Indicating circuit twinkling at start-up

Abstract

The invention discloses a start-up flashing indicating circuit, which comprises a power supply circuit for an indicator light, a switch element for an indicator light is connected to the power supply circuit for an indicator light, a strobe switch of the switch element is connected in series in the power supply circuit for an indicator light, and the control terminal Connect the output terminal of a hysteresis comparator circuit; in the hysteresis comparator circuit, the first input terminal of the comparator is connected to the DC power supply through the voltage dividing resistor on the one hand, and connected to the comparator through the feedback resistor on the other hand output terminal; the second input terminal of the comparator is connected to the energy storage capacitor on the one hand, and on the other hand is connected to the output terminal of the comparator through another feedback resistor; the output terminal of the comparator is connected to the control of the switching element The terminal controls the switching state of the switching element. The present invention realizes the alternate flickering of the indicator lights in the start-up phase of the electrical equipment by designing an automatic control circuit for the blinking of the indicator light composed of a hysteresis comparator on the circuit board of the electrical equipment, and achieves the expected purpose of prompting when starting up the electrical equipment.

Description

technical field [0001] The invention belongs to the technical field of indicating circuits, and in particular relates to an indicator light control circuit which displays the start-up process by controlling the blinking of the indicator lights when the electrical equipment is turned on. Background technique [0002] With the continuous development of TV technology, a TV can perform more and more functions, and its internal circuit board is extremely complicated, which leads to a significantly longer start-up time of the TV. Especially after the introduction of the digital program standard, the digital-analog all-in-one machine has become an important direction for the development of TV. The current digital-analog all-in-one machine movement generally adopts the embedded Linux framework. above. Consumers who wait for such a long time during use will inevitably feel anxious, and even cause consumers to misunderstand that there is a problem with the TV, thereby reducing consum...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high circuit cost and complex system caused by MCU controlling the indicator light flashing circuit in the prior art, the present invention provides a new type of start-up flashing indication circuit, which uses discrete components to form an indicator light switch control The circuit uses the flickering of the indicator light to remind consumers that the electrical equipment is in the start-up stage, thereby achieving the purpose of alleviating the psychological anxiety and disgust caused by the long start-up time to consumers.

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