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US 6,556,254 B1Granted
Black and white level stabilization
AssigneeKoninklijke Philips Electronics N.V.
InventorAugusto Palmero
Life of this patent
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Abstract
In a black and white level stabilization device, an OSD signal generator (OSD-SG) generates black and white reference signals (OSD-R/G/B), amplifying circuits (VA-R/G/B) amplify the black and white reference signals (OSD-R/G/B) or RGB signals (Ri, Gi, Bi), and a measuring circuit (PNP-R/G/B, RM), coupled to the amplifying circuits (VA-R/G/B), measures a white level and a black level in response to the black and white reference signals (OSD-R/G/B).
Claims2
A method for performing black and white level stabilization in a display device having an On-Screen Display signal generator, said method comprising the steps:
- generating black and white reference signals using said On-Screen Display signal generator;
- amplifying said black and white reference signals;
- and
- measuring a white level and a black level in said display device in response to the black and white reference signals.
1 more element
Dependencies are inferred from the claim text.