HDBaseT Receiver Circuit Switching for Multi-Standard Signal Reception
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Solution Overview
Problem
Existing image display apparatuses, such as projectors, can only receive and transmit HDBaseT signals if they are compliant with specific standards, limiting their ability to receive other signals like Ethernet, HDMI, and IR signals when only one RJ45 connector is provided, leading to incomplete functionality and inefficiency.
Innovation Solution
Incorporating an HDBaseT receiver circuit compliant with multiple standards and a dedicated receiver circuit for specific standards, along with a circuit switching unit to direct signal processing, allows for selective reception and processing of various signals regardless of transmitter specifications, reducing costs and power consumption by enabling standby modes and user-selectable output targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only one RJ45 connector for receiving HDBaseT signals is provided, then device complexity is reduced, but the ability to receive signals from transmitters compliant with different standards is limited
Solution Approach 1:
The receiver circuit is divided into two independent parts: a general HDBaseT receiver circuit that can receive multiple signal types, and a dedicated receiver circuit for specific signal standards. This segmentation allows each part to be optimized for its specific function while working together to provide comprehensive signal reception capability through a single RJ45 connector.
Solution Approach 2:
The HDBaseT receiver circuit is designed with universal functionality to receive signals based on multiple standards (HDMI, Ethernet, UART, IR) through a single interface. This multi-functional design eliminates the need for separate dedicated receivers for each signal type, reducing device complexity while maintaining broad adaptability.
2Reliability
If a dedicated receiver circuit for each signal standard is provided, then signal reception reliability is improved, but device complexity and cost increase
Solution Approach 1:
The receiver system is segmented into a general-purpose HDBaseT receiver circuit and specific dedicated receiver circuits for particular signal standards. This segmentation ensures that each signal type has a dedicated processing path for reliable reception, while the modular structure prevents exponential growth in device complexity.
Solution Approach 2:
Multiple dedicated receiver circuits are merged with the general HDBaseT receiver circuit through a circuit switching unit. This merging allows the system to maintain dedicated processing paths for reliability while sharing common infrastructure (RJ45 connector, power supply, control logic) to minimize overall device complexity.
3Adaptability or versatility
If multiple receiver circuits are provided for different signal standards, then adaptability is improved, but power consumption increases
Solution Approach 1:
The receiver circuits are configured to be dynamically activated or deactivated based on the detected signal type. The circuit switching unit selectively enables only the necessary receiver circuit and its associated processing units when a specific signal standard is detected, allowing the system to maintain adaptability while minimizing power consumption by keeping unnecessary circuits in a low-power or off state.
Data Source
AI summary
An image display apparatus includes: an HDBaseT receiver circuit that receives signals based on N (N is an integer number satisfying N≧2) standards that can be transmitted as HDBaseT signals; a dedicated receiver circuit that is compliant with only a first standard of the N standards and receives signals of the first standard; a signal processing unit that processes the signals received by the HDBaseT receiver circuit or the dedicated receiver circuit; and a circuit switching unit that switches an output target circuit that outputs the signals of the first standard to the signal processing unit to one of the HDBaseT receiver circuit and the dedicated receiver circuit.