Converter Switching Mode Control for Power Reduction
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Solution Overview
Problem
Image display apparatuses face increasing demands for reducing power consumption, especially as they grow in size, and existing technologies have not effectively addressed the need to minimize power consumption based on load conditions and image content.
Innovation Solution
An image display apparatus with a power supply that includes a converter with switching elements, which operates in two modes: a continuous switching mode and a mode where switching is temporarily stopped, depending on the load and image content, to reduce power consumption by minimizing switching losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the switching element performs switching operation continuously, then the power supply can meet high load demands, but power consumption increases due to continuous switching losses
Solution Approach 1:
The patent applies dynamics by making the switching operation adjustable rather than fixed. The controller dynamically switches between continuous switching mode (for high load) and intermittent switching mode (for low load), optimizing the balance between power supply capability and switching losses based on real-time load conditions.
Solution Approach 2:
The patent changes the switching parameter (continuous vs. intermittent operation) based on load conditions. When load is below a threshold, the switching element operates intermittently rather than continuously, changing the operational parameter to reduce switching losses while maintaining adequate power supply.
2Loss of energy
If the switching operation is stopped temporarily to reduce power consumption, then switching losses decrease, but the power supply capability is reduced
Solution Approach 1:
The system dynamically adjusts switching operation based on load demand. The controller monitors load conditions and switches between continuous and intermittent modes, ensuring power supply capability is maintained when needed while reducing switching losses when load is low.
Solution Approach 2:
The operational parameter of the switching element is changed from continuous to intermittent mode when load is below threshold. This parameter change reduces switching losses while the controller ensures power supply capability is adequate for the current load condition.
3Use of energy by stationary object
If the converter operates in intermittent mode, then power consumption is reduced, but the voltage stability may be affected
Solution Approach 1:
The controller uses feedback from load detection to determine when to switch between continuous and intermittent modes. This feedback mechanism ensures that intermittent operation only occurs when load is sufficiently low, maintaining voltage stability while reducing power consumption.
Solution Approach 2:
The system dynamically adjusts switching operation based on real-time load conditions. The controller monitors load and switches modes accordingly, ensuring voltage stability is maintained during intermittent operation by only allowing it when load conditions permit.
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
The solution effectively reduces power consumption by optimizing switching operations based on load and image content, leading to efficient power management and reduced energy usage without compromising circuit protection.
Implementation Method 1
a converter including at least one switching element and configured to output direct-current (DC) power by converting a level of input power based on a switching operation of the at least one switching element
Data Source
AI summary
Disclosed is an image display apparatus including: a display; and a power supply configured to supply power to the display; wherein the power supply comprises a converter including at least one switching element and configured to output direct-current (DC) power by converting a level of input power based on a switching operation of the at least one switching element, and wherein, a first mode where the at least one switching element performs a switching operation continuously or a second mode where the at least one switching element stops the switching operation are performed according to a load at an output terminal of the converter. Accordingly, power consumption required to display an image may be reduced.