Horizontal Electric Field LCD Viewing Field Adjustment
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Solution Overview
Problem
Horizontal electric field type liquid crystal display devices in in-plane switching or fringe field switching modes cannot electronically adjust the effective display viewing field due to a fixed gamma characteristic of 2.2, limiting privacy and viewing angle flexibility.
Innovation Solution
Incorporating a third electrode opposite the substrate, with a liquid crystal layer sandwiched between the substrate and this electrode, allowing for the generation of an electric field perpendicular to the substrate, which changes the orientation of liquid crystal molecules to alter the effective display viewing field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a horizontal electric field type liquid crystal display device uses in-plane switching or fringe field switching mode, then the gamma characteristic remains at an ideal value of 2.2, but it cannot electronically adjust the effective display viewing field
Solution Approach 1:
The electrode structure is segmented into three distinct electrodes: a first electrode and a second electrode on the substrate, and a third electrode on the counter substrate. This segmentation allows independent control of horizontal and vertical electric field components, enabling electronic adjustment of the viewing field while maintaining the beneficial gamma characteristic of horizontal electric field type devices.
Solution Approach 2:
The invention transitions from a conventional two-electrode horizontal electric field configuration to a three-electrode configuration that introduces a vertical electric field dimension. The third electrode enables generation of an electric field component perpendicular to the substrate, adding a new dimension of control that allows electronic adjustment of the effective display viewing field while preserving the horizontal switching mechanism.
2Adaptability or versatility
If the orientation of liquid crystal molecules is changed in the perpendicular direction to alter the effective display viewing field, then the viewing field characteristics worsen, but the effective display viewing field can be adjusted
Solution Approach 1:
The invention applies local quality by creating different electric field orientations in different regions of the liquid crystal layer. The horizontal electric field component (from first and second electrodes) maintains ideal gamma characteristics, while the vertical electric field component (from third electrode) locally adjusts molecule orientation to control viewing field. This localized control allows viewing field adjustment while preserving optimal display characteristics in the horizontal plane.
Solution Approach 2:
The invention implements dynamic control of liquid crystal molecule orientation by independently adjusting the voltage applied to the third electrode relative to the substrate. This dynamic adjustment capability allows real-time electronic modification of the effective display viewing field characteristics without fixed mechanical structures, enabling adaptable privacy and viewing angle control.
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 enables adjustment of the viewing field by changing the orientation of liquid crystal molecules, narrowing the viewing field characteristics and enhancing privacy by restricting views from angles other than directly in front.
Implementation Method 1
The first electrode and the third electrode can generate an electric field having a direction along a plane perpendicular to the substrate in the liquid crystal layer
Implementation Method 2
Each pixel includes a first electrode and a second electrode respectively disposed on upper and lower surfaces of a substrate so as to change the orientation of liquid crystal molecules within a plane parallel to the substrate
Data Source
AI summary
The invention discloses a horizontal electric field type liquid crystal display device having a plurality of pixels. Each pixel includes first and second electrodes disposed correspondingly on upper and lower surfaces of the substrate so as to change the orientation of liquid crystal molecules in the plane parallel to the substrate. Each pixel has a third electrode opposite the substrate. A liquid crystal layer containing liquid crystal molecules is sandwiched between the substrate and the third electrode. The first electrode and the third electrode can generate an electric field in the direction perpendicular to the substrate in the liquid crystal layer.