Ascending spectrum photoelectric Yin Hui: four major ways to improve the quality of LED light source

"LED lighting has shifted from the energy saving phase in the past few years to the pursuit of health and intelligence, and it has become increasingly critical to enhance the quality of light and the intelligence of LED light sources." In February 20th by the state assembly consulting its LEDinside and CNLED network (formerly "China LED network") analysis will be jointly organized by the 2017 chief adviser market (ShangHai Railway Station), Shengpu photoelectric packaging division deputy general manager, executive general manager Yin Hui said in his speech to the light quality under the era of intelligent lighting LED light source package the technology and application "as the theme of the.

High light quality results in the ability to really restore object colors and better represent real objects. Light quality parameters are very important indicators to measure the quality of light sources. The factors that affect the quality of light include color temperature, color rendering index, color consistency and color drift. According to Yin Hui, the light quality of LED light source can be improved by choosing proper color temperature, enhancing the color rendering index of light source, improving the consistency of light source color and controlling color drift.

Increasing the color index of LED light source usually starts with phosphor, but the brightness and color rendering index are independent of each other, so that the bandwidth of the excitation spectrum of phosphor is widened and goes to the long wave direction, but the brightness will decrease. The increase is the mainstream of the current practice of red wavelength.

The higher the color index Ra, the better the quality of light? In fact, this approach 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 phosphor powder, layered spraying and selective spraying technology, full spectrum technology and new eutectic technology. As far as new eutectic technology is concerned, the development and industrialization of chip eutectic technology based on flux materials has greatly reduced the hole rate of eutectic LED to 10%, among which some products have reached 5%! At present, the average thrust of the packaged LED chip is higher than 10Kg, far more than the average level of the silver paste solid crystal 3Kg, greatly improving the reliability of the packaging device.

Up spectrum recently introduced a variety of dimming COB light source, and applied for invention patents. It successfully solves the problem of consistency, angle and spot of dual color temperature or multi-color temperature regulating light in lamps and lanterns.

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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