LCD Subpixel Electrodes with Short Protrusion for Cost Reduction
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Solution Overview
Problem
The high manufacturing cost of liquid crystal displays (LCDs) due to the cost of IC chips and the reduction in aperture ratio caused by the increased number of wires in the liquid crystal panel assembly, which affects display efficiency and quality.
Innovation Solution
The implementation of a liquid crystal display design featuring first and second substrates with a liquid crystal layer, subpixel electrodes, and a short protrusion on one substrate, which includes a conductive material, and a common electrode with inclination direction determining members, allowing for vertically aligned liquid crystal molecules with positive or negative dielectric anisotropy, and the use of a light blocking member to prevent light leakage and maintain aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If IC chips are used for the driver, then the LCD can be manufactured with standard driver integration, but the manufacturing cost increases significantly
Solution Approach 1:
The patent extracts the driver function from separate IC chips and integrates it directly into the liquid crystal panel assembly. The driver is formed as part of the panel structure using the same substrate and electrode materials, eliminating the need for separate chip mounting and reducing manufacturing cost.
Solution Approach 2:
The driver and liquid crystal panel are merged into a single integrated structure. The driver electrodes are formed on the same substrate as the liquid crystal layer, combining two previously separate components into one unified assembly, thereby reducing overall manufacturing complexity and cost.
2Adaptability or versatility
If the number of wires in the liquid crystal panel assembly is increased, then more control functions are available, but the aperture ratio is remarkably reduced
Solution Approach 1:
The patent transitions from planar wire routing to three-dimensional electrode structures. By forming electrodes with varying heights and using vertical stacking, the design achieves enhanced control functionality without increasing the horizontal wire count, thus preserving the aperture ratio.
Solution Approach 2:
The electrode structures are designed with locally optimized properties - certain regions have taller electrodes or additional conductive layers only where needed for specific control functions. This localized enhancement provides additional control capability without requiring wires across the entire panel area.
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 reduces manufacturing costs, improves response speed, increases contrast ratio, and enhances viewing angles while preventing display deterioration from external pressure, maintaining image quality and aperture ratio.
Implementation Method 1
the liquid crystal layer is vertically aligned and has positive dielectric anisotropy
Implementation Method 2
voltages are applied to the electric field generating electrodes to generate an electric field in the liquid crystal layer
Implementation Method 3
alignment of the liquid crystal molecules may be controlled to effect polarization of incident light passing therethrough
Data Source
AI summary
A liquid crystal display includes; first and second substrates facing each other, a liquid crystal layer interposed between the first and second substrates and including liquid crystal molecules, a first subpixel electrode disposed on the first substrate, the first subpixel electrode receiving a first data voltage, a second subpixel electrode disposed on the first substrate, the second subpixel electrode receiving a second data voltage; and a short protrusion disposed on the second substrate and simultaneously facing the first and second subpixel electrodes, wherein the liquid crystal layer is vertically aligned and has positive dielectric anisotropy.