3D Frame Rate Conversion Apparatus Preventing Frame Tearing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing frame rate conversion technologies for 3D stereo displays fail to preserve the alternate display of left and right frames, leading to undesirable effects when the output frame rate exceeds or is less than the input frame rate, causing frame tearing and disrupting the intended 3D image display.
Innovation Solution
A frame rate conversion apparatus and method that includes a storage unit, an input controller, and an output controller, which alternately output left and right frames from a storage unit according to the output frame rate and associated frame information, ensuring that left and right frames are displayed alternately while preventing frame tearing by selectively using previously inputted frame buffers for output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frames are outputted by following the order of input frames to avoid frame buffer conflicts, then frame tearing is avoided, but the alternate display order of left and right frames is disrupted
Solution Approach 1:
The patent implements dynamic frame buffer selection where the output controller adaptively chooses different frame buffers based on real-time conditions. When the output frame rate exceeds the input frame rate, the system dynamically selects from multiple available frame buffers (buf0, buf1, buf2, buf3) to maintain both frame tearing prevention and correct left/right frame alternation, rather than following a fixed output order
Solution Approach 2:
The system employs feedback mechanisms where the output controller monitors the state of frame buffers and adjusts its selection strategy accordingly. By detecting which frame buffers are available and their current content status, the controller makes informed decisions to preserve both the no-frame-tearing condition and the alternate left/right frame display sequence
2Productivity
If the output frame rate is increased to improve display smoothness, then display quality is improved, but frame tearing occurs when output catches up with input
Solution Approach 1:
The patent divides the frame buffer resources into multiple segmented buffers (buf0, buf1, buf2, buf3) that can be independently managed. This segmentation allows the system to handle high output frame rates by distributing frame storage across multiple buffers, preventing the output from catching up to and conflicting with the input stream, thereby eliminating frame tearing while maintaining high display smoothness
3Productivity
If frame buffers operate in cyclic manner to improve storage efficiency, then storage utilization is improved, but frame tearing occurs when input catches up to output
Solution Approach 1:
The patent maintains the cyclic operation of frame buffers for storage efficiency but introduces dynamic control logic that adapts the cyclic progression based on real-time input/output rate differences. When input catches up to output, the system dynamically adjusts buffer selection and progression to prevent conflicts, ensuring both efficient cyclic storage utilization and frame tearing prevention
Data Source
AI summary
A frame rate conversion apparatus for 3D display is provided. The frame rate conversion apparatus for 3D display is capable of preserving alternate display of left and right frames while also preventing an issue of frame tearing. The frame rate conversion apparatus includes a storage unit, an input controller and an output controller. The input controller inputs an input frame sequence to the storage unit according to an input frame rate. The input frame sequence includes a plurality of frame pairs each having a left frame and a corresponding right frame. The output controller alternately outputs one of the left frames and one of the right frames from the storage unit according to an output frame rate and left/right frame information associated with the frame pairs in the storage unit to form an output frame sequence.