Liquid Crystal Display Panel with Double Layer Electrodes for Viewing Angle Adjustment
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Solution Overview
Problem
Existing liquid crystal display panels for portable devices lack an efficient method to switch between wide and narrow viewing angles, with existing solutions being inconvenient, increasing production costs, or requiring complex electrode drivers and high energy consumption.
Innovation Solution
A liquid crystal display panel with a double layer electrode structure on both the upper and lower substrates, allowing for symmetrical bias voltages to align liquid crystal molecules horizontally, vertically, or obliquely, enabling switching between wide and narrow viewing angles by controlling the electric field components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a double backlight system is used to switch between wide and narrow viewing angles, then the viewing angle adjustment function is achieved, but the production cost, thickness, and energy consumption increase
Solution Approach 1:
The patent combines the wide viewing angle and narrow viewing angle functions into a single backlight system by using a reflective polarizer that can be selectively activated. Instead of maintaining two separate backlight systems, the invention merges their functions into one system that can operate in different modes, thereby reducing energy consumption while maintaining the viewing angle adjustment capability
Solution Approach 2:
The patent introduces a dynamic control mechanism through the reflective polarizer that can switch between different states (activated and non-activated) to change the viewing angle. This dynamic element allows the single backlight system to adapt its performance characteristics without requiring multiple static backlight systems, thus reducing overall energy consumption
2Adaptability or versatility
If a double backlight system is used to switch between wide and narrow viewing angles, then the viewing angle adjustment function is achieved, but the production cost and thickness increase
Solution Approach 1:
The patent merges the functionality of two separate backlight systems into a single system by incorporating a reflective polarizer layer. This consolidation eliminates the need for a second alignment backlight system, thereby reducing the overall thickness of the display panel while maintaining the capability to switch between wide and narrow viewing angles
3Adaptability or versatility
If asymmetrical electrodes with multiple electrode drivers are used to switch between wide and narrow viewing angles, then the viewing angle adjustment function is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts the viewing angle control function from the complex asymmetrical electrode system with multiple drivers and implements it through a simpler mechanism involving a reflective polarizer. This extraction simplifies the electrode driver architecture while maintaining the ability to switch between different viewing angle modes
4Adaptability or versatility
If two-phase pixel technology is used to switch between wide and narrow viewing angles, then the viewing angle adjustment function is achieved, but the electric field strength is weak and the viewing angle control effect is poor
Solution Approach 1:
The patent introduces a reflective polarizer as an intermediary element that enhances the viewing angle control effect. This intermediary component works in conjunction with the electrode system to provide stronger and more reliable control over the liquid crystal molecules, thereby improving the viewing angle adjustment reliability compared to two-phase pixel technology alone
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 solution provides a stable and efficient method to adjust viewing angles, improving performance and reducing power consumption and size constraints, while maintaining a better technical effect compared to prior art.
Implementation Method 1
bias voltages, under an action of which liquid crystal molecules in the sub pixel area are aligned horizontally, vertically and obliquely, are exerted on the upper substrate electrode and the lower substrate electrode
Implementation Method 2
a polarization state of light can be changed through regulating an alignment of liquid crystal molecules
Data Source
AI summary
Disclosed are a liquid crystal display panel with adjustable viewing angle and a method for adjusting the viewing angle. A pixel unit located in a display area of the liquid crystal display panel includes a main pixel area and a sub pixel area. The main pixel area is horizontally aligned. The sub pixel area is vertically aligned. In the sub pixel area, an upper substrate electrode is arranged beneath the upper substrate and a lower substrate electrode is arranged on the lower substrate. In the sub pixel area, the upper substrate electrode and the lower substrate electrode both have a double layer electrode structure, and bias voltages, under an action of which liquid crystal molecules in the sub pixel area are aligned horizontally, vertically and obliquely, are exerted on the upper substrate electrode and the lower substrate electrode, thereby realizing switching between a narrow viewing angle mode and a wide viewing angle mode.