Display Driving Method Reducing Leakage at Low Refresh Rates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with variable refresh rates experience increased transistor leakage and flicker when reducing refresh rates, leading to dimmer display brightness and perceived luminance changes, affecting display quality.
Innovation Solution
The electronic device and driving method involve sequentially scanning gate lines during an active period and maintaining them at a low voltage during a blank period, with voltage polarities of data lines remaining identical throughout both periods, and applying specific level voltages during the blank period to reduce leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the refresh rate is reduced to lower power consumption, then power consumption is reduced, but transistor leakage increases and display brightness becomes dimmer
Solution Approach 1:
The patent changes the voltage polarity parameters of data lines during the blank period to match the active period, preventing transistor leakage-induced brightness dimming while maintaining reduced refresh rate operation
2Use of energy by stationary object
If the refresh rate is reduced to lower power consumption, then power consumption is reduced, but flicker occurs due to increased transistor leakage
Solution Approach 1:
The patent modifies the voltage polarity parameters during the blank period to prevent transistor leakage, thereby eliminating flicker and maintaining display quality even at reduced refresh rates
3Loss of energy
If voltage polarity of data lines is inverted during blank period, then transistor leakage is reduced, but display quality may deteriorate
Solution Approach 1:
The patent optimizes the voltage polarity parameters during the blank period to achieve the dual benefit of reducing transistor leakage while maintaining consistent display quality, resolving the trade-off between energy loss and reliability
Data Source
AI summary
An electronic device includes gate lines, maintained at a low level voltage during a blank period and sequentially scanned during an active period in a frame period, and data lines. Voltage polarities of the data lines for all the blank period are respectively identical with voltage polarities of the data lines during the active period. A first level voltage applied to one of the data lines during all the blank period is related to an average value or a maximum value of level voltages of a portion or all of the data lines during the active period. A time length of the blank period in the frame period with the average value or the maximum value applied to one of the data lines during all the blank period is longer than a first time length of a first blank period in a first frame period adjacent to the frame period.