In recent years, more driver assistance features (e.g., adaptive cruise control, vehicle distance/white line detection) have been introduced as vehicles become increasingly electronic and sophisticated. Consequently, there is a growing demand for RGB LED chips capable of displaying a range of colors to indicate operating status on instrument panels and gauge clusters. Furthermore, there is a growing need to create a comfortable and luxurious interior space with decorative RGB LED lighting.
In response, ROHM has developed an RGB LED chip that further minimizes color variation by precisely controlling the luminous characteristics of the RGB elements and improving color mixing through proprietary device technology.
Typically, developing RGB LED chips that emit light in a specified color requires precise control of the wavelength and brightness of the individually mounted red, green, and blue (RGB) elements, as well as methods to enhance color mixing capabilities. ROHM has minimized color variation in its elements compared to general products by employing a vertically integrated production system from the element manufacturing stage onward—a key strength of ROHM. Simultaneously, ROHM's original color mixing control technology reduces color variations caused by the color mixing inherent in RGB chip LEDs, resulting in the accurate color expression necessary for automotive interiors. ROHM also supports detailed color matching tailored to user specifications with its chromaticity simulation system.
ROHM will continue to contribute to improving comfort and safety inside vehicles by developing industry-leading products optimized for automotive lighting through a quality-first approach.
chromaticity simulation system
establishes adjustment coefficients for each chromaticity range while providing calibration support to bring the color closer to the desired target. This new RGB LED chip and high-precision chromaticity simulation enable precise color adjustment.
Product range
Application examples
Function/status indicators: Instrument clusters, CID, car audio/navigation, heating control, etc.
Car ambient lighting: Footwells, roof, grab handles, cup holders, etc.
