Audible State Indication for Television Receiver Power-On
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Solution Overview
Problem
Modern flat-panel TV receivers experience delayed response times during power-on, leading to uncertainty about the device's state, as visual indicators can be difficult to see in ambient light and may cause audio-video crosstalk issues.
Innovation Solution
A circuit that audibly indicates the TV receiver's state during power-on using stored digital audio files played through a speaker, eliminating confusion and avoiding visual indicator limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual indicators (LED) are used to indicate TV receiver state, then state indication is provided, but visibility is poor in ambient light and distance
Solution Approach 1:
The patent replaces the visual indicator system (LED) with an acoustic indicator system (speaker). The controller outputs audio signals through the speaker to indicate the TV receiver's state, substituting the mechanical/optical detection mechanism with an acoustic one. This resolves the visibility problem because audio signals can be detected clearly even in ambient light conditions and at distances where visual indicators become indistinct.
2Loss of information
If broadcast audio is applied to speaker during power-on, then state indication is provided, but audio-video crosstalk causes rolling artifacts
Solution Approach 1:
The patent extracts the audio indication function from the broadcast audio signal path. Instead of using the broadcast audio that causes crosstalk, the system uses a separate audio output path controlled by the controller. The controller selectively outputs indication sounds through the speaker independent of the video signal processing, thereby eliminating the harmful crosstalk effect while maintaining clear state indication.
Solution Approach 2:
The patent introduces an intermediary control mechanism (the controller) between the audio output and the speaker. The controller acts as a mediator that selectively activates the speaker for state indication purposes, separating this function from the main broadcast audio processing. This intermediary control prevents direct crosstalk between audio and video signals while still achieving clear audio-based state indication.
3Ease of operation
If visual indicator is used, then state can be indicated, but cannot be seen in high ambient light or at distance
Solution Approach 1:
The patent substitutes the optical/visual indicator system with an acoustic system. By using audio signals emitted through the speaker, the system overcomes the limitation of visual indicators being washed out by ambient light. Audio signals maintain their detectability regardless of illumination intensity, providing ease of operation in various lighting conditions including high ambient light and远距离 viewing.
Data Source
AI summary
A circuit for audibly indicating at least one state of a television receiver includes memory operative to store at least one audio file, and a controller. The controller is operative during a power-on interval of the television receiver to forward the at least one audio file to an audio indicating device associated with the television receiver for audibly indicating the at least one state of the television receiver.