G PHYSICS
G09 EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
G09G2320/00 Control of display operating conditions
G09G2320/02 Improving the quality of display appearance
G09G2320/0242 Compensation of deficiencies in the appearance of colours