Basic Display Metrology (Part 2)

Electronic display devices go through a series of adjustment and calibration to ensure performance standards. This article explains briefly some of the performance criteria.

1. White Balance

A display must maintain the same color temperature throughout the entire luminance range. Skin tones must be consistent from dark to bright

2. Gamma

• A display device uses electrical signal to produce an optical output and this relationship is not linear. Generally, the light output is proportional to the driving voltage raised to a power of 1 to 3 depending on the device technology. A good display aims for a good gamma correction to deliver true colors throughout the luminance range.
• White patterns with luminance levels from 0 to 100% in steps are measured and the white should be consistently neutral throughout the range. Greyscale tracking is a technique used to check that the white remains neutral with no color tint.

• The fruit basket colors get saturated at a higher gamma.
• The sea and mountains look realistic as the blue and green tones are pulled back


Konica Minolta Display Color Analyzer CA-410 with wide luminance measuring range from 0.001 to 5,000 cd/m2, is capable of measuring extremely low to high luminance.

To understand more about display metrology, contact us for a free consultation.