LCD Array Substrate Astigmatism Layer for Wider Viewing Angles
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Solution Overview
Problem
Conventional LCD panels with vertical alignment (VA) designs suffer from poor viewing angles due to the planar structure of pixel electrodes, which leads to reduced brightness and light transmittance when attempting to improve viewing angles through multi-domain designs.
Innovation Solution
An array substrate with a pixel electrode layer and an astigmatism layer, where the astigmatism layer is made of a transparent material and has a light-emitting surface area greater than the electrode surface area, refracting light to enhance viewing angles without sacrificing brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-domain design is adopted to improve viewing angles, then viewing angles are improved, but brightness and light transmittance are reduced
Solution Approach 1:
The patent applies curvature to the pixel electrode surface by forming a convex or concave curved surface structure. This curved surface modifies the light emission pattern and viewing characteristics without requiring multiple electrode domains, thereby improving viewing angles while preserving brightness and light transmittance.
Solution Approach 2:
The patent transitions from a planar two-dimensional electrode structure to a three-dimensional curved surface structure. By adding the dimensional aspect of surface curvature, the patent achieves improved viewing angles through spatial light distribution control rather than through multi-domain electrode segmentation.
2Adaptability or versatility
If an eight-domain design is adopted to improve viewing angles, then viewing angles are improved, but light transmittance of grayscales is reduced
Solution Approach 1:
The curved surface structure of the pixel electrode controls light emission in a manner that improves viewing angles without requiring complex multi-domain segmentation. This single-structure approach maintains better light transmittance compared to eight-domain designs by avoiding the light blocking effects of multiple electrode divisions.
Solution Approach 2:
The patent applies a uniform curved surface structure across the pixel electrode that locally modifies light emission characteristics. This localized curvature modification achieves the desired viewing angle improvement while preserving overall light transmittance, unlike multi-domain designs that create heterogeneous light distribution patterns.
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 increases light-emitting and viewing angles by refracting light at the astigmatism layer, providing a better viewing experience without reducing brightness or light transmittance, addressing the limitations of conventional VA-LCD panel designs.
Implementation Method 1
By forming the astigmatism layer on the pixel electrodes... light emitted from a backlight module will be refracted at light-emitting surface of the astigmatism layer after the LCD panel is formed. As a result, light-emitting angles and viewing angles are increased.
Data Source
AI summary
The disclosure provides an array substrate, a manufacturing method thereof, and a liquid crystal display (LCD) panel. The array substrate includes a substrate, a driving circuit layer, a pixel electrode layer, and an astigmatism layer, which are stacked. The pixel electrode layer includes a plurality of pixel electrodes which are independent from each other. The astigmatism layer includes a plurality of astigmatism components which are connected to each other and correspond to the pixel electrodes. An area of a light-emitting surface of the astigmatism components away from the pixel electrodes is greater than an area of an electrode surface of the pixel electrodes away from the substrate. The disclosure improves viewing angles.