Electro-optical Display Driving Circuit Voltage Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electro-optical devices, particularly in partial display mode, the center voltage of the image signal becomes smaller than the voltage of the common electrode due to pushdown effects, leading to potential differences that increase power consumption and cause burning or flickering in the display region, even when nothing is displayed in the non-display region.
Innovation Solution
The electro-optical device employs a data line driving circuit with a correction circuit that alternately performs positive and negative polarity writing based on a predetermined voltage, ensuring the center voltage of the image signal is the same as the common electrode voltage in partial display mode, and uses a correction table to adjust the image signal, thereby reducing power consumption and preventing burning or flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the center voltage of the image signal is set lower than the common electrode voltage to reduce power consumption in non-display regions, then power consumption is reduced, but burning or flickering occurs in the display region
Solution Approach 1:
The patent applies different voltage levels to different regions of the display. In partial display mode, the display region maintains a voltage difference between the image signal and common electrode to prevent burning and flickering, while the non-display region uses a reduced voltage difference to minimize power consumption. This regional differentiation resolves the contradiction between power savings and display stability.
2Reliability
If the center voltage of the image signal is set higher than the common electrode voltage to prevent burning or flickering, then display stability is improved, but power consumption increases in non-display regions
Solution Approach 1:
The patent implements region-specific voltage control where the display region receives sufficient voltage drive to prevent burning and flickering, while the non-display region operates with reduced voltage to minimize power consumption. This localized quality approach allows the system to optimize both display stability and energy efficiency simultaneously.
3Loss of energy
If partial display mode is used to reduce power consumption, then energy efficiency is improved, but voltage imbalance and burning occur in the display region
Solution Approach 1:
The patent employs different voltage drive strategies for display and non-display regions. The display region maintains proper voltage balance to prevent burning and ensure display quality, while the non-display region uses reduced voltage to achieve power savings. This localized differentiation resolves the contradiction between energy efficiency and display quality.
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 effectively reduces power consumption in the non-display region and prevents burning or flickering in the display region by maintaining the center voltage of the image signal at the same level as the common electrode voltage, even in partial display modes, ensuring efficient operation.
Implementation Method 1
a voltage level of the image signal is changed, so that the alignment or order of the liquid crystal molecules is changed, which results in gray-scale display through optical modulation of each pixel
Data Source
AI summary
An electro-optical device includes: an entire screen display mode and a partial display mode. In the entire screen display mode, positive and negative polarity image signals are supplied on the basis of a voltage that is greater than a voltage applied to the common electrode by a predetermined offset potential, and in the partial display mode, positive and negative polarity image signals are supplied on the basis of the voltage applied to the common electrode. In the partial display mode, the positive and negative polarity image signals are further corrected by the predetermined offset potential.