3D Display Shutter Backlight Timing for Luminance and Power
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Solution Overview
Problem
Conventional stereoscopic image display devices using shutter glasses suffer from luminance deterioration, noticeable flicker from external light sources, and user eye fatigue due to prolonged use, as well as increased power consumption.
Innovation Solution
A stereoscopic image display device with a shutter member comprising left-eye and right-eye shutters that alternate their open and closed states during the input periods of left-eye and right-eye image data, utilizing a backlight with distinct pulse magnitudes and timing to optimize luminance and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shutter glasses are used to display stereoscopic images, then the stereoscopic effect is achieved, but luminance deterioration and flicker occur
Solution Approach 1:
The backlight is turned on before the shutter closes in advance, ensuring that sufficient light is emitted during the shutter transition period. This preliminary action prevents luminance deterioration and flicker that would occur if the backlight were turned on only after the shutter closes.
Solution Approach 2:
The patent dynamically controls the backlight timing relative to the shutter state, turning the backlight on before the shutter closes and turning it off after the shutter opens. This dynamic coordination between backlight and shutter ensures optimal luminance while maintaining the stereoscopic effect.
2Reliability
If shutter glasses are worn for extended periods, then stereoscopic image display is maintained, but user eye fatigue increases
Solution Approach 1:
The shutter remains open during the entire image input period, ensuring continuous light transmission and preventing the eye from adapting to dark conditions. This continuous action eliminates the need for the eye to adjust between light and dark states, reducing fatigue during extended viewing.
Solution Approach 2:
The backlight is activated before the shutter closes, ensuring the display area remains brightly illuminated throughout the image display period. This preliminary lighting action prevents the eye from experiencing sudden darkening, reducing strain and fatigue during prolonged use.
3Productivity
If conventional shutter timing is used, then image data is displayed, but power consumption increases
Solution Approach 1:
The backlight is turned on periodically in sync with the shutter timing - specifically turned on before the shutter closes and turned off after the shutter opens. This periodic action ensures the backlight operates only when necessary, reducing overall power consumption while maintaining effective image display.
Solution Approach 2:
The patent changes the timing parameters of the backlight operation relative to the shutter state. By adjusting the backlight on/off timing to coincide with shutter transitions, the system achieves both effective image display and reduced power consumption through optimized parameter coordination.
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 prevents luminance deterioration, reduces flicker from external light sources, decreases user eye fatigue, and lowers power consumption while maintaining effective stereoscopic image display.
Implementation Method 1
the left-eye shutter and the right-eye shutter may respectively further include a liquid crystal material
Data Source
AI summary
A stereoscopic image display device includes; a display device into which left-eye image data and right-eye image data are alternately input, and a shutter member including a left-eye shutter and a right-eye shutter, wherein the left-eye shutter and the right-eye shutter are opened in at least one of at least a part of an input period for the left-eye image data and at least a part of an input period for the right-eye image data.