GOST R 59361-2021
Flexible display devices. Part 5-2. Measuring methods of optical characteristics from the vantage point for curved displays

Scope: This standard provides general rules and detailed descriptions of optical methods for measuring the performance of curved emissive and transmitting displays such as OLED and LCD from a fixed point (the so-called sweet spot) in a dark room environment. This standard applies primarily to large format (non-portable) concave displays that are curved around a horizontal and/or vertical axis with a fixed or variable radius of curvature. The measurement methods specified in this standard are used to evaluate the following characteristics of curved display modules: 　——changes in brightness observed from the sweet spot as a function of viewing angles; 　——changes in contrast observed from the most favorable viewing point depending on viewing angles; 　——changes in the color of white, observed from the most favorable viewing point, depending on viewing angles; 　——changes in the area of the color gamut observed from the most favorable viewing point depending on viewing angles; 　——changes in the chromaticity of primary colors observed from the most favorable viewing point depending on viewing angles; 　——uniformity of brightness and changes in uniformity depending on viewing angles; 　——uniformity of color and changes in uniformity depending on viewing angles; 　——viewing angle with half brightness; 　——viewing angle with half contrast

GOST R 59361-2021 history

2021 GOST R 59361-2021 Flexible display devices. Part 5-2. Measuring methods of optical characteristics from the vantage point for curved displays