Liquid Crystal Display Driving Method Reducing Motion Blur
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hold-type display devices suffer from motion blur issues, leading to image blurring and trace effects when displaying moving images, and existing solutions either increase power consumption, complexity, or compromise image quality.
Innovation Solution
A driving method for liquid crystal display devices that divides the frame period into subframes with specific voltage applications to the liquid crystal element, including a backlight divided into light-emitting regions, to minimize motion blur and optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If hold-type display devices continuously emit light in one frame period, then the display structure is simple and power consumption is low, but motion blur occurs and image quality deteriorates
Solution Approach 1:
The frame period is divided into multiple subframe periods with different luminance levels. Instead of continuous light emission, the display is segmented into discrete time intervals (e.g., high luminance subframes and low luminance subframes), allowing motion blur reduction while maintaining hold-type device simplicity.
Solution Approach 2:
The display employs periodic alternation between high luminance and low luminance subframe periods. This periodic action creates effective motion blur reduction by resetting the liquid crystal molecules periodically, while maintaining the continuous light emission characteristic of hold-type devices.
2Manufacturing precision
If black image periods are inserted to reduce motion blur, then moving image quality improves, but power consumption increases and average luminance decreases
Solution Approach 1:
Instead of using complete black image periods (zero luminance), the invention uses low luminance subframe periods with reduced but non-zero luminance. This parameter change allows motion blur reduction while maintaining higher average luminance and lower power consumption compared to traditional black image insertion methods.
3Manufacturing precision
If frame rate is increased to reduce motion blur, then moving image quality improves, but device complexity and power consumption increase
Solution Approach 1:
The invention achieves motion blur reduction using the existing hold-type display structure and driving circuitry by implementing subframe periods with different luminance levels. This multi-functional approach allows the same hardware to achieve both continuous light emission and motion blur reduction without increasing device complexity.
4Illumination intensity
If high luminance is applied continuously to maintain image brightness, then luminance quality is maintained, but power consumption increases
Solution Approach 1:
High luminance subframe periods are strategically positioned before low luminance subframe periods. This preliminary action of displaying high luminance content first allows the liquid crystal molecules to be in a state that reduces motion blur, while the subsequent low luminance periods maintain the effect without requiring continuous high power consumption.
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 motion blur, enhances image quality, and lowers power consumption while maintaining high response speed and wide viewing angles for both still and moving images.
Implementation Method 1
an image is displayed by applying signal voltage Vi in accordance with an image signal to a liquid crystal element
Data Source
AI summary
To provide a hold-type display device without a problem of motion blur and a driving method thereof. The length of a period for displaying a blanking image in one frame period is controlled in accordance with a control parameter showing the degree of motion blur, and the level of a signal supplied to a display element is changed in accordance with the length of the period for displaying the blanking image. Accordingly, the hold-type display device without a problem of motion blur and the driving method thereof can be provided.