Method of manufacturing a luminescent screen for a CRT
US6576383B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Nov 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2271
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an inner surface of a faceplate panel of the CRT. The luminescent screen assembly includes an organic conductive (OC) layer overcoated with an organic photoconductive (OPC) layer. Three different color-emitting phosphors are sequentially deposited over portions of the OPC layer by uniformly charging and than selectively discharging desired areas thereof. Appropriate color-emitting phosphors are then deposited on the discharged areas. The first color-emitting phosphor lines are deposited on the OPC layer by charging and then selectively discharging the OPC layer using a symmetric exposure profile. Thereafter, the OPC layer is charged again and selectively discharged to deposit the second color-emitting phosphor lines using an asymmetric exposure profile. The asymmetric exposure profile is generated using two or more lighthouse exposures that are asymmetrically positioned relative to the midpoint location of the second color-emitting phosphor lines. Thereafter, the OPC layer is again charged and selectively discharged to deposit the thi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.