JPS58100895A - Apparatus for converting 7-segment display signal into hexanary signal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that converts a signal for a 7-segment display used in clock radio receivers, calculators, various measuring instruments, etc. into a decimal signal, and has a simple configuration that accurately converts signals into decimal numbers. It is an object of the present invention to provide an excellent conversion device capable of obtaining a base number signal.

In general, when reading seven signals that display 0 to 6 on a 7-segment display and detecting the numerical value displayed on the 7-segment display, the 7-segment display 7 signals a+ b+
c* d+ e+ f+ q for each segment A of the 7-segment display 1.

B, C, D, E, F, G and these signals av b+ c+ d+ e* 'g (J
) a or d.

The six signals b, C, @, f, and q are input into the microcomputer 2, and this microcomputer 2 outputs the second signal.
The determination shown in the figure is made to obtain six outputs. Namely, 7 signals a, b, c, d, e for a 7 segment display.

f and q are as shown in Figure 3, for example, 7
Segment display 1 displays 6# signals a, b,
a, d, e, f, q are each 1
．． o.

1.1. Since O, l, 1, the microcomputer
The signal a or d*' applied to the input port by the controller 2
It is determined whether +e+f+9 is 1.0, 1, 0, 1° 1 or not, and when it is 1, 0, 1, 0, 1° 1, an output of 6" is output. However, , in this kind, seven signals a for a seven segment display,
b, C.

Since six signals out of d9 eI 'v q are input to the microcomputer 21 and all these signals are judged, the number of connections increases as a whole, and the microcomputer 2 also requires many input ports, which reduces the cost. The problem was that it was extremely disadvantageous.

The present invention eliminates the above-mentioned conventional drawbacks and provides an excellent conversion device with a simple configuration.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The conversion device of the present invention will be described below with reference to drawings of an embodiment. FIG. 4 is a block diagram of an embodiment of the conversion device of the present invention, in which numeral 3 represents a 7-segment display and numeral 4 represents a microcomputer. In the above embodiment, seven signals a, b,
C, d, e, f.

q is each segment A of the 7-segment display 3,
Applied to B, C, D, E, F, G, the above seven signals a+ b, '+ d+ eI
Two signals a, d, and e of f+q are input to the microconbeater 4. That is, the microcomputer makes decisions according to the flowchart shown in Figure 6, and as a result, six outputs from "0" to 6" are output. That is, as is clear from Figure 3, the signals a,
If e changes from 1.0 to 1,1, o, 1°1 to o
, if it changes to o, it is 1, o, from o to 1, if it changes from 1, it is 2.1, if it changes from 1 to 1.0, it is 3.1.0 to o,
If it changes to o, it is 4; if it changes from o to 1.0, it is 6. Therefore, by reading and determining the changes in the signals a and e according to the flowchart shown in FIG.
Six outputs from 0" to 6" can be obtained.

FIG. 6 is a flowchart of another embodiment. In this case, the judgment is first made in the same manner as in FIG. I'm trying to get it. Therefore, when the time is always incremented by 1, as in the case of time display, it is also possible to perform the reading 9 determination as shown in FIG.

In this way, according to the above embodiment, since only the status of two of the seven signals for the 7-segment display is judged, the number of wiring boards is significantly reduced compared to the conventional method, and the size of the microcomputer is also increased. It can be made smaller in width and cheaper.

As is clear from the above embodiments, the device of the present invention determines the states of two of the seven signals for a seven-segment display to obtain a hexadecimal signal, and therefore requires less wiring than conventional devices. The number of boards can be reduced, and if a microcomputer is used, the configuration can be simplified.
It has many advantages, including the ability to significantly reduce costs overall.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional device, Fig. 2 is an explanatory diagram of the operation of a microcomputer used in the same device,
Fig. 3 is a diagram showing the relationship between the signals for the 7-segment display, the display state of the 7-segment display, and decimal numbers, Fig. 4 is a block diagram of an embodiment of the device of the present invention, and Fig. 6 is the same device. FIG. 6 is an explanatory diagram of the operation of the microconbeater used in FIG. 6, and an explanatory diagram of the operation of another embodiment. 1.3...7 segment display, 2,4...
...Microcomputer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] Seven signals a, b, C, d, and e for displaying six displays from 0 to 6 on a 7-segment display. Converts a 7-segment display signal configured to detect the states of two signals a (or d) and e out of f and q, determine the state of these signals, and take out six outputs into a hexadecimal number signal. Device to convert.