Power Management Circuit for Instant TV Turn-On
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Solution Overview
Problem
Televisions in commercial environments, such as hotels, take too long to turn on from a standby state, leading to customer complaints and increased energy consumption.
Innovation Solution
A power management circuit that selectively alternates a television between powered ON, power standby, and no/low power states, allowing for instant on capabilities while maintaining energy savings by controlling video, audio, and lighting elements, and using sensors and business logic to manage power states based on occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the television charges from a standby state to conserve energy, then energy consumption is reduced, but the turn-on time increases to 4-20 seconds
Solution Approach 1:
The system performs preliminary action by maintaining the television in a standby state with critical subsystems pre-charged and ready, rather than fully powering down. This allows the display to reach operational state quickly (within 1 second) while still consuming minimal power during idle periods, resolving the contradiction between energy conservation and fast turn-on time
Solution Approach 2:
The patent implements dynamic power management by selectively controlling different subsystems (display, audio, processor) to enter different power states based on operational needs. The display can be quickly activated from a low-power state while other components remain in deeper sleep modes, achieving both energy efficiency and rapid responsiveness
2Loss of time
If the television remains in powered ON state to provide instant image, then turn-on time is reduced to less than one second, but energy consumption increases
Solution Approach 1:
The television system is segmented into independent controllable subsystems (display, audio, processor, memory). Each subsystem can be independently powered or placed in low-power state, allowing the display to be quickly activated without requiring full system power-on, thus achieving fast turn-on with minimal energy consumption
Solution Approach 2:
The system dynamically changes power parameters (voltage, current, clock frequency) for different subsystems based on operational state. During standby, critical subsystems maintain elevated power levels ready for instant activation, while non-critical subsystems operate at minimal power levels, optimizing the balance between response time and energy consumption
Data Source
AI summary
A system and circuit for television power state control are disclosed. In one embodiment, a power management circuit communicatively controls television or set-top box components including a signal processing circuitry, a screen, and a visual indicator. The power management circuit selectively alternates the television between three states: powered ON/operating state (first state); power standby state (second state); and no/low power state (third state). Utilized with a television in a commercial or residential application, the system and circuit are employed to provide accelerated turn-on time to receive an image for user interaction, while providing sufficient control to maintain energy power savings.