Plastic film for optical use, optical laminate using same, polarizing plate, and image display device
By reducing the in-plane phase difference on the plastic film and controlling the slow-axis angle deviation, the rainbow spots and black screen problems in the polarization element and stretched plastic film are solved, achieving higher operability and yield.
CN120315080APending Publication Date: 2025-07-15DAI NIPPON PRINTING CO LTD
3 Cites 0 Cited by
Patent Information
- Application Number
- CN202510484321.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2020-03-31
- Filing Date
- 2021-03-30
- Publication Date
- 2025-07-15
AI Technical Summary
Technical Problem
In the prior art, when configuring polarization elements and stretched plastic films, rainbow spots and black screens are prone to occur, and the operability is poor, making it difficult to improve the yield rate.
Method used
By reducing the in-plane phase difference on the plastic film and uniformizing the angle of the slow axis, ensuring that the standard deviation of the slow axis angle σ reaches above the specified value, and meeting specific conditions to suppress rainbow spots and black screens.
Benefits of technology
Without increasing the in-plane phase difference, the rainbow spots during naked eyes and the black screen during observation with polarized sunglasses are effectively suppressed, thereby improving operability and yield.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application relates to a plastic film for optical use, and an optical laminate, a polarizing plate, and an image display device using the same. Provided is an optical plastic film capable of suppressing rainbow spots during observation with naked eyes and black screens during observation with polarized sunglasses without increasing in-plane phase differences and without requiring axial alignment.
Need to check novelty before this filing date? Find Prior Art