Liquid Crystal Display Panel Auxiliary Electrode Viewing Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current liquid crystal display panels lack integrated privacy measures that can switch between wide and narrow viewing angle modes effectively, leading to potential information leakage due to their design limitations.
Innovation Solution
A liquid crystal display panel design where first auxiliary electrodes are not overlapping with first pixel electrodes, allowing for increased front-viewing-angle transmittance in narrow viewing angle mode and improved display contrast, achieved by controlling voltage differences between auxiliary and common electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a privacy filter or additional viewing angle control module is mounted onto the display, then privacy protection is improved, but device complexity increases
Solution Approach 1:
The patent integrates the viewing angle control function directly into the display panel structure by incorporating auxiliary electrodes into the existing pixel electrode arrangement. This merging of functions eliminates the need for separate privacy filters or additional viewing angle control modules, thereby reducing device complexity while maintaining privacy protection capability
Solution Approach 2:
The display panel is designed with auxiliary electrodes that enable multi-functionality: the same electrode structure serves both as pixel electrodes for normal display operation and as viewing angle control elements when specific voltage patterns are applied. This universal design allows the display to switch between wide viewing angle mode and narrow viewing angle mode without requiring separate dedicated components
2Adaptability or versatility
If auxiliary electrodes are positioned to overlap pixel electrodes, then viewing angle control is improved, but front-viewing-angle transmittance decreases
Solution Approach 1:
The patent applies local quality by positioning auxiliary electrodes in specific locations that do not overlap with pixel electrodes in the front viewing direction. The auxiliary electrodes are arranged to exert their viewing angle control effect primarily in oblique viewing directions, while maintaining high transmittance in the front viewing angle region. This localized electrode placement strategy achieves viewing angle control without sacrificing front-viewing brightness
3Adaptability or versatility
If a privacy filter is mounted onto the display, then viewing angle restriction is improved, but display contrast deteriorates
Solution Approach 1:
The patent implements dynamic viewing angle control through the auxiliary electrodes that can be selectively activated. Unlike static privacy filters that permanently restrict viewing angles, the auxiliary electrode system can dynamically adjust the viewing angle characteristics based on operational requirements, switching between wide and narrow viewing angle modes while maintaining optimal display contrast in each mode
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
Enhances front-viewing-angle transmittance and display contrast in narrow viewing angle mode while maintaining viewing angle control and touch detection functionality, addressing the need for adjustable privacy settings.
Implementation Method 1
a liquid crystal display panel, comprising a first substrate, a second substrate, a plurality of first pixel electrodes, a plurality of second pixel electrodes, a plurality of common electrodes, a plurality of first auxiliary electrodes, and a liquid crystal layer
Implementation Method 2
in a wide viewing angle mode, providing a first voltage difference between the first auxiliary electrodes and the common electrodes; and in a narrow viewing angle mode, providing a second voltage difference between the first auxiliary electrodes and the common electrodes
Data Source
AI summary
A liquid crystal display panel includes first and second substrates, first pixel electrodes, second pixel electrodes, common electrodes, first auxiliary electrodes, and a liquid crystal layer. The second substrate is disposed opposite to the first substrate. The liquid crystal layer is disposed between the first and the second substrates. The first pixel electrodes, the second pixel electrodes, and the common electrodes are disposed on the first substrate. The first auxiliary electrodes are disposed on the second substrate. One of the first pixel electrodes is not overlapping one of the first auxiliary electrodes in a vertical projection direction and overlapping one of the common electrodes in the vertical projection direction. A driving method of the liquid crystal display panel includes setting a first voltage difference in a wide viewing mode and a second voltage difference in a narrow viewing mode between the first auxiliary electrodes and the common electrodes.