Display Device Scan Signal Ordering by Average Data Voltage
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Solution Overview
Problem
Display devices experience high power consumption due to significant changes in data signal voltage levels, particularly when displaying images with continuous transitions between low and high gradations, leading to increased voltage swings.
Innovation Solution
A display device with a scan driving unit, data driving unit, and timing control unit that manages scan signals and data voltages by applying scan-on signals based on the average data voltages to reduce voltage swings and power consumption, either in ascending or descending order of averages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If scan-on signals are applied in conventional sequential order to all scan lines, then the display operation is simple and reliable, but the voltage level of data signals swings significantly between low and high voltages causing high power consumption
Solution Approach 1:
The patent changes the parameter of scan signal application order from conventional sequential order to an order based on average data voltage levels. The timing control unit calculates average data voltages for groups of scan lines and applies scan-on signals accordingly, thereby reducing voltage swings and power consumption while managing the increased control complexity through systematic parameter optimization.
Solution Approach 2:
The patent applies different scan signal timing strategies to different groups of scan lines based on their local characteristics (average data voltage levels). By dividing scan lines into groups and applying scan-on signals to groups with lower average voltages first, the system optimizes power consumption locally for each group while maintaining overall display functionality.
2Illumination intensity
If data voltages are frequently switched between low and high levels to display stripe patterns, then the image display capability is maintained, but the power consumption increases significantly
Solution Approach 1:
The timing control unit performs preliminary calculation of average data voltages for each group of scan lines before applying scan-on signals. This preliminary action allows the system to anticipate voltage requirements and sequence scan line activation to minimize unnecessary voltage transitions, thereby reducing power consumption while maintaining image display quality.
Solution Approach 2:
The patent implements periodic scanning of scan line groups in an optimized sequence rather than continuous sequential scanning. By periodically activating groups of scan lines based on their average voltage characteristics, the system reduces the frequency of voltage transitions and minimizes power consumption while maintaining display performance.
Data Source
AI summary
A display device includes a display panel including a plurality of scan lines, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels that is connected to the plurality of scan lines and the plurality of data lines, a scan driving unit which provides a plurality of scan signals, each of which includes a scan-on signal and a scan-off signal, to the plurality of scan lines, a data driving unit that provides data voltages to the plurality of data lines, and a timing control unit that determines an order in which the scan signals are provided to the plurality of scan lines, where the scan-on signal is provided to each of the plurality of scan lines based on an order of averages of the data voltages transferred to the pixels connected thereto.