Liquid Crystal Display Second Thin Film Transistor Motion Blur
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Solution Overview
Problem
Liquid crystal displays suffer from a motion blur phenomenon due to the slow response speed of liquid crystals, which is exacerbated by the reduction in data charging time when using methods like inserting black data to increase frame frequency or divide image data charging periods.
Innovation Solution
The implementation of a second thin film transistor and a common voltage system that supplies a common voltage to the pixel electrode, allowing for the replacement of black data and maintaining data charging time through the first thin film transistor, while controlling the gray scale level display period based on average brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If black data is inserted between frames to increase frame frequency, then motion blur is reduced, but data charging time is reduced
Solution Approach 1:
The gate lines are divided into two groups (first gate lines and second gate lines) that are driven by separate gate drivers. This segmentation allows independent control of scanning periods, enabling the first gate driver to charge image data while the second gate driver handles other operations, thereby preventing reduction of data charging time when increasing frame frequency
Solution Approach 2:
Image data is charged to the liquid crystal cells in advance during the scanning period of the second gate lines, before the display period of the first gate lines begins. This preliminary charging action ensures that data is fully loaded before display starts, maintaining adequate charging time even when frame frequency is increased
2Speed
If the horizontal period charging image data is divided into smaller periods, then motion blur is reduced, but data charging time is reduced
Solution Approach 1:
The display period is divided into first and second display periods corresponding to first and second gate line groups. Image data charging is performed during the second display period while display occurs during the first display period. This segmentation allows overlapping of charging and display operations, maintaining full charging time while improving response speed through divided periods
Solution Approach 2:
While the first gate driver is displaying image data during the first display period, the second gate driver simultaneously charges image data during the second display period. This continuous useful action ensures that charging operations never idle, maintaining adequate charging time while improving overall system response speed
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
This solution effectively prevents motion blur without reducing image data charging time, enabling improved display performance by adjusting the gray scale level display period according to image brightness.
Implementation Method 1
A liquid crystal display controls the light transmittance of a liquid crystal that has a dielectric anisotropy that uses an electric field
Implementation Method 2
A liquid crystal display controls the light transmittance of a liquid crystal that has a dielectric anisotropy that uses an electric field
Data Source
AI summary
A method of driving and a liquid crystal display that are adaptive for preventing a motion blur phenomenon inserting a black data without reducing a data charging time are disclosed.In the liquid crystal display, a first gate line supplies a first scanning signal. A second gate line supplies a second scanning signal. A data line supplies a data signal. A common line supplies a common voltage. A first thin film transistor supplies the data signal in response to the first scanning signal. In a liquid crystal cell, a pixel electrode is connected to the first thin film transistor and a common electrode is connected to the common line. A second thin film transistor supplies the common voltage to the pixel electrode in response to the second scanning signal.