KR100393581B1 - Washing Machine Operating Apparatus - Google Patents

Abstract

The present invention relates to a washing machine operating circuit unit including a key input unit to which a washing machine command is input and a display unit for displaying the display unit externally according to the command input to the key input unit. By using the same scan waveforms through the input unit and the transistor unit connected to the display unit, the key input unit and the display unit can be scanned so that the circuit is simplified and the size thereof is reduced while preventing the key input due to the LED reverse voltage of the display unit. It has an effect.

Description

Washing machine operating circuit unit {Washing Machine Operating Apparatus}

The present invention relates to a washing machine operating circuit unit, and more particularly, to a washing machine operating circuit unit for scanning the user's command input to the washing machine and the operation of the display unit for displaying the user's command to the outside at the same time.

Washing machines spread to the general public with information that would be provided in any household today range from simply washing laundry to the ability to perform various kinds of washing according to the unique functions of the washing machine model on the market.

The user can adjust the washing water level or the temperature of the washing machine through the key input unit of the washing machine which is purchased or used at home. In addition, the user can select various functions such as high speed washing and wool washing at home. While laundry that was difficult to wash easily can be washed, the time required for washing laundry can be reduced depending on circumstances.

In addition, the washing machine is turned on according to the selected information so that the washing machine can know the matter related to the washing administration, such as the water level and temperature of the washing water selected by the user. It was.

However, a plurality of LEDs constituting the LED unit to be turned on in response to a user command input to the key input unit affects the key input unit due to the reverse voltage, which often causes a wrong input of the key input unit.

In order to solve the above problem, a washing machine operation display circuit of Japanese Patent Publication No. Hei 5-37671 has a microcomputer 70 which performs a predetermined operation programmed in advance as shown in Fig. 1, and the microcomputer 70 A scan circuit 71 for switching the next signal by an output signal of the present invention, a switch input circuit 75 connected to the scan circuit 71 to add a signal for operating the washing machine by the microcomputer, and the switch input. An LED display circuit (77) consisting of a printed board connected in series with a circuit (75) and mounting a plurality of LEDs; and connected between the switch input circuit (75) and the LED display circuit (77). Diodes 81a, 82b, and 83c for preventing electricity from flowing from the 77 to the switch input circuit 75, so that key input is prevented through the diodes 81a, 81b, and 81c.

However, in order to scan a user command input to the washing machine and LEDs turned on according to the user command through the washing machine operation display circuit configured as described above, the microcomputer may scan the key input unit and the LEDs in the design. You must have a port.

Therefore, there is a problem that the circuit constituting the washing machine operation display circuit becomes complicated and its size increases.

The present invention has been made to solve the above problems of the prior art, the object of which is to simultaneously output the scan waveform to a key input unit for the user inputs a command and a display unit for displaying the command input to the key input unit to the outside The present invention provides a washing machine operation circuit unit for scanning a key input unit and the display unit at the same time.

1 is a circuit diagram showing the configuration of a washing machine operation display circuit according to the prior art,

2 is a circuit diagram showing a configuration of a washing machine operating circuit unit according to the present invention;

3 is a graph showing a waveform generated from the washing machine operation circuit unit according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: key input unit 20: display unit

30: microcomputer portion 40: transistor portion

According to a feature of the washing machine operating circuit unit according to the present invention for solving the above problems, a key input unit for inputting a user command for operating the washing machine, and to display the washing machine operation items according to the command input to the key input unit to the outside A micom unit for outputting a scan waveform to the display unit, the key input unit and the display unit to check the operation state of the display unit, and to control the overall washing machine according to a user command input to the key input unit; And a transistor unit connected to the key input unit and the display unit such that the scanned waveform is simultaneously transmitted to the key input unit and the display unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the washing machine operating circuit unit according to the present invention includes a key input unit 10 for a user to perform a washing administration operation and an instruction regarding a washing machine operation, and a user input to the key input unit 10. The display unit 20 displays the command so that the user recognizes the command, and outputs the same scan waveform to the key input unit 10 and the display unit 20 to determine the operation state of the display unit 10. The microcomputer unit 30 which controls the washing machine general instructions and the scan waveforms output from the microcomputer unit 30 are input to the key input unit 10 and the display unit 20. It is composed of a transistor unit 40 connected to the key input unit 10 and the display unit 20 to be transmitted.

In this case, the key input unit 10 may include a first switch sw1 for inputting a command for start / pause, a second switch sw2 for inputting a command for course selection, and a command for reservation. And a third switch sw3 for inputting, a fourth switch sw4 for inputting a command relating to the water level, and a fifth switch sw5 for inputting a command relating to the type of the washing stroke. The input unit 10 includes a plurality of resistors R1, R2, and R3 connected in series or in parallel with the microcomputer unit 30.

In addition, the microcomputer 30 includes a scan waveform output port SO including four pins P1, P2, P3, and P4 for outputting scan waveforms to the key input unit 10 and the display unit 20. And a first scan waveform input port SI1 consisting of four pins P5, P6, P7, and P8 receiving the scan waveform passing through the display unit 20, and the scan passing through the key input unit 10. The second scan waveform input port SI2 includes three pins P70, P71, and P72 for receiving a waveform. The scan waveforms output from P3 and P4 of the scan waveform output port SO are transmitted to the switch of the key input unit 10 and the display unit 20 through the transistor unit 40, respectively.

In addition, the display unit 20 includes a plurality of LEDs L1 to L16 for displaying the user command to the outside as the user command is input to the key input unit 10 to the microcomputer 30, and the LEDs. And a plurality of transistors Tr1 to Tr8 connected to each other, and a plurality of resistors R5, R6, R7, and R8, and the scan waveform output from the input / output pins P1 to P8 of the microcomputer unit 30 is the LED. After passing through, the scan is performed as input to the microcomputer 30.

Lastly, the transistor unit 40 is connected to P3 and P4 of the scan waveform output port SO of the microcomputer unit 30 so that the scan waveform output from the P3 and P4 switches each of the keys of the key input unit 10. And first and second transistors Tr10 and Tr11 for inputting to the LEDs L1 to L8 of the display unit 20, a power supply unit 41 for supplying power to the first and second transistors, and the power supply unit ( 41) and first and second resistor parts 42 and 43 connecting the first and second transistors Tr10 and Tr11.

Figure 3 shows a scan waveform input and output from each pin of the washing machine operation circuit unit according to the present invention. As P1, P2, P3, and P4 sequentially output scan waveforms, corresponding scan waveforms are input to P70, P71, and P72. In this case, as the low voltage waveform of 0 V is input to the P4, the LEDs L1 to L4 are scanned in the display unit, and the microcomputer unit 30 switches the second switch sw2 as the high voltage waveform is input to the P70. It can be seen that has been manipulated.

Looking at the operation of the present invention configured as described above are as follows.

First, the microcomputer unit 30 sequentially outputs scan waveforms through P1, P2, P3, and P4 of the scan waveform output port SO.

The scan waveforms output from P1 and P2 among the scan waveforms output from the microcomputer 30 are input to the LEDs L9 to L16 of the display unit.

Meanwhile, among the scan waveforms output from the microcomputer unit 30, the scan waveforms output from P3 and P4 are inputted to the LEDs L1 to L8 of the display unit 20 and are also inputted to the key input unit 10. The microcomputer unit scans the display unit 20 and the key input unit 10 simultaneously so that a user command input to the key input unit 10 is configured through the second scan waveform input port SI2 consisting of P70, P71, and P72. Let 30 figure it out.

The washing machine operating circuit unit of the present invention configured as described above includes a key input unit for performing a key operation by a user for inputting a command, and a display unit for displaying it externally according to a command input to the key input unit. By using the same scan waveform to scan through the transistor connected to the display unit, the circuit is simplified and its size is reduced, and at the same time, it is possible to prevent key input due to the LED reverse voltage of the display unit.

Claims (3)

A key input unit to which a user command for operating the washing machine is input; A display unit which displays the washing machine operation items according to the command input to the key input unit to the outside; A microcomputer unit for outputting a scan waveform to the key input unit and the display unit to determine an operation state of the display unit and to control the overall washing machine according to a user command input to the key input unit; And a transistor unit connected to the key input unit and the display unit such that the scan waveform output from the microcomputer unit is transmitted to the key input unit and the display unit. The method of claim 1, The display unit washing machine operation circuit unit, characterized in that consisting of a plurality of LEDs that are turned on in accordance with the command of the key input unit input to the microcomputer. The method of claim 1, The transistor unit includes: a plurality of transistors configured to transfer a scan waveform to the key input unit and the display unit as a scan waveform is output from the microcomputer unit; A power supply unit supplying power to the transistor; Washing machine operation circuit unit characterized in that it comprises a resistor for connecting the transistor and the power supply.