It is reported that Nichia has recently introduced a discrete color option for its directly installed chip series, a technology similar to the industry's chip-scale package (CSP).

It is reported that Nichia has recently introduced a discrete color option for its directly installed chip series, a technology similar to the industry's chip-scale package (CSP).

Coupled with the previously released white option, Nichia's direct-mountable chips now include royal blue, green, amber and red. Nichia said that this innovative color solution uses Nichia's unique blue die and phosphor technology. Each color chip in the new color lineup initially has the same blue die. The blue light is then converted to the desired color by adding a special phosphor mixture.

According to Nichia, this design provides the same advantages for fixture manufacturers and designers by using the same wavelength chip for each color and then converting the wavelength to the desired color using a unique phosphor mixture. Using the same wavelength chip in each color, the forward voltage of the entire directly mounted chip family can be coordinated. The same forward voltage simplifies the circuit design. In addition, unlike other discrete color techniques, the internal structure of each directly mounted chip color is the same. Therefore, the directivity (beam angle) and focal length of the light are also the same, making the optical design more intuitive. Finally, the red-on-chip is mounted by phosphor conversion, and the thermal attenuation characteristics are greatly improved compared to the conventional red AlInGaP LED. The result of this performance improvement is that the in-situ performance is greatly improved and the overall color and stability are also improved.

Nichia said that its direct-mount chip series is the first lighting CSP-type LED with unique technology that can achieve a single-sided 120° Lambertian light pattern, eliminating the crosstalk caused by lumens intensive applications. With the new color options, the expanded direct mount chip portfolio provides great flexibility for all lighting applications, including architectural lighting, color adjustment, and other commercial and residential applications.

The chip size for each color is 1.7 mm * 1.7 mm * 0.35 mm. All colors have a beam angle of 120 degrees, except that the royal blue model with a phosphor layer added and having a beam angle of 130 degrees is used.