Shutter Control for Frame Sequential Stereoscopic Display
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Solution Overview
Problem
Existing frame sequential-type stereoscopic display methods face challenges in ensuring sufficient brightness and preventing the mixing of left-eye and right-eye images, leading to difficulties in clear stereoscopic viewing due to limited viewing periods and potential resolution loss.
Innovation Solution
An electro-optical device with a shutter control system that alternates right and left unit periods, using a plurality of pixel circuits and driving circuits to manage shutter states and gradation potentials, ensuring both shutters are closed during image update periods to prevent mixing and improve brightness by shortening image update durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If both shutters are closed during the entire image update period to prevent mixing of left-eye and right-eye images, then the mixing of images is suppressed, but the viewing period is reduced leading to insufficient brightness
Solution Approach 1:
The image update period is divided into two distinct phases: a first half period where both shutters are closed to prevent image mixing, and a second half period where the appropriate shutter is opened to allow viewing. This segmentation resolves the contradiction by separating the image writing process from the display process in time, ensuring both image purity and brightness are maintained.
Solution Approach 2:
The system employs periodic switching of shutter states synchronized with the frame sequential display method. During each frame period, the shutters alternately open and close in a periodic manner - closed during image update, opened during display - creating a rhythmic pattern that simultaneously prevents mixing and ensures sufficient viewing brightness.
2Manufacturing precision
If the image update period is extended to ensure complete writing of gradation potentials to all scanning lines, then the image quality is maintained, but the display period is reduced leading to lower brightness
Solution Approach 1:
The system performs preliminary action by completing the writing of gradation potentials to all scanning lines during the first half period before the display period begins. This ensures that when the shutters open in the second half period, the image is already fully written and ready for immediate display, maintaining both image quality and brightness.
Solution Approach 2:
The system dynamically adjusts the timing and duration of the image update period based on the display requirements. By making the image update period variable and synchronizing it with the shutter control, the system can optimize the balance between completing image writing and providing sufficient display time, thereby maintaining both precision and brightness.
Data Source
AI summary
A right unit period corresponding to a right-eye image and a left unit period corresponding to a left-eye image are set alternately. The scanning line driving circuit selects the plurality of scanning lines in several units at each right unit period, the glasses control circuit controls both of the shutter for the right eye and the shutter for the left eye to be in the closed state at least a portion of an image update period at which the data line driving circuit supplies a gradation potential corresponding to the right-eye image to each data line and the glasses control circuit controls the shutter for the right eye to be in the opened state and controls the shutter for the left eye to be in the closed state at the display period after the lapse of the image update period.