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Lighting device and lighting system

A technology for lighting equipment and appliances, which is applied in lighting devices, fixed lighting devices, lighting and heating equipment, etc., can solve problems such as wasting electricity, and achieve the effect of promoting energy saving and improving brightness.

Active Publication Date: 2011-08-24
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above-mentioned control is performed on the lighting fixture described in Patent Document 2, even if there is no one in the lighting space, the light reflected by the reflection member is irradiated to the ceiling surface, and the power equivalent to the reflected light is wasted.

Method used

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  • Lighting device and lighting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] Embodiment 1 of the lighting fixture of the present invention will be described in detail with reference to the drawings.

[0027] like figure 1 As shown in (a), the lighting fixture of this embodiment includes: two kinds of light sources 1A, 1B; a lighting circuit part 2 for independently turning on and off (or dimming) each light source 1A, 1B; A control unit 3 for controlling; a human body induction sensor 4 . The lighting fixture also has a fixture main body 10, and the fixture main body 10 is as figure 1 As shown in (b), the light sources 1A, 1B, the lighting circuit unit 2, the control unit 3, and the human body sensor 4 are held, and installed on the ceiling S of the lighting space.

[0028] The light sources 1A and 1B are configured by mounting a light-emitting diode 12 for emitting white light on a heat-dissipating mounting substrate 11 . One type of light source 1A is arranged at the center of the device main body 10 and radiates light toward the floor F of...

Embodiment approach 2

[0036] like figure 2 As shown, the lighting fixture of this embodiment is characterized by having a brightness sensor 5 instead of the human body sensor 4 . Among them, the configuration is the same as that of the first embodiment except that a brightness sensor 5 is provided instead of the human body sensor 4 . Therefore, the same reference numerals are assigned to the same constituent elements as those in the first embodiment, and description thereof will be omitted.

[0037] The brightness sensor 5 has a photosensitive element such as a photodiode, a comparator (Comparator) for comparing the output of the photosensitive element with a threshold value, etc., and when the surrounding brightness (illuminance) exceeds a predetermined value, a high-level signal (outdoor Light detection signal) is output to the control unit 3.

[0038] Here, if figure 2 As shown in (b), a window WD is opened on the wall surface of the lighting space, and outdoor light (sunlight) enters throu...

Embodiment approach 3

[0043] like image 3 As shown, the lighting fixture of this embodiment is characterized by including a human body sensor 4 and a brightness sensor 5 . Here, the basic structure of this embodiment is the same as that of Embodiment 1 and Embodiment 2, and therefore, the same reference numerals are assigned to the same constituent elements, and description thereof will be omitted.

[0044] The control operation of the control unit 3 in this embodiment will be described. When the control unit 3 outputs the human body detection signal from the human body induction sensor 4, or when the outdoor light detection signal is output from the brightness sensor 5, the switch of the lighting circuit unit 2 is turned on, so that both of the two light sources 1A and 1B are turned on. . Therefore, the light irradiated from one light source 1A to the floor F can provide sufficient illuminance required for the work surface, and the light irradiated from the other light source 1B to the ceiling ...

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Abstract

A lighting device in the invention is advantaged by improving brightness while promoting energy conservation. When a control part (3) outputs human detection signals from a human sensing sensor (4), a switch lightening a circuit part (2) is turned on and two parties of two light sources (1A, 1B) are lightened. Therefore, light illuminating from the light source (1B) to a ceiling surface (S) is sued to improve brightness of lighting space (brightness refers to a target value). On the other hand, when the control part (3) does not output the human detection signals from the human sensing sensor(4), one party of the switch lightening the circuit part (2) is kept to be on to make the light source (1A) be lightened, and make the other party of the switch be off to make the light source (1B) be extinguished. Therefore, energy conservation can be promoted via making the light source (1B) be extinguished under the condition that no people exist in the lighting space.

Description

technical field [0001] The present invention relates to a lighting fixture and a lighting system. Background technique [0002] Usually, a space where many people work, such as an office or a classroom, is illuminated by illumination light irradiated on the ground from a plurality of lighting fixtures installed on the ceiling. That is, the entire lighting space is illuminated by a plurality of lighting fixtures installed on the ceiling (referred to as basic lighting), and partial lighting is performed by desktop lighting fixtures placed on each worker's workbench (desk) as needed. [0003] However, in the conventional basic lighting, attention is paid to the illuminance of the ground or the work surface (table top surface of the workbench, etc.), and it is desired to control the illuminance within a predetermined range. However, there is a gap between a person's perception of the brightness of the lighting space when looking around the entire lighting space and an ideal ill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/04F21V23/00H05B37/02F21Y101/02
CPCY02B20/44Y02B20/40
Inventor 谷川哲也
Owner PANASONIC CORP
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