Display Device Standby Power Feeding and Fan Control
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Solution Overview
Problem
Existing display devices consume excessive power in standby mode due to continuous high power feeding to external devices, which is inefficient and can lead to increased energy costs and potential device breakdowns.
Innovation Solution
Implementing a power control method that reduces power feeding to external devices from a first amount in operating state to a second, lower amount in standby state, along with adjusting cooling fan rotational frequency accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display device feeds electrical power to the image supply device with a high power feeding amount in standby state, then the image supply device can maintain operational readiness, but the display device cannot reduce power consumption in standby state
Solution Approach 1:
The patent applies dynamics by making the power feeding amount adjustable based on the display device's operational state. The power feeding circuit dynamically changes the power feeding amount between a first power feeding amount (higher) when the display device is operating and a second power feeding amount (lower) when in standby state, allowing the system to adapt power delivery to actual needs while maintaining image supply device functionality.
Solution Approach 2:
The patent implements parameter changes by modifying the power feeding amount parameter according to the display device's state. The processor controls the power feeding circuit to change the power feeding amount from a higher value during operation to a lower value during standby, thereby reducing power consumption while preserving the image supply device's ability to resume operation quickly.
2Productivity
If the display device continuously feeds high power to the image supply device, then the image supply device remains fully operational, but unnecessary power usage increases and device lifespan decreases
Solution Approach 1:
The patent applies partial action by providing only the necessary amount of power to the image supply device during standby state rather than continuous full power. The power feeding circuit delivers a reduced second power feeding amount during standby, which is sufficient to maintain basic operational readiness without the excessive power delivery that would waste energy and reduce device lifespan.
3Temperature
If the cooling fan operates at high rotational frequency in standby state, then cooling performance is maintained, but noise increases and power consumption rises
Solution Approach 1:
The patent applies dynamics by making the cooling fan's rotational frequency adjustable based on the display device's operational state. The controller dynamically changes the rotational frequency between a first rotational frequency (higher) when the display device is operating and a second rotational frequency (lower) when in standby state, thereby reducing noise and power consumption while maintaining adequate cooling performance for the reduced power generation in standby.
Data Source
AI summary
A method of controlling a display device includes feeding electrical power to an image supply device coupled to a first terminal configured to feed the electrical power and provided to the display device via the first terminal with a first power feeding amount when the display device is in an operating state, and feeding the electrical power to the image supply device via the first terminal with a second power feeding amount smaller than the first power feeding amount when the display device is in a standby state.