Stereoscopic Display Pixel Row Crosstalk Reduction
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Solution Overview
Problem
Standard shutter glasses type displays experience crosstalk between left and right eye images due to incomplete separation of image data during frame periods, leading to suboptimal stereoscopic image rendering.
Innovation Solution
A method and display device that writes black data to pixel rows during portions of frame periods to prevent crosstalk, using a progressive emission with simultaneous scan (PESS) method and power supply voltage control to ensure accurate timing and emission of left and right eye images, thereby preventing image data overlap at emission end times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard shutter glasses type display is used to provide stereoscopic image, then left and right eye images can be displayed alternately, but crosstalk occurs between left and right eye images due to incomplete separation of image data during frame periods
Solution Approach 1:
The patent applies preliminary action by writing black data to pixel rows in advance during specific portions of frame periods (first and third frame periods) before the actual image data is displayed. This pre-preparation ensures that when the display transitions between left and right eye images, the pixel rows are already in a clean state, preventing residual image data from causing crosstalk. The black data writing occurs during non-emission periods, preparing the display state beforehand for accurate stereoscopic image separation.
2Duration of action of stationary object
If image data is written continuously during frame periods to maintain display continuity, then display smoothness is improved, but image data overlap occurs at emission end times causing crosstalk
Solution Approach 1:
The patent segments the frame period into distinct portions: emission periods for displaying left and right eye images, and non-emission periods for writing black data. By dividing the continuous frame period into these functional segments, the patent ensures that image data writing and black data writing occur at different times, preventing overlap while maintaining overall display continuity. The emission periods are carefully timed to ensure complete image display before transitioning to black data writing phase.
Solution Approach 2:
The patent implements periodic action by alternately performing image data writing during emission periods and black data writing during non-emission periods in a regular cycle. This periodic pattern ensures that black data is written to pixel rows at specific intervals (during first and third frame periods), creating a rhythmic sequence that prevents image data overlap while maintaining continuous display operation. The periodic timing ensures synchronization between image display and black data refresh.
Data Source
AI summary
A method of displaying a stereoscopic image and a display device are disclosed. In one aspect, the method includes sequentially writing black data to a portion of the pixel rows during a portion of a first frame period and sequentially writing left eye image data to the pixel rows during the remaining portion of the first frame period and during a second frame period. The method also includes driving the pixel rows to simultaneously emit light during a first emission period, sequentially writing the black data to the portion of the pixel rows during a portion of a third frame period, and sequentially writing right eye image data to the pixel rows during the remaining portion of the third frame period and during a fourth frame period. The method further includes driving the pixel rows to simultaneously emit light during a second emission period corresponding to the fourth frame period.