Wireless Display Antenna Control for Low-Power Signal Reception
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Solution Overview
Problem
Conventional wireless display systems face challenges in reducing power consumption without compromising image quality, as they often rely on data compression or reduced screen brightness, which can lead to unnecessary power consumption when a viewer is absent.
Innovation Solution
Adjust the number of activated antennas based on the distance between the transmitting and receiving devices and detect viewer absence to minimize power consumption by activating only the necessary antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of activated antennas is increased to improve signal reception, then reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of activated antennas based on real-time signal conditions and viewer presence detection. When signal quality is sufficient or no viewer is detected, fewer antennas are activated to reduce power consumption. When signal quality degrades or viewers are present, more antennas are activated to maintain reliability.
Solution Approach 2:
The system changes the operational parameter of antenna quantity based on environmental conditions. By monitoring signal-to-noise ratio, packet error rate, and viewer presence, the system adjusts the number of active antennas to optimize the balance between reception reliability and power consumption.
2Use of energy by moving object
If data compression ratio is increased to reduce power consumption, then energy use is reduced, but image quality deteriorates
Solution Approach 1:
The system extracts and addresses the root cause of unnecessary power consumption - idle antenna operation when no viewers are present. By detecting viewer absence and deactivating antennas, the system achieves power savings without compromising image quality during actual viewing, unlike compression methods that inherently degrade quality.
3Use of energy by moving object
If screen brightness is reduced to reduce power consumption, then energy use is reduced, but image quality deteriorates
Solution Approach 1:
The system removes the need for image quality compromise by targeting a different power consumption source - the antennas. By detecting viewer presence and adjusting antenna activation accordingly, the system achieves power savings independent of image display parameters, maintaining full image quality when viewers are present.
4Reliability
If all antennas are activated continuously to ensure reliable reception, then reliability is improved, but power consumption increases unnecessarily when no viewer is present
Solution Approach 1:
The system implements periodic viewer presence detection and antenna activation adjustment. Instead of continuous full antenna operation, the system periodically checks for viewer presence and adjusts antenna activation accordingly, achieving reliable reception only when needed while minimizing power consumption during absence.
Solution Approach 2:
The system uses its own viewer detection capability to automatically control antenna activation. The A/V receiving device itself detects viewer presence and makes decisions about antenna activation without external intervention, enabling automatic power management that maintains reliability when needed.
Data Source
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AI summary
An Audio/Video (A/V) receiving device may include a display, a Radio Frequency (RF) receiving module configured to receive an RF packet from an A/V transmitting device, the RF receiving module including a plurality of antennas, and a microcomputer configured to obtain a distance between the A/V transmitting device and A/V receiving device and when the obtained distance is changed, display a first message indicating that a number of antennas to be turned among the plurality of antennas is changed according to the change of the distance.