Parallax Adjuster Flicker Reduction via Local Voltage Control
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Solution Overview
Problem
Display devices employing eye tracking with a parallax barrier method often experience flicker due to differences in the rising and falling speeds of liquid crystals, which affects brightness and user perception.
Innovation Solution
A display device with a parallax adjuster comprising multiple unit areas, a controller for eye position detection, and a coupling unit providing a certain resistance value between conductors to manage light transmission states, reducing the flicker by ensuring consistent pixel display for both eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parallax barrier method is used for eye tracking display, then stereoscopic image display is achieved, but flicker occurs due to difference between rising speed and falling speed of liquid crystal
Solution Approach 1:
The patent applies different voltage values to different unit areas of the barrier unit. Specifically, a first voltage value is applied to a first unit area and a second voltage value is applied to a second unit area, creating local quality differences that compensate for the liquid crystal's asymmetric response characteristics and reduce flicker
Solution Approach 2:
The patent changes the voltage parameter applied to different unit areas of the liquid crystal layer. By applying different voltage values (first voltage value and second voltage value) to different unit areas, the patent adjusts the light transmission characteristics locally to compensate for rising/falling speed differences and eliminate flicker
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
The solution effectively reduces flicker and enhances the display's brightness stability, providing a more seamless three-dimensional image experience by synchronizing light transmission and blocking operations across the display unit.
Implementation Method 1
a coupling unit that electrically couples the conductors together, the coupling unit providing a certain resistance value between the conductors
Data Source
AI summary
According to an aspect, a display device includes a display unit, a parallax adjuster that includes a plurality of unit areas, a controller that detects positions of a right eye and a left eye of a user, determines a pixel display of pixels of a right eye image and a left eye image, and sets a light transmission state to the unit areas in accordance with the positions of the right eye and the left eye and the pixel display; a plurality of conductors that are provided corresponding to the respective unit areas and each of which applies a signal to set the light transmission state of the unit area to the corresponding unit area; and a coupling unit that electrically couples the conductors together, the coupling unit providing a certain resistance value between the conductors.