro LED chip must first be bonded to a temporary substrate made of silicon or glass during the manufacturing process, and then the sapphire substrate is removed by laser lift-off, and then the original LED structure is flipped in the form of flip chip.

Face down, and make the P-type and N-type electrodes on the same side, which is more difficult for Micro LEDs that are scaled down to the micron level. A slight improper pressure may reduce the success of red light transfer. Under certain power consumption requirements, it is very difficult to reach 100,000 nits. Weakening the structure is a key to the success of mass transfer. In particular, red light is limited by materials and characteristics, and perhaps even a 50% yield may not be achieved. The Mini LED display module of Taiwan Industrial Technology Research Institute adopts PCB substrate,

the module size is 6 cm x 6 cm, the pitch is less than 800 μm, and the resolution is 80 x 80 pixel. Fang Yanxiang, deputy head of the Intelligent Application Microsystem Group of the Institute of Electro-Optics of Taiwan Industrial Technology Research Institute, mentioned two major technical problems. Last year, the passive matrix drive ultra-fine-pitch Micro LED display module developed by Taiwan Industrial Technology Research Institute and the third factory successfully transferred the Micro LED array chip directly to the PCB substrate, but the RGB full-color only lacks red light. Just looking at the yield rate of the available area is not enough.'

Fang Yanxiang took a 4-inch LED wafer as an example and pointed out that after the wafer has an outer diameter of 2 mm, the yield of the usable area is It may reach 99% under a single standard value, that is, just look at the wavelength (Dominant Wavelength, Wd), the driving voltage (Forward Voltage, Vf) or the reverse leakage

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wholesale Led Flood Lights

This means that when the LED forward bias voltage is 9V, the LDD-350H input will work normally in the range of 12~56VDC. In this case, the converter starts to work at full output. Even if the current is still within the acceptable range of the power supply, the power supply cannot work stably because the voltage is below the minimum operating range and will enter hiccup mode to restart .

This type of problem is related to the moment when the input is turned on. The main cause of the problem is the current converter (DC/DC). If the AC power supply fails to rise to the normal voltage after the power is turned on, the converter will start full power output. At the initial start, DC/DC will gradually increase the output and input power.

The input power formula is as follows: Use a voltage-current converter (DC to DC) Possible problems: Commercially available long-strip lamps or small spotlight products with DC input usually contain voltage-current converters similar to MEAN WELL LDD series or LDH series.

Because the driver needs a certain amount of time from booting to the output rising to the normal voltage, if the input point of the converter is low and there is no soft-start mechanism (the output power gradually increases from low to high), it is possible to increase the output of HLG-320 from 0V to 24V. 2) Before the PSU voltage is successfully established (@230VAC <0. If customers encounter similar problems, it is recommended to confirm the specifications of LED and DC converters before consulting MEAN WELL service personnel for suitable products.

When it enters low wholesale Led Flood Lights, the power supply may not work under normal working conditions and cause problems. Because 24V voltage power supply is more common in practice, it is very likely that 24V power supply will be recommended in the lighting catalog. Voltage-current converters: Generally, there are three types of DC converter architectures commonly used in LED current limiting, boost, buck, or buck-boost. No matter what kind of converter, the allowable value of its input voltage has a wide range of characteristics. Before entering the topic, let me introduce the following three matching modes for common LED lamp circuit drive designs: 1) Direct drive:

 

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