Active Matrix Display Data Enable Signal Timing Control
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Solution Overview
Problem
Active matrix-type liquid crystal display devices face issues with excessive time usage for rendering images, leading to undesirable mixed images due to the existing driving methods that are not optimized for their operational characteristics.
Innovation Solution
The implementation of a data enable signal with specific time intervals, where data signals are not input during certain intervals and are input during others, with the latter interval being shorter than the former, to improve time resolution and reduce mixed image display time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data signals are continuously input to the pixel region during the entire frame time, then the image rendering is complete, but the display device shows undesirable mixed images due to excessive time usage for rendering
Solution Approach 1:
The data enable signal is segmented into multiple time intervals within a frame, including first, second, third, and fourth time intervals. Data signals are selectively input during specific intervals (second and fourth) while remaining inactive during others (first and third), thereby segmenting the continuous data input process to prevent mixed image display and improve time resolution.
2Manufacturing precision
If the data input time interval is extended to ensure complete image rendering, then the image quality is maintained, but the time for mixed image display increases
Solution Approach 1:
The data enable signal operates periodically with alternating active and inactive intervals. Data signals are input during the second time interval and fourth time interval, while the first and third intervals are inactive. This periodic action ensures complete image rendering occurs within the active intervals while minimizing the total duration of data input, thereby reducing mixed image display time.
3Loss of time
If the existing driving method is used with equal time intervals for data input and storage, then the operation is simple, but the time resolution is insufficient leading to mixed image display
Solution Approach 1:
The data enable signal dynamically adjusts its state between active and inactive across different time intervals within a frame. The signal transitions from inactive (first interval) to active (second interval), then to inactive (third interval), and finally to active (fourth interval). This dynamic control optimizes time resolution by precisely controlling when data signals are input, preventing mixed image display while maintaining manageable signal control structure.
Data Source
AI summary
A liquid crystal display device includes a liquid crystal panel having a pixel region, a graphic interface unit generating a first data enable signal having first and second time intervals, a signal modulating unit generating a second data enable signal by using the first data enable signal, the second data enable signal having third and fourth time intervals, and a timing controller generating the data signals by using the second data enable signal, wherein data signals are not input to the pixel region during the third time interval and are input to the pixel region during the fourth time interval, and the forth time interval is shorter than the second time interval.