JP2014078374A5

JP2014078374A5 -

Info

Publication number: JP2014078374A5
Application number: JP2012224970A
Authority: JP
Filing date: 2012-10-10
Publication date: 2015-12-03

Description

上記の目的を達成するために、本発明に係る照明機器は、白色光源と、前記白色光源の駆動制御を行う制御回路と、を有し、前記白色光源は、第１色温度の白色光を発する第１発光素子と、前記第１色温度よりも高い第２色温度の白色光を発する第２発光素子と、を含み、前記制御回路は、前記白色光源の照度を最小照度から最大照度まで変化させる際、それぞれの色温度変化率が異なる第１照度領域と第２照度領域を持つように、単一の調光信号に応じて前記第１発光素子の照度と前記第２発光素子の照度を各々独立に制御するものであって、前記第１照度領域の色温度変化率は、前記第２照度領域の色温度変化率よりも小さく、かつ、前記第１照度領域と前記第２照度領域との変化点は、前記最大照度の１／３前後である構成（第１の構成）とされている。
In order to achieve the above object, an illumination apparatus according to the present invention includes a white light source and a control circuit that controls driving of the white light source, and the white light source emits white light having a first color temperature. A first light emitting element that emits light, and a second light emitting element that emits white light having a second color temperature higher than the first color temperature, and the control circuit changes the illuminance of the white light source from a minimum illuminance to a maximum illuminance. When changing, the illuminance of the first light-emitting element and the illuminance of the second light-emitting element according to a single dimming signal so as to have a first illuminance area and a second illuminance area that have different color temperature change rates. The color temperature change rate of the first illuminance area is smaller than the color temperature change rate of the second illuminance area, and the first illuminance area and the second illuminance area are controlled independently of each other. change point between a 1/3 before and after the maximum illumination configuration (first configuration ) To have been.

また、第３の構成から成る照明機器において、前記閾値は前記調光信号の入力デューティ５０％に相当し、前記第２最大照度は前記第１最大照度のほぼ２倍に相当する構成（第４の構成）にするとよい。
Further, in the lighting device having the third configuration, the threshold corresponds to an input duty of 50% of the dimming signal , and the second maximum illuminance corresponds to approximately twice the first maximum illuminance (fourth). (Configuration).

また、第４の構成から成る照明機器において、前記制御回路は、前記白色光源の照度を前記最小照度から前記最大照度まで変化させるときに、色温度を２７００〜４３００Ｋの範囲で連動して変化させる構成（第５の構成）にするとよい。 Further, in the lighting device having the fourth configuration, the control circuit changes the color temperature in a range of 2700 to 4300K in association with changing the illuminance of the white light source from the minimum illuminance to the maximum illuminance . A configuration (fifth configuration) is preferable.

Claims

A white light source,
A control circuit for controlling the driving of the white light source;
Have
The white light source includes: a first light emitting element that emits white light having a first color temperature; and a second light emitting element that emits white light having a second color temperature higher than the first color temperature.
When the illuminance of the white light source is changed from the minimum illuminance to the maximum illuminance , the control circuit generates a single dimming signal so that each color temperature change rate has a first illuminance area and a second illuminance area. In response, the illuminance of the first light emitting element and the illuminance of the second light emitting element are independently controlled,
The color temperature change rate of the first illuminance area is smaller than the color temperature change rate of the second illuminance area, and the change point between the first illuminance area and the second illuminance area is 1 of the maximum illuminance. Lighting equipment characterized by being around / 3 .

When the dimming signal is smaller than a threshold value, the control circuit changes the illuminance of the first light emitting element from the first minimum illuminance to the first maximum in accordance with the dimming signal while the second light emitting element is turned off. While changing to illuminance, when the dimming signal is larger than the threshold value, the illuminance of the second light emitting element is changed according to the dimming signal while the first light emitting element is lit at the first maximum illuminance. The lighting device according to claim 1, wherein the lighting device is changed from the second minimum illuminance to the second maximum illuminance.

The lighting apparatus according to claim 2, wherein the first color temperature corresponds to a light bulb color, and the second color temperature corresponds to daylight white.

The lighting device according to claim 3, wherein the threshold corresponds to an input duty of 50% of the dimming signal , and the second maximum illuminance corresponds to approximately twice the first maximum illuminance.

5. The illumination according to claim 4, wherein the control circuit changes the color temperature in a range of 2700 to 4300 K when the illuminance of the white light source is changed from the minimum illuminance to the maximum illuminance. machine.

The control circuit includes a first power supply module that controls the illuminance of the first light emitting element according to the dimming signal, and a second power supply module that controls the illuminance of the second light emitting element according to the dimming signal. The lighting apparatus according to any one of claims 1 to 5, wherein:

The first power supply module and the second power supply module are respectively
An output current generation circuit for generating an output current to the light emitting element corresponding to each;
A microcomputer for controlling the output current generation circuit according to the dimming signal;
The lighting device according to claim 6, comprising:

The output current generation circuit is configured to turn on / off the output current according to an instruction from the microcomputer, and when the output current is turned on, the current value of the output current can be changed according to the instruction from the microcomputer. 8. The lighting device according to claim 7, wherein the output current is set to 0 by completely stopping the operation of generating the output current when the control is turned off.

The white light source includes a plurality of the first light emitting elements and the second light emitting elements,
The lighting device according to claim 1, wherein the first light emitting elements and the second light emitting elements are arranged alternately or in a staggered manner.

The lighting device according to claim 1, wherein the dimming signal is input by a PWM dimming method, a linear dimming method, or a triac dimming method.

The lighting device according to any one of claims 1 to 10, wherein each of the first light emitting element and the second light emitting element is an LED element.

The lighting device according to claim 11, wherein the lighting device is provided as a light bulb-shaped LED lamp, a ring-shaped LED lamp, a straight tube LED lamp, an LED ceiling light, or an LED downlight.