Lighting device

Abstract

To solve the problem in which, while conventional devices simply irradiate ultraviolet light onto dirt to make it visible, when visible light is irradiated onto dirt, that is, in a bright environment, the effect of visualizing the dirt by irradiating it with ultraviolet light is low, also, if the lighting device that irradiates ultraviolet light is configured to be used while held in the hand, the user's hands are occupied by holding the lighting device, making it difficult to clean the dirt that has been made visible, and when the device is installed on a wall, the user may forget to turn off the ultraviolet LEDs.SOLUTION: UV LED control means is provided that turns off a UV LED after automatically lighting the UV LED for a predetermined period of time when a lighting LED is turned off by turning-off operation on an on / off switch, which turns on and off the lighting LED.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an illumination device that illuminates dirt by irradiating it with ultraviolet light. [Background technology]

[0002] Dirt is difficult to see under normal visible light, making it difficult to confirm. In contrast, when ultraviolet light is irradiated onto protein stains in particular, the stains become visible and easier to see (see, for example, Patent Document 1). Therefore, when cleaning stains, it is easier to clean them by irradiating them with ultraviolet light to make them visible. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-338043 A (Claim 1, paragraph

[0015] ) Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional devices, the dirt is visualized by simply irradiating it with ultraviolet light, but the effect of visualization is low even if ultraviolet light is irradiated on the dirt when the dirt is irradiated with visible light, i.e., under bright conditions. Also, if the lighting device for irradiating ultraviolet light is configured to be held in the hand, the hand is occupied by holding the lighting device, which creates a problem that cleaning to remove the visualized dirt is difficult.

[0005] In view of the above problems, an object of the present invention is to provide a lighting device that does not suffer from the above problems. [Means for solving the problem]

[0006] In order to solve the above problems, the lighting device according to the present invention is characterized in that, in a lighting device in which an ultraviolet LED that irradiates ultraviolet light is provided adjacent to an illumination LED that irradiates visible light, the lighting device further comprises an ultraviolet LED control means that automatically turns off the ultraviolet LED after turning on the ultraviolet LED for a predetermined period of time when the illumination LED is turned off by a turn-off operation of a light on / off switch that turns the illumination LED on and off.

[0007] It is desirable for ultraviolet light, which makes dirt visible, to be emitted in a situation where visible light is not being emitted, i.e., in a dark situation. Therefore, it was decided that the ultraviolet LED would be automatically turned on when the lighting LED is turned off. However, since ultraviolet light is difficult to detect with the naked eye, if it is necessary to turn off the ultraviolet LED, it is possible that the turning-off operation will be forgotten and the ultraviolet LED will continue to be lit for a long time. Therefore, it was decided that the ultraviolet LED will be turned off automatically after being lit for a specified period of time.

[0008] In addition, there may be cases where the ultraviolet LED is to be turned on separately from the illumination LED. In such a case, a switch for turning on the ultraviolet LED may be provided, but since turning on the ultraviolet LED has little effect on visualization of dirt when the illumination LED is turned on, it is preferable that the ultraviolet LED control means does not turn on the ultraviolet LED even if the switch is operated to turn on the ultraviolet LED.

[0009] Furthermore, for the same reason, when the illumination LED is turned on while the ultraviolet LED is turned on, it is desirable that the ultraviolet LED control means turns off the ultraviolet LED even before the specified time has elapsed. Effect of the Invention

[0010] As is clear from the above description, the present invention has a significant effect in making dirt visible because the ultraviolet LED is turned on while the illumination LED is turned off, and furthermore, it is possible to prevent forgetting to turn off the ultraviolet LED. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 shows a configuration of an embodiment of the present invention. [Diagram 2] Flow diagram showing UV LED on / off control DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Referring to FIG. 1, L is a wall cabinet installed above a kitchen sink. A lighting fixture 1 is installed on the underside of this wall cabinet L to ensure light during cooking. A lighting LED is built into this lighting fixture 1, and the built-in lighting LED is turned on and off by turning on and off a light on / off switch 11 provided on the left end. This light on / off switch 11 is a non-contact switch, and when an operator brings his / her hand close to this light on / off switch 11, the lighting fixture 1 detects this. Therefore, if the lighting LED is in an off state, the lighting LED is turned on by bringing a hand close to the light on / off switch 11, and when the hand is brought close to the light on / off switch 11 again in the on state, the lighting LED is turned off.

[0013] Reference numeral 2 denotes a lighting device according to the present invention, which has an ultraviolet LED built in that irradiates ultraviolet light (not shown). A non-contact lighting switch 21 similar to the light on / off switch 11 is provided on the right end. When the ultraviolet LED is off and a hand is brought close to the lighting switch 21, the ultraviolet LED turns on and ultraviolet light is irradiated from the lighting device 2, but the ultraviolet LED is configured to automatically turn off after a predetermined time has passed. Reference numeral 22 denotes a light detection sensor that detects the on / off state of the lighting LED in the adjacent lamp 1.

[0014] 1 shows a case where the lighting device 2 according to the present invention is added to an existing lighting fixture 1, but the lighting device 2 may be configured to incorporate a lighting LED and be installed to replace the existing lighting fixture 1. The present invention can also be applied to lighting in toilets, bathrooms, or dressing rooms, in addition to being installed on the underside of a kitchen wall cupboard L. In that case, both the on / off switch 11 and the on switch 21 are changed to be installed on the wall.

[0015] Next, the on / off states of the illumination LEDs and the ultraviolet LEDs will be described with reference to FIG.

[0016] As described above, the lighting fixture 1 waits until the light on / off switch 11 is turned on (S1), and when the light on / off switch 11 is turned on, the lighting LED in the lighting fixture 1 is turned on (S2). The lighting LED continues to be lit until the light on / off switch 11 is turned on again, and when the light on / off switch 11 is turned on again, the lighting LED is turned off (S4).

[0017] The light detection sensor 22 detects that the illumination LED has been turned off, and the illumination device 2 automatically turns on the ultraviolet LED (S5). Then, after the ultraviolet LED continues to be turned on for a predetermined period of time, the illumination device 2 automatically turns off the ultraviolet LED (S6, S7).

[0018] Next, a case where a lighting operation is performed on the lighting device 2 will be described.

[0019] As described above, the lighting device 2 is provided with the lighting switch 21, and when this lighting switch 21 is turned on (S8), if the adjacent lighting LED is on, the on operation of the lighting switch 21 is ignored, and only when the lighting LED is off, the process jumps to S5 and the ultraviolet LED is turned on. Although not shown in Fig. 2, if the on / off switch 11 is turned on while the ultraviolet LED is on, the ultraviolet LED is immediately turned off, and the process flows from S1 to S2 and the lighting LED is turned on.

[0020] The present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0021] 1 lamp 2. Lighting equipment 11-point off switch 21 Light switch 22 Light detection sensor

Claims

1. In an illumination device having an ultraviolet LED for irradiating ultraviolet light disposed adjacent to an illumination LED for irradiating visible light, the illumination device is characterized in that, when the illumination LED is turned off by a turn-off operation of a light-on / off switch for turning on and off the illumination LED, an ultraviolet LED control means is provided for automatically turning on the ultraviolet LED for a predetermined period of time and then turning off the ultraviolet LED.

2. 2. The lighting device according to claim 1, further comprising a light switch for turning on the ultraviolet LED, and the ultraviolet LED control means is configured not to turn on the ultraviolet LED when the lighting LED is turned on, even if the light switch is operated to turn on the ultraviolet LED.

3. 3. The lighting device according to claim 1, wherein the ultraviolet LED control means turns off the ultraviolet LED even before the predetermined time has elapsed when the illumination LED is turned on while the ultraviolet LED is turned on.

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