Sub-pixel Transition Control for Display Devices
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Solution Overview
Problem
Display devices face issues with defective display due to sub-pixel transitions, particularly caused by uneven transitions between sub-pixels of different colors, leading to increased power consumption and complexity in control.
Innovation Solution
A display device and method that involve a transition control unit to sequentially supply source signals to sub-pixels during horizontal periods, reducing the number of transitions by time-dividing the periods and using a source multiplexer to control the supply of source signals, ensuring equal transitions for each color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If source signals are supplied to all sub-pixels simultaneously during each horizontal period, then image display is maintained, but the number of transitions increases causing defective display and higher power consumption
Solution Approach 1:
The patent segments the sub-pixels into different groups (first group and second group) that are driven at different times. During odd horizontal periods, the first group is driven; during even horizontal periods, the second group is driven. This temporal segmentation reduces the frequency of transitions between sub-pixel groups, thereby reducing defective display artifacts while maintaining complete image coverage across alternating periods.
Solution Approach 2:
The patent implements periodic action by alternating the driving of different sub-pixel groups in a regular pattern based on horizontal period parity. The first sub-pixel group is driven during odd horizontal periods while the second group is driven during even horizontal periods, creating a periodic driving scheme that reduces transition frequency and eliminates defective display caused by frequent transitions.
2Productivity
If transitions between sub-pixels of different colors are performed frequently, then image updates are achieved, but power consumption increases
Solution Approach 1:
The patent segments sub-pixels into multiple groups that can be driven independently at different times. By dividing sub-pixels into first and second groups with different driving schedules, the system reduces the total number of transitions required for image updates, thereby lowering power consumption while maintaining image update capability through alternating activation of different groups.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining that one sub-pixel group is always active while another is inactive, and vice versa in the next period. This continuous alternating driving ensures that image display is maintained without interruption while reducing the overall transition frequency compared to driving all sub-pixels simultaneously, thus lowering power consumption.
3Use of energy by moving object
If transitions between sub-pixels are reduced, then power consumption is lowered, but image completeness may be compromised
Solution Approach 1:
The patent uses periodic action to alternately drive different sub-pixel groups during odd and even horizontal periods. This ensures that over time, all sub-pixels are driven and complete images are displayed, while the transition frequency is reduced in any single period. The periodic alternation maintains image completeness across frames while lowering overall power consumption.
Solution Approach 2:
The patent prepares different sub-pixel groups for driving in advance based on the horizontal period parity. By pre-organizing which group will be driven in odd versus even periods, the system ensures that image completeness is maintained without requiring all sub-pixels to transition simultaneously, thus reducing power consumption while preserving display integrity.
Data Source
AI summary
A display device includes a display panel including gate lines, data lines, a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, wherein the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are defined by intersections between the data lines and gate lines; a data driver configured to apply a source signal to the data lines; and a transition control unit configured to control a sequential supplying of the source signal to the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel during a kth horizontal period and a sequential supplying of the source signal to the third color sub-pixel, the first color sub-pixel, and the second color sub-pixel during a k+1th horizontal period.