Wireless Graphics Card Using UWB OFDM for High-Bandwidth Video
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Solution Overview
Problem
Current technologies lack a wireless solution for transmitting high-bandwidth video signals from portable computers to display monitors, restricting mobility and flexibility in device placement due to the need for wired connections.
Innovation Solution
The implementation of an ultra-wideband (UWB) system with an orthogonal frequency-division multiplexing (OFDM) scheme, utilizing a wireless graphics card with a UWB chipset to wirelessly transmit video, audio, and data signals over short ranges, enabling communication between a portable computer and a display monitor via a wireless docking station or wireless docking monitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wired video interfaces (VGA, DVI, component analog video) are used to connect portable computers to display monitors, then video signal transmission quality is maintained, but device mobility and placement flexibility are restricted
Solution Approach 1:
The patent replaces the mechanical wired connection system (physical cables and connectors for VGA, DVI, or component analog video) with a wireless UWB-based electromagnetic transmission system. The wireless graphics card converts video signals into electromagnetic waves transmitted via UWB radio frequency, eliminating the need for physical connections while maintaining video quality and enabling device mobility.
2Ease of operation
If wireless technologies are used to transmit video signals from portable computers, then device mobility is improved, but data transmission bandwidth and signal stability are insufficient for high-resolution video
Solution Approach 1:
The patent changes the fundamental transmission parameters by using Ultra-Wideband (UWB) technology with bandwidth greater than 500 MHz per channel, compared to traditional narrowband wireless technologies. This parameter change enables the system to transmit high-bandwidth video signals (up to 1 Gbps) while maintaining stability through the wideband spectrum's resistance to interference and available channels.
Solution Approach 2:
The patent segments the UWB frequency spectrum into multiple available channels, each with bandwidth greater than 500 MHz. This segmentation allows the system to distribute video data across multiple frequency channels, improving signal stability through frequency diversity and reducing the impact of interference on any single channel.
3Ease of operation
If existing wireless technologies are used for video transmission, then ease of connection is improved, but interference from other wireless devices increases
Solution Approach 1:
The patent transitions from narrowband wireless communication to wideband UWB communication, expanding the frequency dimension from traditional limited bandwidth to over 500 MHz per channel. This dimensional expansion provides a much larger spectral resource space that is less susceptible to interference from other wireless devices operating at traditional frequencies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides high-speed data transmission (up to 1 Gbps) with reduced interference, allowing for flexible placement of display monitors and supporting high-resolution video (up to 2560×1600) while being robust to interference and requiring low power, with the ability to adjust refresh rates based on transmission range.
Implementation Method 1
an ultra wideband (UWB) chipset coupled to the connector for processing the plurality of signals and for generating an OFDM modulated signal that includes at least the video signal
Data Source
AI summary
A device is provided for use in a portable computer. The device includes a wireless graphics card that includes a connector for coupling to an expansion slot of the portable computer and for receiving a plurality of signals from the portable computer, the plurality of signals including video, audio, and data signals and an ultra wideband (UWB) chipset coupled to the connector for processing the plurality of signals and for generating an OFDM modulated signal that includes at least the video signal, where the OFDM modulated signal including the video signal is wirelessly transmitted over an UWB link to a monitor for display.