Method of manufacturing a screen assembly having a planarizing layer
US5455133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1994 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Aug 30, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2276
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 of a color CRT 10 comprises the steps of coating the interior surface of the panel with a volatilizable, organic conductive material to form an organic conductive (OC) layer 32, and overcoating the OC layer 32 with a volatilizable, photoconductive material to form an organic photoconductive (OPC) layer 34. Then, a substantially uniform voltage is established on the OPC layer 34, and selected areas of the OPC layer 34 are exposed to visible light to affect the voltage thereon, without affecting the voltage on the unexposed area of the OPC layer 34. Next, triboelectrically charged, light-absorbing screen structure material is deposited onto the unexposed area of the OPC layer 34 to form a substantially continuous matrix 23 of light-absorbing material having open areas therein. The present method is an improvement over prior methods in that the present method includes the additional steps of forming a planarizing layer 35, 135 on the OPC layer 34; overcoating the planarizing layer 35, 135 with a second coating of the v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.