KR100199841B1 - Display light controlling and their controlling method of refrigerator - Google Patents

Abstract

The present invention relates to a display brightness adjusting device for a refrigerator and a control method thereof, wherein the switch multiple input determination step determines that a plurality of inputs of a control switch are applied from a user, and the plurality of switching signals as a result of the switch multiple input determination step. When it is determined that the input is made, the brightness control mode switching step is switched to the mode that can control the brightness of the display lamp, and when the brightness control mode is switched in this brightness control mode switching step, the user can adjust the brightness of the display lamp step by step. A key input step and a brightness control step of adjusting the brightness by varying the period of the scan signal according to the key input when a key input for adjusting the brightness from the user is made in this key input step, the switching signal applied from the user The period of the ring counting signal is varied according to the By varying as to the period of the scan signal is applied, is the number of times the turn-on of the light emitting element is changed so as to adjust the brightness according to the user's taste.

Description

Display brightness control device and control method of the refrigerator

The present invention relates to a display brightness adjusting device of a refrigerator and a control method thereof. In particular, in controlling a light emitting device for displaying an operating state of a refrigerator, a frequency of a pulse signal applied to the light emitting device by dividing and varying a scan output signal. The present invention relates to a display brightness adjusting device of a refrigerator and a control method thereof so as not to consume power due to dazzling lights at night by adjusting brightness.

In general, the operation display unit of the refrigerator is divided into a key panel 70 and a display unit 71 so that a user can identify the operation state according to the control of the temperature and function of the refrigerator as shown in FIG. 1. . On the other hand, the display unit 71 is applied to the control signal of the key panel 70, the freezer operating state display lamp 72 for displaying the current operating state of the freezer compartment and the refrigerator operating state display lamp for displaying the operating state of the refrigerator compartment 73, an artificial intelligence display lamp 74 for displaying the function of the refrigerator according to the control signal of the key panel 70, for example, indicating that temperature control is performed on the device itself, and a passage of cold air in three dimensions. It consists of a three-dimensional cooling display lamp 75 for injecting cold air through the passage, and a turbo freezing display lamp 76 for enhancing the freezer performance by injecting strong cold air into the freezer compartment.

In addition, the configuration for the operation of the display unit having the configuration described above, as shown in FIG. And a button switch unit 78 connected to the scan port of the microcomputer 77 in parallel to transmit a control signal from a user to a predetermined terminal of the microcomputer 77, and the button switch unit 78 is pressed. Even if a slight voltage fluctuation occurs in the data output unit 79 in the microcomputer 77 which outputs display data so that the function controlled from the signal is displayed and the data signal output from the data output unit 79, the brightness of the light emitting element A data buffer 80 provided so as not to change, a ring counter 81 configured in the microcomputer 77 to output a scan signal for display, A clock stage 82 for applying a pulse signal so that the ring counter 81 can count, a three-state inverter 83 connected to the scan output terminal of the microcomputer 81 and inverting the scan signal and outputting the scan signal; It consists of a matrix display 84 for driving the light emitting element in combination with the output signal of the three-state inverter 83 and the output signal of the data buffer 80.

In addition, a resistor (R) for stabilization of a circuit is connected between the data output unit (79) and the data buffer (80) along each signal line, and at one end of the three-state inverter (83), the matrix display (84). The earth terminal 85 is connected to allow the light emitting device to be turned on by flowing out current through the).

In addition, the power supply terminal 86 is connected to the other end of the three-state inverter 83 so that the light emitting device is turned off by preventing the leakage of current through the matrix display 84 according to the signal counted by the ring counter 81. do.

On the other hand, the operation of the conventional display unit 71 having such a configuration is as follows.

First, a user applies a signal so that a specific function is controlled using the button switch 78 configured in the key panel 70. At this time, a predetermined function is performed by the applied control signal and the display data is output through the data output unit 79 so that the user can know it. On the other hand, the output signal passes through the resistor (R) for the functional stability, and then flows into the data buffer 80. The data buffer 80 receives the digitized high and low signals from the microcomputer 77. It is applied to and performs a function to make the output current constant by canceling the change of the micro current according to the input signal.

In addition, the ring counter 81 for outputting a scan signal receives a clock pulse from the clock stage 82 to count at a predetermined interval, wherein the clock pulse is applied to each bit using a flip-flop. The divided signal is output. The divided signal is applied in parallel to the button switch 78 and the divided signals are applied to the key input terminal of the microcomputer 77 as a single signal line after passing through each switch. When the sequential flashing signal applied from the ring counter 81 is applied to the microcomputer 77 through a specific switch, the micom 77 is a signal synchronized with the switching signal and the sequential flashing signal of the ring counter 81. By finding, it is possible to determine which switch is the signal input from.

In addition, the output signal of the ring counter 81 is applied to the three-state inverter 83, which is composed of an inverter gate to which a control terminal is connected. The control terminal is directly connected to the power supply, and the inverter gate is connected in the forward direction to output an inverted signal according to the output signal of the ring counter 81. On the other hand, the output signal of the data output unit 79 is displayed so that the user can see the performance state of the function through the matrix display 84. The display is turned on at the intersection of the scan signal through the three-state inverter 83 and the data signal passing through the data buffer 80 to enable functional identification according to the light emitting region.

However, the display process of the refrigerator having the above configuration is not equipped with a device for adjusting the brightness of the light emitting device, so that at night the indoor lighting is relatively dazzling light is emitted, not only to the user's vision This causes a problem of increased power consumption.

Accordingly, the present invention is made to solve the above problems by varying the cycle of the scan signal applied to the matrix display to change the number of turns on the light emitting device to adjust the brightness to suit the user's taste at night It is an object of the present invention to provide a display brightness adjusting device and a control method of a refrigerator that can reduce power consumption due to not disturbing the user's vision in an indoor lighting state.

On the other hand, the present invention for achieving the above object is a switch plural input judging step of determining whether a plurality of inputs of the button switch is applied during the normal operation of the refrigerator, and as a result of the switch plural input judging step determined as a plurality of input of the switch In the brightness control mode switching step of switching to the mode that can adjust the brightness of the display, and the key input step of the key input step to control the brightness from the user when the mode switching is performed in this brightness control mode switching step and this key input The pulse signal division step of adjusting the brightness by dividing the scan signal in accordance with the input key signal in step.

1 is an external view showing an operation display unit of a conventional refrigerator,

2 is a block diagram showing a display principle of a conventional operation panel;

3 is a block diagram according to the present invention,

4A and 4B are waveform diagrams of scan signals to which the principles of the present invention are applied;

5 is a flowchart of the present invention.

<Explanation of symbols for main parts of drawing>

1: microcomputer 2: data output unit

3: data buffer 4: matrix display

5: ring counter 6: divider

7: clock stage 8: decoder

9: control switch unit 10: signal processing unit

11: Three State Inverter

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

First, as shown in FIG. 3, the configuration according to the present invention includes a microcomputer 1 for overall control of an input / output signal of an operation display unit, and a data output unit 2 provided in the microcomputer 1 to output a display signal. And a data buffer 3 which allows the display data signal output from the data output section 2 to be output at a constant level regardless of the small change, and the display data output via the data buffer 3 is displayed. A metric display 4 provided as a light emitting element, a ring counter 5 which scans the display data applied to the metric display 4 at regular intervals so that a corresponding part emits light, and counting of the ring counter 5 A divider 6 provided to divide the divider, a clock stage 7 for applying pulses to the divider 6, and a decoder 8 for varying the divider of the divider 6; And an input terminal of the decoder 8 And a control switch unit 9 for applying a control signal, a signal processing unit 10 for selecting a function according to a signal applied from the control switch unit 9, and a sequential flashing output from the ring counter 5 It consists of a three-state inverter 11 for inverting the signal.

In addition, a resistor (R) for stabilization of a circuit is connected to an output terminal of the data output unit (2), and each control terminal of the inverter provided in the three-state inverter (11) passes through the metric display (4). The power terminals 12 are connected in parallel to block an unnecessary signal, and the light emitting device is grounded so that only a portion of the signal passing through the key display 4 is displayed according to the high signal input of the inverter. The earth terminal 13 is connected.

Further, the control switch 9 is connected to a push switch in accordance with an input signal line so as to control a function from a user.

On the other hand, look at the operation of the present invention made of such a configuration as follows.

First, display data is output through the data output unit 2 so that a user can recognize the function performance of the refrigerator. At this time, the output display data is introduced into the data buffer 3 through the resistor R, and the data buffer 3 is output at a predetermined level according to the input signal irrespective of a small change in the input signal. The ring counter 5 outputs a scan signal which is a sequential flashing signal, which outputs an inverted signal through the three state buffer 11. This inversion signal is combined with the output signal of the data buffer 3 so as to emit light in a corresponding portion of the matrix display 4. For example, if the data output unit 2 has an output signal line of 7 bits, and the ring counter 5 has an output signal of 4 bits, that is, a quadrature counting of each bit, the metric display 4 is 7 A matrix of four rows is formed, which causes 28 light emitting parts to be inserted. In this case, in order to display the first row, the first column, and the second row, the third column of the matrix display 4, the data output unit 2 applies the first pulse to the first row and the third pulse to the second row. At the same time, the ring counter 5 applies a sequential flashing signal from column 1 to column 4, wherein the first counting pulse of the ring counter 5 is inverted low through the three state inverter 11 to display a matrix display. At the same time as enabling the first column of (4), the matrix display 4 receives the first pulse of the first row of the data buffer 3 to light up the light emitting elements of the first row and the first column. Thereafter, the ring counter 5 sequentially applies a flashing signal to two columns, three columns, and four columns, and no further signals are applied to one row of the data output unit 2. Then, the ring counter 5 counts from the first column again. When the third column is counted, the data output unit 2 outputs two rows of output signals, thereby turning on two rows and three columns.

In this way, the control signals for turning on the first row, the first row, and the second row, the third column, are repeated at regular intervals, so that they are driven as if they are simultaneously lit.

On the other hand, when a plurality of key inputs are performed from the control switch unit 9 connected in parallel to the output terminal of the ring counter 5, mode conversion is performed so that brightness can be adjusted. The signal processing unit 10 detects that two pulse signals are input for one cycle through the decoder 8 to convert to a brightness control mode. Then, the user can select the brightness adjustment step through the control switch unit 9, for example, the first switch of the control switch unit 9 is configured to be binary divided and the second switch is a ternary division, The third switch is octal and the fourth is hexadecimal. At this time, when a predetermined switch is pressed by the user, the decoder 8 outputs a control signal according to the divider 6, and the divider 6 receives a pulse signal applied from the clock terminal 7 according to the control signal. Will be busy. The divided pulse signal is applied to the ring counter 5 to output a sequential flashing signal and to apply a synchronization signal to the data output unit 2. This increases the time of one cycle output from the ring counter 5 by a multiplied multiple, so that the cycle time for enabling the light emitting device of the matrix display 4 is reduced, thereby reducing the brightness of the light emitting device.

That is, as shown in FIG. 4A, when the counting period of the ring counter 5 is 'T', the output signal obtained by dividing it binary is shown in FIG. 4B, which is applied to the light emitting device of the matrix display 4. The period of the enable signal is '4T', and the enable signal is applied to the light emitting element by 1/4 times. For example, assuming that the counting period of the ring counter 5 is 1mSEC, the frequency is 1000H _{Z. When} the frequency is binary, 250H _Z is 1/4 times, and the enable signal applied to the light emitting device is 250H _Z. Since the brightness of the light emitting device is to be lowered.

Meanwhile, the display brightness adjusting method of the refrigerator proceeds to the normal operation step S2 through an initialization state S1 where power is applied and data initial setting is performed as shown in FIG. 5. Then, in this normal operation step (S2) is operated as a routine routine and then proceeds to the switch plural input determination step (S3). At this time, when it is determined in the switch plural input determination step S3 that the plurality of switching signals are input from the user, the control proceeds to the brightness control mode switching step S4. Then, in this brightness control mode switching step (S4), the function mode is switched so that the brightness can be adjusted from the user, and proceeds to the key input step (S5). On the other hand, if a key for adjusting brightness according to the user's intention is input in this key input step (S5), the process proceeds to the pulse signal division step (S7), which pulse signal division step (S7) is applied to the user's key input. Therefore, the pulse signal is divided and proceeds to the brightness control step (S8). Then, the brightness of the light emitting device is adjusted according to the signal divided in the brightness adjusting step (S8).

On the other hand, when the switch plural input of the user is made in the switch plural input determination step (S3), and proceeds to the brightness control mode switching step (S4) and proceeds to the operation display step (S6). Then, in this operation display step S6, it is displayed so that it is possible to indicate that the mode according to the plurality of inputs of the switch is switched. In addition, if the key signal input from the user in the key input step (S5) is present, the pulse signal division step (S7) proceeds to the operation display step (S6) and the user's key input is displayed.

As described above, the present invention allows the period of the ring counting signal to be reduced according to the switching signal applied from the user, and at the same time, the period of the scan signal applied to the light emitting device is varied, thereby reducing the number of turn-on times of the light emitting device. It can be used to adjust the brightness according to the user's preference, as well as to reduce power consumption.

Claims (2)

A key panel 70 and a display unit 71 capable of operating a specific function while allowing a user to know that a function is performed, and a user's operation signal from the key panel 70 and the display unit 71 In the refrigerator equipped with a microcomputer (77) to be authorized and performed accordingly, A decoder 8 for decoding a plurality of input signals applied from the control switch unit 9 in the key panel 70, and a signal processing unit 10 for converting into a brightness control mode by the decoding signals of the decoder 8; After the brightness control mode conversion is performed from the signal processor 10, the frequency divider 6 performs a frequency multiplication according to the switching signal input again from the user, and a pulse signal is generated at the frequency multiplier of the frequency divider 6. A clock stage 7 for applying a pulse signal of a predetermined frequency to be output, a ring counter 5 for converting a signal output through the divider 6 into a scan signal, and a scan signal of the ring counter 5 Display brightness adjusting device of the refrigerator, characterized in that consisting of a data output unit for outputting a signal in synchronization with the predetermined data to be displayed. A switch plural input judging process for judging that a plurality of inputs of a control switch is applied from a user, and when it is determined that plural inputs of switching signals are made as a result of the switch plural input judging process, the brightness of the display lamp is adjusted. In the process of switching the brightness control mode to be switched, the key input process of adjusting the brightness of the display lamp step by step when the user enters the brightness control mode in the process of switching the brightness control mode, and in order to control the brightness from the user in this key input process. The display brightness control method of the refrigerator comprising a brightness adjustment process for adjusting the brightness by changing the period of the scan signal according to the key input when the key input is made.

Images