Display Driving Method for Leakage Current Control
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Solution Overview
Problem
Display devices in low power consumption states experience picture shaking due to increased leakage current from thin film transistors, especially in strong light environments, as the reduced picture refresh frequency and prolonged leakage duration exacerbate this issue.
Innovation Solution
A driving method and device that adjust the picture refresh frequency in response to strong light environments by detecting light intensity, reducing the frequency to a first level and adjusting it to an optimal frequency based on current gray scale settings in non-strong light environments, both of which are lower than normal display frequencies to mitigate leakage current and shaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display device enters a low power consumption state with reduced picture refresh frequency, then power consumption is reduced, but leakage current increases and picture shaking becomes apparent
Solution Approach 1:
The patent applies dynamics by making the picture refresh frequency adjustable rather than fixed. The system dynamically changes the refresh frequency based on environmental light conditions - using a first refresh frequency in strong light environments and a second refresh frequency in weak light environments. This dynamic adjustment allows the system to optimize between power consumption and picture quality according to actual operating conditions, resolving the contradiction between low power consumption and leakage current control.
Solution Approach 2:
The patent changes the operational parameters of the display device by adjusting the picture refresh frequency based on light environment detection. By detecting ambient light intensity and correspondingly adjusting the refresh frequency parameter, the system adapts its operating characteristics to minimize both power consumption and harmful leakage current effects. This parameter change approach enables the system to move between different operational states to balance competing requirements.
2Use of energy by stationary object
If the picture refresh frequency is reduced in low power consumption state, then power consumption decreases, but the switching speed of thin film transistor slows down and leakage current increases
Solution Approach 1:
The system dynamically adjusts the picture refresh frequency based on environmental conditions rather than maintaining a fixed low frequency. In strong light environments where leakage current is naturally amplified, the system uses a higher first refresh frequency to maintain adequate switching speed. In weak light environments, it can use a lower second refresh frequency to maximize power savings. This dynamic approach resolves the contradiction by adapting switching speed to actual environmental demands.
Solution Approach 2:
The patent changes the refresh frequency parameter according to ambient light conditions. By detecting light intensity and adjusting the refresh frequency parameter accordingly, the system optimizes the balance between power consumption and transistor switching performance. This parameter adaptation allows the system to achieve low power consumption when conditions permit while maintaining adequate switching speed when environmental factors demand it.
3Use of energy by stationary object
If the display device operates in strong light environment with reduced refresh frequency, then power consumption is low, but leakage current increases significantly and shaking phenomenon is intensified
Solution Approach 1:
The patent implements a feedback mechanism by detecting ambient light intensity and using this information to adjust the picture refresh frequency. The light detection component provides feedback about environmental conditions, and the control component responds by selecting appropriate refresh frequencies. This closed-loop feedback system enables the display device to automatically adapt to strong light environments by increasing refresh frequency when light-induced leakage current becomes problematic, while maintaining low power consumption when conditions allow.
Solution Approach 2:
The system dynamically responds to environmental light conditions by adjusting operational parameters. Rather than using a fixed refresh frequency, the system changes its operating characteristics based on real-time environmental feedback. In strong light environments, it dynamically increases the refresh frequency to counteract light-induced leakage current effects, while in weak light environments it dynamically reduces frequency to minimize power consumption. This dynamic adaptation resolves the contradiction between power efficiency and resistance to light-induced harmful effects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively reduces picture shaking in low power consumption states by dynamically adjusting refresh frequencies, balancing leakage currents and maintaining reduced power consumption.
Implementation Method 1
a light intensity detection component is controlled to detect in real time whether the display device is in a strong light environment
Data Source
AI summary
Disclosed are a driving method of a display device and a driving device is described. The driving method of a display panel includes that in response to determining that the display device enters a low power consumption state, controlling a light intensity detection component to detect in real time whether the display device is in a strong light environment; in a case where the display device is in the strong light environment, controlling a driver chip to adjust a picture refresh frequency to a first frequency; in a case where the display device is not in the strong light environment, determining a current gray scale of the display device according to a latest user setting instruction, determining an optimal refresh frequency according to the current gray scale and a corresponding relationship between a preset gray scale and the optimal refresh frequency.