LED module and illumination device

Abstract

Provided is a high color saturation LED module and an illumination device which improve vividness of color of an illuminated object even if the color temperature of the ambient light is high, and as a result, are capable of optimally reproducing colors. The peak wavelength of the emission spectrum of blue LEDs is 420 nm-470 nm, and the half width thereof is greater than 0 nm and not greater than 50 nm. The peak wavelength of the emission spectrum of green phosphors is 500 nm-535 nm, and the half width thereof is 100 nm-110 nm. The peak wavelength of the emission spectrum of red phosphors is 610 nm-670 nm, and the half width thereof is 85 nm-95 nm. The correlated color temperature Tc of mixed light of the blue light, green light and red light is 4,600K-7,200K, and the duv thereof from -12 to -6.

Description

technical field [0001] The present invention relates to a high color saturation LED (Light Emitting Diode: Light Emitting Diode) module and a lighting device capable of improving the vividness of the color of an illuminated object. Background technique [0002] In recent years, lighting devices such as LED lamps using LED modules have become widespread. For lamps used for general lighting, it is desirable to be able to ideally see the color of the object illuminated by the light. In general, a method of quantitatively evaluating whether the color of various light sources is good or not is evaluated using a color rendering index (color rendering index), that is, evaluation of "color rendering". This is a method of quantitatively evaluating how faithfully the color of the target light is reproduced compared with the reference light. Based on this evaluation method of "color rendering", various techniques for improving color rendering have been proposed, one of which is to in...

AI Technical Summary

Problems solved by technology

However, even for LED lamps with improved color rendering properties using the technology of Patent Document 1, that is, LED lamps with high color rendering index Ra, in product display applications, there are many luminescent components in the yellow region of the LED light emission spectrum. etc., so that the bright colors of food or objects appear yellowish and dull as a whole, resulting in unsatisfactory color reproduction

[0009] In addition, when the technology of Patent Document 1 is applied to the above-mentioned application, although an LED lamp with improved color rendering can be realized by adding a red phosphor, the addition of a red phosphor will inevitably make the correlated color temperature (correlated color temperature) of the lamp lower. color temperature) (hereinafter also referred to as "color temperature") is reduced, when you want to obtain a higher effect, you can only get a lamp with a low color temperature

However, judging from the recent lighting environment where showcases are placed, installations in stores and warehouses, etc., are increasingly installed in indoor lighting environments with high color temperature.

In this case, if the color temperature of the LED light in the showcase is low, the product illuminated by the LED light will appear yellowish, and the brightness of the color will decrease.

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