TV Set Caller ID Rejecting Circuit and MCU Control
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Solution Overview
Problem
Existing television sets cannot automatically reject incoming calls, forcing viewers to manually handle unwanted calls during their viewing experience, especially with the increasing frequency of telemarketing and cold calls.
Innovation Solution
A TV set with a telephone calls-rejecting function, featuring a first and second communication port, a switching circuit, a decoder, and a microcontroller unit (MCU) that decodes caller IDs and automatically rejects calls based on pre-set rejection information stored in memory, using a caller ID reject list and rejection history records to determine whether to interrupt communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the TV set displays caller ID information, then viewers can identify unwanted calls, but viewers still cannot automatically reject these calls and must manually handle them
Solution Approach 1:
The patent combines the TV set with telephone call rejection functionality by integrating a switching circuit that can be controlled by the TV's microcontroller. The TV set now performs both display functions and automatic call rejection functions simultaneously, eliminating the need for separate manual operation at the telephone device.
Solution Approach 2:
The system enables automatic call rejection where the TV set itself performs the rejection action based on stored rejection information. When a caller ID matches entries in the rejection database, the switching circuit automatically disconnects the call without requiring viewer intervention, making the system serve itself.
2Object-affected harmful factors
If viewers manually reject calls using the telephone, then unwanted calls can be rejected, but viewers are interrupted from enjoying their favorite program
Solution Approach 1:
The system performs preliminary actions by pre-storing rejection information for known unwanted numbers in memory. When a call comes in, the system automatically compares the caller ID against this pre-stored database and rejects matches immediately without requiring viewer action, thus protecting viewing time in advance.
Solution Approach 2:
The automatic rejection mechanism allows the system to handle unwanted calls independently without interrupting the viewer. The TV set monitors incoming calls, identifies unwanted ones using stored criteria, and rejects them automatically, enabling the system to serve itself while maintaining uninterrupted viewing experience.
3Extent of automation
If the TV set continuously monitors incoming calls for rejection, then unwanted calls can be automatically rejected, but energy consumption increases
Solution Approach 1:
The system employs periodic monitoring rather than continuous active processing. The TV set checks incoming calls at discrete intervals when call signals are detected, rather than continuously analyzing all signals. This periodic approach maintains automation capability while significantly reducing overall energy consumption during non-call periods.
Solution Approach 2:
The system extracts and processes only the relevant portions of incoming signals - specifically extracting caller ID information when a call is detected - rather than continuously processing all incoming electrical signals. This selective extraction reduces processing load and energy consumption while maintaining effective call rejection functionality.
Data Source
AI summary
A TV set (20) with a function of rejecting telephone calls is provided. The TV set includes a first communication port (201) and a second communication port (210) respectively connected with a telephone network (30) and a telephone (40). A switching circuit (209) is interposed between the first communication port and the second communication port; a decoder (202) is connected to the switching circuit and used for decoding a caller ID of an incoming call from the telephone network and transmitting the decoded caller ID to a display unit (205) to be displayed and to a MCU (203); and the MCU for invoking an automatically rejecting module (208) to automatically rejecting the incoming call by switching off the switching circuit according to rejection information stored in a memory. A related method is also provided.