FFS LCD Viewing Angle Control via Independent Pixels
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices with wide-viewing angles require specific panel structures, increasing manufacturing costs and failing to provide confidentiality on demand, as they cannot control viewing angles effectively in both vertical and horizontal directions without forming a specific liquid crystal display panel.
Innovation Solution
A Fringe Field Switching (FFS) mode LCD device with viewing-angle control pixels that incline liquid crystal molecules vertically or horizontally, using a separate viewing-angle control signal and driver, and a viewing-angle control voltage adjuster to synchronize the signal with common voltage, allowing for independent control of viewing angles without a specific panel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a scattering-unscattering switching layer is used to achieve wide viewing angle, then visibility from side directions is improved, but manufacturing costs increase due to specific panel structure requirements
Solution Approach 1:
The patent applies dynamic control of liquid crystal molecule orientation by applying different voltages to control pixels. The liquid crystal molecules can be switched between different alignment states (vertical, horizontal, or intermediate angles) by controlling the voltage applied to the control electrode, enabling dynamic viewing angle adjustment without changing the physical panel structure.
Solution Approach 2:
The patent changes the electrical parameter (voltage) applied to the liquid crystal layer to control the viewing angle. By varying the voltage magnitude and polarity between the common electrode and control electrode, the liquid crystal molecules reorient to different angles,实现对观看角度的精确控制，而无需改变面板的物理结构。
2Ease of operation
If FFS mode with specific common electrode shape is used to improve visibility in specific direction, then viewing angle control is achieved, but confidentiality in vertical and horizontal directions cannot be ensured
Solution Approach 1:
The patent uses dynamic voltage control to switch liquid crystal molecule orientation between different states. By applying specific voltages, the molecules can be oriented to provide confidentiality in vertical and horizontal directions while maintaining front-direction visibility, achieving dynamic security control without fixed structural limitations.
Solution Approach 2:
The patent introduces a separate control pixel structure with control electrodes that can independently control the liquid crystal orientation in specific regions. This local control capability allows different viewing angles to be controlled in different areas of the display, enabling selective confidentiality control for different directions.
3Ease of operation
If voltage is applied to FFS mode LCD to incline liquid crystal molecules, then visibility in specific direction is improved, but blurring images occur
Solution Approach 1:
The patent employs dynamic voltage control with precise timing to switch liquid crystal molecules between different alignment states. By carefully controlling the voltage application duration and magnitude, the molecules transition smoothly between states without causing image blur, maintaining image quality while achieving viewing angle control.
Solution Approach 2:
The patent uses periodic voltage application patterns to control the liquid crystal molecules. By applying voltages in specific cycles and patterns, the molecules are switched between different orientations in a controlled manner, preventing blur while achieving the desired viewing angle effects.
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 control of viewing angles in both vertical and horizontal directions, providing confidentiality of displayed information while maintaining front-direction visibility, reducing manufacturing costs by eliminating the need for a specific panel structure and preventing blurring images.
Implementation Method 1
A Fringe Field Switching (FFS) mode LCD device with viewing-angle control pixels that incline liquid crystal molecules vertically or horizontally
Data Source
AI summary
A liquid crystal display device is disclosed, which can control a viewing angle in vertical and horizontal directions without forming a specific liquid crystal display panel, the liquid crystal display device comprising a display screen including a plurality of color pixels and liquid crystal molecules; and a viewing-angle control pixel controlling the liquid crystal molecules, an alignment direction of the liquid crystal molecules being inclined to a vertical or horizontal direction in the display screen, wherein the viewing-angle control pixel is formed independently of RGB pixels, to thereby control the viewing angle in the horizontal and vertical directions.