high lumen rgb led

The visible light emitting diode (LED) to both high efficiency and long life characteristics. Currently, a wide range of their applications. Manufacturers have in-depth study of the LED devices have been developed with higher luminous flux, longer life, more colors and more lumens per watt of new devices. Accurate and cost-effective testing is essential to ensure the reliability and quality of the device high lumen rgb led.

high lumen rgb led

LED test with a different type of test sequences in various stages of production, such as the design and development phase of the test, wafer-level testing of the production process, and packaged final test. LED Tube Light test generally contains electrical and optical measurements, this paper focuses on the electrical characteristics of the analysis, the only part of the optical measurement techniques introduced in the appropriate position. Figure 1 shows a typical diode electrical I-V curve. The complete test should contain a large number of voltage values ​​corresponding to the current operating point, but under normal circumstances, a limited number of sample points sufficient to test the quality factor of the device.


Figure 1. Typical LED DC I-V curve and test point

Many tests required to provide a known current and measuring voltage, while some tests need to provide the voltage and then measuring the resulting current. Therefore, the high-speed test instrument with an integrated, synchronized source and measurement functions such testing is ideal rgb led.

Forward voltage testing

Forward voltage (VF) test test the LED test sequences, visible LED forward voltage. When the load a forward current in the diode, it begins conduction. Beginning at low current, the voltage drop on the diode rising rapidly, but as the driving current increases, the voltage slope begins to flatten. Diode generally work in a relatively constant voltage region. Diode tested under these working conditions is also very useful. The VF testing need to provide a known current and then measuring the resulting voltage drop in the diode. Typical test currents ranging from several tens mA to a few amps, while the size of the voltage generated is usually in the range of a few volts. Some manufacturers use the results of this test sorting devices, because of the color of the forward voltage of the LED related products (by color or complementary color wavelength and its purity common characterization of color qualityrgb led).