JP5563708B1 - LED lighting device - Google Patents

Abstract

By controlling the driving signal of a sensor that detects a human body or the like, the detection distance by the sensor can be made constant regardless of the lighting / extinguishing state of the LED lighting device, and the lighting / extinguishing of the LED lighting device can be performed An object of the present invention is to provide an LED lighting device that can be automatically and stably performed.
An LED lighting device includes an LED board on which an LED element is mounted, a translucent cover that covers the LED board, a lighting unit that drives the LED element to light, and a blinking operation of the LED element. And a sensor unit to be controlled. The sensor unit includes a light emitting element and a light receiving element. The detection level determining unit 102 determines the state of the LED element 23, and the reference driving frequency generated by the reference driving frequency generating unit 103 is used as, for example, a driving signal for the light emitting element. Is controlled by the duty control unit 104 to a drive signal having a duty ratio corresponding to the state of the LED element 23, and the blinking operation of the LED element 23 is controlled by changing the detection level of the light receiving element.
[Selection] Figure 12

Description

  The present invention relates to an LED illuminating device using an LED element as a light source, and more particularly, to a point light reducing operation of a light source in a direct-attached LED illuminating device that is directly attached to a ceiling surface or a side wall.

  2. Description of the Related Art In recent years, due to an increase in environmental awareness, a self-powered light bulb type LED lamp using an LED element excellent in power saving as a light source has been widespread. More recently, lighting devices using LED elements have been developed and introduced into the market for ceiling-mounted downlights and ceiling-mounted ceiling lights.

  As a use of an illuminating device that is directly attached to a ceiling surface or a side wall, a basin device that automatically turns on / off illumination is provided. For example, in a basin apparatus having a basin, a vanity for holding the basin, and a human body detection unit that outputs a human body detection signal when a user approaches the basin, the human body detection unit is a basin. There has been proposed a basin device that is installed in the main body and controls the illumination attached to the basin device (see, for example, Patent Document 1).

  The wash basin device described in Patent Document 1 can automatically illuminate the vanity when the user approaches to use the wash basin. Even if it is out of reach, it can automatically illuminate. Moreover, it is said that it is an easy-to-use wash basin apparatus by changing the illumination intensity of illumination or switching the threshold of human body detection.

  Meanwhile, a human body detection unit that detects the presence or absence of a human body in the detection area, and a control unit that controls lighting states of one or more lighting loads based on detection information in the human body detection unit, the control unit includes: There has been proposed an illumination control device in which the lighting state of an illumination load is varied according to the time during which the human body detection unit detects the presence of a human body in a detection area (see, for example, Patent Document 2).

  The lighting control device described in Patent Document 2 has an effect of obtaining an appropriate lighting environment without waste according to the presence time of the person by changing the lighting state of the lighting load according to the presence time of the person. It is said that there is.

  Thus, the presence of a human body is detected by human body detection to control the lighting state of the lighting device. In the lighting devices described in Patent Documents 1 and 2, the lighting device is turned on / off, etc. Since the detection distance for human body detection varies depending on the external brightness due to the above, there is a problem that it becomes difficult to control the lighting / extinguishing state at a certain detection distance.

JP 2003-24225 A Japanese Patent Laid-Open No. 10-125477

  The problem to be solved by the present invention has been proposed in view of the above-mentioned problems. Regardless of the lighting / extinguishing state of the LED lighting device by controlling the driving signal of a sensor for detecting a human body or the like. An object of the present invention is to provide an LED lighting device that can make the detection distance by a sensor constant and can automatically turn on / off the LED lighting device stably.

In order to solve the above problem, in the invention according to claim 1, an LED board on which an LED element is mounted, a translucent cover that covers the LED board, and a lighting unit that drives the LED element to light A sensor unit that has a light emitting element and a light receiving element, and controls a point reduction operation of the LED element by changing a detection level of the light receiving element by a drive signal control unit that controls a drive signal of the light emitting element.
The drive signal control means sets the driving current of the light emitting element in response to the sensor operation mode setting, in response to the on / off status of the LED elements, the reference drive signal when the LED elements are lit The duty ratio is increased, and when the LED element is turned off, the duty ratio of the reference drive signal is decreased to control the driving of the light emitting element.
The reflected light of the emitted light from the light emitting element controlled by the drive signal control means is detected by the light receiving element, and the blinking operation of the LED element is controlled.

In the invention according to claim 2, the LED board on which the LED element is mounted, a translucent cover that covers the LED board, a lighting unit that drives and drives the LED element, a light emitting element, and a light receiving element A sensor unit that controls a point reduction operation of the LED element by changing a detection level of the light receiving element by a driving signal control unit that controls a driving signal of the light emitting element.
The drive signal control means sets the drive current of the light emitting element according to the sensor operation mode setting, and at the reference drive frequency when the LED element is lit according to the lighting / extinction status of the LED element. When the LED element is turned off, the driving of the light emitting element is controlled by making it lower than a reference driving frequency,
The reflected light of the emitted light from the light emitting element controlled by the drive signal control means is detected by the light receiving element, and the blinking operation of the LED element is controlled.

  According to a third aspect of the present invention, in the LED lighting device according to the first or second aspect, the sensor operation mode switches and sets a detection distance of the light receiving element. .

  According to the first to third aspects of the invention, by controlling the driving signal of the sensor that detects a human body or the like, the detection distance by the sensor can be made constant regardless of the lighting / extinguishing state of the LED lighting device. It is possible to provide an LED lighting device that can stably and automatically turn on / off the LED lighting device. Moreover, the specific effect demonstrated by embodiment of this invention described below is acquired.

External perspective view of LED lighting device according to the present embodiment The exploded perspective view of the LED lighting device concerning this embodiment Sectional drawing of the LED lighting apparatus concerning this embodiment External perspective view of the housing according to the present embodiment The exploded perspective view of the lighting unit concerning this embodiment External perspective view of sensor unit and sensor unit cover according to this embodiment The exploded perspective view of the sensor unit concerning this embodiment External perspective view of sensor unit cover according to this embodiment The perspective view inside the housing | casing edge part concerning this embodiment External perspective view of end cover according to this embodiment Drive waveform explanatory diagram according to the first embodiment Block circuit diagram according to the first embodiment Operation flow diagram according to the first embodiment Drive waveform explanatory diagram according to the second embodiment Block circuit diagram according to the second embodiment Operation flow diagram according to the second embodiment

  Preferred embodiments of the present invention will be described below in detail with reference to the drawings. This embodiment is an example, and the present invention is not limited to this.

  1 to 3 show one embodiment of the LED lighting device 100 of the present invention, and the LED lighting device 100 according to this embodiment includes a ceiling surface, a side wall and the like as shown in FIGS. The LED lamp main body 2 fixed to the to-be-attached part 5 is provided.

  As shown in FIGS. 1 and 2, the LED lighting device 100 includes an LED on a mounting portion 5 such as a ceiling surface or a side wall provided with a through hole 5 a having a diameter of 15 mm from which an external power line (F cable) 4 protrudes. The power supply holes 21b of the casing 21 of the lamp body 2 are combined and fixed in the direct attachment holes 21c of the casing 21 by fixing means such as screws. One of the direct attachment holes 21c is a dart hole, and has a structure that facilitates fixing work. When the LED lamp body 2 is fixed, the LED lamp body 2 and the external power supply line 4 are connected using the quick connection terminal 7, and the LED lighting device 100 can be used.

(1. LED lamp body)
As shown in FIGS. 1 to 3, the LED lamp main body 2 is connected to a casing 21 and an external power supply line 4 housed in the casing 21 to turn on the first LED element (LED element) 23. A lighting unit 27 comprising a lighting substrate 27e (FIG. 5) on which various electronic components constituting a lighting circuit to be mounted are mounted, a sensor unit 28 in which a switch and a sensor unit are installed, and a plurality of first LED elements 23 The LED board 22 on which the LED board 22 is mounted, the lighting unit cover 25 that covers the lighting unit 27, and the translucent cover 24 that covers the opening of the housing 21 at the position where the LED board 22 is disposed.

(2. Housing)
As shown in FIGS. 2 to 4, the casing 21 has a substantially rectangular shape as a whole, and is formed by integral molding by aluminum extrusion. The casing 21 has a rectangular upper surface portion 21i, a rear surface portion 21h extending vertically from one side in the width direction of the upper surface portion 21i, and a vertical portion extending from the central portion of the upper surface portion 21i so as to face the rear surface portion 21h. The center portion 21f that protrudes and the front portion 21d that extends perpendicularly from the other side in the width direction of the upper surface portion 21i are roughly configured. The power supply hole 21b and the direct attachment hole 21c described above are opened in the upper surface portion 21i. The inside of the housing 21 is divided into an LED substrate storage portion and a lighting unit storage portion by the central surface portion 21f. The central surface portion 21f does not need to be disposed in the inner central portion of the housing 21, and the arrangement position can be changed according to the configuration ratio of the LED substrate or the lighting unit.

  The upper end portions of the front surface portion 21d and the back surface portion 21h protrude from the upper surface portion 21i, and a convex portion 21j protrudes from the upper surface portion 21i corresponding to the central surface portion 21f. Thereby, when fixing to the to-be-attached parts 5, such as a ceiling surface and a side wall, the uneven | corrugated | grooved part of the to-be-attached part 5 can be absorbed and fixed.

  A concave substrate mounting portion 21e for mounting the LED substrate 22 is provided on the upper surface 21i side inside the housing of the central surface portion 21f and the front end portion 21d, and the LED substrate 22 is slid and mounted. . Similarly, a pair of concave light-transmitting cover mounting portions 21r for mounting the light-transmitting cover 24 is provided on the open end side of the central surface portion 21f and the front end portion 21d. It is inserted by sliding. Further, a pair of concave and convex mounting portions 21s for mounting the lighting unit cover 25 and the sensor unit cover 29 is provided on the open end side of the central surface portion 21f and the back surface portion 21h. The unit cover 29 is inserted by sliding. The lighting unit cover 25 can also be fixed by bending it.

  Further, the inner surface side of the central surface portion 21f and the front surface portion 21d of the housing 21 on the mounting surface side of the first LED element 23 is made a glossy surface, a high reflection sheet is bonded, a high reflection resin By applying, the irradiation light of the first LED element 23 is repeatedly reflected between the inner surface of the central surface portion 21f and the front surface portion 21d, thereby improving the light reflection efficiency and improving the light extraction efficiency.

A convex positioning portion 21g is provided on the inner side of the upper surface portion 21i of the casing 21 that houses the lighting unit 27 in parallel with the longitudinal direction of the casing 21, and is fitted to the concave portion of the lighting unit 27. Thus, positioning can be performed. Since the convex shape of the positioning portion 21g increases the thickness of the aluminum of the portion, a screw groove is cut in the positioning portion 21g and a screw for fixing the lighting unit 27 is directly inserted into the positioning portion 21g. It can be fixed. Similarly, although not shown in the drawing, the both ends in the longitudinal direction of the housing 21 are formed with recesses made of aluminum so that screws can be inserted into a plurality of locations where the end covers 26a and 26b are fitted. Screws for fixing the end covers 26a and 26b can be directly inserted and fixed. Thereby, it can fit easily, workability | operativity improves, and the cost which provides a man-hour and a screw insertion part can be reduced.
Moreover, the wiring fastener 8 (FIG. 2) for fixing wiring is provided inside the housing | casing 21 between the lighting unit 27 and the sensor unit 28, and wiring arrangement | positioning of the housing | casing 21 can be performed.

(3. LED board)
As shown in FIGS. 2 to 3, the LED substrate 22 has a rectangular shape and is mounted by mounting the first LED element 23 and slidingly inserting it into the substrate mounting portion 21 e of the housing 21. ing. Thereby, since the LED board 22 is contacting the housing | casing 21, it is possible to radiate the heat | fever of the 1st LED element 23, and to suppress a temperature rise. On the lower surface of the LED substrate 22, the first LED elements 23 are arranged in a line in the center of the casing 21 in the longitudinal direction. A substrate connection terminal 22 a (FIG. 9) is provided at one end of the LED substrate 22 and is electrically connected to the lighting unit 27.

Moreover, light extraction efficiency can be improved by bonding a highly reflective sheet to the mounting surface side of the first LED element 23 of the LED substrate 22 or applying a highly reflective resin.
In addition, as the 1st LED element 23 mounted in this LED board 22, a well-known various LED element, an organic EL element, etc. can be used. In the illustrated embodiment, a high-luminance LED element that emits white light for illumination is used.

(4. Translucent cover)
The translucent cover 24 is molded into a rectangular shape using polycarbonate. As shown in FIGS. 2 to 3, the translucent cover 24 is formed by sliding and inserting end portions in the longitudinal direction into the recessed portions provided at the end portions of the front portion 21 d and the central surface portion 21 f of the housing 21. The end portion is fitted and fixed by the end portion cover 26.

As shown in FIGS. 2 to 3, the translucent cover 24 is subjected to embossing to form a light diffusing surface having a high density on the translucent cover 24, or the material is made to contain a diffusing agent. , The light can be irradiated uniformly. Further, the light reflected by the translucent cover 24 is diffusely reflected and further reflected by the front surface portion 21d and the central surface portion 21f of the housing 21, and this can be repeated to make the entire surface of the translucent cover 24 shine. The light source is uniformly irradiated with light.
Thus, the light from the first LED element 23 can be uniformly irradiated on the entire surface of the translucent cover 24.

(5. Lighting unit)
As shown in FIGS. 2 to 3 and 5, the lighting unit 27 is installed on the positioning portion 21 g inside the upper surface portion 21 i of the housing 21. The lighting unit 27 includes a lighting circuit 27d for lighting the first LED element 23, an insulating cover 27c that protects the lighting circuit 27d, and a metal cover 27a. The lighting circuit 27d is composed of a lighting substrate 27e on which an electronic component 27f is mounted, and is connected to the external power line 4 at a power terminal block 27i. The lighting circuit 27d is covered with an insulating cover 27c made of polycarbonate in order to insulate it from the housing 21. The various electronic components 27f constituting the lighting circuit 27d are known electronic components such as various diodes, capacitors, ICs, resistors, and the like for performing overcurrent protection, noise cut, rectification, smoothing, dimming control, and the like. .

  Furthermore, the insulating cover 27c is covered with a metal cover 27a for blocking unnecessary noise outside. As shown in FIG. 5, the metal cover 27a has an L-shaped extension 27b as shown in FIG. 5, and the extension 27b at one or both ends has a wiring connector from the lighting circuit 27d. However, a substantially circular extraction hole 27g is formed across the end surface portion of the metal cover 27a and the extending portion 27b so that the metal cover 27a can be exposed to the outside. The concave portion 27h on the bottom surface of the extending portion 27b is fitted into the positioning portion 21g of the housing 21, and the extending portion 27b is fixed to the positioning portion 21g of the housing 21 with a screw. When the extending portion 27 b is fixed to the casing 21, the ground line from the lighting unit 27 is fixed to the casing 21 together. Thereby, it is possible to attenuate the noise generated from the lighting unit 27. An extraction hole 27g and an insertion hole 27j into which the external power supply line 4 is inserted are opened at one end surface portion in the length direction of the metal cover 27a and the insulating cover 27c.

  Further, as a method of fixing the lighting unit 27 to the casing 21, in addition to the above-described fixing method using screws, the lighting unit 27 is slid into the casing 21 and is connected to the rear portion 21h of the casing 21. It is also possible to arrange and fix a spring.

(6. Lighting unit cover)
The lighting unit cover 25 is molded into a rectangular shape using polycarbonate. As shown in FIGS. 2 to 3, the lighting unit cover 25 is bent and inserted between the back surface portion 21 h and the central surface portion 21 f of the housing 21 and fitted. Thereby, it is possible to make the lighting unit 27 and its wiring invisible from the outside.

(7. Sensor unit)
As shown in FIG. 1, the sensor unit 28 is arranged so that the surface portion (surface portion of a sensor unit cover 29 described later) is substantially flush with the surface of the translucent cover 24, as shown in FIG. A second LED element (light emitting element) 28d for transmitting an optical signal and a light receiving element 28e for receiving light reflected from the substance by the light emitted from the second LED element 28d are integrally provided. Yes.

  As shown in FIGS. 2 and 6 to 7, the sensor unit 28 has one end opened, and a claw having a sensor substrate 28 c sandwiched between a rectangular sensor cover member 28 a made of polycarbonate. It is sandwiched and fixed by 28m. Thereby, man-hours and costs can be reduced. The sensor cover member 28a is insulated from the sensor window 28i that transmits light from the outside, the slide switch window 28j for bringing the operation portion of the slide switch 28f to the outside, and the terminal of the switch 29a (FIG. 8). For this purpose, a switch insulating portion 28k is provided. A second LED element 28d, a light receiving element 28e, a slide switch 28f, and a sensor connection terminal 28g are mounted on the surface of the sensor board 28c, and an electronic component 28h (FIG. 6) is mounted on the back surface of the sensor board 28c.

  Thereby, since LED and a light receiving element are mounted and integrated on one board | substrate, size reduction and thickness reduction can be achieved and a man-hour and cost can be reduced.

  Furthermore, the second LED element 28d and the light receiving element 28e are covered with a sensor protective cover 28b made of black silicon so that the light of the second LED element 28d does not leak to the light receiving element 28e and malfunction. . The sensor protective cover 28b includes a substantially cylindrical LED storage portion 28o and a light receiving element storage portion 28p having a substantially cubic shape, and the inside of the LED storage portion 28o and the light receiving element storage portion 28p is partitioned by a partition surface 28s. . Further, openings 28q and 28r exposing the tops of the second LED element 28d and the light receiving element 28e are opened on the upper surface of each of the storage portions 28o and 28p. A sensor connection terminal 28 g (FIG. 6) is provided on the sensor substrate 28 c and is electrically connected to the lighting unit 27. Accordingly, since the second LED element 28d and the light receiving element 28e are partitioned by the partition surface 28s inside the sensor protective cover 28b, the mutual influence can be reduced, malfunctions can be prevented, and the operation accuracy can be improved. it can.

  The light emitted from the second LED element 28d is emitted to the outside through the sensor window 28i, and the light reflected by the reflecting material such as the hand outside is again transmitted through the sensor window 28i and the light receiving element 28e. And is reflected by the sensor substrate 28c. Thereby, it has the structure which controls ON / OFF of the LED lamp main body 2. FIG. The slide switch 28f is a switch that can be set in three settings, and is used in three modes in the present embodiment. The first mode is OFF (no sensor control), the second mode is ON (sensor control is performed but the sensor detection distance is short), and the third mode is ON (sensor control). However, the sensor detection distance is long).

(8. Sensor unit cover)
As shown in FIGS. 2, 6, and 8, the sensor unit cover 29 is formed into a rectangular substantially flat plate shape. The sensor cover member 28a of the sensor unit 28 is fixed to the sensor unit cover 29, and the sensor unit cover 29 is inserted between the back surface portion 21h and the central surface portion 21f of the housing 21 by sliding. Thereby, it becomes possible to make the sensor unit 28 invisible from the outside. The sensor unit cover 29 serves as a surface cover of the sensor unit 28, and the flat portion thereof is disposed so as to be substantially flush with the translucent cover 24.
The sensor unit cover 29 has a switch 29a for turning on / off the LED lamp body 2, a sensor opening 29b fitted to the sensor window 28i, and a slide switch opening 29c for allowing the slide switch 28f to be operated from the outside. , Provided.

(9. End cover)
As shown in FIGS. 2 and 9 to 10, the end covers 26 a and 26 b cover the both ends of the housing 21 and constitute the LED lamp body 2. The end covers 26 a and the end covers There are two types of end cover 26b provided with a cover extension 26c. The end cover 26b is formed with an extending portion 26c bent in an L shape. The extending portion 26c is provided with a cable opening 26d so that the external power supply line 4 can be supplied from the back surface portion 21h. Yes. The cable opening 26b is closed with a closing plate that can be broken by pressing before use. Thereby, a cable can be inserted into the LED lighting device 100 from other than the upper surface, and can be used for various purposes.

  The end cover 26a is fitted to each end face of the housing 21, the LED substrate 22, the translucent cover 24, and the sensor unit cover 29, and is fixed to the housing 21 with cover screws. At this time, as shown in FIG. 9, the wiring opening provided at the end of the central surface portion 21 f of the housing 21 is used to wire the wire connecting the board connection terminal 22 a of the LED board 22 and the lighting unit 27. The part 21m is sealed with a sealing plug 21n made of silicon rubber.

  Further, the end cover 26b is fitted to each end face of the casing 21 or the end cover insertion opening 21p, the LED substrate 22, the translucent cover 24, and the lighting unit cover 25, and is attached to the casing 21 with a cover screw. It is fixed. Thereby, LED lamp main body 2 becomes a structure fixed except lighting unit cover 25 used at the time of attachment, and can also produce the effect which prevents that a dust, an insect, etc. penetrate | invade.

(10. Reflection detection control)
The reflection detection control performed by the second LED element 28d, the light receiving element 28e, and the slide switch 28f mounted on the sensor unit will be described in detail. There are two methods for controlling the drive signal for driving the second LED element 28d by the detection control. The first method is a method of controlling by changing the duty ratio of the driving frequency, and the second method is a method of controlling by changing the driving frequency of the driving signal.

(10-1. First Embodiment)
As shown in FIG. 11 (a), the first method of controlling the duty ratio of the drive frequency is controlled by detecting the drive signal of the second LED element 28d when the LED lighting device is turned on. In the detection control when the LED illumination device is turned off by increasing the duty ratio, the drive is performed by decreasing the duty ratio of the drive signal of the second LED element 28d.
Thereby, when the LED lighting device is turned on, the ON time of the drive signal of the second LED element 28d is lengthened, and the sensitivity of the detection level of the light receiving element is increased. When the LED lighting device is turned off, the ON time of the drive signal of the second LED element 28d is shortened, and the sensitivity of the detection level of the light receiving element is lowered. Therefore, the detection distance of the reflected light can be set in the same manner regardless of whether the LED lighting device is turned on or off.

  The block circuit diagram shown in FIG. 12 will be described. In the LED lighting device 100, lighting control and detection control are performed by a microcomputer 101 (hereinafter abbreviated as a microcomputer). The microcomputer 101 controls the mode setting determination unit 105 that determines the mode set in the slide switch 28f, the detection level of the light receiving element 28e, and the lighting circuit 27d that lights the first LED element 23. A detection level determination unit 102 that detects and controls the on / off state of the first LED element 23 via the lighting control unit 106, and a reference driving frequency generation unit that divides the reference clock of the microcomputer 101 to generate a reference driving frequency. 103 and a duty control unit that converts the reference drive frequency generated by the reference drive frequency generation unit 103 into a duty ratio corresponding to the ON / OFF state of the first LED element 23 based on the output signal from the detection level determination unit 102 104. The light emitted from the second LED element 28d is output from the drive circuit 107 that drives the second LED element 28d by the pulse signal having the duty ratio controlled by the duty control unit 104 and the output signal from the mode setting determination unit 105. Based on this, drive control is performed by a drive current selection circuit 108 that selects a drive current (drive current corresponding to the above-described three modes).

  Then, based on a signal from the mode setting determination unit 105, the drive current selection circuit 108 selects a current for driving the second LED element 28d. The drive circuit 107 drives the second LED element 28d according to the signal from the duty control unit 104 to emit light. The light receiving element 28e detects the reflected light of the second LED element 28d, and the detection level determination unit 102 determines it. The lighting circuit 27d performs control to turn on / off the first LED element 23 based on the determination of the detection level determination unit 102 and the signal from the lighting control unit 106.

  The control flow shown in FIG. 13 will be described. First, when the power is turned on (Step 1), the microcomputer 101 operating at the reference clock of 2 MHz detects whether or not the setting mode of the slide switch 28f is changed (Step 2), and the current for driving the second LED element 28d is detected. Set (Step 3). Using the output port of the microcomputer 101, when in the first mode, the second LED element 28d is set not to pass current, and when set in the second and third modes, the second LED is set. The resistance value of the current value flowing through the element 28d is set by selection. Accordingly, when the second mode is set, the drive current is set to be smaller than when the third mode is set, and the second mode is set to have a shorter detection distance than the third mode. It becomes.

  After the mode setting in Step 3 or when there is no mode setting change in Step 2, the lighting / extinguishing status of the first LED element 23 is determined (Step 4), and when the first LED element 23 is lit, The microcomputer 101 creates a drive signal with a duty ratio of 29/51% at the reference drive frequency (Step 5), and when the first LED element 23 is turned off, the microcomputer 101 sets the duty ratio at the reference drive frequency. A 10/51% drive signal is generated (Step 6), and the second LED element 28d is driven (Step 7). Due to the difference in the duty ratio of the drive signal, the light emission amount of the second LED element 28d changes, and the detection sensitivity of the light receiving element 28e also changes. Further, by changing the duty ratio of the drive signal, reflection can be detected at the same detection distance regardless of whether the LED lighting device is turned on or off. When the light receiving element 28e detects whether or not the second LED element 28d receives reflected light (Step 8) and receives reflected light from a part of a human body such as a hand or an object, the first LED element 23 is turned on. The state is changed and changed in accordance with the previous state from lighting to turning off or from turning off to lighting (Step 9). When the reflected light is not received, the routine from step 1 is repeated.

  The detection distance by the sensor unit 28 is detected by controlling the drive signal of the second LED element 28d with a simple configuration that does not use an illuminance meter, in response to a problem that changes depending on whether the LED lighting device is turned on or off. The distance can be controlled. The duty ratio of the drive signal described here is an example of an optimum value obtained by an actual lighting device, and is not fixed to this value.

(10.-2 Second Embodiment)
As shown in FIG. 14, the second method of controlling by changing the drive frequency of the drive signal is when the light receiving element 28e normally drives the second LED element 28d at the reference drive frequency (38 kHz) Fs. The detection output voltage is set to the maximum VTh. Therefore, when the second LED element 28d is driven at a low frequency Fl deviating from the reference drive frequency or at a high frequency Fh, the detection output voltage of the light receiving element 28e drops and becomes VTl.
When the LED lighting device is turned on, the microcomputer 101 creates a drive signal having a reference drive frequency to drive the second LED element 28d. When the LED illumination device is turned off, the microcomputer 101 generates a drive signal having a frequency that is out of the reference drive frequency, and drives the second LED element 28d. The detection sensitivity of the light receiving element 28e changes due to the difference in the drive frequency of the drive signal. Therefore, the detection distance of the reflected light can be set in the same manner regardless of whether the LED lighting device is turned on or off.

  FIG. 15 shows a block circuit diagram in the case of controlling by changing the drive frequency of the drive signal. In this block circuit diagram, instead of the above-described duty control unit 104, the reference drive frequency generated by the reference drive frequency generation unit 103 based on the output signal from the detection level determination unit 102 is used to turn on / off the first LED element 23. A frequency control unit 109 that changes the frequency of the drive signal in accordance with the light-off state is provided, and the rest is the same as the block circuit diagram of FIG.

  Then, based on a signal from the mode setting determination unit 105, the drive current selection circuit 108 selects a current for driving the second LED element 28d. In accordance with a signal from the frequency control unit 109, the drive circuit 107 drives the second LED element 28d to emit light. The light receiving element 28e detects the reflected light of the second LED element 28d and makes the detection level determination unit 102 determine it. The lighting circuit 27d performs control to turn on / off the first LED element 23 based on the determination of the detection level determination unit 102 and a signal from the lighting control unit 106.

  FIG. 16 is a control flow in the case of controlling by changing the drive frequency of the drive signal, and Step 1 to Step 3 are the same as the control flow of FIG. When the first LED element 23 is lit in Step 4, the microcomputer 101 creates a drive signal of 38 kHz that is a reference drive frequency (Step 5), and drives the second LED element 28d. When the first LED element 23 is turned off, the microcomputer 101 creates a drive signal that deviates from the reference drive frequency (Step 6), and drives the second LED element 28d. Due to the difference in the frequency of the drive signal, the detection output voltage of the light receiving element 28e drops, and the detection sensitivity also changes. By changing the frequency of the drive signal, reflection can be detected at the same detection distance regardless of whether the LED lighting device is turned on or off. Step 7 to Step 9 are the same as the control float of FIG.

  As described above, according to the present invention, the second LED element 28d can be configured with a simple configuration that does not use an illuminance meter, with respect to the problem that the detection distance by the sensor unit 28 changes depending on whether the LED lighting device 100 is turned on or off. The detection distance can be controlled by controlling the drive signal.

(11. Operation)
The attachment method and operation method of the LED lighting apparatus 100 of this invention are demonstrated. First, the lighting unit cover 25 of the LED lamp body 2 is removed, and the external power supply line 4 of the attached portion 5 is inserted into the power supply hole 21 b and connected to the quick connection terminal 7. Using the direct attachment hole 21c of the LED lamp main body 2, the LED lamp main body 2 is fixed to the attached portion 5 by fixing means such as screws. Thereafter, the lighting unit cover 25 is fitted into the housing 21, and the attachment of the LED lighting device 100 is completed.
The LED illumination device 100 is turned ON / OFF by the switch 29a of the sensor unit cover 29. The sensor detection mode can be switched by a slide switch 28f operated from the slide switch opening 29c of the sensor unit cover 29. By turning on the detection mode by the sensor, the light from the second LED element 28d passes through the sensor cover member 28a and is irradiated from the sensor opening 29b of the sensor unit cover 29. The irradiated light is reflected by a hand or the like and is transmitted from the sensor opening 29b of the sensor unit cover 29 through the sensor cover member 28a and input to the light receiving element 28e. The ON / OFF operation of the LED lighting device 100 is performed according to the intensity of the input light.

(12. Other)
Although the LED lighting device 100 of the present invention has been described with respect to the form in which the upper surface portion 21i of the casing 21 is directly fixed to the mounted portion 5, it can be attached by providing a mounting plate separately. Thereby, it sets so that a user can select the attachment place of LED lighting apparatus 100 freely according to a use.

  As described above, in the present embodiment, the detection distance can be controlled by controlling the drive signal of the LED element with a simple configuration that does not use the illuminometer, and the man-hour and cost can be reduced by downsizing. It provides a thin LED lighting device with a good appearance and exhibits good design.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to these embodiment, Even if there is a design change of the range which does not deviate from the summary of this invention, it is included in this invention. That is, various changes and modifications that can be made by those skilled in the art are also included in the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied as an LED lighting device installed along a kitchen, a closet, a top plate such as a sink, a shelf bottom, a wall side surface, or the like.

2: LED lamp body 21: Housing 21b: Power supply hole 21c: Direct attachment hole 21d: Front part 21e: Substrate mounting part 21f: Central surface part 21g: Positioning part 21h: Rear part 21i: Upper surface part 21j: Convex part 21m: Wiring opening 21n: sealing plug 21p: end cover insertion opening 22: LED substrate
22a: Board connection terminal 23: First LED element (LED element)
24: Translucent cover 25: Lighting unit cover 26: End cover 26a: End cover A
26b: end cover B
26c: End cover extension 26d: Cable opening 27: Lighting unit 27a: Metal cover 27b: Extension 27c: Insulation cover 27d: Lighting circuit 27e: Lighting substrate 27f: Electronic component A
27 g: extraction hole 27 h: concave portion 27 i: power terminal block 27 j: insertion hole 28: sensor unit 28a: sensor cover member 28b: sensor protective cover 28c: sensor substrate 28d: second LED element (light emitting element)
28e: light receiving element 28f: slide switch 28g: sensor connection terminal 28h: electronic component B
28i: Sensor window 28j: Slide switch window 28k: Switch insulating part 28m: Claw claw 28o: LED storage part 28p: Light receiving element storage part 28q: Opening part 28r: Opening part 28s: Partition surface 29: Sensor unit cover 29a: Switch 29b : Sensor opening 29c: Slide switch opening 4: External power supply line 5: Mounted part 5a: Through hole 7: Fast connection terminal 8: Wiring fastener 100: LED lighting device 101: Microcomputer
102: detection level determination unit 103: reference drive frequency generation unit 104: duty control unit 105: mode setting determination unit 106: lighting control unit 107: drive circuit 108: drive current selection circuit 109: frequency control unit

Claims (3)

An LED board on which an LED element is mounted, a translucent cover that covers the LED board, a lighting unit that drives and drives the LED element, and a drive that has a light emitting element and a light receiving element and controls a drive signal of the light emitting element A sensor unit that controls a point reduction operation of the LED element by changing a detection level of the light receiving element by a signal control means,
The drive signal control means sets the driving current of the light emitting element in response to the sensor operation mode setting, in response to the on / off status of the LED elements, the reference drive signal when the LED elements are lit The duty ratio is increased, and when the LED element is turned off, the duty ratio of the reference drive signal is decreased to control the driving of the light emitting element.
The LED illumination device, wherein reflected light of light emitted from a light emitting element controlled by the drive signal control means is detected by the light receiving element, and the blinking operation of the LED element is controlled. An LED board on which an LED element is mounted, a translucent cover that covers the LED board, a lighting unit that drives and drives the LED element, and a drive that has a light emitting element and a light receiving element and controls a drive signal of the light emitting element A sensor unit that controls a point reduction operation of the LED element by changing a detection level of the light receiving element by a signal control means,
The drive signal control means sets the drive current of the light emitting element according to the sensor operation mode setting, and at the reference drive frequency when the LED element is lit according to the lighting / extinction status of the LED element. When the LED element is turned off, the driving of the light emitting element is controlled by making it lower than a reference driving frequency,
The LED illumination device, wherein reflected light of light emitted from a light emitting element controlled by the drive signal control means is detected by the light receiving element, and the blinking operation of the LED element is controlled.   The LED illumination device according to claim 1, wherein the sensor operation mode is for switching and setting a detection distance of the light receiving element.