3D Display Device Column Scanning Lenticular Lens Crosstalk
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Solution Overview
Problem
Current lenticular lens grating 3D display devices suffer from image crosstalk due to the simultaneous display of different frames in different regions of the panel, which affects the 3D display effect.
Innovation Solution
The display panel is driven by scanning column by column, with the lenticular lens grating's lens structure synchronously changed to match the image being displayed, and a black frame can be inserted between frames to ensure that the lens structure aligns with the next frame's image, preventing crosstalk and enhancing the 3D display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel is driven by scanning row by row, then the image can be refreshed continuously, but image crosstalk occurs because different frames are displayed simultaneously in different regions
Solution Approach 1:
The patent inverts the conventional row-by-row scanning direction and implements column-by-column scanning instead. This fundamental reversal of the scanning approach allows the lenticular lens grating to be refreshed synchronously with the displayed image content, preventing image crosstalk while maintaining continuous refresh capability.
Solution Approach 2:
The patent introduces a black frame before the actual image frame to preliminarily refresh the lenticular lens grating. This preliminary action ensures that the lens grating is properly aligned and ready to guide light from the upcoming frame, preventing crosstalk from the previous frame while maintaining continuous display operation.
2Reliability
If the lenticular lens grating structure is changed to match the second frame, then the 3D display effect is improved, but image crosstalk occurs because the first frame image remains in the upper portion
Solution Approach 1:
The patent changes the scanning direction from row-by-row to column-by-column, which fundamentally alters the refresh sequence. This inversion ensures that when the lenticular lens grating is updated for the second frame, the entire panel is being refreshed in sync, preventing the simultaneous display of different frames in different regions that causes crosstalk.
Solution Approach 2:
By inserting a black frame before the actual image content, the patent performs a preliminary refresh of the lenticular lens grating. This ensures that the lens grating structure is properly aligned with the incoming frame data before display begins, eliminating crosstalk while maintaining the 3D display effect.
3Object-affected harmful factors
If column by column scanning is implemented, then image crosstalk is reduced, but the scanning complexity increases
Solution Approach 1:
While column-by-column scanning does change the control logic, the patent simplifies the overall system by aligning the scanning direction with the natural structure of lenticular lens gratings (which are typically arranged in columns). This inversion of the conventional approach actually reduces complexity by creating a more direct correspondence between the scanning sequence and the optical guiding structure.
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 approach effectively reduces image crosstalk and improves the 3D display resolution by ensuring that each column of sub-pixel units displays the correct image under the refreshed lenticular lens grating, enhancing the overall 3D display experience.
Implementation Method 1
the lenticular lens grating is used to spit light emitted from a left eye pixel and a right eye pixel of a display panel
Implementation Method 2
a single eye of the viewer can substantially obtain a stimulations from both the odd number columns of sub-pixel units and the even number columns of sub-pixel units at the same time due to the visual persistence effect of the human eye
Implementation Method 3
The signal voltage applied to the pixel electrode in each of the sub-pixel units and a common voltage applied to a common electrode form a pixel electric field, which controls a deflection of liquid crystal molecules in each of the sub-pixel units to realize the display
Data Source
Figure 1~2a
Figure 2b~3
Figure 4~5
AI summary
Embodiments of the present invention disclose a 3D display device and a driving method thereof, and the 3D display device comprises: a display panel, comprising sub-pixel units arranged in a matrix and defined by data lines and gate signal lines, and each gate signal line being located between two adjacent columns of sub-pixel units; a lenticular lens grating, provided at a light exiting side of the display panel, splitting light emitted from the display panel, and comprising lens units, wherein each lens unit corresponds to at least two adjacent columns of sub-pixel units; in a 3D display mode, columns of sub-pixel units alternatively display a left/right eye image and a right/left eye image, and each lens unit comprises, in a region corresponding to each column of the sub-pixel units, a lens structure matching the left or right eye image currently displayed by the column of the sub-pixel units.