Standby Control Circuit for Display Devices
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Solution Overview
Problem
High standby power consumption in large-size display products with high-power power boards or multiple spliced power boards, leading to noise, security risks, and user experience issues due to relay-based solutions.
Innovation Solution
A standby control circuit with a transistor switch control module, using SCR devices connected between power boards and the mains supply, controlled by a standby module that generates trigger signals to manage power connections, reducing standby power consumption and surge currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If relay-based control is used to manage power switches, then power connection control is achieved, but noise and security risks increase due to sparks and loud noises
Solution Approach 1:
The patent replaces the mechanical relay system with an electronic transistor switch control system. The transistor switches (Q1-Q4) controlled by the microcontroller (U1) eliminate mechanical contact, thereby removing the sources of noise and sparks while maintaining the power connection control function.
Solution Approach 2:
The patent introduces an intermediary control system consisting of the microcontroller (U1) and transistor switches (Q1-Q4) that mediate between the power source and the power boards. This intermediary electronic control layer replaces direct mechanical relay control, reducing harmful effects while achieving the same control objective.
2Ease of operation
If relay-based control is used to manage power switches, then power connection control is achieved, but surge current increases causing false triggering of protective devices
Solution Approach 1:
The patent implements preliminary action through the microcontroller (U1) which pre-coordinates the switching of multiple transistor switches (Q1-Q4). This allows for controlled, sequential power board activation rather than simultaneous relay switching, reducing surge current magnitude and preventing false triggering of protective devices.
Solution Approach 2:
The patent introduces dynamic control through the microcontroller (U1) that can adjust the timing and sequence of transistor switch activation. This dynamic coordination of power board switching optimizes the power-on process, reducing surge current impacts compared to fixed relay-based simultaneous switching.
3Power
If multiple power boards are spliced together to form a high-power system, then power capacity increases, but standby power consumption increases multiple times
Solution Approach 1:
The patent divides the high-power system into multiple independent power boards (first power board, second power board, etc.), each with its own transistor switch control. This segmentation allows independent control of each power board's connection to the mains supply, enabling selective activation to reduce standby power consumption while maintaining the capability for high total power output.
Solution Approach 2:
The patent implements periodic or selective activation of power boards through the microcontroller (U1) controlling transistor switches. Instead of keeping all power boards continuously connected to the mains supply, the system activates only the necessary power boards based on demand, reducing standby power consumption while maintaining high power capacity when needed.
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
Effectively reduces standby power consumption, minimizes noise and surge currents, and enhances user experience by independently controlling power boards and managing power-on timing.
Implementation Method 1
The SCR device is a bidirectional SCR device, which is turned on when a forward voltage signal is inputted to a first electrode of the bidirectional SCR device from the mains supply input terminal and a control electrode of the bidirectional SCR device receives the trigger signal sent from the standby module
Data Source
AI summary
The invention discloses a standby control circuit and a display device. The standby control circuit includes a standby module, at least one power board, and a transistor switch control module comprising at least one transistor switch whose number is equal to that of the at least one power board, each transistor switch is connected between one power board and a mains supply input terminal, the standby module is configured to generate a trigger signal and send the generated trigger signal to each transistor switch, and each transistor switch is configured to be turned on upon receipt of the trigger signal sent from the standby module so as to connect the power board connected thereto with the mains supply input terminal.