Stereoscopic Display Power Control via Voltage Reduction
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Solution Overview
Problem
Stereoscopic display apparatuses consume excessive power during simultaneous shutter closure periods, even when no image is visible, due to the current image display control methods.
Innovation Solution
Incorporating organic electroluminescence (EL) devices with a switching device and control units to manage voltage reduction periods, allowing for a non-viewable period that is longer than the voltage reduced period, thereby reducing power consumption by adjusting the timing of shutter closure and voltage reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If image display control is performed during simultaneous shutter closure period, then image display continuity is maintained, but power consumption increases excessively
Solution Approach 1:
The patent applies periodic action by controlling the organic EL devices to enter a low-power state during the simultaneous shutter closure period when no image is visible. The display alternates between normal operation during viewable periods and power-reduced state during non-viewable periods, achieving energy savings while maintaining image display continuity during active periods.
Solution Approach 2:
The patent implements discarding and recovering by temporarily suspending image display during the simultaneous shutter closure period when both shutters are closed and no image can be seen. The display system recovers by resuming normal operation when the shutters open, allowing power consumption to be reduced during periods when image output is not needed while maintaining continuity when required.
2Use of energy by moving object
If voltage is reduced during non-viewable period, then power consumption is reduced, but delay periods affect timing precision
Solution Approach 1:
The patent applies preliminary action by generating the voltage reduction control signal in advance to account for the delay period. The control signal is timed to initiate voltage reduction before the actual luminance change occurs, ensuring that the voltage reduced period aligns with the non-viewable period despite the inherent delays in the system response.
Solution Approach 2:
The patent implements feedback by using the delay period information to adjust the timing of the voltage reduction control signal. The system compensates for the delay by advancing the control signal generation, creating a feedback loop that maintains precise timing alignment between voltage reduction and shutter closure states.
3Use of energy by moving object
If non-viewable period is longer than voltage reduced period, then power consumption is optimized, but image restoration timing must be precisely controlled
Solution Approach 1:
The patent applies preliminary action by generating the voltage restoration control signal in advance of the required image restoration. The control signal is timed to initiate voltage restoration before the end of the non-viewable period, accounting for system response delays and ensuring that luminance is fully restored by the time the shutters open and image viewing resumes.
Solution Approach 2:
The patent implements feedback by using timing information about the non-viewable period and shutter operation to precisely control the voltage restoration timing. The system monitors the period duration and adjusts the restoration signal timing accordingly, creating a feedback mechanism that ensures accurate image restoration synchronization.
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 power consumption by minimizing luminance during shutter closure periods and ensures quick restoration of luminance when images become viewable again, optimizing power usage in stereoscopic display systems.
Implementation Method 1
a plurality of organic electroluminescence (EL) devices included in a display unit of the image display unit
Data Source
AI summary
A stereoscopic display apparatus includes: a plurality of light-emitting devices; a power supply line for supplying current to the light-emitting devices; a switching device provided on the power supply line; a glasses control circuit which generates a glasses control signal for setting, in a pair of shutter-type glasses, a non-viewable period in which both the right-eye image and the left-eye image are made non-viewable at the same time; and a power supply control circuit which generates a device control signal for setting, in the switching device, a voltage reduced period in which the voltage between the electrodes in the light-emitting device is reduced, in which the glasses control circuit and the power supply control circuit control the shutter-type glasses and the switching device, respectively, for setting the non-viewable period to be a period at least from a start to an end of the voltage reduced period.