3D Display Shutter Timing Control for Crosstalk Reduction
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Solution Overview
Problem
Current 3D image display technologies using shutter glasses suffer from crosstalk issues due to ghosting effects caused by residual images seen by the wrong eye, which affects the depth perception and realism of the 3D representation.
Innovation Solution
A 3D image display device that alternately displays left and right eye images with a common voltage synchronized with a voltage reset signal, maintaining the voltage at a high level for a predetermined time to ensure the display panel shows black before switching between images, thereby reducing crosstalk by controlling the shutter states and backlight unit operation based on 3D sync signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If shutter glasses are used to display 3D images, then depth perception is improved, but crosstalk occurs causing ghosting effects
Solution Approach 1:
The patent applies a reset voltage to the liquid crystal molecules in the shutter glasses before switching between left and right eye images. This preliminary action clears any residual alignment from previous frames, ensuring that the liquid crystals start from a known state and reduce ghosting effects caused by incomplete switching.
Solution Approach 2:
The patent implements periodic application of reset voltage at specific timing intervals synchronized with the frame switching rate. By applying the reset voltage periodically just before each frame transition, the system maintains consistent liquid crystal alignment and minimizes crosstalk between alternating left and right eye images.
2Speed
If voltage is applied to switch shutter states quickly, then response time is reduced, but residual images may remain causing ghosting
Solution Approach 1:
The reset voltage is applied in advance before the main switching voltage, preparing the liquid crystal molecules by clearing their previous alignment. This preliminary action ensures that when the main switching voltage is applied, the liquid crystals can transition more completely and quickly to the desired state without leaving residual images.
Solution Approach 2:
The patent changes the voltage parameter by applying a reset voltage that is different from the normal driving voltage. This reset voltage is specifically designed to realign the liquid crystal molecules to a neutral or known state, enabling faster and more complete transitions that eliminate residual images while maintaining quick response times.
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 significantly reduces crosstalk and enhances the perceived depth and luminance of the 3D image by ensuring precise timing and state control of the shutters and backlight, improving the overall 3D viewing experience.
Implementation Method 1
a common voltage synchronized with a voltage reset signal is applied to the display panel and the voltage reset signal is maintained at a high level for a predetermined time before the left eye image or the right eye image is input
Data Source
AI summary
A three dimensional image display device, including: a display panel that alternately displays a left eye image and a right eye image, wherein a common voltage synchronized with a voltage reset signal is applied to the display panel and the voltage reset signal is maintained at a high level for a predetermined time before the voltage reset signal is input to the left eye image or the right eye image.