Colour sensor extracts light flickering frequencies

22nd July 2021
Mick Elliott

The VD6283 (1.83 mm x 1.0 mm x 0.55 mm) is a colour sensor from STMicroelectronics with advanced light flicker extraction.

It is in stock at distributor Digi-Key.

Light measurement is fast and accurate thanks to an individual ADC and a readout for each colour channel.

The VD6283 uses hybrid colour filters with precise responses allowing accurate computation of the correlated colour temperature (CCT) and Lux information.

It can be used for display brightness management or scene light correction.

With a patented architecture and a high-performance photodiode design, the sensor can extract light flickering frequencies to avoid banding effects on videos or check that they are safe for the human eye.

Additionally, it is the only sensor able to extract different light flicker waveforms from 100 Hz and 2 kHz, including LED square signals, that can run flicker operations simultaneously with ALS operations.

The sensor operates with cover glass on top and delivers ALS operation with six independent channels (red, green, blue, IR, clear, and visible).

A software driver is provided by STMicroelectronics.

The device works off a 1.8 V power supply. Operating temperature is -30°C to +85°C

Applications include:

  • Screen brightness control for personal electronics
  • Auto white balance colour for displays or cameras
  • Light flicker removal for cameras
  • Scene light correction thanks to Lux and CCT measurement
  • IoT display brightness control for power saving
  • Light control for smart buildings or greenhouses
  • Predictive maintenance for light ageing
  • Light flicker frequency extraction to check eye-safety

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