G
PHYSICS
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G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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G09G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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2320/00
Control of display operating conditions
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G09G2320/10
Special adaptations of display systems for operation with variable images
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G09G2320/103
Detection of image changes, e.g. determination of an index representative of the image change
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