文档介绍：毕业设计(论文)外文翻译
原文题目:DIGITAL VOLTMETER WITH VARIABLE COLOR BACKGROUND
DIGITAL VOLTMETER WITH VARIABLE COLOR BACKGROUND
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to digital measuring devices utilizing a display with variable color background.
2. Description of the Prior Art
Commercially available measuring instruments with monochromatic digital readout are capable of performing measurements and displaying results at a relatively fast rate. However, to determine the significance of measured values, an operator must rapidly read displayed values, perform parisons with predetermined limits, and take actions accordingly. The task is much plicated when the limits are variable.
SUMMARY OF THE INVENTION
Accordingly, it is the principal object of this invention to provide an improved digital measuring device for facilitating the prompt recognition of significance of measured values.
It is another object of the invention to provide a digital measuring device employing a variable color character display with integral variable color background area.
In summary, a digital measuring device of the invention includes a display on which measured values of voltage may be indicated in a character format. The display is substantially surrounded by a variable color background area which may be illuminated in a color in accordance with the significance of the measured value.
Further objects of the invention will e obvious from the panying drawings and their description.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings in which are shown the preferred embodiments of the invention,
is a block diagram of a digital voltmeter utilizing a display with variable color background.
FIG. 2 is a block diagram of a variable color background digital voltmeter with an parator.
FIG. 3 is a block diagram of a variable color background digital voltmeter with a parator.
FIG. 4 is a simplified schematic diagram of a digital voltmeter of