Abstract A glass faceplate panel for use in manufacturing an image screen structure for a monochrome or a color cathode-ray tube, in which the phosphor screen is interposed between a composite mesh and the conventional reflective metal backing layer. The composite mesh comprises a reflective grille and a non-reflective grille in registration with the reflective grille. The reflective grille faces the phosphor screen so that light generated by phosphor excitation behind the non-reflective grille finds egress by multiple reflections between the reflective grille and the metal backing layer. In a color cathode-ray tube such as a tri-color shadow-mask television picture tube, the non-reflective and reflective grilles may be non-coherent with the mosaic phosphor screen, thus avoiding the necessity of complicated and costly processing which has been employed in the manufacture of blacksurround color picture tubes. A substantial improvement in brightness/contrast performance is obtained as compared with the best prior art monochrome and color cathode-ray tubes.
As a separate article of commerce, for use in manufacturing a cathode-ray tube image screen, the subcombination comprising a glass faceplate panel adapted to receive a phosphor screen on its inner surface and precoated with reflective and non-reflective grilles in registration with each other.
Claim 2
Dependent Claim
44 words
As a separate article of commerce, for use in manufacturing a cathode-ray tube image screen, the subcombination comprising a glass faceplate panel adapted to receive a phosphor screen on its inner surface and precoated with reflective and non-reflective grilles in registration with each other.
Claim 3
Dependent Claim
44 words
As a separate article of commerce, for use in manufacturing a cathode-ray tube image screen, the subcombination comprising a glass faceplate panel adapted to receive a phosphor screen on its inner surface and precoated with reflective and non-reflective grilles in registration with each other.
Claim 4
Dependent Claim
44 words
As a separate article of commerce, for use in manufacturing a cathode-ray tube image screen, the subcombination comprising a glass faceplate panel adapted to receive a phosphor screen on its inner surface and precoated with reflective and non-reflective grilles in registration with each other.
Claim 5
Dependent Claim
16 words
The subcombination of claim 1, in which said grilles present a light-transmission factor of approximately 50%.
Claim 6
Dependent Claim
34 words
The subcombination of claim 1, in which said non-reflective grille is formed of black light absorbing material and said reflective grille is composed of a white opaque material having a high index of refraction.
Claim 7
Dependent Claim
20 words
The subcombination of claim 3, in which said black material comprises graphite and said white opaque material comprises titanium dioxide.