xanthene pigment, coloring composition containing the pigment, coloring agent for color filters, and color filters
A xanthene dye with enhanced solubility and coloring power addresses the solubility and durability issues of conventional dyes, improving the performance of color filters in display devices.
JP2026104991APending Publication Date: 2026-06-25HODOGAYA CHEMICAL CO LTD
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Patent Information
- Application Number
- JP2026067977
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2021-02-26
- Filing Date
- 2026-04-16
- Publication Date
- 2026-06-25
AI Technical Summary
Technical Problem
Conventional xanthene dyes used in color filters suffer from low solubility and coloring power, leading to decreased transmittance and contrast due to light scattering and interference, while dyes are less robust than pigments, affecting the durability of color filters.
Method used
A xanthene dye represented by a specific general formula with varying substituents and alkylene groups, ensuring high solubility and coloring power, formulated into a coloring composition for color filters.
Benefits of technology
The xanthene dye exhibits excellent solubility and coloring ability, enhancing the performance of color filters by improving transmittance and robustness, suitable for high-brightness and long-term stability in display devices.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a xanthene dye excellent in solubility and coloring power for a coating film. To provide a coloring composition containing the dye, a colorant for a color filter, and a color filter. 【Solution means】 A xanthene dye represented by the following general formula (1). TIFF2026104991000040.tif33165 [In the formula, R 1 ~R 4 each independently represents H, an alkyl group, or an aromatic hydrocarbon group, and at least one of R 1 , R 2 contains an alkylene group, and a group having an amino group or an ammonium group at the terminal of R 1 or R 2 . R 5 , R 6 each independently represents H, a halogen atom, an alkyl group, or an aromatic hydrocarbon group. R 7 represents -SO3 - , -CO2 - , a sulfonyl group, a sulfonamide group, a carbonyl group, an amide group, etc., and R 7 may contain a cation. n represents an integer from 0 to 5. An represents an anion, x represents an integer from 1 to 3, and y represents an integer from 0 to 6. ]
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