Display Device Latency Reduction via Pixel Delay Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Digital display devices introduce latency in signal transmission, which can be bothersome in applications like video conferencing, where synchronized audio and video signals are crucial for a seamless user experience.
Innovation Solution
A display device with an input module, frame buffer, and controller that determines the frame rate and pixel delay, allowing for early transmission of pixels to the display module when the frame buffer contains a sufficient number of pixels, thereby reducing overall latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If digital signal processing is performed in display devices (encoding, decoding, compressing, decompressing, scaling, de-interlacing), then image quality and functionality are improved, but signal latency increases
Solution Approach 1:
The patent applies preliminary action by pre-processing and storing pixel data in frame buffers before display. The system performs scaling, de-interlacing, and other image processing operations in advance, storing the results in frame buffers. This allows the display to retrieve pre-processed data without performing time-consuming operations in real-time, thus maintaining image quality while reducing latency.
Solution Approach 2:
The patent uses frame buffers as intermediary storage between the signal processing components and the display output. These buffers act as mediators that decouple the processing rate from the display rate, allowing complex image processing to be performed without directly impacting the timing of the final display output, thus reducing overall system latency.
2Reliability
If frame buffers store complete image frames before transmission to display module, then image completeness is ensured, but display latency increases
Solution Approach 1:
The patent segments the image frame into individual pixels or pixel groups that can be processed and stored independently in the frame buffer. This segmentation allows the display system to transmit and display pixels as they become available in the buffer, rather than waiting for complete frames, thus maintaining image completeness while reducing display latency through progressive rendering.
Solution Approach 2:
The system performs preliminary action by pre-storing pixel data in frame buffers at different stages of processing. This allows the display module to retrieve and display pixels without waiting for complete frame processing, effectively breaking the dependency on complete frame storage while ensuring image integrity through the buffered data.
Data Source
Figure 1
Figure 2A~3
AI summary
A display device may reduce the latency of the display of a digital signal by reducing the latency that the display device adds to the digital signal. After a digital signal is received by an input module, the signal is stored in a frame buffer as a plurality of pixels. A controller determines the input frame rate of the digital signal and a pixel delay. The controller monitors the frame buffer to determine when the frame buffer has stored a number of pixels greater than or equal to the pixel delay. After the frame buffer contains enough pixels, the controller initiates transmission of the pixels from the frame buffer to a display module. In certain embodiments, the controller initiates transmission of the pixels to the display module before the frame buffer has stored all pixels corresponding to the frame.