Assertion: cathode ray tube | /r/HasAspect | faceplate
Facets:
value: for improving the contrast
type: PURPOSE
value: in front of the faceplate
type: LOCATION
Source sentences:
text: Another cathode ray tube having a faceplate or a glass plate in front of the faceplate containing neodymium oxide (Nd₂O₃) for improving the contrast without reduction of the image brightness has been proposed in U.S. patent No.4,728,856 and Japanese Patent Disclosure No.57-134848, 57-134849 and 57-134850.