HDMI Power State Detection for Accurate TV Device Synchronization
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Solution Overview
Problem
Existing power synchronization between TVs and HDMI devices often fails due to inaccurate real-time identification of the power state of the HDMI device, leading to unnecessary power control and inefficiencies.
Innovation Solution
An electronic device with an HDMI connector and processing circuitry to identify the power state of an external device using multiple signals, including HDMI hot plug and CEC communication, to ensure accurate power synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If power synchronization function is implemented between TV and HDMI device, then device management convenience is improved, but power state identification accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting the HDMI device's power state at specific time points before and after the TV's power state changes. The system performs power state detection at a first time point before power synchronization control is executed, and at a second time point after execution. This preliminary detection mechanism ensures that the system has accurate information about the HDMI device's actual power state before making control decisions, thereby improving power state identification accuracy while maintaining the convenience of power synchronization functionality.
2Device complexity
If power synchronization control is executed without accurate power state identification, then device control simplicity is improved, but unnecessary power control operations increase
Solution Approach 1:
The patent implements feedback by continuously monitoring the HDMI device's power state through the HDMI connector and using this information to adjust power synchronization control. The system receives power state information from the HDMI device and uses this feedback to determine whether power synchronization should be executed. This feedback mechanism prevents unnecessary power control operations by ensuring that the system only performs synchronization when the HDMI device is actually in a state that requires control, thereby reducing energy waste while maintaining simple control operations.
3Measurement precision
If power state detection is performed continuously, then power state identification accuracy is improved, but processing time and energy consumption increase
Solution Approach 1:
The patent applies periodic action by performing power state detection at specific intervals rather than continuously. The system detects power state at a first time point before power synchronization control and at a second time point after execution. This periodic detection approach maintains accurate power state identification while reducing processing time and energy consumption compared to continuous monitoring, as the system only performs detection when necessary based on the power synchronization control timeline.
Data Source
AI summary
An electronic device comprises: a high-definition multimedia interface (HDMI) connection unit for connecting the electronic device and an external electronic device by wire and including a first pin and a second pin; a memory including a power indicator identified on the basis of an electrical signal received through the first pin and indicating a power state of the external electronic device; and at least one processor connected to the HDMI connection unit and the memory, configured to: identify a first power state of the external electronic device based on a first power indicator identified at which a first time has elapsed after booting of the electronic device, determine whether the external electronic device is a first type device supporting HDMI-CEC communication through the second pin in response to identifying that the first power state is the first state, obtain first power state information from the external electronic device through the second pin in response to determining that the external electronic device is the first type device, and determine a final power state of the external electronic device based on the first power state information.