LED nixie tube

Abstract

The invention relates to an LED nixie tube, comprising an outer shell, a circuit board, a plurality of LED lamp beads and a controller, wherein the plurality of LED lamp beads are arranged in seven oreight-segment digital codes, the controller comprises a current sensor, a storage module, a detection module, a driving circuit and an alarm module, an output end of the current sensor is connected with an input end of the detection module, an output end of the detection module is connected with an input end of the driving circuit, an output end of the driving circuit is connected with the alarmmodule, and the storage module is electrically connected with the detection module. In an operating state, the current sensor sends a detected real-time current to the detection module, and the detection module calls a current value allowable range in the storage module, compares the current value allowable range with a detected real-time current value, judges whether the real-time current value is within the current value allowable range, converts the real-time current value into an electric signal if the detected real-time current value is not within the current value allowable range and transmits the electric signal to the driving circuit, so as to drive the alarm module to alarm.

Description

technical field [0001] The invention belongs to the field of electronic components, in particular to an LED digital tube. Background technique [0002] The digital tube, also known as the LED digital tube, is a semiconductor light-emitting device. The digital tube can be divided into a seven-segment digital tube and an eight-segment digital tube according to the number of segments. The eight-segment digital tube has one more light-emitting diode unit (one more decimal point) than the seven-segment digital tube. Display); according to how many "8" can be displayed, it can be divided into 1 digit, 2 digits, 3 digits, 4 digits, 5 digits, 6 digits, 7 digits and other digital tubes. [0003] At present, in order to ensure the same brightness of the digital tubes, constant current control is usually used, that is, the current flowing through each LED is the same, so that the brightness of the LEDs looks the same. Although it is said that it is necessary to ensure that the current...

AI Technical Summary

Problems solved by technology

Although it is said that it is necessary to ensure that the current flowing through each light-emitting diode is the same, this cannot be guaranteed. When the line fails, it is impossible to find out whether the current is non-constant in time. At this time, the brightness of the digital tube will change.

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