LED-based intelligent color assessment cabinet

Abstract

The invention discloses an LED-based intelligent color assessment cabinet. A combination of an LED light source and a tungsten lamp is used as a light source for color assessment lighting, and the color assessment light source more excellent in coloring characteristic is obtained by means of combination of spectral power distribution characteristics of the LED light source and the tungsten lamp; since a color filter is arranged in front of the tungsten lamp, more optimized spectral power distribution is obtained to further optimize the coloring characteristics of the color assessment light source. By the aid of light-emitting relative spectral powder distribution data, prestored in a memory unit under drive of different currents or pulse widths, of the LED light source or the tungsten lamp, all types of standard lighting sources can be simulated more accurately, and color assessment realness and reliability are improved.

Description

【Technical field】 [0001] The invention relates to the field of color detection, in particular to a color matching light box. 【Background technique】 [0002] In modern industry, there is an increasing requirement for the consistency and accuracy of the color of similar products. With the continuous development of science and technology, the inspection of product color has initially relied on the inspection personnel to compare the tested sample with the standard color card with the naked eye under ordinary light, so as to distinguish the difference between the tested sample and the standard color card. Color deviation gradually develops to put the tested sample and the standard color card in the color measurement device with built-in standard light source for inspection. The standard light source is often used to simulate artificial light sources under various ambient light. The reflected colors of the surfaces of different objects match, but the spectral power distributions...

AI Technical Summary

Problems solved by technology

Although the LED light source has a rich spectrum, it has disadvantages such as low color rendering index and incomplete spectrum. From the accompanying drawing 5.1 (such as figure 1 It can be clearly seen that the overall effect of the simulation is not very ideal, especially after 630nm the difference in the wavelength band is more obvious, and the high-quality simulated sunlight spectrum cannot be achieved.

The patent with the notification number CN 101883971 A discloses a color measurement device based on fluorescent lamps and multiple light-emitting diodes. Short life and color drift over time are obviously one of the disadvantages of fluorescent lamps. Therefore, this invention uses LED light sources to compensate for the aging of fluorescent lamps. However, since the luminous spectrum of fluorescent lamps is not adjustable and has a large gap with standard light sources, this kind of compensated light source still cannot perform color comparison well.

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