Spectrum photoelectric Yin Hui: four ways to improve the quality of LED light source

LED lighting has changed from a few years ago to the pursuit of health and energy saving stage of the era of intelligence, improve the quality of light, LED light source, such as increasingly intelligent key. "In February 20th by the state assembly consulting its LEDinside and CNLED net (the original" LED "Chinese network analysis) will jointly organize the 2017 chief adviser market (ShangHai Railway Station), said Shengpu photoelectric deputy general manager, packaging department executive general manager Yin Hui in the" light quality intelligent lighting era LED light source package the technology and application "as the theme of the speech.

High light quality performance in the real object can restore the color and better performance of real objects. The quality of light is an important index to measure the quality of the light source. The factors that affect the quality of the light include color temperature, color rendering index, color consistency and color fluctuation. Yin Hui believes that by choosing the appropriate color temperature, enhance the color rendering index, improve the consistency of the color of the light source and control the color drift to improve the quality of LED light source.

To improve the color rendering index of LED light source usually starts from the phosphor, but the brightness and the color rendering index are mutually restricted, so that the bandwidth of the excitation spectrum of the phosphor is broadened to the direction of the long wavelength, but the brightness is reduced. The increase is the mainstream of the current practice of red wavelength.

The higher the color rendering index Ra, the better the quality of light? By comparison, this kind of formulation is one-sided. CRI is the source of continuous emission spectra of blackbody radiation based on the proposed, the spectrum is steep, narrow spectral band may cause problems, so the actual test found that sometimes the color index lower than LED and high color index LED with color is more perfect, the key is R9 the value is very important, R9 > 0 is currently the most basic requirements of LED light source.

The more bright and full (Ra > 82, R9 > 10) lack luster (Ra > 84, R9 < 0)

To improve the LED color consistency is to reduce the color difference between the light source, measure the color size with color tolerance, combined with the current industry McAdam theory, LED light source color tolerance is light color tolerance control in the 3 and 4 order, 6 order less than in control. You can reduce the color drift by optimizing the chip array arrangement, reduce heat accumulation, low thermal resistance, low heat should be selected LED substrate force, high cost, optimal selection of packaging materials (solid crystal glue, fluorescence powder, silica gel) and other ways to achieve.

The 7 McAdam order and 5 order and 3 order, 2 order SDCM, LED source 3000K color color contrast

In addition, Yin Hui said that the current high quality intelligent LED light source packaging technology mainly includes fluorescent powder layer spraying and selective spraying technology, full spectrum technology and new eutectic technology. As for the new eutectic technology, the development and industrialization of the chip eutectic technology based on the flux material, which makes the void ratio of the LED eutectic die down to 10%, some of which reach to 5%! At present, the average thrust of the encapsulated LED chip is higher than 10Kg, which is far beyond the average level of the solid crystal 3Kg, which greatly improves the reliability of the package.

L spectrum introduced a variety of dimming COB light source, and applied for invention patents. It solves the problem of consistency, angle and facula of the double color temperature or the polychromatic light.

Honeycomb distribution zebra striped distribution analog continuous dimming incandescent lamp

At present, the high quality intelligent LED light source is widely used, such as: fresh light high-end commercial lighting, European standard, American Standard, clothing and special field fresh lamp lighting applications, aquarium lighting, lighting and other plants. Yin Hui said the rise spectrum has focused on LED packaging business, quietly in the LED market segment, intelligent lighting will be the focus of development in the field of the next, and in the car with LED, UV LED, infrared LED, LED and other market segments to increase plant growth package development efforts. (text: LEDinside Nicole)

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