Viewing screen for a display device
US6400072B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Mar 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2278
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A viewing screen (100) for a display device (115) includes a glass substrate (110) having a thermal coefficient of expansion within a range of 3.5×10−6−4.5×10−6 °C.−1. Viewing screen (100) further includes a black matrix (111), which is affixed to glass substrate (110), and which includes a black surround, a ductile metal, and lead titanate.A method for fabricating viewing screen (100) includes the steps of: adding to a black surround paste a ductile metal paste, adding to the black surround paste lead titanate particles, depositing the black surround paste on glass substrate (110), and heating the black surround paste and glass substrate (110) to affix the black surround paste to glass substrate (110), thereby forming black matrix (111). The ductile metal paste and lead titanate particles are added in amounts sufficient to realize an extent of cracking in black matrix (111) upon repeated heating to a temperature within a range of 450-600° C. that is significantly less than that exhibited by an unimproved black matrix, which is made only from the material of the black surround paste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.