Display Device Grayscale Converter Voltage Drop Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face a trade-off between power consumption and display quality due to voltage drop compensation, as different pixels experience varying voltage drops based on position and grayscale values, affecting their luminance and efficiency.
Innovation Solution
A display device and driving method that utilize a grayscale converter to calculate and apply compensation offsets based on pixel positions and input grayscales, incorporating a maximum luminance weight to adjust voltage drops, and an on-pixel ratio to optimize data voltages, thereby improving display quality and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voltage drop compensation is applied to improve display quality, then luminance uniformity is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation values in lookup tables (LUTs) during a calibration phase. During normal operation, the grayscale converter simply retrieves pre-computed compensation values based on pixel position and input grayscale, avoiding real-time complex calculations and reducing operational power consumption while maintaining luminance uniformity
Solution Approach 2:
The patent changes parameters by introducing a maximum luminance weight parameter that dynamically adjusts the strength of compensation based on the input maximum luminance value. When maximum luminance is high, the weight is reduced (less compensation needed), and when maximum luminance is low, the weight is increased (more compensation needed), optimizing the balance between display quality and power consumption
2Illumination intensity
If maximum luminance is increased to improve display quality, then luminance output is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the maximum luminance weight a dynamic parameter that automatically adjusts based on the input maximum luminance value. The weight decreases as maximum luminance increases, creating a feedback mechanism that optimizes power consumption while maintaining perceived display quality across different luminance conditions
Data Source
AI summary
A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.