Intelligent release with low power consumption liquid crystal display

Abstract

The utility model relates to an intelligent release with low power-consumption LCD, comprising a single chip and a LED, a large-power N channel field-effect transistor . The grid pole of the large-power N channel field-effect transistor is connected with an I / O port of the single chip, the cathode of the large-power N channel field-effect transistor is connected with the anode of the LED through a resistance, the anode of the large-power N channel field-effect transistor is connected with a high electric level; a pull-up resistance is arranged between the I / O port of the single chip and the high electric level. During the unmanned operation, the LED display module consumes lower power, on one hand, the heating quantities are reduced so as to delay the aging of the related components, on the other hand, the service life of background light is prolonged greatly, in addition, the lower power consumption is advantageous for long-term stable operation of electric source, and also is advantageous for long-term stable operation of the intelligent release.

Description

Technical field [0001] The invention belongs to an intelligent tripper, in particular to an intelligent tripper with a low-power consumption liquid crystal display. Background technique [0002] At present, advanced intelligent trip units use LCD screen as the main display element. This display method has many advantages, such as: rich display content, which can display both characters and graphics; human-friendly display, except for symbols and numbers. It can also display Chinese characters, which is convenient for personnel to understand and operate; the display information is flexible, and the content of the screen can be changed according to needs, thereby displaying a large amount of information, etc. However, due to the actual needs of industrial applications, the smart release is usually installed in the power distribution cabinet together with the circuit breaker, which leads to low ambient brightness, and the backlight of the LCD module must be turned on to allow t...

AI Technical Summary

Problems solved by technology

However, due to the actual needs of industrial applications, the smart release is usually installed in the power distribution cabinet together with the circuit breaker, which leads to low ambient brightness, and the backlight of the LCD module must be turned on to allow the operator to see the display clearly content

This brings a series of technical problems: First, the backlight is mostly light-emitting diodes, and the number is relatively large. The increase in output power will cause large heat generation of transformers and various voltage stabilizing components, which will accelerate the aging of these components; thirdly, due to the tight arrangement of electronic components inside the smart release, the above components can also increase the temperature of nearby components, which will Also accelerates the aging of nearby components

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