Visual display with cathode plate connected to a separate backplate
OwnerIngemar V Rodriguez, William P Bischoffinventors
Life of this patent
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Abstract
A visual display has a cathode plate 101, having an emission layer 102 built up on a ceramic front layer. It has a thicker foundation layer 103. Vias from the front layer have their pitch fanned out to that of the cathode-plate back-layer vias 104. Other main components of the visual display are a frame 111, a back plate 112 and an anode 114 plate. The back plate and the frame are integrally formed of a number of layers of tape cast ceramic material. The back plate has a via and interconnect fan-out. The frame also has a via and interconnect arrangement for making electrical connection to the anode plate.
Claims23
A visual display comprising:
- a cathode plate in the form of a field effect emission device including:
- a substrate and
- an emission layer on one face of the substrate, the emission layer having:
- a multiplicity of emitters and gates, arranged as an array of emission pixels and
- conductive connections in the emission layer to the emitters and the gates;
- the substrate having:
- first conductive vias provided through the substrate or at least a front layer thereof to at least some of the said conductive connections in the emission layer for electrical connection to their emitters and gates and
- second conductive vias depending from a back layer of the cathode plate, and
- an anode plate;
- characterised in that it includes:
- a separate back plate, wherein the cathode plate back layer is carried on the front side of the back plate, the back plate being continuous across the back side of the cathode plate;
- and
- a frame connecting the back plate to the anode plate;
- and
- further wherein for connection to the cathode plate, the back plate has vias in a front layer positioned to connect via solder connections with the second vias depending from the conductive back layer of the cathode plate.
A visual display comprising:
- a cathode plate in the form of a field effect emission device including:
- a substrate and
- an emission layer on one face of the substrate, the emission layer having:
- a multiplicity of emitters and gates, arranged as an array of emission pixels and
- conductive connections in the emission layer to the emitters and the gates;
- the substrate having:
- conductive vias provided through the substrate or at least a front layer thereof to at least some of the said conductive connections in the emission layer for electrical connection to their emitters and gates and
- an anode plate;
- characterised in that it includes:
- a back plate, the cathode plate being carried on the front side of the back plate;
- and
- a frame connecting the back plate to the anode plate;
- wherein, for assembly of the cathode plate to the back plate in correct position for electrical connection:
- the back plate is provided with apertures for handling pins, the apertures being plugged in the finished display and
- the back side of the cathode plate is provided with recesses for the handling pins in register with the apertures.
Dependencies are inferred from the claim text.