Liquid Crystal Display Delta Pixel Inversion Control
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Solution Overview
Problem
Liquid crystal display devices using dot inversion driving methods experience power consumption issues and visually recognizable stripe patterns, especially in delta pixel arrays, which affect image quality and visibility.
Innovation Solution
A liquid crystal display device with a delta pixel array that employs a system of inversion control signal lines and selectors to manage the polarity and phase of video signals, ensuring that pixel polarities are irregularly arrayed and not regularly inverted, thereby preventing stripe patterns and optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If dot inversion driving is applied to reduce power consumption, then power consumption is reduced, but stripe patterns are visually recognized
Solution Approach 1:
The patent applies asymmetry by using different inversion cycles for different pixel groups. Specifically, pixels in different regions are inverted at different cycles (e.g., some pixels inverted every 1 frame, others every 2 frames, others every 3 frames), breaking the regular symmetry that causes stripe patterns. This asymmetric inversion pattern eliminates the periodic visual artifacts while preserving the power consumption benefits of dot inversion driving.
Solution Approach 2:
The patent implements dynamics by making the inversion cycle variable across different pixel groups rather than uniform. The inversion control unit dynamically assigns different inversion cycles to different regions based on the display content and pixel position, allowing the system to adaptively prevent stripe patterns while optimizing power consumption for each region.
2Use of energy by stationary object
If regular inversion cycling is used in dot inversion driving, then power consumption is reduced, but stripe patterns occur due to regular polarity arrangement
Solution Approach 1:
The patent introduces asymmetry in the polarity arrangement by assigning different inversion cycles to different pixel groups. This creates an irregular polarity distribution pattern that prevents the formation of regular stripe patterns while maintaining the low power consumption characteristics of dot inversion driving.
Solution Approach 2:
The patent applies local quality by allowing different regions of the display to have different inversion characteristics. Each pixel group can be inverted at its optimal cycle based on local requirements, creating spatial variation in the polarity arrangement that eliminates global stripe patterns while maintaining local optimization for power consumption.
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
The solution effectively eliminates the visually recognizable stripe patterns and reduces power consumption by ensuring irregular polarity arrangements, enhancing image quality and efficiency in liquid crystal display devices.
Implementation Method 1
The liquid crystal display device changes an electric field to change an orientation of a liquid crystal composition confined between two substrates, and controls the degree of transmission of a light transmitted through those two substrates and the liquid crystal composition to display an image.
Data Source
AI summary
A liquid crystal display device includes a plurality of video signal lines that extends in columns in a display area, a plurality of inversion control signal line each supplied with an inversion control signal for controlling inversion, a first selector that selects one of a pair of amplifiers different in the polarity from each other to input signals corresponding to a pair of adjacent video signal lines on the basis of the inversion control signal, and a second selector that selects one of a pair of the corresponding adjacent video signal lines to input signals output from the pair of amplifiers on the basis of the inversion control signal, in which at least one of the signals to be supplied to the plurality of inversion control signal lines is a signal different from other signals.