Filters for electronic display device
US6818262B2 · kind B2 · utility
0Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides filters for an electronic display device comprising a squarylium compound represented by the general formula (I): wherein X represents a nitrogen atom or an oxygen atom; Q represents a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom; and R1, R2, R3, R4, R5, R6 and m are as defined in the specification. The filters for an electronic display device of the present invention can selectively shield the light having such a wavelength that reduces the color purity, and thereby can provide clear images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.