KR100212572B1 - Key pad operation guide of microwave oven - Google Patents

Abstract

The present invention relates to a keypad operation guide display device of a microwave oven, comprising: a key pad portion 6 including a plurality of pads indexed by numbers or letters, and a respective pad and a bottom surface of the key pad portion 6; The plurality of key signal generators 10 and the key signal generator 10 which are located correspondingly in the same number and output different key signals as an arbitrary pad of the key pad unit 6 is pressed, In the microwave operation guidance display device having a first display means 40 for displaying a predetermined character corresponding to each key signal applied, the pad and key signal generation unit corresponding to the same number of pads And second display means 50 respectively positioned between the plurality of display units 10 and selectively turned on or off according to each key signal applied from the key signal generator 10, and in the key signal generator 10; Each corresponding to the applied key signal The first display means 40 is driven in response to the memory unit 30 in which data is stored in advance and the key signal applied from the key signal generation unit 10, and is stored in the memory unit 30. The control unit 20 reads out any data present and turns the second display means 50 on or off in the order corresponding to the read data, without the user referring to the operation manual of the microwave oven. This makes it easy to perform the following key operations.

Description

Keypad operation guide display device of microwave oven

The present invention relates to a microwave oven, and more particularly, to a keypad operation guide display device of a microwave oven.

The microwave oven can be broadly divided into an oscillation part, a high pressure part, a control part, and a heating chamber.

The oscillator consists of a magnetron generating high frequency, a waveguide leading the high frequency to the heating chamber, and a cooling fan to cool the magnetron. The control unit is a time switch or control circuit for controlling the cooking time. Finally, the heating chamber is composed of a heating chamber, a turntable and a door for taking in and out food, which are closed at high frequency.

Among these components, the controller controls the components described above to be appropriately driven at the time of cooking time setting or various function setting by the user's keypad operation, thereby inducing the predetermined food to be cooked optimally. In addition, the control unit causes the cooking time to be displayed on the screen, not only to input an appropriate cooking time, but also to recognize the user how much remaining cooking time remains.

In more detail, the microwave keypad includes a plurality of pads in which various letters or numbers are indexed, and a display window including a plurality of light emitting devices, eg, LEDs, for displaying an operating state of the microwave. When any pad is pressed, the input content and the current state of the microwave are displayed on the display window according to the control signal of the controller.

On the other hand, due to the recent development of electronic technology, microwave ovens are simply spreading from the time setting or some restricted simple functions, and the functions are spreading to shortening (note) function, keeping warm function, locking function, and error checking function.

However, such a conventional microwave oven has one major disadvantage in the user's keypad operation surface.

That is, when the user presses an arbitrary pad, the letter or number of the display unit is changed by the control signal of the controller, and only the current operating state of the microwave is displayed externally. Therefore, the user only grasps the function setting or change of the currently input microwave oven, and does not know which pad to input in the future.

In other words, the user did not know in what order the pads should be operated unless the user manual was referred to at the time of setting the above-mentioned shortening function, keeping warm function, and the like.

In addition, in the case of the non-skilled person, even if a simple time setting, it is difficult to operate the keypad without viewing the instruction manual, and there is a problem that a product defect is caused by an incorrect keypad operation.

Accordingly, an object of the present invention is to provide an apparatus for displaying a key operation sequence of a microwave oven externally.

In order to achieve the above object, the present invention provides a key pad part including a plurality of pads indexed with numbers or letters, and the lower part of the key pad part corresponding to the same number as each pad. An electronic apparatus comprising a plurality of key signal generators for outputting respective different key signals as the pad is pressed, and first display means for displaying predetermined characters corresponding to each key signal applied from the key signal generator; In the microwave operation guidance display apparatus, the pads and the key signal generation unit are respectively located in the same number as the plurality of pads, and selectively on or on / off according to each key signal applied from the key signal generation unit. A second display means, a memory unit in which respective data corresponding to the key signal applied from the key signal generation unit are stored, and the key signal The first display means is driven in response to each key signal applied from the voice part, and the second display means is turned on or on / off in an order corresponding to the read data by reading out any data previously stored in the memory part. An operation guide display device for a microwave oven, characterized by comprising a control unit.

1 is a block diagram of a keypad manipulation guide display device of a microwave oven according to the present invention;

2 is a detailed view showing a membrane key pad portion of a microwave oven according to one embodiment of the present invention;

3A is a detailed cross-sectional view of the membrane key circuit portion of FIG. 2;

3B is a detailed cross-sectional view of the NCAP LCD unit of FIG. 2;

4 is a flowchart illustrating a process of selectively turning on / off an NCAP LCD unit according to a time key signal from the membrane key circuit unit of FIG.

* Explanation of symbols for main parts of the drawings

6: keypad 7: function selection pad

7-1: Time Pad 8: Time Setting Pad

9: cooking start pad 9-1: cooking stop pad

10: membrane key circuit 20: microcomputer

30: ROM 40: LED display part

42: LED display window 44: grid

46: LED device 50: NCAP LCD

14,58: support 16,54: common electrode

18,56: segment electrode 53: transparent film

55 NCAP liquid crystal molecule 57 Reflector

60 drive unit

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

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

1 is a block diagram of a keypad manipulation guide display device of a microwave oven according to the present invention.

The microwave keypad operation guidance display device includes a membrane key circuit portion 10, a microcomputer 20, a read only memory (ROM) 30, a light emitting diode (LED) display portion 40, and a nematic curvalinear aligned phase (NCAP LCD). -Liquid Crystal Display) 50, and the driving unit 60 is largely divided.

Among them, the membrane key circuit unit 10 transmits a key signal to the microcomputer 20 to selectively control the NCAP LCD unit 50 located at the bottom of the keypad 6 of the microwave oven according to the present embodiment. Is authorized.

FIG. 2 shows a detailed view of the key pad section 6 each including the membrane key circuit section 10 and the NCAP LCD section 50 described above.

In the figure, a plurality of pads 7, 8, 9, and 9-1 are included on the upper surface of the keypad 6, and each of these pads 7 and 8 is provided. In (9) and (9-1), letters or numbers are indexed to facilitate setting of various functions of the microwave oven.

In detail, a display window 42 for easily checking the LED device 46 displaying the operating time of the microwave is provided at the top of the keypad 6, and at the bottom thereof, various functions of the microwave can be selected. It includes a plurality of function setting pads 7 and time setting pads 8 composed of ten numbers for operating time setting. In addition, below the time setting pad 8, cooking start / stop pads 9 and 9-1 for selecting or canceling various operations of the microwave are provided.

On the other hand, the membrane key circuit portion 10 is located to correspond to the same number of pads (7), (8), (9), (9-1) of each of the key pad portion (6), the key pad portion (6) An arbitrary pad of) generates an on / off signal as the pad is pressed.

3A shows a detailed cross-sectional view of this membrane key circuit portion 10.

The membrane key circuit section 10 is a flat key circuit section used as a simple input device of an electronic device. The membrane key circuit section 10 includes a common electrode 16 and a segment drawn with a conductive ink between the supports 14 made of two thin plastic films. segment) electrode 18, respectively.

Accordingly, the pad inputted from the key pad unit 6, for example, the segment electrode 18 corresponding to the start pad 9, is connected to the common electrode 16, so that a corresponding key signal, for example, a start signal is output.

Referring back to FIG. 2, it can be seen that the NCAP LCD unit 50 according to the present embodiment is located between the key pad unit 6 and the membrane key circuit unit 10. That is, when a key signal is applied from the membrane key circuit unit 10, a control signal is provided to the NCAP LCD unit 50. Accordingly, the NCAP Liquid Crystal Device 55 emits light, and the character or the character is externally transmitted through the corresponding pad. Display numbers selectively.

3B illustrates such a NCAP LCD unit 50 in detail.

As shown in FIG. 3B, the NCAP LCD unit 50 includes a transparent film 53, a common electrode 54, an NCAP LCD 55, a segment electrode 56, a reflector 57, and a support 58, respectively. Each component is made of a flexible material.

First, the transparent film 53 is mounted directly under the keypad 6 in order to increase the transmittance of light transmitted from the NCAP LCD 55. That is, since the corresponding NCAP LCD 55 transmits light, the display of letters or numbers indexed on the keypad 6 becomes easy.

In addition, the common electrode 54 and the segment electrode 56 connect the NCAP LCD 55 under the transparent film 53, and the power is connected or disconnected under the control of the microcomputer 20.

In addition, the NCAP LCD 55 according to the present embodiment is a semi-solid state liquid crystal molecule capable of electrically controlling the transmittance of light. The NCAP LCD 55 may be liquefied depending on whether the common electrode 54 and the segment electrode 56 are connected. Crystallize.

Finally, the reflecting plate 57 reflects the light transmitted from the NCAP LCD 55 so that the user can see the light, the support 58 is the respective components of the above-described NCAP LCD unit 50 Support the wealth.

1 again, a block diagram of a keypad operation guide display device of a microwave oven according to the present invention will be described.

The ROM 30 pre-stores data for selectively turning on / off the NCAP LCD unit 50 according to the present embodiment. The ROM 30 corresponds to an arbitrary key signal applied from the membrane key circuit unit 10. The data corresponding to the control of 20) is read out.

The LED display unit 40 is provided with a predetermined display element 46, for example, a seven segment LED, to display the cooking time of the microwave oven, and each segment 46 is controlled by a control signal of the microcomputer 20. Selectively emit light. In addition, the LED display unit 40 includes seven LED elements 46 constituted by one grid 44, so that a total of four digits of time can be displayed.

The driving unit 60 can be largely divided into an oscillation unit consisting of a magnetron and a cooling fan, and a high pressure unit consisting of a transformer and a high pressure condenser / diode, etc., and drive the microwave oven in response to a control signal of the microcomputer 20.

The microcomputer 20 controls each of the above-described components, and reads predetermined data from the ROM 30 in response to a key signal applied from the membrane key circuit unit 10, and sets a predetermined sequence according to the read data signal. As such, the NCAP LCD unit 50 is selectively turned on / off.

Next, the NCAP LCD unit 50 according to the present embodiment including the above-described configuration unit will be described in detail with reference to the flowchart of FIG.

Prior to the description, the flowchart of FIG. 4 exemplifies a control process at the time of setting the microwave.

First, when the time pad 7-1 is pressed by the user among the respective pads placed on the key pad part 6, the time pad of the membrane key circuit part 10 located at the bottom of the key pad part 6 ( As the common electrode 16 and the segment electrode 18 corresponding to the position 7-1) come into contact with each other, a time key signal is output, and the output signal is applied to the microcomputer 20 (step 100).

In response to the time key signal, the microcomputer 20 reads out data signals pre-stored in the ROM 30 and provides control signals corresponding to the read data signals to the respective NCAP LCDs 55 (step 102). ).

By the control signal of the microcomputer 20, the NCAP LCD unit 50 corresponding to the position of the time pad 7-1 is turned on (step 104), and a large number is used to induce the user's time setting pad 8 input. The NCAP LCD unit 50 corresponding to the positions of the two time setting pads 8 is turned on / off at predetermined time intervals, for example, at 0.5 second intervals (step 106).

In addition, when the user sequentially inputs the time setting pad 8, the time setting key signal is applied to the microcomputer 20 in the membrane key circuit unit 10, and the microcomputer 20 is controlled by an LED driver (not shown). By outputting the signal, a predetermined number corresponding to the input key signal is displayed through the LED display unit 40.

At the same time, the microcomputer 20 determines whether the predetermined time setting is completed (the time setting completion criterion of the microcomputer 20 is based on the grid of the last digit 44 of the four digit grid of the LED display unit 40). When the time setting is completed (step 108), the NCAP LCD unit 50 corresponding to the position of the time setting pad 8 is turned off (step 110), to induce the next pad input. The NCAP LCD unit 50 corresponding to the position of the start pad 9 is turned on (step 112).

Then, the microcomputer 20 determines whether the start key signal is input from the membrane key circuit unit 10 (step 114), and operates the drive unit 60 when the start key signal is applied (step 116).

At the same time, the microcomputer 20 displays the operation time or operation state of the microwave oven currently in progress through the LED display unit 40 (step 118). In addition, when the microcomputer 20 continuously detects the current time and reaches the set time (step 120), the microcomputer 20 turns off the NCAP LCD unit 50 corresponding to the position of the time pad 7, thereby providing the user with a microwave oven. Recognize that the time setting is complete (step 112).

Through the above process, the NCAP LCD unit 50 is selectively turned on / off according to an arbitrary key signal of the microwave oven.

In addition, the display colors of the function selection pad 7, the time setting pad 8, and the cooking start / stop pads 9 and 9-1 used in this embodiment may be divided into three types.

In detail, each NCAP LCD unit 50 is equipped with an RGB (red, green, blue) filter, and the NCAP corresponding to the position of the function selection unit, time setting unit, and cooking start unit on the keypad unit 6 is provided. Differential display of the color of the LCD 55 may allow the user to further facilitate keypad entry.

In addition, the selective control method of the microcomputer according to the present invention is not limited to a microwave oven, but may be applied to other electronic products.

As described above, the present invention has the effect of selectively displaying the keypad of the microwave oven in advance, so that the user can easily perform the next keypad operation without referring to the operation manual of the microwave oven.

Claims (5)

In the microwave, A key pad section 6 including a plurality of pads in which numbers or letters are indexed; A plurality of keys are located on the bottom surface of the key pad unit 6 in the same number as each pad, and outputs different key signals as any pad of the key pad unit 6 is pressed. A signal generator 10; First display means (40) for displaying a predetermined character corresponding to each key signal applied from said key signal generator (10); Located between the pad and the key signal generator 10 to correspond to the same number of pads as the plurality of pads, and selectively on or on / on in accordance with each key signal applied from the key signal generator 10. Second display means (50) which is turned off; A memory unit 30 in which data corresponding to a key signal applied from the key signal generator 10 is stored in advance; The first display means 40 is driven in response to each key signal applied from the key signal generation unit 10, and arbitrary data previously stored in the memory unit 30 is read out to read the read data. And a control unit (20) for turning on or off the second display means (50) in the order corresponding to the data. The first electrode unit 16 of claim 1, wherein each of the key signal generators 10 includes two contacts fixed to the inside of two interlocking first supports 14 spaced apart from each other. And the first electrode portions 16 and 18 are turned on by pressing the two spaced apart first supporters 14 together as the pads are pressed. Operation guide display device of the stove. The second electrode unit (54) according to claim 1, wherein each of the second display means (50) includes two contacts spaced apart from each other between the transparent plate (53) and the second support (58). And light emitting means (55) connected between the second electrode portions (54) and (56). 4. The light emitting unit of claim 3, wherein the controller 20 provides a control signal to the second electrode portions 54 and 56 in response to an ON signal generated from the key signal generator 10. 55. An operation guide display device for a microwave oven characterized by emitting light. 4. The display device of claim 3, wherein each of the second display means (50) further includes a reflecting plate (57) provided inside the second support (58) to increase the efficiency of light generated by the light emitting means (55). Microwave operation guide display device, characterized in that.

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