Display Voltage Curve Controller for Flicker Reduction
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while maintaining optimal image quality, as changes in driving voltage can lead to flicker and non-optimal image quality due to varying luminance.
Innovation Solution
A display device and method that include a voltage curve controller to calculate peak and full white grayscales based on a scale factor mode, generating compensated voltage curves to adjust driving voltage according to image data load and maximum grayscale, thereby reducing power consumption and minimizing voltage changes that cause flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If driving voltage is reduced to decrease power consumption, then power consumption is reduced, but luminance changes causing flicker occur
Solution Approach 1:
The patent implements dynamic voltage adjustment by generating different compensated voltage curves based on the actual image data load (black level, gray level, white level). Instead of using a fixed reduced voltage, the system adapts the driving voltage in real-time according to the displayed content, allowing power consumption to be reduced while maintaining stable luminance and preventing flicker.
Solution Approach 2:
The patent changes the voltage parameter dynamically by calculating compensated voltage curves that adjust the driving voltage based on the image data characteristics. The voltage curve controller generates customized voltage curves for different image loads, transforming the fixed voltage parameter into a variable one that adapts to content requirements, thereby resolving the contradiction between power saving and image quality.
2Loss of energy
If driving voltage is reduced to save power, then power consumption decreases, but flicker occurs due to luminance changes
Solution Approach 1:
The system dynamically adjusts the driving voltage based on the image data load characteristics. By implementing real-time voltage curve compensation tailored to each frame's content (black/gray/white level distribution), the system prevents luminance fluctuations that cause flicker while maintaining reduced power consumption compared to traditional fixed high-voltage driving.
Solution Approach 2:
The patent employs a feedback mechanism where the voltage curve controller analyzes the image data load and adjusts the driving voltage accordingly. The system monitors the actual display requirements and compensates the voltage in response, creating a closed-loop control that prevents flicker by maintaining appropriate luminance levels even when operating at reduced power consumption.
3Reliability
If compensated voltage curves are generated based on image data load, then image quality is optimized, but device complexity increases
Solution Approach 1:
The patent segments the image data analysis into distinct components (black level, gray level, white level calculations) and processes each separately to generate the compensated voltage curve. This segmentation approach allows the complex task of image analysis to be broken down into manageable steps, reducing the implementation complexity while maintaining optimal image quality.
Solution Approach 2:
The voltage curve controller performs self-service by automatically analyzing the image data load and generating appropriate compensated voltage curves without requiring external intervention. The system uses its own resources to process the image data and adjust the driving voltage, eliminating the need for additional complex external control circuits while achieving optimized image quality.
Data Source
AI summary
A display device and driving method may include a display panel, a voltage curve controller generating compensated voltage curves including a first compensated voltage curve having a second point with respect to a maximum grayscale and a fourth point with respect to an intermediate grayscale generated by normalizing a first point and a third point of a first reference voltage curve with respect to a peak white grayscale and a full white grayscale based on an entire grayscale, and a driving voltage controller generating a driving voltage from the compensated voltage curves based on a load of the input image data and a maximum grayscale value of the input image data.