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Lighting device

A lighting device and illuminance technology, applied in lighting devices, independent lighting devices, lighting and heating equipment, etc., can solve problems such as difficult visual work, energy waste, eye fatigue, etc., to suppress glare, reduce illuminance, and achieve energy saving the effect of

Inactive Publication Date: 2014-11-19
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the illuminance is increased, the irradiated light becomes dazzling, so it is easy to feel eye fatigue, and it is difficult to perform long-term visual work
And, when the illuminance is increased excessively, it leads to waste of energy

Method used

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Embodiment Construction

[0029] refer to Figure 1 to Figure 8 A lighting device according to an embodiment of the present invention will be described. Such as figure 1 As shown, the lighting device 1 is used as a desk lamp, for example, and has a long lamp 11 , an arm 12 that holds the lamp 11 to move freely, and a base 13 that pivotally supports the arm 12 and places it on a table.

[0030] The lamp 11 has a first light source unit 2 that emits light of a predetermined color temperature, and a second light source unit 3 that emits light of a color temperature different from that of the first light source unit 2 (see also figure 2 ). Both the first light source unit 2 and the second light source unit 3 are composed of LEDs, and in the illustration, among the total of 12 LEDs arranged in a row, the LEDs arranged at the fourth and ninth positions from one end (shown by dots) is the second light source unit 3 , and the other LEDs are the first light source unit 2 .

[0031] In addition, the lamp 11...

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Abstract

The invention provides a lighting device which can adjust the illumination and color temperature of irradiation light. The lighting device can prevent eyes from getting fatigue easily even if the illumination is increased to improve the readability of characters, thereby allowing long-time visual tasks and saving energy. The lighting device comprises a first light source unit emitting light with a specified color temperature, a second light source unit emitting light with a color temperature different from that of the first light source unit, and a control unit for controlling light adjustment for the light source units separately. The control unit adjusts an output ratio of the light source units to make the illumination and color temperature of the irradiation light to change in an inverse correlation manner. The color temperature drops if the illumination rises, so that the glare of the irradiation light is inhibited even if the illumination is increased to improve the readability of characters, and eyes are prevented from getting fatigue easily, thereby allowing long-time visual tasks. Besides, the color temperature rises when the illumination decreases, so that the illumination decreases while the readability of characters is maintained, thereby saving energy.

Description

technical field [0001] The present invention relates to a lighting device capable of adjusting the illuminance and color temperature of irradiated light. Background technique [0002] Conventionally, there is known a lighting device that includes not only a fluorescent lamp but also an LED capable of high-intensity light emission with low power as a light source, and is used as a reading light on a desk or the like (for example, refer to Patent Document 1). In the lighting device described in this patent document 1, the LED is arranged in the center of the lamp, and the ring-shaped fluorescent lamp is arranged so as to surround the LED. When the LED is turned on, irradiation light such as a point light source is obtained, and when the fluorescent lamp is turned on, irradiation light that irradiates the entire upper part of the table is obtained. By individually controlling the lighting of the LED and the fluorescent lamp in this way, it is possible to adjust the light distr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02F21S6/00F21Y101/02H05B44/00
CPCY02B20/40
Inventor 松林容子
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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