Picture display device provided with an internal vacuum support

Details Picture display device provided with an internal vacuum support Picture display device provided with an internal vacuum support

1995-10-18

1998-03-17

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 313497, H01J 2970

Patent

active

057290830

ABSTRACT:
A picture display device having an evacuated envelope (1) comprises a first wall (2) which is provided with a display screen (3), and a second wall (5), and is provided with an internal vacuum support (11) between the two walls (2, 5). The internal vacuum support (11) comprises a dielectric plate at least at the side facing the first wall (2), which plate is arranged opposite the display screen (3) and is provided with cavities (12) at the location of the pixels (4R, 4B, 4G) of the display screen (3). The internal vacuum support (11) accommodates cavities (12) which constitute a lateral system of ducts. The continuous exhaust path of the internal vacuum support (11) communicates via the exhaust cavity (25) with an exhaust connection (9).

REFERENCES:
patent: 5003219 (1991-03-01), Muragishi et al.
patent: 5270611 (1993-12-01), Van Gorkom
patent: 5313136 (1994-05-01), Van Gorkom et al.
patent: 5347199 (1994-09-01), Van Gorkom et al.
St. Regis Paper Co. J. Bemis Co. Inc 193 VSPQ 8,11 (7th Cir. 1977).

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