Phosphor activity in gradual inactivation at the same time, the phosphor emitted light wavelength with the occurrence of offset, this offset is a red offset, that is, the phosphor emission wavelength toward the red wavelength shift; this phenomenon seems to be indicating that as the temperature rises, white LED color should actually reduce, seemingly contradictory? The essence of this phenomenon is the offset of the phosphor to the red wavelength less than phosphor inactivation, the phosphor at high temperature excited out of the red light is not sufficient to compensate for the loss of red hybrid, so the performance or decreasing the temperature LED color rendering index, and white LED color rendering index fell with increasing temperature is consistent.
Can be drawn from the above analysis, to enhance the phosphor white LED color rendering index, the primary means to reduce the temperature of the LED shelf lighting section, followed by improving the adaptability of phosphors for high temperature. The third color compensation technology, the use of red or amber LED to compensate for the color rendering index.
The most effective means of reducing the LED thermostat design higher thermal performance of LED packaging, which is one of the LED shelf lighting industry in China in the near future in LED intellectual property made significant progress in the direction of, because the led high bay light is a low-voltage electronic products, electrical safety requirements are more lenient, so the thermal conductivity of the substrate material can be used more, our industry this study less, resulting in repeated breach of foreign intellectual property disputes.