Display: spot measurements

Both large and small size displays can encounter variation in colour, 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 customer satisfaction. To ensure the end-product quality is up to a high standard it is advisable to test displays at several stages during the production process. Typical display tests include:

Colour analysis, to ensure uniformity of colour reproduction of displays. Flicker, testing and adjusting flicker supporting contrast min/max, contrast RMS, JEITA, VESA methods. White point, adjusting white on displays in production settings. Response time to determine a display’s reaction speed.

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

Display
 Hyperion MSE  Rhea Hera Cronus Asteria
 Colour analysis X X X X X  
 Flicker analysis X X     X X
 White point adjustment X X X X X  
 Contrast ratio analysis X X X X X X
 Response time analysis X X     X X
 Spectral analysis     X X X  

For larger displays multiple spot measurements are often used. To control several measurement devices simultaneously a Medusa Device controller can be used.