3D Display Control Device Sub-Frame Segmentation Ghost Imaging
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Solution Overview
Problem
Traditional shutter glass mechanisms for 3D displays on non-CRT devices, such as LCDs and OLEDs, result in ghost imaging due to simultaneous display of mixed left-eye and right-eye frames, leading to poor viewing quality, and extending the vertical blanking interval to address this issue is not compatible with current standards, increasing design complexity and production costs.
Innovation Solution
A control device with an image processor and timing signal generator generates additional output frames that combine parts of left-eye and right-eye frames, allowing the shutter glasses' lenses to be opaque or non-opaque at specific times, increasing the display frequency to enhance perception time without extending the vertical blanking interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traditional lens control mechanism is adopted for LCD/OLED display devices, then the display device can maintain simple structure, but ghost imaging occurs due to simultaneous display of mixed left-eye and right-eye frames
Solution Approach 1:
The patent segments the image frame into multiple sub-frames (first sub-frame, second sub-frame, third sub-frame) with different eye-specific content. By controlling the shutter glasses lenses to be non-opaque during specific time intervals corresponding to different sub-frames, the system prevents mixed frame perception while maintaining simple display hardware architecture.
Solution Approach 2:
The patent dynamically adjusts the timing of lens transparency changes based on the refresh rate and frame structure. The control device adjusts when lenses become non-opaque to coincide with specific sub-frame display periods, creating adaptive synchronization between display output and lens control without requiring hardware complexity.
2Duration of action of moving object
If the vertical blanking interval is extended to enhance brightness and perception time, then viewer perception quality improves, but compatibility with current display standards is lost and design complexity increases
Solution Approach 1:
Instead of extending the vertical blanking interval, the patent segments the active display period into multiple sub-frames with different eye-specific content. This allows the system to maintain standard-compliant timing while achieving longer effective perception time through the segmented frame structure and coordinated lens control.
Solution Approach 2:
The control device preliminarily determines the timing intervals for lens transparency changes based on the display refresh rate and frame structure. By pre-calculating when lenses should become non-opaque relative to sub-frame display periods, the system achieves extended perception time without requiring standard extensions or complex redesigns.
3Ease of manufacture
If image data is sequentially refreshed on pixels, then the display device can use standard refresh mechanisms, but both eyes perceive mixed frames causing ghost imaging
Solution Approach 1:
The patent segments the sequential refresh process into distinct phases where different eye-specific image data is displayed during different time intervals. By coordinating lens control with these segmented refresh phases, the system maintains simple sequential refresh implementation while preventing mixed frame perception through temporal separation of left-eye and right-eye content.
Data Source
AI summary
A control device for three dimensional display has an image processor and a timing signal generator. The image processor is used for receiving a first and a second input image signals to generate a first, a second, and a third output image signals. The first output image signal comprises part of the first input image signal. The second output image signal comprises part of the first input image signal and part of the second input image signal. The third output image signal comprises part of the second input image signal. The timing signal generator is used for generating a first lens control signal for configuring a first lens to be non-opaque when the second output image signal is displayed on a display device, and generating a second lens control signal for configuring a second lens to be non-opaque when the third output image signal is displayed on the display device.