LCD Pixel Switching for Motion Image Quality
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) experience image dragging phenomena and deteriorated motion image quality when displaying rapid motion images due to their hold-type image display mode.
Innovation Solution
The implementation of an LCD with additional switches and drivers that simulate an impulse-type image display mode by adjusting luminance intensity through video and black signal scan lines and data lines, allowing for a shorter time interval between luminance states to mimic CRT monitor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hold-type image display mode is used, then image stability is maintained, but motion image quality deteriorates and image dragging occurs
Solution Approach 1:
The patent applies periodic action by implementing a dual-mode display system that alternates between hold-type display for static images and impulse-type display for motion images. The pixel electrode switches between maintaining a held voltage state for stability and receiving periodic voltage pulses for motion clarity, resolving the contradiction between image stability and motion image quality.
2Use of energy by moving object
If hold-type display mode is used, then power consumption is reduced, but image dragging phenomenon occurs during rapid motion display
Solution Approach 1:
The patent implements dynamics by making the pixel electrode's voltage state adaptive rather than static. The pixel electrode dynamically switches between held voltage mode (low power) and impulse voltage mode (high performance) based on motion detection, allowing the system to optimize between power consumption and image quality according to actual display needs.
3Stability of the object's composition
If frame time is extended for hold-type display, then image stability is improved, but response time increases causing motion blur
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the voltage application time parameter. For motion images, the system reduces the effective display duration from full frame time to a shorter impulse duration, changing the temporal parameter to achieve faster response while maintaining stability through the hold-type architecture for static content.
Data Source
AI summary
A liquid crystal display (LCD) with improved motion image quality. The LCD displays a frame during a frame time. A pixel of the LCD has a first switch and a second switch. At a first time point, the first switch is turned on by a video scan line, and a video data signal is transmitted to the pixel through a video data line, which make the pixel have first luminance intensity. At a second time point, the second switch is turned on by a particular color signal scan line, and a particular color data signal is transmitted to the pixel through a particular color signal data line, which make the pixel have second luminance intensity smaller than the first luminance intensity. A time interval between the second time point and the first time point is smaller than the frame time and the image dragging phenomenon is avoided.