LCD Pixel Electrode Sharing Common Voltage to Reduce Power
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices require a separate common voltage supply for each pixel, leading to increased power consumption.
Innovation Solution
The LCD device connects the pixel electrode of one pixel to the opposing electrode of a neighboring pixel along a row or column line, allowing the pixel voltage to be used as a common voltage, eliminating the need for a separate common voltage supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate common voltage supply is provided for each pixel, then the liquid crystal layer can be effectively operated, but power consumption increases
Solution Approach 1:
The patent merges the common voltage supply function into the pixel electrode structure by connecting the pixel electrode of one pixel to the opposing electrode of a neighboring pixel. This eliminates the need for separate common voltage supplies for each pixel, reducing power consumption while maintaining liquid crystal layer operation through shared voltage pathways.
Solution Approach 2:
The pixel electrode is given a dual function: it serves as the pixel electrode for its own pixel and simultaneously as the opposing electrode (common electrode) for neighboring pixels. This multi-functionality reduces the total number of voltage supplies needed while ensuring proper liquid crystal operation across all pixels.
2Reliability
If a separate common voltage supply is provided for each pixel, then the liquid crystal layer can be effectively operated, but production costs increase
Solution Approach 1:
The patent merges the common voltage supply function into the pixel electrode structure by connecting the pixel electrode of one pixel to the opposing electrode of a neighboring pixel. This eliminates the need for separate common voltage supplies for each pixel, reducing power consumption while maintaining liquid crystal layer operation through shared voltage pathways.
Solution Approach 2:
The pixel electrode is given a dual function: it serves as the pixel electrode for its own pixel and simultaneously as the opposing electrode (common electrode) for neighboring pixels. This multi-functionality reduces the total number of voltage supplies needed while ensuring proper liquid crystal operation across all pixels.
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 configuration significantly reduces power consumption and production costs by eliminating the need for a common voltage supply, while maintaining effective operation of the liquid crystal layer.
Implementation Method 1
a storage capacitor Cst and a liquid crystal capacitor Clc connected to the thin film transistor T are formed
Implementation Method 2
The two substrates include electrodes that face each other such that a voltage applied between the electrodes induces an electric field across the liquid crystal material. Alignment of the liquid crystal molecules in the liquid crystal material changes in accordance with the intensity of the induced electric field into the direction of the induced electric field, thereby changing the light transmissivity of the LCD device.
Data Source
AI summary
A liquid crystal display device includes: a plurality of gate and data lines crossing each other on a substrate to define a plurality of pixels; a thin film transistor in each pixel region and connected to the corresponding gate and data lines; a pixel electrode in each pixel region and connected to a drain electrode of the thin film transistor; and an opposing electrode that forms a capacitor in each pixel along with the pixel electrode, wherein the pixel electrode of a pixel at a nth row line and a mth column line is connected to the opposing electrode of a neighboring pixel along the mth column line or along the nth row line.