KR101685880B1 - Water dispensing apparatus - Google Patents

Abstract

The present invention relates to a water discharge device.
A water discharge apparatus according to one aspect, comprising: a housing having a recessed space in which a container can be placed; A discharge port through which the water can be discharged into the recessed space; A container support capable of supporting a container located in the recessed space; And a light emitting portion provided in the housing, the light emitting portion irradiating light to a predetermined region of the container supporting portion to guide the position of the container on the container supporting portion.

Description

Water dispensing apparatus

The present invention relates to a water discharge device.

Generally, a water supply device refers to a device that supplies purified water to be supplied to a user for drinking, cooking, or the like.

Korean Patent No. 10-0870209, which is a prior art document, discloses a water purifier tap light and an opening / closing apparatus using an LED.

In the case of the prior art, the illumination LED is installed on the upper side of the water intake space and is turned on by pressing the guide button, thereby enabling the user to easily drink water through the water intake hole even in the dark place at night do.

However, in the case of the prior art, since the illumination LED serves only as a lighting at night, when the user takes out the water, the position of the intake port can not be accurately ascertained, so the user must hold a container there is a problem.

In addition, in the case of the prior art, the illumination LED functions only as a lighting function and fails to perform a function of displaying the state of the water purifier.

An object of the present invention is to provide a water discharging device which can accurately confirm the position of water taken out from an outlet.

It is also an object of the present invention to provide a water discharge device in which a user can easily confirm the state of the water discharge device.

A water discharge device according to one aspect, comprising: a housing having a recessed space in which a container capable of containing water can be located; A discharge port through which the water can be discharged into the recessed space; An input unit for selecting a temperature of water to be discharged from the discharge port; A container support capable of supporting a container located in the recessed space; A sensing sensor for sensing the approach of the human body to the periphery of the housing; A first light emitting unit disposed outside the outlet and separately provided to the housing, the first light emitting unit irradiating light to a predetermined region of the container supporting unit to guide the container mounting position on the container supporting unit; And a second light emitting unit provided in the housing, the second light emitting unit irradiating light of one color among a plurality of hues corresponding to the temperature of one of the selected hot water, cold water and purified water through the input unit to the container supporting unit.

The first light emitting unit is turned on after an approach of the human body is detected by the detection sensor.

The first light emitting portion irradiates light on a portion where the water discharged from the discharge port falls on the container supporting portion or around the portion.

In a certain region of the container supporting portion where the light is irradiated, a mark for guiding the position of the container is provided.

The water discharging apparatus of the present embodiment may further include a controller for determining whether the first light emitting unit is turned on based on information sensed by the sensing sensor.

The control unit may turn on the first light emitting unit when the time when the approach of the human body is detected by the detection sensor reaches a reference time.

The control unit may turn off the first light emitting unit when the first light emitting unit is turned on, the water discharge command is input, the water discharge command is input, and the water discharge is completed.

When the second light emitting unit is turned on, the second light emitting unit may be turned off when a water discharge command is input, a water discharge command is input, and water discharge is completed.

When the second light emitting unit is turned on and the detection sensor does not detect the human body, the second light emitting unit may be turned off.

The first light emitting unit and the second light emitting unit may be simultaneously turned on for a predetermined time.

According to the proposed invention, as the light emitted from the first light emitting portion reaches a certain region of the container supporting portion, the light can indicate the seating position of the container. Thus, the user can intuitively recognize the seating position of the container, so that the container can be placed on the predetermined area.

In this case, the water discharged from the discharge portion can be dropped into the container. Therefore, since the user can hold the container with the container in the state where the container is not placed on the container supporting portion, the convenience of the user can be improved.

Further, since the light irradiated from the first light emitting portion indicates the seating position of the container, the phenomenon that the user falls to the outside of the container as the container is placed at an arbitrary position of the container supporting portion can be prevented.

Furthermore, in the case of selecting the continuous button, since the user does not have to wait until the container is lifted to discharge the water, the convenience of the user can be further improved.

Further, there is an advantage that the user can intuitively check the state of the water discharging device as the first light emitting portion or the second light emitting portion irradiates light of a specific color corresponding to the state of the water discharging device.

1 is a perspective view of a water discharge device according to an embodiment of the present invention;
Fig. 2 is a side view of the water discharging device of Fig. 1; Fig.
3 is a control block diagram of a water discharge device according to an embodiment of the present invention.
4 is a flowchart illustrating a method of controlling a first light emitting unit according to an embodiment of the present invention.
5 is a view for explaining a control method of the first light emitting unit according to another embodiment of the present invention.
6 is a view for explaining a control method of a second light emitting unit according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

FIG. 1 is a perspective view of a water discharging apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the water discharging apparatus of FIG. 1, and FIG. 3 is a control block diagram of a water discharging apparatus according to an embodiment of the present invention .

1 shows a water purifier as a water discharging device as an example.

Referring to FIGS. 1 to 3, the water discharging apparatus 1 according to an embodiment of the present invention may include a housing 10 that forms an outer appearance.

The housing 10 may include one or more filters 11 for purifying water. As another example, the housing 10 may be connected to a tank containing purified water to receive purified water from the tank.

The housing 10 may include one or more outlets 20 for discharging water. In the present embodiment, the housing 10 can discharge water in at least one of purified water, cold water, and hot water. The discharge port 20 may be a common discharge port for discharging purified water, cold water, and hot water, or may be provided to discharge purified water, cold water, and hot water, respectively.

The housing 10 may include an input 12 for inputting a command.

The input unit 12 may include at least one of a hot water button for inputting a hot water discharge command, a cold water button for inputting a cold water discharge command, and an integer button for inputting a purified water discharge command. In this specification, the hot water button, the cold water button, and the purified water button may be referred to as type buttons for selecting the temperature of the water to be discharged.

The input unit 12 may further include a continuous button for selecting water to be discharged continuously for a predetermined amount or for a predetermined time.

Alternatively, the input unit 12 may receive a command in a touch manner, and a selection region serving as the type button described above may be displayed on the screen for the user's touch.

The housing 10 may further include a space 16 in which a container C capable of holding water is located. The space 16 may be formed as a part of the front surface of the housing 10 is recessed backward. The input unit 12 may be located above the space 16.

A part of the discharge port 20 is located at the upper side of the space 16, and water can be discharged to the space 16. The outlet (20) may be exposed to the space (16).

The housing 10 may further include a container support 13 for supporting the container C.

The water discharged from the discharge port 20 can be dropped to the container supporting portion 13. [ That is, the discharge port 20 may be arranged to overlap with the container supporting portion 13 in the vertical direction.

If the housing 10 has a recessed space 16, it may be difficult for the user to identify the lower end of the outlet 20.

Accordingly, the housing 10 may further include a first light emitting portion 31 so that the user can indirectly confirm the position of the lower end of the outlet 20. [

The first light emitting portion 31 may be a high-luminance LED having a strong directivity. The first light emitting portion 31 may be disposed around the discharge port 20 to irradiate the light to the container supporting portion 13. At this time, the light emitted from the first light emitting portion 31 can reach only a certain region 14 of the container supporting portion 13.

That is, all of the light of the first light emitting portion 31 can be irradiated to a part of the container supporting portion 13. [

The first light emitting portion 31 is not positioned around the discharge port 20 but is arranged at an arbitrary position on the wall forming the recessed space 16, You can investigate.

The predetermined region 14 (which may be referred to as a light arrival region) through which the light emitted from the first light emitting portion 31 reaches reaches a region corresponding to a region where the dropped water discharged from the discharge port 20 reaches, Lt; / RTI >

For example, the predetermined region 31 through which the light emitted from the first light emitting portion 31 reaches may be overlapped with the outlet 20 in the vertical direction. In this case, the first light emitting portion 31 may be inclined.

The water discharged from the discharge port 20 may drop directly into the predetermined area 14 or around the predetermined area 14. Therefore, the user can place the container C in a certain region 14 on the container supporting portion 13.

Of course, the predetermined region 14 may not overlap with the discharge port 20 in the vertical direction depending on the installation position of the first light emitting portion 31.

According to the present embodiment, as the light emitted from the first light emitting portion 31 reaches a certain region 14 of the container supporting portion 13, the light can indicate the seating position of the container C .

Thus, the user can intuitively recognize the seating position of the container C, and can place the container C on the certain area 14. [

In this case, the water discharged from the discharge portion 20 can be dropped into the container C. Therefore, since the container C can be filled with the container C in a state in which the container C is not held on the container supporting portion 13 without the user holding the container C, the convenience of the user is improved.

Since the light irradiated from the first light emitting portion 31 indicates the seating position of the container C, when the user places the container C at an arbitrary position of the container supporting portion 13, The phenomenon of falling to the outside of the casing C can be prevented.

Moreover, in the case of selecting the continuous button, since the user does not have to wait until the water discharge is completed by holding the container C, the convenience of the user can be further improved.

Although not shown, the container supporting part 13 may have a marking for indicating the seating position of the container C in the predetermined area 14. [ In this case, the light emitted from the first light emitting portion 31 may be irradiated with the mark. The indicia may be a groove or may be attached or coated to the container support.

The housing 10 may further include a second light emitting unit 32 for irradiating light to indicate the state of the water discharging device 1.

And the second light emitting portion 32 may be positioned around the discharge opening 20. Part or all of the light emitted from the second light emitting portion 32 can reach the container supporting portion 13. [

The second light emitting unit 32 may emit light of one or more colors depending on the state of the water discharger 1. In this embodiment, the state of the water discharge device 1 may include, for example, a type of command input to the water discharge device 1, a temperature of water to be discharged from the water discharge device 1, and the like.

The water discharge device 1 may further include a human body detection sensor 40. Although not limiting, the human body sensor 40 may be positioned in front of the housing 10.

The human body sensor 40 may be, for example, an infrared sensor or an ultrasonic sensor. It is to be noted that there is no limitation in the kind of the human body detection sensor 40 in the present embodiment.

The human body detection sensor 40 can detect the approach of the human body to the periphery of the housing 10.

For example, the first light emitting unit 31 may be turned on when a human body (including not only a human body but also an object other than a human body) is detected by the human body detection sensor 40.

The water discharge device 1 may further include a temperature sensor 52. The temperature sensor 52 may sense at least one of the cold water temperature and the hot water temperature.

The water discharge device 1 may further include a controller 50 for controlling discharge of water and controlling the first light emitting unit 31 and the second light emitting unit 32.

The control unit 50 may determine whether the first light emitting unit 31 is turned on based on the information detected by the human body detection sensor 40.

Hereinafter, the control method of the first light emitting unit and the second light emitting unit will be described.

Since each of the first light emitting unit and the second light emitting unit can be independently controlled, a method of controlling the first light emitting unit will be described first.

4 is a flowchart illustrating a method of controlling a first light emitting unit according to an exemplary embodiment of the present invention.

Referring to Fig. 4, the water discharge device 1 waits for discharge of water (S1). The first light emitting portion 31 is in the off state while the water discharging device 1 waits for the discharge of the water.

During the water discharge standby, the controller 50 may determine whether the human body detection sensor 40 senses a human body (S2).

If it is determined in step S2 that the human body detection sensor 40 has detected a human body, the controller 50 determines whether the human body detection time of the human body detection sensor 40 has reached a reference time (S3).

If it is determined in step S3 that the human body detection sensor 40 has reached the reference time, the controller 50 may control the first light emitting unit 31 to be turned on (step < RTI ID = 0.0 > S4).

Then, the light emitted from the first light emitting portion 31 reaches the predetermined region 14 of the container supporting portion 13. The user can place the container C in a certain region 14 of the container supporting portion 13 by confirming the light reaching the certain region 14 of the container supporting portion 13. [

The reason why the first light emitting unit 31 is turned on when the human body detection sensor 40 has reached the reference time in the present embodiment is that the first light emitting unit 31 is unnecessarily In order to prevent it from being turned on.

For example, the user may pass the water discharging device 1 without using the water discharging device 1. In this case, the human body detection sensor 40 senses the human body, but the time for sensing the human body will not reach the reference time. In this case, it is preferable that the first light emitting portion 31 is not turned on.

On the contrary, when the user desires to use the water discharging device 1, the user stands in front of the water discharging device 1. In this case, the time when the human body detection sensor 40 senses the human body reaches the reference time. Therefore, the first light emitting portion 31 is turned on and the light is irradiated, so that the light can guide the seating position of the container C.

After the first light emitting unit 31 is turned on, the controller 50 may determine whether the on time of the first light emitting unit 31 has passed a predetermined time (S5).

If it is determined in step S5 that the ON time of the first light emitting part 31 has passed a predetermined time, the controller 50 may turn off the first light emitting part 31 in step S6.

In the present embodiment, the predetermined time is a time for securing the time for the user to place the container C on the container supporting portion 13. [

According to the present embodiment, the first light emitting unit 31 can be turned off when a predetermined time elapses, regardless of whether water is discharged or not. Accordingly, it is possible to prevent an increase in power consumption due to an increase in the ON time of the first light emitting portion 31.

5 is a view for explaining a control method of the first light emitting unit according to another embodiment of the present invention.

The present embodiment is the same as the previous embodiment in the other portions, but differs at the time when the first light emitting portion is turned off after being turned on. Therefore, only the characteristic parts of the present embodiment will be described below.

Referring to FIG. 5, the first light emitting unit 31 is turned on through steps S2 and S3 of FIG. 4 (S4).

The control unit 50 may determine whether a water discharge command is input through the input unit 12 in step S11.

In this embodiment, the water discharge command may be input when one of the cold water button, the hot water button, and the constant button is selected a plurality of times.

Alternatively, any one of the cold water button, the hot water button, and the water purification button may be selected and a separate eject button may be selected.

Alternatively, any one of the cold water button, the hot water button, and the water purification button may be selected, and a mechanical lever may be pressed.

Alternatively, the cold water button, the hot water button, or the constant button may be entered when the lever or eject button is selected in the unselected state.

It should be noted that there is no limitation in the input method of the water discharge command in this specification.

If it is determined in step S11 that a water discharge command has been input, the controller 50 may turn off the first light emitting unit 31 (S6).

If it is determined in step S11 that the water discharge command has not been input, the controller 50 may determine whether the human body is sensed by the human body sensor 40 in step S12.

If it is determined in step S12 that the human body is not detected by the human body detection sensor 40, the controller 50 may turn off the first light emitting part 31 in step S6.

That is, in the present embodiment, when the user inputs a water discharge command for discharging water, or if the water discharge command is not input, the first light emitting portion 31 Off.

Alternatively, when the water discharge command is inputted in the state that the first light emitting portion 31 is on, the first light emitting portion 31 is not turned off and remains on, and when the water discharge is completed, (31) can be turned off.

Hereinafter, a control method of the second light emitting unit will be described.

6 is a view for explaining a control method of the second light emitting unit according to an embodiment of the present invention.

Referring to FIG. 6, the water discharge device 1 waits for the discharge of water (S20). A type button for selecting the temperature of the water to be extracted while the water discharger 1 waits for the discharge of water may be selected (S21).

The control unit 50 determines whether the hot water button is selected (S22).

If it is determined in step S22 that the hot button is selected, the second light emitting unit 32 may emit light of the first color (S23). For example, the first color may be red.

Accordingly, the user can intuitively confirm that the user selected the hot water button by checking the light of the first color.

If it is determined in step S22 that the hot water button is not selected, the controller 50 may determine whether the cold water button is selected (step S24).

As a result of the determination in step S24, if it is determined that the cold water button is selected, light of the second color may be emitted from the second light emitting unit 32 (S25). For example, the second color may be blue (S25).

Thus, the user can intuitively confirm that he / she has selected the cold water button by confirming the light of the second color.

If it is determined in step S24 that the cold water button is not selected, the second light emitting unit 32 may emit light of the third color (S26). For example, the third color may be green or white.

Accordingly, the user can confirm intuitively that the user has selected the integer button by checking the light of the third color.

While the light is being emitted from the second light emitting unit 32, the user can determine whether the water discharge is completed (S27).

If it is determined in step S27 that the water discharge is completed, the second light emitting unit 32 may be turned off (S28).

According to the present embodiment, since different colors can be illuminated in the second light emitting portion corresponding to the button selected by the user, the user can intuitively confirm the button selected by the user.

In the present embodiment, it is assumed that the user inputs a water discharge command after the second light emitting unit 32 is turned on. However, when a predetermined time has elapsed after the second light emitting unit 32 is turned on, The portion 32 can be turned off.

Alternatively, if the button corresponding to the color of the light emitted from the second light emitting portion 32 is selected again after the second light emitting portion 32 is turned on, the second light emitting portion 32 may be turned off.

For example, if the hot water button is selected again while the first color light is being emitted from the second light emitting portion 32 by the selection of the hot water button, the second light emitting portion 32 may be turned off.

Or if the human body is not sensed by the human body sensor 40 after the second light emitting unit 32 is turned on, the second light emitting unit 32 may be turned off.

Alternatively, when the second light emitting unit 32 is turned on and the water discharge command is input, the second light emitting unit 32 may be turned off.

In this embodiment, the first light emitting unit 31 and the second light emitting unit 32 may be turned on at the same time for a predetermined period of time.

Additional embodiments are suggested.

In the present invention, the second light emitting portion is omitted, and the light emitted from the first light emitting portion 31 guides not only the seating position of the container C but also the temperature of the cold water, the hot water, have.

For example, when the temperature of the hot water is within the first temperature range, the first light emitting portion 31 may be turned on, but the first color light may be irradiated. If the temperature of the hot water is higher than the first temperature range , The first light emitting portion 31 can illuminate the second color range.

Accordingly, the user can intuitively check the temperature of the water by checking the color of the light emitted from the first light emitting part 31. [

As another example, the second light emitting unit may display the temperature of the water corresponding to the type button selected by the user, without illuminating the light for confirmation of the button selected by the user.

For example, when the user selects the hot water button, the second light emitting unit 32 can irradiate lights of different colors based on the temperature of the hot water. That is, when the temperature of the hot water is within the first temperature range, the second light emitting portion 32 is turned on, but can emit light of the first color, and when the temperature of the hot water is higher than the first temperature range, 2 temperature range, the second light emitting portion 32 can emit light of the second color.

As another example, the light emitted from the first light emitting portion 31 can guide the position of the container C and display the state of the filter.

For example, when the filter is not required to be replaced, the first light emitting portion 31 emits light of the first color, and when the filter needs to be replaced, the second color light may be emitted.

As another example, when the water discharge device includes a water storage part for storing water, at least one of the first light emitting part and the second light emitting part may display the water level of the water storage part.

As another example, the water discharge device may further include an ice maker for generating ice and an ice discharger for discharging the generated ice.

In this case, at least one of the first light emitting portion and the second light emitting portion may indicate a state of ice. For example, when the generation of ice is completed or the ice storage portion is filled with ice, light of the first color is emitted from the first light emitting portion, and if ice is being produced or ice is not filled in the ice storage portion Light of a second color can be irradiated.

As another example, the water discharging device may be a refrigerator. In the case of a refrigerator, it may include a main body having a storage chamber and a door for opening and closing the storage chamber. At this time, a discharge port, a first light emitting portion, a second light emitting portion, a human body detection sensor, and the like may be installed in the housing of the door.

At least one of the first light emitting portion and the second light emitting portion may indicate a temperature of a storage room (a refrigerator compartment or a freezer compartment).

When the refrigerator is capable of discharging ice, at least one of the first light emitting unit and the second light emitting unit can display the state of ice.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: main body 13:
20: exhaust port 31: first light emitting portion
32: second light emitting unit 50:

Claims (9)

A housing having a recessed space in which a container capable of containing water can be located;
A discharge port through which the water can be discharged into the recessed space;
An input unit for selecting a temperature of water to be discharged from the discharge port;
A container support capable of supporting a container located in the recessed space;
A sensing sensor for sensing the approach of the human body to the periphery of the housing;
A first light emitting unit disposed outside the outlet and separately provided to the housing, the first light emitting unit irradiating light to a predetermined region of the container supporting unit to guide the container mounting position on the container supporting unit;
A second light emitting unit provided in the housing, the second light emitting unit irradiating light of one color among a plurality of colors corresponding to the temperature of one of the selected hot water, cold water and purified water through the input unit to the container supporting unit; And
And a control unit for determining whether the first light emitting unit is turned on based on the information detected by the detection sensor,
Wherein the control unit turns on the first light emitting unit when the time when the approach of the human body is detected by the detection sensor reaches a reference time. The method according to claim 1,
Wherein the first light emitting portion irradiates light to a portion where the water discharged from the outlet is dropped on the container supporting portion or to a periphery of the portion. The method according to claim 1,
Wherein a mark for guiding a seating position of the container is provided in a predetermined region of the container supporting portion irradiated with the light of the first light emitting portion. The method according to claim 1,
A water discharge command is input in a state in which the first light emitting unit is turned on,
Wherein the control unit turns off the first light emitting unit when the water discharge command is input and the water discharge is completed. The method according to claim 1,
When the second light emitting unit is turned on, a water discharge command is input,
Wherein the second light emitting unit is turned off when a water discharge command is inputted and water discharge is completed. A housing having a recessed space in which a container capable of containing water can be located;
A discharge port through which the water can be discharged into the recessed space;
An input unit for selecting a temperature of water to be discharged from the discharge port;
A container support capable of supporting a container located in the recessed space;
A sensing sensor for sensing the approach of the human body to the periphery of the housing;
A first light emitting unit disposed outside the outlet and separately provided to the housing, the first light emitting unit irradiating light to a predetermined region of the container supporting unit to guide the container mounting position on the container supporting unit;
A second light emitting unit provided in the housing, the second light emitting unit irradiating light of one color among a plurality of colors corresponding to the temperature of one of the selected hot water, cold water and purified water through the input unit to the container supporting unit; And
And a control unit for controlling the first light emitting unit and the second light emitting unit,
A water discharge command is input in a state in which the first light emitting unit is turned on,
Wherein the control unit turns off the first light emitting unit when the water discharge command is input and the water discharge is completed. A housing having a recessed space in which a container capable of containing water can be located;
A discharge port through which the water can be discharged into the recessed space;
An input unit for selecting a temperature of water to be discharged from the discharge port;
A container support capable of supporting a container located in the recessed space;
A sensing sensor for sensing the approach of the human body to the periphery of the housing;
A first light emitting unit disposed outside the outlet and separately provided to the housing, the first light emitting unit irradiating light to a predetermined region of the container supporting unit to guide the container mounting position on the container supporting unit;
A second light emitting unit provided in the housing, the second light emitting unit irradiating light of one color among a plurality of colors corresponding to the temperature of one of the selected hot water, cold water and purified water through the input unit to the container supporting unit; And
And a control unit for controlling the first light emitting unit and the second light emitting unit,
When the second light emitting unit is turned on, a water discharge command is input,
Wherein the second light emitting unit is turned off when a water discharge command is inputted and water discharge is completed. The method according to claim 1,
Wherein the second light emitting unit is turned off when the second light emitting unit is turned on and the detection sensor does not detect a human body. The method according to claim 1,
Wherein the first light emitting unit and the second light emitting unit can be simultaneously turned on for a predetermined time.

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