LCD Viewing Angle and Speed via Symmetric Storage Electrode
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Solution Overview
Problem
Liquid crystal display (LCD) apparatuses suffer from a narrowed viewing angle due to their anisotropic refractive index, which also results in reduced operating speed when techniques to widen the viewing angle compromise the speed.
Innovation Solution
The LCD apparatus features a design with an upper and lower substrate, a liquid crystal layer, a storage capacitor, and pixel electrodes with angled surfaces, where the second storage electrode is arranged symmetrically and extends parallel to the directors, influencing the alignment of liquid crystals to improve viewing angle and operation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If techniques are applied to widen the viewing angle, then the viewing angle is improved, but the operating speed is reduced
Solution Approach 1:
The patent applies different alignment configurations to different regions of the liquid crystal layer. Specifically, it uses a combination of vertical alignment and tilted alignment in different areas, allowing each region to contribute differently to the overall performance. This local differentiation enables wide viewing angle without compromising operating speed uniformly across the entire display.
Solution Approach 2:
The patent introduces asymmetric alignment configurations where the liquid crystal molecules are oriented at different angles in different regions. The use of tilted alignment in specific areas creates an asymmetric structure that optimizes both viewing angle and response time, resolving the contradiction between these two parameters.
2Adaptability or versatility
If liquid crystal alignment is optimized for viewing angle, then viewing angle is improved, but image clarity is reduced due to texturing
Solution Approach 1:
The patent divides the liquid crystal alignment into multiple segments or regions with different orientation characteristics. By segmenting the alignment configuration, it prevents uniform tilting that causes texturing, while still achieving wide viewing angle. The segmented approach allows certain regions to maintain vertical alignment for clarity while others provide tilted alignment for viewing angle.
Solution Approach 2:
Different regions of the liquid crystal layer are given different alignment qualities - some regions maintain vertical alignment for image clarity while others have tilted alignment for viewing angle expansion. This local quality differentiation eliminates texturing effects while preserving both viewing angle and image quality.
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 design enhances the viewing angle and operational speed of the LCD apparatus by aligning liquid crystals efficiently, preventing texturing and allowing quicker alignment, thus improving image clarity and display performance.
Implementation Method 1
Since the liquid crystals have an anisotropic dielectric constant, the alignment of the liquid crystals is changed when an electric field is applied to the liquid crystals
Implementation Method 2
The LCD apparatus applies an electric field between the two substrates such that the liquid crystals have a light transmittance corresponding to display information
Implementation Method 3
since the liquid crystals have an anisotropic refractive index, light transmittance of the LCD apparatus may vary according to the alignment of the liquid crystals
Data Source
AI summary
A liquid crystal display (LCD) apparatus includes an upper substrate having an upper director, a lower substrate having a lower director, and a liquid crystal layer interposed between the upper substrate and the lower substrate. The upper director and the lower director aligning liquid crystals included in a liquid crystal layer to widen a viewing angle of the LCD apparatus. A storage electrode having a shape corresponding to the upper director and the lower director is arranged on the lower substrate so that the liquid crystals are rapidly aligned in a predetermined angle to increase an operating speed of the LCD apparatus.