Optical Film Microstructures for Curved Display Luminance Uniformity
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Solution Overview
Problem
Curved thin film transistor liquid crystal display (CTFT-LCD) devices face challenges in maintaining uniform luminance and saturation due to their curved shape, which affects viewing quality.
Innovation Solution
A display device comprising a flexible display panel, a light module, and an optical film with specific microstructures and angles between axes, which improves luminance and saturation uniformity by optimizing the angle of full width at half maximum (FWHM) across different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a curved display panel is used to improve viewing quality, then the distances between the viewer and different areas of the screen are approximately the same, but the uniformity of luminance and saturation is worsened
Solution Approach 1:
The patent applies local quality by introducing an optical film with spatially varying microstructures (different shapes, sizes, and orientations at different locations) to compensate for the non-uniform optical properties caused by the curved display panel. Each local region of the optical film is designed with specific characteristics to correct the luminance and saturation uniformity in that particular area.
Solution Approach 2:
The patent changes physical parameters of the optical film, including the shape, size, orientation, and distribution density of microstructures, to optimize the viewing characteristics. By adjusting these parameters, the optical film compensates for the curvature-induced non-uniformity in luminance and saturation across different viewing angles.
2Ease of operation
If the optical film has microstructures extending along an axis perpendicular to the curvature axis, then the viewing angle is improved, but the alignment and manufacturing precision becomes more difficult
Solution Approach 1:
The patent introduces asymmetric microstructure designs where the orientation and shape of microstructures vary according to their position relative to the curvature axis. This asymmetric configuration optimizes the viewing angle in specific directions while providing clear alignment references that facilitate manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the uniformity of luminance and saturation, improving the viewing experience by ensuring that the angle of full width at half maximum is greater than 140 degrees in certain directions and less than 100 degrees in others, with differences exceeding 50 degrees, thereby addressing the issues of non-uniformity in curved displays.
Implementation Method 1
The optical film is located between the flexible display panel and the light module. The optical film comprises a substrate and a plurality of first strip microstructures. The first strip microstructures extend along a second axis.
Data Source
AI summary
A display device includes a flexible display panel, a light module and an optical film. The flexible display panel has a first axis and curving about the first axis as an axis of curvature. The light module is located on one side of the flexible display panel. The optical film is located between the flexible display panel and the light module. The optical film includes a substrate and multiple first strip microstructures. The substrate has a first side and a second side that are opposite to each other. The first side faces the light module while the second side faces the flexible display panel. The first strip microstructures are located on the first side of the substrate, and the first strip microstructures extend along a second axis.