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Modular type guided beam flat display device
| Details |
Inventors: Marlowe, Frank Jerome; Anderson, Charles Hammond;
Assignee: RCA Corporation (New York, NY)
Primary Examiner: Segal; Robert
Assistant Examiner:
Attorney, Agent or Firm: Bruestle; G. H., Cohen; D. S., Haas; G. E.
An evacuated envelope has a rectangular display section and a gun section at one edge of the display section. The display section includes front and back walls which are generally rectangular, in closed spaced, parallel relation, and a plurality of spaced, parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes therein gun structure which will direct electrons into the channels. In each of the channels is a beam guide which confines the electrons in a beam and guides the beam along the length of the channel. The beam guide also includes means for selectively deflecting the electron beam out of the guide at selective points along the guide so that the beam will impinge upon a phosphor screen along the inner surface of the front wall. In each of the channels is a scanning deflector which deflects the path of the beam as it passes from the guide to the phosphor screen so that each of the beams will scan a portion of the phosphor screen. The beams in each channel are scanned transversely across its portion of the screen in a transverse direction opposite to that of the beams in the adjacent channels. |
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DETAILED DESCRIPTION Referring to FIG.
1, a flat display device including the scan deflection structure of the present invention is generally designated as 10.
The display device 10 comprises an evacuated envelope 12, typically of glass, having a display section 14 and an electronic gun section 16.
The display section 14 includes a rectangular front wall 18 which is the viewing screen, and a rectangular back wall 20 in spaced parallel relation to the front wall 18.
The front wall 18 and back wall 20 are connected by side walls 22.
The front wall 18 and back wall 20 are dimensioned to correspond with the size of the viewing screen desired, e.
g about 30 inches by 40 inches (75 cm by 100 cm) and are spaced apart typically about 1-3 inches (2.
5 to 7.
5 cm).
As shown in FIG.
2, a plurality of spaced, substantially parallel, support walls 24, made of an electrically insulating material, such as glass, are secured between the front wall 18 and the back wall 20 and extend from the gun section 16 to the opposite side wall of the envelope 12.
The support walls 24 provide the internal support for the evacuated envelope 12 against external atmospheric pressure, and divide the display section 14 into a plurality of channels 26.
The edge of each of the support walls 24 which extends along the front wall 18 are tapered so as to provide a minimum area contact between the supporting walls 24 and the front wall 18.
On the inner surface of the front wall 18 is a phosphor screen 28.
For a black and white display the phosphor screen 28 is of any well known composition used in black and white display devices.
For a color display, the phosphor screen 28 is preferably made up of alternating strips of conventional phosphor compositions which emit red, green and blue when excited by electrons extending longitudinally along the channels.
On the phosphor screen 28 is a film 30 of an electrically conductive metal, e.
g.
aluminum, which is transparent to electrons.
For a color display, a shadow mask 32 extends across each of the channels 26 adjacent to but spaced from the phosphor screen 28
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Manufacturing Materials 
