Autostereoscopic 3D Cell Flicker Reduction via Frame Rate Multiplication
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Solution Overview
Problem
Autostereoscopic displays using switchable barriers or lenses experience flicker due to the variation in kickback voltage when driven with alternating current, which can degrade the stereoscopic image quality if synchronized with the liquid crystal display's flicker.
Innovation Solution
Increasing the frame rate of the 3D cell to a higher rate than the display panel, typically by multiplying the frame rate of the input image and adjusting the driving voltage to prevent flicker, while maintaining image resolution through proper shifting of pixel data and optical axis separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 3D cell is driven using AC voltage to prevent liquid crystal degradation, then image sticking is prevented, but kickback voltage varies causing flicker that degrades stereoscopic image quality
Solution Approach 1:
The patent applies periodic action by driving the 3D cell at a frame rate that is an integer multiple (2 times or more) of the display panel's frame rate. This creates a periodic driving pattern where the 3D cell completes multiple cycles within one display panel cycle, ensuring that kickback voltage variations occur at frequencies that do not synchronize with the display refresh, thereby preventing visible flicker while maintaining the benefits of AC voltage driving.
2Object-affected harmful factors
If the frame rate of the 3D cell is increased to prevent flicker, then stereoscopic image quality is improved, but power consumption and heat generation increase
Solution Approach 1:
The patent changes the frame rate parameter of the 3D cell to be an integer multiple of the display panel's frame rate. This parameter adjustment allows the system to operate at higher refresh rates for the 3D cell specifically, preventing flicker by desynchronizing kickback voltage variations from the display refresh cycle, while managing power consumption through optimized driving waveforms and voltage control.
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
Prevents flicker in the 3D cell, enhancing the stereoscopic image quality by ensuring the 3D cell operates at a higher frame rate than the display panel, thereby reducing the intensity of flicker and maintaining image resolution.
Implementation Method 1
a 3D cell which is positioned on the display panel or is embedded in the display panel and separates optical axes of the left eye image and the right eye image
Data Source
AI summary
An autostereoscopic display and a method for driving the same are discussed. The autostereoscopic display according to an embodiment includes a display panel displaying data of a left eye image and data of a right eye image and a three-dimensional (3D) cell which is positioned on the display panel or is embedded in the display panel and separates optical axes of the left eye image and the right eye image. A frame rate of the 3D cell is greater than a frame rate of the display panel.