High-Quality Color Resist for Next-Generation Displays
Color Resist
As display image quality continues to advance, a key material for accurately reproducing colors is color resist for displays. It plays a crucial role in forming fine red, green, and blue (RGB) patterns across various technologies, such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs), and has a significant impact on brightness, contrast, and color reproducibility.
DNP Fine Chemicals provides high-quality color resist products and strong technical capabilities to meet these demands.
What is Color Resist for Displays?
Color resist for displays is a photosensitive material containing red, green, and blue coloration used to form color filters in LCDs and OLED displays.
Through photolithography technology, fine RGB patterns are created to accurately separate light from backlights or emission layers, enabling the reproduction of the colors required for display images. Because color resist with uniform pigment dispersion directly affects image quality factors such as chromaticity, transmittance, and contrast, high optical performance is required.
In addition, display manufacturing processes involve high-temperature treatment and light exposure, making it necessary to design materials with excellent heat resistance and light resistance that are less prone to color degradation even after long-term use. In this way, color resist is an essential material that supports both color performance and durability in displays.
Blue Color Resist
In 2015, we developed a dye-based blue color resist that combines high brightness, high transmittance, and high heat resistance, replacing the conventionally dominant pigment-based blue color resist. This achievement enabled superior color reproducibility and optical performance, establishing material technologies that contribute to enhanced display performance.
Low-Temperature Curable Color Resist
OLED Panels with Polarizers
Panels Applying Low-Temperature Curable Resist
Applying Color Resist Instead of Polarizers
We have developed a low-temperature curing color resist that is essential for the Color Filter on Encapsulation (CoE) technology used in OLED displays. By combining our proprietary resin synthesis technology with photolithography technology, we have achieved color filter formation suitable for low-temperature processes.
In particular, this technology is expected to be applied to next-generation flexible displays that can be bent or rolled, and it significantly contributes to greater freedom in device design.
Main Applications of Color Resist
Color resist is an essential functional material used to form color filters indispensable for color display in LCDs, and it is also applied to OLEDs utilizing COE technology.
By accurately reproducing the color characteristics of each of the RGB colors and precisely controlling light transmission and absorption, color resist has a major influence on display image quality.
In recent years in particular, higher brightness, higher contrast, and wider color gamut have been increasingly demanded. To meet these requirements, higher performance and greater reliability of color resist have become ever more important. As a fundamental technology supporting high-definition visual expression, its use is expanding across a wide range of display applications.
DNP Fine Chemicals’ Color Resist
DNP Fine Chemicals’ color resist supports a wide range of display sizes, from small and medium panels to large panels, and is highly regarded for its high quality and reliability across diverse applications, including mobile devices, monitors, televisions, automotive displays, and medical displays. It has been adopted by many overseas manufacturers, building a strong global track record.
In addition, our color resist has been widely adopted in high-definition display fields such as AR/VR applications, offering performance that meets the demands of advanced display devices. Particularly in the latest displays requiring high brightness, high contrast, wide color gamut, and high resolution, our color resist is highly regarded as an optimal solution.
High-Quality Color Resist Leveraging Four Core Technologies
By integrating four core technologies—pigment dispersion, resin synthesis technology, resist and ink formulation technology, and evaluation and analysis technology—we develop and manufacture high-quality color resist optimized for each customer’s operating environment and manufacturing process.
Through the combination of these technologies, we provide material solutions that meet a wide range of display performance requirements at a high level, including color reproducibility, durability, and processability.
Meeting Diverse Color Material Needs in Line with Trends
In line with the latest display trends and the performance requirements demanded by the market, we can propose color resist that meets a wide range of needs—such as high brightness, high contrast, and wide color gamut—by combining various color materials in an optimal balance.
Through careful selection of color materials and formulation design, properties such as color performance and transmittance can be finely adjusted, enabling optimal material design tailored to specific applications and device specifications.
Proprietary Original Color Materials (Blue Color Resist)
With our proprietary, originally developed blue color materials, we have overcome the heat resistance limitations that were traditionally considered a weakness of dye-based color materials.
As a result, we have enabled the mass production of blue color resist that achieves outstandingly high brightness by combining unprecedented color performance with excellent light transmittance.
Offering reliability that withstands high-temperature processes together with superior optical properties, this material is highly regarded as a key contributor to improved image quality in next-generation displays.
Core Technologies for Color Resist Development and Manufacturing
Precision Dispersion Technology
To achieve the high contrast performance required for displays, we are advancing the development of dispersion processes and molecular design that maximize the characteristics of each color material. As a result, we have realized the mass production of pigment dispersion with fine and uniform particle size distribution, and have established a stable supply system for high-quality color resist with excellent color performance, transmittance, and durability.
Resin Synthesis Technology
Resins used in color resist are required to provide a wide range of functions, including curability, developability, and adhesion.
We develop these resins in-house and have established a system that enables their mass production with optimally tailored functionalities.
Leveraging our proprietary material design capabilities and rapid development speed, we respond flexibly and swiftly to advanced requirements, achieving short lead times for mass production ramp-up and effective problem-solving.
Resist and Ink Formulation Technology
Color resist is composed of numerous raw materials, forming a complex material system in which these components interact with one another. Our advanced resist and ink formulation technology precisely accounts for these interactions, enabling us to provide color resist products optimized for each customer’s usage environment and process conditions. This strong formulation capability—allowing flexible responses to complex performance requirements—supports the development of high-performance, highly reliable materials.
Frequently Asked Questions About Color Resist Development and Manufacturing
Q. How Are Durability and Reliability Ensured?
A. Through dispersion stabilization technology for pigments and dyes, as well as ink formulation technology, including resin synthesis technology, we maintain stable performance even in long-term usage environments. In particular, enhanced heat resistance ensures that color reproducibility is preserved even under high-temperature conditions.
Q. Is Prototyping and Evaluation Possible When Considering Outsourced Development?
A. Yes. We can provide support for prototyping and evaluation from the early stages of development. We propose optimal formulations and processes tailored to each customer’s display specifications.
Q. Is Mass Production Supported?
A. We have extensive mass production experience both in Japan and overseas and have established a stable supply system. We provide consistent support from product launch through to the mass production stage.
Q. Are Custom-Specification Color Resist Products Available?
A. Yes. We can provide custom development tailored to specific optical properties, process conditions, and applications (such as flexible displays, wide color gamut compatibility, and automotive applications), according to customer requirements.
By combining material design, formulation technology, and dispersion processes, we deliver optimal color resist solutions tailored to each customer.
Leave Color Resist Development and Manufacturing to DNP Fine Chemicals
One of the strengths of our color resist is its ability to express a wide range of colors tailored to customer requirements. As a high-quality and easy-to-handle material, it can be used across a broad range of applications. We invite you to consider our color resist.
Please note that inquiries from individual customers cannot be accepted. Thank you for your understanding.
