Corner Phase Compensation for Curved Display Light Leakage
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Solution Overview
Problem
Curved liquid crystal display panels experience light leakage at corner portions due to birefringence caused by stress, with existing solutions either deteriorating display quality or restricting design by placing optical compensation layers at central portions or reducing curvature, respectively.
Innovation Solution
A phase compensation member, comprising a first phase compensation layer with birefringence characteristics, is strategically placed at corner portions of the curved display screen to reduce phase differences caused by stress, formed by emitting polarized UV light onto a polymeric membrane, which also functions as an isotropic layer at central portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an optical compensation layer is arranged on the entire display screen to cancel phase difference due to birefringence, then light leakage at corner portions is reduced, but display quality at the central portion deteriorates
Solution Approach 1:
The patent applies local quality by placing phase compensation members only at corner portions of the liquid crystal panel where birefringence occurs due to curving stress, rather than covering the entire display screen. This localized approach compensates for phase differences at stress-concentrated corner areas without introducing unnecessary optical layers at the central portion, thereby preventing display quality deterioration while effectively reducing light leakage at corners.
2Object-affected harmful factors
If the degree of curving is reduced solely on the corner portion of the liquid crystal panel to reduce birefringence, then light leakage is reduced, but design flexibility of the liquid crystal panel is restricted
Solution Approach 1:
The patent segments the compensation approach by applying phase compensation members only to corner portions of the liquid crystal panel rather than modifying the entire panel's curving design. This segmentation allows the central and edge portions to maintain their intended curving degrees for design flexibility, while corner-specific compensation addresses light leakage issues without constraining overall panel design options.
3Object-affected harmful factors
If a phase compensation member is provided at each corner portion to reduce phase difference, then light leakage is minimized without affecting central portion display quality, but device complexity increases
Solution Approach 1:
The patent uses local quality by implementing phase compensation members only at corner portions where birefringence occurs, avoiding unnecessary components at the central portion. This localized compensation approach minimizes light leakage at corners while maintaining simple configuration and good display quality at the central area, thus not significantly increasing overall device complexity.
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
This configuration effectively minimizes light leakage at corner portions during black display, maintaining image quality across the entire screen without altering the curvature design, and simplifies the display device configuration by utilizing existing components.
Implementation Method 1
birefringence occurs at an end portion of a substrate of the liquid crystal panel due to the stress generated at the time of curving
Implementation Method 2
birefringence occurs at an end portion of a substrate of the liquid crystal panel due to the stress generated
Implementation Method 3
formed by emitting polarized UV light onto a polymeric membrane
Data Source
AI summary
A display device according to one aspect of the present invention includes a liquid crystal panel including a curved display screen, and a phase compensation member provided at a position corresponding to each of corner portions of the curved display screen.