Dynamic Pixel Driving Voltage Adjustment for OLED Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flat panel display devices, such as organic light-emitting displays, face challenges in reducing power consumption to extend battery life in small-sized electronic devices, as they consume significant power and current methods do not effectively address this issue without degrading image quality.
Innovation Solution
A display apparatus and method that includes a power generation unit, control unit, and source driver to generate and adjust pixel driving voltages and analog driving voltages based on extracted reference grayscale values, allowing for reduced power consumption while maintaining image quality by gamma-correcting image data to suit the adjusted voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional display methods are used to maintain image quality, then image quality is preserved, but power consumption is high
Solution Approach 1:
The patent applies dynamics by making the pixel driving voltage adjustable rather than fixed. The power generation unit dynamically adjusts the second pixel driving voltage ELVSS to different levels (first level for maximum grayscale value, second level for other grayscale values) based on the grayscale value of the image data, enabling power consumption optimization without compromising image quality display capability
Solution Approach 2:
The patent changes the parameter of pixel driving voltage levels. By switching between a first pixel driving voltage ELVDD and a second pixel driving voltage ELVSS at different levels according to the grayscale value, the system achieves parameter variation that reduces power consumption while maintaining the ability to display full grayscale range when needed
2Use of energy by moving object
If pixel driving voltages are reduced to save power, then power consumption decreases, but image quality may degrade
Solution Approach 1:
The system dynamically adjusts the second pixel driving voltage ELVSS between a first level and a second level based on the grayscale value of image data. When the grayscale value corresponds to the maximum brightness requirement, the voltage is set to the first level to ensure adequate display brightness. For other grayscale values, the voltage is reduced to the second level to save power, thus dynamically balancing brightness requirements with power consumption
Solution Approach 2:
The patent changes the voltage parameter ELVSS based on grayscale value requirements. By setting different voltage levels (first level ELVSS1 for maximum grayscale, second level ELVSS2 for other grayscale values), the system achieves parameter adaptation that prevents brightness degradation while optimizing power consumption
Data Source
AI summary
A display apparatus includes a power generation unit, a control unit, a source driver, and a display panel. The control unit configured to receive image data, determine a reference grayscale value of the image data, and convert the image data to corrected data according to the reference grayscale value. The power generation unit configured to generate a first pixel driving voltage, a second pixel driving voltage corresponding to the reference grayscale value, and an analog driving voltage corresponding to the reference grayscale value. The source driver configured to generate grayscale voltages by using the analog driving voltage and output, as an image signal, a grayscale voltage corresponding to the corrected data from among the grayscale voltages. The display panel configured to receive the image signal and display an image corresponding to the image signal using the first pixel driving voltage and the second pixel driving voltage.