A kind of cascade pen segment digital display and its driving method

Abstract

A cascaded pen-segment digital display includes a single-chip microcomputer, a DC power supply and several pen-segments, the pen-segments are provided with several built-in drive LEDs, and the several built-in drive LEDs form each pen-segment on a strip-shaped circuit board in a cascaded manner; the built-in Driving the LED includes a power supply terminal, a signal input terminal and a signal output terminal; the power supply terminal is connected to a DC power supply; the signal output terminal is connected to the signal input terminal of the next built-in driver LED; each pen segment includes a signal input terminal and a signal output terminal; The signal output end of one stroke segment is connected with the signal input end of another stroke segment; the signal input end of the first stroke segment is connected with the I / O port of the single-chip microcomputer. Compared with the prior art, the beneficial effect of the present invention is that each pen segment in the seven-segment digital display is connected in a cascading manner, and the combined display of the segment code is controlled by sending a coded signal through a single-chip microcomputer, without using a dedicated LED drive circuit, simplifying The hardware circuit is installed, which is convenient for later installation and maintenance. Compared with traditional digital display, it saves circuit board cost.

Description

Technical field [0001] The present invention relates to the technical field of digital tube drive circuit, in particular to a cascading pen segment digital display and drive method. Background [0002] LED digital tube (LED Segment Displays) is a common digital display device, there are 7 pen segments, by a plurality of light-emitting diodes packaged together to form an "8" type device, by lighting the LED to make the pen segment emit light, the light emitting pen segment can be combined to 0 to 9 a total of 10 different numbers. Multiple LED digital tubes are arranged together to form an LED digital display system. For large LED digital tubes, there are multiple LEDs in series or parallel within each pen segment. The traditional LED digital tube should be displayed normally, and the drive circuit should be used to drive the various segments of the digital tube, so as to display the corresponding number, according to the different driving methods of the LED digital tube, it can ...

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