Low-Retardation Films That Break Optical Limitations
Low Phase Retardation Transparent PI Film is a type of polyimide (PI) film, specifically developed as a colorless, transparent film for Under-Display Camera (UDC) and touch display module applications.
The Low Phase Retardation Transparent PI Film developed by Microcosm Technology is specifically designed for advanced display applications. It offers excellent optical performance, ultra-low retardation, high transparency, and stable color properties. Its superior film characteristics effectively minimize viewing-angle color shift, enhancing image purity.
This material is ideal for high-precision electronic products, such as Under-Display Cameras (UDC), touch display modules, and foldable smartphone display.
Common Challenges and Limitations
In a market striving for higher screen transparency, thinner device designs, and more natural visual experiences, traditional optical films can no longer meet the demands of precision displays. Issues such as viewing-angle color shift and unstable chromaticity have become key challenges.
Due to excessive phase difference, traditional films suffer from severe viewing-angle color shift, leading to noticeable color distortion. Microcosm’s low-phase-difference transparent film effectively overcomes these limitations and corrects these issues.
Product Advantages
| Feature | Discription | Product Values |
|---|---|---|
| Ultra-low phase retardation (<10 / <50 nm） | Phase retardation controlled within 10–50 nm | Minimizes optical interference and color shift, delivering more natural and stable images for UDC and displays |
| High transparency (Approx. 90%) | Total light transmittance up to 90.1% | Improves image clarity and enhances UDC imaging performance |
| Multiple thickness options (13 / 25 μm） | Flexible structural design options | Compatible with various display module designs, improving material integration |
| designed for premium display technologies | Optimized for UDC and touch display modules | Enables next-generation full-screen device development and strengthens product competitiveness |
Why Choose Us?
See the Product Comparison
| Performance Metric | Microcosm- Low Phase Retardation Transparent PI Film | General High Phase Retardation PI Film |
|---|---|---|
| Front-view display quality | Deep blacks and clean image reproduction | Blacks appear grayish and hazy |
| Side-view performance | Consistent black levels with no noticeable color shift | Color shift and graying at oblique angles |
| Phase retardation | <10–50 nm（industry-leading level） | High phase retardation → prone to optical interference |
| Transparency | Approx. 90% | Approx. 80–85%, reduced imaging quality |
| Color stability | Highly stable | Noticeable color deviation |
| Application scope | Premium displays, UDC, touch modules | General electronic devices |
The Optimal Solution
Low Phase Retardation Transparent PI Film outperform general PI in transparency, optical stability, and off-axis viewing performance, making them especially suitable for premium display applications and UDC designs that demand exceptional image quality.
Product Application Scenario
Under-Display Camera (UDC) Smartphones
Enhances camera light transmission and improves viewing-angle color shift issues
Foldable Display Protective Layers
Low retardation ensures stable visual performance even after repeated folding
Transparent Touch Modules
Reduces glare and haze while enhancing brightness and touch responsiveness
