EP0572777A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cathodoluminescent display apparatus and method for realization
Assignee: Motorola Solutions Inc
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Filing: 1993-03-29
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Granted: —
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Expires: 2013-03-29
Abstract
Abstract Cathodoluminescent display apparatus employing an electron source including a plurality of diamond crystallites (403). Image display apparatus employing an array of picture elements, each picture element having associated therewith an electron source including electron emitting diamond crystallites (403), is realized as a preferred embodiment.
Inventors
- 👤 James E. Jaskie
- 👤 Lawrence Dworsky
- 👤 Robert C. Kane
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:08
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J1/3042; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/304; H01J2201/30403; H01J2201/30446; H01J2201/30453; H01J2201/30457
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
197 words
Cathodoluminescent display apparatus including a supporting substrate (401) having a major surface and characterized by: a plurality of diamond crystallites (403), for emitting electrons, disposed in a random orientation on the major surface of the supporting substrate; an insulator layer (405) disposed on any exposed part of the major surface of the supporting substrate and further disposed on the diamond crystallites; a plurality of apertures (409) defined in the insulator layer and extending therethrough; a control electrode (407) disposed on the insulator layer and substantially peripherally about the plurality of apertures; and an anode (412), for collecting emitted electrons, including a substantially optically transparent faceplate (413), a substantially optically transparent conductive layer (415) disposed on the faceplate, and a cathodoluminescent layer (417) disposed on the conductive layer, all in fixed space relationship and distally disposed with respect to the electron emitting diamond crystallites such that upon application of a voltage (419) between the substantially optically transparent conductive layer and the supporting substrate, electrons are emitted by the diamond crystallites and collected at the substantially optically transparent conductive layer after having first traversed the thickness of and having imparted energy to the cathodoluminescent layer to excite photon emission.
Claim 2
Dependent Claim
44 words
Cathodoluminescent display apparatus as claimed in claim 1 further characterized by a plurality of conductive/semiconductive paths (411) disposed on the major surface of the supporting substrate with the plurality of diamond crystallites being disposed in a random orientation on the plurality of conductive/semiconductive paths;
Claim 3
Dependent Claim
34 words
Cathodoluminescent display apparatus as claimed in claim 2 further characterized by a plurality of control electrodes (407) each disposed on the insulator layer and substantially peripherally about at least a part of the apertures.
Claim 4
Dependent Claim
104 words
Cathodoluminescent display apparatus as claimed in claim 3 further characterized by a controlled constant current source (423) operably coupled between one conductive/semiconductive path of the plurality of conductive/semiconductive paths, such that by selectively applying a voltage (419) to the substantially optically transparent conductive layer and providing controlled current to the plurality of conductive/semiconductive paths and providing voltages (421) to the plurality of control electrodes electron emission is induced from some of the plurality of diamond crystallites and subsequently collected at the substantially optically transparent conductive layer after having first traversed the thickness of and imparted energy to the cathodoluminescent layer to induce photon emission.
Claim 5
Dependent Claim
88 words
Cathodoluminescent display apparatus as claimed in claim 1 further characterized by a plurality of picture elements each of which includes some of the plurality of diamond crystallites, for emitting electrons, and voltage and controlled current sources for independently energizing each of the plurality of picture elements, such that any electron emission from diamond crystallites of each picture element of the plurality of picture elements will energize a corresponding cathodoluminescent layer associated with the picture element to an extent determined by the controlled current source to provide an image.
Claim 6
Independent Claim
49 words
A method for forming cathodoluminescent display apparatus including the step of providing a supporting substrate (401) having a major surface and characterized by the step of: depositing a plurality of substantially randomly oriented diamond crystallites (403) on at least a part of the major surface of the supporting substrate.
Claim 7
Dependent Claim
52 words
A method for forming cathodoluminescent display apparatus as claimed in claim 6 wherein the step of depositing is further characterized by depositing a plurality of conductive/semiconductive paths (411) on the surface of the supporting substrate and depositing the plurality of substantially randomly oriented diamond crystallites (403) on the plurality of conductive/semiconductive paths.
Claim 8
Dependent Claim
42 words
A method for forming cathodoluminescent display apparatus as claimed in claim 6 further characterized by the step of depositing an insulator layer (405) on any exposed part of the major surface of the supporting substrate and on the plurality of diamond crystallites.
Claim 9
Dependent Claim
63 words
A method for forming cathodoluminescent display apparatus as claimed in claim 8 further characterized by the step of depositing a plurality of control electrodes (407) on the insulator layer and selectively removing some of the material of each of the control electrodes and insulator layer to define a plurality of apertures (409) therethrough to expose diamond crystallites of the plurality of diamond crystallites.
References Cited (Backward Citations)
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