Shared Video Output Transmitters for TMDS and LVDS Switching
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Solution Overview
Problem
Existing video processors in electronic devices face challenges in supporting multiple digital video interfaces like TMDS and LVDS to ensure compatibility with various LCD devices, requiring separate output units for different transmission modes, which increases chip area and complexity.
Innovation Solution
A multifunctional transmitter with N output units, each comprising a serializer and an output driver, is designed to select and convert video data between different transmission interfaces (such as LVDS and TMDS) based on a mode selection signal, sharing output units to reduce chip area and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate output units are provided for different transmission interfaces (TMDS and LVDS), then compatibility with various LCD devices is improved, but chip area and device complexity increase
Solution Approach 1:
The patent implements a unified output unit that can operate in multiple transmission modes (TMDS and LVDS) by configuring different numbers of lanes and adjusting serialization parameters. The same physical output unit dynamically adapts its functionality based on the selected transmission interface type, eliminating the need for separate dedicated output units for each interface standard.
Solution Approach 2:
The output unit dynamically reconfigures its operational parameters including the number of active lanes, serialization depth, and data encoding schemes based on the selected transmission mode. This dynamic adaptation allows a single static physical structure to serve multiple functional purposes across different transmission standards.
2Adaptability or versatility
If separate output units are provided for different transmission interfaces (TMDS and LVDS), then compatibility with various LCD devices is improved, but device complexity increases
Solution Approach 1:
The patent implements a unified output unit that can operate in multiple transmission modes (TMDS and LVDS) by configuring different numbers of lanes and adjusting serialization parameters. The same physical output unit dynamically adapts its functionality based on the selected transmission interface type, eliminating the need for separate dedicated output units for each interface standard.
Solution Approach 2:
The patent merges the functionality of separate TMDS and LVDS output units into a single unified output unit. By combining the lane configuration, serialization, and data transmission capabilities into one integrated structure, the patent reduces the overall device complexity while maintaining support for multiple transmission interfaces.
3Speed
If multiple lanes are used for high-speed transmission, then transmission speed is improved, but power consumption increases
Solution Approach 1:
The output unit dynamically reconfigures its operational parameters including the number of active lanes, serialization depth, and data encoding schemes based on the selected transmission mode. This dynamic adaptation allows a single static physical structure to serve multiple functional purposes across different transmission standards.
Data Source
AI summary
Multifunctional transmitters capable of transmitting signals of different specifications in different modes are provided, in which N output units are provided and each output unit comprises a serializer and an output driver. A control unit, according to a mode selection signal, selects a first set of output units from the N output units to transmit a first video data compatible with a first transmission interface under a first transmission mode and selects a second set of output units from the first set of output units to transmit a second video data compatible with a second transmission interface which is different from the first transmission interface under a second transmission mode.