Display Driving Controller With Dynamic Gamma Voltages for Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in reducing power consumption without compromising image quality and performance.
Innovation Solution
A driving controller that switches between normal and power-saving modes, adjusting gamma voltage levels and power supply voltages based on input image signals and peak signals, using a power control module, peak voltage memory, degradation compensator, and voltage controller to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If gamma voltage levels are reduced to save power, then power consumption decreases, but image quality may deteriorate
Solution Approach 1:
The system dynamically adjusts gamma voltage levels based on operating conditions. In power-saving mode, the driving controller reduces gamma voltage levels below normal operation levels, while still maintaining acceptable image quality through adaptive control. This resolves the contradiction by making the voltage levels dynamic rather than fixed, allowing optimization of both power consumption and image quality based on real-time conditions.
Solution Approach 2:
The patent changes the voltage level parameter of gamma voltages to achieve power savings. By operating at reduced voltage levels in power-saving mode compared to normal mode, the system reduces power consumption while managing to maintain sufficient image quality through the combined effect of multiple voltage adjustments and adaptive control mechanisms.
2Loss of energy
If voltage levels are dynamically adjusted, then power efficiency improves, but control complexity increases
Solution Approach 1:
The driving controller is designed to perform multiple functions: it normally drives the display panel and also functions as a power management unit that adjusts gamma voltage levels. By integrating these functions into a single controller, the patent reduces overall system complexity while achieving improved energy efficiency through dynamic voltage adjustment.
Solution Approach 2:
The system uses feedback mechanisms to monitor operating conditions and adjust gamma voltage levels accordingly. The driving controller receives feedback about the current operating state and automatically adjusts voltage levels to optimize power efficiency, reducing the need for complex external control circuits while maintaining energy efficiency.
Data Source
AI summary
Provided is a display device comprising a display panel, a driving controller that receives an input image signal and outputs an image data signal, a voltage generator that generates a plurality of gamma voltages in response to a voltage control signal, and a data driving circuit that receives the plurality of gamma voltages and provides a data signal corresponding to the image data signal to the display panel. The driving controller operates between in a normal mode and in a power-saving mode. During the power-saving mode, the driving controller outputs the voltage control signal for changing voltage levels of the plurality of gamma voltages in response to the input image signal and a peak signal. At least one of the plurality of gamma voltages has a first voltage level during the normal mode and has a second voltage level lower than the first voltage level during the power-saving mode.