Odd Pixel Column Display Driving Circuit Polarity Inversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices using row-reversed driving methods experience high power consumption due to equal numbers of pixel columns with positive and negative polarities, leading to inefficient energy usage.
Innovation Solution
A display device with an odd number of pixel columns, where the data driver generates signals to reverse the polarity of some pixel columns during a predetermined cycle, ensuring that in each frame, the number of positive and negative pixel columns are balanced, with specific configurations for normal, auxiliary, and compensation frames to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If row-reversed driving way is used with equal numbers of positive and negative polarity pixel columns, then image display is achieved, but power consumption increases
Solution Approach 1:
The patent applies asymmetry by using an odd number of pixel columns (e.g., 3, 5, 7) instead of the conventional even number arrangement. This creates an asymmetric polarity distribution where one polarity has (N+1)/2 columns and the other has (N-1)/2 columns within each frame, breaking the symmetric balance that causes high power consumption in conventional designs.
Solution Approach 2:
The patent implements periodic action through a cycle period comprising multiple frames (e.g., 10 frames for 3 columns, 14 frames for 5 columns). Within each cycle, the polarity distribution alternates between frames with different polarity assignments, creating a periodic pattern that balances power consumption over time while maintaining the odd-number column advantage in individual frames.
2Use of energy by moving object
If odd number of pixel columns is used with partial polarity reversal, then power consumption decreases, but driving circuit complexity increases
Solution Approach 1:
The patent segments the pixel columns into two groups with different polarity assignments. For example, with 3 columns, columns 1 and 2 share one polarity while column 3 has the opposite polarity in certain frames. This segmentation allows independent control of polarity patterns and simplifies the driving circuit logic compared to managing all columns uniformly.
Solution Approach 2:
The patent applies partial action by not reversing polarity in all pixel columns within each frame, but only in specific columns according to the odd-number pattern. This partial reversal approach reduces the total number of polarity switching operations compared to full reversal schemes, thereby reducing circuit complexity while still achieving power consumption reduction.
3Use of energy by moving object
If polarity is reversed in all pixel columns each frame, then image display is maintained, but power consumption increases due to excessive switching
Solution Approach 1:
The patent uses periodic action where the polarity pattern repeats over a cycle period of multiple frames. Within each cycle, different frames have different polarity assignments, but the overall pattern is periodic and predictable. This maintains image display stability while reducing unnecessary polarity switching compared to frame-by-frame full reversal.
Solution Approach 2:
The patent changes the polarity parameter selectively for specific pixel columns rather than uniformly for all columns. By controlling which columns reverse polarity and which maintain their polarity, the system optimizes power consumption while maintaining reliable image display through controlled parameter variation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are a display apparatus and a method for displaying an image thereby. The display apparatus comprises a display panel and a drive circuit. The display panel comprises a first number of pixel columns, a second number of scanning lines and a first number of data lines; the drive circuit comprises a scanning driver and a data driver; and the data driver is used for driving, in a pre-determined cycle period, by means of a data drive signal and in a driving mode of some columns being inverted, the display panel to display images frame by frame. The present invention can reduce the power consumption of a display apparatus.