JP2006310238A - Lighting system using led - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To irradiate an irradiation object surface with uniform brightness by forming the shape of an LED mounting plate into a protrusive structure. <P>SOLUTION: By forming an illumination plate itself of each LED 1 into a shape having a recessed or projecting curvature factor, confirmation from a distant place is facilitated and a further wide-range of place is allowed to be brightly illuminated. A lighting frequency of the LEDs 1 is changed in response to the shape or distance of a road surface and a place having a slope or undulations is illuminated with uniform brightness. In addition, LEDs having distinct wavelengths are arranged on a light source plate 2 and a bluish color is changed to a warm color. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light source part of an illumination device using LEDs (light emitting diodes) as light sources.

  The industrial products using the current LED technology are researched to improve the efficiency of white LEDs from the structure of a system that obtains various information by observing the light emitting part as seen in backlights and traffic lights of mobile phones. Together, it is developing into a system configuration that applies the light emission characteristics of LEDs.

  When the LED is used as a light emitting unit of illumination, that is, a light source, a white LED or a daylight color LED is mainly used.

  In either case, manufacturers and factories in these LED developments are focusing on increasing the brightness, and are researching to enable higher brightness display (definition of display metrics).

  The near-white LED currently on the market as an industrial product is a method of illuminating a yellow phosphor (long afterglow phosphor) with a blue LED beam, or a blue, green, and red brightness LED. There is a method to obtain white by emitting light simultaneously.

  When LEDs are used for illumination, color changes other than white are not required, so it is common to take the form of blue LED single color emission in consideration of cost.

Problems to be solved by the invention

  The higher the brightness, the sharper the directional characteristics appear, and the light emission characteristics are suitable for spot lighting, but are not suitable for general lighting that needs to illuminate a wide area brightly.

  In addition, the standard specification generally required for lighting equipment is that a uniform target illuminance must be obtained throughout the lighting range.

  However, if we try to illuminate a wide area by reducing the directivity of LED light emission, there is a problem that sufficient target illuminance cannot be obtained.

  On the other hand, when the current or voltage changes, the color changes slightly, and the relative chromaticity coordinates change.

  The white LED for illumination that is currently used generally appears blue due to its structure when the voltage or current fluctuates.

  Sensitivity to human color is called relative luminous sensitivity, and blue and purple are felt dark. Since light with a shorter wavelength, such as blue or purple, has a higher refractive index, such light forms an image in front of the retina. Since this lens is made thin so as to connect the image on the retina after correcting this chromatic aberration, it will appear smaller than the actual object.

Means for solving the problem

  The present invention realizes wide-angle illumination by a method in which a plurality of high-brightness LEDs having sharp brightness and brightness are arranged as light sources arranged on a mounting surface curved forward.

  When the light source LED mounting surface is polygonal and the number of LEDs is increased to increase the irradiation range, the current and voltage are constant for the LED located at the center of the irradiation plate and the LED located at the side of the irradiation plate. It keeps changing to automatically.

  This makes it possible to ensure uniform illuminance for the entire area to be irradiated, even when installed on a slope in a mountainous area, for example, when the irradiated surface is not uniformly flat. .

  In addition, a plurality of LEDs with different wavelengths are used for the LED embedded in the light source LED plate, and lighting is performed simultaneously or alternately.

  This gives the effect of recognizing the uneven part in the illumination range with a three-dimensional sense, halving the phenomenon of blue, and it becomes a lighting device that feels bright and compensates for high vision.

  This illuminating device is not limited to the case where the LED mounting surface is convex, but is also considered to be effective in the case of a front sphere or even a concave body.

The invention's effect

  Thus, the brightness of the illuminated surface can be illuminated uniformly by using a convex structure for the LED mounting plate.

  In addition, according to this lighting equipment, it is easy to check the lighting from a remote place because of the structure where the irradiating part protrudes from the front, which can be useful for disaster evacuation behavior, such as speeding up the recognition of direction sense. Be expected.

  In addition, it can be applied to various places such as inclined road surfaces, stairs, curved roads, etc., and the brightness, frequency, and concave angle of the LED can be freely changed according to the shape of the irradiated object, so that it can be uniformly illuminated at any place. Will be realized.

Consider a light source plate in which LEDs are arranged vertically and horizontally as shown in Fig. 1. As shown in Fig. 1 (2) seen from the bottom, the surface is curved so that a wide area can be irradiated.

As shown in Fig. 2, the curved surface in Fig. 1 (2) is replaced with a polyhedral shape.

  further

The method of realizing can be easily achieved by, for example, selecting some of the LEDs in FIG.

  If it is used as a general street light for crime prevention, it can take advantage of power saving, durability and noiselessness. In addition, when installed in combination with a solar power generation system, the energy saving effect is tremendous, and the maximum power is also demonstrated in areas and places where power supply is difficult, as well as disaster prevention lights when power supply is interrupted.

Above

By adding the present invention, it is possible to adapt the installation to locations under more diverse conditions, and to improve the function as a bright and eye-friendly crime prevention light and disaster prevention light.

LED lighting device light source plate example 1 (1) Front (2) Bottom (3) Side LED lighting device light source plate example 2 (bottom surface)

Explanation of symbols

1 LED
2 LED illumination light source plate 3 Light source plate support shaft 4 Light source plate support bearing bracket 5 Polyhedral shape LED illumination light source plate with a small number of surfaces 6 Polyhedral shape LED illumination light source plate with a large number of surfaces 7 Light source plate fixing box

Claims (3)

  An illuminating device in which a plurality of high-intensity LEDs (light emitting diodes) are arranged side by side on a convex or concave surface or a polyhedral surface and can be used as a light source plate to irradiate a wide area.   For each LED located on the LED (light-emitting diode) light source plate, the light intensity is adjusted by changing the light emission frequency while keeping the current and voltage constant, and the brightness of the irradiated surface with different distance and surface reflectance can be adjusted. Lighting device that can irradiate uniformly.   Illumination LEDs (Light Emitting Diodes) Light source plates are illuminated with multiple LEDs that emit light of different wavelengths, so that the unevenness of the irradiated part can be recognized three-dimensionally, and the phenomenon of blue color is reduced by half, resulting in a high vision compensation effect A lighting device.

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