Yellow colorant, coloring composition, color filter, sensor using the same, and method for producing yellow colorant
A yellow colorant with a specific pigment formula, processed to achieve a pH of 6.0 to 7.0, addresses the issues of viscosity and transmittance in conventional colorants, offering high coloring power and stability for improved color filters and sensors.
Patent Information
- Application Number
- JP2021078302
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-05-06
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2041-05-06
AI Technical Summary
Conventional colorants like C.I. Pigment Yellow 139 face issues with increased viscosity when concentrated, leading to unsatisfactory coloring power and decreased transmittance, and they do not meet the demands for thinning and improved color separation in color filters for image sensors.
A yellow colorant containing a pigment represented by a specific chemical formula, processed through boiling in distilled water and filtration to achieve a pH of 6.0 to 7.0, with a content ratio of 80% to 100% by mass, and combined with a binder resin and solvent, along with optional additives for stability and improved properties.
The solution provides a yellow colorant with high coloring power and transmittance, ensuring stability when mixed with other compositions, and enhances the performance of color filters and sensors.