3D Display Panel Driving Method for Luminance and Crosstalk Control
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Solution Overview
Problem
Current display technologies for 3D images, such as LCDs, face challenges in maintaining high luminance due to the use of polarized glasses and active shutter methods, which can decrease image brightness and introduce crosstalk between left-eye and right-eye frames.
Innovation Solution
A method of driving a display panel that involves outputting data voltage for 3D image frames along a scanning direction, blocking voltage during specific periods, and using black data voltage to reduce crosstalk, while maintaining data voltage during holding periods and gradually decreasing these periods to enhance luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polarized glasses method is used to divide 3D image into left-eye and right-eye frame images, then the 3D image can be displayed, but the luminance of the 3D image is decreased
Solution Approach 1:
The patent uses periodic scanning to display left-eye and right-eye frame images alternately. The display panel scans through different regions in a periodic manner, displaying 3D image data for one eye, then blocking data voltage and displaying black image data for the other eye. This periodic action allows the human eye to perceive both images as a single 3D image while maintaining high luminance by avoiding the use of polarized filters that would reduce light intensity.
2Adaptability or versatility
If active shutter glasses method is used to display left-eye and right-eye frame images, then the 3D image can be displayed, but crosstalk between left-eye and right-eye frames occurs
Solution Approach 1:
The patent divides the display panel into multiple regions along the scanning direction and assigns different display timing to each region. By segmenting the display process and controlling which regions display left-eye or right-eye images at different times, the patent eliminates crosstalk between frames. The data voltage is blocked during specific periods when black image data is to be displayed, ensuring that only the intended eye's image is visible to the observer.
Solution Approach 2:
The patent applies black image data in advance during periods when data voltage is blocked, preparing the display panel to prevent crosstalk before it occurs. By proactively displaying black image data during the blocking period, the patent ensures that no residual image information from the previous frame leaks into the next frame, thereby eliminating crosstalk.
3Object-generated harmful factors
If global blinking method is used to improve crosstalk between left-eye and right-eye frames, then crosstalk is reduced, but the luminance of the 3D image is decreased
Solution Approach 1:
Instead of applying global blinking to the entire display panel, the patent implements local quality control by blocking data voltage only during specific periods for specific regions. The data voltage is blocked during a second period less than the first period when black image data is to be displayed, while other regions continue to display image data normally. This localized approach reduces crosstalk without significantly impacting the overall luminance of the 3D image.
Data Source
AI summary
A method of driving a display panel includes outputting a data voltage of three-dimensional (“3D”) image data included in a left-eye data frame and a right-eye data frame to the display panel along a scanning direction of a first direction during a first period, blocking the data voltage from being provided to the display panel during a second period and outputting a black data voltage to the display panel during a third period that is less than the first period.