JP5614995B2 - Task light fixture - Google Patents

Description

  The present invention relates to a task lighting apparatus, and in particular, a task that detects the presence of a resident and automatically turns off when no occupant is present within a predetermined range to suppress energy loss. The present invention relates to a lighting apparatus.

  2. Description of the Related Art Conventionally, there has been known a luminaire that includes a human body detection unit, and automatically turns on a light emitting unit when the human body detection unit detects a person and automatically turns off when no person is detected. Such a lighting fixture includes a light emitting unit, a distance measuring sensor, and a pyroelectric sensor. The distance measuring sensor is activated or stopped according to the detection result of the pyroelectric sensor, and the light emitting unit is turned on by the detection result of the distance measuring sensor. Or the illuminating device made to turn off and the lighting fixture provided with the same are proposed (for example, refer patent document 1).

  However, according to the lighting apparatus described in Patent Document 1, a distance measuring sensor with large power consumption is activated each time a person passes in the vicinity of the pyroelectric sensor, and there is a possibility that useless energy is consumed. There was room for improvement in order to achieve further energy saving.

JP 2002-50489 A

  The present invention has been made in view of the above circumstances, and when the occupant leaves the seat, the light is automatically turned off and the operation is stopped, and the lighting device is turned off until it indicates the intention to use the lighting device again. An object of the present invention is to provide a task lighting device that can prevent energy loss by operating a sensor unit and a light emitting unit only while a user is present.

The present invention is for a task having a light emitting unit, a sensor unit that measures a distance to a seated person, and a determination unit that determines the presence or absence of the seated person based on distance information obtained by the sensor unit. It is a lighting fixture, and includes a control unit that controls turning on and off of the light emitting unit, and by manual operation, the light emitting unit starts operating, and the sensor unit measures an initial distance to a seated person, The determination unit determines that the presence person is present when a change amount of the current distance to the occupant and the initial distance measured by the sensor unit is less than a preset threshold, and the change amount is When it is equal to or greater than the threshold value, it is determined that there is no occupant, and when the determination unit determines that there is no occupant, the light emitting unit is turned off and the operation is stopped.

With this configuration, since the operation of the sensor unit and the light emitting unit stops after the light emitting unit is turned off until the occupant (user) manually operates and turns on the lighting fixture, power may be consumed. And wasteful energy consumption can be prevented. In addition, by setting the normal movement distance range of the occupant as a threshold value, even if the occupant moves a little, the light emitting unit is prevented from turning off automatically against the will of the occupant, Usability of lighting fixtures for use is improved.

  Furthermore, the present invention includes the above-described task lighting device, wherein the threshold for determining the presence or absence of the occupant can be arbitrarily set.

  With this configuration, the occupant can adjust the permissible distance range from the sensor unit, where the determination unit determines presence / absence, to the occupant, and task lighting that matches the occupant's behavior pattern The instrument can be controlled.

  Further, the present invention includes the above-described task lighting device, wherein the sensor unit can be installed at an arbitrary position.

  With this configuration, the sensor unit can be installed at an optimum position according to the behavior pattern of the occupant, and the lighting and extinguishing of the task lighting fixture can be controlled effectively.

  Furthermore, the present invention includes the above-described task lighting device, wherein the control unit turns off the light emitting unit after a predetermined time has elapsed since the determination unit determined that there was no occupant.

  With this configuration, at night or the like, safety is ensured without being in a dark state immediately after leaving the seat.

  Further, the present invention includes the above-described task lighting device, wherein the predetermined time can be set to an arbitrary time.

  With this configuration, the light emitting unit can be turned off according to the behavior pattern of the occupant.

  According to the present invention, the operation of the lighting fixture is stopped until the user manually operates to turn on the lighting fixture. After the lighting, when the occupant leaves the seat, the light emitting unit is turned off and the lighting fixture is turned off. Therefore, it is possible to provide a task lighting apparatus that can prevent wasteful energy consumption.

The side view which shows the state by which the lighting fixture for tasks which concerns on embodiment of this invention was installed on the desk A view in FIG. The block diagram which shows schematic structure of the lighting fixture for tasks which concerns on embodiment of this invention The flowchart for demonstrating the control procedure of the task lighting fixture which concerns on embodiment of this invention It is a time chart of the task lighting fixture, (A) is a time chart of the task lighting fixture which concerns on embodiment of this invention, (B) is a time chart of the conventional lighting fixture.

  Hereinafter, a task lighting apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a state in which a task lighting apparatus according to an embodiment of the present invention is installed on a desk, and FIG. 2 is a view as seen from an arrow A in FIG. As shown in FIGS. 1 and 2, the task lighting fixture of the present embodiment is a stand-type lighting fixture 10, which is used by being placed on a desk 21 on which a personal computer 20 is placed, for example. The stand-type lighting fixture 10 is configured such that a light emitting unit 13 such as a straight tube fluorescent lamp is supported above a display device 22 of a personal computer 20 by a support column 12 erected from a base 11. ) Illuminate 24 hands.

  As shown in FIG. 3, the base 11 houses a determination unit 14 and a control unit 15 that are configured by, for example, a microcomputer (not shown). The microcomputer is electrically connected to a power switch 16, which is a manual operation unit disposed on the support column 12, and a sensor unit 17 provided as a separate member is connected to a signal line 18.

  The sensor unit 17 can be installed at an arbitrary position within the range allowed by the length of the signal line 18. In the embodiment shown in FIG. 1, it is arranged at the lower part of the front surface of the display device 22 located in front of the user (occupant) 24 sitting on the chair 23, and irradiates the occupant 24 with the detection light L. ing.

  The sensor unit 17 is a distance measuring sensor that measures the distance to the occupant 24. For example, the light of an infrared light emitting diode (LED) is projected through the light emitting side lens, and the reflected light is positioned through the light receiving side lens. Light is received at one point on a light receiving element such as a detection element PSD (Position Sensitive Detector). Since the incident position of light on this light receiving element changes according to the distance to the reflector, this incident position is detected and the distance to the reflector is detected by applying the principle of triangulation Is done.

  The determination unit 14 determines the presence / absence of the occupant 24 based on the distance information to the occupant 24 measured by the sensor unit 17 and transmits the result to the control unit 15. Based on the determination result of the determination unit 14, the control unit 15 maintains the lighting state of the light emitting unit 13 or turns off the light emitting unit 13 and stops all operations. The procedure for determining the presence / absence of the occupant 24 by the determination unit 14 will be described in detail later.

  Next, a case where the task lighting device (stand-type lighting device) 10 according to the embodiment of the present invention configured as described above is used on a desk 21 on which the personal computer 20 is placed is used as an example. I will explain.

  Here, a description will be given assuming that a threshold value that is an allowable value of the distance change amount to the occupant 24, which is a reference for determining the presence or absence of the occupant 24, is set in advance. The threshold value can be set in order to prevent the light emitting unit 13 from being turned off by a slight movement of the occupant 24 and improve the usability of the stand-type lighting fixture 10, and can be set to any value. By doing so, it is possible to use it according to the behavior pattern of the seated person 24.

  As shown in FIG. 4, the stand-type lighting fixture 10 of the present embodiment turns on the stand-type lighting fixture 10, so that the user (occupant) 24 manually operates the power switch 16 to turn it on (steps). S101), the sensor unit 17 is activated to measure the distance to the seated person 24, and this measured distance is stored in the storage unit of the determination unit 14 as the initial distance N0 (step S102).

  Next, after the light emitting unit 13 is turned on (step S103), the distance to the seated person 24 is again measured by the sensor unit 17 to obtain the current distance N1 (step S104). Then, the distance change amount (current distance N1−initial distance N0) between the initial position and the current position of the occupant 24 is obtained, and when the distance change amount is less than the set threshold, the determination unit 14 determines the occupant. 24 is determined and transmitted to the control unit 15 (step S105), the process returns to step S103 and the lighting of the light emitting unit 13 is continued.

  On the other hand, when the distance change amount is equal to or greater than the threshold, the determination unit 14 determines that there is no occupant 24 (has left) and transmits it to the control unit 15 (step S105). Based on the determination by the determination unit 14 that there is no occupant 24, the control unit 15 turns off the light emitting unit 13 after a predetermined time t has elapsed (step S106), and stops all operations. (Step S107).

  Next, the lighting pattern of the stand type lighting fixture 10 of this embodiment controlled in this way is demonstrated compared with the conventional lighting fixture. FIG. 5 is a time chart of a task lighting fixture, (A) is a time chart of the task lighting fixture according to the embodiment of the present invention, and (B) is a time chart of a conventional lighting fixture. 5, lines a1 and b1 indicate output signals of the sensor unit, lines a2 and b2 indicate lighting states of the light emitting unit, and lines a3 and b3 indicate power consumption states.

  First, the task lighting fixture of this embodiment is demonstrated based on FIG. 5 (A). As shown in FIG. 5A, since the sensor unit 17 is not activated in the initial state, even if the user 24 is seated on the chair 23 (P1), the light emitting unit 13 is not turned on, and the user 24 When the power switch 16 is manually operated, the sensor unit 17 starts operating to detect the user 24 (diagram a1), and the light emitting unit 13 is lit (diagram a2) (P2).

  When the occupant 24 leaves and moves to a position exceeding the set threshold value, the output signal of the sensor unit 17 is turned off (P3), and thereby the determination unit 14 determines that there is no occupant 24. After the predetermined time t has elapsed, the control unit 15 turns off the light emitting unit 13 and stops all operations (P4).

  In this way, since the lighting state is maintained for a predetermined time t without turning off immediately after leaving the seat, it is prevented from becoming dark immediately after leaving the seat at night or the like, thereby ensuring safety. If there is no need to ensure such safety, the predetermined time t may not be provided (t = 0), and the light may be turned off simultaneously with the output signal off of the sensor unit 17.

  Since the operation of the sensor unit 17 is stopped simultaneously with the extinction of the light emitting unit 13, the detection of the user 24 by the sensor unit 17 is not performed thereafter, and even if a person passes near the task lighting fixture 10 (P5, P6), the light emitting unit 13 is kept off. That is, as shown in the diagram a3, the power consumed for operating the sensor unit 17 and the light emitting unit 13 after manually operating the power switch 16 is zero after the light emitting unit 13 is turned off (P4). Become.

  Then, when the user 24 manually operates the power switch 16 again (P8), the sensor unit 17 starts to operate to detect the user 24 and the light emitting unit 13 is turned on as before. After the occupant 24 leaves and the output signal of the sensor unit 17 is turned off (P9), the light emitting unit 13 is turned off and all the operations are stopped when a predetermined time t has elapsed (P10). ).

  On the other hand, as shown in FIG. 5B, in the conventional lighting fixture, when the user 24 is seated on the chair 23, the sensor unit detects the user 24 and outputs a detection signal, and the light emitting unit 13 is turned on. (P1). When the occupant 24 leaves and the detection signal is turned off, the light emitting unit 13 is immediately turned off (P3). Since the sensor unit is operating even after the light-emitting unit 13 is turned off, the light-emitting unit 13 is lit while the sensor unit detects a passer-by every time a person passes near the lighting fixture (P5, P6).

  When the user 24 is seated again (P7), the sensor unit detects the user 24, and at the same time, the light-emitting unit 13 is turned on and remains on until the user leaves (P9).

  As shown in the diagram b3, the power consumption of the conventional lighting apparatus is always consumed for operating the sensor unit, and illumination power is added when the light emitting unit is turned on. In addition, when a passerby who does not need to turn on the light passes, the light emitting unit is turned on and the illumination power is consumed.

  On the other hand, the task lighting fixture 10 of the present embodiment consumes power for the sensor unit 17 and the light emitting unit 13 only during the period when the light emitting unit 13 is lit. After is turned off, the power consumption becomes zero. This prevents unnecessary energy consumption due to automatic lighting when sitting (P1 to P2, P7 to P8), forgetting to turn off when leaving the seat (P4 to P5), and lighting due to passerby detection (P5 to P7). Therefore, it is possible to provide an energy saving task lighting device.

  As described above, according to the task lighting apparatus according to the embodiment of the present invention, when the occupant manually operates the sensor unit, the sensor unit starts to operate and the light emitting unit is turned on. When the determination unit determines that there is no occupant based on the distance information from the, the light emitting unit is automatically turned off and all operations are stopped. As a result, the sensor unit and the light emitting unit do not operate until the user manually operates to turn on the luminaire, and further, since the occupant does not remain lit after leaving the seat, Unnecessary energy consumption due to forgetting to turn off the lighting fixture before starting to use and when leaving the seat can be prevented.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, in the above description, the task lighting fixture has been described as a stand-type lighting fixture, but is not limited thereto, and can be applied to a lighting fixture of an arbitrary form and has the same effect.

10 Stand type lighting fixtures (task lighting fixtures)
13 Light Emitting Unit 14 Judgment Unit 15 Control Unit 16 Power Switch (Manual Operation Unit)
17 Sensor 24 User (Attendance)
t Predetermined time

Claims (5)

A light emitting unit and a sensor unit for measuring the distance to the occupant;
A determination unit that determines the presence or absence of the occupant based on distance information obtained by the sensor unit;
A task lighting fixture comprising:
A control unit for controlling turning on and off of the light emitting unit;
By manual operation, the light emitting unit starts operation, the sensor unit measures the initial distance to the occupant,
The determination unit determines that the presence person is present when a change amount of the current distance to the occupant and the initial distance measured by the sensor unit is less than a preset threshold, and the change amount is When it is equal to or greater than the threshold, it is determined that there is no attendee,
The control unit is a task lighting device that turns off the light emitting unit and stops operation when the determination unit determines that there is no occupant. The task lighting device according to claim 1 ,
The task lighting apparatus in which the threshold value for determining the presence or absence of the occupant can be arbitrarily set. The task lighting device according to claim 1,
The sensor unit is a task lighting device that can be installed at an arbitrary position. The task lighting device according to claim 1,
The control unit is a task lighting device that turns off the light emitting unit after a predetermined time has elapsed from when the determination unit determines that there is no occupant. The task lighting device according to claim 4 ,
The task lighting apparatus, wherein the predetermined time can be set to an arbitrary time.

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