Interior lighting

Headlight control

Our optical sensors are used for intelligent displays, dashboards and other interior lighting for auto brightness and colour functions.

Displays are used in the centre console for multimedia and navigation, but also for rear seat entertainment and as replacement for the conventional instrument panels.

Interior illumination according to certain situations or moods is one of the big topics for car makers today, not only to strengthen the brand recognition. Scientific studies show that light colour influences mood and the condition of the driver, so it can for example support the driver not to get tired, but stay attentive during a night drive, when the surroundings are dark and the street is calm.

Ambient Light Sensors, which can be Silicon Photodiodes, Photo ICs or RGB Sensors, monitor the surrounding illuminance level in order to automatically adjust the brightness and colour of the display or illumination accordingly. This brings comfort and safety to the driver, as the human eyes are extremely sensitive and easily blinded, they cannot adjust to different light levels quickly enough.  This can create dangerous situations, if something happens on the street in that moment when the eyes are re-adjusting to the darkness outside. On the other side, the human eye, even with its huge dynamic range, has problems to see a display in direct sunlight if it is not bright enough.

The Ambient Light Sensors are available with different analog or digital outputs, such as current or voltage output, light-to-frequency converter or I2C interface. Special filters are used to achieve sensitivity close to the human eye. RGB Sensors improve the categorization of the measured light, in order to distinguish the different times of the day, weather conditions, or between natural and artificial light sources.


Beneath the ambient light, Photo ICs or RGB sensors are also used to measure the brightness and light colour of the LEDs or OLEDs of the interior lighting in operation. In this way the LEDs or OLEDs are continuously controlled and adjusted if necessary, as the human eye easily recognizes even very small deviations in brightness or colour and the components slightly change their characteristics at different temperatures or over lifetime.

Operating Temperature In special SMD package -40°C to + 125°C
Special plastic mold devices -40°C to +105°C
Customization possible, please contact us for further information
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