Display Driving Controller for Brightness–Power Balancing
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Solution Overview
Problem
Existing display devices face challenges in achieving improved display quality, particularly in managing power consumption and optimizing driving current for pixels.
Innovation Solution
The display device incorporates a driving controller that includes a first power controller, a second power controller, a calculation unit, and a data output unit. The first power controller calculates a load based on an image signal and adjusts the grayscale level using a gain lookup table and a calculation correction value. The second power controller outputs a driving voltage based on the image signal and a driving voltage lookup table. The calculation unit determines a calculation correction value to control the driving current of each pixel, optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the driving current of pixels is increased to improve display quality and brightness, then the display quality and brightness are improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic power management by continuously monitoring the actual power consumption of the display panel and adjusting the driving current in real-time. The controller modifies pixel driving currents based on detected power consumption levels, enabling the system to adapt between high brightness and low power consumption states as needed, rather than maintaining a fixed current level.
Solution Approach 2:
The patent changes the driving current parameter dynamically based on power consumption conditions. When power consumption exceeds thresholds, the system adjusts current parameters for groups of pixels, modifying brightness levels to reduce overall power usage while maintaining display functionality.
2Illumination intensity
If the driving current is uniformly increased across all pixels, then the brightness is improved, but the power consumption increases significantly
Solution Approach 1:
The patent applies different driving current levels to different groups of pixels based on their specific requirements and power consumption characteristics. Instead of uniform current distribution, the system selectively adjusts current for pixel groups, optimizing brightness where needed while minimizing power consumption in other areas, thereby improving overall energy efficiency.
Solution Approach 2:
The patent divides the pixel array into multiple groups and independently controls the driving current for each group. This segmentation allows the system to apply targeted current adjustments to specific regions rather than the entire display, reducing unnecessary power consumption while maintaining required brightness levels in critical areas.
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, and a driving controller which receives an image signal, and outputs a data signal. The driving controller includes a first power controller which outputs a load of a (N−1)-th image signal based on the image signal, N being a natural number of two or more, a second power controller which outputs a driving voltage of the (N−1)-th image signal based on the image signal, a calculation unit which receives the load, the driving voltage, and a maximum power data value, and outputs a calculation correction value for controlling a driving current of each of the plurality of pixels, and a data output unit which outputs the data signal, which is obtained by adjusting a grayscale level of the image signal, based on the load, the driving voltage, and the calculation correction value.