Wireless Display Antenna Switching for Low-Power Signal Reception
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Solution Overview
Problem
Conventional wireless display systems face challenges in reducing power consumption, particularly due to the need to adjust data transmission or lower screen brightness, which results in image quality deterioration and insufficient reduction in power consumption of wireless communication devices.
Innovation Solution
The system adjusts the number of activated antennas based on the distance between the transmitting and receiving devices, minimizing power consumption by turning off unnecessary antennas when a viewer is absent and optimizing antenna usage according to the signal-to-noise ratio and distance between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of activated antennas is increased to improve signal reception quality, 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 distance measurements. When the transmitting device is far away or signal quality is poor, more antennas are activated to improve reception. When the device is close or signal is strong, fewer antennas are activated to save power. This dynamic adaptation resolves the contradiction between maintaining reliable signal reception and minimizing power consumption.
Solution Approach 2:
The system changes the operational parameter (number of activated antennas) based on environmental conditions such as distance and signal-to-noise ratio. By measuring these parameters and adjusting antenna activation accordingly, the system optimizes the balance between reception quality and power consumption, avoiding both over-activation (wasting power) and under-activation (poor reception).
2Use of energy by moving object
If antenna power is reduced to decrease power consumption, then energy usage is lowered, but signal reception reliability deteriorates
Solution Approach 1:
Rather than using a fixed low power setting, the system dynamically adjusts antenna activation based on measured signal conditions. When reception quality is sufficient, power is reduced by deactivating unnecessary antennas. When signal quality degrades (e.g., increased distance), the system activates more antennas to maintain reliability. This dynamic approach resolves the contradiction by adapting power usage to actual needs.
Solution Approach 2:
The system implements feedback mechanisms where signal quality metrics (such as SNR measurements) are continuously monitored and used to adjust antenna activation. This closed-loop control ensures that power consumption is minimized only when signal conditions permit, automatically increasing power usage when reception quality would otherwise deteriorate, thus resolving the contradiction between power savings and reliability.
3Use of energy by moving object
If data compression ratio is increased to reduce transmitted data amount, then power consumption is reduced, but image quality deteriorates
Solution Approach 1:
The patent separates the power consumption problem into two independent components: transmission power (handled by compression) and reception power (handled by antenna activation). This segmentation allows the system to address reception power consumption through intelligent antenna selection without necessarily increasing compression ratios, thereby avoiding image quality deterioration while still achieving power savings through targeted antenna deactivation.
4Use of energy by moving object
If screen brightness is reduced to indirectly reduce power consumption, then energy usage is lowered, but image quality for the user deteriorates
Solution Approach 1:
The patent distinguishes between display power consumption (screen brightness) and communication power consumption (antenna operation). By segmenting these separate power consumption sources, the system can reduce communication power through intelligent antenna management without affecting display quality, thereby achieving power savings that do not compromise the user's visual experience.
Data Source
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.