In automotive lighting, below are the possible Challenges in RGB LED Calibration:
- Non-linear Brightness Adjustments: Adjusting LED brightness isn’t straightforward. When designers modify current levels to change brightness, RGB components don’t respond in a predictable, linear way. This can lead to colour inconsistencies, especially when brightness varies.
- Temperature-Induced Colour Shift: LEDs are sensitive to temperature changes. In automotive environments, where temperatures vary widely, LED colours tend to shift, compromising intended colours and uniformity.
- Module Surface Effects: RGB LEDs emit light through various module surfaces, and different surface materials can alter the perceived colour. When multiple LEDs interact with various textures, it’s difficult to maintain a uniform appearance.
Brightek’s Ultimate PWM Program (UPP) software is aiming to achieve rapid, reliable colour calibration by transforming the complex task of RGB LED alignment into a streamlined process. Rather than relying on time-consuming manual adjustments, UPP uses an advanced algorithm that converts the X/Y axis on a CIE colour system into precise Pulse Width Modulation (PWM) settings, enabling highly accurate colour adjustments across LEDs.
This conversion process is critical for achieving uniform colour output across multiple LEDs on the same surface or light bar. By mapping each LED’s colour precisely to the target coordinates on the chromaticity scale, UPP try to ensure every LED displays the same colour—even if LEDs have slight variations in manufacturing, as per Brightek states, with an impressive 99% accuracy.
How UPP Calibrates Colours?
- Converting Chromaticity Coordinates to PWM: UPP translates the X/Y values on a CIE colour coordinate into corresponding PWM signals. PWM allows the software to control the RGB intensity levels precisely
- Uniform Colour Across All LEDs: Once the PWM settings are calibrated, every LED on the same surface or light bar will display a consistent colour, even if individual LEDs naturally emit light with subtle variations.
- Adaptable for Complex Installations: For Automotive Lighting where LEDs often interact with different surfaces, materials, and module designs, UPP’s PWM-based approach can be a good solution.
UPP aim to bring designers below benefits:
- Save Time: UPP’s swift calibration process, by using Brightek superb EVO 3838 ICLED, is 5X faster than traditional methods
- Achieve Greater Precision: With high-fidelity algorithms, UPP delivers 99% accuracy in seconds using EVO 3838 ICLED
- Ensure Long-Term Reliability: Managing both brightness and temperature-induced colour shifts
