Flat display device

Details Flat display device Flat display device

1980-08-15

1982-10-26

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

3151693, H01J 2950

Patent

active

043564275

ABSTRACT:
Within a vacuum envelope constituted by a back base plate and a display panel, a thermionic cathode structure and first to third electrode structures are arranged in the mentioned order from the side of the back base plate to the side of the display panel. In the thermionic cathode structure a plurality of coiled heaters are arranged in a planar array such that each coiled heater corresponds in position to each of picture element regions regularly arranged in a fluorescent material layer provided on the inner side of the display panel. The coiled heaters are supported such that their effective thermionic electron emitting portions are held in space such that each of these portions corresponds to each of the picture elements, and their other portions are supported by a plurality of support members. These support members are arranged such that all the coiled heaters are connected in parallel to a heating power supply.

REFERENCES:
patent: 3408532 (1968-10-01), Hultberg et al.
patent: 3432710 (1969-03-01), Gumpertz
patent: 3935500 (1976-01-01), Oess et al.
Gunther et al., "A Flat Alphanumeric Display Tube," IEEE Transactions on Electron Devices, vol. ED-18, #9, Sep. 1971, pp. 692-697.

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