Dynamic Pre-Charging Voltage Adjustment for OLED Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display driving methods for OLED panels face inefficiencies in power consumption due to fixed pre-charging voltages that do not adjust with varying display content or lightness, leading to increased power usage and redundant consumption.
Innovation Solution
A display driving apparatus with a lightness adjusting unit, gamma adjusting unit, and pre-charging voltage adjusting unit dynamically adjusts the pre-charging voltage to match the highest or lowest data voltage, or be a shifted voltage from it, reducing the voltage difference and thus power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed pre-charging voltage is used to compensate for transistor threshold voltage variations, then manufacturing precision is improved, but power consumption increases due to large voltage differences
Solution Approach 1:
The patent applies dynamics by transforming the fixed pre-charging voltage into a dynamic, adjustable voltage. The pre-charging voltage is now varied according to the displayed content and lightness requirements, allowing the system to maintain optimal voltage differences and reduce power consumption while still compensating for transistor threshold variations.
Solution Approach 2:
The patent changes the parameter of pre-charging voltage from a fixed value to a variable value that adapts to different display conditions. By adjusting the pre-charging voltage parameter based on content and lightness requirements, the system minimizes voltage differences and reduces redundant power consumption while maintaining compensation effectiveness.
2Adaptability or versatility
If a fixed pre-charging voltage is used to ensure compatibility with all data voltages, then adaptability is improved, but power consumption increases due to redundant voltage differences
Solution Approach 1:
The system dynamically adjusts the pre-charging voltage to match the actual data voltage requirements. Instead of using a fixed voltage that must accommodate all possible data voltages, the pre-charging voltage is adapted in real-time to the current display content, eliminating redundant voltage differences and reducing energy loss.
Solution Approach 2:
The pre-charging voltage parameter is changed from a static value to a dynamic value that responds to display conditions. This parameter change allows the system to maintain voltage compatibility when needed while minimizing voltage differences during normal operation, thereby reducing redundant power consumption.
3Reliability
If the pre-charging voltage is set to cover the full range of data voltages, then reliability is improved, but power consumption increases due to larger voltage differences
Solution Approach 1:
The patent implements dynamics by making the pre-charging voltage adaptive rather than static. The voltage is adjusted based on actual display requirements, ensuring reliable operation when needed while minimizing voltage differences during normal operation to reduce power consumption.
Solution Approach 2:
The pre-charging voltage parameter is dynamically changed to match display content requirements. This allows the system to maintain full voltage coverage capability for reliability while operating at optimized voltage levels to minimize power consumption during actual display operations.
Data Source
AI summary
A display driving apparatus including a lightness adjusting unit, a gamma adjusting unit, a pre-charging voltage adjusting unit and a source driving unit is disclosed. The lightness adjusting unit receives and adjusts a lightness of an image data. The gamma adjusting unit adjusts a gamma voltage corresponding to the image data to generate a source data voltage. The pre-charging voltage adjusting unit calculates a highest data voltage and a lowest data voltage which can be outputted by a source electrode and adjusts a pre-charging voltage accordingly to make the adjusted pre-charging voltage the same with the highest data voltage or the lowest data voltage or only a shifted voltage different from the highest data voltage or the lowest data voltage of the image data. The source driving unit outputs the adjusted pre-charging voltage and the source data voltage to a display panel respectively.