Demonstrator of RGB LED Regulator
Pictures
( Press release from 14.11.2006 )
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MAZeT displays test construction for exact adjustment of colors in LEDs
The testing system is based on the reliable JENCOLOR True Color Sensor MTCSiCS by MAZeT. This construction demonstrates an LED regulator that produces a readjustment of the LED combination colors. This can be carried out to a quality where no color difference is noticeable to the human eye. The function on show can be used to compensate for temperature and ageing effects when using LEDs. Customers can evaluate their software algorithm for regulation and control. This is very significant for LED-based illumination systems with high color consistency requirements.
Two RGB PowerLED modules, which are located in directly adjoining light wells, serve as the light source. The color ratios are controlled via pulse width modulation. They can be set from the PC via a serial interface. The combination colors are respectively visible on a diffuser disc and can be directly compared (color matched) with each other.
Both light wells are equipped with an MTCS-C2 module. Alongside the True Color sensor MTCSiCS, this contains the programmable signal gain and processing as well as a USB interface. Each MTCS-C2 module includes the created combination color on the diffuser surface of a light well. The measurement data is transferred via USB and visualised in two color diagrams respectively on a PC. The chromaticity coordinate difference is also displayed.
In general, various color temperatures can be set or any combination colors can be created / accidentally generated by means of an LED module. This color specification is evaluated with an MTCS-C2 module and the adjoining LED module, which is evaluated with the second MTCS-C2 module, is readjusted with a suitable standard algorithm, until the chromaticity coordinate differences recorded by both MTCS-C2 modules correspond to a pre-defined minimum quality.
Figure 2 shows the demonstrator construction with two LED combination color surfaces which are compensated for by each other, and their visualisation on a PC.
The testing system is based on the reliable JENCOLOR True Color Sensor MTCSiCS by MAZeT. This construction demonstrates an LED regulator that produces a readjustment of the LED combination colors. This can be carried out to a quality where no color difference is noticeable to the human eye. The function on show can be used to compensate for temperature and ageing effects when using LEDs. Customers can evaluate their software algorithm for regulation and control. This is very significant for LED-based illumination systems with high color consistency requirements.
Two RGB PowerLED modules, which are located in directly adjoining light wells, serve as the light source. The color ratios are controlled via pulse width modulation. They can be set from the PC via a serial interface. The combination colors are respectively visible on a diffuser disc and can be directly compared (color matched) with each other.
Both light wells are equipped with an MTCS-C2 module. Alongside the True Color sensor MTCSiCS, this contains the programmable signal gain and processing as well as a USB interface. Each MTCS-C2 module includes the created combination color on the diffuser surface of a light well. The measurement data is transferred via USB and visualised in two color diagrams respectively on a PC. The chromaticity coordinate difference is also displayed.
In general, various color temperatures can be set or any combination colors can be created / accidentally generated by means of an LED module. This color specification is evaluated with an MTCS-C2 module and the adjoining LED module, which is evaluated with the second MTCS-C2 module, is readjusted with a suitable standard algorithm, until the chromaticity coordinate differences recorded by both MTCS-C2 modules correspond to a pre-defined minimum quality.
Figure 2 shows the demonstrator construction with two LED combination color surfaces which are compensated for by each other, and their visualisation on a PC.
Pictures