JP2017010745A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device that is not too bright and has an unprecedented novel function.SOLUTION: The illumination device includes an LED device for adjusting a period of time in which a power source of the LED device, which is an optical source, is turned ON and a period of time in which the power source is turned OFF on the basis temporal resolution of human eyes so that light from the LED device does not remain on the eyes as an afterimage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an illuminating device, and more specifically, to a non-dazzling illuminating device using temporal resolution of eyes and an afterimage effect of eyes.

  Conventionally, research and development aimed at reducing glare in floodlights and car headlights have been underway.

  For example, in Patent Document 1, which will be described later, when a detection sensor detects an object such as a human being within the irradiation range of a headlight that is a light source of a car, the light source is reduced by turning on / off the power of the light source. An illuminating device that attempts to prevent blindness from being dazzled is disclosed.

  Further, in Patent Document 2 described later, while suppressing the light forward of the point light source to such an extent that it is not dazzling even when viewed directly, while diffusing the light from the point light source diagonally forward or laterally, There has been disclosed an illumination device that irradiates light to a necessary range without wasting light.

  Further, in Patent Document 3 to be described later, the lighting load is turned on / off according to the detection outputs of the human body detection means and the illuminance detection means, in other words, depending on the presence and illuminance of the person in the illumination control area, or An illumination device for dimming and lighting is disclosed.

US Sho 2012/127313 International Publication No. WO2008 / 023797 Pamphlet JP-A-10-189255

  However, in Patent Document 1, when an object that feels dazzling in the light irradiation range is detected, the object is obtained by performing irradiation with finely divided LEDs (hereinafter also referred to as “LED devices”). Against the glare. In Patent Document 2, the point light source emits light in a dispersed manner so as not to be dazzled by direct viewing. In Patent Document 3, the illuminance is controlled as necessary while performing human body detection. Therefore, in each of the above-mentioned documents, there is no contrivance or consideration for preventing dazzling in an always bright environment, and there is no suggestion for such contrivance and consideration.

  The present invention greatly contributes to the provision of a lighting device that can reduce or prevent dazzling by utilizing the temporal resolution of human eyes by solving at least one of the above technical problems. Can do.

  The present inventors have intensively studied to solve the above problems. As a result, the present inventors directly control the eye using the temporal resolution of the eye, which is one of the characteristics / properties of human beings, by controlling the light emission interval of the LED as the light emitter included in the lighting fixture. It has been found that the use of temporal resolution of the eyes is an effective means for the above technical problem so that even if light from the light emitting source enters, the light cannot be felt. In addition, knowledge is obtained that the eyes detect the afterimage of the light that has been diffusely reflected by the emitted LED light, so that the surrounding scenery can be illuminated brightly, in other words, the human eye can feel brighter. It was. The illumination device of the present invention was created from the above viewpoint.

  That is, a typical example of the lighting device according to the present invention uses the temporal resolution of the eyes of a human to control the light emission or extinction (ON or OFF) and the intensity of the light emitting LED. It is necessary to use a control unit (or control circuit unit). The temporal resolution of the human eye varies depending on the person, but is generally 15 milliseconds (in the present application, also expressed as “msec.”) To 100 msec. It can be said that it is within the range. One basis for the temporal resolution of the human eye is the information shown in http://www.kikulab.it-chiba.ac.jp/evolution/hanei.html, One is the information shown in http://mh.rgr.jp/memo/mz0386.htm.

  Therefore, even if the LED as the light source emits light (ON) within the time resolution of the human eye (typically, 15 msec. To 100 msec.), 15 msec. ~ 100 msec. If the light emission of the LED is turned off within this time, the human will not feel light as an afterimage. On the other hand, the OFF time of the light source LED is 15 msec. ~ 100 msec. When the LED is set within the range, the eye does not feel that it is in the OFF state. Therefore, if the LED emits light (ON) immediately after that, the light immediately before the OFF period is left as an afterimage. In other words, the turn-off (OFF) time of the light source LED is 15 msec. ~ 100 msec. If it is set within the range, the eyes will recognize it as continuous light. Therefore, the length of time for turning off the LED is 50 msec. Which is slightly longer than the temporal resolution of the human eye. ~ 150 msec. Need to be set to a longer time.

  Accordingly, one lighting device of the present invention is configured to determine the time for turning on the power of the LED device that is a light source and the time for turning off the power based on the time resolution of the human eye, The LED device is adjusted so as not to leave an afterimage in the eye.

  What can be seen by the human eye according to the present invention is about 15 msec. ~ 100 msec. The luminous flux emitted from the LED in a short time within the range of is formed as reflected light and scattered light that travels straight and hits the object, and draws a gentle wave in the eyes of the human being in the place with a slight delay It will be incident. Therefore, since the time until the reflected light and scattered light, which are more gradual than the light at the time of light emission of the LED, enter the human eye is longer than the light emission time of the LED, the eye of the human being at the place It will remain as an afterimage, in other words, the surroundings will be felt bright. That is, according to one illumination device of the present invention, the direct light of the LED device itself does not remain as an afterimage in the eye, but reflected light and scattered light formed from the direct light remain as an afterimage in the human eye. To be adjusted.

  In addition, the illuminating device which is a suitable example of this invention is an illuminating device which selects an LED device, after calculating the light beam which the LED device which is a light-emitting body light-emits with the place and fixture which use it.

  According to the present invention, for example, it is possible to illuminate the distance brightly with the headlight of a vehicle always directed upward. Even if such headlights are caused to emit light, the driver of the oncoming vehicle does not feel dazzling, or glare can be reduced.

  In addition, according to the present invention, it is possible to realize a light source that is not dazzling to the eyes by brightening the light source during makeup and installing or providing the lighting device of the present invention on a dressing table or portable device. Become.

It is an application figure of the power supply of the LED device used as the light source in one embodiment of this invention. It is a systematic diagram of the whole illuminating device in one embodiment of this invention. It is explanatory drawing explaining the example which implement | achieves a powerful light source by integrating many LED devices as a specific example in other embodiment of this invention.

  Hereinafter, typical embodiments of the non-dazzling illumination device of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited only to the embodiment described above. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Further, since the drawings conceptually describe the embodiments of the present invention, the dimensions and ratios of the components shown may be different from the actual ones.

  FIG. 1 is a graph showing an example of a time interval of ON / OFF switching of an applied voltage by a control unit (control circuit unit) 2 in the lighting device of the present embodiment. FIG. 2 is a schematic diagram showing the configuration of an embodiment of the illumination device of the present invention. In FIG. 1, the cycle of power ON and OFF is shown.

  In the illumination device of the present embodiment, as shown in FIG. 1, the applied voltage ON time (“ta” in FIG. 1) is equal to or more than the time resolution of human eyes (15 msec. To 100 msec.). The shortest feature is to set it short. In addition, as shown in FIG. 1, it is another important feature that the applied voltage OFF time (“tb” in FIG. 1) is set longer than the time resolution of human eyes (15 msec. To 100 msec.). It is.

  That is, as shown in FIG. 2, the illumination device of the present embodiment has a power supply of 15 msec. ~ 100 msec. And a control unit (control) that periodically repeats the time for turning on the power and the time for turning off the power (for example, 50 msec. To 150 msec.) Longer than the ON time after turning on. Circuit portion) 2.

  As described above, by setting the power ON / OFF time and / or cycle, the light beam emitted from the illumination device of the present embodiment passes without being felt by human eyes. Further, by setting the power-off time tb to be longer than the time resolution of the human eye, the time ta, tb or their period is prevented so that the light is not continuously sensed by the afterimage effect of the human eye. Is determined. It should be noted that the above-described respective periods are appropriately adjusted and used according to the place where the lighting device is used and the person who uses it.

  The light beam emitted from the illumination device of the present embodiment is reflected and / or diffusely reflected around a person, and enters a human eye that is in the field drawing a gentle wave with a slight delay. The time that the reflected light and scattered light, which become a mountain that is gentler than the light at the time of light emission of the LED, is incident on the human eye is longer than the light emission time of the LED, so that it remains as an afterimage in the human eye at the place. In other words, the surroundings can be felt bright.

<Other embodiments>
FIG. 3 is an explanatory diagram illustrating an example of realizing a powerful light source by integrating a large number of LED devices as a specific example in another embodiment of the present invention. The illuminating device of this embodiment is provided with at least 2 or more LED devices, bundles the luminous flux emitted from the LED devices, and emits light as a light source using a glass fiber. Therefore, it is a typical example of this embodiment that the light flux emitted from each LED device is bundled at one point by using the glass fiber.

  As shown in FIG. 3, in the present embodiment, at least two or more LED devices are provided, and the luminous flux from the LED devices is allowed to pass through the glass fiber, for example, a convergent light emitting unit (for example, attached to the tip of the glass fiber) A lighting device that projects light from the lens 3 is employed. By adopting such a configuration, it is possible to use the LED device as a powerful LED light source by collecting the tips of the glass fibers without integrating the LED devices in a narrow range.

  As mentioned above, although one Embodiment of the illuminating device of this invention was demonstrated roughly, this invention is not limited only to these. Various design changes are possible within the scope of the technical idea described in the claims, and these design-changed modes are naturally included in the present invention.

LED device 1
Control circuit part 2
Convergent light emitting part 3

Claims (5)

The time for turning on the power of the LED device as the light source and the time for turning off the power are adjusted so that the light of the LED device does not remain as an afterimage in the eye based on the time resolution of the human eye. With LED device,
Lighting device. The power supply is turned on for 15 msec. ~ 100 msec. The time to turn on in the range of
A time (eg, 50 msec. To 150 msec.) For turning off the power supply, which is longer than the ON time after the ON,
With a control unit that periodically repeats
The lighting device according to claim 1. The control unit can further optionally control to always turn on the power supply of the LED device,
The lighting device according to claim 2. The lighting device is used as a projector or as a headlight of a car,
The lighting device according to any one of claims 1 to 3. Comprising at least two or more LED devices, bundling light beams emitted from the LED devices, and using glass fibers to emit light as the light source;
The lighting device according to any one of claims 1 to 4.

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