Blue Phase Liquid Crystal Panel Viewing Angle Control
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Solution Overview
Problem
Liquid crystal panels face challenges in providing a transition between wide and narrow viewing angles while maintaining a thin and light design, as existing solutions with dual backlight systems increase thickness.
Innovation Solution
A blue phase liquid crystal panel with a viewing angle controlling area and a display area, utilizing first and second electrode pairs to generate electrical fields differently based on voltage thresholds, allowing for wide and narrow viewing angles without a backlight system, thereby reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual backlight system is adopted to provide transition between wide and narrow viewing angles, then the viewing angle control capability is improved, but the thickness of the liquid crystal panel increases
Solution Approach 1:
The pixel cell is divided into two functional areas: a display area for wide viewing angle mode and a viewing angle controlling area for narrow viewing angle mode. This segmentation allows different electrode configurations in different regions to achieve multiple viewing angle modes without requiring a dual backlight system, thus maintaining thin panel thickness while providing versatile viewing angle control.
Solution Approach 2:
The patent employs dynamic voltage control to switch between different operational modes. By adjusting the voltage applied to the first electrode pairs in the viewing angle controlling area, the system can dynamically transition between wide viewing angle mode (low voltage, no electrical field) and narrow viewing angle mode (high voltage, vertical electrical field), eliminating the need for physical structural changes or dual backlight systems.
2Adaptability or versatility
If a dual backlight system is used to achieve viewing angle transition, then the viewing angle adaptability is improved, but the device complexity increases
Solution Approach 1:
The single backlight system serves multiple functions by working in conjunction with the voltage-controlled electrode pairs. The same backlight structure supports both wide viewing angle mode (with horizontal electrical fields in the display area) and narrow viewing angle mode (with vertical electrical fields in the viewing angle controlling area), eliminating the need for separate dual backlight systems and reducing overall device complexity.
Solution Approach 2:
The patent replaces the mechanical/structural complexity of a dual backlight system with an electrical control mechanism. Instead of using two physical backlight systems, the invention uses voltage-controlled electrode pairs that generate electrical fields to control liquid crystal orientation, achieving viewing angle transition through electrical rather than mechanical means, thus simplifying the overall device structure.
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
Enables the transition between wide and narrow viewing angles without the need for a dual backlight system, maintaining a thin and light design by configuring the viewing angle controlling area to generate vertical and horizontal electrical fields accordingly.
Implementation Method 1
in a narrow viewing angle mode, a vertical electrical field is generated between the first pixel electrode and the first common electrode of each of the first electrode pairs within the viewing angle controlling area
Implementation Method 2
blue phase liquid crystals between the first substrate and the second substrate
Implementation Method 3
horizontal electrical fields are generated in the display area both in the wide viewing angle mode and the narrow viewing angle mode
Data Source
AI summary
A blue phase liquid crystal panel includes a plurality of pixel cells. Each of the pixel cells comprises a display area and a viewing angle controlling area. The viewing angle controlling area includes a plurality of first electrode pairs spaced apart from each other, and each of the first electrode pairs includes a first pixel electrode1 and a first common electrode. In a wide viewing angle mode, no electrical field is generated by the first electrode pair of the viewing angle controlling area. In a narrow viewing angle mode, a vertical electrical field is generated between the first pixel electrode and the first common electrode of each of the first electrode pairs within the viewing angle controlling area. In this way, the liquid crystal panel may transit between the wide viewing angle mode and the narrow viewing angle mode.