JPH01122206A - Input display device for apparatus - Google Patents

Abstract

PURPOSE:To reduce the number of parts by using a light emitting diode for input as well as display operation. CONSTITUTION:In case of display operation, a transistor TR1 is turned on. A current from a power source V1 is led to the transistor TR1 of an output port from an input/output terminal through the circuit consisting of a light emitting diode 4, a resistance R2, a power source V2, resistances R1 and R2. Then, the diode 4 emits light and is operated as a display device. When the optical output is projected to the diode 4, the operating point of the diode 4 is set. The current flowing to the diode 4 flows to the power source V2, the resistance R1, the diode 4, and the power source V1 and the voltage change is outputted to the input/output terminal of a microcomputer 1. Thus, the number of parts is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an input display device for appliances such as washing machines used in general households.

2. Description of the Related Art Many independent devices have been provided as input devices and display devices for devices. for example.

There is an input device for a washing machine shown in Japanese Patent Publication No. 62-167592. As shown in FIG. 5, the input device section of this washing machine amplifies the pulse signal from the output section of the control means 1 in the scan drive section 2, and then amplifies the pulse signal from the output section of the control means 1 via the contact type switch 3. ON or O of contact type switch
The state of the FF is read by the input section of the control means 10 and determined by a program incorporated in the control means 1, thereby functioning as an input device. In addition, as a display device, as shown in Japanese Utility Model Publication No. 16065/1982,
A method has been proposed in which an output signal of a control device is driven by a current and then an indicator lamp is turned on.

Problems to be Solved by the Invention However, the conventional configuration requires a control means, a scan drive unit, a contact type switch, and many other parts, resulting in an expensive input device, and the display device must be combined with a separate circuit. The problem was that it had to be done.

In view of the above-mentioned problems, it is an object of the present invention to reduce the number of parts by combining an input device and a display device, thereby making the device inexpensive.

Means for Solving the Problems In order to achieve the above object, an input display device for equipment according to the present invention comprises a portable light emitting means, a light emitting diode whose reverse breakdown voltage decreases when it receives light, and the light emitting diode seven input means. and a control means for switching to and operating the display means, and when a light signal projected from the portable light emitting means is received by the light emitting diode, the light emitting diode is operated as an input means, and the light emitting diode is operated as an input means. It is configured to operate as a display means when no signal is received.

Effect With the above configuration, when the user projects an optical signal onto the light emitting diode using the portable light emitting means, the light emitting diode will
Since the reverse withstand voltage decreases, the control means operates as an input device depending on the change, and operates as a display device at other times.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 shows the configuration of the input display device of the device in this embodiment. That is, the microcomputer 1 serving as the control means plays a central role in controlling the entire appliance such as a washing machine, and its input/output terminals include a transistor TR1 at the output port and a transistor TR1 at the input port. When TR2i is connected, when the transistor TR1 at the output port is ON, current is drawn from the input/output terminal, and when the transistor TR1 at the output port is OFF, the voltage at the input/output terminal operates the transistor TR2 at the input port. It is said that Also, the output port transistor T
When R1 is ON, the input port transistor TR2 also operates, but the software of the microcomputer 1 does not use its data.

Further, a power source v2 is connected to a connecting portion (input/output terminal) of the transistors TR1 and TR2 via a series body of resistors R, , R2. Further, a power source V is connected to the connection portion of the resistors R, , R2 via a light emitting diode 4. The reverse withstand voltage of this light emitting diode 4 decreases when it receives light from the portable light emitting means 5.

Next, this embodiment will be explained with reference to the time chart of FIG. 3 and the flow chart of FIG. 4. In the case of display operation, in the 10m5QL section of T1 in the time chart of FIG. 3, as the transistor TR1iON of the output port, the power supply V of FIG.
Light emitting diode 4, resistor R2, power supply v2, resistor 1
't1. The circuit of resistor R2 draws current from the input/output terminal to the transistor TR1 at the output port. Therefore, the light emitting diode 4 emits light and operates as a display device. The operating point of the light emitting diode 4 is shown in FIG. 2 (IL). Next, the transistor T111 of the output port is turned OFF and the display is stopped, and the display enters the 10 m5 section of the H level in the time chart of FIG. At this point, the microcomputer 1 executes the input command and checks the operation of the input port transistor TR2.

If the light output from the portable light emitting means 5 is projected onto the light emitting diode 4 within the H level 1Q115 section of the time chart in FIG. 3, the operating point of the light emitting diode 4 will be at point B in FIG. 2(b). is set to Therefore, the light emitting diode 4
The current flowing through the power supply V, the resistor R1, and the light emitting diode 4
, a current flows through the power supply V, and the voltage change is output to the input/output terminals of the microcomputer. The input port transistor TR2 turns ON10 FF due to the voltage change.
It is possible to check whether there is a change in the transistor TR2 by inputting commands on the software. Input port transistor T
If R2 is the heat of change, it is determined that there is no input information,
Return to the initial stage of the flowchart in Figure 4.

The display operation is continued by dynamically lighting the light emitting diode 4 in synchronization with the 1011 ISO interval. If there is a change in the transistor TR2 of the input port, it is determined that there is input information, and after processing the input data, the process returns to the initial stage of the flowchart in FIG.

With the above operation, an input display device can be constructed using only the F-light emitting diode 4. It is something.

Effects of the Invention As is clear from the embodiments described above, according to the present invention, since the light emitting diode is used for both input and display operations, the number of parts can be reduced and the device can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an input display device of a device according to an embodiment of the present invention, Fig. 2 is a characteristic diagram of the same light emitting diode, Fig. 3 is a time chart of the transistor of the same output boat, and Fig. 4 is a
The figure is a flowchart showing the same control, and FIG. 6 is a circuit diagram showing a conventional input device. 1...Microcomputer, 4...
Light emitting diode, 6... Portable light emitting device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] A portable light emitting means, a light emitting diode whose reverse breakdown voltage decreases when it receives light, and a control means for switching and operating the light emitting diode as an input means and a display means, wherein the control means is configured to display a light emitted from the portable light emitting means. The optical signal
An input/display device for equipment that operates the light emitting diode as an input means when light is received by the light emitting diode, and operates as a display means when the light signal is not received.