【摘要】 本文介绍了应用TP-801单板计算机实现对LED点阵显示器进行控制。实验结果表明,本显示器可以简单、灵活地实现三种颜色的变色显示,不但美观、醒目而且可以满足一些特殊场合的显示需要。字符大小、形状、颜色及字数可以由程序随意改变,从而显示出计算机控制——“万能逻辑电路”的优越性。在国内尚未见到同类工作的报导。更多还原

【Abstract】 This paper describes a new variable color character display unit which is a dual color LED array controlled by a single chip processor.The dual color LED matrix display used in this experiment is a 5×7 dot-array which can display a character. The dual color LED consists of two dies (GaAlAs and GaP) which can emit red and green light respectively. Both dies are encapsulated in the same head with three leads. One of the three leads is a common negative electrode. The dual color LED will emit red, green or yellow light when two dies are turned on respectively or simultaneously. Three colors’ character display can be carried out conveniently and flexibly using TP-801 single chip processor to control LED array. It is not only of a beauty and attracting attention, but also can meet some specific needs. The color and numbers of the characters displayed in the unit can be changed at one’s option through program, therefore, advantage of computer control- "universal logic circuit" is shown.Since a computer can only recognize " 0 " and " 1 " , every character to be displayed must be represented by a set of binary numeral, that is called code. We code for every column, 5 eight-digit binary numbers can express a character. After coding the codes are storaged in an internal memory cell of specified address which can be called. When computer finds out first address of the code of the character to be displayed it can, in turn and repeatedly, switch on first, second, up to fifth column through CPU. Although 5 column LEDs are not lighted up at the same time, one can still observe a stable image at the matrix display owing to effect of human eye’s persistence of vision.The features of the present display unit are as follows:(1) Low power consumption; (2) Low cost;(3) High integration density of circuit; (4) Long lift time.This unit provides a simple, flexible and practicable system to display various color characters at one’s option更多还原