Segmented Shutter Glasses for 3D Display Brightness
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Solution Overview
Problem
Existing 3D display systems using shutter glasses suffer from a decrease in brightness due to short periods of visual recognition, leading to reduced image quality and increased crosstalk between left and right eye images.
Innovation Solution
The implementation of light selectors in shutter glasses that switch between light transmitting and blocking states along a vertical direction, synchronized with the line sequential drive of the image display apparatus, allowing for extended visual recognition periods while minimizing crosstalk by using liquid crystal materials and strategically positioned electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the shutter glasses use a liquid crystal shutter that switches between light transmitting and blocking states, then the viewer can stereoscopically view images, but the visual recognition period is shortened leading to decreased brightness
Solution Approach 1:
The liquid crystal shutter is divided into multiple independently controllable regions corresponding to different scan line ranges. Each region can switch between light transmitting and blocking states independently, allowing the shutter to display different images to the left and right eyes simultaneously while extending the visual recognition period through sequential scanning.
Solution Approach 2:
The shutter operates using a line sequential drive scheme where image data is written along scan lines in periodic vertical scan periods. The shutter switches between light transmitting and blocking states in synchronization with the periodic updating of images, allowing alternating display of left-eye and right-eye images while maintaining extended visual recognition through the periodic nature of the scanning process.
2Reliability
If the shutter switches states only during specific vertical scan periods, then images for left and right eyes are displayed alternately, but crosstalk occurs during image update transitions
Solution Approach 1:
The liquid crystal shutter is segmented into multiple independently controllable regions that can be switched independently. This allows the shutter to maintain different states for different portions of the display area during image updates, preventing crosstalk by ensuring that the eye not currently viewing an image receives a blocked signal while the other eye views the active image.
Solution Approach 2:
The shutter control is synchronized with the image data writing process, switching the light transmitting and blocking states in advance of image updates. This preliminary action ensures that the shutter is already in the correct state when image updates occur, preventing crosstalk during transitions between left-eye and right-eye images.
3Duration of action of moving object
If the entire image area is updated alternately between left and right eye images, then stereoscopic viewing is achieved, but the period for visual recognition of each image is shortened
Solution Approach 1:
The display area is segmented into multiple regions that can be updated sequentially rather than simultaneously. The line sequential drive scheme divides the image updating process into discrete scan line segments that are updated in order, allowing the shutter to extend the visual recognition period for each eye by displaying images sequentially across the segmented regions rather than requiring simultaneous full-image updates.
Solution Approach 2:
The line sequential drive scheme provides continuous useful action by continuously scanning and updating image data across all scan lines without interruption. The shutter maintains continuous visual recognition by ensuring that at any given moment, at least one eye is receiving a valid image while the other eye's image is being updated, eliminating dead time and maintaining continuous stereoscopic viewing.
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 configuration enhances the brightness of recognized images and reduces crosstalk, allowing for prolonged visual recognition of left and right eye images without mixing, thereby improving the overall image display quality.
Implementation Method 1
Each of the light selectors includes a first substrate, a second substrate, and a liquid crystal material sealed and encapsulated between the first substrate and the second substrate
Data Source
AI summary
A pair of shutter glasses capable of reducing decrease in brightness of displayed images to be visually recognized is provided. A pair of shutter glasses include a pair of light selectors the state of each of which is switched between a light transmitting state in which the light selector transmits light and a light blocking state in which the light selector blocks light. When a full area where light is transmitted or blocked in the light transmitting state or the light blocking state is virtually divided into a plurality of divided areas along a first direction, each of the light selectors switches the state of each of the plurality of divided areas between the light transmitting state and the light blocking state sequentially along the first direction.