JP2013084518A - Dimming controlled led lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dimming controlled LED lighting fixture which, by using the internal human detection and peripheral environment illuminance sensors of the lighting fixture, can switch the brightness of lighting when the lighting fixture is lighted.SOLUTION: In an LED lighting fixture having an illumination purpose LED group consisting of one or more LEDs, the illumination light of the illumination purpose LED group is controlled by using an illuminance sensor which detects ambient illuminance and a human detection sensor which detects the presence of people. The LED lighting fixture comprises: a lighting control unit including a first lighting control unit which lights the illumination purpose LED group with prescribed low luminance; a second lighting control unit, when while lighted with prescribed low luminance, the human detection sensor detects the presence of a person when the peripheral environment illuminance is below a certain illuminance level, lights the illumination purpose LED group with prescribed high luminance for a prescribed period after human presence is detected; and a third lighting control unit which, when the prescribed period elapses, lights the illumination purpose LED group with the original prescribed low luminance; and a lighting state setting unit which generates a command to change the prescribed low luminance on the basis of user operation.

Description

  The present invention relates to a dimmable LED lighting device that can be turned on by switching the brightness at the time of lighting using a human sensor and a surrounding environment illuminance sensor in the lighting device.

  Conventionally, a control technique by pulse width modulation (PWM) that changes the lighting brightness of an LED by controlling the period of current flow without changing the value of the current flowing through the LED is well known, and LED lighting fixtures that apply this technique. Is already on the market.

JP 2008-310963 A

  When it is desired to change the brightness at the time of lighting of a commercially available LED lighting apparatus, it is generally performed by an operation of an infrared remote controller or the like. For this reason, there was an inconvenience that an infrared remote controller had to be always provided near the lighting fixture.

  In order to solve this problem, the present invention uses a human sensor and an ambient environment illuminance sensor mounted in a lighting fixture, and can adjust the brightness when the LED is turned on. It aims at providing a light type LED lighting fixture. Furthermore, the present invention provides a simple indication of lighting brightness when lighting equipment is switched using a component such as a built-in illuminance sensor without using an infrared remote controller or the like when switching the lighting brightness. It aims at providing the light control type LED lighting fixture which can switch.

  A dimmable LED lighting apparatus according to an aspect of the present invention includes an illumination LED group including at least one LED, and uses an illuminance sensor that detects illuminance of an ambient environment and a human sensor that detects a person. An LED lighting apparatus for controlling illumination light of the LED group for illumination, the first lighting control unit for lighting the LED group for illumination with a predetermined low luminance, and with the predetermined low luminance. When the human sensor detects a person with an ambient illuminance value equal to or lower than a certain illuminance value, the second lighting that turns on the illumination LED group with a predetermined high brightness for a predetermined period after detecting the person A lighting control unit including a control unit, a third lighting control unit that lights the LED group for illumination at the original low luminance after the predetermined period has elapsed, and the predetermined low level based on a user operation A command to change the brightness A lighting state setting unit for generating a command, in which comprises a.

  A dimmable LED lighting apparatus according to another aspect of the present invention includes an illumination LED group including at least one LED, and uses an illuminance sensor that detects the illuminance of the surrounding environment and a human sensor that detects a person. The LED lighting fixture that controls the illumination light of the illumination LED group, and when the human sensor does not detect a person, the first lighting control unit that turns off the illumination LED group, and When the human sensor detects a person with the ambient environment illuminance below a certain illuminance value with the illumination LED group turned off, the illumination LED group is determined in advance for a predetermined period after detecting the person. A lighting control unit including a second lighting control unit that turns on at a high brightness, and a third lighting control unit that returns the illumination LED group to the original extinguishing state after the predetermined period has elapsed, and for user operation Based on the predetermined high brightness A lighting state setting unit for generating a command for changing the those provided with the.

The figure which shows an example of a structure of the light control type | mold LED lighting fixture which concerns on the 1st Embodiment of this invention. The flowchart explaining the control program of the microcomputer which is a control part in the dimming type LED lighting fixture of the human body switching lighting type of 1st Embodiment. The flowchart explaining the routine of PD touch in FIG. The flowchart explaining the control program of the microcomputer which is a control part in the dimming type LED lighting fixture of the human lighting type of the 2nd Embodiment of this invention. 5 is a flowchart for explaining a PD touch routine in FIG. 4. FIGS. 6 to 11 are diagrams for explaining an illumination lighting control method by an illuminance sensor of an already-filed application, and FIG. 6 is a diagram illustrating a configuration example of a general outside light intake in a lighting fixture. The figure which shows the characteristic of the illumination intensity versus photocurrent of the illumination intensity sensor using a photodiode. The figure which shows the structure of the illumination intensity measurement circuit of the illumination intensity sensor using a photodiode. The figure which shows the illuminance change characteristic when the external light intake of the illuminance sensor using a photodiode is closed with a finger. The figure which shows the detailed illumination intensity change characteristic at the time of blocking the external light intake of the illumination intensity sensor using a photodiode with a finger. An example of a method for distinguishing and determining the state in which a human body or object is closed for a relatively long time from the illuminance change characteristic of the illuminance sensor, and the external light intake port is closed by a finger for the purpose of operation FIG. The figure which shows an example of the connection structure of the mechanical switch for implement | achieving the 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 6 thru | or FIG. 11 is a figure explaining the technique used as the foundation of the light control type LED lighting fixture which concerns on embodiment of this invention described below. Although FIG. 6 is also a conventional configuration example, the first embodiment of the present invention is also employed as a general configuration example. The basic technology is to control the dimming control by changing the duty ratio of the pulse width of the current flowing to the LED, holding the external light intake (also referred to as the daylighting unit) of the illuminance sensor for a certain period of time with the fingertip. An example in which a dimming command is made by performing an action of shielding external light is also included (referred to as PD touch, and the present technology is described in Japanese Patent Application No. 2010-229022 (unpublished)).

  In FIG. 6, (a) shows a part of the front view of the luminaire, and (b) shows a cross-sectional view taken along line AA of (a). External light passes through an external light introduction guide 51 inserted into a round hole formed in the decorative plate 52 and is received by the illuminance sensor IC4 on the printed circuit board 53.

  FIG. 7 shows the characteristics of illuminance versus photocurrent of an illuminance sensor using a photodiode. When the resistor RL is connected to the output terminal of the illuminance sensor IC4 as shown in FIG. 8 and the cathode of the illuminance sensor IC4 is connected to the power source Vdd, an output proportional to the ambient illuminance is generated at both ends of the resistor RL. Connect to the AD conversion input terminal of IC3.

  In an actual lighting fixture, as shown in FIG. 6, an illuminance sensor IC4 is attached. A cylindrical acrylic resin 51 is mounted on the illuminance sensor IC4, and ambient light outside the lighting fixture is taken into the illuminance sensor IC4. It is supposed to be. When the upper part of the outside light intake port including the cylindrical acrylic resin 51 is closed with a finger or the like, the output of the illuminance sensor IC4 changes greatly as shown in FIG.

  When the AD conversion cycle (synonymous with the AD conversion sampling period) of the microcomputer IC3 is Tad seconds, the output of the illuminance sensor IC4 is AD converted 1 / Tad times per second. FIG. 10 shows the state of the illuminance change characteristic when the external light inlet of the illuminance sensor using the photodiode is blocked with a finger. In the same figure, the state of “a” is the state before the illuminance sensor IC4 is blocked with a finger, “b” is completely blocked and the output of the illuminance sensor shows the lowest value, and “c” is the state where the finger is released. It shows the state returned to the original state.

  If the voltage change of a certain level or more occurs from the state of “I”, the external light intake port of the illuminance sensor is blocked with a finger, and then the state of the external light intake port is restored to the original state. By processing the above and viewing the result, a command signal for instructing some operation can be obtained. In this way, even if the lighting fixture does not have an operation knob, a command (command) for changing the lighting state of the lighting fixture from the unique change characteristic of the illuminance sensor output based on the finger operation (see FIG. 9). It becomes possible to obtain a control signal.

  As can be seen from FIG. 10, just comparing the AD conversion data for each cycle. Unable to judge slow output change of illuminance sensor. Therefore, n pieces of AD conversion data are held, that is, the past AD conversion data from the current t = 0 to the past AD conversion data before t = n / Tad is stored in the RAM area of the microcomputer IC3, and the previous AD conversion data is updated every cycle. Overwrite the old data in the cycle by shifting it forward. In this way, n data from the present time to n / Tad time before are always stored. Here, the data at both ends of t = 0 and t = −n / Tad are compared for each cycle, and if the difference between the data at both ends exceeds a certain value, it can be determined that the output of the illuminance sensor IC4 has suddenly changed. Is possible. When a person closes the outside light intake with a finger for a relatively short time for operation, the output of the illuminance sensor IC4 changes abruptly. This will be described below with reference to FIG.

  FIG. 11 distinguishes from the illuminance change characteristics of the illuminance sensor, distinguishing the front of the sensor from a state in which a human body or an object is closed for a relatively long time, and identifying and determining the state in which the outside light intake is closed by a finger for the purpose of operation. It is a figure explaining an example of the method to do. Now, let (1) be the point at which the finger is brought close to the outside light input of the illuminance sensor. At this point, both ends of a period for holding n pieces of AD conversion data (that is, t = 0 and t = −n / Tad). There is almost no difference in data. Furthermore, if the finger approaches the outside light intake and the output of the illuminance sensor begins to drop significantly (2), if the difference between the data at both ends is less than a certain value, the output of the microcomputer IC3 is No change occurs (that is, a predetermined command is not output from the microcomputer IC3). Furthermore, if the point at which the finger begins to close the outside light intake port almost completely is (3), the difference between the data at both ends exceeds a certain value at this point. Data at -n / Tad at this time is stored. Further, the timer function of the microcomputer is operated, and the time until it substantially coincides with the data at -n / Tad is measured. When the finger of the outside light intake port is separated, the output of the illuminance sensor IC4 returns to the return state. When (4) in FIG. 11 is restored and the elapsed time from (3) to (4) is relatively short t seconds (for example, 2 seconds), the illuminance sensor IC4 is clearly conscious with a finger or the like. Can be determined to have been blocked. As described above, if the restrictions on the elapsed time until AD conversion data processing (detection of a sudden drop in sensor output) and return are satisfied, the microcomputer IC3 determines that the illuminance sensor IC4 is blocked by a finger, and the microcomputer IC3 is determined. Operation output (command signal) will be started.

  That is, the output fluctuation of the illuminance sensor IC4 is verified by the difference between the current AD conversion data and the AD conversion data before n / Tad time, so that it is determined that the difference exceeds a predetermined value, and about a predetermined t seconds. If it can be determined that the value has returned to the original value in a short time, it is possible to reliably start a predetermined command on the assumption that the illuminance change characteristic for the operation purpose is detected.

  In this way, it is possible to realize an illumination lighting control method using an illuminance sensor that can give a command input (command) such as a dimming instruction to the microcomputer without using any knobs using the illuminance sensor.

[First Embodiment]
FIG. 1 is a diagram showing an example of the configuration of a dimming LED lighting apparatus according to the first embodiment of the present invention. A dimmable LED lighting apparatus 100 shown in FIG. 1 includes a power supply unit 10, a lighting LED group 20, a control unit 30 including a microcomputer, and a sensor unit 40.

The power supply unit 10 includes an AC / DC conversion circuit 11, a stabilized DC voltage generation circuit 12, and a constant voltage power supply generation circuit 13.
The sensor unit 40 includes a human sensor circuit 41 and an illuminance sensor circuit 42.

The power supply unit 10 is provided with AC power supply input terminals 0 and 1 of an AC power supply (AC) 100 V, and DC power supply output terminals V27, V5, and GND. GND is a ground terminal as a reference potential point.
The AC / DC conversion circuit 11 is a circuit that converts AC to DC by full-wave rectifying an AC power supply (AC) 100 V using a full-wave rectifier diode bridge DB. The AC line filter L1 and the capacitor C1 are EMI (electromagnetic interference) removal filters. ZNR is a surge absorbing element used for protecting electronic components due to overvoltage generated by lightning or the like.

  The stabilized DC voltage generation circuit 12 is a switching regulator circuit using a flyback transformer TR. The switching circuit IC1 includes a high-breakdown-voltage type power MOS transistor, and generates a DC voltage on the primary side of the transformer TR. Switching circuit at about 100 KHz, DC voltage rectified by the fast recovery diode D1 on the secondary side of the transformer TR is switched by a constant voltage diode ZD and a photocoupler PC connected in series to the anode side of the constant voltage diode By controlling the oscillation frequency of IC1, a constant DC voltage set by constant voltage diode ZD is obtained on the secondary side of transformer TR. The DC voltage on the secondary side is obtained by selecting the constant voltage diode ZD according to the number of LEDs connected in series in the illumination LED group 20 serving as a load. For example, when the value of the forward voltage Vf of one LED in the lighting LED group 20 is 3.3 V and eight are connected in series, an applied voltage of 3.3 × 8 = 26.4 V is required. . In this case, if the voltage 27V is selected as the constant voltage diode ZD, the TR secondary side output becomes 27V, and the LED group 20 can be turned on. The diode circuit D2 on the primary side of the transformer TR is configured such that a high voltage fast recovery diode and a 200V constant voltage diode are directly connected to each other, and when the power MOS transistor of the switching circuit IC1 is off. It functions as a power clamper for preventing the power MOS transistor from being destroyed by electromagnetic energy generated on the primary side of the transformer TR.

  The constant voltage power generation circuit 13 is a voltage generation circuit for supplying constant voltage power to the microcomputer IC 3, the human sensor circuit 41, and the illuminance sensor circuit 42. IC2 is a programmable shunt regulator. By setting the base voltage of the transistor Q1 to 5V, a constant voltage of approximately 5V is obtained as the output of the transistor Q1, and the above three circuits (IC3, 41, 42) are used. Power is used.

  The lighting LED group 20 includes an LED group in which one or more sets of LEDs connected in series are connected in parallel, and a switching transistor Q2 as a switching element connected in series to these parallel-connected LED groups. It consists of The LED group 20 may be a single LED. For example, a power MOS transistor is used as the switching transistor Q2. The power MOS transistor has the merit that it can be directly driven by the microcomputer IC3.

  The switching transistor Q2 as a switching element is a transistor for controlling the brightness of the lighting LED group 20, and the brightness can be changed by changing the duty ratio of the switching pulse width supplied to the gate of the transistor Q2. Dimming, fade-in lighting or fade-out lighting described later can be performed.

  The control unit 30 is connected to the microcomputer IC3 and the microcomputer IC3, and is connected to the switch SW2 for switching the lighting illuminance of the threshold value to be switched on by the human sensor PED, and the microcomputer IC3, and the human sensor PED is connected to the microcomputer IC3. And a switch SW3 for switching a timer time for turning on the LED group 20 after detecting a person. The microcomputer IC3 directly receives the human sensor output signal and the illuminance sensor output signal. In the microcomputer IC3, each input is AD-converted and compared with a predetermined threshold value in order to determine the significance of the human signal or the output value of the illuminance sensor. The switch SW2 is a lighting illuminance changeover switch, and the threshold value of the LED lighting illuminance can be switched using an external operation switch. When the switch SW2 is turned on, the ambient environment illuminance is set to be lit at a predetermined value of bright illuminance (for example, 30 LX) or less, and when the switch SW2 is off, the LED is lit at a predetermined value of dark illuminance (for example, 10 LX) or less. By setting in this way, the user can select an effective threshold value representing two types of darkness levels depending on the environment in which the LED lighting apparatus is installed.

  The switch SW3 is a switch for selecting the LED lighting time when the human sensor PED detects a person. In the present embodiment, for example, a 4-bit digital rotary switch is used. In addition to the digital rotary switch, the lighting time can be set by a variable resistor VR or by using a slide switch to select a certain time.

  When the human sensor PED detects a person with an ambient illuminance below a certain illuminance value in a state where the illumination LED group 20 is lit at a low luminance, the control unit 30 performs illumination for a predetermined period after detecting the person. The lighting control unit that controls the LED group 20 to be lit at a high constant luminance and to be lit at the original low luminance after a predetermined time has passed, and the output of the illuminance sensor IC4 is monitored, and the sudden change in the output is captured. A lighting state setting unit that generates a command for changing the low luminance of the lighting LED group 20.

  The human sensor circuit 41 is configured using a pyroelectric sensor. The pyroelectric sensor as the human sensor PED selectively takes in infrared rays emitted from the human body, converts the electric charges generated in the sensor into electric current, and converts the voltage into a current-effect transistor (FET) mounted therein. Is amplified by about 60 to 70 db by a two-stage amplifier, and the output is connected to the AD conversion human power terminal of the microcomputer IC3.

  The human sensor PED includes first to third terminals, and the output voltage of the output terminal V5 of the constant voltage power supply generation circuit 13 is connected to the first terminal via a resistor R8. A reference potential GND line is connected to the second terminal, and when a heat ray is detected, a weak detection voltage corresponding to this is output as a sensor output from the third terminal. The sensor output is amplified by a first stage amplification unit composed of an operational amplifier OP1, capacitors C8 and C7, resistors R12 and R11 through an input circuit composed of a resistor R9 and a parallel circuit of a resistor R10 and a capacitor C6. Amplified by a second stage amplification unit comprising R13, operational amplifier OP2, capacitor C10, resistor R14, resistor R15, and resistor R16, it is amplified and output several thousand times.

  The illuminance sensor circuit 42 is a circuit using an IC type illuminance sensor IC4 having a photodiode and a current amplification circuit, and the voltage across the resistor RL of the load of the illuminance sensor IC4 is connected to the above-described AD conversion human power terminal of the microcomputer IC3. Is done. The illuminance sensor IC4 is a type in which the output current of the sensor increases as the surrounding brightness increases.

  When the switch SW1 to which the microcomputer IC3 is connected is OFF, the dimming LED lighting apparatus 100 has a human body output from the human sensor circuit 41 and the lighting luminance of the LED group 20 for lighting from a low predetermined luminance set in advance. It can be switched to a high predetermined luminance.

  The LED group 20 is turned on with the brightness (luminance) set when the output of the illuminance sensor circuit 42 becomes equal to or less than a predetermined value (for example, 30 LX) of bright illuminance. For example, when the LED group 20 for illumination is lit with a brightness of a duty ratio of 25% and the person sensor circuit 41 detects a person, the LED group 20 is connected to the microcomputer IC3 with a brightness of a duty ratio of 100%. It is lit for the timer time set by the switch SW3, and is lit again at the original 25% brightness after the time is up. The brightness of the LED group 20 that is always lit at 30 LX or less can be changed by holding the external light intake of the illuminance sensor of the illuminance sensor circuit 42 (that is, the illuminance sensor lighting section) with a finger for a certain period of time (PD touch), The change can be easily completed by confirming the lighting brightness of the LED group 20 after the change.

Next, the control operation of the microcomputer will be described with reference to FIGS.
FIG. 2 shows an example of a flowchart of a control program of a microcomputer as a control unit in the dimming type LED lighting fixture of the human body switching lighting type according to the first embodiment.
First, warming (white lighting) is performed for 15 seconds (step S1).

  Next, after warming, the last stored dimming lighting is performed for a predetermined time at a preset dimming level (step S2). The function of step S2 at this time constitutes a first lighting control unit. Here, the last memory dimming lighting is 100% lighting when the power is turned on for the first time after purchasing the LED lighting apparatus (initial state), but after the power is turned on by PD touch in the process of at least one round of this control flow. When the lighting brightness of the LED group for lighting 20 is set to be dimmed and turned on (for example, when used as a night light), the memory in the microcomputer IC3 is set to the dimming setting level by an instruction based on the PD touch. For example, dimming can be performed by setting the brightness level to 25% lighting. The dimming setting means that any one of the brightness levels can be set in order from, for example, 10%, 25%, 50%, and 100% for each touch by PD touch (however, the initial setting at the time of purchase is 100%) That is).

  In this way, the process proceeds to the next step S3 in the state where the preset dimming is performed at 25% lighting, which is preset when the power is turned on. In step S3, the lighting ambient illumination changeover switch SW2 is set to appropriately switch the surrounding ambient illumination intensity (threshold) in the darkness necessary for starting the human motion operation from a plurality (two in the figure).

  When the lighting illuminance changeover switch SW2 is set to ON, the illumination LED group 20 is turned on when the ambient environment illuminance is equal to or lower than the predetermined value (30LX) of bright illuminance (step S4), and the switch SW2 is set to OFF. Can select a threshold illuminance effective in the environment where the LED lighting apparatus 100 is installed so that the LED is turned on when the ambient illuminance is equal to or less than a predetermined value (10LX) of dark illuminance (step S5).

  After one of the brightness illuminance predetermined value or less or the dark illuminance predetermined value or less is selected in step S4 or step S5, human detection is performed with the selected sensitivity (threshold value) (step S6). Switching from the state of luminance lighting (for example, 25% dimming lighting) to high luminance lighting (for example, lighting of 100% dimming) (step S7).

  The timer starts simultaneously with the execution of the 100% lighting control in step S7 (step S8). The timer time at this time can be set using, for example, a rotary switch, and for example, any one of 1, 5, 10, 20, 30, 40, 50, and 60 minutes can be selected as the timer setting time. .

  Then, in step S9, it is determined whether or not a preset timer time has been reached since the timer started at the time of human detection. In step S9, if a person is nearby in the state before the time is up, the human sensor detects the human sensor (step S11), whereby the microcomputer is retriggered and resets the timer again (step S12). The dimming 100% lighting is sustainable. The functions of steps S3 to S9, S11, and S12 at this time constitute a second lighting control unit.

  If the time is up in step S9, the LED group 20 as the illumination load is returned to lighting at a low luminance (25% dimming lighting) that is the original set dimming state (step S10). The functions of steps S9 and S10 at this time constitute a third lighting control unit.

  On the other hand, when the ambient illuminance is not less than or equal to the threshold illuminance set in advance in steps S4 and S5, the LED is turned off. When the PD touch by the user is made (step S13), the operation proceeds to step S14. In the operation in step S14, dimming switching is performed for one step according to the dimming ring from the set dimming level before the PD touch. For example, the current low-luminance lighting (25% dimming lighting) is switched to high-luminance lighting (50% dimming lighting), and lighting is performed with the switched dimming lighting (step S15). The functions of steps S13 to S15 at this time constitute a lighting state setting unit. In step S17, if the PD touch is within a predetermined time, for example, 25%, 50%, and 100% are sequentially selected in a ring manner every time the PD touch is performed, and can be lit at the selected brightness. It is.

FIG. 3 shows an example of a flowchart of the PD touch routine S15 in FIG. This flowchart is an operation related to the description of FIG.
It is determined whether or not the AD voltage difference between the current AD conversion data value and the AD conversion data value -10 / Tad before the current time (Tad: sampling period of AD conversion) is smaller than 0.5 V (step) S21). If no in step S21, the AD voltage difference is 0.5V or more and the output of the illuminance sensor IC4 has changed abruptly. Therefore, the loop for determining the PD success in steps S22 to S27 is cycled. If PD success is confirmed after returning from step S27 to step S22, it is determined that PD touch is successful (yes), the process proceeds to step S28, the PD flag is set to 1, and the process proceeds to step S29. If the AD voltage difference is smaller than 0.5 V in step S21, it is determined that the illuminance sensor output has not changed suddenly, that is, it is not a PD touch, and the process returns to the main flow in FIG.

  In step S29, the detection operation of the illuminance sensor is stopped (masking) for 1.5 seconds and the finger operation is determined by the PD touch in order to prevent an influence on the illuminance sensor due to the light condition at the external light intake port of the illuminance sensor. The AD conversion sampling values for 10 illuminance values stored in the memory for use in the process are reset. Then, the process returns to the main flow in FIG.

  On the other hand, if the PD touch is not established in step S22, the process proceeds to step S23. In step S23, it is determined whether or not the voltage of the current AD conversion value is smaller than 0.3V. 0.3V is a value corresponding to the bottom voltage of the concave curve of the sensor output value of the illuminance change characteristic at the time of PD touch shown in FIG. 11, and the PD touch is normal when the current AD conversion value is smaller than 0.3V. Therefore, the process proceeds to the next step S25 after performing the human detection by the human sensor in order to confirm whether the human being operating is detected.

  When human detection is performed in step S25, it is confirmed that the current AD conversion value is continuously larger five times than the 10th previous AD conversion value (step S28). In step S28, as can be seen from the PD touch characteristic graph of FIG. 11, the illuminance change characteristic curve (the concave curve with time on the horizontal axis and the illuminance sensor value on the vertical axis) rises with the passage of time from the bottom. Since it can be seen that the characteristic part (the part that returns to the original illuminance level) is reached, step S25 on the flow shown in FIG. 3 is repeated in the loop that passes through S27 and S22 to S24 a plurality of times. The relationship of the converted value> the previous AD converted value is confirmed five times in succession (step S28).

  If it is confirmed in step S25 that 5 consecutive times are established, it is determined that PD touch is successful (step S26), and the elapsed time t in the next PD touch processing (here, 2 seconds is set, which is the same as t in FIG. 11). (Step S27), if 2 seconds have passed, the process returns to the main flow of FIG.

Now, in the embodiment of the present invention, a human sensor for detecting whether or not there is a person in the surroundings is provided, and an illuminance sensor is provided to control the detection operation of the human sensor based on the ambient environment illuminance. Yes.
When the dimming LED lighting fixture is lit at a low illuminance and the human sensor detects a person below the illuminance value with the ambient environment illuminance, the human sensor detects the lighting load for a predetermined period after detecting the person. It is controlled so that it is lit at a high luminance (for example, 100% lit) and can be lit at the original low luminance after a predetermined time has elapsed. That is, when the power switch is turned on, the LED as the lighting load is turned on in a preset low-illumination state (for example, 25% lighting), and when the presence sensor detects that a person has come, Control is performed so that the brightness is turned on at 100% lighting and the original low-brightness lighting state is restored when a predetermined timer time elapses. This control method is called a human-sensation switching lighting type because it switches from the first lighting state (for example, 25% lighting) to the second lighting state (100% lighting) at the time of human detection. This control method can be used as illumination at night or the like, for example, a night light.

  Alternatively, as another control method, the human sensor is controlled so as to start a human detection operation for detecting a person when the ambient environment illuminance is less than a certain illuminance value. First, the LED, which is the illumination load, is left in an unlit state, and when a person comes and senses a human presence, the LED is turned on for a predetermined time with the brightness of a preset setting state, and after the predetermined time has elapsed, the LED returns to the original unlit state To control. This control method is called a human-lighting type because it is turned on and off by human feeling.

[Second Embodiment]
Since the structural example of the light control type LED lighting fixture which concerns on the 2nd Embodiment of this invention is the same as the structural example of the light control type LED lighting fixture which concerns on 1st Embodiment of FIG. 1, illustration is abbreviate | omitted. .

  The second embodiment is different from the first embodiment in that the control operation of the dimmable LED lighting apparatus of the first embodiment is a human-sensing switching lighting type, whereas the second embodiment is different from the first embodiment. The control operation of the dimmable LED lighting apparatus of the embodiment is a human-lighting type. Accordingly, the second embodiment and the first embodiment differ from each other in the control program of the microcomputer that is the control unit.

  When the human sensor PED detects a person with an ambient illuminance value below an illuminance value with the illumination LED group 20 turned off, the control unit 30 illuminates the LED group 20 for a predetermined period after detecting the person. The lighting control unit that controls to turn on at a high constant luminance and to turn off the original after a predetermined time, and the output IC 4 of the illuminance sensor are monitored, and the LED group for illumination is captured by capturing the sudden change in the output. And a lighting state setting unit that generates a command for changing the high constant luminance.

A control operation of the control unit 30 will be described.
When the switch SW1 connected to the microcomputer IC3 in the control unit 30 is turned on, the LED group 20 is always extinguished, a person is detected by the human sensor circuit 41, and the switch SW2 of the control unit 30 is selected in advance. If it is below lighting illumination intensity, the LED group 20 will light. At this time, the LED group 20 is turned on at a duty ratio of a PWM pulse selected in advance, that is, dimmed. If you want to change the brightness, you can easily change the dimming degree (brightness level) sequentially in a ring manner by instructing with PD touch. At this time, the changed PWM pulse duty ratio is reproduced from the next time.

  The LED group 20 is turned on for the timer time selected by the switch SW3, and is turned off after the time is up.

FIG. 4 shows an example of a flowchart of a control program of a microcomputer as a control unit in the human-lighting dimmable LED lighting apparatus of the second embodiment.
First, in step S41, warming (white lighting) is performed in which all lighting is performed for 15 seconds and then all lighting is turned off.
When the switch SW2 is turned on by the lighting illuminance changeover switch SW2, the LED group 20 is lit when the ambient environment illuminance is equal to or less than a predetermined value (for example, 30LX) (step S43), and the switch SW2 is turned off. In such a case, the lighting time effective in the environment where the dimmable LED lighting device 100 is installed is set so that the LED group 20 is turned on when the ambient environment illuminance is equal to or less than a predetermined value (eg, 10LX) of dark illuminance (step S44). A threshold is selected (step S42). The functions of steps S41 to S44 at this time constitute a fourth lighting control unit (the first lighting control unit in claim 2).

  After one of 30 LX or less or 10 LX or less is selected in step S43 or step S44, human detection is executed with the selected sensitivity (threshold) (step S45), and the setting adjustment in a preset state is performed. The light is turned on (step S46). The set dimming can be set to any brightness level from, for example, 10%, 25%, 50%, and 100% by PD touch (however, the initial setting is 100%).

  The timer starts with the start of the set dimming lighting in step S46 (step S47). The timer time can be set using, for example, a rotary switch. For example, 1.5, 10, 20, 30, 40, 50, 60 minutes can be selected as the timer setting time.

  In step S48, it is determined whether or not the timer time set after the human timer in the microcomputer starts (step S47) has been reached. In step S48, if a human presence is detected before the time is up (step S50), the microcomputer is retriggered, the timer is reset at that timing (step S51), and the set dimming light is turned on. It can be continued. The functions of steps S40 to S48, S50 and S51 at this time constitute a fifth lighting control unit (second lighting control unit in claim 2).

  If the time is up in step S48, the LED group 20 as the illumination load is turned off (step S49). The functions of steps S48 and S49 at this time constitute a sixth lighting control unit (third lighting control unit in claim 2).

  Then, when the user performs PD touch (step S52), for example, 25%, 50%, and 100% dimming level settings are sequentially selected for each PD touch 40 in a ring manner (step S53). The dimming lighting is continued with the brightness (step S54). The functions of steps S52 to S54 at this time constitute a lighting state setting unit.

FIG. 5 shows an example of a flowchart of the PD touch routine S52 in FIG. The flowchart in FIG. 5 is the same as the PD touch routine S13 in FIG. 3, so the reference numerals of the steps in FIG. 5 are the same as the reference numerals of the steps in FIG.
[Third embodiment]
Since the structural example of the light control type | mold LED lighting fixture which concerns on the 3rd Embodiment of this invention is the same as the structural example of embodiment of FIG.1 and FIG.4, illustration is abbreviate | omitted.

  The third embodiment is different from the first and second embodiments in that the dimming level of the LED group 20 is switched, and a sudden change in brightness when the LED group 20 is turned on and off is gradually changed. It is the point which performs such control.

A control operation of the control unit 30 will be described.
The microcomputer IC3 in the control unit 30 controls the duty ratio of the on / off pulse width of the PWM pulse when the LED group 20 is lit. At first, turn on the lamp with a duty ratio of about 5% and turn on the lamp with a so-called fade-in lighting method that increases the duty ratio to the set duty ratio. It turns off with a fade-out method that reduces.

  LED setting dimming lighting based on human detection is lit in a dark state to some extent, so fading in to gradually reach the set brightness to prevent dazzling when suddenly lighting It is preferable. This fade-in is possible by gradually increasing the duty ratio of known pulse width modulation (PWM). Regarding the LED turning-off operation, it is preferable to perform a fade-out that gradually turns off using the same technique as the above-described fade-in.

  In the case of the human switching lighting type, the control unit 30 controls the duty ratio of the on / off pulse width of the PWM pulse when the illumination LED group 20 switches to high illuminance, and is initially low based on the command. Turns on from the duty ratio, fades in to increase the duty ratio to the set duty ratio, and fades out to reduce the fade ratio gradually from the set duty ratio when switching to low illuminance. The LED group 20 for illumination is controlled.

  In the case of the human lighting type, the control unit 30 controls the duty ratio of the on / off pulse width of the PWM pulse when the lighting LED group 20 is lit. The LED group for lighting is turned on and faded in to increase the duty ratio up to the set duty ratio, and when switching to off, the fade-out is turned off to gradually decrease the duty ratio from the set duty ratio. 20 is controlled.

[Fourth Embodiment]
Since the structural example of the light control type | mold LED lighting fixture which concerns on the 4th Embodiment of this invention is the same as that of embodiment of FIG.1 and FIG.4 except the switch structure shown in FIG. 12, illustration is abbreviate | omitted.
The fourth embodiment is different from the first to third embodiments in that it is used for illumination based on pressing of a mechanical switch such as a push switch instead of PD touch that closes the external light intake port of the illuminance sensor with a finger. The point is to perform control to generate a command for changing the lighting setting luminance of the LED group.

  Specifically, as shown in FIG. 12, a mechanical switch SW4 is arranged around the microcomputer IC3 of the control unit 30. That is, the resistor R20 and the mechanical switch SW4 are connected in series between the DC power supply terminal V5 and the reference potential point (earth) GND, and the voltage at the connection point of the resistor R20 and the mechanical switch SW4 is input to the microcomputer IC3. In this case, by turning on or off the mechanical switch SW4, a low-level or high-level control signal is output as a command from the connection point between the resistor R20 and the mechanical switch SW4.

A control operation of the control unit 30 will be described.
In the case of the presence switching lighting type, the control unit 30 detects that the presence sensor PED detects a person with an ambient illuminance below a certain illuminance value in a state where the lighting LED group 20 is lit at a low predetermined luminance. The lighting LED group 20 is lit at a high predetermined luminance for a predetermined period after the person is detected, and is controlled to be lit at the original low predetermined luminance after a predetermined time has elapsed, and illumination is performed based on the operation of a mechanical switch. A control operation for generating a command for changing the low predetermined luminance of the LED group 20 is performed.

  Further, in the case of a human-lighting type, the control unit 30 detects a person when the human-sensing sensor PED detects a person with an ambient illuminance value equal to or less than an illuminance value in a state where the lighting LED group 20 is turned off. The lighting LED group 20 is turned on at a high predetermined luminance for a predetermined period after the detection, and is controlled to be in the original off state after a predetermined time has passed, and the lighting LED group 20 is controlled based on the operation of the mechanical switch. A control operation for generating a command for changing the high predetermined luminance is performed.

  In this way, by operating a mechanical switch provided separately from the illuminance sensor, it is possible to easily generate a command for changing the lighting setting brightness of the LED group without being affected by ambient light. is there.

  According to the embodiments of the present invention described above, an external infrared remote controller or the like is not used, no special parts are added, and no electrical wiring is required for light use. A desired command can be transmitted to the LED luminaire simply by touching the daylighting unit of the ambient environment illuminance sensor built in the luminaire with a finger for a certain period of time. There are no parts that use electricity on the outer surface (wall surface, etc.) of the illuminance sensor lighting part, and switching operation is performed using illuminance change based on light-shielding operation, so even a hand wet with water (PD touch) ) Has the advantage of being safe. In addition, if the configuration illuminance change instruction is performed using a mechanical switch instead of PD touch, the advantage of PD touch for the illuminance sensor is eliminated, but control is performed because it is less affected by ambient light. There is an advantage that the microcomputer program can be simplified. The dimming lighting of the LED can be controlled by a human-sensing switching lighting method or a human-lighting lighting method using an existing human sensor and an illuminance sensor built in the lighting fixture, thereby reducing power consumption and parts cost. Is possible.

DESCRIPTION OF SYMBOLS 10 ... Power supply part, 20 ... LED group for illumination, 30 ... Control part, 40 ... Sensor part, IC3 ... Microcomputer, IC4 ... Illuminance sensor, PED ... Human sensor, 100 ... Dimmable LED lighting fixture.

Claims (6)

An LED luminaire that includes an illumination LED group including at least one LED, and that controls illumination light of the illumination LED group using an illuminance sensor that detects illuminance of the surrounding environment and a human sensor that detects a person Because
A first lighting control unit that lights the LED group for illumination at a predetermined low luminance, and the human sensor is in a state of being lit at the predetermined low luminance, and the human sensor is less than an illuminance value at which ambient illuminance is present When a person is detected, a second lighting control unit that turns on the lighting LED group with a predetermined high brightness for a predetermined period after detecting the person, and the lighting LED group after the predetermined period has passed. A lighting control unit comprising a third lighting control unit for lighting at the predetermined low luminance;
A lighting state setting unit that generates a command for changing the predetermined low luminance based on a user operation;
A dimmable LED lighting apparatus comprising: An LED luminaire that includes an illumination LED group including at least one LED, and that controls illumination light of the illumination LED group using an illuminance sensor that detects illuminance of the surrounding environment and a human sensor that detects a person Because
When the human sensor does not detect a person, a first lighting control unit that turns off the lighting LED group, and the human sensor is in an ambient environment with the lighting LED group turned off. When a person is detected with an illuminance below a certain illuminance value, a second lighting control unit that turns on the lighting LED group with a predetermined high brightness for a predetermined period after detecting the person and the predetermined period have elapsed A lighting control unit comprising a third lighting control unit that returns the illumination LED group to the original extinguishing state later;
A lighting state setting unit that generates a command for changing the predetermined high luminance based on a user operation;
A dimmable LED lighting apparatus comprising:   2. The lighting state setting unit monitors an output of the illuminance sensor, and generates a command for changing the predetermined low luminance in response to a sudden change in the output of the illuminance sensor. The toning type LED lighting apparatus according to 1.   The lighting state setting unit monitors the output of the illuminance sensor, and generates a command for changing the predetermined high luminance by capturing a sudden change in the output of the illuminance sensor. The toning type LED lighting apparatus according to 1.   The toning type LED lighting device according to claim 1, wherein the lighting state setting unit generates a command for changing the predetermined low luminance based on an operation of a mechanical switch.   The toning type LED lighting device according to claim 2, wherein the lighting state setting unit generates a command for changing the predetermined high luminance based on an operation of a mechanical switch.

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