Composite Video Signal Correction for LED Displays
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Solution Overview
Problem
Conventional pixel correction systems for electronic visual displays require individual correction of each pixel or module, which is inefficient and costly, and often impractical for large or inaccessible displays.
Innovation Solution
A video processing system that corrects composite streaming video signals using correction coefficients applied at the point of pulse-width modulation (PWM) for LED displays, allowing for centralized or remote processing and reducing the need for individual pixel corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual pixel correction is performed for each pixel or module, then display uniformity is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple individual pixel correction operations into a single composite video signal correction process. By merging the correction functions into centralized processing circuits that operate on the video signal before distribution to display modules, the system achieves uniform correction across all pixels without requiring separate correction mechanisms for each pixel or module.
Solution Approach 2:
The patent introduces composite video signal as an intermediary carrier that transports correction data from centralized processing circuits to display modules. This intermediary approach allows correction information to be distributed efficiently without requiring direct individual pixel access or complex point-to-point correction pathways.
2Reliability
If individual pixel correction systems are deployed, then display characteristics are improved, but maintenance difficulty and cost increase
Solution Approach 1:
The patent extracts the correction functionality from the display modules themselves and relocates it to separate, centralized processing circuits. This separation allows the correction system to be maintained, updated, or replaced independently from the display hardware, significantly easing maintenance operations for large or remotely located displays.
Solution Approach 2:
The centralized processing circuits are designed to handle correction for multiple display modules simultaneously through a single system. This universal correction approach allows one maintenance team or technician to service the entire correction system rather than requiring individual access to each display module, reducing overall maintenance complexity.
3Measurement precision
If correction systems are placed close to displays, then correction precision is improved, but accessibility for maintenance worsens
Solution Approach 1:
The patent segments the correction system into two distinct components: centralized processing circuits that perform the correction calculations, and display modules that receive the corrected video signal. This segmentation allows the processing circuits to be located in accessible positions for maintenance while still providing precise correction to displays that may be positioned remotely or in difficult-to-reach locations.
4Device complexity
If centralized video signal correction is used, then device complexity is reduced, but individual pixel correction precision may worsen
Solution Approach 1:
The patent employs parameter-based correction coefficients that are applied to the composite video signal to adjust display characteristics. By modifying signal parameters (brightness, contrast, color balance) through mathematical transformations of the video data, the system achieves precise pixel-level correction effects through centralized processing without requiring physically complex individual pixel adjustment mechanisms.
Data Source
AI summary
The present disclosure is directed to methods, systems, and apparatuses for modifying streaming video signals to be shown on a visual display. In one embodiment, a method includes receiving a streaming video signal with multiple display components. The method also includes isolating and transmitting the display components to a multiplier according to an associated clock signal for each of the display components. The method further includes fetching correction coefficients from a storage circuit. The correction coefficients correspond to individual display components. The method also includes presenting the correction coefficients to the multiplier along with the display components according to the associated clock signals, and adjusting the display components with the corresponding correction coefficients to form corrected display components of the streaming video signal. The method also includes collecting the adjusted display components into a corrected streaming video signal.