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US 6,762,548 B2Granted
Color picture screen with blue phosphor layer
AssigneeKoninklijke Philips Electronics N.V.
InventorsHans-Helmut Bechtel, Wolfgang Busselt, Thomas Juestel, Martin Weibrecht, Peter Quadflieg
Life of this patent
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Abstract
The invention relates to a color picture screen with an improved blue light emission. The blue phosphor layer comprises a first blue-emitting phosphor and a second phosphor which shows a light emission in the range from 380 to 450 nm.
Claims8
A color picture screen provided with a blue phosphor layer comprising a mixture of:
- particles of a first phosphor having a light emission in the range from 430 to 490 nm;
- and particles of a second phosphor having a light emission in the range from 380 to 450 nm.
Dependencies are inferred from the claim text.