3D Display Panel Driving Method Reducing Crosstalk
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Solution Overview
Problem
Conventional stereoscopic image display apparatuses experience crosstalk due to slow liquid crystal response time, particularly degrading 3D display quality, especially at the lower areas of the screen.
Innovation Solution
A method of driving a display panel where data voltages representing left-eye or right-eye images are outputted to specific signal lines during alternating periods of a frame, with gate signals being generated for interleaved groups of gate lines, and data signals provided synchronously to pixels, effectively reducing crosstalk by spreading the even-line image across the display panel during the latter part of the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data voltages are outputted to signal lines sequentially during a frame period, then the display panel can render 3D images, but crosstalk occurs due to slow liquid crystal response time, degrading display quality
Solution Approach 1:
The patent divides the frame period into multiple sub-frames and segments the signal lines into different groups. Data voltages are outputted to different signal line groups in different time periods, which segments the charging process and reduces crosstalk between left-eye and right-eye images. This segmentation allows the liquid crystal to respond more accurately without interference from adjacent pixel charging.
Solution Approach 2:
The patent applies preliminary action by outputting data voltages to signal lines in a specific sequence before the liquid crystal fully responds. By controlling the timing of voltage application and using multiple sub-frames, the system prepares the display panel in advance to minimize crosstalk effects during the critical response period of the liquid crystal material.
2Productivity
If the scan direction progresses from upper area toward lower area, then the display panel can be driven efficiently, but crosstalk is observed more heavily at the lower area
Solution Approach 1:
The patent segments the signal lines into multiple groups and distributes them across different time periods. This segmentation ensures that even in the lower area where crosstalk is most prominent, the liquid crystal has sufficient time to respond accurately to the applied voltages without interference from adjacent scanning operations.
Solution Approach 2:
The patent introduces dynamic timing control where the frame period is divided into multiple sub-frames with different data voltage output periods. This dynamic adjustment allows the system to optimize the charging time for different regions of the display panel, particularly compensating for the slower response characteristics in the lower area.
Data Source
AI summary
Provided is a method of driving a display panel, including: outputting first data voltages representing a left-eye image or a right-eye image to first signal lines among a plurality of signal lines of the display panel during a first period of a frame for rendering the left-eye or right-eye image of a three-dimensional (3D) image; outputting second data voltages representing the left-eye image or right-eye image for second signals among the plurality of signal lines of the display panel during a second period of the frame for rendering the left-eye or right-eye image of the 3D image; and stopping the data voltages from being outputted to the display panel during a third period of the frame.