Grooved anode plate for cathodoluminescent display device
AssigneeTexas Instruments Incorporated
InventorJules D. Levine
Life of this patent
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Abstract
A face plate (10) of an FED image display has a grooved rear surface (25) formed with projections (36). Projections (36) have surfaces (39) covered in regions (58, 59) with electrical conductive material (54) and different color emitting phosphor particles (56a, 56b). The regions (58, 59) define different color anode combs. Surfaces (39) in regions (61) between regions (58,59) are covered with insulative, light absorbing material (62) for absorption of ambient light. Surfaces (39) are formed to encourage forward direction of phosphor-emitted light. In one embodiment, surfaces (39) serve to channel ambient light rearwardly toward projection apexes (40) which are covered with light absorbing material (62). Projections (36) may be parallel elongated prisms, pyramids or cones.
Claims19
An anode plate for a cathodoluminescent display, comprising:
- a substrate of transparent material having a surface;
- said surface having a plurality of grooves defining ridges and valleys joined by sloped connecting surfaces;
- a layer of electrically conductive material conformally deposited within said grooves to cover at least said sloped connecting surfaces;
- and
- a layer of cathodoluminescent material conformally deposited on at least said sloped connecting surfaces over said electrically conductive material.
An anode plate for a cathodoluminescent display, comprising:
- a substrate of transparent material having a surface which is grooved to provide a periodic array of projections and recesses, defined by alternating ridges and valleys, with sloped connecting surfaces converging rearwardly at ridge tops and forwardly at valley bottoms;
- first and second stripes of electrically conductive material deposited in laterally separated positions, conformally over said surface within said grooves providing respective different pluralities of said projections and recesses;
- cathodoluminescent material of a given color emissivity deposited conformally over said grooved surface over said conductive material of said first stripe;
- and
- cathodoluminescent material of a different color emissivity deposited conformally over said grooved surface over said conductive material of said second stripe.
Dependencies are inferred from the claim text.