Spot measurement DEF


Both large and small size displays can encounter variation in color, luminance and flicker as a result of variations in production processes. Filtering or adjusting these optical characteristics early on in the production line saves time and increases yield and product quality.

To ensure the end-product quality is up to a high standard it is advisable to test displays at multiple stages during the production process.

Typical display tests include:

  • Color analysis, to ensure uniformity of color reproduction of displays
  • White point, adjusting white on displays in production settings
  • Gamma, adjusting the tonal transfer curve of the display
  • Flicker, testing and adjusting flicker supporting contrast min/max, contrast RMS, JEITA, VESA methods
  • Response time to determine a display’s reaction speed

The table below gives an overview of different display measurements and corresponding measurement devices.

Prometheus Colorimeter Prometheus Spectrometer Prometheus LF Asteria Neo
Color yes yes yes
Flicker yes yes yes yes
White point adjustment yes yes yes
Contrast ratio yes yes yes yes yes
Response time yes yes yes yes
Spectral yes yes

How are you measuring?

With fibers and other accessories even more type of measurements are possible. Often used accessories are integrating spheres, cuvettes for fluids, light sources or filter holders.

Consumers are used to enjoy top-quality displays in their mobile phones, tablets, laptops and even cars. Emerging technologies such as lighting surfaces for office and home illumination are expected to look equally perfect. Both displays and luminous surfaces are the main application areas for imaging colorimeters.