An LED light source for medical endoscopes and a spectrum design method

Abstract

The invention provides an LED light source for medical endoscopes and a spectrum design method. The LED light source comprises a blue light source, a cyan light source, a green light source, a yellow light source, a red light source and a current controller. The LED light source is formed from the light sources with the colors. The blue light source consists of a blue light LED chip. The cyan light source, the green light source, the yellow light source and the red light source consist of blue light LED chips, the corresponding cyan fluorescent powder, green fluorescent powder, yellow fluorescent powder and red fluorescent powder, and filter films, wherein the filter films are blue light filer films. The spectrum design method comprises the steps of irradiating human body tissue and organ samples with the LED light source and a reference light source and obtaining a corresponding reflecting spectrum through testing; calculating color differences; adjusting the chips, the peak values of the fluorescent powder, and the currents of the various light sources according to the results to realize different spectrum distributions; performing repeated calculation until the color differences are consistent. The LED light source has the advantages of high light-emitting intensity, full spectrum without deficiency, flexible control and strong color restoration, has no ultraviolet and infrared parts and is biologically-friendly.

Description

technical field [0001] The invention relates to an LED light source for a medical endoscope, belonging to the field of special medical lighting. Background technique [0002] In the prior art, the light source used in medical endoscopes is mainly xenon lamp. The use time of xenon lamp is only 500-1000 hours, and the luminous efficiency is only tens of lumens per watt, which consumes a lot of energy, and the cost of production and use is high. There are purple light and infrared light with high intensity in the spectrum. When used as an endoscope light source, it will cause burns to the tissues and devices of the human body and generate a lot of heat. With the development of LED light source technology, it has become a trend for LED light sources to replace traditional light sources in endoscopes. LED light sources have the advantages of small size, low heat dissipation, and low price. The optical structure and spectral distribution of the light source are easy to adjust. Co...

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Problems solved by technology

[0002] In the prior art, the light source used in medical endoscopes is mainly xenon lamp. The use time of xenon lamp is only 500-1000 hours, and the luminous efficiency is only tens of lumens per watt, which consumes a lot of energy, and the cost of production and use is high. There are purple light and infrared light with high intensity in the spectrum. When used as an endoscope light source, it will cause burns to the tissues and devices of the human body, and the heat will be large.

With the development of LED light source technology, it has become a trend for LED light sources to replace traditional light sources in endoscopes. LED light sources have the advantages of small size, low heat dissipation, and low price. The optical structure and spectral distribution of the light source are easy to adjust. Convenience and other advantages, but the currently used LED light sources are mainly focused on the optical structure design and heat dissipation structure design of the light source, but there is no report on the spectral design. Since the endoscope is facing the tissues and organs of the human body during use, Due to the different colors, structures, and components of different tissues and organs, the spectrum of the light source required is also different. Therefore, it is necessary to design the spectrum of the light source according to the actual needs of the tissues and organs for different spectra, so as to achieve the maximum performance of the illuminated object. True color, easy for medical workers to judge

[0003] Chinese patent CN101601572B discloses a medical endoscope cold light source device, which uses LED lights as the light source to prepare a light source device including a chassis, a light box, a fan, an output light hole mechanism and a dimming component, which has high brightness, long service life, and safety. Reliable and other advantages, but only the optical and thermal structures are described, the spectrum of the LED lamp used has not been optimized, and the color reproduction ability in the actual application process is poor

Chinese patent CN202371523 discloses a multifunctional LED cold light source by setting a protection circuit and a universal light guide interface to achieve multifunctional and universal characteristics, but it does not mention the spectral characteristics of the LED light source used. Chinese patent CN102155715B discloses a A high-brightness LED cold light source device, which achieves 2500lm high-brightness illuminance through structural design, and does not design and describe the spectral properties of the LED light source it uses

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