Display Controller Resolution Division for Single-Cable Multi-Frame PBP
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Solution Overview
Problem
Current display technologies require multiple video cables for Picture by Picture (PBP) mode, leading to image distortion due to mismatched video stream resolutions, as both video connection ports record the native resolution of the display, causing the displayed frames to be compressed and distorted.
Innovation Solution
A method that uses a single video cable to transmit multiple video streams by dividing the original display resolution into adjusted resolutions based on the number of frames and display mode, with the display controller communicating these adjustments to the source device via Extended Display Identification Data (EDID), allowing the source device to adjust the video streams accordingly, thereby preventing image distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple video cables are connected to transmit video streams for PBP mode, then the display can show multiple frames simultaneously, but the wiring becomes complex and inconvenient for users
Solution Approach 1:
The patent combines multiple video stream transmissions into a single cable connection. The display controller receives multiple video streams through one video cable and distributes them to different display regions, eliminating the need for multiple separate video cables and simplifying the wiring setup while maintaining PBP functionality
Solution Approach 2:
The single video cable connection is designed to handle multiple video streams simultaneously. The display controller universally processes multiple video streams through a single input interface, making the system more versatile and easier to use compared to requiring separate cables for each video stream
2Manufacturing precision
If the display uses native resolution from EDID for video streams, then the source device can provide conforming video streams, but the displayed frames become compressed and distorted when showing multiple frames
Solution Approach 1:
The patent dynamically adjusts the resolution of video streams based on the actual display mode and number of frames being shown. Instead of using a fixed native resolution from EDID, the display controller modifies the resolution parameters in real-time to match the required display configuration, preventing compression and distortion while maintaining proper aspect ratios
Solution Approach 2:
The system changes the resolution parameters of video streams according to the display mode (e.g., PBP, PIP, POP) and the number of frames being displayed. The display controller adjusts width, height, and aspect ratio parameters dynamically to ensure that each video stream matches the actual display region requirements, eliminating frame distortion
Data Source
AI summary
A display and a method for displaying multiple frames thereof are provided. In the method, a source device is connected by a video cable. A multiple frame displaying request sent by the source device is received through the video cable. Then, an original resolution of the display is divided into several adjusted resolutions according to the number of frames in the request, and at least one resolution data respectively recording the adjusted resolutions is sent to the source device. At least one video stream sent by the source device is received through the video cable, and frames of the at least one video stream are respectively displayed on at least one corresponding display region of the display.